JP6330246B2 - Lens body and vehicle lamp - Google Patents

Description

  The present invention relates to a lens body and a vehicular lamp, and more particularly, to a lens body configured to form a high beam light distribution pattern and a vehicular lamp including the lens body.

  Conventionally, a vehicular lamp including a lens body configured to form a high beam light distribution pattern has been proposed (see, for example, Patent Document 1).

  FIG. 88 is a side view of the vehicular lamp 200 described in Patent Document 1. FIG.

  As shown in FIG. 88, a vehicular lamp 200 described in Patent Document 1 is arranged at a projection lens 210 (plano-convex lens) having a convex front surface and a flat rear surface, and a rear focal position of the projection lens 210. It is configured as a direct projection type (also referred to as direct light type) vehicular lamp including the light source 220 (light emitting diode) and the like.

JP 2007-213877 A

  However, in the vehicular lamp 200 having the above configuration, since only one high beam light distribution pattern can be formed by one lens body 210, for example, a high beam light distribution pattern in which a condensing pattern and a diffusion pattern are superimposed is formed. In this case, there is a problem that the vehicle lamp 200 (lens body 210) configured for the condensing pattern and the vehicle lamp 200 (lens body 210) configured for the diffusion pattern must be prepared.

  The present invention has been made in view of such circumstances, and a lens body capable of forming a high beam light distribution pattern in which a condensing pattern and a diffusion pattern are superimposed by one, and a vehicle equipped with the lens body. The purpose is to provide a lamp.

  In order to achieve the above object, the invention according to claim 1 is a lens body disposed in front of the light source, and includes a rear end portion and a front end portion, and the light from the light source incident on the inside of the lens body. However, in the lens body configured to form a high-beam light distribution pattern in which the light collection pattern and the diffusion pattern are superimposed by being emitted from the front end and irradiated forward, the rear end is A diffusion pattern incidence surface; a diffusion pattern reflection surface that internally reflects light from the light source that has entered the lens body from the diffusion pattern incidence surface; a condensing pattern incidence surface; A light converging pattern reflecting surface for internally reflecting light from the light source that has entered the lens body from the light pattern incident surface; and the front end includes a diffusion pattern emitting surface and a light condensing pattern reflecting surface. Outgoing The diffusion pattern entrance surface, the diffusion pattern reflection surface, and the diffusion pattern exit surface are light from the light source that has entered the lens body from the diffusion pattern entrance surface. Constitutes a first optical system that exits from the exit surface for the diffusion pattern and is irradiated forward to form the diffusion pattern. The entrance surface for the condensing pattern, the reflection for the condensing pattern The light from the light source that is incident on the inside of the lens body from the incident surface for the condensing pattern and is internally reflected by the reflecting surface for the condensing pattern The second optical system that emits from the exit surface for the condensing pattern and is irradiated forward to form the condensing pattern constitutes a second optical system between the light source and the reflecting surface for the condensing pattern. The distance is the light source and the Compared to the distance between the reflecting surface for diffusing pattern, characterized in that it is set longer.

  According to the first aspect of the present invention, it is possible to provide a lens body that can form a high-beam light distribution pattern in which a light collection pattern and a diffusion pattern are superimposed.

  This is because one lens body includes a first optical system that forms a diffusion pattern and a second optical system that forms a condensing pattern.

  According to the first aspect of the present invention, as a result of the light intensity of the condensing pattern being higher than that of the diffusion pattern, the high beam light distribution pattern (synthetic light distribution) formed by superimposing the condensing pattern and the diffusion pattern. The pattern) can have a high central luminous intensity and excellent distant visibility.

  The light intensity of the condensing pattern is higher than the diffusion pattern because the distance between the light source and the exit surface for the condensing pattern is set longer than the distance between the light source and the exit surface for the diffusion pattern. Therefore, in the second optical system for forming the condensing pattern, the light source image of the light source is relatively small compared to the first optical system for forming the diffusion pattern, and the light is condensed with this relatively small light source image. This is because a pattern is formed.

  The invention according to claim 2 is the invention according to claim 1, wherein the entrance surface for the diffusion pattern extends rearward from the first entrance surface and the outer peripheral edge of the first entrance surface, A cylindrical second incident surface surrounding a range other than a notch through which light from the light source passes in a space between the light source and the first incident surface; and the reflection surface for the diffusion pattern is A reflecting surface that is disposed outside the second incident surface and internally reflects light from the light source that has entered the lens body from the second incident surface, and the incident surface for the condensing pattern is An incident surface on which light from the light source that has passed through the notch is incident, and the reflecting surface for the condensing pattern is disposed outside the incident surface for the condensing pattern, and is incident on the condensing pattern The light from the light source incident on the lens body from the surface Characterized in that it is a reflective surface that faces the reflection.

  According to the invention described in claim 2, the same effect as in claim 1 can be obtained.

  The invention according to claim 3 is the invention according to claim 2, wherein the exit surface for the diffusion pattern is a semi-cylindrical surface with a cylindrical axis extending in the horizontal direction, or a slant angle and / or a camber angle. Is formed as a semi-cylindrical surface, and the first incident surface has a vertical direction in which light from the light source incident on the lens body from the first incident surface is used for the diffusion pattern. The surface shape is configured to condense in the vicinity of the focal line of the exit surface and diffuse in the horizontal direction, and the reflection surface for the diffusion pattern is formed from the second entrance surface to the lens body. The light from the light source that has entered the inside and is internally reflected by the reflecting surface for the diffusion pattern is focused in the vicinity of the focal line of the exit surface for the diffusion pattern in the vertical direction, and in the horizontal direction, The surface shape is structured so as to diffuse. Characterized in that it is.

  According to the third aspect of the present invention, it is possible to provide a lens body having a new appearance in which the exit surface for the diffusion pattern is a semi-cylindrical surface (cylindrical surface).

  The invention according to claim 4 is the invention according to claim 2, wherein the exit surface for the diffusion pattern is configured as a plane surface, and the first entrance surface is formed from the first entrance surface. The surface shape is configured so that light from the light source that enters the lens body and exits from the exit surface for the diffusion pattern is collimated in the vertical direction and diffused in the horizontal direction. The reflection surface for the diffusion pattern is incident on the inside of the lens body from the second incident surface, is internally reflected by the reflection surface for the diffusion pattern, and is emitted from the light source that is emitted from the emission surface for the diffusion pattern. The surface shape of the light is collimated in the vertical direction and diffused in the horizontal direction.

  According to the fourth aspect of the present invention, it is possible to provide a lens body having a new appearance in which the exit surface for the diffusion pattern is a plane surface.

  The invention according to claim 5 is the invention according to any one of claims 2 to 4, wherein the exit surface for the condensing pattern is configured as a plane surface, and The reflecting surface of the light condensing pattern is incident on the inside of the lens body from the incident surface for the condensing pattern, is internally reflected by the reflecting surface for the condensing pattern, and is emitted from the light source that is emitted from the emitting surface for the condensing pattern. The surface shape is configured so that light is collimated in the vertical direction and the horizontal direction.

  According to the fifth aspect of the present invention, it is possible to provide a lens body having a new appearance, in which the exit surface for the condensing pattern is a plane surface.

  The invention according to claim 6 is the invention according to any one of claims 2 to 4, wherein the light exit surface for the condensing pattern is a planar shape continuous to a lower end edge of the light exit surface for the diffusion pattern. The condensing pattern reflecting surface is incident on the inside of the lens body from the condensing pattern incident surface and is internally reflected by the condensing pattern reflecting surface. The surface shape is configured such that light from the light source emitted from the light pattern emission surface is collimated in the vertical direction and the horizontal direction.

  According to the sixth aspect of the present invention, it is possible to provide a lens body having a new appearance in which the exit surface for the condensing pattern is continuous with the lower end edge of the exit surface for the diffusion pattern.

  The invention according to claim 7 is the invention according to any one of claims 2 to 6, wherein the light incident surface for the condensing pattern is configured as a spherical surface centered on the light source. It is characterized by that.

  According to the seventh aspect of the invention, it is possible to suppress the Fresnel reflection loss when the light from the light source is incident on the inside of the lens body from the incident surface for the condensing pattern.

  The present invention can also be specified as follows.

  A vehicle lamp comprising the lens body according to any one of claims 1 to 7 and the light source.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the lens body which can form the high beam light distribution pattern on which the condensing pattern and the diffusion pattern were superimposed by one, and a vehicle lamp provided with the same.

It is a longitudinal section of vehicular lamp 10 which is a 1st embodiment of the present invention. (A) The perspective view of the lens body 12 seen from the front, (b) The perspective view of the lens body 12 seen from the back. (A) Top view of lens body 12, (b) Bottom view, (c) Side view. (A) The figure showing a mode that the light from the light source 14 (precisely the reference point F) injects into the entrance plane 12a, (b) The light (direct light RayA) from the light source 14 which injected into the lens body 12 inside. It is a figure showing a mode that it condenses. It is an example (transverse sectional view) of the incident surface 12a. It is another example (transverse cross section) of the entrance plane 12a. (A) (b) It is a figure for demonstrating the distance between the entrance plane 12a and the light source 14. FIG. It is a figure for demonstrating the role of the shade 12c. (A) Schematic diagram of the shade 12c viewed from the position of the light source 14, (b) An enlarged perspective view enlarging the reflecting surface 12b (including the shade 12c) shown in FIG. 2 (a), (c) FIG. 2 (a). It is a top view of the reflective surface 12b (including shade 12c) shown in FIG. (A)-(c) It is the modification (side view) of the shade 12c. (A) An example of a low-beam light distribution pattern P1 formed on a virtual vertical screen (disposed approximately 25 m ahead from the front of the vehicle) by the vehicular lamp 10 according to the first embodiment, (B) An example of the light distribution pattern P2 for low beam, (c) An example of the light distribution pattern P3 for low beam. It is a figure for demonstrating light source image I _Cs1 -I _Cs4 by the light from the light source 14 in each cross section _{Cs1- Cs4} . (A) When reflecting surface 12b is arranged in the horizontal direction, a diagram depicting a situation in which reflected light RayB ′ internally reflected by reflecting surface 12b travels in a direction not incident on exit surface 12d, (b) reflecting surface 12b FIG. 6 is a diagram illustrating a state in which the reflected light RayB internally reflected by the reflecting surface 12b travels in a direction to enter the exit surface 12d when it is arranged to be inclined with respect to the first reference axis AX1. (A) When the reflective surface 12b is arranged in the horizontal direction, a diagram depicting a state in which the reflected light RayB ′ traveling in the direction not incident on the exit surface 12d can be captured by extending the reflective surface 12b upward; b) When the reflecting surface 12b is disposed so as to be inclined with respect to the first reference axis AX1, more light (reflected light RayB internally reflected by the reflecting surface 12b) is captured without extending the reflecting surface 12b upward. FIG. (A) The second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is condensed toward the second reference axis AX2 toward the shade 12c at least in the vertical direction. In this case, a diagram depicting a state in which most of the light from the light source 14 incident on the inside of the lens body 12 is shielded by the shade 12c. When the light from the light source 14 incident on the inside of the lens body 12 is condensed toward the second reference axis AX2 toward the shade 12c at least in the vertical direction, the light captured by the emission surface 12d (the inner surface of the reflection surface 12b) It is the figure which showed a mode that reflected reflected light RayB) increased. It is a perspective view of 10 A of vehicle lamps which are 2nd Embodiment of this invention. (A) The longitudinal cross-sectional view of 10 A of vehicle lamps, (b) It is a figure showing a mode that the light from the light source 14 advances the inside of the lens body 12A. It is a top view showing a mode that a plurality of vehicular lamps 10 (a plurality of lens bodies 12) of a 1st embodiment are arranged in a line. (A) Front view showing a state in which a plurality of vehicular lamps 10A (a plurality of lens bodies 12A) of the second embodiment are arranged in a line in the horizontal direction, (b) a top view. (A) An example of a low beam light distribution pattern P1a formed on a virtual vertical screen (disposed approximately 25 m ahead from the front of the vehicle) facing the front of the vehicle by the vehicle lamp 10A of the second embodiment, (B) An example of the low beam light distribution pattern P1b, (c) an example of the low beam light distribution pattern P1c. (A) Top view of lens body 12A of 2nd Embodiment, (b) Side view, (c) Bottom view. It is an example (cross-sectional view) of the 1st entrance plane 12a. It is a perspective view for demonstrating lens body 12A (1st output surface 12A1a, 2nd entrance surface 12A2a, and 2nd output surface 12A2b) of 2nd Embodiment. It is a figure for demonstrating each normal line of 1st output surface 12A1a, 2nd entrance surface 12A2a, and 2nd output surface 12A2b. It is a figure explaining lens body 12B which is the 1st modification of lens body 12A of a 2nd embodiment. It is a perspective view for demonstrating lens body 12C (1st output surface 12A1a, 2nd entrance surface 12A2a, and 2nd output surface 12A2b) which is the 2nd modification of lens body 12A of 2nd Embodiment. It is a front view showing a mode that a plurality of vehicular lamps 10C (a plurality of lens bodies 12C) are arranged in a line in the vertical direction. It is the schematic of the direct projection type vehicle lamp 20 to which the idea of "disassembling a condensing function" is applied. This is an example of a high beam light distribution pattern P _Hi formed on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle. It is the schematic of the projector type vehicle lamp 30 to which the idea of "disassembling a condensing function" is applied. (A) Side view (only main optical surface) of vehicular lamp 10D (fifth embodiment) provided with a camber angle, (b) Top view (only main optical surface), (c) Formed by vehicular lamp 10D (D) Side view (only main optical surface) of vehicular lamp 10A of the second embodiment in which no camber angle is given, (e) Top view (only main optical surface) (F) It is an example of the light distribution pattern for low beams formed by 10 A of vehicle lamps of 2nd Embodiment. It is a top view (only main optical surface) for demonstrating the problem at the time of providing the camber angle. It is a figure for demonstrating the problem which appears in the light distribution pattern for low beams when a camber angle is provided. (A) Cross-sectional view at position B shown in FIG. 32 (only main optical surface), (b) Cross-sectional view at position C shown in FIG. 32 (only main optical surface). (A) It is a perspective view (only main optical surface) of vehicular lamp 10D of this embodiment, (b) It is a perspective view (only main optical surface) of vehicular lamp 10A of 2nd Embodiment. It is a front view of vehicle lamp 10E (6th Embodiment) to which the slant angle | corner was provided. (A) The figure for demonstrating the problem which appears in the light distribution pattern for low beams when a slant angle | corner is provided, (b) It is the figure which represented typically Fig.37 (a). (A) The figure for demonstrating that the problem (rotation) which appears in the light distribution pattern for low beams was suppressed, (b) The figure which represented typically Fig.38 (a). (A) Side view (main optical surface only) of vehicular lamp 10F (seventh embodiment) provided with camber angle and slant angle, (b) Top view (only main optical surface), (c) Vehicular lamp It is an example of the light distribution pattern for low beams formed by 10F. (A) Side view (only main optical surface) of vehicular lamp 10G of the first comparative example, (b) Top view (only main optical surface), (c) Example of light distribution pattern formed by vehicular lamp 10G It is. (A) Side view of vehicle lamp 10H of second comparative example (only main optical surface), (b) Top view (only main optical surface), (c) Example of light distribution pattern formed by vehicle lamp 10H It is. (A) An example of a low beam light distribution pattern formed by the vehicular lamp 10D of the fifth embodiment (also the vehicular lamp 10F of the seventh embodiment) when the camber angle θ1 is 30 °, (b) It is an example of the low beam light distribution pattern formed by the vehicular lamp 10D of the fifth embodiment (the same applies to the vehicular lamp 10F of the seventh embodiment) when the camber angle θ1 is 45 °. It is sectional drawing (only main optical surfaces) of 10 A of vehicle lamps of 2nd Embodiment. (A) An example in which, in the second emission surface 12A2b, the lower partial region 12A2b2 from which light upward to the horizontal is emitted is physically cut to leave the upper region 12A2b1, (b) the second emission surface The surface shape (for example, curvature) of the partial region 12A2b2 is set so that the light Ray2 from the light source 14 emitted from the lower partial region 12A2b2 of 12A2b becomes parallel or downward with respect to the first reference axis AX. In this example, the second emission surface 12A2b is adjusted and divided into an upper region 12A2b1 and a lower region 12A2b2. The second reference axis AX2 is a top view (only the main optical surface) of the vehicular lamp 10I that is inclined with respect to the first reference axis AX1 when viewed from above. It is a perspective view of vehicle lamp 10J (lens body 12J). (A) Top view of vehicle lamp 10J (lens body 12J), (b) Front view, (c) Side view. (A) Example of low beam light distribution pattern P _LO (synthetic light distribution pattern) formed by the vehicular lamp 10J (lens body 12J), (b) to (d) Each part of the distributed light constituting FIG. 48 (a) This is an example of patterns P _SPOT , P _MID , and P _WIDE . (A) Side view of first optical system (only main optical surface), (b) Top view of second optical system (only main optical surface), (c) Side view of third optical system (only main optical surface) It is. (A) Front view of first rear end portion 12A1aa of first lens portion 12A1, (b) AA sectional view (schematic diagram) in FIG. 50 (a), (c) BB in FIG. 50 (a). It is sectional drawing (schematic diagram). It is a front view (photograph) of the vehicular lamp 10J (lens body 12J) showing a state where multipoint light emission is performed. (A) Side view of the vehicular lamp 10E (lens body 12A) of the sixth embodiment (only main optical surface from which the first emission surface 12A1a is omitted), (b) Top view (main from which the first emission surface 12A1a is omitted) (D) optical surface only), (d) side view (only main optical surface with the first emission surface 12A1a omitted), and (e) top view (only main optical surface with the first emission surface 12A1a omitted). FIG. 52A is a top view in which the first emission surface 12A1a is added to FIG. 52B, and FIG. 52B is a top view in which the first emission surface 12A1a is added to FIG. (A) (b) It is an example of adjustment of the surface shape of a pair of left and right entrance surfaces 42a and 42b and / or a pair of left and right side surfaces 44a and 44b constituting the second optical system. (A) (b) It is an example of adjustment of the surface shape of the upper entrance surface 42c which comprises a 3rd optical system. It is a perspective view of the vehicle lamp 10K (lens body 12K) of 11th Embodiment. (A) Top view of vehicle lamp 10K (lens body 12K), (b) Front view, (c) Side view. (A) Example of low beam light distribution pattern P _LO (synthetic light distribution pattern) formed by vehicle lamp 10K (lens body 12K), (b) to (d) Each part of light distributed in FIG. 58 (a) This is an example of patterns P _SPOT , P _MID , and P _WIDE . (A) The side view of a 1st optical system, (b) It is an enlarged side view. (A) Top view of 2nd optical system, (b) Side view of 3rd optical system. (A) Front view of rear end portion 12Kaa of lens body 12K, (b) A1-A1 cross-sectional view (schematic diagram) in FIG. 61 (a), (c) B1-B1 cross-sectional view (schematic model) in FIG. Figure). (A)-(c) The incident surfaces 12a, 42a, 42b, 42c form a V shape (or a part of the V shape) that opens toward the front end 12Kbb in a top view and / or a side view. It is a figure showing having done. (A)-(c) It is a figure showing the optical path which external light RayCC and RayDD (for example, sunlight) which entered into the lens body 12K from the output surface 12Kb follow. FIG. 5 is a diagram illustrating an optical path in which a light source 50 that is regarded as external light is disposed in front of a lens body 12K, and light from the light source 50 that enters the lens body 12K from the exit surface 12Kb follows. (A) The longitudinal cross-sectional view showing the optical path which the light from the light source 14 which injected into the lens body 12K of 11th Embodiment follows, (b) It is a perspective view of 12L (modified example). (A)-(c) The figure showing the measurement result (luminance distribution) of the output surface 12Kb of lens body 12L (this modification), (d)-(f) Lens body of a comparative example (lens body of 11th Embodiment) It is a figure showing the measurement result (luminance distribution) of the output surface 12Kb of 12K). (A) A cross-sectional view showing an optical path followed by light from a light source 14 that has entered the lens body 12K of the eleventh embodiment, and (b) a perspective view of the lens body 12M (this modification). (A) (b) It is a perspective view of the lens coupling body 16L which connected the several lens body 12L which is the 1st modification of the lens body 12K of 11th Embodiment. It is a perspective view of vehicle lamp 10N (lens body 12N). (A) Top view of vehicle lamp 10N (lens body 12N), (b) Front view, (c) Side view. (A) Example of low beam light distribution pattern P _LO (synthetic light distribution pattern) formed by vehicle lamp 10N (lens body 12N), (b) Example of spot light distribution pattern P _SPOT , (c) Mid An example of the light distribution pattern P _{MID_L} , (d) an example of the mid light distribution pattern P _{MID_R} , and (e) an example of the wide light distribution pattern P _WIDE . (A) Front view of 1st rear end part 12A1aa of 1st lens part 12A1, (b) BB sectional drawing (schematic figure) of Fig.72 (a). It is a cross-sectional view (only main optical surface) of a 2nd optical system. It is a longitudinal cross-sectional view (only main optical surface) of a 2nd optical system. It is an expansion perspective view near the 2nd lower reflective surface 48a (and shade 48c) arranged on the left side. It is a side view (only main optical surface) of a 3rd optical system. (A) The figure showing the glare generated when the light source 14 (light emitting surface) is 1 mm square, and the relative positional relationship of the lens body 12J with respect to the light source 14 is shifted by +0.2 mm from the design value in the Y direction (vertical direction). (B) It is a figure showing that a glare does not generate | occur | produce in the mid light distribution pattern P _MID when the relative positional relationship of the lens body 12J with respect to the light source 14 is as a design value. It is a figure showing that a glare generate | occur | produces when the relative positional relationship of the lens body 12N with respect to the light source 14 has shifted | deviated from the design value to the Y direction (vertical direction). (A) The longitudinal cross-sectional view of the vehicle lamp 60 (lens body 62), (b) It is a front view. (A) Example of high beam light distribution pattern P _Hi (combined light distribution pattern) formed by vehicle lamp 60 (lens body 62), (b) Example of wide light distribution pattern P _{Hi_WIDE} , (c) For spot It is an example of the light distribution pattern P _{Hi_SPOT} . FIG. 6 is a front view of a rear end portion 62a of the lens body 62 (in the vicinity of a first incident surface 62a1, a second incident surface 62a2, and a reflection surface 62a3 for a wide light distribution pattern). It is a longitudinal cross-sectional view of the lens body 62 (modified example). (A) The figure showing a mode that the light from the light source 14 which injects into the inside of the lens body 62 from the entrance surface A (1st entrance surface 62a1 and 2nd entrance surface 62a2) for wide light distribution patterns spreads in a horizontal direction. (B) The light from the light source 14 incident on the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern is internally reflected and collimated by the reflection surface 62a6 for the spot light distribution pattern. FIG. It is a longitudinal cross-sectional view of the exit surface 62b2 (modified example) for the spot light distribution pattern. It is a longitudinal cross-sectional view of the lens body 62 (modified example). It is a longitudinal section of lens body 62A (modification). It is a longitudinal section of rear end part 62a of lens body 62B (modification). It is a side view of the vehicular lamp 200 described in Patent Document 1.

  Hereinafter, the vehicle lamp which is 1st Embodiment of this invention is demonstrated, referring drawings.

  FIG. 1 is a longitudinal sectional view of a vehicular lamp 10 according to a first embodiment of the present invention.

  As shown in FIG. 1, the vehicular lamp 10 of the present embodiment includes a lens body 12, a light source 14 disposed in the vicinity of the incident surface 12 a of the lens body 12, and the like, and a virtual vertical screen (vehicle) It is configured as a vehicle headlamp that forms a low beam light distribution pattern P1 including cut-off lines CL1 to CL3 on the upper edge shown in FIG. ing.

  2A is a perspective view of the lens body 12 viewed from the front, FIG. 2B is a perspective view of the lens body 12 viewed from the rear, FIG. 3A is a top view of the lens body 12, and FIG. FIG. 3B is a bottom view, and FIG. 3C is a side view.

  As shown in FIG. 1, the lens body 12 is a lens body having a shape extending along a first reference axis AX1 extending in the horizontal direction, and includes an entrance surface 12a, a reflection surface 12b, a shade 12c, an exit surface 12d, and an entrance surface 12a. The reference point F in the optical design arranged in the vicinity is included. The entrance surface 12a, the reflection surface 12b, the shade 12c, and the exit surface 12d are arranged in this order along the first reference axis AX1. The material of the lens body 12 may be polycarbonate, other transparent resin such as acrylic, or glass.

  A dotted line with an arrow at the tip in FIG. 1 represents an optical path of light from the light source 14 (more precisely, the reference point F) that has entered the lens body 12.

