JP5338742B2 - Vehicle headlamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular headlight capable of surely attaining a light-distributing pattern LP for a low beam. <P>SOLUTION: In the vehicular headlight, surface treatment sections 170 for making light L6U, L6D incident to the end faces of translucent holes 17 among light emitted from the light-emitting chip 4 reflect except reflecting surfaces 2U, 2D of a fixed reflector 3 are arranged on end faces opposite to a light-emitting chip 4, namely, end faces of translucent holes 17, when at least movable reflectors 13U, 13D among the end faces excluding reflecting surfaces 12U, 12D of the movable reflectors 13U, 13D are located at a first position. Thus, the vehicular headlight can surely obtain the light-distributing pattern LP for a low beam. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a low beam light distribution pattern (passing light distribution pattern) and at least a high beam light distribution pattern (running light distribution pattern), that is, a high beam light distribution pattern (running light distribution pattern) and a daytime running light. The present invention relates to a vehicle headlamp that switches between a light distribution pattern and irradiates the front of the vehicle.

  This type of vehicle headlamp has been conventionally used (for example, Patent Document 1). Hereinafter, a conventional vehicle headlamp will be described. A conventional vehicular headlamp includes a first light source unit that forms a low beam light distribution pattern and a second light source unit that forms a high beam light distribution pattern. The first light source unit is a projector type lamp unit, and includes a light source, an elliptical (convergent) reflector, a shade, and a projection lens. The second light source unit is a projector-type lamp unit, and includes a light source, an elliptical (convergent) reflector, and a projection lens. Hereinafter, the operation of the conventional vehicle headlamp will be described. When the light source of the first light source unit is turned on, the light from the light source is reflected by the reflector, a part of the reflected light is cut off by the shade, and the light distribution pattern having the oblique cutoff line and the horizontal cut line, that is, the light distribution for the low beam A pattern is formed, and the low-beam light distribution pattern is turned upside down from the projection lens and irradiated (projected) in front of the vehicle. When the light source of the second light source unit is turned on, the light from the light source is reflected by the reflector, and the reflected light is inverted (up / down / left / right) from the projection lens as a high beam light distribution pattern and irradiated (projected) in front of the vehicle.

  However, a conventional vehicle headlamp is composed of a first light source unit including a light source, a reflector, a shade, and a projection lens, and a second light source unit including a light source, a reflector, and a projection lens. is there. For this reason, the conventional vehicle headlamp has a large number of parts and requires a second light source unit for a high-beam light distribution pattern, and accordingly, downsizing, weight reduction, power saving, and cost reduction. There is a problem in conversion.

  Therefore, in this application, a vehicle headlamp (Japanese Patent Application No. 2008-280070, Japanese Patent Application No. 2009-019848) that can be reduced in size, weight, power saving, and cost reduction was filed first.

JP 2007-109493 A

  The problem to be solved by the present invention is that a low beam light distribution pattern (passing light distribution pattern) in a vehicle headlamp of an earlier application that can be reduced in size, weight, power saving, and cost reduction. ) Is definitely obtained.

  According to the present invention (the invention according to claim 1), a fixed reflector having a reflective surface, a movable reflector having a reflective surface, a semiconductor light source having a light emitting chip, and a horizontal reflector that passes through the movable reflector through the center of the light emitting chip or its vicinity. A holder that is rotatably mounted about an axis, and a drive device that rotates the movable reflector between a first position and at least a second position about a horizontal axis, and the reflecting surface of the fixed reflector has a low beam light distribution It is composed of a low-beam reflective surface that forms a pattern and at least a high-beam reflective surface that forms a high-beam light distribution pattern, and the reflective surface of the movable reflector is composed of at least a high-beam reflective surface that forms a high-beam light distribution pattern When the movable reflector is located at the first position, the fixed reflector is attached to the light emitting chip. The light radiated to at least the high beam reflecting surface of the reflector or the reflected light reflected from at least the high beam reflecting surface of the fixed reflector is shielded by the movable reflector, and the reflected light reflected by the low beam reflecting surface of the fixed reflector is When the light beam is irradiated in front of the vehicle as a low beam light distribution pattern and the movable reflector is at least in the second position, the reflected light is reflected by at least the high beam reflecting surface of the movable reflector and is reflected by at least the high beam reflecting surface of the fixed reflector. The reflected light reflected by the low-beam reflecting surface of the fixed reflector is irradiated at least in front of the vehicle as at least a high-beam light distribution pattern, and at least of the end surfaces other than the reflecting surface of the movable reflector, at least the movable reflector Is in the first position Occasionally, the end face of the light emitting chip facing, surface treatment for reflecting the light emitted from the light emitting chip in addition to the reflecting surface of the fixed reflector is provided, characterized in that.

  In the invention (the invention according to claim 2), the surface treatment unit is a surface treatment unit that reflects light emitted from the light emitting chip to the light emitting chip side.

  Further, according to the present invention (the invention according to claim 3), the fixed reflector is provided with a window portion in which the holder is located, and the surface treatment portion reflects the light emitted from the light emitting chip to the window portion. It is a part.

  According to the vehicle headlamp of the present invention (the invention according to claim 1), the light emitting chip of the semiconductor-type light source is turned on and emitted when the movable reflector is located at the first position by the means for solving the above-mentioned problems. If it does, the light radiated | emitted from a light emitting chip will be reflected by the reflective surface for low beams of a fixed reflector, and the reflected light will be irradiated ahead of a vehicle as a low beam light distribution pattern. Further, when the light emitting chip of the semiconductor light source is turned on and emits light when the movable reflector is at least in the second position, the light emitted from the light emitting chip is at least for the high beam reflecting surface of the movable reflector and for at least the high beam of the fixed reflector. Reflected by the reflecting surface and the low beam reflecting surface, the reflected light is irradiated at least in front of the vehicle as at least a high beam light distribution pattern.

  In addition, the vehicle headlamp of the present invention (the invention according to claim 1) is composed of a fixed reflector, a movable reflector, a semiconductor light source, and a driving device. Therefore, compared to a conventional vehicle headlamp, At least the second light source unit for the high-beam light distribution pattern is not required, and the number of components can be reduced. Accordingly, the size, weight, power saving, and cost reduction can be achieved.

  In particular, the vehicle headlamp of the present invention (the invention according to claim 1) radiates from the light emitting chip when the movable reflector is positioned at the first position by the surface treatment portion provided on the end surface of the movable reflector. Even if the light to be incident on the end face of the movable reflector facing the light emitting chip, the light can be reflected to a portion other than the reflecting surface of the fixed reflector. As a result, the vehicle headlamp according to the present invention (the invention according to claim 1) has the movable reflector positioned at the first position, that is, when the low-beam light distribution pattern is irradiated in front of the vehicle. Since the light reflected by the end face of the movable reflector is incident on the reflecting surface of the fixed reflector and is not irradiated to the front of the vehicle as uncontrolled reflected light other than the low beam light distribution pattern, the low beam light distribution pattern Can be definitely obtained.

  The vehicle headlamp according to the present invention (the invention according to claim 2) is a light emitted from the light emitting chip when the movable reflector is located at the first position by means for solving the above-mentioned problems. Thus, the light incident on the surface treatment portion on the end face of the movable reflector can be reflected to the light emitting chip side. As a result, in the vehicle headlamp of the present invention (the invention according to claim 2), the light reflected from the end surface of the movable reflector when the low beam light distribution pattern is irradiated in front of the vehicle is on the light emitting chip side. Therefore, the light distribution pattern for low beam can be obtained more reliably.

