JP5190699B2 - 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 vehicular lamp lens body used as a vehicular signal lamp such as a tail lamp and a stop lamp, and a vehicular lamp using the lens body.

  Patent Document 1 discloses a vehicular lamp provided with a condensing lens on the outer lens side and an inner lens on the light source side that has been subjected to diffusion cut with a pitch smaller than the condensing lens pitch. According to this vehicular lamp, the light from the LED light emitting elements can be diffused in the horizontal and vertical directions, so that a remarkable dark zone is generated when the substrate is arranged in a polygonal line, and each LED light emitting element Can be prevented from being individually viewed from the outer lens surface.

  Patent Document 2 discloses a vehicular lamp having an inner lens in which pyramid-shaped lens cuts are closely arranged vertically and horizontally on the light source side of the lens. According to this vehicular lamp, the light beam that detours due to refraction and increases the distance that reaches the eyes of the viewer is deepened in accordance with the distance from the light beam generated at the position where the LED light emitting element is disposed. Therefore, it is possible to give a viewer a stereoscopic effect as if a plurality of light source substrates are provided or a curved light source substrate is provided.

Further, in Patent Document 3, a flat mirror surface is formed on the inner surface facing the lens of the housing, the light source is a column-shaped light source that is close to and parallel to two sides facing the housing, and the lens has a column-shaped light source. A vehicular lamp is disclosed in which a linear polyhedral prism cut having a prism surface orthogonal to the provided direction is used, and direct light and reflected light from the reflective surface are controlled by the prism cut to make the light emitting surface uniform. . According to this vehicular lamp, the light from the upper light source appears to be stretched forward from the lens surface side, that is, the viewing side, and the light from the lower light source is bent backward from the viewing side. Therefore, it is possible to give the viewer a space that has a depth equivalent to the vertical width of the lens.
Japanese Utility Model Publication No. 3-112817 Japanese Utility Model Publication No. 5-50611 Japanese Utility Model Publication No. 6-56910

  By the way, the vehicular lamp of Patent Document 1 is provided with a condensing lens on the outer lens side of the inner lens and a diffusion cut on the light source side of the inner lens, so that a dark zone is generated and the LED light emitting element is separated from the outer lens surface. Since it eliminates being viewed individually, it did not give the viewer a sense of depth or stereoscopic effect due to the illusion effect.

  Moreover, the vehicular lamp of Patent Document 2 has a plurality of light source substrates or a curved light source substrate by arranging a pyramid-shaped lens cut closely in the vertical and horizontal directions on the light source side of the inner lens. Since it gives the viewer a stereoscopic effect as if it were provided, this also did not give the viewer a sense of depth or stereoscopic effect due to the illusion effect.

  On the other hand, there is a prism cut as a lens cut for diffusing light from a light source, like the vehicular lamp of Patent Document 3. In recent years, this prism cut has been used as a basic lens cut. Since these prism cuts are mainly used for the purpose of uniformly diffusing light from a light source, the vehicular lamp of Patent Document 3 also has a depth. It did not give viewers a sense of sensation and stereoscopic effect.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lens body and a vehicular lamp that can be lit and displayed to give a sense of depth and stereoscopic effect by an illusion effect.

  In order to achieve the above object, the present invention has a lens surface formed in an oblique column shape or a pyramid shape, and has an inclined surface corresponding to a side surface of the oblique column or the pyramid, and one of the inclined surfaces. A lens body in which a substantially lattice-shaped pattern line is formed on the surface of the lens and a plurality of lens cuts are formed on the other surface with the pattern line as a boundary line. Provided is a lens body characterized in that the lens cut and the area of the pattern line and the radius of curvature of the lens cut become smaller from the skirt portion to the top portion of the inclined surface of the body.

  By the way, in order to diffuse light at a wide angle by a lens cut with a large area, the radius of curvature of the lens cut must be set small, but this increases the thickness of the lens and increases the area of the lens cut. However, there is a problem that the lens becomes thick.

  Therefore, in order to eliminate such a problem, in the present invention, the lens cut is performed so that the area of the lens cut and the radius of curvature of the lens cut gradually decrease from the bottom to the top of the inclined surface of the lens body. Form. As a result, since the lens cut has a large curvature radius in the region where the lens cut area is large, the lens body can be configured without increasing the thickness of the lens, and in the region where the lens cut area is small, the lens cut has a small curvature radius. Therefore, the lens body can be configured without increasing the thickness of the lens. According to this lens body, light can be diffused to a wide angle by the lens cut having a small radius of curvature arranged in the region having a small lens cut area.