The main functions of the lens body 12 are firstly to capture the light from the light source 14 into the lens body 12, and secondly to proceed toward the exit surface 12d of the light captured into the lens body 12. The light intensity distribution (light source image) formed in the vicinity of the focal point F _12d of the exit surface 12d (lens unit) is inverted and projected by the direct light RayA and the reflected light RayB that is internally reflected by the reflecting surface 12b, and is cut off on the upper edge. Forming a light distribution pattern for low beam including

  4A shows a state in which light from the light source 14 (precisely, the reference point F) enters the incident surface 12a, and FIG. 4B shows light from the light source 14 that has entered the lens body 12. FIG. It is a figure showing a mode that (direct light RayA) condenses.

  The incident surface 12a is formed at the rear end of the lens body 12, and is light from the light source 14 (precisely, the reference point F in optical design) disposed in the vicinity of the incident surface 12a (see FIG. 4A). ) Is refracted and incident on the inside of the lens body 12 (for example, a free-form curved surface convex toward the light source 14), and light (direct light RayA) incident on the lens body 12 is at least in the vertical direction. , The surface shape is configured so as to converge toward the second reference axis AX2 toward the shade 12c (see FIG. 4B). The second reference axis AX2 passes through the center of the light source 14 (precisely, the reference point F) and a point near the shade 12c, and is inclined obliquely forward and downward with respect to the first reference axis AX1 ( (See FIG. 1).

The light source 14 includes, for example, a semiconductor substrate (not shown) such as a metal substrate (not shown) and a white LED light source (or white LD light source) mounted on the surface of the substrate. The number of semiconductor light emitting elements may be one or more. The light source 14 may be a light source other than a semiconductor light emitting element such as a white LED light source (or a white LD light source). The light source 14 is in the vicinity of the incident surface 12a of the lens body 12 in a posture in which the light emitting surface (not shown) is directed obliquely forward and downward, that is, in a posture in which the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX2. (Near reference point F). The light source 14 is configured so that the optical axis AX ₁₄ of the light source 14 does not coincide with the second reference axis AX 2 (for example, the attitude in which the optical axis AX ₁₄ of the light source 14 is disposed in the horizontal direction). You may arrange | position in the entrance plane 12a vicinity (reference point F vicinity).

When the light source 14 is a semiconductor light emitting element (for example, a white LED light source), the directivity characteristic of light emitted from the light source 14 (light emitting surface) is Lambertian and can be expressed as I (θ) = I0 × cos θ. This represents the spread of light emitted by the light source 14. However, I (θ) represents the light intensity from the optical axis AX ₁₄ of the angle theta inclined direction of the light source 14, I0 represents the intensity on the optical axis AX _14. In the light source 14, the luminous intensity on the optical axis AX ₁₄ (θ = 0) is maximized.

  FIG. 5 is an example (transverse sectional view) of the incident surface 12a, and FIG. 6 is another example (transverse sectional view) of the incident surface 12a.

  As shown in FIG. 5, in the horizontal direction, the incident surface 12 a condenses light from the light source 14 that has entered the lens body 12 (direct light RayA) toward the first reference axis AX1 toward the shade 12 c. Thus, the surface shape is configured. In addition, as shown in FIG. 6, the incident surface 12a is such that the light from the light source 14 (direct light RayA) incident on the inside of the lens body 12 is parallel to the reference axis AX1 in the horizontal direction. The surface shape may be configured.

  The degree of horizontal diffusion of the low beam light distribution pattern can be freely adjusted by adjusting the shape of the incident surface 12a (for example, the curvature of the incident surface 12a in the horizontal direction).

  FIG. 7A and FIG. 7B are diagrams for explaining the distance between the incident surface 12 a and the light source 14.

Compared with the case where the distance between the incident surface 12a and the light source 14 is increased (see FIG. 7A) by shortening the distance between the incident surface 12a and the light source 14 (see FIG. 7B). The light source image becomes smaller. As a result, the maximum luminous intensity of the luminous intensity distribution (and the low beam light distribution pattern) formed in the vicinity of the focal point F _{12d of} the emission surface 12d (lens portion) can be increased.

  Further, by shortening the distance between the incident surface 12a and the light source 14 (see FIG. 7B), the distance between the incident surface 12a and the light source 14 is increased (see FIG. 7A). As compared with the above, light from the light source 14 taken into the lens body 12 increases (β> α). As a result, a highly efficient lens body is obtained.

  The reflecting surface 12b is a planar reflecting surface extending in the horizontal direction from the lower end edge of the incident surface 12a toward the front. The reflective surface 12b is a reflective surface that totally reflects the light incident on the reflective surface 12b out of the light from the light source 14 that has entered the lens body 12, and metal deposition is not used. Of the light from the light source 14 that has entered the lens body 12, the light that has entered the reflecting surface 12 b is internally reflected by the reflecting surface 12 b and travels toward the exit surface 12 d, and is refracted by the exit surface 12 d and travels toward the road surface. That is, the reflected light RayB internally reflected by the reflecting surface 12b is folded back at the cutoff line and superimposed on the light distribution pattern below the cutoff line. Thereby, a cut-off line is formed at the upper edge of the low beam light distribution pattern.

  The reflective surface 12b may be a planar reflective surface that is inclined obliquely forward and downward with respect to the first reference axis AX1 from the lower end edge of the incident surface 12a (see FIG. 14B). The advantage of arranging the reflecting surface 12b so as to be inclined with respect to the first reference axis AX1 will be described later.

  A shade 12c extending in the left-right direction is formed at the tip of the reflecting surface 12b.

  FIG. 8 is a diagram for explaining the role of the shade 12c.

As shown in FIG. 8, the main role of the shade 12c is to block part of the light from the light source 14 incident on the inside of the lens body 12, and at the lower end edge near the focal point F _{12d of the} exit surface 12d (lens portion). Forming a light intensity distribution (light source image) including a side corresponding to the cutoff line defined by the shade 12c.

  FIG. 9A is a schematic view of the shade 12c viewed from the position of the light source 14, and FIG. 9B is an enlarged perspective view of the reflecting surface 12b (including the shade 12c) shown in FIG. FIG. 3C is a top view of the reflecting surface 12b (including the shade 12c) shown in FIG.

  As shown in FIGS. 2A and 9A to 9C, the shade 12c includes a side e1 corresponding to the left horizontal cutoff line, a side e2 corresponding to the right horizontal cutoff line, and the left horizontal. An edge e3 corresponding to the oblique cut-off line connecting the cut-off line and the right horizontal cut-off line is included.

  The reflective surface 12b is a first reflective region 12b1 between the lower edge of the incident surface 12a and the side e1 corresponding to the left horizontal cutoff line, and between the lower edge of the incident surface 12a and the side e2 corresponding to the right horizontal cutoff line. The second reflection area 12b2 and the third reflection area 12b3 between the first reflection area 12b1 and the second reflection area 12b2.

  The first reflection region 12b1 is gradually curved upward as it approaches the side e1 corresponding to the left horizontal cut-off line from the lower end edge of the incident surface 12a, while the second reflection region 12b2 is lower end edge of the incident surface 12a. Extends horizontally from the front to the front.

  As a result, the side e1 corresponding to the left horizontal cut-off line is arranged at a level higher than the side e2 corresponding to the right horizontal cut-off line in the vertical direction (in the case of right-hand traffic). Of course, the side e1 corresponding to the left horizontal cutoff line may be arranged at a position one step lower than the side e2 corresponding to the right horizontal cutoff line in the vertical direction (in the case of left-hand traffic).

  The shade 12c has a groove corresponding to the left horizontal cut-off line, a groove corresponding to the right horizontal cut-off line, and an oblique cut-off line connecting the left horizontal cut-off line and the right horizontal cut-off line at the tip of the reflecting surface 12b. It can also form by forming the groove part containing the groove part corresponding to.

  10 (a) to 10 (c) show a modified example (side view) of the shade 12c. The shade 12c may extend upward from the tip of the reflecting surface 12b in a side view (see FIG. 10A), or may extend obliquely upward in the front direction (FIG. 10 ( b)), and may be curved and extended forward and obliquely upward (see FIG. 10C). The shade 12c is not limited to these, and may have any shape as long as a part of the light from the light source 14 entering the lens body 12 is shielded so as not to travel toward the exit surface 12d. In addition, you may use the light-shielded light for another light distribution and light guide.

As shown in FIG. 1, the exit surface 12 d is internally reflected by the direct light RayA that travels toward the exit surface 12 d and the reflection surface 12 b of the light from the light source 14 that has entered the lens body 12. A lens in which the focal point F _12d is set in the vicinity of the shade 12c (for example, near the center in the left-right direction of the shade 12c) on the surface from which the reflected light RayB traveling toward 12d is emitted (for example, a convex surface convex forward). It is configured as a part. Exit surface 12d is the direct light RayA and reflected light RayB travels toward to the exit surface 12d, the light intensity distribution formed on the focal point F _12d near the exit face 12d (lens unit) a (light source image) inverted projected to Then, a low beam light distribution pattern including a cut-off line at the upper end edge is formed.

Note that by increasing the distance (focal length) between the shade 12c and the exit surface 12d, the light source image becomes smaller than when the distance (focal length) between the shade 12c and the exit surface 12d is shortened. . As a result, the maximum luminous intensity of the luminous intensity distribution (and the low beam light distribution pattern) formed in the vicinity of the focal point F _{12d of} the emission surface 12d (lens portion) can be increased.

  In addition, by shortening the distance between the exit surface 12d and the light source 14 (or shade 12c), the exit surface 12d is longer than when the distance between the exit surface 12d and the light source 14 (or shade 12c) is increased. The direct light RayA and the reflected light B that are taken in are increased. As a result, efficiency increases.

  The degree of diffusion of the low beam light distribution pattern in the horizontal direction and the vertical direction can be freely adjusted by adjusting the surface shape of the exit surface 12d.

  A surface that connects the leading edge of the reflecting surface 12b and the lower edge of the emitting surface 12d is an inclined surface that extends obliquely forward and downward from the leading edge of the reflecting surface 12b. In addition, the surface which connects the front-end edge of the reflective surface 12b and the lower end edge of the output surface 12d is not limited to this, and any surface that does not block the direct light RayA and the reflected light RayB traveling toward the output surface 12d. It may be a surface. Similarly, the surface connecting the upper end edge of the incident surface 12a and the upper end edge of the exit surface 12d is a planar surface extending in the horizontal direction between the upper end edge of the entrance surface 12a and the upper end edge of the exit surface 12d. Has been. The surface connecting the upper end edge of the incident surface 12a and the upper end edge of the output surface 12d is not limited to this, and any surface that does not block the direct light RayA and the reflected light RayB traveling toward the output surface 12d. It may be a surface.

  In the lens body 12 configured as described above, the light that has entered the lens body 12 from the incident surface 12a is condensed toward the second reference axis AX2 toward the shade 12c in the vertical direction as shown in FIG. For example, the light is condensed at the center of the shade 12c). And when the surface shape of the incident surface 12a is comprised as shown in FIG. 5, the light which injected into the lens body inside the incident surface 12a is toward the shade 12c regarding a horizontal direction, as shown in FIG. The light is condensed toward the first reference axis AX1 (for example, condensed at the center of the shade 12c).

As described above, the direct light RayA collected in the vertical direction and the horizontal direction and the reflected light RayB internally reflected by the reflecting surface 12b travel toward the emitting surface 12d and are emitted from the emitting surface 12d. At that time, the side corresponding to the cut-off line defined by the shade 12c is formed at the lower end edge in the vicinity of the focal point F _12d of the exit surface 12d (lens portion) by the direct light RayA and the reflected light RayB traveling toward the exit surface 12d. A luminous intensity distribution (light source image) is formed. Then, the exit surface 12d reversely projects this luminous intensity distribution to form a low beam light distribution pattern P1 including a cut-off line at the upper edge shown in FIG. 11A on the virtual vertical screen.

The low-beam light distribution pattern P1 has a relatively high central luminous intensity and excellent distant visibility. This is because the light source 14 is disposed in the vicinity of the incident surface 12a (in the vicinity of the reference point F) of the lens body 12 in such a posture that the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX2. intensity (luminosity) is high light on axis AX ₁₄ of the light (direct light) is condensed on the second reference axis AX2 closer toward the shade 12c (e.g., condensed at the center of the shade 12c) be due to is there.

  In addition, by adjusting the surface shape (for example, curvature) of the entrance surface 12a and / or the exit surface 12d, as shown in FIG. 11B, a low beam light distribution pattern P2 diffused in the horizontal direction is formed. You can also.

  Further, by increasing the inclination of the second reference axis AX2 (see the angle θ shown in FIG. 1) with respect to the first reference axis AX1, the lower edge of the low beam light distribution patterns P1, P2 can be extended downward.

  On the other hand, when the surface shape of the incident surface 12a is configured as shown in FIG. 6, the light that has entered the lens body 12 from the incident surface 12a has a first reference axis in the horizontal direction as shown in FIG. The light is parallel to AX1.

As described above, the direct light RayA collected in the vertical direction and parallel to the horizontal direction and the reflected light RayB internally reflected by the reflection surface 12b travel toward the emission surface 12d and are emitted from the emission surface 12d. . At that time, the direct light RayA and reflected light RayB traveling toward the exit surface 12d, the focal F _12d near the exit face 12d (lens unit), corresponding to the cutoff line CL1~CL3 defined in the lower edge by the shade 12c A luminous intensity distribution (light source image) including a side to be formed is formed. The exit surface 12d reversely projects this luminous intensity distribution to form a low beam light distribution pattern P3 including cut-off lines CL1 to CL3 at the upper edge shown in FIG. 11C on the virtual vertical screen. The low beam light distribution pattern P3 shown in FIG. 11C is more diffused in the horizontal direction than the low beam light distribution pattern P1 shown in FIG.

  Next, the relationship between the light source image by the light from the light source 14 that has entered the lens body 12 and the low beam light distribution pattern will be described.

  FIG. 12 is a diagram for explaining a light source image by light from the light source 14 in each of the cross sections Cs1 to Cs3.

As shown in FIG. 12, the external shape of the cross section Cs1, the light source image I _Cs1 in Cs2, I _Cs2 becomes the same as the outer shape of the light source (larger as the light source image in the external shape and similar type of light source 14).

On the other hand, the outer shape of the light source image I _Cs3 in section Cs3 after passing through the reflecting surface 12b and the shade 12c includes an edge e1, e2, e3 corresponding to cutoff line CL1~CL3 defined in the lower edge by the shade 12c It will be a thing. This light source image I _Cs3 is inverted by the action of the exit surface 12d (lens portion) and includes edges e1, e2, e3 corresponding to the cut-off lines CL1 to CL3 defined by the shade 12c at the upper end edge.

  The light distribution patterns P1 to P3 for low beams shown in FIGS. 11A to 11C include light sources including sides e1, e2, and e3 corresponding to the cut-off lines CL1 to CL3 defined by the shade 12c at the upper end edge. Since it is formed on the basis of an image, clear cut-off lines CL1, CL2, and CL3 are included at the upper edge.

  Next, the advantage of disposing the reflecting surface 12b with respect to the first reference axis AX1 will be described in comparison with the case where the reflecting surface 12b is disposed in the horizontal direction.

  The first advantage is that stray light can be reduced and efficiency can be increased as compared with the case where the reflecting surface 12b is arranged in the horizontal direction.

  That is, as shown in FIG. 13A, when the reflecting surface 12b is arranged in the horizontal direction, the reflected light RayB ′ internally reflected by the reflecting surface 12b travels in the direction not entering the exit surface 12d. It becomes. As a result, efficiency is reduced.

  On the other hand, as shown in FIG. 13B, when the reflecting surface 12b is inclined with respect to the first reference axis AX1, the reflection is reflected from the reflecting surface 12b and proceeds toward the emitting surface 12d. The light RayB increases, and the light captured by the emission surface 12d (the reflected light reflected from the inner surface by the reflection surface 12b) increases. As a result, the stray light can be reduced and the efficiency can be increased as compared with the case where the reflecting surface 12b is arranged in the horizontal direction.

  In the simulation performed by the inventors of the present application, the efficiency increases by 33.8% when the reflecting surface 12b is tilted by 5 ° with respect to the first reference axis AX1, and the efficiency increases when the reflecting surface 12b is tilted by 10 °. Increased by 60%.

  The second advantage is that the lens body 12 can be reduced in size as compared with the case where the reflecting surface 12b is arranged in the horizontal direction.

  That is, as shown in FIG. 13A, when the reflecting surface 12b is arranged in the horizontal direction, the reflected light RayB ′ internally reflected by the reflecting surface 12b travels in the direction not entering the exit surface 12d. It becomes. The exit surface 12d can capture stray light RayB 'by extending it upward as shown in FIG. 14 (a), but the exit surface 12d becomes larger as it extends upward.

  On the other hand, as shown in FIG. 14B, when the reflecting surface 12b is inclined with respect to the first reference axis AX1, the exit surface 12d has more light (without extending it upward). The reflected light RayB) internally reflected by the reflecting surface 12b can be taken in. As a result, as compared with the case where the reflecting surface 12b is arranged in the horizontal direction, it is possible to reduce the size of the exit surface 12d (and thus the lens body 12).

  In the simulation performed by the inventors of the present application, when the reflecting surface 12b is inclined at 5 ° with respect to the first reference axis AX1, the height A (light emitted from the emitting surface 12d) shown in FIG. 14 (a) is reduced by 8% compared to the case shown in FIG. 14 (a), and the height A shown in FIG. 14 (b) is shown in FIG. Compared to the case shown, it decreased by 18.1%.

  Next, the second reference axis AX2 is arranged so as to be inclined with respect to the first reference axis AX1, and the light from the light source 14 incident on the lens body 12 enters the second reference axis toward the shade 12c at least in the vertical direction. Regarding the advantage of condensing near AX2, the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the inside of the lens body 12 is directed to the shade 12c at least in the vertical direction. The description will be made in comparison with the case where light is condensed near the axis AX2.

  The advantage is that the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is condensed toward the second reference axis AX2 toward the shade 12c at least in the vertical direction. Compared to the case, the stray light can be reduced and the efficiency can be increased.

  That is, as shown in FIG. 15A, the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is secondly directed toward the shade 12c at least in the vertical direction. When the light is condensed near the reference axis AX2, much of the light from the light source 14 that has entered the lens body 12 is blocked by the shade 12c. As a result, efficiency is greatly reduced. Further, in FIG. 15A, assuming that a reflecting surface corresponding to the reflecting surface 12b is added, the reflected light that is internally reflected by the reflecting surface becomes stray light that travels in a direction not incident on the exit surface 12d.

  On the other hand, as shown in FIG. 15B, the second reference axis AX2 is inclined with respect to the first reference axis AX1, and the light from the light source 14 incident on the lens body 12 is at least vertically. Regarding the direction, when the light is condensed toward the second reference axis AX2 toward the shade 12c, the light captured by the exit surface 12d (the reflected light RayB internally reflected by the reflective surface 12b) increases. As a result, the second reference axis AX2 is arranged in the horizontal direction, and the light from the light source 14 incident on the lens body 12 is condensed toward the second reference axis AX2 toward the shade 12c at least in the vertical direction. Compared to the above, it is possible to reduce stray light and achieve high efficiency.

  As described above, according to the present embodiment, firstly, it is possible to provide the lens body 12 and the vehicle lamp 10 using the lens body 12 in which the reflective surface by metal vapor deposition that causes a cost increase is omitted. Second, the lens body 12 that can prevent the lens body 12 from melting or the output of the light source 14 from being lowered due to the heat generated in the light source 14 and a vehicle lamp 10 using the lens body 12 are provided. can do.

  The reason why the reflective surface by metal vapor deposition, which causes an increase in cost, can be omitted is that the light from the light source 14 is not reflected by the metal vapor deposition, but by refraction at the incident surface 12a and internal reflection at the reflective surface 12b. It is by being controlled.

  The reason why the lens body 12 can be prevented from melting or the output of the light source 14 from being lowered due to the heat generated by the light source 14 is that the incident surface 12a is formed at the rear end of the lens body 12. This is because the light source 14 is disposed outside the lens body 12 (that is, at a position separated from the incident surface 12a of the lens body 12).

  Next, a vehicular lamp that is a second embodiment of the present invention will be described with reference to the drawings.

  16 is a perspective view of a vehicular lamp 10A according to a second embodiment of the present invention, FIG. 17A is a longitudinal sectional view, and FIG. 17B is a state in which light from the light source 14 travels inside the lens body 12A. FIG.

  When comparing the vehicular lamp 10A of the present embodiment with the vehicular lamp 10 of the first embodiment, they are mainly different in the following points.

  First, in the vehicular lamp 10 according to the first embodiment, the light exit surface 12d, which is the final light exit surface of the lens body 12, is mainly responsible for horizontal light collection and vertical light collection. On the other hand, in the vehicular lamp 10A of the present embodiment, the first light exit surface 12A1a of the first lens portion 12A1 is mainly responsible for the horizontal light collection, and the vertical light collection is mainly the lens body 12A. The second emission surface 12A2b of the second lens portion 12A2, which is the final emission surface, is in charge. That is, the vehicle lamp 10A of the present embodiment adopts the concept of “decomposing the light collecting function”.

  Secondly, in the vehicular lamp 10 according to the first embodiment, the light exit surface 12d, which is the final light exit surface of the lens body 12, is hemispherical in order to perform horizontal light collection and vertical light collection. (Refer to FIG. 2 (a)), the vehicular lamp 10A according to the present embodiment is in charge of condensing in the horizontal direction. The first light exit surface 12A1a of the lens portion 12A1 is configured as a semi-cylindrical surface (semi-cylindrical refractive surface) extending in the vertical direction (see FIG. 23), and is in charge of condensing light in the vertical direction. The second exit surface 12A2b of the second lens portion 12A2, which is the final exit surface of 12A, is configured as a semi-cylindrical surface (semi-cylindrical refractive surface) extending in the horizontal direction (see FIG. 23).

  Third, in the vehicular lamp 10 according to the first embodiment, the exit surface 12d, which is the final exit surface of the lens body 12, is configured as a hemispherical surface (semi-columnar refractive surface). Even if a plurality of vehicle lamps 10 (a plurality of lens bodies 12) are arranged in a line (see FIG. 18), the appearance of the dots is continuous, and the vehicle lamp has a sense of unity that extends in a line in a predetermined direction. On the other hand, in the vehicular lamp 10A of the present embodiment, the second exit surface 12A2b, which is the final exit surface of the lens body 12A, extends in the horizontal direction. As a result of being configured as a columnar surface (semi-columnar refractive surface), a plurality of vehicle lamps 10A (a plurality of lens bodies 12A) are arranged in a row (see FIGS. 19A and 19B). In the horizontal direction That it can be configured in appearance with a sense of unity vehicle lamp (lens conjugate 16). FIG. 18 is a top view showing a state in which a plurality of vehicle lamps 10 (a plurality of lens bodies 12) of the first embodiment are arranged in a line.

  Other than that, it is the structure similar to the vehicle lamp 10 of the said 1st Embodiment. Hereinafter, the difference from the vehicular lamp 10 of the first embodiment will be mainly described, and the same components as those of the vehicular lamp 10 of the first embodiment will be denoted by the same reference numerals and description thereof will be omitted. .

  As shown in FIGS. 16 and 17B, the vehicular lamp 10A according to the present embodiment includes a light source 14, a first lens unit 12A1, and a second lens unit 12A2, and the light from the light source 14 is converted into the first lens. After being incident on the inside of the first lens portion 12A1 from the first incident surface 12a of the portion 12A1 and partially shielded by the shade 12c of the first lens portion 12A1, the light is emitted from the first emission surface 12A1a of the first lens portion 12A1, Further, the light enters the second lens portion 12A2 from the second entrance surface 12A2a of the second lens portion 12A2, exits from the second exit surface 12A2b of the second lens portion 12A2, and irradiates forward to the front of the vehicle. Cut-off defined by shade 12c at the upper edge shown in FIG. 20 (a) on a virtual vertical screen (located approximately 25m ahead from the front of the vehicle) It is configured as a vehicular headlamp provided with the configured lens body 12A so as to form a (corresponding to the predetermined light distribution pattern of the present invention) light distribution pattern P1a like low-beam comprising in CL1 to CL3.

  FIG. 21A is a top view of the lens body 12A of the second embodiment, FIG. 21B is a side view, and FIG. 21C is a bottom view. FIG. 22 shows an example (cross-sectional view) of the first incident surface 12a, and FIG. 23 illustrates the lens body 12A (first emission surface 12A1a, second incidence surface 12A2a, and second emission surface 12A2b) of the second embodiment. FIG.

  As shown in FIGS. 17A and 21A to 21C, the lens body 12A is a lens body having a shape extending along a first reference axis AX extending in the horizontal direction. Part 12A1, second lens part 12A2, and connecting part 12A3 connecting first lens part 12A1 and second lens part 12A2.