  Further, the vehicle headlamp of the present invention (the invention according to claim 3) is a light emitted from the light emitting chip when the movable reflector is located at the first position by means for solving the above-mentioned problems. Thus, the light incident on the surface treatment portion on the end face of the movable reflector can be reflected on the window portion of the fixed reflector. As a result, in the vehicle headlamp of the present invention (the invention according to claim 3), the light reflected from the end surface of the movable reflector is reflected by the fixed reflector when the low beam light distribution pattern is irradiated in front of the vehicle. Since the light is reflected by the window, a low beam light distribution pattern can be obtained more reliably.

FIG. 1 shows a first embodiment of a vehicle headlamp according to the present invention, and is an explanatory view of an optical path when a surface treatment is applied to an end face of a through hole of a movable reflector. FIG. 2 is a perspective view of the main part when the upper movable reflector and the lower movable reflector are located at the first position. FIG. 3 is a perspective view showing the main part when the upper movable reflector and the lower movable reflector are located at the second position, similarly. FIG. 4 is a front view showing the main part when the upper movable reflector and the lower movable reflector are located at the first position, similarly. FIG. 5 is a front view showing the main part when the upper movable reflector and the lower movable reflector are located at the second position, similarly. FIG. 6 is a sectional view taken along the line VI-VI in FIG. FIG. 7 is also a cross-sectional view taken along the line VII-VII in FIG. 5 showing the optical path. FIG. 8 is also a cross-sectional view taken along the line VI-VI in FIG. 4 showing the energy distribution of the semiconductor light source. FIG. 9 is also a cross-sectional view taken along the line VII-VII in FIG. 5 showing the energy distribution of the semiconductor light source. FIG. 10 is a perspective view showing the main part from which the upper movable reflector, the lower movable reflector, and the driving device are omitted. FIG. 11 is also a front view showing a main part in which the upper movable reflector, the lower movable reflector, and the driving device are omitted. 12 is also a cross-sectional view taken along line XII-XII in FIG. FIG. 13 is an explanatory perspective view showing the relative positional relationship between the center of the light emitting chip and the reference focal point of the reflecting surface. FIG. 14 is also an explanatory plan view showing the relative positional relationship between the center of the light emitting chip and the reference focal point of the reflecting surface. FIG. 15 is also an explanatory front view showing a range in which a first reflecting surface composed of a fourth segment and a second reflecting surface composed of a fifth segment are provided. FIG. 16 is also an explanatory view showing a reflected image of the light emitting chip obtained at the point P1 on the reflecting surface. FIG. 17 is also an explanatory diagram showing a reflected image of the light emitting chip obtained at points P2 and P3 on the reflecting surface. FIG. 18 is also an explanatory view showing a reflected image of the light emitting chip obtained at points P4 and P5 on the reflecting surface. FIG. 19 is also an explanatory diagram showing a reflected image group of the light emitting chip obtained on the first reflecting surface composed of the fourth segment. FIG. 20 is also an explanatory view showing a reflected image group of the light emitting chip obtained on the second reflecting surface composed of the fifth segment. FIG. 21 is an explanatory diagram showing a low beam light distribution pattern having an oblique cutoff line and a horizontal cutoff line. FIG. 22 is also an explanatory diagram showing a high beam light distribution pattern. FIG. 23 is an explanatory diagram of an optical path when the end surface of the through hole of the movable reflector is not subjected to surface treatment. FIG. 24 is an explanatory view showing a daylight running light distribution pattern according to a second embodiment of the vehicle headlamp according to the present invention.

  Embodiments of a vehicle headlamp according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In the drawing, reference sign “VU-VD” indicates vertical lines on the upper and lower sides of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen. FIG. 19 and FIG. 20 are explanatory diagrams showing reflected image groups of the light emitting chips on the screen obtained by computer simulation. In this specification and claims, “up, down, front, back, left, right” means “the vehicle headlight when the vehicle headlamp according to the present invention is attached to the vehicle (automobile)”. Top, bottom, front, back, left, right ". In FIG. 10, FIG. 11, and FIG. 12, the upper movable reflector 13U, the lower movable reflector 13D, and the drive device 14 are not shown in order to clarify the configuration of the invention. Further, in FIGS. 2, 3, 4, and 5, illustration of the fin shape of the heat sink member 7 is omitted.

(Description of configuration)
1 to 22 show Embodiment 1 of a vehicle headlamp according to the present invention. Hereinafter, the configuration of the vehicle headlamp in the first embodiment will be described. In the figure, reference numeral 1 denotes a vehicle headlamp (automobile headlamp) in the first embodiment. The vehicle headlamp 1 has a light distribution pattern for passing (low beam light distribution pattern) shown in FIG. 21, that is, an oblique cut-off line CL1 on the traveling lane side (left side) at the elbow point E, In addition, a low beam light distribution pattern LP having a horizontal cut line CL2 on the opposite lane side (right side) and a traveling light distribution pattern (high beam light distribution pattern) shown in FIG. 22, that is, a first high beam light distribution pattern HP1. The second high beam light distribution pattern HP2, the third high beam light distribution pattern HP3, and the dimming low beam light distribution pattern LP1 are switched to irradiate the front of the vehicle. The angle formed between the oblique cut-off line CL1 and the horizontal line HL-HR of the screen is about 15 °.

  The vehicle headlamp 1 includes a fixed reflector 3 having an upper reflective surface 2U and a lower reflective surface 2D made of a parabolic free curved surface (NURBS curved surface), and an upper side made of a parabolic free curved surface (NURBS curved surface). An upper semiconductor light source 5U and a lower semiconductor light source 5D each having an upper movable reflector 13U having a reflective surface 12U and a lower movable reflector 13D having a lower reflective surface 12D, and a light emitting chip 4 having a planar rectangular shape (planar rectangular shape). And a holder 6, a heat sink member 7, a driving device 14, and a lamp housing and a lamp lens (for example, a transparent outer lens) (not shown).

  The holder 6 has a plate shape having an upper fixing surface and a lower fixing surface. The holder 6 is made of, for example, a resin member or a metal member having a high thermal conductivity. The heat sink member 7 has a trapezoidal shape having an upper fixing surface in the upper part, and has a fin shape from the middle part to the lower part. The heat sink member 7 is made of, for example, a resin member or a metal member having a high thermal conductivity.

  The fixed reflector 3, the upper movable reflector 13U, the lower movable reflector 13D, the upper semiconductor light source 5U, the lower semiconductor light source 5D, the holder 6, the heat sink member 7, and the driving device 14 are a lamp unit. Configure. That is, the fixed reflector 3 is fixedly held by the holder 6. The upper movable reflector 13U and the lower movable reflector 13D are attached to the holder 6 so as to be rotatable about a horizontal axis X. The upper semiconductor light source 5U is fixedly held on the upper fixing surface of the holder 6. The lower semiconductor light source 5D is fixedly held on the lower fixing surface of the holder 6. The holder 6 is fixedly held on the upper fixing surface of the heat sink member 7. The driving device 14 is fixedly held on the upper fixing surfaces of the holder 6 and the heat sink member 7.

  The lamp units 3, 5U, 5D, 6, 7, 13U, 13D, and 14 are disposed, for example, via an optical axis adjusting mechanism in a lamp chamber defined by the lamp housing and the lamp lens. In addition to the lamp units 3, 5U, 5D, 6, 7, 13U, 13D, and 14, other lamp units such as fog lamps, cornering lamps, clearance lamps, and turn signal lamps are disposed in the lamp chamber. There may be.

