JP2021093325A - Vehicular lamp - Google Patents

Abstract

To provide a vehicular lamp preventing light unevenness at an emission surface portion of a light guide body in a lamp equipped with the light guide body.SOLUTION: A vehicular lamp is equipped with a light guide body (edge light guide) 21 leading and emitting light incident from a light source 20. The light guide body 21 is equipped with an incident surface portion 211 on which the light of the light source 20 is incident, an emission surface portion 213 emitting the light, and a reflection surface portion 212 internally reflecting the light toward the emission surface portion 213. The reflection surface portion 212 is composed of a plurality of reflection surface portions 212 adjacently disposed, and is equipped with a reflection step 218 internally reflecting the light to a border surface 217 of each reflection surface portion 212 while dispersing or diffusing the light. In the reflection step 218, a plurality of semi-cylindrical optical steps is aligned. The reflection step 218 makes the brightness of the light emitted from the emission surface portion 213 uniform.SELECTED DRAWING: Figure 10

Description

The present invention relates to a vehicle lamp provided with a light guide (light guide) that guides light from a light source incident on an incident surface portion and emits light from the exit surface portion.

Vehicle lamps, particularly automobile lamps, are provided with a lamp in which a plurality of lamp units are combined, and an edge lamp unit including a light guide is proposed as one of the lamp units. As this edge lamp unit, for example, the technique of Patent Document 1 has been proposed. In this technique, a plate-shaped light guide, that is, one end surface (edge) of an edge light guide is configured as an exit surface portion, and a light source incident on an incident surface portion provided on the opposite side of the edge light guide. The light is guided (guided) and emitted from the emission surface portion to emit a narrow or line-shaped pattern light. By providing such an edge lamp unit, a lamp having excellent design can be configured.

In the edge lamp unit of Patent Document 1, a plurality of light sources are arranged along the longitudinal direction of the edge light guide in order to make the brightness of the light emitted from the emission surface portion uniform, and each light source is formed on the emission surface portion. It is configured to emit light by sharing the entire surface. Further, in order to guide the light incident from the plurality of light sources toward the exit surface portion in a substantially uniform state, the edge light guide is provided with a plurality of reflection surface portions corresponding to each light source.

JP-A-2019-67521

In the edge lamp unit of Patent Document 1, the emission surface portion of the edge light guide is inclined, and correspondingly, the plurality of reflection surface portions are formed in a stepped shape along the inclination of the emission surface portion. Therefore, a stepped portion is generated at the boundary between the plurality of reflecting surface portions, and it becomes difficult to evenly reflect light toward the emitting surface portion at the boundary surface generated by the stepped portion. When such a reflection situation occurs, the light guided to the exit surface portion is not uniform and the brightness unevenness occurs in the exit surface portion, the light distribution characteristic when the edge lamp unit is turned on deteriorates, and the lamp There is a risk that the appearance of the lamp will deteriorate and the design will deteriorate.

An object of the present invention is to provide a vehicle lamp in which a lamp provided with a light guide such as an edge lamp unit prevents light unevenness on an exit surface of the light guide.

The present invention is a vehicle lamp including a light source and a light guide body that guides and emits light incident from the light source. The light guide body has an incident surface portion on which the light of the light source is incident and a light guide. It is provided with an exit surface portion that emits the emitted light and a reflection surface portion that internally reflects the light incident from the incident surface portion toward the exit surface portion. On top of that, the reflecting surface portion is composed of a plurality of reflecting surface portions arranged adjacent to each other, and is provided with a reflection step for internally reflecting light in a state of diverging or diffusing the light on the boundary surface of the plurality of reflecting surface portions.

In such a configuration of the present invention, the reflection step is, for example, a configuration in which a plurality of semi-cylindrical optical steps are arranged.

In the present invention, for example, the exit surface portion is configured as an inclined surface, and the plurality of reflecting surface portions are arranged in a stepped manner along the inclined direction of the exit surface portion and intersect the inclined direction between adjacent reflecting surface portions. A boundary surface extending in the direction is formed.

The light guide to which the present invention is applied is preferably composed of a translucent plate-shaped member, an incident surface portion is formed on a part of one plate surface of the plate-shaped member, and the other plate-shaped member is formed. A reflective surface portion is formed on a portion of the plate surface facing the incident surface portion, and a reflective surface portion is formed on the end surface of the plate-shaped member.

According to the present invention, since the reflection step is formed on the boundary surface existing between the plurality of reflecting surface portions, the light projected on the boundary surface is reflected in a divergent state or a diffused state and reflected in a specific direction. Can be prevented. As a result, it is possible to prevent the light reflected by the boundary surface from being emitted from a part of the exit surface portion, suppress the unevenness of the brightness of the light on the exit surface portion, and emit the light with uniform brightness to distribute the light. It is possible to obtain a vehicle lamp having excellent properties and design.

The front view of the automobile provided with the vehicle lamp of this invention as a headlamp. FIG. 3 is a schematic perspective view in which a part of the left headlamp shown in FIG. 1 is broken. Block configuration diagram of the electrical system of the lamp unit. An exploded perspective view of a low beam and high beam lamp unit. The schematic vertical sectional view explaining the lighting state of a low beam and a high beam. The exploded perspective view which shows the schematic structure of the edge lamp unit. Cross-sectional view of an edge lamp unit and a side lamp unit arranged in a lamp housing. (A) is a cross-sectional view of the edge light guide on the reflective surface portion, and (b) is an external perspective view thereof. (A) is a schematic perspective view of the exit surface portion, and (b) is a cross-sectional view thereof. (A) is a diagram of a schematic longitudinal structure of an edge light guide, and (b) is a schematic perspective view of a part thereof. (A) is a schematic perspective view of the rod lamp unit, and (b) is a sectional view taken along line bb thereof. (A) is an external view of a part of the rod lamp unit, and (b) is a schematic cross-sectional view of the rod light guide. Schematic front view of the lighting state of the light guide type lamp unit. Schematic exploded perspective view of the side lamp unit.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an automobile provided with a headlamp configured as a vehicle lamp of the present invention, and has headlamps HL on the left and right sides of the front portion of the vehicle body of the automobile CAR, that is, right headlamp R-HL and left headlamp L-. Equipped with HL. These left and right headlamps R-HL and L-HL are configured as a composite headlamp having a plurality of lamp units, and the right headlamp R-HL and the left headlamp L-HL are configured symmetrically. There is.