  The first lens unit 12A1 includes a first incident surface 12a, a reflecting surface 12b, a shade 12c, a first emitting surface 12A1a, and a reference point F in optical design disposed in the vicinity of the first incident surface 12a. The second lens portion 12A2 includes a second entrance surface 12A2a and a second exit surface 12A2b. The first entrance surface 12a, the reflection surface 12b, the shade 12c, the first exit surface 12A1a, the second entrance surface 12A2a, and the second exit surface 12A2b are arranged in this order along the first reference axis AX1.

  The first lens unit 12A1 and the second lens unit 12A2 are coupled by a coupling unit 12A3.

  The connecting portion 12A3 is such that the first lens portion 12A1 and the second lens portion 12A2 are surrounded by the first exit surface 12A1a, the second incident surface 12A2a, and the connecting portion 12A3 (the other portions are opened). The space S is connected in a formed state.

  The lens body 12A is integrally molded by injecting a transparent resin such as polycarbonate or acrylic into a mold, and cooling and solidifying (by injection molding).

  The space S is formed by a mold having a pulling direction opposite to the connecting portion 12A3 (see an arrow in FIG. 17A). In order to smoothly remove the mold, the first exit surface 12A1a and the second entrance surface 12A2a are set with draft angles α and β (also referred to as draft angle, preferably 2 ° or more). Accordingly, it is possible to perform die cutting by upper and lower punching at the time of molding, and the lens body 12 (and a lens coupling body 16 described later) can be manufactured at a low cost by one die cutting (without using a slide). The material of the lens body 12A may be a glass other than a transparent resin such as polycarbonate or acrylic.

The first incident surface 12a is formed at the rear end of the first lens portion 12A1, and light from the light source 14 (precisely, the reference point F in optical design) disposed in the vicinity of the first incident surface 12a is received. The light from the light source 14 that is refracted and incident on the inside of the first lens unit 12A1 (for example, a free curved surface convex toward the light source 14) and incident on the inside of the first lens unit 12A1 relates to the shade 12c in the vertical direction. Toward the second reference axis AX2 (see FIG. 17B), and in the horizontal direction toward the shade 12c toward the first reference axis AX1 (see FIG. 22). The surface shape is configured. The first reference axis AX passes through a point (for example, a focal point F _12A4 ) near the shade 12c and extends in the vehicle front-rear direction. The second reference axis AX2 passes through the center of the light source 14 (more precisely, the reference point F) and a point in the vicinity of the shade 12c (for example, the focal point F _12A4 ), and obliquely forward with respect to the first reference axis AX1. Inclined downward. Note that the first incident surface 12a is such that the light from the light source 14 that has entered the first lens portion 12A1 is parallel to the reference axis AX1 in the horizontal direction (see FIG. 6). The shape may be configured.

  The first emission surface 12A1a travels toward the first emission surface 12A1a out of the light from the light source 14 emitted from the first emission surface 12A1a, that is, the light from the light source 14 incident on the first lens portion 12A1. This is a surface that condenses the reflected light that travels toward the first emission surface 12A1a after being internally reflected by the direct light and the reflection surface 12b in the horizontal direction (corresponding to the first direction of the present invention). Specifically, as shown in FIG. 23, the cylindrical axis is configured as a semi-cylindrical surface extending in the vertical direction. The focal line of the first emission surface 12A1a extends in the vertical direction in the vicinity of the shade 12c.

  The second entrance surface 12A2a is formed at the rear end portion of the second lens portion 12A2, and is a surface on which light from the light source 14 emitted from the first exit surface 12A1a enters the second lens portion 12A2, and has a planar shape, for example. It is configured as a surface. Of course, the present invention is not limited to this, and the second incident surface 12A2a may be configured as a curved surface.

  The second emission surface 12A2b is a surface that condenses light from the light source 14 emitted from the second emission surface 12A2b in the vertical direction (corresponding to the second direction of the present invention). Specifically, as shown in FIG. 23, the cylindrical axis is configured as a semi-cylindrical surface extending in the horizontal direction. The focal line of the second exit surface 12A2b extends in the horizontal direction in the vicinity of the shade 12c.

The focal point F _{12A4 of the} lens 12A4 composed of the first emission surface 12A1a and the second lens portion 12A2 (second incidence surface 12A2a and second emission surface 12A2b) having the above _{configuration} is the focal point F _12d of the emission surface 12d of the first embodiment. In the same manner as above, it is set near the shade 12c (for example, near the center in the left-right direction of the shade 12c). This lens 12A4 is similar to the light exit surface 12d of the first embodiment, out of the light from the light source 14 that has entered the first lens portion 12A1, that is, the light from the light source 14 that has entered the first lens portion 12A1. Luminous intensity formed in the vicinity of the focal point F _{12A4 of the} lens 12A4 by the direct light traveling toward the first emission surface 12A1a and the reflected light traveling toward the first emission surface 12A1a after being internally reflected by the reflection surface 12b. The distribution (light source image) is reversely projected to form a low beam light distribution pattern P1a including cut-off lines CL1 to CL3 on the upper edge shown in FIG. 20A on the virtual vertical screen.

  The basic surface shape of the second exit surface 12A2b is as described above, but since the draft angles α and β are set in the first exit surface 12A1a and the second entrance surface 12A2a, Have been adjusted so that.

  FIG. 24 is a diagram for explaining normal lines of the first exit surface 12A1a, the second entrance surface 12A2a, and the second exit surface 12A2b.

That is, when the extraction angles α and β are set in the first exit surface 12A1a and the second entrance surface 12A2a, as shown in FIG. 24, the method passes through the centers of the first exit surface 12A1a and the second entrance surface 12A2a. The lines N _12A1a and N _12A2a are inclined with respect to the horizontal. In this case, when the normal line N _12A2b passing through the center of the second emission surface 12A2b extends in the horizontal direction, the light from the light source 14 emitted from the second emission surface 12A2b travels obliquely upward with respect to the horizontal. And may cause glare.

In order to suppress this, the surface shape of the second emission surface 12A2b is adjusted so that light from the light source 14 emitted from the second emission surface 12A2b becomes light parallel to the first reference axis AX1. ing. For example, the normal line N _{12A2b of} the second emission surface 12A2b is obliquely upward and forward so that the light from the light source 14 emitted from the second emission surface 12A2b is parallel to the first reference axis AX1. The surface shape is adjusted to be inclined toward the surface. This adjustment is finally adjusted to adjust the focus F _{12A4 of the} lens 12A4 including the first exit surface 12A1a and the second lens portion 12A2 (the second entrance surface 12A2a and the second exit surface 12A2b) near the position of the shade 12c. It is. A line with an arrow at the tip in FIG. 24 represents an optical path of light from the light source 14 (more precisely, the reference point F) incident on the lens body 12A.

  The surface connecting the leading edge of the reflecting surface 12b and the lower end edge of the first emitting surface 12A1a is an inclined surface extending obliquely forward and downward from the leading edge of the reflecting surface 12b. Any surface may be used as long as it does not block light from the light source 14 traveling toward the second emission surface 12A2b. Similarly, the upper surface of the lens body 12A, that is, the surface connecting the upper end edge of the first entrance surface 12a and the upper end edge of the second exit surface 12A2b is a surface extending in a substantially horizontal direction. Not limited to any surface as long as it does not block the light from the light source 14 traveling toward the second emission surface 12A2b. Similarly, both side surfaces of the lens body 12A, that is, surfaces connecting the left and right end edges of the first entrance surface 12a and the left and right end edges of the second exit surface 12A2b narrow in a tapered shape toward the first entrance surface 12a. The inclined surface (see FIG. 21A) is not limited to this, and may be any surface as long as it does not block the light from the light source 14 traveling toward the second emission surface 12A2b. .

  In the vehicular lamp 10A (lens body 12A) having the above-described configuration, the light from the light source 14 is transmitted from the first incident surface 12a of the first lens unit 12A1 to the inside of the first lens unit 12A1, as shown in FIG. And is partially shielded by the shade 12c of the first lens unit 12A1, and then exits from the first exit surface 12A1a of the first lens unit 12A1. At that time, the light from the light source 14 emitted from the first emission surface 12A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (see FIG. 22. Not condensed or hardly collected in the vertical direction). ). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is condensed in the vertical direction by the action of the second emission surface 12A2b (see FIG. 17B). Not condensed). As described above, the low beam light distribution pattern P1a including the cut-off lines CL1 to CL3 defined by the shade 12c on the upper edge shown in FIG. 20A or the like on the virtual vertical screen (corresponding to the predetermined light distribution pattern of the present invention). ) Is formed.

The low beam light distribution pattern P1a and the like have a relatively high central luminous intensity and are excellent in distance visibility. This is because the light source 14 is disposed in the vicinity of the incident surface 12a (in the vicinity of the reference point F) of the lens body 12A in an attitude in which the optical axis AX ₁₄ of the light source 14 coincides with the second reference axis AX2. intensity (luminosity) is high light on axis AX ₁₄ of the light (direct light) is condensed on the second reference axis AX2 closer toward the shade 12c (e.g., condensed at the center of the shade 12c) be due to is there.

  The degree of diffusion in the horizontal direction and / or the vertical direction of the low beam light distribution pattern is adjusted by adjusting the surface shape (for example, curvature) of the first emission surface 12A1a and / or the second emission surface 12A2b. ) To FIG. 20 (c), and can be freely adjusted. For example, the degree of horizontal diffusion of the low beam light distribution pattern can be freely adjusted by adjusting the surface shape (for example, curvature) of the first emission surface 12A1a. Similarly, the degree of vertical diffusion of the low beam light distribution pattern can be freely adjusted by adjusting the surface shape (for example, curvature) of the second emission surface 12A2b.

  FIG. 19A is a front view showing a state in which a plurality of vehicle lamps 10A (a plurality of lens bodies 12A) of the second embodiment are arranged in a line in the horizontal direction, and FIG. 19B is a top view.

  As shown in FIGS. 19A and 19B, the lens combination 16 includes a plurality of lens bodies 12A. The lens coupling body 16 (the plurality of lens bodies 12A) is integrally molded (injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, and cooling and solidifying. The second exit surfaces 12A2b of each of the plurality of lens bodies 12A are arranged in a row in the horizontal direction in a state of being adjacent to each other, and form a semi-cylindrical exit surface group having a sense of unity extending in a line shape in the horizontal direction. doing.

  By using the lens combined body 16 having the above-described configuration, it is possible to configure a vehicular lamp that looks good with a sense of unity extending in a line shape in the horizontal direction. The lens combination 16 may be formed by molding a plurality of lens bodies 12 in a physically separated state and connecting (holding) them with a holding member (not shown) such as a lens holder.

  As described above, according to the present embodiment, in addition to the effects of the first embodiment, the following effects can be further achieved.

  That is, first, it is possible to provide a lens body 12A (lens coupling body 16) having a sense of unity extending in a line shape in the horizontal direction and a vehicular lamp 10A using the lens body 12A. Second, although the final exit surface, the second exit surface 12A2b, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the horizontal direction), it collects light in the horizontal and vertical directions. The lens body 12A (lens coupling body 16) and the vehicle lamp 10A using the lens body 12A (lens coupling body 16) capable of forming the low beam light distribution pattern P1a and the like can be provided.

  The appearance with a sense of unity extending in a line shape in the horizontal direction is that the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface extending in the horizontal direction). ).

  Even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the horizontal direction), the arrangement for low beam condensed in the horizontal direction and the vertical direction is used. The light pattern P1a and the like can be formed mainly by the first light exit surface 12A1a (a semi-cylindrical refracting surface extending in the vertical direction) of the first lens portion 12A1 for focusing in the horizontal direction. This is because the second light exit surface 12A2b (a semi-cylindrical refracting surface extending in the horizontal direction) of the second lens portion 12A2, which is the final light exit surface of the lens body 12A, is mainly responsible for condensing light in the direction. . That is, it is due to the decomposition of the light collecting function.

  Further, according to the present embodiment, although the extraction angles α and β are set in the first emission surface 12A1a and the second incidence surface 12A2a, the emission is made from the second emission surface 12A2b that is the final emission surface. Provided is a lens body 12A (lens coupling body 16) suitable for a vehicular lamp, and a vehicular lamp 10A using the same, in which light from the light source 14 is parallel to the first reference axis AX1. Can do.

  Next, a modified example will be described.

  FIG. 25 is a diagram illustrating a lens body 12B that is a first modification of the lens body 12A of the second embodiment.

  As shown in FIG. 25, the lens body 12B of this modification is molded in a state where the first lens portion 12A1 and the second lens portion 12A2 are physically separated, and the both are connected by a holding member 18 such as a lens holder. (Holding). The first exit surface 12A1a and the second entrance surface 12A2a are not set with the draft angles α and β, and are plane surfaces (or curved surface shapes) orthogonal to the reference axis AX1, respectively.

  According to this modification, adjustment of the second exit surface 12A2b can be omitted as a result of eliminating the draft angles α and β.

  FIG. 26 is a perspective view for explaining a lens body 12C (first exit surface 12A1a, second entrance surface 12A2a, and second exit surface 12A2b) that is a second modification of the lens body 12A of the second embodiment. is there.

  The lens body 12C of this modification corresponds to a lens body obtained by replacing the first emission surface 12A1a and the second emission surface 12A2b) of the second embodiment.

  That is, the first emission surface 12A1a of the lens body 12C of the present modification is a surface that condenses light from the light source 14 emitted from the first emission surface 12A1a in the vertical direction (corresponding to the first direction of the present invention). is there. Specifically, as shown in FIG. 26, the cylinder axis is configured as a semi-cylindrical surface extending in the horizontal direction. In this case, the focal line of the first emission surface 12A1a extends in the horizontal direction in the vicinity of the shade 12c. Further, the second emission surface 12A2b of the lens body 12C of the present modification is a surface that condenses light from the light source 14 emitted from the second emission surface 12A2b in the horizontal direction (corresponding to the second direction of the present invention). is there. Specifically, as shown in FIG. 26, the cylindrical axis is configured as a semi-cylindrical surface extending in the vertical direction. In this case, the focal line of the second exit surface 12A2b extends in the vertical direction in the vicinity of the shade 12c.

The focal point F _{12A4 of the} lens 12A4 composed of the first exit surface 12A1a and the second lens portion 12A2 (the second entrance surface 12A2a and the second exit surface 12A2b) of the lens body 12C of this modification is the same as in the second embodiment. It is set near the shade 12c (for example, near the center in the left-right direction of the shade 12c).

  FIG. 27 is a front view showing a state in which a plurality of vehicle lamps 10C (a plurality of lens bodies 12C) are arranged in a line in the vertical direction.

  As shown in FIG. 27, the lens combination 16C includes a plurality of lens bodies 12C. The lens coupling body 16C (the plurality of lens bodies 12C) is integrally molded (injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, and cooling and solidifying. The second exit surfaces 12A2b of each of the plurality of lens bodies 12C are arranged in a row in the vertical direction in a state of being adjacent to each other, and form a semi-cylindrical exit surface group having a sense of unity extending in a line shape in the vertical direction. doing.

  By using the lens combined body 16C having the above-described configuration, it is possible to configure the vehicular lamp 10C having a sense of unity extending in a line shape in the vertical direction. The lens combination 16C may be formed by molding the plurality of lens bodies 12C in a physically separated state and connecting (holding) them with a holding member (not shown) such as a lens holder.

  According to this modified example, first, it is possible to provide a lens body 12C (lens coupling body 16C) having a sense of unity extending in a line in the vertical direction and a vehicular lamp 10C using the lens body 12C. Second, although the final emission surface, the second emission surface 12A2b, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the vertical direction), the light is condensed in the horizontal direction and the vertical direction. The lens body 12C (lens coupling body 16C) capable of forming the low beam light distribution pattern P1a and the like, and the vehicular lamp 10C using the lens body 12C can be provided.

  The appearance with a sense of unity extending in a line shape in the vertical direction is that the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface extending in the vertical direction). ).

  Even though the second exit surface 12A2b, which is the final exit surface, is a semi-cylindrical surface (a semi-cylindrical refracting surface extending in the vertical direction), the arrangement for low beams condensed in the horizontal direction and the vertical direction is used. The light pattern P1a and the like can be formed mainly by focusing the light in the vertical direction on the first emission surface 12A1a (a semi-cylindrical refracting surface extending in the horizontal direction) of the first lens portion 12A1, and horizontally. This is because the second light exit surface 12A2b (a semi-cylindrical refracting surface extending in the vertical direction) of the second lens portion 12A2, which is the final light exit surface of the lens body 12A, is mainly responsible for condensing light in the direction. . That is, it is due to the decomposition of the light collecting function.

  The concept of “decomposing the light collecting function” described in the second embodiment is not limited to the vehicular lamp 10 of the first embodiment, and the final emission surface is a hemispherical surface (a hemispherical refractive surface). It can be applied to any vehicular lamp (for example, a vehicular lamp described in JP-A-2005-228502 described in the background art). Hereinafter, this point will be described using the third embodiment and the fourth embodiment.

  Next, as a third embodiment, a direct projection type vehicular lamp 20 to which the concept of “decomposing the light collecting function” described in the second embodiment is applied will be described. Hereinafter, the same components as those of the vehicle lamp 10A of the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 28 is a schematic view of a direct projection type vehicular lamp 20 to which the concept of “disassembling the light collecting function” is applied.

  As shown in FIG. 28, the direct projection type vehicular lamp 20 of the present embodiment includes a light source 14, a shade 22, a first lens unit 12 </ b> A <b> 1, and a second lens unit 12 </ b> A <b> 2, and light from the light source 14 is shaded 22. After being partially shielded by the first lens portion 12A1, the first lens portion 12A1 enters the first lens portion 12A1 from the first incident surface 12A1b, exits from the first exit surface 12A1a of the first lens portion 12A1, and further the second lens. 20A is incident on the inside of the second lens portion 12A2 from the second incident surface 12A2a of the portion 12A2, exits from the second exit surface 12A2b of the second lens portion 12A2, and irradiates forward, so that FIG. (A) Low-beam light distribution pattern P1a including cut-off lines CL1 to CL3 defined by the shade 22 at the upper edge shown in FIG. It is configured as a vehicular headlamp provided with the configured lens body so as to form a (corresponding to the predetermined light distribution pattern of the present invention).

That is, the direct projection type vehicular lamp 20 of the present embodiment uses a convex lens (a convex lens whose final emission surface is a hemispherical surface) used in a general direct projection type vehicular lamp as a first lens. This corresponds to the part replaced with the part 12A1 and the second lens part 12A2. The focal point F _{12A5 of the} lens 12A5 including the first lens portion 12A1 and the second lens portion 12A2 is in the vicinity of the upper edge of the shade 22 disposed in front of the light source 14 so as to cover a part of the light source 14 (light emitting surface). Is set to Unlike the second embodiment, the first incident surface 12A1b has a plane shape (or curved surface shape) perpendicular to the reference axis AX1.

  In the vehicular lamp 20 having the above-described configuration, the light from the light source 14 is partially blocked by the shade 22, and then enters the first lens unit 12A1 from the first incident surface 12A1b of the first lens unit 12A1. The light exits from the first exit surface 12A1a of the one lens portion 12A1. At that time, the light from the light source 14 emitted from the first emission surface 12A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (not condensed or hardly collected in the vertical direction). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is condensed in the vertical direction (not condensed or hardly collected in the horizontal direction) by the action of the second emission surface 12A2b. As described above, on the virtual vertical screen, the low beam light distribution pattern P1a including the cut-off lines CL1 to CL3 defined by the shade 22 at the upper edge shown in FIG. 20A and the like (corresponding to the predetermined light distribution pattern of the present invention) ) Is formed.

28, the shade 22 is omitted and the surfaces 12A1a, 12A1b, 12A2a, and 12A2b are adjusted to form the high beam light distribution pattern P _Hi shown in FIG. 29 on the virtual vertical screen. A lamp can be constructed. In this case, the light from the light source 14 enters the first lens unit 12A1 from the first incident surface 12A1b of the first lens unit 12A1, and exits from the first emission surface 12A1a of the first lens unit 12A1. At that time, the light from the light source 14 emitted from the first emission surface 12A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (not condensed or hardly collected in the vertical direction). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is condensed in the vertical direction by the action of the second emission surface 12A2b (not collected or hardly collected in the horizontal direction). Thus, the high beam light distribution pattern P _Hi illustrated in FIG. 29 is formed on the virtual vertical screen. FIG. 29 is an example of a high beam light distribution pattern P _Hi formed on a virtual vertical screen (disposed approximately 25 m forward from the front of the vehicle) facing the front of the vehicle.

  Next, as a fourth embodiment, a projector-type vehicular lamp 30 to which the concept of “disassembling the light collecting function” described in the second embodiment will be described. Hereinafter, the same components as those of the vehicle lamp 10A of the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 30 is a schematic diagram of a projector-type vehicular lamp 30 to which the above-described concept of “decomposing the light collecting function” is applied.

  As shown in FIG. 30, the projector-type vehicular lamp 30 according to the present embodiment includes a light source 14, a reflector 32 (elliptic reflecting surface), a shade 34, a first lens unit 12A1, and a second lens unit 12A2. After the light from 14 is reflected by the reflector 32 and partially blocked by the shade 34, the light enters the first lens unit 12A1 from the first incident surface 12A1b of the first lens unit 12A1 and enters the first lens unit 12A1. The light exits from the first exit surface 12A1a, further enters the second lens portion 12A2 from the second entrance surface 12A2a of the second lens portion 12A2, exits from the second exit surface 12A2b of the second lens portion 12A2, and forwards. As a result of the irradiation, the lobby including the cut-off lines CL1 to CL3 defined by the shade 34 at the upper end edge on the virtual vertical screen. Beam light distribution pattern P1a or the like is configured as a vehicular headlamp provided with the configured lens body so as to form a (corresponding to the predetermined light distribution pattern of the present invention).

That is, the projector-type vehicular lamp 30 of the present embodiment includes a convex lens (a convex lens whose final emission surface is a hemispherical surface) used in a general projector-type vehicular lamp, and the first lens portion 12A1. This corresponds to the replacement with the second lens portion 12A2. The shade 34 is configured as a mirror surface extending substantially horizontally from the vicinity of the focal point F _{12A5 of the} lens 12A5 including the first lens portion 12A1 and the second lens portion 12A2 toward the rear. The focal point F _{12A5 of the} lens 12A5 including the first lens portion 12A1 and the second lens portion 12A2 is set in the vicinity of the tip edge of the shade 34. The first focal point F1 of the reflector 32 (elliptic reflecting surface) is set near the light source 14, and the second focal point F2 is the focal point F _{12A5 of the} lens 12A5 including the first lens unit 12A1 and the second lens unit 12A2. It is almost coincident. Unlike the second embodiment, the first incident surface 12A1b has a plane shape (or curved surface shape) perpendicular to the reference axis AX1.

  In the vehicular lamp 30 configured as described above, the light from the light source 14 is reflected by the reflector 32 and partially shielded by the shade 34, and then from the first incident surface 12A1b of the first lens unit 12A1 to the first lens unit 12A1. The light enters the inside and exits from the first exit surface 12A1a of the first lens portion 12A1. At that time, the light from the light source 14 emitted from the first emission surface 12A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (not condensed or hardly collected in the vertical direction). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is condensed in the vertical direction (not condensed or hardly collected in the horizontal direction) by the action of the second emission surface 12A2b. As described above, on the virtual vertical screen, the low beam light distribution pattern P1a including the cut-off lines CL1 to CL3 defined by the shade 34 at the upper edge shown in FIG. 20A and the like (corresponding to the predetermined light distribution pattern of the present invention). ) Is formed.

In addition, the vehicle which forms the high beam light distribution pattern P _Hi shown in FIG. 29 on the virtual vertical screen by omitting the shade 34 from the configuration shown in FIG. 30 and adjusting the reflector 32 (elliptic reflection surface) or the like. A headlamp can be configured. In this case, the light from the light source 14 is reflected by the reflector 32, enters the first lens unit 12A1 from the first incident surface 12A1b of the first lens unit 12A1, and enters the first lens unit 12A1 from the first emission surface 12A1a. Exit. At that time, the light from the light source 14 emitted from the first emission surface 12A1a is condensed in the horizontal direction by the action of the first emission surface 12A1a (not condensed or hardly collected in the vertical direction). Then, the light from the light source 14 emitted from the first emission surface 12A1a passes through the space S, and further enters the second lens unit 12A2 from the second incident surface 12A2a of the second lens unit 12A2. The light exits from the second exit surface 12A2b of the lens portion 12A2 and is irradiated forward. At that time, the light from the light source 14 emitted from the second emission surface 12A2b is condensed in the vertical direction by the action of the second emission surface 12A2b (not collected or hardly collected in the horizontal direction). Thus, the high beam light distribution pattern P _Hi illustrated in FIG. 29 is formed on the virtual vertical screen.