  The upper reflecting surface 2U of the fixed reflector 3, the upper reflecting surface 12U of the upper movable reflector 13U, and the upper semiconductor light source 5U are formed of an upper unit whose light emitting surface of the light emitting chip 4 is upward in the vertical axis Y direction. Configure. The lower reflective surface 2D of the fixed reflector 3, the lower reflective surface 12D of the lower movable reflector 13D, and the lower semiconductor-type light source 5D are configured such that the light emitting surface of the light emitting chip 4 is in the vertical axis Y direction. Configures the downward-facing unit. As shown in FIG. 11, the upper units 2U, 5U, 12U, and 13U and the lower units 2D, 5D, 12D, and 13D are in a point-symmetric state with respect to the point O as shown in FIG. Has been placed. The reflective surface design of the upper reflective surfaces 2U and 12U and the reflective surface design of the lower reflective surfaces 2D and 12D are not mere point symmetry (inversion).

  The fixed reflector 3 is made of, for example, a light impermeable resin member. The fixed reflector 3 has a substantially paraboloidal shape with the axis passing through the point symmetry point O as the rotation axis. The front side of the fixed reflector 3 is opened in a substantially circular shape. The size of the opening on the front side of the fixed reflector 3 is about 100 mm or less, preferably about 50 mm or less. On the other hand, the rear side of the fixed reflector 3 is closed. A horizontally elongated substantially rectangular window 8 is provided in the middle of the closed portion of the fixed reflector 3. The holder 6 is inserted and positioned in the window portion 8 of the fixed reflector 3. The fixed reflector 3 is fixedly held by the holder 6 on the outer side (rear side) of the closing portion.

  The upper reflection surface 2U and the lower reflection surface 2D are provided on the upper side and the lower side of the window portion 8 on the inner side (front side) of the closed portion of the fixed reflector 3, respectively. The upper reflecting surface 2U and the lower reflecting surface 2D, which are parabolic free curved surfaces (NURBS curved surfaces), have a reference focal point (pseudo focal point) F and a reference optical axis (pseudo optical axis) Z. Ineffective surfaces 9 are provided between the upper reflective surface 2U and the lower reflective surface 2D and on both the left and right sides of the window portion 8 on the inner side (front side) of the closed portion of the fixed reflector 3. Yes.

  The upper reflective surface 2U and the lower reflective surface 2D of the fixed reflector 3 are a low-beam reflective surface that forms the low-beam light distribution pattern LP and the dimming low-beam light distribution pattern LP1, and the first high-beam reflective surface. The first high beam reflecting surface and the second high beam reflecting surface that form the light distribution pattern HP1 and the second high beam light distribution pattern HP2.

  The driving device 14 includes a motor 15, a driving force transmission mechanism 16, and a movable reflector return spring (not shown). The motor 15 is directly fixed and held on the upper fixing surface of the heat sink member 7. Thereby, the heat generated when the motor 15 is energized can be radiated (heat radiated) to the outside by the heat sink member 7. The driving force transmission mechanism 16 is provided between the motor 15 and the upper movable reflector 13U and the lower movable reflector 13D. The driving device 14 moves the upper movable reflector 13U and the lower movable reflector 13D around the horizontal axis X with respect to the holder 6 at a first position (FIGS. 1, 2, 4, 6, and 6). It is rotated between the position shown in FIG. 8 and the second position (position shown in FIGS. 3, 5, 7, and 9).

  The upper movable reflector 13U and the lower movable reflector 13D are made of, for example, a light-impermeable resin member. The upper movable reflector 13U and the lower movable reflector 13D located at the second position have a substantially paraboloidal shape with the axis passing through the point symmetry point O as the rotation axis. The front sides of the upper movable reflector 13U and the lower movable reflector 13D located at the second position are opened in a substantially circular shape. The size of the opening on the front side of the upper movable reflector 13U and the lower movable reflector 13D, that is, the opening area, is the size of the opening on the front side of the fixed reflector 3 (diameter of about 100 mm or less, preferably about 50 mm). Or less), that is, smaller than the opening area.

  A semicircular through hole 17 is provided in the center of each of the upper movable reflector 13U and the lower movable reflector 13D. In addition, rectangular flanges 18 are integrally provided at intermediate portions of the peripheral portions of the upper movable reflector 13U and the lower movable reflector 13D. The upper reflective surface 12U and the lower reflective surface 12D are respectively provided on the surfaces of the upper movable reflector 13U and the lower movable reflector 13D that face the upper semiconductor light source 5U and the lower semiconductor light source 5D. Is provided. The upper reflecting surface 12U and the lower reflecting surface 12D made of parabolic free-form surfaces (NURBS curved surfaces) have a reference focus (pseudo focus) F1 and a reference optical axis (pseudo optical axis) Z7.

  The upper reflective surface 12U of the upper movable reflector 13U and the lower reflective surface 12D of the lower movable reflector 13D are configured by a third high beam reflective surface that forms the third high beam light distribution pattern HP3. .

  The semiconductor-type light sources 5U and 5D include a substrate 10, the light-emitting chip 4 provided on the substrate 10, and a thin rectangular parallelepiped sealing resin member 11 that seals the light-emitting chip 4. Yes. As shown in FIGS. 13 and 14, the light emitting chip 4 is formed by arranging five square chips in the horizontal axis X direction. A single rectangular chip may be used.

  The center O1 of the light emitting chip 4 is located at or near the reference focal points F, F1 of the reflecting surfaces 2U, 2D, 12U, 12D, and the reference optical axis Z of the reflecting surfaces 2U, 2D, 12U, 12D, Located on Z7. The light emitting surface of the light emitting chip 4 (the surface opposite to the surface facing the substrate 10) is oriented in the vertical axis Y direction. That is, the light emitting surface of the light emitting chip 4 of the upper semiconductor light source 5U faces upward in the vertical axis Y direction. On the other hand, the light emitting surface of the light emitting chip 4 of the lower semiconductor light source 5D faces downward in the vertical axis Y direction. Further, the long side of the light emitting chip 4 is parallel to the horizontal axis X orthogonal to the reference optical axes Z and Z7 and the vertical axis Y. The horizontal axis X is the center O1 of the light emitting chip 4 or its vicinity (between the center O1 of the light emitting chip 4 and the long side on the rear side of the light emitting chip 4, and in this example, the light emitting chip 4 Or the reference focal points F, F1 of the reflecting surfaces 2U, 2D, 12U, 12D or the vicinity thereof.

  The horizontal axis X, the vertical axis Y, and the reference optical axes Z and Z7 constitute an orthogonal coordinate (XYZ orthogonal coordinate system) with the center O1 of the light emitting chip 4 as the origin. In the horizontal axis X, in the case of the upper units 2U, 5U and 12U, the right side is the + direction, the left side is the-direction, and in the case of the lower units 2D, 5D and 12D, the left side is the + direction. And the right side is the-direction. In the vertical axis Y, in the case of the upper units 2U, 5U and 12U, the upper side is the + direction, the lower side is the-direction, and in the case of the lower units 2D, 5D and 12D, the lower side is the + direction. Yes, the upper side is the-direction. In the reference optical axes Z and Z7, the upper units 2U and 5U and the lower units 2D and 5D have a positive direction on the front side and a negative direction on the rear side.