FIG. 2 is a schematic perspective view of the left headlamp L-HL shown in FIG. 1 which is partially broken when viewed from the front. In the left headlamp L-HL, the lamp housing 100 is composed of a lamp body 101 and a translucent cover 102 mounted so as to cover the front surface side of the lamp body 101. The lamp housing 100 includes a wraparound portion 100a extending from the front side region of the automobile CAR toward the outside (right side in FIG. 2) in the vehicle width direction. Further, the translucent cover 102 has a shape in which the front surface is tilted backward so as to follow the curved surface shape of the front portion of the vehicle body of the automobile CAR.

A plurality of lamp units are arranged in the lamp housing 100. Here, a low beam lamp unit LoU and a high beam lamp unit HiU as headlights, an edge lamp unit EgU and a rod lamp unit RoU as auxiliary lightings, and a side lamp unit SiU as indicator lamps are arranged. The low beam lamp unit LoU and the high beam lamp unit HiU are configured as a reflector type lamp unit, the edge lamp unit EgU and the rod lamp unit RoU are configured as a light guide type lamp unit, and the side lamp unit SiU is a lens type lamp unit. It is configured.

Further, in the lamp housing 100, an extension 103 that also functions as a pseudo-reflector is arranged in an area other than the lamp units, and each lamp unit in the lamp housing 100 is transparent to the translucent cover 102. It prevents the area other than the above from being exposed. In the following, unless otherwise specified, the front-rear direction is the front-rear direction of the automobile CAR and the left head lamp L-HL, and the left-right direction is based on FIGS. 1 and 2. The outside of the direction is on the right side.

The outline of each lamp unit will be described. In FIG. 2, the low beam lamp unit LoU and the high beam lamp unit HiU are integrally formed side by side in the left-right horizontal direction with the low beam lamp unit LoU on the right side, that is, outside in the vehicle width direction. The low beam lamp unit LoU and the high beam lamp unit HiU are a first light source and a second light source, and a reflector that reflects the light emitted from the first light source and the second light source and irradiates the front of the vehicle with a required light distribution pattern. It has.

The edge lamp unit EgU is arranged outside the low beam lamp unit LoU in the vehicle width direction. This edge lamp unit EgU includes a third light source and an edge light guide composed of a plate-shaped light guide (translucent body), guides the light of the third light source with the edge light guide, and guides the light of the third light source to the edge. The configuration is such that the light guide is emitted from the front end surface, that is, the edge, and is emitted toward the front of the automobile.

The rod lamp unit RoU extends horizontally along the upper edges of the low beam lamp unit LoU and the high beam lamp unit HiU. This rod lamp unit RoU includes a rod light guide composed of a fourth light source and a rod-shaped light guide (translucent body), and guides the light of the fourth light source in the length direction with the rod light guide. , The rod light guide is configured to emit light from the peripheral surface extending in the length direction toward the front of the automobile.

In this embodiment, the edge lamp unit EgU and the rod lamp unit RoU described above function as a clearance lamp or a daytime running lamp by controlling their lighting. That is, when the edge lamp unit EgU and the rod lamp unit RoU are simultaneously lit with a predetermined brightness, both lamp units EgU and RoU integrally function as a clearance lamp. Also, when it is lit with a higher brightness than this, it functions as a daytime running lamp.

The side lamp unit SiU includes a fifth light source and a lens unit that emits light emitted from the fifth light source toward a required region on the side of the automobile. The side lamp unit SiU is arranged outside the edge lamp unit EgU in the vehicle width direction, particularly on the wraparound portion 100a of the lamp housing 100.

FIG. 3 is a block configuration diagram of an electric system of each of the lamp units LoU, HiU, EgU, RoU, and SiU. Each of the lamp units LoU, HiU, EgU, RoU, and SiU is connected to the lamp ECU (electronic control unit) 5, and power is supplied from an in-vehicle battery (not shown in the figure) as a power source. In FIG. 3, L1 to L5 are the first to fifth light sources in the lamp units LoU, HiU, EgU, RoU, and SiU described above.

The lamp ECU 5 includes a light emission control unit 51, and the light emission of each light source of each lamp unit, that is, the first to fifth light sources L1 to L5 described above is controlled by the light emission control unit 51, and each lamp unit LoU, The lighting of HiU, EgU, RoU, and SiU is controlled. Further, the lamp ECU 5 is provided with a light emission adjusting unit 52, and it is possible to adjust the brightness of the edge lamp unit EgU and the rod lamp unit RoU, that is, the emission luminosity of the third light source L3 and the fourth light source L4. There is.

Further, the lamp lighting switch SW1, the beam changeover switch SW2, the function changeover switch SW3, and the turn switch SW4 are connected to the lamp ECU 5 and operated by the driver. The edge lamp unit EgU and the rod lamp unit RoU are turned on when the lamp lighting switch SW1 is turned on. In addition, the brightness can be switched by the function changeover switch SW3. The low beam lamp unit and the high beam lamp unit are turned on and off by switching the beam changeover switch SW2. Here, the side lamp unit SiU is made to blink as a turn signal lamp when the turn switch SW4 is turned on.

Next, the details of each of the lamp units LoU, HiU, EgU, RoU, and SiU will be described.
(Low beam lamp unit LoU and high beam lamp unit HiU)
FIG. 4 is a schematic exploded perspective view of the low beam lamp unit LoU and the high beam lamp unit HiU. The low beam lamp unit LoU includes a first light source L1 and a reflector 11, and the high beam lamp unit HiU includes a second light source L2 and a reflector 12.