  Next, as a fifth embodiment, a vehicle lamp 10D provided with a camber angle will be described with reference to the drawings.

  FIG. 31 (a) is a side view of the vehicular lamp 10D with a camber angle (only the main optical surface), FIG. 31 (b) is a top view (only the main optical surface), and FIG. 31 (c) is a vehicular lamp. It is an example of the light distribution pattern for low beams formed by 10D. 31 (d) to 31 (f) are comparative examples, and FIG. 31 (d) is a side view of the vehicular lamp 10A according to the second embodiment in which a camber angle is not given (only the main optical surface), FIG. (E) is a top view (only the main optical surface), and FIG. 31 (f) is an example of a low beam light distribution pattern formed by the vehicle lamp 10A of the second embodiment. FIG. 32 is a top view (only the main optical surface) for explaining a problem when the camber angle is given.

  As shown in FIG. 31 (b), the vehicular lamp 10D of the present embodiment is configured so that the second lens portion 12A2 of the vehicular lamp 10A of the second embodiment is in a top view with respect to the first reference axis AX1. The inclined surface, that is, the second emission surface 12A2b of the vehicle lamp 10A of the second embodiment is a semi-cylindrical surface extending in a direction inclined by a predetermined angle with respect to the first reference axis AX1 when viewed from above. This corresponds to a configuration (that is, a camber angle θ1 (for example, θ1 = 30 °)).

As a result of a simulation confirmed by the present inventors, when only the camber angle θ1 is given, as shown in FIG. 32, the distance between the first exit surface 12A1a and the second entrance surface 12A2a is set to the first reference axis AX1. On both sides (see arrows B and C in FIG. 32), the focal position F _{B of the} light emitted from the B position of the first emission surface 12A1a and the focal position F _{C of the} light emitted from the C position are greatly shifted. As a result, as shown in FIG. 33, the side where the distance between the first exit surface 12A1a and the second entrance surface 12A2a is widened in the low beam distribution pattern formed on the virtual vertical screen (the right side in FIG. 33). ) Was found to be out of focus without condensing.

  The cause of this blurring will be described as follows with reference to the drawings.

34A is a cross-sectional view at the position B shown in FIG. 32 (only the main optical surface), and the line with an arrow at the tip in FIG. 34A is relative to the first emission surface 12A1a (position B). light RAY1 _B at an incident angle with Te represents the optical path to follow. FIG. 34B is a cross-sectional view at the position C shown in FIG. 32 (only the main optical surface). A line with an arrow at the tip in FIG. 34B is relative to the first emission surface 12A1a (position C). This represents the optical path followed by the light Ray1 _C incident at the same incident angle as shown in FIG. For convenience of explanation, in FIGS. 34 (a) and 34 (b), the first exit surface 12A1a and the second entrance surface 12A2a are drawn with no draft angle set. The same applies when it is set.

  As shown in FIG. 34 (b), at the position C, the distance between the first exit surface 12A1a and the second entrance surface 12A2a is wider than at the position B (see FIG. 34 (a)). Therefore, the incident position of the light Ray1C with respect to the second incident surface 12A2a is lower than the incident position of the light Ray1B with respect to the second incident surface 12A2a shown in FIG. 34A, and the light Ray1C incident from this lower incident position is shown in FIG. As shown in (b), it goes upwards with respect to the horizontal. As a result, the blur occurs.

  As a result of diligent studies to improve the blur, the present inventors have improved the blur by adjusting the surface shape of the first emission surface 12A1a, and the light distribution pattern for low beam is totally condensed. (See FIG. 31 (c)).

  Based on this knowledge, the first emission surface 12A1a of the present embodiment is a semi-cylindrical surface extending in the vertical direction, and the low beam light distribution pattern is entirely condensed (see FIG. 31C). The surface shape is adjusted as follows. This adjustment is an adjustment for adjusting the shifted focal positions FB, FC, etc. near the position of the shade 12c, and is performed using predetermined simulation software. 35A is a perspective view of the vehicular lamp 10D of the fifth embodiment (only the main optical surface), and FIG. 35B is a comparative example, and is a perspective view of the vehicular lamp 10A of the second embodiment (main optical). Surface only). Referring to FIG. 35 (a), it can be seen that the first exit surface 12A1a of the present embodiment adjusted as described above has an asymmetric shape with respect to the reference axis AX1.

  The vehicular lamp 10D of the present embodiment has the same configuration as the vehicular lamp 10A of the second embodiment except for the above points.

  According to this embodiment, in addition to the effects of the second embodiment, the following effects can be further achieved.

  That is, firstly, it is possible to provide a new-looking lens body (lens combined body) provided with a camber angle and a vehicle lamp using the lens body. That is, it is possible to provide an excellent-looking lens body (lens combined body) that extends in a line shape in a direction inclined by a predetermined angle with respect to the first reference axis AX1 in a top view, and a vehicle lamp using the lens body. it can. Second, the light distribution for low beam condensed in the horizontal direction and the vertical direction even though the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface). A lens body (lens combined body) capable of forming a pattern and a vehicular lamp using the lens body can be provided. Thirdly, it is possible to provide a lens body (lens combined body) in which the low-beam light distribution pattern is entirely collected despite the camber angle being provided, and a vehicular lamp using the lens body.

  The second output surface 12A2b, which is the final output surface, has a semi-cylindrical surface (line shape) extending in a line shape in a direction inclined by a predetermined angle with respect to the first reference axis AX1. This is because the second exit surface 12A2b extends in a direction inclined with respect to the first reference axis AX1 when viewed from above.

  Even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface), a light distribution pattern for low beam condensed in the horizontal direction and the vertical direction is formed. The first light exit surface 12A1a (semi-cylindrical refracting surface) of the first lens portion 12A1 is mainly responsible for the light collection in the horizontal direction, and the light collection in the vertical direction is mainly performed at the final position of the lens body 12A. This is because the second exit surface 12A2b (semi-cylindrical refracting surface) of the second lens portion 12A2, which is a typical exit surface, is in charge. That is, it is due to the decomposition of the light collecting function.

  Although the camber angle is given, the light distribution pattern for the low beam is totally collected by the first emission surface 12A1a having a semi-cylindrical surface extending in the vertical direction. This is because the surface shape is adjusted so that the light distribution pattern is totally condensed.

  Note that the concept of “giving a camber angle” described in the present embodiment and the idea of improving the blur caused by the provision of the camber angle as described above are for the vehicle of the second embodiment. The present invention is not limited to the lamp 10A (lens body 12A), but can also be applied to the respective modifications, the vehicle lamp (lens body) of the third and fourth embodiments, and the like. Similarly, the present invention can be applied to a vehicular lamp 10J (lens body 12J) of a tenth embodiment described later.

  Next, as a sixth embodiment, a vehicle lamp 10E provided with a slant angle will be described with reference to the drawings.

  FIG. 36 is a front view of the vehicular lamp 10E with a slant angle.

  As shown in FIG. 36, the vehicular lamp 10E of the present embodiment is obtained by tilting the second lens portion 12A2 of the vehicular lamp 10A of the second embodiment with respect to the horizontal in a front view, that is, the above-described The second emission surface 12A2b of the vehicular lamp 10A of the second embodiment is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the horizontal (ie, a slant angle θ2 ( For example, it is equivalent to that given θ2 = 12 °). Specifically, the second lens portion 12A2 (second emission surface 12A2b) of the present embodiment is centered on the first reference axis AX1 with the second lens portion 12A2 (second emission surface 12A2b) of the second embodiment. Corresponds to a rotation of a predetermined angle θ2.

  As a result of a simulation confirmed by the present inventors, only by providing the slant angle θ2, the focal line of the second lens portion 12A2 is inclined with respect to the shade 12c, and as a result, as shown in FIGS. 37 (a) and 37 (b). Thus, it was found that the low beam light distribution pattern formed on the virtual vertical screen is in a rotated state (or can be said to be out of focus). FIG. 37A is a diagram for explaining problems that appear in the low beam light distribution pattern when a slant angle is given, and FIG. 37B is a diagram schematically showing FIG. 37A.

  As a result of intensive studies to suppress this rotation (or a blurred state), the present inventors have determined that the first emission surface 12A1a has a predetermined angle θ2 with respect to the vertical in front view as shown in FIG. It is configured as a semi-cylindrical surface extending in an inclined direction, and the reflection surface 12b and the shade 12c are at a predetermined angle in a direction opposite to the second emission surface 12A2b and the first emission surface 12A1a with respect to the horizontal in a front view. It has been found that the rotation is suppressed by arranging in a posture inclined by θ2 (see FIGS. 38A and 38B). FIG. 38A is a diagram for explaining that the problem (rotation) appearing in the low beam light distribution pattern is suppressed, and FIG. 38B is a diagram schematically showing FIG. 38A. .

  The reason why the rotation (or blurred state) is suppressed will be described as follows with reference to the drawings.

  52A is a side view of the vehicular lamp 10E (lens body 12A) of the present embodiment (only the main optical surface from which the first emission surface 12A1a is omitted), and FIG. 52B is a top view (first emission surface). 12A1a is the main optical surface only), and each represents the optical path (that is, the result of the reverse ray tracing) followed by the parallel ray RayAA that has entered the lens body 12A from the second emission surface 12A2b.

  FIG. 52 (d) is a side view of the vehicular lamp 10E (lens body 12A) of the present embodiment (only the main optical surface from which the first emission surface 12A1a is omitted), and FIG. 52 (e) is a top view (first emission surface). 12A1a (only the main optical surface is omitted), each represents an optical path (that is, a result of reverse ray tracing) followed by the parallel ray RayBB incident on the inside of the lens body 12A from the second emission surface 12A2b.

52A to 52D, the second lens portion 12A2 is given a slant angle θ2 (= 10 °), and the focal line of the second lens portion 12A2 is slanted with respect to the horizontal. It is inclined by an angle θ2. As a result, the focal point F _BB in FIG. 52 (c) is located higher than the focal point F _AA in FIG. 52 (a).

  Next, considering the optical path followed by the parallel rays RayAA and RayBB when the first emission surface 12A1a is disposed, this optical path is as shown in FIGS. 53 (a) and 53 (b).

  FIG. 53A is a top view in which the first emission surface 12A1a is added to FIG. 52B, and the optical path followed by the parallel ray RayAA incident on the lens body 12A from the second emission surface 12A2b (that is, the result of the reverse ray tracing). ). FIG. 53 (b) is a top view obtained by adding the first emission surface 12A1a to FIG. 52 (d), and the optical path followed by the parallel ray RayBB incident on the inside of the lens body 12A from the second emission surface 12A2b (that is, the result of the reverse ray tracing). ).

When the slant angle θ2 (= 10 °) is given to the first emission surface 12A1a (that is, the first emission surface 12A1a is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical. The component having a low focal point F _AA (that is, RayAA) is refracted by the action of the first emission surface 12A1a and travels to the opposite side to form a focal point, as shown in FIG. 53 (a). On the other hand, the component having a high focal point F _BB (that is, RayBB) is refracted by the action of the first emission surface 12A1a and travels to the opposite side, as shown in FIG. As a result, the focal line is inclined in the direction opposite to the slant direction.

  Therefore, in order to make the shade 12c coincide (substantially coincide) with the focal line inclined opposite to the slant direction, the second emission surface 12A2b and the first emission surface of the reflection surface 12b and the shade 12c are horizontal with respect to the front view. It is arranged in a posture inclined by a predetermined angle θ2 in the opposite direction to the surface 12A1a. As a result, the shade 12c coincides (substantially coincides) with the focal line inclined opposite to the slant direction, and the rotation (or blurred state) is suppressed.

  Based on the above knowledge, the first emission surface 12A1a of the present embodiment is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical in a front view. Specifically, the first emission surface 12A1a of the present embodiment rotates the first emission surface 12A1a of the second embodiment by a predetermined angle θ2 around the first reference axis AX1 in the same direction as the second emission surface 12A2b. It corresponds to that.

  In addition, the reflection surface 12b and the shade 12c are arranged in a posture inclined at a predetermined angle θ2 in the opposite direction to the second emission surface 12A2b and the first emission surface 12A1a with respect to the horizontal in a front view. Specifically, the reflecting surface 12b and the shade 12c of this embodiment are different from the reflecting surface 12b and the shade 12c of the second embodiment with the second emitting surface 12A2b and the first emitting surface 12A1a around the first reference axis AX1. This corresponds to a rotation of a predetermined angle θ2 in the reverse direction.

  The vehicular lamp 10E of the present embodiment has the same configuration as the vehicular lamp 10A of the second embodiment, except for the above points.

  According to this embodiment, in addition to the effects of the second embodiment, the following effects can be further achieved.

  That is, firstly, it is possible to provide a new-looking lens body (lens combined body) having a slant angle and a vehicle lamp using the lens body. That is, it is possible to provide an attractive lens body (lens combined body) having a sense of unity extending in a line shape in a direction inclined by a predetermined angle with respect to the horizontal when viewed from the front, and a vehicle lamp using the lens body. Second, the light distribution for low beam condensed in the horizontal direction and the vertical direction even though the second emission surface 12A2b which is the final emission surface is a semi-cylindrical surface (a semi-cylindrical refractive surface). A lens body (lens combined body) capable of forming a pattern and a vehicular lamp using the lens body can be provided. 3rdly, although the slant angle | corner is provided, the lens body (lens coupling body) by which rotation of the light distribution pattern for low beams is suppressed, and a vehicle lamp using the same can be provided.

  The appearance with a sense of unity extending in a line shape in a direction tilted by a predetermined angle with respect to the horizontal is that the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical shape). This is because the second emission surface 12A2b extends in a direction inclined with respect to the horizontal in a front view.

  Even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface (a semi-cylindrical refractive surface), a light distribution pattern for low beam condensed in the horizontal direction and the vertical direction is formed. The first light exit surface 12A1a (semi-cylindrical refracting surface) of the first lens portion 12A1 is mainly responsible for the light collection in the horizontal direction, and the light collection in the vertical direction is mainly performed at the final position of the lens body 12A. This is because the second exit surface 12A2b (semi-cylindrical refracting surface) of the second lens portion 12A2, which is a typical exit surface, is in charge. That is, it is due to the decomposition of the light collecting function.

  Although the slant angle is given, the rotation of the light distribution pattern for the low beam is suppressed because the first emission surface 12A1a extends in a direction inclined by a predetermined angle with respect to the vertical in front view. It is a cylindrical surface, and the shade 12c (and the reflection surface 12b) is arranged in a posture inclined at a predetermined angle in the opposite direction to the second emission surface 12A2b and the first emission surface 12A1a with respect to the horizontal in a front view. It is because it is.

  The concept of “giving a slant angle” described in the present embodiment and the idea of suppressing the rotation generated with the grant of the slant angle as described above are for the vehicle of the second embodiment. The present invention is not limited to the lamp 10A (lens body 12A), but can also be applied to the respective modifications, the vehicular lamp (lens body) of the third and fourth embodiments, and the like. Similarly, the present invention can be applied to a vehicular lamp 10J (lens body 12J) of a tenth embodiment described later.

  Next, as a seventh embodiment, a vehicle lamp 10F provided with a camber angle and a slant angle will be described with reference to the drawings.

  39A is a side view of the vehicular lamp 10F provided with a camber angle and a slant angle (only the main optical surface), FIG. 39B is a top view (only the main optical surface), and FIG. It is an example of the light distribution pattern for low beams formed by the vehicle lamp 10F.

  As shown in FIGS. 39 (a) and 39 (b), the vehicular lamp 10F according to the present embodiment is a first view of the second lens portion 12A2 of the vehicular lamp 10A according to the second embodiment as viewed from above. Inclined with respect to the reference axis AX1 (that is, given the camber angle θ1) and tilted with respect to the horizontal (that is, given the slant angle θ2) in front view, that is, with the fifth embodiment This corresponds to a combination of the sixth embodiment.

  That is, the second emission surface 12A2b of the present embodiment extends in a direction inclined by a predetermined angle with respect to the first reference axis AX1 when viewed from above, as in the fifth embodiment, and is similar to the sixth embodiment. In the front view, it is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the horizontal.

  The first emission surface 12A1a of the present embodiment is a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical when viewed from the front (see FIG. 36), and has a low beam light distribution pattern. The surface shape is adjusted so as to be totally condensed.

  Further, the reflection surface 12b and the shade 12c of the present embodiment are inclined by a predetermined angle θ2 in the opposite direction to the second emission surface 12A2b and the first emission surface 12A1a with respect to the horizontal in the front view as in the sixth embodiment. Arranged in posture.

  According to the present embodiment, it is possible to provide a new-looking lens body (lens combined body) provided with a camber angle and a slant angle, and a vehicular lamp using the lens body. In addition, the fifth and sixth embodiments described above can be provided. The same effect as the embodiment can be obtained.

  It should be noted that the idea of “giving camber angle and slant angle” explained in the present embodiment, and the above-described blurring and rotation generated due to the provision of the camber angle and slant angle are improved and suppressed as described above. This concept is not limited to the vehicular lamp 10A (lens body 12A) of the second embodiment, but can also be applied to the respective modifications, the vehicular lamp (lens body) of the third and fourth embodiments, and the like. Similarly, the present invention can be applied to a vehicular lamp 10J (lens body 12J) of a tenth embodiment described later.

  Next, the vehicular lamp 10G of the first comparative example will be described with reference to the drawings.

  40A is a side view of the vehicular lamp 10G of the first comparative example (only the main optical surface), FIG. 40B is a top view (only the main optical surface), and FIG. 40C is the vehicular lamp 10G. It is an example of the light distribution pattern formed by.

  As shown in FIGS. 40 (a) and 40 (b), the vehicular lamp 10G of the comparative example is configured so that the second lens portion 12A2 of the vehicular lamp 10D of the fifth embodiment is horizontally in front view. This corresponds to a tilted angle (ie, a slant angle θ2 is given).

  That is, the first emission surface 12A1a of the present comparative example is configured as a semi-cylindrical surface extending in the vertical direction when viewed from the front as in the fifth embodiment. That is, unlike the sixth embodiment, the first emission surface 12A1a of the present comparative example is not configured as a semi-cylindrical surface extending in a direction inclined by the predetermined angle θ2 with respect to the vertical in front view.

  Moreover, the reflective surface 12b and the shade 12c of this comparative example are arrange | positioned with the attitude | position which becomes horizontal by front view similarly to 5th Embodiment. That is, unlike the sixth embodiment, the first emission surface 12A1a of the comparative example is inclined in a direction inclined by a predetermined angle θ2 in the opposite direction to the second emission surface 12A2b and the first emission surface 12A1a in the front view. Not arranged in.

  As shown in FIG. 40C, the light distribution pattern formed by the vehicular lamp 10G of this comparative example greatly protrudes upward from the horizontal line, and it can be seen that it is not suitable as a low beam light distribution pattern.

  Next, the vehicular lamp 10H of the second comparative example will be described with reference to the drawings.

  41A is a side view of the vehicular lamp 10H of the second comparative example (only the main optical surface), FIG. 41B is a top view (only the main optical surface), and FIG. 41C is the vehicular lamp 10H. It is an example of the light distribution pattern formed by.

  As shown in FIGS. 41 (a) and 41 (b), the vehicular lamp 10H of this comparative example is similar to the sixth embodiment in the first emission surface 12A1a of the vehicular lamp 10G of the first comparative example. This corresponds to a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical when viewed from the front.

  That is, the first emission surface 12A1a of this comparative example is configured as a semi-cylindrical surface extending in a direction inclined by a predetermined angle θ2 with respect to the vertical as seen from the front, similarly to the sixth embodiment.

  Moreover, the reflective surface 12b and the shade 12c of this comparative example are arrange | positioned with the attitude | position which becomes horizontal by front view similarly to 5th Embodiment. That is, unlike the sixth embodiment, the first emission surface 12A1a of the comparative example is inclined in a direction inclined by a predetermined angle θ2 in the opposite direction to the second emission surface 12A2b and the first emission surface 12A1a in the front view. Not arranged in.

  As shown in FIG. 41 (c), the light distribution pattern formed by the vehicular lamp 10H of this comparative example greatly protrudes upward from the horizontal line, and it can be seen that it is not suitable as a low beam light distribution pattern.

  Next, as an eighth embodiment, a problem when the camber angle θ1 is increased and a method for solving the problem will be described.

  FIG. 42A shows an example of a low beam light distribution pattern formed by the vehicle lamp 10D of the fifth embodiment (same as the vehicle lamp 10F of the seventh embodiment) when the camber angle θ1 is 30 °. FIG. 42B shows a low-beam light distribution pattern formed by the vehicular lamp 10D of the fifth embodiment (the same applies to the vehicular lamp 10F of the seventh embodiment) when the camber angle θ1 is 45 °. It is an example. The hatched area in FIG. 42 (b) indicates that the area is brighter than the similar area in FIG. 42 (a).

  When the present inventors confirmed by simulation, when the camber angle θ1 is increased (for example, θ1 = 45 °) in the vehicular lamp 10D of the fifth embodiment (the same applies to the vehicular lamp 10F of the seventh embodiment), FIG. As shown in 42 (b), it was found that the area above the cut-off line became brighter.

  The reason for this will be described below with reference to the drawings.

  FIG. 43 is a sectional view of the vehicular lamp 10D of the fifth embodiment (only the main optical surface). A line with an arrow at the tip in FIG. 43 represents an optical path followed by the light Ray2 from the light source 14 incident at a certain incident angle with respect to the first emission surface 12A1a.

  When the camber angle θ1 is increased (for example, θ1 = 45 °) in the vehicle lamp 10D of the fifth embodiment (the same applies to the vehicle lamp 10F of the seventh embodiment), the camber angle θ1 is decreased (for example, θ1 = 30 °). ) As compared with the case, as shown in FIG. 43, the distance between the first exit surface 12A1a and the second entrance surface 12A2a is increased. Therefore, the incident position of the light Ray2 with respect to the second incident surface 12A2a is lower than when the camber angle θ1 is small (for example, θ1 = 30 °), and the light Ray2 incident from the lower incident position is as shown in FIG. In addition, the light travels obliquely upward with respect to the horizontal. As a result, glare occurs and the cut-off line becomes unclear.

  Even if the extraction angles α and β set on the first exit surface 12A1a and the second entrance surface 12A2a are increased, the light Ray2 becomes light traveling obliquely upward with respect to the horizontal for the same reason as described above. It has been found.

  Next, a method for solving the above problem will be described.

  As a result of intensive studies to improve the above problems, the present inventors have found that the light Ray2 directed upward with respect to the horizontal is emitted from a partial region below the second emission surface 12A2b, This partial region is physically cut, or the surface shape of the partial region (for example, so that the light Ray2 emitted from the partial region becomes parallel or downward light with respect to the first reference axis AX) The above-mentioned problem can be improved by adjusting the curvature).

  FIG. 44 (a) is an example in which the lower partial region 12A2b2 of the second emission surface 12A2b is physically cut to leave the upper region 12A2b1 based on the above knowledge. In this way, by cutting a partial region from which light originally directed obliquely upward with respect to the horizontal is cut, it is possible to suppress light traveling obliquely upward. As a result, the occurrence of glare can be suppressed and the cut-off line can be made clear.

  FIG. 44 (b) shows the light Ray2 emitted from the lower partial region 12A2b2 of the second emission surface 12A2b based on the above knowledge so that the light Ray2 becomes parallel or downward with respect to the first reference axis AX. In this example, the surface shape (for example, curvature) of the partial region 12A2b2 is adjusted, and the second emission surface 12A2b is divided into an upper region 12A2b1 and a lower region 12A2b2. As described above, light that travels obliquely upward can also be suppressed by adjusting the partial region from which light that is originally directed upward with respect to the horizontal is emitted as described above. As a result, the occurrence of glare can be suppressed and the cut-off line can be made clear.

  The present inventors have confirmed by simulation that any of the above methods can suppress the above-mentioned problem, that is, that the area above the cut-off line can become brighter.

  Next, as a ninth embodiment, a vehicle lamp 10I in which a second reference axis AX2 is inclined with respect to the first reference axis AX1 in a top view will be described with reference to the drawings.

  FIG. 45 is a top view (only the main optical surface) of the vehicular lamp 10I in which the second reference axis AX2 is inclined with respect to the first reference axis AX1 in a top view.

  As shown in FIG. 45, the vehicular lamp 10I of the present embodiment shades the second reference axis AX2 of the vehicular lamp 10D of the fifth embodiment (or the vehicular lamp 10F of the seventh embodiment). This is equivalent to an axis that is rotated by a predetermined angle about the center in the left-right direction of 12c and tilted with respect to the first reference axis AX1 in a top view.