  The reflecting surfaces 2U and 2D of the fixed reflector 3 and the reflecting surfaces 12U and 12D of the movable reflectors 13U and 13D are configured by parabolic free-form surfaces (NURBS curved surfaces). The reference focal points F of the reflecting surfaces 2U and 2D of the fixed reflector 3 and the reference focal points F1 of the reflecting surfaces 12U and 12D of the movable reflectors 13U and 13D coincide or substantially coincide with each other, and the reference optical axes Z and Z7 It is located between the center O1 of the light emitting chip 4 and the long side on the rear side of the light emitting chip 4, and in this example, it is located on the long side on the rear side of the light emitting chip 4. The reference focal lengths of the reflecting surfaces 2U and 2D of the fixed reflector 3 are about 10 to 18 mm, which is larger than the reference focal lengths of the reflecting surfaces 12U and 12D of the movable reflectors 13U and 13D.

  The reference optical axes Z of the reflecting surfaces 2U and 2D of the fixed reflector 3 and the reference optical axes Z7 of the reflecting surfaces 12U and 12D of the movable reflectors 13U and 13D when positioned at the second position coincide with or substantially one. In addition, it is orthogonal to the horizontal axis X and further passes through the center O1 of the light emitting chip 4 or the vicinity thereof. The reference optical axis Z7 of the reflecting surfaces 12U and 12D of the movable reflectors 13U and 13D is the reflecting surfaces 2U and 2D of the fixed reflector 9 from the center O1 of the light emitting chip 4 or the vicinity thereof toward the front. Is upward with respect to the reference optical axis Z.

  When the movable reflectors 13U and 13D are located at the first position, as shown in FIG. 6, the light L1 emitted from the light emitting chip 4 to the first high beam reflecting surface of the fixed reflector 3, and the The reflected light L2 reflected by the second high beam reflecting surface of the fixed reflector 3 is shielded by the movable reflectors 13U and 13D. As a result, the reflected light L3 reflected by the low beam reflecting surface of the fixed reflector 3 is irradiated in front of the vehicle as the low beam light distribution pattern LP (passing light distribution pattern) shown in FIG.

  When the movable reflectors 13U and 13D are located at the second position, as shown in FIG. 7, the reflection reflected by the third high beam reflecting surface (the reflecting surfaces 12U and 12D) of the movable reflectors 13U and 13D. The light L4 is reflected as the third high beam light distribution pattern HP3 shown in FIG. 22, and the reflected lights L5 and L2 reflected by the first high beam reflection surface and the second high beam reflection surface of the fixed reflector 3 are shown in FIG. As the first high beam light distribution pattern HP1 and the second high beam light distribution pattern HP2 shown in FIG. 22, the reflected light L3 reflected by the low beam reflection surface of the fixed reflector 3 is further reduced as shown in FIG. The light distribution pattern LP1 for the light low beam is irradiated to the front of the vehicle. As shown in FIG. 22, the first high beam light distribution pattern HP1, the second high beam light distribution pattern HP2, the third high beam light distribution pattern HP3, and the dimming low beam light distribution pattern LP1 are used. A light distribution pattern (running light distribution pattern) is formed and irradiated to the front of the vehicle.

  When the movable reflectors 13U and 13D are located at the second position, as shown in FIG. 7, a part of the light emitted from the light emitting chip 4 to the low-beam reflecting surface of the fixed reflector 3 is the movable The light is shielded by the reflectors 13U and 13D, and is reflected as reflected light L4 by the third high beam reflecting surfaces (the reflecting surfaces 12U and 12D) of the movable reflectors 13U and 13D. That is, part of the light from the light emitting chip 4 is switched from the dimming low beam light distribution pattern LP1 to the third high beam light distribution pattern HP3. For this reason, the light amount of the dimming low beam light distribution pattern LP1 shown in FIG. 22 is smaller than the light amount of the low beam light distribution pattern LP shown in FIG. On the other hand, when the movable reflectors 13U and 13D are positioned at the first position, the light from the light emitting chip 4 shielded by the movable reflectors 13U and 13D is reflected on the first high beam light distribution pattern HP1 and the first light distribution pattern HP1. It is used as a 2-high beam light distribution pattern HP2. At this time, as shown in FIG. 12, the reflecting surfaces 12U and 12D of the movable reflectors 13U and 13D are located in a high energy range Z3 in the energy distribution Z2 of the light emitting chip 4. As a result, the light quantity of the high beam light distribution pattern (running light distribution pattern) HP1, HP2, HP3, and LP1 shown in FIG. 22 is the same as the low beam light distribution pattern (passing light distribution pattern) shown in FIG. ) It becomes larger than the light quantity of LP.

  The reflective surfaces 2U and 2D are divided into eight parts in the vertical axis Y direction, and the two segments 21, 22, 23, 24, 25, 26 in which the central two parts are divided into two in the horizontal axis X direction, respectively. 27, 28, 29, and 20. The second segment 22, the third segment 23, the fourth segment 24, the fifth segment 25, the sixth segment 26, and the seventh segment 27 in the central portion and the peripheral portion constitute the low beam reflecting surface. The first segment 21 and the eighth segment 28 at both ends constitute the first high beam reflecting surface. Further, the ninth segment 29 and the tenth segment 20 at the center constitute the second high beam reflecting surface.

  In the low beam reflection surface, the fourth segment 24 in the center portion constitutes a first reflection surface. Further, the fifth segment 25 in the center portion constitutes a second reflecting surface. Furthermore, the second segment 22, the third segment 23, the sixth segment 26, and the seventh segment 27 at the end constitute a third reflecting surface.

  The fourth segment 24 of the first reflecting surface at the center and the fifth segment 25 of the second reflecting surface are in a range Z1 between two vertical thick solid lines in FIG. It is provided in a range Z1 where the diagonal lines are given, that is, in a range Z1 within a longitude angle of ± 40 ° (± θ ° in FIG. 14) from the center O1 of the light emitting chip 4. In addition, the second segment 22, the third segment 23, the sixth segment 26, and the seventh segment 27 of the third reflecting surface at the end are the white background range in FIG. 15 other than the range Z1, that is, The light emitting chip 4 is provided in a range of a longitude angle of ± 40 ° or more from the center O1.

  Hereinafter, with respect to the reflection image (screen mapping) of the light emitting chip 4 having a planar rectangular shape obtained in each of the segments 22 to 27 of the reflection surface for low beam among the reflection surfaces 2U and 2D, FIG. 16, FIG. 17, and FIG. The description will be given with reference. That is, at the boundary P1 between the fourth segment 24 and the fifth segment 25, as shown in FIG. 16, the reflected image I1 of the light emitting chip 4 having an inclination of about 0 ° with respect to the horizontal line HL-HR of the screen. Is obtained. Further, at the boundary P2 between the third segment 23 and the fourth segment 24, as shown in FIG. 17, the reflected image I2 of the light emitting chip 4 having an inclination of about 20 ° with respect to the horizontal line HL-HR of the screen. Is obtained. Further, at the boundary P3 between the fifth segment 25 and the sixth segment 26, as shown in FIG. 17, the reflected image I3 of the light emitting chip 4 having an inclination of about 20 ° with respect to the horizontal line HL-HR of the screen. Is obtained. Furthermore, at the boundary P4 between the second segment 22 and the third segment 23, as shown in FIG. 18, the reflected image of the light emitting chip 4 having an inclination of about 40 ° with respect to the horizontal line HL-HR of the screen. I4 is obtained. Furthermore, at the boundary P5 between the sixth segment 26 and the seventh segment 27, as shown in FIG. 18, the reflected image of the light emitting chip 4 having an inclination of about 40 ° with respect to the horizontal line HL-HR of the screen. I5 is obtained.