The first light source L1 and the second light source L2 are each composed of a plurality of (here, three) white LEDs 10 that emit white light. These six white LEDs 10 are mounted on the lower surface of the A substrate 1A horizontally supported on the upper portions of the reflectors 11 and 12 at a required interval in the left-right direction with the light emitting surface facing downward. ing. The A substrate 1A is mounted on the upper surfaces of the reflectors 11 and 12, and the white LEDs 10 correspond to the reflectors 11 and 12 of the low beam lamp unit LoU and the high beam lamp unit HiU. It is arranged in the windows of the notch windows 111 and 121 provided at the upper part. The A substrate 1A is electrically connected to the lamp ECU 5 via the connector 114.

The reflectors 11 and 12 are integrally formed here, and three reflecting surface portions 112 and 122 are arranged side by side in the left-right direction. These reflecting surface portions 111 and 1222 are each configured as a parabolic surface (parabolic surface) or a light reflecting surface having a shape similar to this, but some configurations are different between the high beam lamp unit and the low beam lamp unit. .. Each of the reflecting surface portions 112 and 122 reflects the light emitted from the corresponding white LED 10 toward the front, transmits the light through the translucent cover 102, and irradiates the light toward the front region of the automobile. The reflectors 11 and 12 are fixed to the lamp body 101 by using the fixing pieces 113 and 123 provided in a part thereof.

With this configuration, in the low beam lamp unit LoU, when the lamp lighting switch SW1 is turned on and the beam changeover switch SW2 is set to the low beam, the first light source L1 is emitted. As shown in the schematic cross-sectional view of FIG. 5, the light emitted by the first light source L1, that is, the white LED 10, is reflected by the reflecting surface portion 112 of the reflector 11, is irradiated toward the front of the automobile, and is illuminated by the low beam light distribution. I do. Further, when the beam changeover switch 212 is switched, the second light source L2 is emitted, and although not shown, the high beam arrangement is achieved by adding the light reflected by the reflection surface portion 122 of the reflector 12 to the low beam light distribution described above. Illuminate with light.

(Edge lamp unit EgU)
FIG. 6 is an exploded perspective view showing a schematic configuration of the edge lamp unit, and FIG. 7 is a cross-sectional view of the edge lamp unit arranged in the lamp housing 100. The side lamp unit SiU is also shown in FIG. 7. As shown in FIGS. 6 and 7, the edge lamp unit EgU is composed of a third light source L3 and an edge light guide 21.

The edge light guide 21 is composed of a light guide plate (light guide plate) having a substantially plate shape made of a transparent resin material, and is supported by the lamp body 101 as described later. The edge light guide 21 is extended along the front-rear direction of the left headlamp L-HL so that the plate surfaces on both sides are vertically opposed to each other in the left-right direction. Hereinafter, the outer plate surface in the vehicle width direction will be referred to as an outer surface, and the inner plate surface in the opposite vehicle width direction will be referred to as an inner surface. Further, the direction in which the edge light guide 21 is extended is referred to as an optical axis direction.

The third light source L3 is composed of a white LED 20 mounted on a B substrate 1B arranged adjacently along the outer surface of the edge light guide 21. The B substrate 1B is integrally connected along the outer surface of the edge light guide 21. Here, the snap 211 is integrally formed with a part of the edge light guide 21, and the snap 210 is connected by fitting into the connecting hole 220 provided in the B substrate 1B. The B substrate 1B is arranged so as to cover a wide area of the outer surface of the edge light guide 21 as much as possible within a range that does not interfere with the arrangement of the edge light guide 21 in order to enhance the light-shielding property described later. Is preferable.

The white LED 20 as the third light source L3 is mounted on the surface of the B substrate 1B facing the outer surface of the edge light guide. Here, three white LEDs 20 are mounted at required intervals in the vertical direction and at positions slightly offset in the front-rear direction, and each white LED 20 incidents the emitted light on the outer surface of the edge light guide 21. Let me. Further, the B substrate 1B is electrically connected to the lamp ECU 5 via the connector 222.

The edge light guide 21 is configured as an incident surface portion 211 as a part of the outer surface, that is, a surface region on which the light of the third light source L3 is incident. Further, a reflecting surface portion 212 that internally reflects the incident light is formed on a part of the inner surface opposite to the outer surface. Further, the front end surface of the edge light guide 21 directed to the front is configured as an exit surface portion 213 that emits light internally reflected by the reflection surface portion 212. The exit surface portion 213 is tilted backward in the vertical direction along the front shape of the translucent cover 102, and is tilted in the horizontal direction toward the outside in the vehicle width direction.

Of the outer surface of the edge light guide 21 facing the third light source L3 composed of the white LED 20, the region near the rear end is formed to be slightly thicker than the region on the front side. This region is configured as the incident surface portion 211 described above. The light emitted from the third light source L3 is incident on the incident surface portion 211.

As shown in FIG. 6, the reflecting surface portion 212 of the edge light guide 21 is formed on the inner surface surface opposite to the incident surface portion 211. The reflecting surface portion 212 is configured as three reflecting surface portions arranged in the vertical direction corresponding to the three white LEDs 20 configured as the third light source L3. In this embodiment, the three white LEDs 20 are sequentially arranged so as to be displaced forward from the top to the bottom, and correspondingly, the three reflecting surface portions 212 are also sequentially directed to the front from the top to the bottom. It is arranged in a staircase pattern. In the following, the reflective surface portion 212 may be described with the meaning of an individual reflective surface portion or a generic meaning of the three reflective surface portions.

The configurations of these three reflecting surface portions 212 are the same, and one of them will be described. FIG. 8A is a cross-sectional view of the edge light guide 21 on the reflective surface portion 212. The inner surface of the edge light guide 21 constituting the incident surface portion 212 basically has a virtual focus near the corresponding white LED 20, and is rotated around a virtual line extending in the front-rear direction through the virtual focus. It is composed of a part of the object surface. With such a surface shape configuration, the light from the white LED 20 incident from the incident surface portion 211 is projected onto the reflective surface portion 212, reflected internally, and guided (guided) in the optical axis direction to guide the light from the exit surface portion 213. The light is guided to the front end face configured as.