  According to the present embodiment, in addition to the effects of the fifth embodiment, the Fresnel reflection loss (particularly, the Fresnel reflection loss with respect to the second emission surface 12A2b to which the camber angle is given as shown in FIG. 45) is suppressed. As a result, the effect that the light utilization efficiency is improved can be achieved.

  The concept of “inclining the second reference axis AX2 with respect to the first reference axis AX1 in a top view” described in the present embodiment is applied to the vehicular lamp 10A (lens body 12A) of the fifth embodiment. The present invention is not limited to this, and the present invention can also be applied to the vehicle lamps (lens bodies) of the first to fourth and sixth to eighth embodiments. Similarly, the present invention can be applied to a vehicular lamp 10J (lens body 12J) of a tenth embodiment described later.

  Next, a vehicle lamp 10J (lens body 12J) according to a tenth embodiment will be described with reference to the drawings.

  The vehicular lamp 10J (lens body 12J) of the present embodiment is configured as follows.

46 is a perspective view of the vehicular lamp 10J (lens body 12J), FIG. 47 (a) is a top view, FIG. 47 (b) is a front view, and FIG. 47 (c) is a side view. FIG. 48A shows an example of a low beam light distribution pattern P _LO (synthetic light distribution pattern) formed by the vehicular lamp 10J (lens body 12J), and each part shown in FIGS. 48B to 48D. It is formed by superimposing the distribution light patterns P _SPOT , P _MID and P _WIDE .

The lens body 12J of the present embodiment forms a spot light distribution pattern P _SPOT (see FIG. _48B ), and the same first optical system as the lens body 12A of the second embodiment (see FIG. 49A). ) And a second optical system (see FIG. 49B) for forming a mid light distribution pattern P _MID (see FIG. _48C ) diffused from the spot light distribution pattern P _SPOT , and A third optical system (see FIG. 49C) that forms a wide light distribution pattern P _WIDE (see FIG. 48D (d)) diffused from the mid light distribution pattern P _MID is provided.

  Hereinafter, differences from the vehicular lamp 10A (lens body 12A) of the second embodiment will be mainly described, and the same configuration as the vehicular lamp 10A (lens body 12A) of the second embodiment will be the same. Reference numerals are assigned and explanations thereof are omitted.

  As shown in FIGS. 46 and 47, the lens body 12J of the present embodiment has the same configuration as the lens body 12A of the second embodiment, and includes a first rear end portion 12A1aa, a front end portion 12A1bb, and a first rear end portion 12A1aa. And a pair of left and right side surfaces 44a, 44b disposed between the first front end portion 12A1bb and a lower reflective surface 12b disposed between the first rear end portion 12A1aa and the first front end portion 12A1bb. A lens unit 12A1, a second lens unit 12A2 disposed in front of the first lens unit 12A1, and including a second rear end unit 12A2aa and a second front end unit 12A2bb, and the first lens unit 12A1 and the second lens unit 12A2. A lens body that includes a connected portion 12A3 and further includes an upper surface 44c disposed between the first rear end portion 12A1aa and the first front end portion 12A1bb of the first lens portion 12A1. It is configured.

  The lens body 12J of the present embodiment is integrally molded by injecting a transparent resin such as polycarbonate or acrylic, cooling, and solidifying (by injection molding) as in the above embodiments.

  50A is a front view of the first rear end portion 12A1aa of the first lens portion 12A1, FIG. 50B is a cross-sectional view (schematic diagram) along AA in FIG. 50A, and FIG. It is BB sectional drawing (schematic diagram) of Fig.50 (a).

  As shown in FIGS. 50A and 50B, the first rear end portion 12A1aa of the first lens portion 12A1 is formed on the first incident surface 12a and the left and right sides of the first incident surface 12a. It includes a pair of left and right incident surfaces 42a and 42b disposed so as to surround the space between the light source 14 disposed in the vicinity of the incident surface 12a and the first incident surface 12a from both the left and right sides. As shown in FIGS. 50A and 50C, the first rear end portion 12A1aa further includes a space between the light source 14 and the first incident surface 12a on the upper side of the first incident surface 12a. The upper entrance surface 42c is disposed so as to surround the surface.

  The tip of the lower reflecting surface 12b includes a shade 12c.

  As shown in FIG. 46, the first front end portion 12A1bb of the first lens portion 12A1 includes a semicircular columnar first emission surface 12A1a extending in the vertical direction and a pair of left and right arranged on the left and right sides of the first emission surface 12A1a. Output surfaces 46a and 46b.

  The second rear end portion 12A2aa of the second lens portion 12A2 includes a second incident surface 12A2a, and the second front end portion 12A2bb of the second lens portion 12A2 includes a second emission surface 12A2b.

  The second emission surface 12A2b includes a semi-cylindrical region 12A2b3 extending in the horizontal direction and an extended region 12A2b4 extending obliquely upward and rearward from the upper edge of the semi-cylindrical region 12A2b3.

  The connecting part 12A3 includes the first lens part 12A1 and the second lens part 12A2 at the upper part thereof, the first front end part 12A1bb of the first lens part 12A1, the second rear end part 12A2aa of the second lens part 12A2, and the connecting part. The space S surrounded by the portion 12A3 is connected in a formed state.

  FIG. 49A is a side view of the first optical system (only the main optical surface).

As shown in FIG. 49A, the first incident surface 12a, the lower reflecting surface 12b (and the shade 12c), the first exit surface 12A1a, the second entrance surface 12A2a, and the second exit surface 12A2b (semi-cylindrical shape) In the region 12A2b3), the light Ray _SPOT from the light source 14 that has entered the first lens unit 12A1 from the first incident surface 12a is partially blocked by the shade 12c, and is internally reflected by the lower reflecting surface 12b. The light exits from the first exit surface 12A1a, and further enters the second lens portion 12A2 from the second entrance surface 12A2a and enters a partial region A1 (second region 12A2b3) of the second exit surface 12A2b (semi-columnar region 12A2b3). As shown in FIG. 48 (b), the cut-off line defined by the shade 12c is included in the upper edge as shown in FIG. 48 (b). Constitute a first optical system for forming a light distribution pattern P _SPOT spot (corresponding to the first light distribution pattern of the present invention).

  FIG. 49B is a top view of the second optical system (only the main optical surface).

As shown in FIG. 49B, a pair of left and right entrance surfaces 42a and 42b, a pair of left and right side surfaces 44a and 44b, a pair of left and right exit surfaces 46a and 46b, a second entrance surface 12A2a, and a second exit surface 12A2b ( The semi-cylindrical region 12A2b3) has the light Ray _MID from the light source 14 incident on the inside of the first lens portion 12A1 through the pair of left and right incident surfaces 42a and 42b and internally reflected by the pair of left and right side surfaces 44a and 44b. The light exits from the pair of exit surfaces 46a and 46b, and further enters the second lens portion 12A2 from the second entrance surface 12A2a, and is mainly a partial region A1 of the second exit surface 12A2b (semi-columnar region 12A2b3). heavy by being irradiated both left and right sides of the region A2, A3 forward emitted (FIG. 47 (b) refer), as shown in FIG. 48 (c), the spot light distribution pattern P _sPOT Is the constitute a second optical system for forming a mid light distribution pattern P _MID diffused from the light distribution pattern P _SPOT spot.

The pair of left and right entrance surfaces 42a and 42b is refracted by light (mainly light Ray _MID spreading in the left and right direction, see FIG. _50B ) that does not enter the first entrance surface 12a among the light from the light source 14. As shown in FIG. 50 (b), the surface incident on the inside of one lens portion 12 </ b> A <b> 1 is configured as a curved surface (for example, a free curved surface) convex toward the light source 14.

  As shown in FIG. 47A, the pair of left and right side surfaces 44a and 44b are a pair of left and right side surfaces as viewed from the top, from the first front end portion 12A1bb side of the first lens portion 12A1 toward the first rear end portion 12A1aa side. The space | interval between 44a, 44b is comprised as a curved surface (for example, free-form surface) convex toward the outer side which narrows in a taper shape. Further, as shown in FIG. 47 (c), the pair of left and right side surfaces 44a and 44b are arranged on the upper side of the first lens portion 12A1 from the first front end portion 12A1bb side toward the first rear end portion 12A1aa side view. The edge and the lower edge are configured as surfaces having a tapered shape.

The pair of left and right side surfaces 44a and 44b reflect light Ray _MID from the light source 14 incident on the inside of the first lens portion 12A1 from the pair of left and right entrance surfaces 42a and 42b toward the pair of left and right exit surfaces 46a and 46b. No metal vapor deposition is used on the reflecting surface (total reflection).

  The pair of left and right emission surfaces 46a and 46b are configured as planar surfaces. Of course, not limited to this, it may be configured as a curved surface.

With the second optical system having the above-described configuration, the mid light distribution pattern P _MID shown in FIG. _48C is formed on the virtual vertical screen.

The vertical dimension of the mid light distribution pattern P _MID is about 10 degrees in FIG. 48C, but is not limited to this. For example, the surface shape of the pair of left and right entrance surfaces 42a and 42b (for example, in the vertical direction) It can be adjusted freely by adjusting the curvature.

In addition, the position of the upper edge of the mid light distribution pattern P _MID is slightly below the horizontal line in FIG. 48C, but is not limited to this, and the surface shape of the pair of left and right entrance surfaces 42a and 42b (for example, left and right) It can be freely adjusted by adjusting the inclination of the pair of incident surfaces 42a and 42b.

Further, in FIG. _48C , the right end and the left end of the mid light distribution pattern P _MID extend to about 30 degrees to the right and about 30 degrees to the left, but the present invention is not limited to this. For example, a pair of left and right entrance surfaces 42a, 42b and / or a pair of left and right side surfaces 44a and 44b (for example, respective horizontal curvatures) can be adjusted freely.

  FIG. 49C is a side view of the third optical system (only the main optical surface).

As shown in FIG. 49 (c), the upper incident surface 42c, the upper surface 44c, the coupling portion 12A3, and the second emission surface 12A2b (extended region 12A2b4) enter the first lens portion 12A1 from the upper incident surface 42c. The light Ray _WIDE from the light source 14 that has been internally reflected by the upper surface 44c and traveled through the connecting portion 12A3 is emitted from the second emission surface 12A2b (the region A4 above each of the regions A1 to A3, that is, the extension region 12A2b4). by being irradiated forward Te, as shown in FIG. 48 (d), it is superimposed on the light distribution pattern for spot P _sPOT and mid light distribution pattern P _MID, wide diffused from mid light distribution pattern P _MID A third optical system for forming the light distribution pattern P _WIDE is configured.

The upper incident surface 42c refracts light (mainly, light Ray _Wide spreading upward, see FIG. _50C ) that does not enter the first incident surface 12a out of the light from the light source 14, and the first lens portion 12A1. As shown in FIG. 50C, the surface that enters the inside is configured as a curved surface (for example, a free-form surface) that is convex toward the light source 14.

As shown in FIGS. 46 and 49C, the upper surface 44c is an outer side inclined obliquely downward from the first front end portion 12A1bb side of the first lens portion 12A1 toward the first rear end portion 12A1aa side view. It is configured as a surface having a curved surface shape convex toward the surface. Further, as shown in FIG. 47A, the upper surface 44c has a left edge and a right edge as viewed from the upper surface as it goes from the first front end portion 12A1bb side of the first lens portion 12A1 toward the first rear end portion 12A1aa side. It is configured as a surface that narrows in a tapered shape. Specifically, the upper surface 44c is such that the light Ray _WIDE from the light source 14 (more precisely, the reference point F) incident on the first lens portion 12A1 from the upper incident surface 42c becomes parallel light in the vertical direction. The surface shape is configured. Further, the upper surface 44c extends in a direction perpendicular to the paper surface in FIG. 49C with respect to the horizontal direction.

The upper surface 44c is a reflecting surface that internally reflects (totally reflects) the light Ray _WIDE from the light source 14 that has entered the first lens portion 12A1 from the upper incident surface 42c toward the second emitting surface 12A2b (extended region 12A2b4). And metal vapor deposition is not used.

  The extension region 12A2b4 is configured as a planar surface extending obliquely upward and rearward from the upper edge of the second emission surface 12A2b (semi-columnar region 12A2b3). Of course, not limited to this, it may be configured as a curved surface. The semi-cylindrical region 12A2b3 and the extended region 12A2b4 are smoothly connected without a step.

Top 44c, as shown in FIG. 49 (c), includes a reflecting surface for overhead sign 44c1 for forming a light distribution pattern P _OH for overhead sign irradiating the cutoff line above the road signs and the like. The overhead sign reflecting surface 44c1 enters the first lens portion 12A1 from the upper incident surface 42c, is reflected by the overhead sign reflecting surface 44c1, and the light RayOH from the light source 14 that has traveled through the connecting portion 12A3 is secondly reflected. As shown in FIG. 48 (d), by emitting from the emission surface 12A2b (extension region 12A2b4) and irradiating obliquely upward in front, the overhead sign light distribution pattern _POH is formed above the cut-off line. The surface shape is configured. The overhead sign reflecting surface 44c1 can be omitted as appropriate.

The third optical system includes the upper incident surface 42c, the coupling portion 12A3, and the second emission surface 12A2b (extension region 12A2b4) instead of the above, and is provided from the upper incident surface 42c to the inside of the first lens portion 12A1. The light Ray _WIDE from the incident light source 14 travels inside the connecting portion 12A3 without being internally reflected, and is emitted directly from the second emission surface 12A2b (extension region 12A2b4) and irradiated forward, as shown in FIG. As shown in d), an optical system for forming the wide light distribution pattern P _WIDE may be used.

With the third optical system configured as described above, the wide light distribution pattern P _WIDE and the overhead sign light distribution pattern P _{OH shown} in FIG. _48D are formed on the virtual vertical screen.

The vertical dimension of the wide light distribution pattern P _WIDE is about 15 degrees in FIG. _48D , but is not limited to this, and for example, the surface shape (for example, the curvature in the vertical direction) of the upper incident surface 42c is adjusted. By doing so, it can be adjusted freely.

Further, the position of the upper edge of the wide light distribution pattern P _WIDE is along the horizontal line in FIG. 48D, but is not limited to this, and can be freely adjusted by adjusting the inclination of the upper surface 44c. .

In the present embodiment, as shown in FIG. 46, the upper surface 44c includes a left upper surface 44c2 and a right upper surface 44c3 that are divided into left and right by a vertical surface including the reference axis AX1, and each of the left upper surface 44c2 and the right upper surface 44c3. The slopes are different from each other. Specifically, the left upper surface 44c2 is inclined below the right upper surface 44c3. As a result, as shown in FIG. 48D, the wide light distribution pattern P _WIDE includes a cut-off line having a left-right step difference with the upper end edge on the left side lower than the upper end edge on the right side with respect to the vertical line. (If you are driving on the right side) Of course, conversely, the left upper surface 44c2 may be tilted above the right upper surface 44c3. As a result, the wide light distribution pattern P _WIDE can include a cut-off line having a left-right step difference in which the upper end edge on the left side is higher than the upper end edge on the right side with respect to the vertical line (in the case of left-hand traffic).

In addition, the right end and the left end of the wide light distribution pattern P _WIDE extend to about 65 degrees to the right and to about 65 degrees to the left in FIG. 48D. However, the present invention is not limited to this. For example, the upper incident surface 42c (for example, It can be adjusted freely by adjusting the curvature in the horizontal direction.

  According to this embodiment, in addition to the effects of the second embodiment, the following effects can be further achieved.

That is, first, it is possible to provide a lens body 12J that can maintain a line-like light emission appearance even when the viewpoint position changes, and a vehicle lamp 10J including the lens body 12J. Secondly, it is possible to provide a lens body 12J capable of realizing the appearance of uniform light emission (or substantially uniform light emission) and a vehicle lamp 10J including the lens body 12J. Third, the efficiency of taking light from the light source 14 into the lens body 12J is dramatically improved. Fourthly, it is possible to provide a lens body 12J having a sense of unity extending in a line shape in a predetermined direction and a vehicular lamp 10J including the lens body 12J. Fifth, even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface 12A2b3 (semi-cylindrical refractive surface), the distribution for the spot condensed in the horizontal and vertical directions is used. A lens body 12J capable of forming the light pattern P _SPOT and a vehicular lamp 10J provided with the lens body 12J can be provided.

One lens body 12J can maintain a line-like light emission appearance even if the viewpoint position changes, that is, a plurality of light distribution patterns having different degrees of diffusion, that is, a spot light distribution pattern P _SPOT (the present invention). Light distribution pattern P _MID (corresponding to the second light distribution pattern of the present invention) and wide light distribution pattern P _WIDE (corresponding to the third light distribution pattern of the present invention). A plurality of optical systems to be formed, that is, a first optical system (see FIG. 49A), a second optical system (see FIG. 49B), and a third optical system (see FIG. 49C) are provided. Is due to being. In order to achieve this effect, at least the first optical system (see FIG. 49 (a)) and the second optical system (see FIG. 49 (b)) may be provided. 49 (c)) can be omitted as appropriate.

  Appearance of uniform light emission (or substantially uniform light emission) can be realized by the first lens portion from each incident surface, that is, the first incident surface 12a, the pair of left and right incident surfaces 42a and 42b, and the upper incident surface 42c. The light from the light source 14 incident on the inside of 12A1 is reflected by the respective reflecting surfaces, that is, the lower reflecting surface 12b, the pair of left and right side surfaces 44a and 44b, and the upper surface 44c. 51), and the reflected light from the respective reflecting surfaces, that is, the lower reflecting surface 12b, the pair of left and right side surfaces 44a and 44b, and the upper surface 44c is almost the entire area of the second emitting surface 12A2b that is the final emitting surface. That is, the reflected light from the lower reflecting surface 12b is a partial area A1 (of the second emitting surface 12A2b (semi-cylindrical region 12A2b3) that is the final emitting surface. 47 (b)), and the reflected light from the pair of left and right side surfaces 44a and 44b is a partial region of the second emission surface 12A2b (semi-cylindrical region 12A2b3) that is mainly the final emission surface. The light emitted from the regions A2 and A3 on both the left and right sides of A1 (see FIG. 47B), and the reflected light from the upper surface 44c is mainly the second emission surface 12A2b (each of the regions A1 to A3) that is the final emission surface. Upper region A4, that is, by exiting from extended region 12A2b4). In order to achieve this effect, at least the first optical system (see FIG. 49 (a)) and the second optical system (see FIG. 49 (b)) may be provided. 49 (c)) can be omitted as appropriate.

  The efficiency of taking the light from the light source 14 into the lens body 12J is greatly improved because the respective incident surfaces, that is, the first incident surface 12a, the pair of left and right incident surfaces 42a and 42b, and the upper incident surface 42c are light sources. 14 (see FIGS. 50 (a) to 50 (c)). In order to achieve this effect, at least the first incident surface 12a and the pair of left and right incident surfaces 42a and 42b may be provided, and the upper incident surface 42c can be omitted as appropriate.

  The vehicular lamp 10J (lens body 12J) of the present embodiment corresponds to the above concept applied to the vehicular lamp 10A of the second embodiment including the first emission surface 12A1a and the second emission surface 12A2b. Not limited to this. That is, the above concept is applied to the vehicular lamp 10 according to the first embodiment including one emission surface, for example, other than the vehicular lamp 10A according to the second embodiment including the first emission surface 12A1a and the second emission surface 12A2b. It can also be applied.

  The second output surface 12A2b, which is the final output surface, can be configured as a semi-cylindrical surface 12A2b3 (a semi-cylindrical refracting surface). It is because it is.

The spot light distribution pattern P _SPOT condensed in the horizontal direction and the vertical direction even though the second emission surface 12A2b, which is the final emission surface, is a semi-cylindrical surface 12A2b3 (a semi-cylindrical refractive surface). What can be formed is that the first light exit surface 12A1a (semi-cylindrical refracting surface) of the first lens portion 12A1 is mainly responsible for condensing in the horizontal direction, and the lens body 12J is mainly responsible for condensing in the vertical direction. This is because the second exit surface 12A2b (a semi-cylindrical refractive surface) of the second lens portion 12A2, which is the final exit surface, takes charge. That is, it is due to the decomposition of the light collecting function.

  In addition, each idea explained in the first to ninth embodiments and the modifications thereof, for example, the idea of “giving camber angle” explained in the fifth embodiment, and the occurrence of this camber angle. The concept of improving the blur as described above, the concept of “giving a slant angle” explained in the sixth embodiment, and the rotation generated with the grant of the slant angle as described above The idea of suppressing, the idea of “giving camber angle and slant angle” explained in the seventh embodiment, and the blur and rotation generated by the provision of the camber angle and slant angle are as described above. Of course, the idea of improvement and suppression can be applied to the vehicular lamp 10J (lens body 12J) of the present embodiment.

In the tenth embodiment, the second optical system (see FIG. 49B) is configured to form the mid light distribution pattern P _MID , and the third optical system (see FIG. 49C) is configured. Although the example configured to form the wide light distribution pattern P _WIDE has been described, the present invention is not limited to this.

For example, on the contrary, the second optical system (see FIG. 49B) is configured to form a wide light distribution pattern P _WIDE and the third optical system (see FIG. 49C) is mid. The light distribution pattern P _MID may be formed.

  For example, the surface shape (for example, the curvature in the horizontal direction) of the pair of left and right entrance surfaces 42a and 42b and / or the pair of left and right side surfaces 44a and 44b constituting the second optical system is adjusted as shown in FIG. Thus, the light distribution pattern can be expanded (for example, in the horizontal direction), and the light distribution pattern can be narrowed (for example, in the horizontal direction) by adjusting as shown in FIG. Accordingly, by adjusting the surface shape (for example, the curvature in the horizontal direction) of the pair of left and right entrance surfaces 42a and 42b and / or the pair of left and right side surfaces 44a and 44b constituting the second optical system, the mid light distribution pattern can be obtained. Not limited to this, a wide light distribution pattern can also be formed.

  Similarly, by adjusting the surface shape (for example, the curvature in the horizontal direction) of the upper incident surface 42c constituting the third optical system as shown in FIG. 55A, the light distribution pattern (for example, in the horizontal direction) is adjusted. ) And the light distribution pattern can be narrowed (for example, in the horizontal direction) by adjusting as shown in FIG. Therefore, by adjusting the surface shape (for example, the curvature in the horizontal direction) of the upper entrance surface 42b constituting the third optical system, not only the wide light distribution pattern but also the mid light distribution pattern can be formed. .

Of course, both the second optical system (see FIG. 49B) and the third optical system (see FIG. 49C) may be configured to form the wide light distribution pattern P _WIDE . Conversely, the second optical system (see FIG. 49B) and the third optical system (see FIG. 49C) may both be configured to form the mid light distribution pattern P _MID. .

  Next, a vehicle lamp 10K (lens body 12K) according to an eleventh embodiment will be described with reference to the drawings.

  The vehicular lamp 10K (lens body 12K) of the present embodiment is configured as follows.

56 is a perspective view of the vehicular lamp 10K (lens body 12K), FIG. 57 (a) is a top view, FIG. 57 (b) is a front view, and FIG. 57 (c) is a side view. FIG. 58A shows an example of a low beam light distribution pattern P _LO (composite light distribution pattern) formed by the vehicular lamp 10K (lens body 12K), and each part shown in FIGS. 58B to 58D. It is formed by superimposing the distribution light patterns P _SPOT , P _MID and P _WIDE .

Similarly to the tenth embodiment, the lens body 12K of the present embodiment has a first optical system (FIGS. _{59A and 59B} ) that forms a spot light distribution pattern P _SPOT (see FIG. 58B). Reference), a second optical system (see FIG. _60A ) for forming a mid light distribution pattern P _MID (see FIG. _58C ) diffused from the spot light distribution pattern P _SPOT , and a mid light distribution A third optical system (see FIG. 60B) is provided that forms a wide light distribution pattern P _WIDE (see FIG. _58D ) diffused from the pattern P _MID .

  Hereinafter, differences from the vehicular lamp 10J (lens body 12J) of the tenth embodiment will be mainly described, and the same configurations as those of the vehicular lamp 10J (lens body 12J) of the tenth embodiment will be described. Reference numerals are assigned and explanations thereof are omitted.

As shown in FIGS. 56 and 57, the lens body 12K of the present embodiment is a lens body arranged in front of the light source 14, and includes a rear end portion 12Kaa, a front end portion 12Kbb, a rear end portion 12Kaa, and a front end portion 12Kbb. Including a pair of left and right side surfaces 44a and 44b, an upper surface 44c and a lower surface 44d, and the light from the light source 14 (precisely, the reference point F) incident on the lens body 12K is transmitted to the front end portion 12Kbb ( The lens body is configured to form a low beam light distribution pattern P _Lo (corresponding to the predetermined light distribution pattern of the present invention) shown in FIG. 58A by being emitted from the emission surface 12Kb) and irradiated forward. Yes. The lens body 12K includes a lower reflecting surface 12b disposed between the rear end portion 12Kaa and the front end portion 12Kbb, and a bell-shaped lens body that narrows in a cone shape as it goes from the front end portion 12Kbb side to the rear end portion 12Kaa side. It is configured as.