  As a result, in the fourth segment 24 of the low beam reflecting surface, a reflected image from a reflected image I1 having an inclination of about 0 ° shown in FIG. 16 to a reflected image I2 having an inclination of about 20 ° shown in FIG. It is done. In the fifth segment 25 of the low beam reflecting surface, a reflected image from a reflected image I1 having an inclination of about 0 ° shown in FIG. 16 to a reflected image I3 having an inclination of about 20 ° shown in FIG. 17 is obtained. . Further, in the third segment 23 of the low beam reflecting surface, a reflected image from a reflected image I2 having an inclination of about 20 ° shown in FIG. 17 to a reflected image I4 having an inclination of about 40 ° shown in FIG. 18 is obtained. . Furthermore, in the sixth segment 26 of the low beam reflecting surface, a reflected image from a reflected image I3 having an inclination of about 20 ° shown in FIG. 17 to a reflected image I5 having an inclination of about 40 ° shown in FIG. 18 is obtained. It is done. Furthermore, in the second segment 22 and the seventh segment 27 of the low beam reflecting surface, a reflected image having an inclination of about 40 ° or more is obtained.

  Here, the reflected image from the reflected image I1 having an inclination of about 0 ° shown in FIG. 16 to the reflected images I2 and I3 having an inclination of about 20 ° shown in FIG. 17 is an oblique cutoff line CL1 of the low beam light distribution pattern LP. It is an optimum reflection image for forming a light distribution including That is, it is easy to make the reflected images from the reflected image I1 having an inclination of about 0 ° to the reflected images I2 and I3 having an inclination of about 20 ° along the oblique cutoff line CL1 having an inclination of about 15 °. . On the other hand, the reflected image including the reflected images I4 and I5 having an inclination of about 40 ° shown in FIG. 18 and having an inclination of about 20 ° or more forms a light distribution including the oblique cut-off line CL1 of the low beam light distribution pattern LP. It is an inappropriate reflection image. That is, when a reflected image having an inclination of about 20 ° or more is made to follow the oblique cut-off line CL1 having an inclination of about 15 °, the light distribution becomes thick in the vertical direction, and excessive near light distribution (that is, distant visibility) This is because it results in a lower light distribution).

  Further, the light distribution in the oblique cut-off line CL1 is responsible for the far visual distribution. For this reason, it is necessary to form a high luminous intensity band (high energy band) for light distribution in the oblique cutoff line CL1. Therefore, the fourth segment 24 of the first reflecting surface in the central portion and the fifth segment 25 of the second reflecting surface are in the energy distribution (Lambertian) Z2 of the light emitting chip 4 as shown in FIG. In the high energy range Z3. In FIGS. 8, 9, and 12, the energy distribution of the lower semiconductor light source 5D is not shown.

  From the above, the optimum reflection surface for forming the light distribution in the oblique cutoff line CL1 is the range in which the reflection images I1 and I2 having an inclination of 20 ° or less among the reflection surfaces of the parabolic free-form surface, and the semiconductor It is determined from the relative relationship with the energy distribution (Lambertian) of the mold light sources 5U, 5D. As a result, the reflective surface optimal for forming the light distribution in the oblique cutoff line CL1, that is, the fourth segment 24 and the fifth segment 25 are within a longitude angle of ± 40 ° from the center O1 of the light emitting chip 4. The range in which the reflected images I1 and I2 of the light-emitting chip 4 are obtained within the range Z1 and having an inclination within an angle (about 20 °) obtained by adding about 5 ° to the inclination angle (about 15 °) of the oblique cutoff line CL1. And is provided within a high energy range Z3 in the energy distribution (Lambertian) Z2 of the light emitting chip 4.

  As shown in FIG. 19 and FIG. 21, the first reflecting surface composed of the fourth segment 24 prevents the reflected images I1 and I2 of the light emitting chip 4 from jumping out from the oblique cut-off line CL1 and the horizontal cut-off line CL2. In addition, the reflected images I1 and I2 of the light emitting chip 4 are used for the low beam so that a part of the reflected images I1 and I2 of the light emitting chip 4 is substantially in contact with the oblique cutoff line CL1 and the horizontal cutoff line CL2. It is a reflecting surface formed of a free-form curved surface that controls light distribution in a range Z4 in the light distribution pattern LP.

  Further, as shown in FIGS. 20 and 21, the second reflecting surface composed of the fifth segment 5 protrudes the reflected images I1 and I3 of the light emitting chip 4 from the oblique cutoff line CL1 and the horizontal cutoff line CL2. The reflection images I1 and I3 of the light emitting chip 4 are partially in contact with the oblique cutoff line CL1 and the horizontal cutoff line CL2, and the reflection images I1 and I3 of the light emitting chip 4 The density of the group is lower than the density of the reflected images I1 and I2 of the light emitting chip 4 by the first reflecting surface composed of the fourth segment 24, and the reflected images I1 and I3 of the light emitting chip 4 are Reflecting images I1 and I2 of the light-emitting chip 4 by the first reflecting surface composed of the fourth segment 24 so as to contain the light-emitting chip 4 Izo I1, a reflecting surface made of a free curved surface with light distribution controlled in the range Z5 of the I3 containing the range Z4 in the light distribution pattern LP for low beam. Note that the density of the reflected images I1 and I2 of the single light emitting chip 4 and the density of the reflected images I1 and I3 of the single light emitting chip 4 are the same or substantially the same.

  Furthermore, as shown in FIG. 21, the third reflecting surface composed of the second segment 22, the third segment 23, the sixth segment 26, and the seventh segment 27 is a reflected image I4 of the light emitting chip 4, Reflection of the light emitting chip 4 by the first reflecting surface in which the density of the reflected images I4 and I5 of the light emitting chip 4 is composed of the fourth segments 24 so that I5 is substantially within the low beam distribution pattern LP. The reflected images I1 and I3 of the light emitting chip 4 are lower than the reflected images I1 and I3 of the light emitting chip 4 due to the second reflecting surface composed of the images I1 and I2 and the fifth segment 25, and the reflected images I4 and I5 of the light emitting chip 4 are Reflected images I1 and I2 of the light emitting chip 4 by the first reflecting surface composed of the fourth segment 24 and the second reflecting surface composed of the fifth segment 25 The reflected images I4 and I5 of the light emitting chip 4 are distributed to the range Z6 including the ranges Z4 and Z5 in the low beam light distribution pattern LP so that the reflected images I1 and I3 of the light emitting chip 4 are included. It is a reflecting surface composed of a free-form surface to be controlled.

  Of the end surfaces of the movable reflectors 13U and 13D other than the third high beam reflecting surfaces (the reflecting surfaces 12U and 12D), at least when the movable reflectors 13U and 13D are located at the first position, the light emitting chip. A surface treatment unit 170 is provided on the end surface facing the surface 4, that is, on the end surface of the through hole 17. The surface treatment unit 170 uses the light L6U and L6D incident on the end surfaces of the through holes 17 of the movable reflectors 13U and 13D located at the first position, out of the light emitted from the light emitting chip 4 as the fixed reflector. In this example, the reflecting surfaces 2U and 2D other than 6 are reflected by the window portion 8 of the fixed reflector 3. That is, the surface treatment unit 170 uses the light L6U and L6D incident on the end surfaces of the through holes 17 of the movable reflectors 13U and 13D located at the first position, out of the light emitted from the light emitting chip 4. The end surface of the through-hole 17 of the movable reflectors 13U and 13D is subjected to surface treatment so that it does not enter the reflecting surfaces 2U and 2D of the fixed reflector 3. In this example, optical control (normal control) is performed. An inclined surface inclined inward is given.