Here, among the light projected on the inner surface of the reflecting surface portion 212, the light projected on the region capable of satisfying the critical angle determined based on the refractive index of the translucent resin constituting the edge light guide 21 is It is totally reflected on the inner surface and guided to the exit surface portion 213. On the other hand, the light projected on the reflecting surface portion 212 in the rear end side region of the edge light guide 21 cannot satisfy the critical angle because it is incident on the inner surface at a small angle, and is totally reflected as shown by the chain line. Without being done, it passes through the reflective surface portion 212 and leaks to the outside of the edge light guide 21.

Therefore, in the reflecting surface portion 212, the region satisfying the critical angle is configured as a single reflecting surface 212m that performs one reflection, and the shape of the rotating paraboloid is left as it is. On the other hand, the region that does not satisfy the critical angle is configured as the double reflection surface 212p. FIG. 8B is an external perspective view of the double reflection surface 212p, which has a mountain line (ridge line) y and a valley line t extending in a fan shape with the above-mentioned virtual focal point as a main point, and has a triangular roof shape in the circumferential direction. It is configured in the shape of. The mountain line y is extended along the rotating parabola, and the valley line t is extended along the rotating parabola based on a parabola having a coefficient value different from that of the mountain line y. Therefore, each inclined surface (roof surface) r of the plurality of triangular roof types arranged in a fan shape is configured such that the rotating paraboloids are alternately inclined in the circumferential direction.

In the double reflection surface 212p, the surface angle of each inclined surface r of the triangular roof type in the circumferential direction with respect to the incident surface portion 211 is increased. Therefore, the light incident on each inclined surface r is internally reflected by increasing the incident angle in the circumferential direction to satisfy the critical angle (first internal reflection). The light reflected on the inner surface is incident on the inclined surface r adjacent to or distant from the inner surface, and is also internally reflected to satisfy the critical angle on this surface (secondary inner surface reflection). Further, since each inclined surface r is inclined along the parabola in the optical axis direction, the light reflected internally in the primary and secondary directions is directed to the optical axis direction as a result. Become.

Therefore, in the edge light guide 21, a part of the light incident on the incident surface portion 211 is guided toward the exit surface portion 213 by the primary internal reflection, that is, one internal reflection on the single reflection surface 212 m. The other light is guided toward the exit surface portion 213 by the primary and secondary internal reflections, that is, a plurality of internal reflections on the double reflection surface 212p. As a result, the light leaked to the outside of the edge light guide 21 can be suppressed in the reflecting surface portion 212, and the light reflection efficiency in the reflecting surface portion 212 can be improved.

In the edge light guide 21, the light from the white LED 20 corresponding to each of the three reflecting surface portions 212 is internally reflected, guided in the direction of the optical axis, and emitted from the exit surface portion 213. FIG. 9A is a schematic perspective view of the exit surface portion 213, and a refraction step 215 that refracts light into a divergent state is formed on the front end surface constituting the exit surface portion 213. In this embodiment, a large number of minute spherical steps are arranged as the refraction step 215. By providing the refraction step 215, as shown in the cross-sectional view in FIG. 9B, the light reflected by the three reflecting surface portions 212 and guided in the optical axis direction is generated by each refraction step 215. It is refracted and emitted in a divergent state, and is irradiated toward a wide required area in front of the automobile.

Further, as shown in FIG. 9A, the edge light guide 21 of this embodiment covers a region along one edge of the exit surface portion 231, that is, a region on the front end side of the inner surface of the edge light guide 21. A side exit step 216 projecting inward in the vehicle width direction is provided. This lateral exit step 216 has a horizontal cross-sectional shape protruding from the inner side surface in a trapezoidal shape, and a wedge-shaped portion 216a on the lower bottom side located on the front side in the optical axis direction is projected forward from the exit surface portion 213. ing. The lateral emission step 216 is formed along the emission surface portion 213 of the edge light guide 21 over almost the entire length in the vertical direction.

With this configuration, as shown in FIG. 9B, most of the light reflected by the reflecting surface portion 212 is directed in the optical axis direction of the edge light guide 21, but some light is directed in the optical axis direction. It may be directed in an inclined direction with respect to the light, and may not be suitably emitted from the exit surface portion 213. When this part of the light is guided to the side exit step 216, it is reflected on the upper bottom surface of the side exit step 216 or at least one of the front and rear slopes, and is projected forward from the exit surface portion 213. It is emitted from the wedge-shaped portion 216a. In this wedge-shaped portion 216a, in the direction toward the outside in the vehicle width direction inclined with respect to the optical axis direction of the edge light guide 21 due to the reflection on the inner surface, that is, in the region on the left side of the left headlamp L-HL. It is irradiated toward.

Therefore, the light irradiation to a wide area by the optical step 215 in the exit surface portion 213 and the light irradiation to the outside in the vehicle width direction by the side emission step 216 are combined, and the edge lamp unit EgU capable of irradiating an extremely wide area. Is configured as.

As described above, the three reflecting surface portions 212 are arranged in a staircase pattern. That is, as shown in FIG. 10A showing the substantially longitudinal structure of the edge light guide 21, the three reflecting surface portions 212 are sequentially displaced forward from top to bottom. Therefore, a boundary surface 217 extending along the optical axis direction is formed between the reflecting surface portions 212, and a part of the light that is not internally reflected in the optical axis direction at each reflecting surface portion 212 is this. It is incident on the boundary surface.