  The lens body 12K of this embodiment is integrally molded by injecting a transparent resin such as polycarbonate and acrylic, cooling, and solidifying (by injection molding) as in the above embodiments.

  61A is a front view of the rear end portion 12Kaa of the lens body 12K, FIG. 61B is a cross-sectional view (schematic diagram) of A1-A1 in FIG. 61A, and FIG. 61C is FIG. Is a cross-sectional view (schematic diagram) of B1-B1.

  As shown in FIGS. 61 (a) and 61 (b), the rear end portion 12Kaa of the lens body 12K has the first incident surface 12a and the first incident surface on the left and right sides of the first incident surface 12a. It includes a pair of left and right incident surfaces 42a and 42b disposed so as to surround the space between the surface 12a from both the left and right sides. As shown in FIGS. 61A and 61C, the rear end portion 12Kaa further surrounds the space between the light source 14 and the first incident surface 12a from the upper side above the first incident surface 12a. The upper incident surface 42c is arranged.

  The tip of the lower reflecting surface 12b includes a shade 12c.

  The front end portion 12Kbb of the lens body 12K includes an exit surface 12Kb. As shown in FIG. 56, the exit surface 12Kb is an exit surface 12d (convex surface convex forward) similar to that of the first embodiment. It includes a pair of left and right exit surfaces 46a and 46b disposed on the left and right sides of the exit surface 12d, and an exit surface 46c disposed above the exit surface 12d and the pair of left and right exit surfaces 46a and 46b. The exit surface 12d and the pair of left and right exit surfaces 46a and 46b (and the exit surface 46c) are smooth without a step through a joint surface 46d (a surface not intended for an optical function) surrounding the periphery of the exit surface 12d. It is connected.

  FIG. 59A is a side view of the first optical system, and FIG. 59B is an enlarged side view.

As shown in FIGS. 59A and 59B, the first incident surface 12a, the lower reflecting surface 12b (and the shade 12c), and the exit surface 12Kb are incident on the inside of the lens body 12K from the first incident surface 12a. Of the light Ray _SPOT from the light source 14, the light partially shielded by the shade 12c and the light internally reflected by the lower reflecting surface 12b are part of the region A1 (exiting surface 12d, FIG. 57 (b) of the emitting surface 12Kb. b), the spot light distribution pattern P _SPOT including the cut-off line defined by the shade 12c at the upper edge as shown in FIG. 58 (b). 1st optical system which forms a 1st light distribution pattern) is comprised.

  FIG. 60A is a top view of the second optical system.

As shown in FIG. 60A, the pair of left and right entrance surfaces 42a and 42b, the pair of left and right side surfaces 44a and 44b, and the exit surface 12Kb enter the inside of the lens body 12K from the pair of left and right entrance surfaces 42a and 42b. The light Ray _MID from the light source 14 internally reflected by the pair of left and right side surfaces 44a and 44b is mainly the regions A2 and A3 (the pair of left and right emission surfaces 46a and 46b) on both the left and right sides of the partial area A1 of the emission surface 12Kb. As shown in FIG. 58 (c), the light is emitted from the spot light distribution pattern P _SPOT superimposed on the spot light distribution pattern P _SPOT . A second optical system for forming the diffused mid light distribution pattern P _MID is configured.

The pair of left and right entrance surfaces 42a and 42b are refracted by light (mainly light Ray _MID spreading in the left-right direction, see FIG. _61B ) that does not enter the first entrance surface 12a among the light from the light source 14. As shown in FIG. 61 (b), the surface that enters the body 12K is configured as a curved surface (for example, a free curved surface) that is convex toward the light source.

  As shown in FIG. 57 (a), the pair of left and right side surfaces 44a and 44b have a taper between the pair of left and right side surfaces 44a and 44b as viewed from the top side toward the rear end portion 12Kaa side. It is configured as a curved surface (for example, a free-form surface) that protrudes toward the outside. In addition, as shown in FIG. 57 (c), the pair of left and right side surfaces 44a and 44b has a shape in which the upper edge and the lower edge are tapered in a side view from the front end portion 12Kbb side toward the rear end portion 12Kaa side. It is configured as a surface.

The pair of left and right side surfaces 44a and 44b reflect light Ray _MID from the light source 14 incident on the inside of the lens body 12K from the pair of left and right entrance surfaces 42a and 42b toward the pair of left and right exit surfaces 46a and 46b (all The reflective surface that reflects) does not use metal deposition.

  The pair of left and right emission surfaces 46a and 46b are configured as planar surfaces. Of course, not limited to this, it may be configured as a curved surface.

With the second optical system having the above-described configuration, the mid light distribution pattern P _MID shown in FIG. _58C is formed on the virtual vertical screen.

The vertical dimension of the mid light distribution pattern P _MID is about 15 degrees in FIG. 58C, but is not limited to this. For example, the surface shape of the pair of left and right entrance surfaces 42a and 42b (for example, in the vertical direction) It can be adjusted freely by adjusting the curvature.

In addition, the position of the upper edge of the mid light distribution pattern P _MID is along the horizontal line in FIG. 58C, but is not limited to this, and the surface shape of the pair of left and right entrance surfaces 42a and 42b (for example, the pair of left and right sides) Can be freely adjusted by adjusting the inclination of the incident surfaces 42a and 42b.

Further, the right end and the left end of the mid light distribution pattern P _MID extend to about 55 degrees to the right and about 55 degrees to the left in FIG. 58C, but the present invention is not limited to this. 42b and / or a pair of left and right side surfaces 44a and 44b (for example, respective horizontal curvatures) can be adjusted freely.

  FIG. 60B is a side view of the third optical system.

As shown in FIG. 60B, the upper incident surface 42c, the upper surface 44c, and the exit surface 12Kb are incident on the lens body 12K from the upper incident surface 42c and reflected from the inner surface by the upper surface 44c. Ray _WIDE is emitted mainly from the partial area A1 and the areas A2 and A3 on both the left and right sides of the partial area A1 of the emission surface 12Kb (the emission surface 46c, see FIG. 57 (b)). By irradiating forward, as shown in FIG. 58 (d), the wide light diffused from the mid light distribution pattern P _MID superimposed on the spot light distribution pattern P _SPOT and the mid light distribution pattern P _MID A third optical system for forming the light distribution pattern P _WIDE is configured.

The upper incident surface 42c refracts light that is not incident on the first incident surface 12a out of the light from the light source 14 (mainly light Ray _WIDE spreading upward, see FIG. _61C ) and is refracted inside the lens body 12K. As shown in FIG. 61C, the incident surface is configured as a curved surface (for example, a free curved surface) convex toward the light source 14.

As shown in FIGS. 56 and 57 (c), the upper surface 44c is a curved surface that is convex outward in an obliquely inclined downward direction from the front end portion 12Kbb side to the rear end portion 12Kaa side of the lens body 12K. It is configured as a shape surface. Further, as shown in FIG. 57 (a), the upper surface 44c has a shape in which the left edge and the right edge are tapered in the direction from the front end portion 12Kbb side to the rear end portion 12Kaa side in the top view. It is configured as a surface. Specifically, the upper surface 44c is arranged so that the light Ray _WIDE from the light source 14 (more precisely, the reference point F) incident on the lens body 12K from the upper incident surface 42c becomes parallel light in the vertical direction. The surface shape is configured. Further, the upper surface 44c extends in a direction perpendicular to the paper surface in FIG. 57 (c) with respect to the horizontal direction.

The upper surface 44c is a reflective surface that internally reflects (totally reflects) the light Ray _WIDE from the light source 14 that has entered the lens body 12K from the upper incident surface 42c toward the emission surface 46c, and does not use metal deposition.

  The emission surface 46c is configured as a planar surface. Of course, not limited to this, it may be configured as a curved surface.

The third optical system includes an upper incident surface 42c and an output surface 46c instead of the above, and the light Ray _WIDE from the light source 14 that has entered the lens body 12K from the upper incident surface 42c is internally reflected. Alternatively, an optical system that forms a wide light distribution pattern P _WIDE as shown in FIG. 58 (d) by emitting directly from the exit surface 46c and irradiating it forward may be used.

A wide light distribution pattern P _WIDE shown in FIG. _58D is formed on the virtual vertical screen by the third optical system having the above-described configuration.

The vertical dimension of the wide light distribution pattern P _WIDE is about 15 degrees in FIG. 58 (d), but is not limited to this. For example, the surface shape (for example, the curvature in the vertical direction) of the upper incident surface 42c is adjusted. By doing so, it can be adjusted freely.

Further, the position of the upper end edge of the wide light distribution pattern P _WIDE is substantially along the horizontal line in FIG. 58D, but is not limited thereto, and can be freely adjusted by adjusting the inclination of the upper surface 44c. it can.

In the present embodiment, as shown in FIG. 56, the upper surface 44c includes a left upper surface 44c2 and a right upper surface 44c3 that are divided into left and right by a vertical surface including the reference axis AX1, and each of the left upper surface 44c2 and the right upper surface 44c3. The slopes are different from each other. Specifically, the left upper surface 44c2 is inclined below the right upper surface 44c3. As a result, as shown in FIG. 58 (d), the wide light distribution pattern P _WIDE includes a cut-off line having a left-right step difference with the upper end edge on the left side lower than the upper end edge on the right side with respect to the vertical line. (If you are driving on the right side) Of course, conversely, the left upper surface 44c2 may be tilted above the right upper surface 44c3. As a result, the wide light distribution pattern P _WIDE can include a cut-off line having a left-right step difference in which the upper end edge on the left side is higher than the upper end edge on the right side with respect to the vertical line (in the case of left-hand traffic).

In addition, the right end and the left end of the wide light distribution pattern P _WIDE extend to about 60 degrees to the right and about 60 degrees to the left in FIG. 58D, but the present invention is not limited to this. For example, the upper incident surface 42c (for example, It can be adjusted freely by adjusting the curvature in the horizontal direction.

  Next, the appearance of the lens body 12K when the light source 14 is not turned on will be described.

  The lens body 12 </ b> K of this embodiment has a “brilliant feeling” as if the inside of the lens body is emitting light when viewed from multiple directions when the light source 14 is not lit.

  This is because the external light (for example, sunlight) that enters the lens body 12K from the exit surface 12Kb easily satisfies the condition for internal reflection (total reflection) inside the lens body 12K. Is configured as a bell-shaped lens body in which the lens body 12K narrows in a cone shape from the front end portion 12Kbb side toward the rear end portion 12Kaa side (see FIGS. 57A and 57C). In addition to the first condition, at least one of the incident surfaces 12a, 42a, 42b, and 42c is V-shaped (or V-shaped) opened toward the front end 12Kbb in a top view and / or a side view. (Refer to the dotted line circles (thick lines) indicated by reference numerals C1 to C4 in FIGS. 62A to 62C) (second condition). Note that it is only necessary to satisfy at least one of the first condition and the second condition.

  For example, the pair of left and right entrance surfaces 42a and 42b form a V-shape that is open toward the front end portion 12Kbb in a side view (reference numeral C1 in FIGS. 62 (a) and 62 (c)). (See the dotted circle (thick line)). Further, the pair of left and right entrance surfaces 42a and 42b constitute a part of a V-shape that is open toward the front end portion 12Kbb when viewed from above (indicated by the dotted line indicated by reference numeral C2 in FIG. 62B). (See inside circle (thick line)). Further, the first incident surface 12a has a V-shape that is open toward the front end portion 12Kbb in a top view (see a dotted circle (thick line) indicated by a symbol C3 in FIG. 62B). ). Further, the upper incident surface 42c constitutes a part of a V shape opened toward the front end portion 12Kbb in a side view (inside the dotted circle indicated by the symbol C4 in FIG. 62C (thick line) )reference).

  As described above, in addition to the lens body 12K being configured as a bell-shaped lens body that narrows in a cone shape from the front end portion 12Kbb side toward the rear end portion 12Kaa side, the incident surfaces 12a, 42a, 42b, At least one of 42c forms a V-shape (or a part of the V-shape) that opens toward the front end 12Kbb in a top view and / or a side view. As a result, the lens body is formed from the exit surface 12Kb. External light (for example, sunlight) incident on the inside of 12K repeats internal reflection (total reflection) inside the lens body 12K (the V-shaped portion or the like), and most of the light again from the exit surface 12Kb in various directions. To exit.

  For example, the external light RayCC shown in FIGS. 63A and 63B enters the lens body 12K from the exit surface 12Kb, and is internally reflected (total reflection) in this order on the left side surface 44a and the right side surface 44b. Then, the light exits again from the exit surface 12Kb. Further, for example, the external light RayDD shown in FIGS. 63A and 63C enters the lens body 12K from the exit surface 12Kb, and is internally reflected in this order by the lower surface 44d, the upper incident surface 42c, and the upper surface 44c. After being totally reflected, the light exits again from the exit surface 12Kb.

  In an actual driving environment (for example, a driving environment in daylight), not only the external light RayCC and RayDD, but external light (for example, sunlight) from all directions enters the lens body 12K, and the lens Internal reflection (total reflection) is repeated inside the body 12K (such as the V-shaped portion), and most of the light is emitted again in various directions from the emission surface 12Kb (see FIG. 64). As a result, when the light source 14 is not lit, the lens body 12K has a “glitter” appearance as if the lens body is emitting light when viewed from multiple directions. FIG. 64 shows an optical path (simulation result) in which the light source 50 that is regarded as external light is arranged in front of the lens body 12K, and the light from the light source 50 that has entered the lens body 12K from the exit surface 12Kb follows.

  According to the present embodiment, in addition to the effects of the tenth embodiment, the following effects can be further achieved.

  That is, the lens body 12K whose appearance does not become monotonous and the vehicular lamp 10K including the lens body 12K, particularly when the light source 14 is not lit, as if the inside of the lens body is emitting light when viewed from multiple directions. It is possible to provide the lens body 12K having a “glitter” appearance and the vehicle lamp 10K including the lens body 12K. As a result, the visibility when the light source 14 is not turned on (the vehicular lamp 10K, and thus the visibility of the vehicle on which the light is mounted) can be improved.

  The appearance does not become monotonous because the lens body 12K is not a conventional simple plano-convex lens, but a pair of left and right side surfaces 44a, 44b, an upper surface 44c and a lower surface disposed between the rear end portion 12Kaa and the front end portion 12bb. This is because the cross section surrounded by 44d is configured as a rectangular lens body.

  In addition, when the light source 14 is not turned on, the lens body 12K is viewed from the front end portion 12Kbb side when viewed from multiple directions. In addition to being configured to narrow in a cone shape toward the rear end 12Kaa side, at least one of the incident surfaces is opened toward the front end 12Kbb side in a top view and / or a side view. As a result of constituting a V-shape or a part of the V-shape, external light (for example, sunlight) that has entered the lens body 12K from the exit surface 12Kb is generated inside the lens body 12K (such as the V-shaped portion). ), Internal reflection (total reflection) is repeated, and most of the light is again emitted from the emission surface 12Kb in various directions.

  Each concept described in the first to tenth embodiments and the modifications thereof, for example, the concept of “disassembling the light collecting function” described in the second embodiment, and the “camber described in the fifth embodiment” The idea of “giving a corner”, the idea of improving the blur caused by the provision of the camber angle as described above, the idea of “giving a slant angle” explained in the sixth embodiment, and The concept of suppressing the rotation generated with the application of the slant angle as described above, the concept of “adding the camber angle and the slant angle” described in the seventh embodiment, and the camber angle and the slant. The idea of improving and suppressing the blur and rotation generated with the addition of the angle as described above is the vehicle lamp 10K (lens) according to the present embodiment. Is a course can be applied to the body 12K).

  Next, a lens body 12L, which is a first modification of the lens body 12K of the eleventh embodiment, will be described with reference to the drawings.

  FIG. 65A is a longitudinal sectional view showing an optical path followed by the light from the light source 14 incident on the lens body 12K of the eleventh embodiment, and FIG. 65B is a perspective view of the lens body 12L of this modification. .

As a result of a simulation confirmed by the present inventors, as shown in FIG. 65 (a), in the lens body 12K of the eleventh embodiment, the light enters the lens body 12K from each of the incident surfaces 12a, 42a, 42b, and 42c. It has been found that the light from the light source 14 does not enter the lower surface 44d, that is, the lower surface 44d is a region that is not used to form the light distribution patterns P _SPOT , P _MID , and P _WIDE .

As shown in FIG. 65 (b), the lens body 12L of the present modification has a plurality of quadrangular pyramid-shaped lens cuts LC on the lower surface 44d that are not used to form the light distribution patterns P _SPOT , P _MID , and P _WIDE. (For example, it corresponds to what gave the angle of incidence 30 degrees, the pitch 5 mm, and the peak height 3 mm). Otherwise, the configuration is the same as the lens body 12K of the eleventh embodiment. Each lens cut LC may have the same size and the same shape, or may have a different size and a different shape. Moreover, it may be arrange | positioned and may be arrange | positioned at random.

  According to this modification, in addition to the effects of the eleventh embodiment, the following effects can be further achieved.

  That is, when the light source 14 is not lit, the lens body 12L that looks as if the inside of the lens body is emitting light when viewed from multiple directions, and the vehicular lamp 10L including the lens body 12L. Can be provided. As a result, the visibility when the light source 14 is not turned on (the vehicular lamp 10L, and thus the visibility of the vehicle on which the light is mounted) can be enhanced.

  This is because various kinds of external light (for example, sunlight) incident on the inside of the lens body 12L from the exit surface 12Kb inside the lens body 12L (such as a plurality of quadrangular pyramid-shaped lens cuts LC provided on the lower surface 44d). This is due to internal reflection (total reflection) in the direction and emission from the emission surface 12Kb in various directions again.

  In order to confirm this effect, the inventors actually manufactured the lens body 12L of the present modification and the lens body of the comparative example (the lens body 12K of the eleventh embodiment), and each of the exit surfaces 12Kb has a luminance. Measurement was performed using a meter (trade name: Prometric).

  66 (a) to 66 (c) are diagrams showing measurement results (luminance distribution) of the exit surface 12Kb of the lens body 12L of this modification, and FIGS. 66 (d) to 66 (f) are comparative examples. It is a figure showing the measurement result (luminance distribution) of the output surface 12Kb of a lens body (lens body 12K of 11th Embodiment). The numerical value in each figure represents the measurement position. For example, the left and right 0 ° and the top and bottom 0 ° in FIG. 66 (a) indicate that the measurement position (luminance distribution) shown in FIG. 66 is 0 ° to the left and right and 0 ° to the center of the exit surface 12Kb (ie This indicates that the position is directly in front. The same applies to other figures. In each figure, the black portion indicates that the luminance is relatively low, and the white portion indicates that the luminance is relatively high.

  66 (a) to 66 (f), the lens body 12L of the present modified example having the lower surface 44d provided with a plurality of quadrangular pyramid-shaped lens cuts LC has a flat lower surface 44d. Compared with the lens body of the example (lens body 12K of the eleventh embodiment), the white portion and the black portion are clearly separated over the entire exit surface 12Kb, that is, the lens body 12L of this modification is a comparative example. From the lens body (lens body 12K of the eleventh embodiment), it can be seen that when the light source 14 is not turned on, it looks as if it is emitting light when viewed from multiple directions. .

  The lower surface 44d is not limited to a surface including a plurality of quadrangular pyramid-shaped lens cuts LC, and external light that enters the lens body 12L from the exit surface 12Kb and reaches the lower surface 44d is internally reflected in various directions ( What is necessary is just to be comprised as a surface which is totally reflected) and radiate | emits again from the output surface 12Kb. For example, the lower surface 44d may be configured as a surface including a plurality of lens cuts having a polygonal pyramid shape other than a quadrangular pyramid shape, or configured as a surface including a textured surface or a cut surface including a plurality of other minute irregularities. May be.

  Next, a lens body 12M that is a second modification of the lens body 12K of the eleventh embodiment will be described with reference to the drawings.

  FIG. 67A is a transverse sectional view showing an optical path followed by the light from the light source 14 that has entered the lens body 12K of the eleventh embodiment, and FIG. 67B is a perspective view of the lens body 12M of the present modification. .

As a result of a simulation confirmed by the present inventors, as shown in FIG. 67 (a), in the lens body 12K of the eleventh embodiment, the light enters the lens body 12K from each of the incident surfaces 12a, 42a, 42b, and 42c. The light from the light source 14 does not enter the extension regions 44aa and 44bb extended forward (for example, in a direction parallel to the reference axis AX1) from the front end edges of the pair of left and right side surfaces 44a and 44b. It has been found that the extended regions 44aa and 44bb are regions that are not used for forming the respective light distribution patterns P _SPOT , P _MID , and P _WIDE .

As shown in FIG. 67 (b), the lens body 12M of the present modification has a quadrangular pyramid shape in the extension regions 44aa and / or 44bb that are not used to form the respective light distribution patterns P _SPOT , P _MID , and P _WIDE . This corresponds to a lens having a plurality of lens cuts LC (for example, a projection angle of 30 °, a pitch of 5 mm, and a peak height of 3 mm). Otherwise, the configuration is the same as the lens body 12K of the eleventh embodiment. Each lens cut LC may have the same size and the same shape, or may have a different size and a different shape. Moreover, it may be arrange | positioned and may be arrange | positioned at random.

  According to this modification, in addition to the effects of the eleventh embodiment, the following effects can be further achieved.

  That is, when the light source 14 is not turned on, the lens body 12M that looks as if the inside of the lens body is emitting light when viewed from multiple directions, and the vehicular lamp 10M including the lens body 12M. Can be provided. As a result, the visibility when the light source 14 is not turned on (the vehicular lamp 10M, and thus the visibility of the vehicle on which the light is mounted) can be improved.

  This is because the outside light (for example, sunlight) incident on the inside of the lens body 12M from the exit surface 12Kb is inside the lens body 12M (a plurality of quadrangular pyramid-shaped lens cuts LC or the like applied to the extension regions 44aa and 44bb). This is because the light is internally reflected (totally reflected) in various directions and is emitted again in various directions from the emission surface 12Kb.

  The extension regions 44aa and 44bb are not limited to a surface including a plurality of quadrangular pyramid-shaped lens cuts LC, and various external lights are incident on the inside of the lens body 12M from the exit surface 12Kb and reach the extension regions 44aa and 44bb. It may be configured as a surface that is internally reflected (totally reflected) in any direction and then exits again from the exit surface 12Kb. For example, the extension regions 44aa and 44bb may be configured as a surface including a plurality of lens cuts having a polygonal pyramid shape other than the quadrangular pyramid shape, or include a textured surface or a cut surface including a plurality of other minute irregularities. It may be configured as a surface.

  FIG. 68A is a perspective view of a lens combination 16L in which a plurality of lens bodies 12L, which is a first modification of the lens body 12K of the eleventh embodiment, is connected.

  As shown in FIG. 68 (a), the lens combination 16L includes a plurality of lens bodies 12L. The lens coupling body 16L (the plurality of lens bodies 12L) is integrally molded (injection molding) by injecting a transparent resin such as polycarbonate or acrylic into a mold, and cooling and solidifying. The exit surfaces 12Kb of each of the plurality of lens bodies 12L are arranged in a line in the horizontal direction in a state of being adjacent to each other, and form a group of appearance exit surfaces having a sense of unity extending in a line shape in the horizontal direction.

  By using the lens combination body 16L having the above-described configuration, it is possible to configure a vehicular lamp that has a sense of unity and extends in a line shape in the horizontal direction. The lens combination 16L may be formed by molding a plurality of lens bodies 12L in a physically separated state and connecting (holding) them with a holding member (not shown) such as a lens holder.

  In addition, as shown in FIG.68 (b), you may carry out the addition 16La in the clearance gap between each lens body 12L. For example, the lower surface 44d may be extended to close the gap between the lens bodies 12L, or an additional lens portion (as the lower surface 44d and the lower surface 44d may be physically formed as a separate member in the gap between the lens bodies 12L. An additional lens portion including a similar lower surface may be disposed. In this way, external light incident from here is also internally reflected (totally reflected) in various directions by the action of the lower surface 44d (that is, a plurality of lens cuts LC) inside the lens body 12L, and again from the exit surface 12Kb. As a result of the emission, the above “brightness” can be further enhanced.

  Next, a vehicle lamp 10N (lens body 12N) according to a twelfth embodiment will be described with reference to the drawings.

  The vehicular lamp 10N (lens body 12N) of the present embodiment is configured as follows.