(Description of action)
Hereinafter, the vehicle headlamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  First, the upper movable reflector 13U and the lower movable reflector 13D are positioned at the first position (the positions shown in FIGS. 1, 2, 4, 6, and 8). That is, when the energization of the motor 15 of the driving device 14 is interrupted, the upper movable reflector 13U and the lower movable reflector 13D are positioned at the first position by the action of the spring and the action of a stopper (not shown). At this time, the light emitting chips 4 of the upper semiconductor light source 5U and the lower semiconductor light source 5D are turned on. Then, light is emitted from the light emitting chips 4 of the upper semiconductor light source 5U and the lower semiconductor light source 5D.

  A part of this light, that is, the light L1 emitted to the first high beam reflecting surface (first segment 21 and eighth segment 28) of the fixed reflector 3, as shown in FIG. It is shielded by the side movable reflector 13D. Further, a part of this light, that is, the reflected light L2 reflected by the second high beam reflecting surface (the ninth segment 29 and the tenth segment 20) of the fixed reflector 3 is, as shown in FIG. 6, the upper movable reflector. It is shielded by 13U and the lower movable reflector 13D. Further, as shown in FIG. 6, the remaining light L3 is reflected on the low-beam reflecting surfaces (the second segment 22, the third segment 23, the fourth segment 24, the upper reflecting surface 2U and the lower reflecting surface 2D of the fixed reflector 3). Reflected by the fifth segment 25, the sixth segment 26, and the seventh segment 27). This reflected light L3 is irradiated in front of the vehicle as a low beam light distribution pattern LP shown in FIG. In addition, direct light (not shown) from the light emitting chip 4 of the upper semiconductor type light source 5U and the lower semiconductor type light source 5D is shielded by the upper movable reflector 13U and the lower movable reflector 13D, particularly the flange portion 18. In FIG. 6, illustration of optical paths on the lower reflective surface 2D of the fixed reflector 3 and the lower reflective surface 12D of the lower movable reflector 13D is omitted.

  That is, the reflected light from the first reflecting surface formed of the fourth segments 24 of the reflecting surfaces 2U and 2D is such that the reflected images I1 and I2 of the light emitting chip 4 do not jump out of the oblique cut-off line CL1 and the horizontal cut-off line CL2. The light distribution is controlled to a range Z4 in the low beam light distribution pattern LP so that a part of the reflected images I1 and I2 of the light emitting chip 4 is substantially in contact with the oblique cutoff line CL1 and the horizontal cutoff line CL2.

  In addition, the reflected light from the second reflecting surface composed of the fifth segments 25 of the reflecting surfaces 2U and 2D prevents the reflected images I1 and I3 of the light-emitting chip 4 from jumping out from the oblique cut-off line CL1 and the horizontal cut line CL2. The reflection images I1 and I3 of the light emitting chip 4 are partially in contact with the oblique cutoff line CL1 and the horizontal cut line CL2, and the density of the reflection images I1 and I3 of the light emitting chip 4 is changed from the fourth segment 24. The light emitting chip 4 by the first reflecting surface is lower than the density of the reflected images I1 and I2 of the light emitting chip 4 by the first reflecting surface and the group of reflected images I1 and I3 of the light emitting chip 4 is composed of the fourth segment 24. The light distribution is controlled to a range Z5 including the range Z4 in the low beam light distribution pattern LP so as to include the reflected images I1 and I2.

  Further, the reflected light from the third reflecting surface composed of the second segment 22, the third segment 23, the sixth segment 26, and the seventh segment 27 of the reflecting surfaces 2U and 2D is reflected by the reflected images I4 and I5 of the light emitting chip 4 as a low beam. The density of the reflected images I4 and I5 of the light emitting chip 4 is approximately within the light distribution pattern LP for use, and the reflected images I1 and I2 of the light emitting chip 4 by the first reflecting surface composed of the fourth segment 24 and the fifth The light emitting chip by the first reflecting surface which is lower than the reflected images I1 and I3 of the light emitting chip 4 by the second reflecting surface made of the segment 25 and the reflected images I4 and I5 of the light emitting chip 4 are made by the fourth segment 24. Low-beam light distribution so as to include the reflected images I1 and I3 of the light-emitting chip 4 by the second reflecting surface composed of the four reflected images I1 and I2 and the fifth segment 25 Are light distribution controlled in the range Z6 containing the ranges Z4, Z5 in turn LP.

  Furthermore, as shown in FIG. 1, among the light emitted from the light emitting chip 4, the light L6U and L6D incident on the end surfaces of the through holes 17 of the movable reflectors 13U and 13D are the surface treatment portions of the movable reflectors 13U and 13D. At 170, the light is reflected to the window 8 side of the fixed reflector 3. The reflected lights L7U and L7D travel to the rear side of the lamp units 3, 5U, 5D, 6, 7, 13U, 13D, and 14 through the window 8, and do not enter the reflecting surfaces 2U and 2D of the fixed reflector 3. .

  As described above, the low beam light distribution pattern LP shown in FIG. 21 is irradiated in front of the vehicle.

  Next, the upper movable reflector 13U and the lower movable reflector 13D are positioned at the second position (the positions shown in FIGS. 3, 5, 7, and 9). That is, when the motor 15 of the driving device 14 is energized to drive the motor 15, the driving force of the motor 15 is transmitted to the upper movable reflector 13U and the lower movable reflector 13D via the driving force transmission mechanism 16, and the upper movable The reflector 13U and the lower movable reflector 13D rotate in synchronization with the second position against the spring force and are positioned at the second position by the action of a stopper (not shown). At this time, the light emitting chips 4 of the upper semiconductor light source 5U and the lower semiconductor light source 5D are turned on. Then, light is emitted from the light emitting chips 4 of the upper semiconductor light source 5U and the lower semiconductor light source 5D.

  A part of this light, which is a low-beam reflecting surface (second segment 22, third segment 23, fourth segment 24, fifth segment 25, second segment 25D) of the upper reflector 2U and the lower reflector 2D of the fixed reflector 3. As shown in FIG. 7, a part of the light emitted to the sixth segment 26 and the seventh segment 27) is reflected by the third high beam reflecting surfaces (reflecting surfaces 12U and 12D) of the movable reflectors 13U and 13D. The reflected light L4 is irradiated in front of the vehicle as a third high beam light distribution pattern HP3 shown in FIG. Also, the low-beam reflective surfaces (the second segment 22, the third segment 23, the fourth segment 24, the fifth segment 25, the sixth segment 26, the seventh segment) of the upper reflector 2U and the lower reflector 2D of the fixed reflector 3 27), and the remaining light that has not entered the third high beam reflecting surfaces (reflecting surfaces 12U and 12D) of the movable reflectors 13U and 13D is fixed to the fixed reflector 3 as shown in FIG. FIG. 22 shows the reflected light L3 reflected by the low beam reflecting surface (second segment 22, third segment 23, fourth segment 24, fifth segment 25, sixth segment 26, seventh segment 27). The dimming low beam light distribution pattern LP1 is irradiated in front of the vehicle. Further, when the upper movable reflector 13U and the lower movable reflector 13D are positioned at the first position, the first high beam reflecting surface of the fixed reflector 3 that is shielded by the upper movable reflector 13U and the lower movable reflector 13D ( The light L1 emitted to the first segment 21 and the eighth segment 28) is reflected by the first high beam reflecting surface (the first segment 21 and the eighth segment 28) of the fixed reflector 3, as shown in FIG. The reflected light L5 is irradiated in front of the vehicle as the first high beam light distribution pattern HP1 shown in FIG. Furthermore, when the upper movable reflector 13U and the lower movable reflector 13D are located at the first position, the second high beam reflecting surface of the fixed reflector 3 that is shielded by the upper movable reflector 13U and the lower movable reflector 13D. The reflected light L2 from (the ninth segment 29 and the tenth segment 20) passes through the through holes 17 of the upper movable reflector 13U and the lower movable reflector 13D located at the second position, as shown in FIG. A second high beam light distribution pattern HP2 shown in FIG. In FIG. 7, illustration of optical paths on the lower reflective surface 2D of the fixed reflector 3 and the lower reflective surface 12D of the lower movable reflector 13D is omitted.