Assuming that the boundary surface 217 is a flat surface, a part of the light is internally reflected at the boundary surface 217 in a specular reflection state as shown by a chain line. FIG. 10A shows an example of reflection on the upper boundary surface 217. The light reflected on the inner surface is guided upward by a required angle with respect to the optical axis direction, and is emitted from the exit surface portion 213. Since this light is reflected by each reflecting surface portion 212 and superimposed on the light guided in the optical axis direction, the brightness of the exit surface portion becomes high in the superimposed region, and the brightness of the exit surface portion in the non-superposed region. Is relatively low. If such uneven brightness occurs on the exit surface portion, the appearance of the lamp when it is lit deteriorates.

In the present invention, as shown in a schematic perspective view in FIG. 10B, a reflection step 218 that reflects light in a divergent state is formed on the boundary surface 217. As the reflection step 218, in this embodiment, the reflection step 218 is composed of a semi-cylindrical optical step in which the cross-sectional shape in the axial direction is projected downward in a semicircular shape and extends in the plate thickness direction of the edge light guide 21. ..

By providing the reflection step 218, the light projected on the inner surface of the boundary surface 217 is reflected by the reflection step 218 in a state of being diverged over a relatively wide angle range with respect to the optical axis direction, and is reflected in the edge light guide 21. Is guided. FIG. 10A shows an example of reflection on the lower boundary surface 217. Then, the light guided to the exit surface portion 213 is superimposed on the light guided from each reflection surface portion 212. As a result, these lights are equalized over the required region in the vertical direction of the emission surface portion 213, unevenness of brightness in the emission surface portion 213 is prevented, and the appearance of the edge lamp unit EgU at the time of lighting is deteriorated.

Further, by forming the reflection step 218 on the boundary surface 217, it is possible to reduce the light transmitted through the boundary surface 217 and leaked from the edge light guide 21, and the light is emitted from the white LED 20 (third light source L3). It is possible to improve the utilization efficiency of the light. The reflection step 218 may be a step of reflecting light in a divergent or diffused state. For example, it may be an optical step having a knurled structure.

The edge light guide 21 is supported by the lamp body 101 as described above, and in order to perform this support, the edge light guide 21 is provided with a support piece portion 214 extending further rearward from the rear end surface. .. The support piece portion 214 is extended and formed as a plate piece having a thickness substantially corresponding to the increased thickness dimension of the incident surface portion 211 that increases the thickness of the edge light guide 21. Further, the support piece portion 214 is bent toward the inner side surface in the optical axis direction at a required angle, for example, about 120 °, and a screw insertion hole 214a is opened in a part thereof in the plate thickness direction. Has been done.

On the other hand, a part of the lamp body 101 that supports the edge light guide 21 is configured as a fixed portion 101a to which the support piece portion 214 is brought into close contact. As shown in FIG. 7, when supporting the edge light guide 21, the fixing screw S is inserted into the screw insertion hole 214a and screwed into the fixing portion 101a of the lamp body 101 using a tool T such as a screwdriver. , To conclude.

At this time, since the support piece portion 214 is inclined with respect to the optical axis direction, the screwdriver T can be inserted through the notch portion of the B substrate 1B, and the fixing screw S can be easily fastened. .. Further, by providing the fixed portion 101a with a corner portion having the same angle as the bending angle of the support piece portion 214, the support piece portion 214 can be brought into close contact with the fixed portion 101a, and the edge light guide 21 can be held in a stable posture. Can be fixed.

On the other hand, since the support piece portion 214 is formed thinner than the other portions, it is suppressed that the light incident on the incident surface portion 211 is guided toward the support piece portion 214, and most of the incident light is suppressed. Is guided toward the reflective surface portion 212. Even if a part of the light is guided toward the support piece portion 214, since the support piece portion 214 is bent, it is reflected forward at this bent portion and directed toward the exit surface portion 213. As a result, the light utilization efficiency of the third light source L3 in the edge lamp unit EgU can be improved.

(Rod lamp unit RoU)
FIG. 11A is a perspective view showing a schematic configuration of the rod lamp unit RoU, and FIG. 11B is a sectional view taken along line bb thereof. The rod lamp unit RoU is composed of a fourth light source L4 and a rod light guide 31. The rod light guide 31 is configured as a light guide rod having a columnar shape made of a transparent resin material, and is extended in the left-right direction in a curved state along the upper edges of the low beam lamp unit LoU and the high beam lamp unit HiU. ing. Here, a concave groove 103a that opens forward in the front surface of the extension 103 is formed so as to extend in the left-right direction, and most of the rod light guide 31 is accommodated and supported by the concave groove 103a.

FIG. 12A is a schematic perspective view of one end of the rod light guide 31 in the length direction, and extends to the back surface side through the hole 103b provided in the extension 103. A C substrate 1C is supported by a holder 321 at one end thereof, and the fourth light source L4 is supported by the C substrate 1C. The holder 321 holds the rod light guide 31 by a holding piece 322 provided in a part thereof. Further, the rod light guide 31 is also supported by the lamp body 101 because it is fixed to the lamp body 101 by a screw or the like (not shown) using the screw insertion hole 323.

The C substrate 1C is supported by the holder 321 so as to face the end surface of one end of the rod light guide 31, and a white LED 30 is mounted on the facing surface as a fourth light source L4. Further, the C board 1C is electrically connected to the lamp ECU 5 by the connector 324. The white LED 30 causes the light emitted when it is emitted to be incident on one end face of the rod light guide 31.

One end surface of the rod light guide 31 is configured as an incident surface portion 311 on which the light of the white LED 30 as the fourth light source L4 is incident. Further, the peripheral surface region facing the rear side of the rod light guide 31, that is, the region extending in the longitudinal direction of the rod light guide along the inner bottom surface of the concave groove 103a, receives the light incident on the rod light guide 31. It is configured as a reflecting surface portion 312 that reflects on the inner surface. On the other hand, the peripheral surface region on the front side of the rod light guide 31 facing the rod light guide 31, that is, the peripheral surface region exposed from the opening of the concave groove 103a is configured as an exit surface portion 313 that emits the light reflected by the reflective surface portion 312. Has been done.