  Here, the lens body is arranged so that the top thereof faces the viewer. As a result, the light diffuses as it approaches the top that can be seen on the back side due to the illusion effect (actually the top on the near side). Illumination display that gives a sense of depth and stereoscopic effect can be achieved. In addition, due to this effect, for example, if the vehicular lamp using the lens body is a tail lamp, the light that is diffused from the top to a wide angle increases the lighting display angle that can be seen from the rear of the vehicle. be able to.

  Furthermore, according to the lens body of the present invention, a substantially lattice pattern line is formed on the surface of the lens body opposite to the surface on which the lens cut is formed by a boundary line between adjacent lens cuts. ing. In this grid pattern line, both vertical and horizontal pattern lines are gradually narrowed toward the top that can be seen on the back side due to the illusion effect, so the pattern lines are illuminated from the back side (lens cut surface) of the pattern lines. Then, the pattern line is viewed in a three-dimensionally raised pyramid shape. Thereby, according to this lens body, the lighting display with a feeling of depth and a three-dimensional effect is attained.

  In order to achieve the above object, the present invention is a vehicular lamp that includes the lens body of the present invention and a light source, and emits light from the light source through the lens body. Is provided on the opposite side to the light source. Thereby, according to this vehicle lamp, the lighting display which gives a sense of depth with a high-class feeling and a three-dimensional effect is enabled by the illusion effect.

  Moreover, according to the vehicular lamp of the present invention, it is preferable that the vehicular lamp includes a reflector that makes the light from the light source enter parallel light and enter the lens body. When parallel light is incident on the lens body, the light diffusion angle gradually widens from the skirt to the top of the inclined surface of the lens body, and as described above, a lighting display effect that becomes darker toward the top can be obtained. It is possible to give a viewer a sense of depth and stereoscopic effect.

  As described above, according to the present invention, it is possible to provide a lens body and a vehicular lamp that can be turned on to give a sense of depth and a three-dimensional effect due to an illusion effect.

  Hereinafter, preferred embodiments of a lens body and a vehicle lamp according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a first lens body 10 having a longitudinal section formed in a triangular shape and a lens surface formed in a pyramid shape (in the figure, a quadrangular pyramid), and FIG. 2 shows a lens whose section is formed in a trapezoidal shape. A second lens body 20 whose surface is formed in an oblique columnar shape (square column in the figure) is shown. FIG. 3 shows that the two first lens bodies 10 and 10 are connected so that the longitudinal sides of the two first lens bodies 10 and 10 coincide with each other in the center, and each of the other one side in the longitudinal direction of the first lens body 10 and the second lens body. A long third lens body 30 connected so that one side of 20 coincides is shown. 3 (A) is a front view of the third lens body 30, FIG. 3 (B) is a side view of FIG. 3 (A), and FIG. 4 is a longitudinal section along the line AA of FIG. 3 (A). FIG. 5 is a cross-sectional view taken along line BB in FIG. 3A, and FIG. 6 is a cross-sectional view taken along line CC in FIG.

  On the inner inclined surface of the third lens body 30, that is, the inner inclined surfaces of the first lens body 10 and the second lens body 20, a large number of lens cuts 32, 32,. It is arranged and formed. These lens cuts 32, 32... Are formed such that the area of the lens cut and the radius of curvature of the lens cut gradually decrease from the skirt to the top of the inner inclined surface of the third lens body 30. .

  By the lens cuts 32, 32..., The substantially inclined pattern lines 34, 34... Are substantially latticed on the outer inclined surface of the third lens body 30 by the boundary line between the adjacent lens cuts 32, 32. It is formed in a shape. These pattern lines 34, 34... Are visually recognized so that the vertical and horizontal pattern lines 34, 36 are gradually narrowed toward the top portion (actually the top portion on the near side) that is visible on the back side due to the illusion effect. The As a result, when the third lens body 30 is viewed with the top facing the viewer, an illusion effect can be given to the viewer so that the unevenness of the third lens body 30 can be seen in reverse. Alternatively, the lens cuts 32, 32... May be formed on the outer inclined surface of the third lens body 30, and the pattern lines 34, 34, etc. may be formed on the inner inclined surface of the third lens body 30. The triangular transparent design surfaces 12 and 12 on the both side surfaces of the first lens body 10 shown in FIG. 1 do not form lens cuts and pattern lines, but are lenses similar to other inclined surfaces. Cuts 32 and pattern lines 34 may be formed. Further, the design surfaces 12 and 12 may be subjected to embossing to prevent direct light from passing through the embossed surfaces. Similarly, a lens cut may be formed on the rectangular transparent design surface 22 located at the top of the second lens body 20 shown in FIG. 2, and direct light is prevented from passing through. For this purpose, a graining process may be applied.