  As described above, the high beam light distribution patterns HP1, HP2, HP3, and LP1 shown in FIG. 22 are irradiated in front of the vehicle.

(Explanation of effect)
The vehicle headlamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicle headlamp 1 according to the first embodiment, when the upper movable reflector 13U and the lower movable reflector 13D are located at the first position, the light emitting chips 4 of the upper semiconductor type light source 5U and the lower semiconductor type light source 5D are used. When the light is emitted, light emitted from the light-emitting chip 4 is reflected on the low-beam reflecting surface of the fixed reflector 3 (second segment 22, third segment 23, fourth segment 24, fifth segment 25, sixth segment 26, seventh segment). Reflected by the segment 27), the reflected light L3 is irradiated in front of the vehicle as a low beam light distribution pattern LP. Further, when the light emitting chip 4 of the upper semiconductor light source 5U and the lower semiconductor light source 5D is turned on when the upper movable reflector 13U and the lower movable reflector 13D are positioned at the second position, the light is emitted from the light emitting chip 4. Are reflected on the third high beam reflecting surfaces 2U and 2D of the upper movable reflector 13U and the lower movable reflector 13D, and on the first high beam reflecting surfaces (first segment 21 and eighth segment 28) of the fixed reflector 3 and on the second high beam. Reflecting surface (9th segment 29, 10th segment 20) and low beam reflecting surface (2nd segment 22, 3rd segment 23, 4th segment 24, 5th segment 25, 6th segment 26, 7th segment 27) The reflected lights L2, L3, L4, and L5 are reflected by the high beam distribution pattern. As emissions HP1, HP2, HP3, LP1, it is illuminated toward the forward direction of the vehicle, respectively.

  In addition, the vehicle headlamp 1 according to the first embodiment includes a fixed reflector 3, an upper movable reflector 13U, a lower movable reflector 13D, an upper semiconductor light source 5U, a lower semiconductor light source 5D, and a driving device 14. Therefore, compared with the conventional vehicle headlamp, the second light source unit for the high beam light distribution pattern is not required, and the number of parts can be reduced, so that the size, weight, power saving, Cost reduction can be achieved.

  In particular, in the vehicle headlamp 1 according to the first embodiment, when the movable reflectors 13U and 13D are positioned at the first position by the surface treatment unit 170 provided on the end surface of the through hole 17 of the movable reflectors 13U and 13D. Even if a part of the light L6U, L6D emitted from the light emitting chip 4 is incident on the end face (end face of the through hole 17) facing the light emitting chip 4 of the movable reflectors 13U, 13D, the light L6U, L6D is fixed. In this example other than the reflecting surfaces 2U and 2D of the reflector 3, the light can be reflected by the window portion 8 of the fixed reflector 3. As a result, the vehicle headlamp 1 according to the first embodiment has the movable reflectors 13U and 13D positioned at the first position, that is, when the low beam light distribution pattern LP is irradiated in front of the vehicle. Lights L7U and L7D reflected from the end surfaces of the through holes 17 of the movable reflectors 13U and 13D are incident on the reflecting surfaces 2U and 2D of the fixed reflector 3 and are reflected as uncontrolled reflected light other than the low beam light distribution pattern LP. Therefore, the low beam light distribution pattern LP can be obtained with certainty.

  Here, an optical path in the case of a vehicle headlamp in which the surface treatment unit 170 is not provided on the end face of the through hole 17 of the movable reflectors 13U and 13D will be described with reference to FIG. When part of the light L6U, L6D emitted from the light emitting chip 4 is incident on the end face (end face of the through hole 17) facing the light emitting chip 4 of the movable reflectors 13U, 13D located at the first position, the light L6U, L6D. Is reflected at the end face of the through hole 17 of the movable reflectors 13U, 13D. The reflected lights L8U and L8D may enter the reflecting surfaces 2U and 2D of the fixed reflector 3 and be reflected by the reflecting surfaces 2U and 2D of the fixed reflector 3. When the reflected lights L9U and L9D reflected by the reflecting surfaces 2U and 2D of the fixed reflector 3 are irradiated in front of the vehicle as a stray light zone PU and a road surface light distribution uneven zone PD (a zone surrounded by a dotted line in FIG. 21). There is. That is, the uneven light distribution zone PD is formed on the front side of the road surface by the reflected light L9U from the upper reflecting surface 2U of the fixed reflector 3. On the other hand, the stray light zone PU is formed above by the reflected light L9D reflected by the lower reflecting surface 2D of the fixed reflector 3. Since the stray light zone PU and the road surface light distribution unevenness zone PD are not subjected to light distribution control, it is not preferable to irradiate the vehicle in front of the vehicle.

  On the other hand, since the vehicle headlamp 1 according to the first embodiment is provided with the surface treatment portion 170 on the end face of the through hole 17 of the movable reflectors 13U and 13D, as described above, the light emitting chip 4 Even if part of the light L6U, L6D emitted from the light enters the end face (end face of the through hole 17) facing the light emitting chip 4 of the movable reflectors 13U, 13D located at the first position, The formation of the stray light zone PU and the road surface light distribution unevenness zone PD can be reliably prevented, and the low beam light distribution pattern LP can be reliably obtained.

  Further, the vehicle headlamp 1 according to the first embodiment is light emitted from the light emitting chip 4 when the movable reflectors 13U and 13D are located at the first position, and is a surface of the end face of the movable reflectors 13U and 13D. Lights L6U and L6D incident on the processing unit 170 can be reflected on the light emitting chip 4 side, in this example, the window 8 of the fixed reflector 3. As a result, the vehicle headlamp 1 according to the first embodiment emits the light L7U and L7D reflected by the end surfaces of the movable reflectors 13U and 13D when the low-beam light distribution pattern LP is irradiated in front of the vehicle. In this example on the chip 4 side, since it is reflected by the window 8 of the fixed reflector 3, the low beam light distribution pattern LP can be obtained more reliably. As shown in FIG. 1, the vertical width W of the window portion 8 is slightly larger than the vertical width of the surface treatment portion 170 at the end face of the movable reflectors 13U and 13D located at the first position. The incident light can be reliably reflected on the window 8 of the fixed reflector 3 in this example on the light emitting chip 4 side.

  FIG. 24 shows a second embodiment of a vehicle headlamp according to the present invention. Hereinafter, the vehicle headlamp in the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 23 denote the same components.

  The vehicle lamp 1 according to the first embodiment can obtain the high beam light distribution patterns HP1, HP2, HP3, and LP1 when the movable reflectors 13U and 13D are located at the second position. On the other hand, in the vehicle headlamp according to the second embodiment, when the movable reflectors 13U and 13D are at least in the second position, that is, when the movable reflectors 13U and 13D are located in the second position, the high beam distribution is performed as described above. When the light patterns HP1, HP2, HP3, LP1 are obtained and the movable reflectors 13U, 13D are located at the third position, as shown in FIG. 24, the light distribution patterns for daytime running lights dP1, DP2, DP3, DP4, DP5 is obtained.