In the rod lamp unit RoU, the fourth light source L4, that is, the white LED 30, emits light, so that the light emitted from the white LED 30 is incident on the incident surface portion 311 of the rod light guide 31. The incident light is guided in the length direction while repeating internal reflection inside the rod light guide 31. Then, while being guided, the reflection surface portion 312 sequentially reflects the inner surface toward the front.

The reflecting surface portion 312 is formed of a plurality of reflecting elements formed at required intervals along the length direction of the rod light guide 31, as shown in FIG. 12B with a partial schematic cross section. .. That is, a plurality of V-grooves 314 are formed at required intervals from the peripheral surface on the rear side of the rod light guide 31 toward the front, whereby the trapezoidal reflection step 315 is formed between the V-grooves 314 adjacent in the length direction. Is configured. In this embodiment, the peripheral surface region on the rear side of the lot light guide 31 is formed in a flat surface shape extending in the tangential direction, and the reflection step 315 is formed by forming the V groove 314 in the flat surface portion. There is.

The light incident on the rod light guide 31 from the incident surface portion 311 and projected onto the inner surface of the reflecting surface portion 312 is reflected on the upper bottom surface of the trapezoidal reflection step 315 and both slopes sandwiching the trapezoidal reflection step 315. Most of the reflected light is incident on the peripheral surface region on the front side of the rod light guide 31, that is, the exit surface portion 313, and is emitted from here toward the front. Further, a part of the light reflected by the reflecting surface portion 312 is directed to the peripheral surface region on the upper side or the lower side of the rod light guide 31, is internally reflected in these regions, and is emitted from the exit surface portion 313.

As shown in FIG. 11B, some light may leak to the outside from the rod light guide 31, but these lights are reflected on the inner surface of the concave groove 103a of the extension 103 and the rod is again rode. It is incident on the light guide, and as a result, it is emitted from the exit surface portion 313. Alternatively, it is reflected on the inner surface of the concave groove 103a and is emitted forward as it is. Therefore, most of the light guided by the rod light guide 31 is emitted toward the front, and the utilization efficiency of the light of the fourth light source L4 is improved.

Here, by appropriately setting the angle of the V-groove 314, the incident angle of light when reflected on the upper bottom surface and both slopes of the trapezoidal reflection step 315 is as large as possible, particularly from the critical angle. Can be configured to have a large angle. As a result, the light leaking from the rod light guide 31 to the outside in the reflecting surface portion 312 can be reduced, the light reflection efficiency in the reflecting surface portion 312 is enhanced, and the utilization efficiency of the light emitted from the emitting surface portion 313 is improved. Can be enhanced. Further, the light guiding efficiency of the light guided by the rod light guide 31 in the length direction is enhanced, and uniform light emission can be performed over a wide area of the rod light guide 31 in the length direction.

In the rod lamp unit RoU and the edge lamp unit EgU described above, as a basic lighting mode, when the lamp lighting switch SW1 is turned on, the third light source L3 and the fourth light source L4 are simultaneously controlled to emit light. It will be lit as a lamp having the same function, that is, a lamp having the same function, in which an inverted L-shaped region connecting both emission surface portions 213 and 313 of the edge light guide 21 and the rod light guide 31 is used as a light emitting surface. ..

At this time, when the function changeover switch SW3 is switched to the clearance lamp, as shown in the schematic diagram in FIG. 13A, the required brightness is obtained from each emission surface portion of the edge light guide 21 and the rod light guide 31. White light is emitted, and the lamp units RoU and EgU are turned on. In FIG. 13, for convenience, the darkness of the fill indicates the brightness. Therefore, when the headlamp HL (L-HL) is visually recognized from the front side, the clearance lamp has an inverted L-shaped region as a light emitting surface in which both exit surface portions 213 and 313 of the edge light guide 21 and the rod light guide 31 are connected. It becomes a lighting state that functions as.

That is, since the light emitting surface extending vertically having a relatively large width dimension of the edge lamp unit EgU and the light emitting surface extending horizontally having a relatively small width dimension of the rod lamp unit RoU are combined, only the edge lamp unit or the rod Compared to a lamp in which only a lamp unit is combined, a lamp having a complicated shape of a light emitting surface and having a high design effect is configured.

Further, when the function changeover switch SW3 is operated to switch to the daytime running lamp, the luminosity of the third light source L3 and the fourth light source L4 is controlled to a higher luminosity. As a result, the edge lamp unit 21 and the rod lamp unit 31 are lit in a brighter state than in the clearance lamp, and are in a lit state that functions as a daytime running lamp.

In this lighting mode, it is preferable that the brightness of each light emitting surface of the edge lamp unit EgU and the rod lamp unit RoL is equal. In this case, for example, the edge light guide 21 and the rod light guide 31 are designed so that the amount of emitted light per unit area of each of the emitting surface portions 213 and 313 is equal. In the above-described embodiment, the third light source L3 of the edge lamp unit EgU is composed of three white LEDs 20, and the fourth light source L4 of the rod lamp unit RoU is composed of one white LED 30. Assuming that the amount of emitted light of each of the white LEDs 20 and 30 is the same, the area of the exit surface portion 213 of the edge light guide 21 is designed to be three times the area of the exit surface portion 313 of the rod light guide 31. To do.

Further, as shown in FIG. 3, since the lamp ECU 5 includes a luminous intensity adjusting unit 52 for adjusting the luminous intensity of the third light source L3 and the fourth light source L4, the edge lamp unit EgU and the rod lamp unit RoU are used. While checking the brightness of each light emitting surface of both lamp units EgU and RoU in the state of emitting light, the luminous intensity adjusting unit 52 adjusts the current supplied to each light source L3 and L4 to adjust the respective luminous intensity. It may be.