  On the other hand, it is preferable that the first lens body 10 and the second lens body 20 are integrally molded by injection molding using a resin such as acrylic. This makes it possible to easily manufacture the lens cuts 32, 32,..., Where the area of the lens cut and the radius of curvature of the lens cut gradually decrease from the base to the top. A flange 36 for fixing the third lens body 30 to a case such as a housing is formed along the four sides of the third lens body 30 at the bottom of the third lens body 30. .

  According to the lens cuts 32, 32... Of the third lens body 30 configured in this way, the AA cross-sectional optical system in FIG. 3A of the first lens body 10 shown in FIG. 3A of the second lens body 20 shown in FIG. 3A, and a cross-sectional optical system A-A in FIG. 3A of the second lens body 20 shown in FIG. Like the C-section optical system, the lens cuts 32, 32... From the rear of the third lens body 30 have a function of diffusing incident parallel light in a predetermined direction.

  Particularly, since the radius of curvature of the lens cut 32 is set to be smaller in the region divided by the pattern lines 34, 34... (See FIGS. 1 to 3), the above diffusion direction is the center of the lens (the top). ) Is set so that the section close to) spreads over a wider angle. By setting the lens cuts 32, 32... In this way, light is diffused closer to the top visible on the far side due to the illusion effect, so the region visible on the far side looks darker. Therefore, when this third lens body 30 is used for a vehicular lamp, lighting display that gives a sense of depth and a three-dimensional effect due to an illusion effect is possible.

  FIG. 9 shows a main configuration of a vehicular lamp 50 including a third lens body 30 and a reflector 40. In the reflector 40, six small reflectors 42 </ b> A to 42 </ b> F that irradiate light from a light source (not shown) such as an LED light emitting element once in a forward direction as means for irradiating parallel light are arranged in a horizontal row. Yes.

  Further, according to the vehicular lamp 50, the top portion of the third lens body 30 is disposed on the opposite side with respect to the reflector 40. Further, in this vehicular lamp 50, the parallel light from the small reflectors 42A and 42B is incident on the second lens body 20A located on the left side of FIG. 9, and the parallel light from the small reflector 42C is converted to the left side of FIG. The parallel light from the small reflector 42D is incident on the first lens body 10B located on the right side of FIG. 9, and the parallel light from the small reflectors 42E and 42F is It is configured to be incident on the second lens body 20B located on the right side of FIG.

  According to the vehicular lamp 50 configured as described above, when the parallel light from the reflector 40 enters the third lens body 30, the light is transmitted from the bottom of the inclined surface of the third lens body 30 toward the top. Since the diffusion angle is gradually widened, it is possible to obtain a lighting display effect that becomes darker toward the top, thereby enabling lighting display that gives a sense of depth and stereoscopic effect. In addition, due to this effect, for example, when the vehicular lamp 50 is a tail lamp, it is possible to obtain an effect that a lighting display angle that can be viewed from the rear of the vehicle is widened by light diffused from the top to a wide angle.

  Further, the third lens body 30 is formed with a substantially lattice pattern line by a boundary line between adjacent lens cuts 32, 32..., And this pattern line includes both vertical and horizontal pattern lines. Because the distance gradually narrows toward the top that can be seen on the back side due to the effect, when the pattern line is illuminated from the back side (lens cut surface) of the pattern line, the pattern line is viewed as a three-dimensionally raised pyramid. The Thereby, according to the vehicular lamp 50 using the third lens body 30, it is possible to perform lighting display with a sense of depth and a stereoscopic effect.

  By the way, in order to diffuse light at a wide angle by a lens cut with a large area, the radius of curvature of the lens cut must be set small. However, in this case, there is a problem that the thickness of the lens is increased and the thickness of the lens is increased even when the area of the lens cut is increased.

  Therefore, in order to solve such a problem, as in the embodiment, the area of the lens cut and the radius of curvature of the lens cut become smaller from the bottom to the top of the inclined surface of the third lens body 30. Are formed with lens cuts 32, 32. As a result, the region having a large lens cut area has the lens cut 32 having a large radius of curvature, so that the third lens body 30 can be configured without increasing the thickness of the lens, and the region having a small lens cut area has a curvature. Since the lens cut 32 having a small radius is provided, a lens body that diffuses light can be configured without increasing the thickness of the third lens body 30.

  In addition, this invention replaces with the lens bodies 10, 20, and 30 of Examples 1-3 shown in FIGS. 1-9, and is like Examples 4-9 shown in the following FIGS. Even with the lens bodies 60, 70, 80, 90, 100, 110, the effects of the present invention can be realized.