  In the first and second embodiments, the low beam light distribution pattern LP will be described. However, in the present invention, a light distribution pattern other than the low beam light distribution pattern LP, for example, a highway light distribution pattern, a fog lamp light distribution pattern, etc., has an oblique cut-off line on the traveling lane side at the elbow point. And a light distribution pattern having a horizontal cut line on the opposite lane side.

  Moreover, in the said Example 1, 2, the vehicle headlamp 1 for left side driving lanes is demonstrated. However, the present invention can also be applied to a vehicle headlamp for the right lane.

  Further, in the first and second embodiments, the upper unit composed of the upper reflective surfaces 2U and 12U and the upper semiconductor light source 5U, and the lower unit composed of the lower reflective surfaces 2D and 12D and the lower semiconductor light source 5D. The vehicle headlamp 1 in which the units are arranged in a point-symmetric state will be described. However, in the present invention, the vehicle headlamp composed of only the upper unit composed of the upper reflecting surfaces 2U and 12U and the upper semiconductor light source 5U, or the lower reflecting surfaces 2D and 12D and the lower semiconductor type. The vehicle headlamp comprised only from the lower unit which consists of light source 5D may be sufficient.

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2U Upper reflective surface 2D Lower reflective surface 3 Fixed reflector 4 Light emitting chip 5U Upper semiconductor type light source 5D Lower semiconductor type light source 6 Holder 7 Heat sink member 8 Window part 9 Invalid surface 10 Substrate 11 Sealing member 12U Upper reflective surface (3rd high beam reflective surface)
12D Lower reflective surface (3rd high beam reflective surface)
13U Upper movable reflector 13D Lower movable reflector 14 Driving device 15 Motor 16 Driving force transmission mechanism 17 Through-hole 18 ridge 21 First segment (first high beam reflecting surface)
22 Second segment (low beam reflecting surface, third reflecting surface)
23 Third segment (low beam reflective surface, third reflective surface)
24 4th segment (low beam reflecting surface, first reflecting surface)
25 Fifth segment (low beam reflecting surface, second reflecting surface)
26 Sixth segment (low beam reflecting surface, third reflecting surface)
27 7th segment (low beam reflective surface, third reflective surface)
28 8th segment (first high beam reflective surface)
29 9th segment (2nd high beam reflecting surface)
20 10th segment (second high beam reflective surface)
170 Surface treatment part E Elbow point CL1 Oblique cut-off line CL2 Horizontal cut line LP Low beam light distribution pattern LP1 Dimming low beam light distribution pattern HP1 First high beam light distribution pattern HP2 Second high beam light distribution pattern HP3 Third high beam Light distribution pattern HL-HR Horizontal lines on the left and right sides of the screen VU-VD Vertical lines on the top and bottom of the screen PU Stray light zone PD Road surface uneven distribution zone DP1 Light distribution pattern for the first daytime running light DP2 Light distribution pattern for the second daytime running light DP3 Light distribution pattern for the third daytime running light DP4 Light distribution pattern for the fourth daytime running light DP5 Light distribution pattern for the fifth daytime running light O Point target center point O1 Light emitting chip center F Reference focal point of reflecting surface of constant reflector F1 Reference focal point of reflecting surface of movable reflector X Horizontal axis Y Vertical axis Z Reference optical axis of reflecting surface of fixed reflector Z7 Reference optical axis of reflecting surface of movable reflector P1 Fourth and fifth segments Boundary between segments P2 Boundary between third segment and fourth segment P3 Boundary between fifth segment and sixth segment P4 Boundary between second segment and third segment P5 Boundary between sixth segment and seventh segment I1 Boundary Reflected image of light emitting chip at P1 I2 Reflected image of light emitting chip at boundary P2 I3 Reflected image of light emitting chip at boundary P3 I4 Reflected image of light emitting chip at boundary P4 I5 Reflected image of light emitting chip at boundary P5 Z1 Longitude from center of light emitting chip Angle within ± 40 ° Z2 Energy distribution range of light emitting chip Z3 Energy range Z4 Light distribution range by the first reflecting surface Z5 Light distribution range by the second reflecting surface Z6 Light distribution range by the third reflecting surface L1 Light emitted to the first high beam reflecting surface L2 On the second high beam reflecting surface Reflected reflected light L3 Reflected light reflected by low beam reflecting surface L4 Reflected light reflected by third high beam reflecting surface L5 Reflected light reflected by first high beam reflecting surface W Vertical width of window portion

Claims (3)

In a vehicle headlamp that switches between a low beam distribution pattern and a high beam distribution pattern and irradiates the front of the vehicle,
A fixed reflector having a reflective surface composed of a parabolic free-form surface;
A movable reflector having a reflecting surface made of a parabolic free-form surface;
A semiconductor light source having a light emitting chip;
A holder on which the movable reflector is rotatably mounted around a horizontal axis passing through the center of the light emitting chip or the vicinity thereof;
A drive device for rotating the movable reflector between a first position and at least a second position about the horizontal axis;
With
The reference focal point of the reflecting surface of the fixed reflector and the reference focal point of the reflecting surface of the movable reflector are coincident or substantially coincide with each other, and located at or near the center of the light emitting chip,
The reference optical axis of the reflecting surface of the fixed reflector and the reference optical axis of the reflecting surface of the movable reflector are coincident or substantially coincide with each other, and are orthogonal to the horizontal axis, and further, the center of the light emitting chip or the center thereof. Through the neighborhood,
The area of the reflective surface of the fixed reflector is larger than the area of the reflective surface of the movable reflector,
The reference focal length of the reflecting surface of the fixed reflector is larger than the reference focal length of the reflecting surface of the movable reflector,
The reflective surface of the fixed reflector is composed of a low beam reflective surface that forms the low beam light distribution pattern, and at least a high beam reflective surface that forms the high beam light distribution pattern,
The reflective surface of the movable reflector is composed of at least a high-beam reflective surface that forms the high-beam light distribution pattern,
When the movable reflector is positioned at the first position, the light emitted from the light emitting chip to at least the high beam reflecting surface of the fixed reflector, or the reflection reflected by at least the high beam reflecting surface of the fixed reflector. Light is shielded by the movable reflector, and reflected light reflected by the low beam reflecting surface of the fixed reflector is irradiated to the front of the vehicle as the low beam light distribution pattern,
When the movable reflector is at least in the second position, reflected light reflected by at least the high beam reflecting surface of the movable reflector, and reflected light reflected by at least the high beam reflecting surface of the fixed reflector; And the reflected light reflected by the reflection surface for low beam of the fixed reflector is irradiated at the front of the vehicle as at least the light distribution pattern for high beam,
Of the end surfaces other than the reflecting surface of the movable reflector, at least when the movable reflector is positioned at the first position, the light emitted from the light emitting chip is fixed to the end surface facing the light emitting chip. A surface treatment unit that reflects the reflective surface other than the reflecting surface is provided,
A vehicle headlamp characterized by that. The surface treatment unit is a surface treatment unit that reflects light emitted from the light emitting chip to the light emitting chip side.
The vehicle headlamp according to claim 1. The fixed reflector is provided with a window portion where the holder is located,
The surface treatment portion is a surface treatment portion that reflects light emitted from the light emitting chip to the window portion.
The vehicle headlamp according to claim 1 or 2, characterized in that

Images