For example, as shown in FIG. 13B, when the edge lamp unit EgU and the rod lamp unit RoL are lit as a clearance lamp by the function changeover switch SW3, the third light source L3 emits light at a predetermined luminous intensity. The fourth light source L4 may emit light at a luminous intensity lower than a predetermined luminous intensity. In this case, the edge lamp unit EgU is lit brightly, and the rod lamp unit RoU is lit with a lower brightness. When the daytime running lamp is lit, the third light source L3 and the fourth light source L4 may be emitted with the same luminous intensity so that both the edge lamp unit EgU and the rod lamp unit RoU are lit with the same brightness. ..

On the contrary, as shown in FIG. 13C, when the clearance lamp is lit, the fourth light source L4 emits light at a predetermined luminous intensity, and the luminous intensity of the third light source L3 is lowered. As a result, the brightness of the rod lamp unit RoU when lit becomes brighter than the brightness of the edge lamp unit EgU. When the daytime running lamp is lit, it is the same that the third light source L3 and the fourth light source L4 are emitted with the same luminous intensity to light both the edge lamp unit EgU and the rod lamp unit RoU.

Alternatively, depending on the situation, when the clearance lamp is lit, only one of the edge lamp unit EgU and the rod lamp unit RoU, for example, the rod lamp unit RoU is lit, and when the daytime running lamp is lit, the other, for example, only the edge lamp unit EgU is lit. It may be turned on. Alternatively, it may be in a form of lighting in the opposite form to this.

In the case where the edge lamp unit EgU and the rod lamp unit RoU are selectively lit in this way, the edge lamp unit EgU and the rod lamp unit RoU may be adjusted to the same luminous intensity in the luminous intensity adjusting unit 52. The luminosity of the edge lamp unit EgU and the rod lamp unit RoU may be adjusted to a luminosity higher than a predetermined luminosity. That is, each lamp unit is adjusted so as to have a brightness that satisfies the brightness required for the clearance lamp or the daytime running lamp even by itself.

The rod light guide 31 is gradually attenuated when light is guided toward the end on the opposite side from the incident surface portion 311, here, toward the inner end in the vehicle width direction, and the brightness in the length direction is increased. It is possible that unevenness will occur. As a countermeasure, for example, it is conceivable to gradually increase the size of the reflection step 315 from the incident surface portion to the opposite end portion. That is, by gradually increasing the distance dimension in the length direction of the V-groove 314, the reflection efficiency can be increased toward the opposite end of the rod light guide 31 and the attenuation can be offset.

Alternatively, the end surface of the opposite end of the rod light guide 31 is also configured as an incident surface portion, another fourth light source is arranged facing the incident surface portion on the opposite side, and light is incident from both ends of the rod light guide. Let me do it. Since the light incident from both ends of the rod light guide is superimposed on each other, reflected, and emitted, it is possible to make the brightness uniform in the length direction.

Further, when the rod lamp unit RoU is arranged in the lamp housing 100, if the incident surface portion 311 of the rod light guide 31 is arranged close to the B substrate 1B, the incident surface portion 311 is placed on the B substrate 1B. The white LED 30 as the fourth light source L4 may be mounted on a part of the B substrate 1B by arranging them so as to face each other. By doing so, the above-mentioned C substrate 1C can be omitted. Alternatively, the incident surface portion 311 may be arranged so as to face the A substrate 1A, and the white LED 30 as the fourth light source L4 may be mounted on a part of the A substrate 1A.

Here, the arrangement of the edge lamp unit EgU and the rod lamp unit RoU can be changed as appropriate. In the embodiment, the edge lamp unit EgU and the rod lamp unit RpU are arranged over the lateral region and the upper region around the low beam lamp unit LoU and the high beam lamp unit HiU, but are not limited to these regions. .. Further, the light emitting surfaces of both lamp units EgU and RoU, that is, the light guides 21 and 31 may be arranged in a form connected in the circumferential direction.

Further, at least one form of the edge lamp unit EgU and the rod lamp unit RoU may be appropriately changed. For example, at least one of the lamp units may be composed of a plurality of lamp units. The same applies to the number of light guides in each lamp unit. For example, the rod lamp unit RoU may be configured as a lamp unit in which a plurality of rod light guides 31 are arranged in parallel or in series.

In this way, the edge lamp unit EgU and the rod lamp unit RoU are arranged in the composite headlamp HL, and these lamp units EgU and RoU are lit as lamps having the same function or lamps having different functions. Compared with the case where only the edge lamp unit is combined or the case where only the rod lamp unit is combined, the design effect at the time of lighting is enhanced.

(Side lamp unit SiU)
FIG. 14 is an exploded perspective view of the side lamp unit SiU. Further, FIG. 7 shows a cross-sectional configuration of the side lamp unit SiU. The side lamp unit SiU is configured as a side marker lamp unit or a turn signal lamp unit, but here, it is configured as a turn signal lamp unit. This turn signal lamp unit includes a fifth light source L5 and a lens unit 41.

The fifth light source L5 is the outer surface of the B substrate 1B on which the third light source L3 of the edge lamp unit EgU is mounted, that is, the side opposite to the surface on which the third light source L3 is mounted. It is composed of an LED 40 that emits white light or amber color light mounted on the surface of the above surface. Here, it is configured as a white LED 40, and the light emission is controlled independently of the third light source L3, and when the light is emitted, the white light is emitted toward the outside in the vehicle width direction.

Further, the position where the white LED 40 as the fifth light source L5 is mounted on the B substrate 1B is set to a position different from the position where the white LED 20 is mounted on the third light source L3. That is, the white LEDs 40 and 20 are mounted so as not to be back to back with each other. In this case, it is preferable that the two white LEDs 40 and 20 are mounted at positions separated from each other, and more preferably at a position as far as possible from the incident surface portion 211 and the reflecting surface portion 212 of the edge light guide 21. As a result, when the white LEDs 40 and 20 emit light at the same time, heat generation is suppressed from being concentrated in a part of the B substrate 1B, that is, a portion where both white LEDs 40 and 20 are mounted, and the reliability of the light source is improved. Further, the influence of heat on the edge light guide 21 when the fifth light source L5, that is, the white LED 40 emits light can be suppressed.