69 is a perspective view of the vehicle lamp 10N (lens body 12N), FIG. 70 (a) is a top view, FIG. 70 (b) is a front view, and FIG. 70 (c) is a side view. FIG. 71A shows an example of a low beam light distribution pattern P _LO (synthetic light distribution pattern) formed by the vehicular lamp 10N (lens body 12N), and each part shown in FIGS. 71B to 71E. The distribution light patterns P _SPOT , P _{MID_L} , P _{MID_R} , and P _WIDE are formed to be superimposed.

  The vehicle lamp 10N (lens body 12N) of the present embodiment is a pair of left and right second lower reflecting surfaces 48a, 48b (and the vehicle lamp 10J (lens body 12J) of the tenth embodiment shown in FIG. This corresponds to the addition of shades 48c and 48d). Unlike the tenth embodiment, the final emission surface (second emission surface 12A2b) of the lens body 12N of the present embodiment is a semi-cylindrical surface (cylindrical surface) with a slant angle and / or a camber angle. It is configured. Furthermore, unlike the tenth embodiment, the upper surface 44Nc of the present embodiment functions as an exit surface from which light from the light source 14 that has entered the lens body 12N from the upper entrance surface 42c exits. Other than that, it is the structure similar to the vehicle lamp 10J (lens body 12J) of 10th Embodiment.

As a result of a simulation confirmed by the present inventors, in the vehicular lamp 10J (lens body 12J) of the tenth embodiment, when the relative positional relationship of the lens body 12J with respect to the light source 14 deviates from the design value, FIG. As shown in a), it has been found that glare occurs in the mid light distribution pattern P _MID . 77A occurs when the light source 14 (light emitting surface) is 1 mm square, and the relative positional relationship of the lens body 12J with respect to the light source 14 is shifted from the design value by +0.2 mm in the Y direction (vertical direction). Represents glare.

When the relative positional relationship of the lens body 12J with respect to the light source 14 is as designed, glare does not occur in the mid light distribution pattern P _MID as shown in FIG. 77 (b).

  However, when actually manufacturing a vehicular lamp, it is difficult to make the relative positional relationship of the lens body 12J with respect to the light source 14 as designed due to the effects of assembly errors and the like, and the relative position of the lens body 12J with respect to the light source 14 is difficult. The positional relationship deviates from the design value.

In order to suppress the occurrence of glare in the mid light distribution pattern P _MID due to the relative positional relationship of the lens body 12J with respect to the light source 14 deviating from the design value as described above, As a result of intensive studies, the second optical that forms the mid light distribution pattern P _MID separately from the first lower reflecting surface 12b (and the shade 12c) constituting the first optical system that forms the spot light distribution pattern P _SPOT. By adding a pair of left and right second lower reflecting surfaces 48a and 48b (and shades 48c and 48d) to the system, the light causing the glare is distributed below the cut-off line, so that the light distribution for mid It has been found that the occurrence of glare in the pattern P _MID can be suppressed.

  Based on this knowledge, the vehicular lamp 10N (lens body 12N) of the present embodiment has a pair of left and right second lower reflecting surfaces disposed on the left and right sides separately from the first lower reflecting surface 12b (and the shade 12c). 48a and 48b (and shades 48c and 48d).

  Hereinafter, differences from the vehicular lamp 10J (lens body 12J) of the tenth embodiment will be mainly described, and the same reference numerals are given to the same configurations as the vehicular lamp 10J (lens body 12J) of the tenth embodiment. A description thereof will be omitted.

Similarly to the tenth embodiment, the lens body 12N of the present embodiment has a first optical system (see FIG. _49A ) that forms a spot light distribution pattern P _SPOT (see FIG. _71B ). Further, a second optical system (see FIGS. 73 and 74) for forming mid light distribution patterns P _{MID_L} and P _{MID_R} (see FIGS. 71 (c) and 71 (d)) diffused from the spot light distribution pattern P _SPOT . ) And a third optical system (see FIG. 76) for forming a wide light distribution pattern P _WIDE (see FIG. 71 (e)) diffused from the mid light distribution pattern P _MID .

The lens body 12N of the present embodiment is a lens body that is disposed in front of the light source 14, and, as shown in FIGS. 69 and 70, between the rear end portion, the front end portion, and the rear end portion and the front end portion. The light from the light source 14 incident on the inside of the lens body 12N is emitted from the front end (second emission surface 12A2b) and the upper surface 44Nc and is irradiated forward, including a pair of left and right side surfaces 44a and 44b and an upper surface 44Nc. As a result, as shown in FIG. _71A , the lens body is configured to form a low beam light distribution pattern P _Lo including a cutoff line at the upper end edge.

  Specifically, the lens body 12N includes a first rear end portion 12A1aa, a first front end portion 12A1bb, a pair of left and right side surfaces 44a, 44b disposed between the first rear end portion 12A1aa and the first front end portion 12A1bb, And a first lens portion 12A1 including a first lower reflection surface 12b disposed between the first rear end portion 12A1aa and the first front end portion 12A1bb, and disposed in front of the first lens portion 12A1, and the second rear A second lens portion 12A2 including an end portion 12A2aa and a second front end portion 12A2bb; a connecting portion 12A3 connecting the first lens portion 12A1 and the second lens portion 12A2; and a first rear portion of the first lens portion 12A1. The upper surface 44Nc disposed between the end portion 12A1aa and the second front end portion 12A2bb of the second lens portion 12A2, and the first rear end portion 12A1aa of the first lens portion 12A1aa Between 1 front end 12A1bb and is configured as a lens body including a second lower reflective surface 48a of the pair which is disposed on the left and right sides of the first lower reflection surface 12b, and 48b.

  The lens body 12N of the present embodiment is integrally molded by injecting a transparent resin such as polycarbonate and acrylic, cooling, and solidifying (by injection molding) as in the above embodiments.

  72A is a front view of the first rear end portion 12A1aa of the first lens portion 12A1, and FIG. 72B is a cross-sectional view (schematic diagram) along BB in FIG. 72A. In addition, the AA sectional view (schematic diagram) in FIG. 72 (a) is the same as FIG. 50 (b).

  As shown in FIGS. 50 and 72 (a), the first rear end portion 12A1aa of the first lens portion 12A1 is provided on the first incident surface 12a and the left and right sides of the first incident surface 12a. It includes a pair of left and right incident surfaces 42a and 42b disposed so as to surround the space between the light source 14 and the first incident surface 12a disposed in the vicinity from both the left and right sides. As shown in FIGS. 72 (a) and 72 (b), the first rear end portion 12A1aa further includes a space between the light source 14 and the first incident surface 12a on the upper side of the first incident surface 12a. The upper entrance surface 42c is disposed so as to surround the surface.

  The front end portion of the first lower reflecting surface 12b includes a shade 12c.

  As shown in FIG. 69, the first front end portion 12A1bb of the first lens portion 12A1 has a semi-cylindrical first emission surface 12A1a (in the first semi-cylindrical surface of the present invention) extending in the vertical direction or the substantially vertical direction. And a pair of left and right exit surfaces 46a and 46b (corresponding to a pair of left and right intermediate exit surfaces of the present invention) disposed on the left and right sides of the first exit surface 12A1a.

  The second rear end portion 12A2aa of the second lens portion 12A2 includes a second incident surface 12A2a (corresponding to the intermediate incident surface of the present invention), and the second front end portion 12A2bb of the second lens portion 12A2 is the second emission surface 12A2b. (Corresponding to the final emission surface of the present invention).

Unlike the tenth embodiment, the final emission surface (second emission surface 12A2b) is configured as a semi-cylindrical surface with a slant angle and / or a camber angle. Accordingly, the cylindrical axis (and the focal line F _12A2b ) of the final emission surface (second emission surface _12A2b ) is inclined with respect to the horizontal. The slant angle and / or camber angle is given by the method described in the fifth to seventh embodiments. And the said blur and rotation which generate | occur | produce with provision of a slant angle and / or a camber angle are improved and suppressed by the method demonstrated in 5th-7th embodiment.

Of course, the present invention is not limited to this, and the final exit surface (second exit surface 12A2b) is not provided with a slant angle and / or camber angle, that is, a half of which the cylinder axis (and the focal line F _12A2b ) extends in the horizontal direction. It may be configured as a cylindrical surface.

  The connecting part 12A3 includes the first lens part 12A1 and the second lens part 12A2 at the upper part thereof, the first front end part 12A1bb of the first lens part 12A1, the second rear end part 12A2aa of the second lens part 12A2, and the connecting part. The space S surrounded by the portion 12A3 is connected in a formed state.

As shown in FIG. 49A, the first incident surface 12a, the first lower reflecting surface 12b (and the shade 12c), the first semi-cylindrical surface (first emission surface 12A1a), the intermediate incident surface (second The entrance surface 12A2a) and the final exit surface (second exit surface 12A2b) are partially shielded by the shade 12c of the first lower reflection surface 12b out of the light from the light source 14 that has entered the lens body 12N from the first entrance surface 12a. The light and the light internally reflected by the first lower reflection surface 12b are emitted from the first semi-cylindrical surface (first emission surface 12A1a) to the outside of the lens body 12N, and further, the intermediate incidence surface (second The incident surface 12A2a) enters the inside of the lens body 12N, exits from the final exit surface (second exit surface 12A2b), and is irradiated forward, so that the upper end edge is defined by the shade 12c of the first lower reflecting surface 12b. Cut Spot light distribution pattern P _SPOT containing fline constitute a first optical system for forming a (corresponding to the light converging pattern of the present invention).

With the first optical system configured as described above, the spot light distribution pattern P _SPOT shown in FIG. _71B is formed on the virtual vertical screen.

  FIG. 73 is a transverse sectional view (only the main optical surface) of the second optical system, and FIG. 74 is a longitudinal sectional view (only the main optical surface).

73 and 74, a pair of left and right entrance surfaces 42a and 42b, a pair of left and right side surfaces 44a and 44b, a pair of left and right second lower reflecting surfaces 48a and 48b (and shades 48c and 48d), and a pair of left and right middles. The exit surfaces (the pair of left and right exit surfaces 46a and 46b), the intermediate entrance surface (the second entrance surface 12A2a), and the final exit surface (the second exit surface 12A2b) are located inside the lens body 12N from the pair of left and right entrance surfaces 42a and 42b. Of the light from the light source 14 that is incident and internally reflected by the pair of left and right side surfaces 44a and 44b, the light partially blocked by the shades 48c and 48d of the pair of left and right second lower reflecting surfaces 48a and 48b and the pair of left and right first (2) The light internally reflected by the lower reflecting surfaces 48a and 48b is emitted to the outside of the lens body 12N from a pair of left and right intermediate emission surfaces (a pair of left and right emission surfaces 46a and 46b), and is further incident intermediately. 71 (c) and 71 (d) are shown in FIG. 71 (c) and FIG. 71 (d) by being incident on the inside of the lens body 12N from the (second incident surface 12A2a), emitted from the final emission surface (second emission surface 12A2b), and irradiated forward. as shown, is superimposed on the spot light distribution pattern P _sPOT, mid light distribution pattern P _{MID_L} diffused from the light distribution pattern P _sPOT spot, to form a P _{MID_R} (corresponding to the first diffusion pattern of the present invention) A pair of left and right second optical systems is configured.

  The pair of left and right second lower reflecting surfaces 48a and 48b are planar reflecting surfaces extending forward from the lower end edges (or in the vicinity of the lower end edges) of the pair of left and right incident surfaces 42a and 42b. FIG. 75 is an enlarged perspective view of the vicinity of the second lower reflecting surface 48a (and the shade 48c) disposed on the left side. The front ends of the pair of left and right second lower reflecting surfaces 48a and 48b include shades 48c and 48d.

The pair of left and right second lower reflection surfaces 48a and 48b are reflection surfaces that totally reflect the light incident on the pair of left and right second lower reflection surfaces 48a and 48b out of the light from the light source 14 that has entered the lens body 12N. Metal deposition is not used. Of the light from the light source 14 that has entered the lens body 12N, the light that has entered the pair of left and right second lower reflecting surfaces 48a and 48b is internally reflected by the pair of left and right second lower reflecting surfaces 48a and 48b and finally emitted. It goes to the surface (second emission surface 12A2b), refracts at the final emission surface (second emission surface 12A2b), and goes to the road surface direction. That is, the reflected light internally reflected by the pair of left and right second lower reflecting surfaces 48a and 48b is folded back at the cutoff line and superimposed on the light distribution pattern below the cutoff line. As a result, a cut-off line is formed at the upper edge of the mid light distribution patterns P _{MID_L} and P _{MID_R} (see FIGS. 71 (c) and 71 (d)).

The positions of the shades 48c and 48d at which the cut-off _lines of the mid light distribution patterns P _{MID_L} and P _{MID_R} are appropriately formed vary depending on conditions such as the slant angle and / or the camber angle. Have difficulty.

However, for example, using predetermined simulation software, the positions of the shades 48c and 48d with respect to the focal line F _12A2b (see FIG. 73) of the final emission surface (second emission surface 12A2b) are gradually changed. mid light distribution pattern P _{MID_L,} by checking the P _{MID_R,} shade 48c to mid light distribution pattern P _{MID_L,} is cut-off line P _{MID_R} is properly formed, it is possible to find the position of 48d.

The pair of left and right entrance surfaces 42a and 42b is refracted by light (mainly light Ray _MID spreading in the left and right direction, see FIG. _50B ) that does not enter the first entrance surface 12a among the light from the light source 14. As shown in FIG. 50 (b), the surface incident on the inside of one lens portion 12 </ b> A <b> 1 is configured as a curved surface (for example, a free curved surface) convex toward the light source 14.

  Specifically, the pair of left and right incident surfaces 42a and 42b mainly enters the lens body 12N from the pair of left and right incident surfaces 42a and 42b and is internally reflected by the pair of left and right side surfaces 44a and 44b. From the pair of left and right second lower reflecting surfaces 48a and 48b in the vicinity of the shades 48c and 48d (see FIG. 74) and diffuse in the horizontal direction (see FIG. 73). Further, the surface shape is configured.

  For example, in FIG. 73, the left incident surface 42a has a second left lower reflection with respect to the vertical direction when light from the light source 14 incident on the lens body 12N from the left incident surface 42a and internally reflected by the left surface 44a. The surface shape is configured such that the light is condensed near the shade 48c of the surface 48a (see FIG. 74) and diffused without condensing in the horizontal direction (see FIG. 73).

  On the other hand, in FIG. 73, the right incident surface 42b reflects light from the light source 14 that has entered the lens body 12N from the right incident surface 42b and is internally reflected by the right side surface 44b with respect to the vertical direction. The light is condensed near the shade 48d of the surface 48b (see FIG. 74) and is condensed near the final light exit surface (second light exit surface 12A2b) in the horizontal direction, and then diffused (see FIG. 73). The surface shape is configured.

With the second optical system configured as described above, the mid light distribution patterns P _{MID_L} and P _{MID_R} shown in FIGS. _71C and _71D are formed on the virtual vertical screen.

The inventor adds the pair of left and right second lower reflecting surfaces 48a and 48b (and shades 48c and 48d) as described above, so that the relative positional relationship of the lens body 12N with respect to the light source 14 can be changed from the design value. It was confirmed by simulation that the glare can be suppressed from occurring in the mid light distribution pattern P _MID (P _{MID_L} , P _{MID_R} ) even if it is shifted in this direction.

Incidentally, the light distribution pattern P _{MID_R} for mid shown in the light distribution pattern P _{MID_L} and Figure 71 (d) for mid shown in FIG. 71 (c) is not symmetrical to each other, the final output surface (second exit surface 12A2b ) Is configured as a semi-cylindrical surface having a slant angle and / or a camber angle. The final emission surface (second emission surface 12A2b) is configured as a semi-cylindrical surface with no slant angle and / or camber angle, that is, the cylinder axis (and the focal line F _12A2b ) extending in the horizontal direction. In this case, the mid light distribution pattern P _{MID_L} and the mid light distribution pattern P _{MID_R} are symmetrical to each other.

  FIG. 76 is a side view of the third optical system (only the main optical surface).

As shown in FIG. 76, the upper incident surface 42c and the upper surface 44Nc are formed by the light from the light source 14 that has entered the lens body 12N from the upper incident surface 42c emitted from the upper surface 44Nc and irradiated forward. As shown in 71 (e), the light distribution pattern for wide that is diffused from the light distribution patterns for the mid _{PMID_L} and P _{MID_R} and superimposed on the light distribution pattern for the spot P _SPOT and the light distribution patterns for the mid _{PMID_L} and P _{MID_R} A third optical system for forming P _WIDE (corresponding to the second diffusion pattern of the present invention) is configured.

The wide light distribution pattern P _WIDE is a light distribution pattern having a shape including a recess recessed downward in the vicinity of the center of the upper edge. The reason is as follows.

When the inventor confirmed by simulation, when the relative positional relationship of the lens body 12N with respect to the light source 14 deviates from the design value (for example, when the lens body 12N deviates vertically from the light source 14), FIG. As indicated by a dotted line in 78, the wide light distribution pattern P _WIDE moves vertically upward as a whole. As a result, glare occurs in the area near the intersection of the H line and the V line (the area where the preceding vehicle and the oncoming vehicle exist). It was found to occur. FIG. 78 shows that glare occurs when the relative positional relationship of the lens body 12N with respect to the light source 14 deviates from the design value in the Y direction (vertical direction).

When the relative positional relationship of the lens body 12N with respect to the light source 14 is as designed, the wide light distribution pattern P _WIDE is formed at an appropriate position as shown in FIG. 71 (e), so that no glare occurs. .

  However, when a vehicle lamp (lens body) is actually manufactured, it is difficult to make the relative positional relationship of the lens body 12N with respect to the light source 14 as designed due to the influence of assembly errors and the like. The relative positional relationship of 12N deviates from the design value.

As described above, the present inventor has caused the relative positional relationship of the lens body 12N with respect to the light source 14 to deviate from the design value, and the wide light distribution pattern P _WIDE moves vertically upward as a whole. As a result of intensive studies to suppress the occurrence of glare in the area near the intersection of the H line and the V line (area where the preceding vehicle and the oncoming vehicle exist), the wide light distribution pattern P _WIDE By forming a light distribution pattern having a concave portion that is recessed downward in the vicinity, even if the wide light distribution pattern P _WIDE moves vertically upward as a whole, the region in the vicinity of the intersection of the H line and the V line It has been found that glare can be prevented from occurring in a region where there is a preceding vehicle or an oncoming vehicle.

Based on this knowledge, the wide light distribution pattern P _WIDE is a light distribution pattern having a shape including a concave portion in which the vicinity of the center of the upper edge is recessed downward.

The wide light distribution pattern P _WIDE having a concave portion in which the vicinity of the center of the upper end edge is recessed downward can be formed as follows.

The upper incident surface 42c refracts light that is not incident on the first incident surface 12a out of the light from the light source 14 (mainly light Ray _WIDE spreading upward, see FIG. 72B) and refracts the first lens portion 12A1. As shown in FIG. 72B, the surface that enters the inside is configured as a curved surface (for example, a free curved surface) that is convex toward the light source 14.

  Unlike the tenth embodiment, the upper surface 44Nc extends from the front end (second front end 12A2bb) side to the rear end (first rear end 12A1aa) side of the lens body 12N, as shown in FIGS. It is arranged in a posture inclined obliquely upward, and functions as an exit surface from which light from the light source 14 incident on the inside of the lens body 12N from the upper entrance surface 42c is emitted. The upper surface 44Nc is configured as a planar surface. Of course, the present invention is not limited to this, and the upper surface 44c may be configured as a curved surface.

As shown in FIG. 71 (e), the upper incident surface 42 c and / or the upper surface 44 Nc is formed with a wide light distribution pattern P _WIDE having a shape including a recess recessed downward in the vicinity of the center of the upper edge. The surface shape is configured.

The wide light distribution pattern P _WIDE shown in FIG. 71 (e) is formed on the virtual vertical screen by the third optical system having the above configuration.

  According to the present embodiment, in addition to the effects of the tenth embodiment, the following effects can be further achieved.

That is, it is possible to realize an appearance with a sense of unity extending in a line in a predetermined direction, and a plurality of light distribution patterns (spot light distribution pattern P _SPOT , mid light distribution pattern P _{MID_L} , P _{MID_R,} etc.) A lens body 12N that can be formed can be provided. In order to achieve this effect, it is sufficient that the first optical system and the second optical system are provided at the minimum, and the third optical system can be omitted as appropriate.

  The reason why it is possible to realize a unity appearance extending in a line in a predetermined direction is that the final emission surface (second emission surface 12A2b) is configured as a semi-cylindrical surface (a semi-cylindrical refractive surface). It is.

A plurality of light distribution patterns (spot light distribution pattern P _SPOT , mid light distribution pattern P _{MID_L} , P _{MID_R,} etc.) can be formed by a single lens body 12N, that is, a plurality of optical systems. This is because the first optical system for forming the spot light distribution pattern P _SPOT and the second optical system for forming the mid light distribution patterns P _{MID_L} and P _{MID_R} are provided.

Further, according to the present embodiment, even if the relative positional relationship of the lens body 12N with respect to the light source 14 is deviated from the design value due to the influence of the assembly error or the like, the mid light distribution pattern P _MID (P _{MID_L} , P _{MID_R} ) Can suppress the occurrence of glare. This is because the second optical system for forming the mid light distribution pattern P _MID (P _{MID_L} , P _{MID_R} ) _includes a pair of left and right second lower reflecting surfaces 48a and 48b (and shades 48c and 48d). It is.

Further, according to the present embodiment, even if the relative positional relationship of the lens body 12N with respect to the light source 14 deviates from the design value due to the influence of the assembly error or the like, the wide light distribution pattern P _WIDE moves vertically upward. The occurrence of glare can be suppressed. This is because the wide light distribution pattern P _WIDE is formed as a light distribution pattern having a shape including a concave portion in which the center of the upper end edge is recessed downward. In order to achieve this effect, at least the third optical system may be provided, and the first optical system and / or the second optical system can be omitted as appropriate.

  Next, a modified example of the lens body 12N will be described. This modification corresponds to the lens body 12N using the upper surface 44c of the tenth embodiment instead of the upper surface 44Nc and further adding the second emission surface 12A2b (extended region 12A2b4) of the tenth embodiment.

In this modification, as shown in FIG. 49 (c), the upper incident surface 42c, the upper surface 44c, and the second emission surface 12A2b (extension region 12A2b4) enter the lens body 12N from the upper incident surface 42c and enter the upper surface 44c. As shown in FIG. 71 (e), the light Ray _WIDE from the light source 14 that has been internally reflected by the light is emitted from the second light exit surface 12A2b (extension region 12A2b4) and irradiated forward. A third optical system is formed which forms a wide light distribution pattern P _WIDE diffused from the mid light distribution patterns P _{MID_L} and P _{MID_R} superimposed on the pattern P _SPOT and the mid light distribution patterns P _{MID_L} and P _{MID_R} .

The surface shape of the upper incident surface 42c and / or the upper surface 44c is configured such that a wide light distribution pattern P _WIDE having a concave portion in which the vicinity of the center of the upper end edge is recessed downward is formed. For example, the region near the center in the left-right direction is made to be lower than the regions on the left and right sides so that the reflected light from the region near the center in the left-right direction of the upper surface 44c is irradiated downward. Tilt down (or dent). As a result, as shown in FIG. 71 (e), it is possible to form a wide light distribution pattern P _WIDE having a shape including a concave portion in which the center of the upper edge is recessed downward.

  Also according to this modification, the same effects as in the twelfth embodiment can be obtained.

  Next, as a thirteenth embodiment, a vehicle lamp 60 (lens body 62) that forms a high beam light distribution pattern will be described with reference to the drawings.

79A is a longitudinal sectional view of the vehicular lamp 60 (lens body 62), and FIG. 79B is a front view. FIG. 80A shows an example of a high beam light distribution pattern P _Hi (combined light distribution pattern) formed by the vehicular lamp 60 (lens body 62), and is shown in FIGS. 80B and 80C. Each _partial light distribution pattern P _{Hi_SPOT} , P _{Hi_WIDE} is formed by being superimposed. The spot light distribution pattern P _{Hi_SPOT} corresponds to the light collection pattern of the present invention, and the wide light distribution pattern P _{Hi_WIDE} corresponds to the diffusion pattern of the present invention.

As shown in FIG. 79, the vehicular lamp 60 of this embodiment includes a light source 14, a lens body 62 disposed in front of the light source 14, and the like, and a virtual vertical screen (about 25 m from the front of the vehicle) facing the front of the vehicle. A high beam light distribution pattern P _Hi shown in FIG. 80 (a) is formed on the front).