Example 4
A fourth lens body 60 shown in FIG. 10 is a modification of the first lens body 10 shown in FIG. In the fourth lens body 60, lens cuts 32A, 32A... Of the same size are formed along the ridge line (design surface) at the top. That is, the fourth lens body 60 is different in configuration from the first lens body 10 shown in FIG. 5 in that the lens cuts 32A, 32A,... The fourth lens body 60 has a function of diffusing parallel light from the rear of the lens body 60 in an arbitrary direction.

Example 5
A fifth lens body 70 shown in FIG. 11 is a modification of the second lens body 20 shown in FIG. In the fifth lens body 70, lens cuts 32B, 32B... Are formed on the outer inclined surface. That is, the fifth lens body 70 is different in configuration from the second lens body 20 shown in FIG. 6 in that the lens cuts 32B, 32B,... The fifth lens body 70 has a function of diffusing parallel light from the rear of the lens body 70 in an arbitrary direction.

Example 6
A sixth lens body 80 shown in FIG. 12 is a modification of the first lens body 10 shown in FIG. In the sixth lens body 60, a lens cut 32 </ b> C having a large curvature radius that diffuses parallel light is formed on the back surface of the triangular design surface 12. That is, the sixth lens body 80 is different from the first lens body 10 shown in FIG. 5 in that the lens cuts 32C, 32C,... This lens cut 32C can prevent direct light from passing through.

Example 7
A seventh lens body 90 shown in FIG. 13 is a modification of the second lens body 20 shown in FIG. In the seventh lens body 90, a lens cut 32 </ b> D having a large curvature that diffuses parallel light is formed on the back surface of the design surface 22. That is, the seventh lens body 90 is different in configuration from the second lens body 20 shown in FIG. 6 in that the lens cut 32D is applied to the back surface of the design surface 22. This lens cut 32D can prevent direct light from passing through.

Example 8
The eighth lens body 100 shown in FIG. 14 shows a modification of the first lens body 60 shown in FIG. In the eighth lens body 100, a lens cut 32E having a large curvature radius for diffusing parallel light on the triangular design surface 12 is formed. This lens cut 32E can prevent direct light from passing through.

Example 9
A ninth lens body 110 shown in FIG. 15 is a modification of the second lens body 60 shown in FIG. In the ninth lens body 110, a lens cut 32 </ b> F having a large curvature radius that diffuses parallel light is formed on the design surface 22. This lens cut 32F prevents direct light from passing through.

  The above-described 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.

Front view of first lens body having a longitudinal section formed in a triangular shape Front view of the second lens body having a trapezoidal cross section (A) is a front view of the third lens body 30, and (B) is a side view of (A). Longitudinal sectional view along line AA in FIG. Cross-sectional view along line BB in FIG. Cross-sectional view along line CC in FIG. Explanatory drawing which showed the AA cross-section optical system in FIG. 3 (A) of a 1st lens body. (A) is explanatory drawing which showed the AA cross-section optical system in FIG. 3 (A) of a 2nd lens body, (B) is CC cross section in FIG. 3 (A) of a 2nd lens body. Explanatory drawing showing the optical system The perspective view which showed the principal part structure of the vehicle lamp provided with the 3rd lens body and the reflector. Cross-sectional configuration diagram of the fourth lens body Cross-sectional configuration diagram of the fifth lens body Cross-sectional configuration diagram of the sixth lens body Cross-sectional configuration diagram of the seventh lens body Cross-sectional configuration diagram of the eighth lens body Cross-sectional configuration diagram of the ninth lens body

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... 1st lens body, 12 ... Design surface, 20 ... 2nd lens body, 22 ... Design surface, 30 ... 3rd lens body, 32, 32A, 32B, 32C, 32D, 32E, 32F ... Pattern line , 36 ... flange, 40 ... reflector, 42A to 40F ... small reflector, 50 ... vehicle lamp, 60 ... fourth lens body, 70 ... fifth lens body, 80 ... sixth lens body, 90 ... seventh Lens body, 100 ... eighth lens body, 110 ... ninth lens body

Claims (3)

The lens surface is formed in an oblique column shape or a pyramid shape, and has an inclined surface corresponding to the side surface of the inclined column shape or the pyramid shape, and a substantially grid pattern line is formed on one surface of the inclined surface. The other surface is a lens body in which a plurality of lens cuts are formed with the pattern line as a boundary line,
The plurality of lens cuts and pattern lines are formed so that the area of the lens cuts and pattern lines and the radius of curvature of the lens cuts become smaller from the bottom to the top of the inclined surface of the lens body. Characteristic lens body. A vehicle lamp comprising the lens body according to claim 1 and a light source, wherein the light from the light source is emitted through the lens body,
A vehicular lamp, wherein a top portion of the lens body is disposed on an opposite side to the light source.   The vehicular lamp according to claim 2, further comprising a reflector that makes the light from the light source enter parallel light into the lens body.

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