Light source 14 is disposed at the rear end portion 62a near the lens body 62 in a posture with its the emission surface to the front (the reference point F ₆₂ near the optical design). Optical axis AX ₁₄ of the light source 14 may be coincident with the reference axis AX ₆₂ extending in the longitudinal direction of the vehicle, it may be inclined with respect to the reference axis AX _62.

The lens body 62 is a lens body disposed in front of the light source 14, and includes a rear end portion 62a and a front end portion 62b. Light from the light source 14 incident on the inside of the lens body 62 is transmitted to the front end portion 62b (for wide use). A lens for forming a high beam light distribution pattern P _Hi shown in FIG. 80A by being emitted from the light distribution pattern emission surface 62b1 and the spot light distribution pattern emission surface 62b2) and irradiated forward. It is structured as a body. The lens body 62 is integrally formed by injecting a transparent resin such as polycarbonate or acrylic, cooling, and solidifying (by injection molding).

Lens body 62, a first optical system for forming a spot light distribution pattern P _{Hi_SPOT} than diffuse wide light distribution pattern P _{Hi_WIDE} (see FIG. 80 (b)), and the spot light distribution pattern P _{Hi_SPOT} (Figure 80 (C) is provided.

  The rear end portion 62a of the lens body 62 reflects the light from the light source 14 that has entered the lens body 62 from the incident surface A for the wide light distribution pattern and the incident surface A for the wide light distribution pattern. The light distribution pattern 62a3 for the wide light distribution pattern, the incident surface 62a5 for the spot light distribution pattern, and the light from the light source 14 that has entered the lens body 62 from the incident surface 62a5 for the spot light distribution pattern. It includes a reflecting surface 62a6 for a spot light distribution pattern that is internally reflected.

  As shown in FIG. 79A, the incident surface A for the wide light distribution pattern extends backward from the outer peripheral edge of the first incident surface 62a1 and the first incident surface 62a1 that are convex toward the light source 14. A cylindrical second incident surface 62a2 is included that surrounds a range other than the notch 62a4 through which light from the light source 14 passes in the space between the light source 14 and the first incident surface 62a1.

  The reflection surface 62a3 for the wide light distribution pattern is disposed outside the second incident surface 62a2, and is a reflection that internally reflects (totally reflects) the light from the light source 14 that has entered the lens body 62 from the second incident surface 62a2. Surface.

  FIG. 81 is a front view of the rear end portion 62a of the lens body 62 (the vicinity of the first incident surface 62a1, the second incident surface 62a2, and the reflection surface 62a3 for the wide light distribution pattern).

  Of the space between the light source 14 and the first incident surface 62a1, the range of the angle θ1 shown in FIG. 81 is surrounded by the second incident surface 62a2 (and the reflecting surface 62a3 for the wide light distribution pattern). The range of the angle θ2 is not surrounded by the second incident surface 62a2 (and the reflection surface 62a3 for the wide light distribution pattern), and constitutes a fan-shaped notch 62a4 through which light from the light source 14 passes.

Incidentally, as shown in FIG. 82, the range of angle θ2 is, the reference axis AX ₆₂ dimension is not surrounded by the relatively short second light incident surface 62a2 (and the reflecting surfaces 62a3 of the light distribution pattern for wide) Also good.

  As shown in FIG. 79A, the incident surface 62a5 for the spot light distribution pattern has a concave incident toward the light source 14 where the light from the light source 14 that has passed through the notch 62a4 enters the lens body 62. Surface.

  The reflecting surface 62a6 for the spot light distribution pattern is disposed outside the incident surface 62a5 for the spot light distribution pattern, and is reflected from the light source 14 that has entered the lens body 62 from the incident surface 62a5 for the spot light distribution pattern. It is a reflective surface that reflects light internally (total reflection).

  The front end portion 62b of the lens body 62 includes an exit surface 62b1 for a wide light distribution pattern and an exit surface 62b2 for a spot light distribution pattern disposed below the front surface 62b1.

The first optical system that forms the wide light distribution pattern P _{Hi_WIDE} (see FIG. _80B ) is configured as follows.

As shown in FIG. 79 (a), the incident surface A for the wide light distribution pattern (first incident surface 62a1 and second incident surface 62a2), the reflective surface 62a3 for the wide light distribution pattern, and the wide light distribution pattern. The light pattern exit surface 62b1 is configured so that light from the light source 14 incident on the inside of the lens body 62 from the entrance surface A for the wide light distribution pattern (the first entrance surface 62a1 and the second entrance surface 62a2) is distributed for wide use. The first optical system is configured to emit from the light pattern emission surface 62b1 and irradiate forward to form the wide light distribution pattern P _{Hi_WIDE} .

Specifically, the first incident surface 62a1, the second incident surface 62a2, the reflective surface 62a3 for the wide light distribution pattern, and the output surface 62b1 for the wide light distribution pattern are arranged from the first incident surface 62a to the lens body. The light from the light source 14 incident on the inside of the light source 62 and the light source 14 incident on the inside of the lens body 62 from the second incident surface 62a and internally reflected (totally reflected) by the reflecting surface 62a3 for the wide light distribution pattern. Light is emitted from the exit surface 62b1 for the wide light distribution pattern, and is irradiated forward to form the first optical system that forms the wide light distribution pattern P _{Hi_WIDE} .

The exit surface 62b1 for the wide light distribution pattern is configured as a semi-cylindrical surface (cylindrical surface) in which the cylinder axis extends in the horizontal direction (a direction orthogonal to the middle paper surface in FIG. 79A). The focal line of the exit surface 62b1 for the wide light distribution pattern extends in the horizontal direction (the direction perpendicular to the paper surface in FIG. 79 (a)) at the position indicated by reference numeral _F62b1 in FIG. 79 (a). Of course, the present invention is not limited to this, and the exit surface 62b1 for the wide light distribution pattern may be configured as a semi-cylindrical surface (cylindrical surface) with a slant angle and / or a camber angle.

The first incident surface 62a1 is a surface on which light from the light source 14 is refracted and is incident on the inside of the lens body 62, and is configured as a curved surface (for example, a free curved surface) convex toward the light source 14. Specifically, the first incident surface 62a1 is configured such that the light from the light source 14 that has entered the lens body 62 from the first incident surface 62a1 is focused on the exit surface 62b1 for the wide light distribution pattern in the vertical direction. F _62b1 is condensed (see FIG. 79 (a)), and diffused in the horizontal direction (see FIG. 83 (a)) (or collimated), and the surface shape is configured. ing.

  The second incident surface 62a2 is a surface in which light that does not enter the first incident surface 62a1 out of the light from the light source 14 is refracted and is incident on the inside of the lens body 62. It is configured as a cylindrical surface (for example, a free-form surface) that extends and surrounds a range other than the cutout portion 62a4 through which light from the light source 14 passes in the space between the light source 14 and the first incident surface 62a1. Yes.

The wide light distribution pattern reflecting surface 62a3 is disposed outside the second incident surface 62a2, and is a surface that internally reflects (totally reflects) light from the light source 14 that has entered the lens body 62 from the second incident surface 62a2. It is configured as. The reflection surface 62a3 for the wide light distribution pattern is a reflection surface that internally reflects (totally reflects) the light from the light source 14 that has entered the lens body 62 from the second incident surface 62a2, and does not use metal deposition. Specifically, the reflection surface 62a3 for the wide light distribution pattern enters the lens body 62 from the second incident surface 62a2 and is internally reflected (totally reflected) by the reflection surface 62a3 for the wide light distribution pattern. The light from the light source 14 is condensed near the focal line F _62b1 of the emission surface 62b1 for the wide light distribution pattern in the vertical direction (see FIG. _79A ) and diffused in the horizontal direction ( As shown in FIG. 83 (a)) (or so as to be collimated), the surface shape is configured.

With the first optical system configured as described above, a wide light distribution pattern P _{Hi_WIDE} shown in FIG. _80B is formed on the virtual vertical screen.

That is, the light from the light source 14 that has entered the lens body 62 from the first incident surface 62a1 and the inner surface reflected by the reflecting surface 62a3 for the wide light distribution pattern that has entered the lens body 62 from the second incident surface 62a2. The light from the light source 14 (totally reflected) is condensed (see FIG. _{79A) in the} vicinity of the focal line F _62b1 of the emission surface 62b1 for the light distribution pattern for wide in the vertical direction, and then distributed for wide. The light is emitted from the light pattern emission surface 62b1. At that time, the light from the light source 14 emitted from the emitting surface 62b1 of the light distribution pattern for wide by the action of the exit surface 62b1 of the light distribution pattern for wide is condensed relates vertically, the reference axis AX ₆₂ A wide light distribution pattern P _{Hi_WIDE} shown in FIG. _80B is formed by irradiating forward as light diffused in the horizontal direction and parallel to the horizontal direction.

The second optical system for forming the spot light distribution pattern P _{Hi_SPOT} (see FIG. 80C) is configured as follows.

As shown in FIG. 79 (a), the incident surface 62a5 for the spot light distribution pattern, the reflection surface 62a6 for the spot light distribution pattern, and the exit surface 62b2 for the spot light distribution pattern include the spot light distribution. Light from the light source 14 that has entered the lens body 62 from the pattern incident surface 62a5 and is internally reflected by the reflecting surface 62a6 for the spot light distribution pattern is emitted from the output surface 62b2 for the spot light distribution pattern. The second optical system is configured to form the spot light distribution pattern P _{Hi_SPOT} by being irradiated forward.

Specifically, the incident surface 62a5 for the spot light distribution pattern, the reflection surface 62a6 for the spot light distribution pattern, and the exit surface 62b2 for the spot light distribution pattern pass through the notch 62a4, and the spot The light from the light source 14 incident on the inside of the lens body 62 from the incident surface 62a5 for the light distribution pattern for light and internally reflected (totally reflected) by the reflection surface 62a6 for the light distribution pattern for spot is used for the light distribution pattern for spot The second optical system forms a spot light distribution pattern P _{Hi_SPOT} by being emitted from the emission surface 62b2 and irradiated forward.

Exit surface 62b2 of the light distribution pattern for spot is configured as a surface of a planar shape perpendicular to the reference axis AX _62. Of course, the present invention is not limited to this, and the exit surface 62b2 for the spot light distribution pattern may be configured as a curved surface. Further, as shown in FIG. 84, the spot light distribution pattern exit surface 62b2 may be configured as a planar or curved surface that is continuous with the lower end edge of the wide light distribution pattern exit surface 62b1. Good.

  The exit surface 62b2 for the spot light distribution pattern is disposed at a position behind the exit surface 62b1 for the wide light distribution pattern (see FIG. 79A). Of course, the present invention is not limited to this, and the exit surface 62b2 for the spot light distribution pattern is disposed in front of the exit surface 62b1 for the wide light distribution pattern or at the same position as the exit surface 62b1 for the wide light distribution pattern. May be.

The spot light distribution pattern incident surface 62 a 5 is a surface on which light from the light source 14 enters the lens body 62, and is configured as a concave curved surface toward the light source 14. Specifically, the incident surface 62a5 of the light distribution pattern for spot (to be exact, the reference point F ₆₂₎ the light source 14 is configured as a surface of a spherical shape centered at. Thereby, the Fresnel reflection loss when the light from the light source 14 enters the lens body 62 from the incident surface 62a5 for the spot light distribution pattern can be suppressed. Of course, the present invention is not limited to this, and the incident surface 62a5 for the spot light distribution pattern may be configured as a surface (for example, a free-form surface) other than the spherical surface with the light source 14 as the center.

The reflecting surface 62a6 for the spot light distribution pattern is disposed outside the incident surface 62a5 for the spot light distribution pattern, and is reflected from the light source 14 that has entered the lens body 62 from the incident surface 62a5 for the spot light distribution pattern. It is configured as a surface that internally reflects light (total reflection). The spot light distribution pattern reflective surface 62a6 is a reflective surface that internally reflects (totally reflects) the light from the light source 14 that has entered the lens body 62 from the spot light distribution pattern incident surface 62a5. Not used. Specifically, the reflecting surface 62a6 for the spot light distribution pattern is incident on the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern, and is internally reflected by the reflecting surface 62a6 for the spot light distribution pattern. The light from the light source 14 that has been (totally reflected) and emitted from the exit surface 62b2 for the spot light distribution pattern is collimated in the vertical direction (see FIG. 79A) and collimated in the horizontal direction. As shown in FIG. 83B, the surface shape is configured. As the reflective surface 62a6 of the light distribution pattern for a spot, for example, focus (to be exact, the reference point F ₆₂₎ the light source 14 can be used a reflecting surface of the parabolic system set in the vicinity.

With the second optical system configured as described above, a spot light distribution pattern P _{Hi_SPOT} shown in FIG. _80C is formed on the virtual vertical screen.

That is, the light source 14 passes through the notch 62a4, enters the inside of the lens body 62 from the incident surface 62a5 for the spot light distribution pattern, and is internally reflected (totally reflected) by the reflection surface 62a6 for the spot light distribution pattern. Is collimated in the vertical direction and the horizontal direction, and then exits from the exit surface 62b2 for the spot light distribution pattern. At that time, the light from the light source 14 emitted from the emitting surface 62b2 of the light distribution pattern for spot is configured as a surface of a planar shape exit surface 62b2 of the light distribution pattern for spot perpendicular to the reference axis AX ₆₂ Therefore, the spot light distribution pattern P _{Hi_SPOT} shown in FIG. _80C is formed by irradiating forward as light parallel to the reference axis AX ₆₂ in the vertical direction and the horizontal direction.

The spot light distribution pattern P _{Hi_SPOT} is more concentrated than the wide light distribution pattern P _{Hi_WIDE} and has a higher luminous intensity. As a result, the high beam light distribution pattern P _Hi (synthetic light distribution pattern) formed by superimposing the spot light distribution pattern P _{Hi_SPOT} and the wide light distribution pattern P _{Hi_WIDE} has a high central luminous intensity and is far distantly visible. It will be excellent.

The becomes light distribution pattern P _{Hi_SPOT} spot is focused from the light distribution pattern P _{Hi_WIDE} for wide it is parallel to the reference axis AX ₆₂ wide light distribution pattern P _{Hi_WIDE} is relates vertical direction, the horizontal direction This is because the spot light distribution pattern P _{Hi_SPOT} is formed of light parallel to the reference axis AX _{62 in the} vertical and horizontal directions.

The intensity of the light distribution pattern P _{Hi_SPOT} spot is higher than the light distribution pattern P _{Hi_WIDE} for the wide, the light source 14 and the reflective surface 62a6 of the light distribution pattern for spots (and / or the incident surface of the light distribution pattern for spot 62a5 ) Is set longer than the distance between the light source 14 and the reflection surface 62a3 for the wide light distribution pattern (and / or the incident surfaces 62a1 and 62a2 for the wide light distribution pattern). _Therefore , in the second optical system that forms the spot light distribution pattern P _{Hi_SPOT} , the light source image of the light source 14 is relatively small compared to the first optical system that forms the wide light distribution pattern P _{Hi_WIDE} . This is because the spot light distribution pattern P _{Hi_SPOT} is formed with this relatively small light source image.

That is, as shown in FIG. 79 (a), in the first optical system in which the distance W between the light source 14 and the reflection surface 62a3 for the wide light distribution pattern is relatively short, the light source image of the light source 14 is large. Therefore, it is suitable for the wide light distribution pattern P _{Hi_WIDE} . On the other hand, in the second optical system in which the distance S between the light source 14 and the reflecting surface 62a6 for the spot light distribution pattern is relatively long, the light source image of the light source 14 becomes small, and thus the spot light distribution pattern P _{Hi_SPOT.} Suitable for

Note that by adjusting the angles θ1 and θ2 shown in FIG. 81, the balance between the luminous intensity of the spot light distribution pattern P _{Hi_SPOT and} the luminous intensity of the wide light distribution pattern P _{Hi_WIDE} can be adjusted.

  The lens body 62 of the present embodiment can also be used upside down as shown in FIG.

  According to the present embodiment, the following effects can be achieved.

That is, it is possible to provide a lens body 62 that can form a high beam light distribution pattern P _Hi (synthetic light distribution pattern) on which a spot light distribution pattern P _{Hi_SPOT} and a wide light distribution pattern P _{Hi_WIDE} are superimposed. Can do.

This is because one lens body 62 _includes a first optical system that forms the wide light distribution pattern P _{Hi_WIDE} and a second optical system that forms the spot light distribution pattern P _{Hi_SPOT} .

Further, according to the present embodiment, as a _result of the luminous intensity of the spot light distribution pattern P _{Hi_SPOT} being higher than that of the wide light distribution pattern P _{Hi_WIDE} , the spot light distribution pattern P _{Hi_SPOT} and the wide light distribution pattern P _{Hi_WIDE} are superimposed. Thus, the high beam light distribution pattern P _Hi (synthetic light distribution pattern) formed in this way has a high central luminous intensity and excellent distant visibility.

The intensity of the light distribution pattern P _{Hi_SPOT} spot is higher than the light distribution pattern P _{Hi_WIDE} for the wide, the light source 14 and the reflective surface 62a6 of the light distribution pattern for spots (and / or the incident surface of the light distribution pattern for spot 62a5 ) Is set longer than the distance between the light source 14 and the reflection surface 62a3 for the wide light distribution pattern (and / or the incident surfaces 62a1 and 62a2 for the wide light distribution pattern). _Therefore , in the second optical system that forms the spot light distribution pattern P _{Hi_SPOT} , the light source image of the light source 14 is relatively small compared to the first optical system that forms the wide light distribution pattern P _{Hi_WIDE} . This is because the spot light distribution pattern P _{Hi_SPOT} is formed with this relatively small light source image.

  Next, a lens body 62A that is a modification of the lens body 62 will be described.

  FIG. 86 is a longitudinal sectional view of the lens body 62A.

  In the lens body 62A of this modification, the exit surface 62b1 for the wide light distribution pattern is configured as a planar surface.

  The first incident surface 62a1 is collimated in the vertical direction with respect to the light from the light source 14 that enters the lens body 62A from the first incident surface 62a1 and exits from the exit surface 62Ab1 for the wide light distribution pattern. And the surface shape is comprised so that it may spread | diffuse regarding a horizontal direction. The reflection surface 62a3 for the wide light distribution pattern is incident on the inside of the lens body 62A from the second incident surface 62a and is internally reflected (totally reflected) by the reflection surface 62a3 for the wide light distribution pattern. The surface shape is configured such that light from the light source 14 emitted from the light distribution pattern emission surface 62a1 is collimated in the vertical direction and diffused in the horizontal direction. Otherwise, the configuration is the same as the lens body 62 of the thirteenth embodiment.

  The lens body 62A of the present modification can also achieve the same effect as that of the thirteenth embodiment.

  Next, a lens body 62B that is a modification of the lens body 62 will be described.

  FIG. 87 is a longitudinal sectional view of the rear end 62a of the lens body 62B.

  In the lens body 62B of this modification, the first incident surface 62a1 is omitted. That is, the incident surface A for the wide light distribution pattern is configured only by the second incident surface 62a. Otherwise, the configuration is the same as the lens body 62 of the thirteenth embodiment.

  The lens body 62B of the present modification can also achieve the same effect as that of the thirteenth embodiment.

  Each numerical value shown in the above embodiment and each modified example is an exemplification, and any appropriate numerical value different from this can be used.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

  DESCRIPTION OF SYMBOLS 10, 10A-10N ... Vehicle lamp, 12, 12A, 12J, 12N ... Lens body, 12A1 ... 1st lens part, 12A1a ... 1st emission surface, 12A1aa ... 1st rear end part, 12A1bb ... 1st front end part, 12A2 ... 2nd lens part, 12A2a ... 2nd entrance surface, 12A2aa ... 2nd rear end part, 12A2b ... 2nd exit surface, 12A3 ... Connection part, 12a ... 1st entrance surface, 12b ... Reflective surface (lower reflective surface) , 12c ... shade, 12d ... exit surface, 14 ... light source, 16, 16C ... lens combination, 18 ... holding member, 42a, 42b ... pair of left and right entrance surfaces, 42c ... top entrance surface, 44a, 44b ... pair of left and right Side surface, 44c ... Upper surface, 44c1 ... Reflective surface for overhead sign, 44c2 ... Left upper surface, 44c3 ... Right upper surface, 46a, 46b ... A pair of left and right emission surfaces

Claims (8)

A lens body disposed in front of a light source, including a rear end portion and a front end portion, and light from the light source incident on the inside of the lens body is emitted from the front end portion and irradiated forward. In a lens body configured to form a high beam light distribution pattern in which a light collection pattern and a diffusion pattern are superimposed,
The rear end includes a diffusion pattern incidence surface, a diffusion pattern reflection surface that internally reflects light from the light source that has entered the lens body from the diffusion pattern incidence surface, and a condensing pattern incidence. And a reflecting surface for the condensing pattern that internally reflects light from the light source that has entered the lens body from the incident surface for the condensing pattern,
The front end includes an exit surface for a diffusion pattern and an exit surface for a condensing pattern,
The entrance surface for the diffusion pattern, the reflection surface for the diffusion pattern, and the exit surface for the diffusion pattern are the light from the light source that has entered the lens body from the entrance surface for the diffusion pattern, A first optical system that emits from the exit surface for the diffusion pattern and is irradiated forward to form the diffusion pattern;
The incident surface for the condensing pattern, the reflecting surface for the condensing pattern, and the exit surface for the condensing pattern are incident on the inside of the lens body from the incident surface for the condensing pattern. The light from the light source internally reflected by the pattern reflecting surface is emitted from the exit surface for the condensing pattern, and is irradiated forward to form the second optical system that forms the condensing pattern. ,
A distance between the light source and the reflecting surface for the condensing pattern is set longer than a distance between the light source and the reflecting surface for the diffusion pattern. The diffusion pattern entrance surface extends rearward from the first entrance surface and an outer peripheral edge of the first entrance surface, and the light source in the space between the light source and the first entrance surface. Including a cylindrical second incident surface surrounding a range other than the notch through which light from
The reflection surface for the diffusion pattern is a reflection surface that is disposed outside the second incident surface and reflects light from the light source incident on the lens body from the second incident surface.
The incident surface for the condensing pattern is an incident surface on which light from the light source that has passed through the notch is incident,
The reflecting surface for the condensing pattern is disposed outside the incident surface for the condensing pattern, and is a reflection that internally reflects light from the light source that has entered the lens body from the incident surface for the condensing pattern. The lens body according to claim 1, wherein the lens body is a surface. The exit surface for the diffusion pattern is configured as a semi-cylindrical surface with a cylindrical axis extending in the horizontal direction, or a semi-cylindrical surface provided with a slant angle and / or a camber angle,
In the first incident surface, the light from the light source that has entered the lens body from the first incident surface is condensed in the vicinity of the focal line of the exit surface for the diffusion pattern in the vertical direction, and is horizontal. In terms of direction, its surface shape is configured to diffuse,
The diffusion surface for the diffusion pattern is such that light from the light source incident on the inside of the lens body from the second incident surface and internally reflected by the reflection surface for the diffusion pattern relates to the vertical direction. The lens body according to claim 2, wherein the surface shape is configured so that the light is condensed near the focal line of the emission surface and diffused in the horizontal direction. The exit surface for the diffusion pattern is configured as a planar surface,
The first incident surface is collimated with respect to the vertical direction, and the light from the light source that is incident on the inside of the lens body from the first incident surface and is emitted from the exit surface for the diffusion pattern is related to the horizontal direction. The surface shape is configured to diffuse,
The diffusion pattern reflecting surface is incident on the inside of the lens body from the second incident surface, is internally reflected by the diffusion pattern reflecting surface, and is emitted from the light source emitted from the diffusion pattern emitting surface. The lens body according to claim 2, wherein the surface shape is configured so as to be collimated in the vertical direction and diffuse in the horizontal direction. The exit surface for the condensing pattern is configured as a planar surface,
The condensing pattern reflecting surface is incident on the inside of the lens body from the condensing pattern incident surface, is internally reflected by the condensing pattern reflecting surface, and exits from the condensing pattern exit surface. The lens body according to any one of claims 2 to 4, wherein a surface shape of the light source is configured so that light from the light source is collimated with respect to a vertical direction and a horizontal direction. The exit surface for the condensing pattern is configured as a planar surface continuous to the lower end edge of the exit surface for the diffusion pattern,
The condensing pattern reflecting surface is incident on the inside of the lens body from the condensing pattern incident surface, is internally reflected by the condensing pattern reflecting surface, and exits from the condensing pattern exit surface. The lens body according to any one of claims 2 to 4, wherein a surface shape of the light source is configured so that light from the light source is collimated with respect to a vertical direction and a horizontal direction.   The lens body according to claim 2, wherein the incident surface for the condensing pattern is configured as a spherical surface with the light source as a center. A vehicle lamp comprising the lens body according to any one of claims 1 to 7 and the light source.