The lens portion 41 is formed of an amber-colored translucent resin and has a translucent portion 411 having a curved surface shape that is convex toward the front, and the peripheral edge of the translucent portion 411 is not black or the like. A frame portion 412 in which a translucent resin is integrally molded is formed. The translucent portion 411 and the frame portion 412 are formed by, for example, two-color molding. The lens portion 41 is arranged along the inner surface of the translucent cover 102 in a state of extending from the front of the automobile to the outer region in the vehicle width direction, and although not shown in the drawing, the lamp in the frame portion 411. It is supported by the body 101. Further, by this arrangement, the non-translucent frame portion 412 prevents the B substrate 1B from being exposed to the outside through the translucent cover 102. Further, the frame portion 412 is formed with an eaves-shaped shade portion 414 protruding inward at a portion along the peripheral edge of the translucent portion 411.

At least the translucent portion 411 of the lens portion 41 is arranged to face the white LED 40 as the fifth light source L5, and the light emitted when the white LED 40 emits light is transmitted through the translucent portion 411 and is in front of the automobile. Or it is emitted toward the left. A required optical step 413 is formed on the inner surface of the translucent portion 411, and the white light transmitted through the translucent portion 411 is refracted by the optical step 413, and at the same time, the white light is directed as amber colored light toward the required region described above. And emit. The white LED 40 blinks when the turn switch SW4 shown in FIG. 3 is operated. As a result, amber colored light is emitted from the translucent unit 411 toward the front or left side of the automobile in a blinking state, and functions as a turn signal lamp.

At this time, since the B substrate 1B extends along the side surface of the adjacent edge lamp unit EgU, the light of the fifth light source L5, that is, the white LED 40 is blocked by the B substrate 1B and becomes the edge light guide 21. Leakage is prevented. Further, the shade portion 414 formed in the frame portion 412 blocks the light of the white LED 40 reflected by the translucent portion 411 or the external light transmitted through the translucent portion 411 and leaks to the edge light guide 21. It is prevented from getting in. This prevents problems such as pseudo-lighting of the edge lamp unit EgU.

As described above, the white LED 40 as the fifth light source L5 is mounted on the B substrate 1B on which the third light source L3 is mounted, and the B substrate 1B is shared by the third light source L3 and the fifth light source L5. There is. This eliminates the need for an independent substrate at least for the fifth light source L5, and makes it possible to reduce the number of parts of the side lamp unit SiU and the entire headlamp HL, and to reduce the size.

That is, the edge lamp unit EgU is composed of a light guide type lamp unit provided with a light guide 21, and this light guide type lamp unit is designed when arranging a light source by appropriately designing the shape of the light guide 21. The degree of freedom is high. Therefore, even if the side lamp unit SiU arranged adjacent to the edge lamp unit EgU is composed of the lens type lamp unit, it becomes easy to make the arrangement of the light source correspond to the side lamp unit SiU. As a result, the third light source L3 of the edge lamp unit EgU and the B substrate 1B on which the fifth light source L5 of the side lamp unit SiU is mounted can be shared.

Further, when a light emitting circuit for causing the third light source L3 to emit light is formed on the B substrate 1B, the fifth light source L5 can be made to emit light by using this light emitting circuit. In this case, the light emitting circuit of the fifth light source L5 may be configured by a part of the light emitting circuit of the third light source L3. Further, a connector 222 for connecting the third light source to the lamp ECU 5 is connected to the B board, and the fifth light source L5 can be connected to the lamp ECU 5 by using this connector 222, which is an independent connector. Is no longer needed.

Further, when the edge lamp unit EgU is assembled in the lamp housing 100 when assembling the headlamp HL, the fifth light source L5 of the side lamp unit SiU is assembled at the same time. Therefore, the assembly of the side lamp unit SiU is completed only by assembling the lens portion 41 to the lamp body 101, and the assembly work of the headlamp HL can be simplified and speeded up.

The B substrate 1B is supported substantially in parallel along the outer surface of the edge light guide 21. Further, the optical axis of the edge light guide 21 is directed in the front-rear direction of the headlamp HL. Therefore, when the white LEDs 20 and 40 of the third light source L3 and the fifth light source L5 mounted on the B substrate 1B are composed of chip-type LEDs, if these chip-type LEDs are flip-chip mounted on each surface of the B substrate 1B. , The light emitting surface of each chip type LED is directed to the inside or the outside in the vehicle width direction. As a result, the light of the fifth light source L5 is emitted toward the side in the vehicle width direction, and the lens required to satisfy the light distribution as a turn signal lamp that irradiates through the lens unit 41. The design of step 413 is facilitated.

Since the B substrate 1B is integrally supported by the edge light guide 21, the heat generated when the white LEDs 20 and 40 of the third light source L3 and the fifth light source L4 emit light is transferred to the B substrate 1B, respectively. Further, heat can be transferred to the lamp body 101 supporting the edge light guide 21 to dissipate heat from the lamp body 101, and the luminous efficiency and reliability of these white LEDs 20 and 40 can be improved.

The side lamp unit SiU is arranged in the wraparound portion of the headlamp HL, and the lens portion 41 does not exist at a position in front of the exit surface portion 213 of the edge light guide 21. That is, it does not exist in at least the front region and the side region of the exit surface portion 213 which is inclined toward the outside in the vehicle width direction. Therefore, the light emitted from the exit surface portion 213 of the edge light guide 21 toward the front or side region is not blocked by the side lamp unit SiU, particularly the lens portion 41. Further, the light emitted from the side emission step 216 of the edge light guide 21 toward the side region is not blocked, and the light distribution of the edge lamp unit EgU is not hindered.

The side lamp unit SiU may be composed of a reflector type lamp unit. In this case, a reflector may be arranged in the vicinity of the B substrate 1B so as to reflect the light emitted from the fifth light source L5 and irradiate it with a required light distribution. Further, the fifth light source L5 may be composed of an LED that emits a predetermined color light. Even if the reflector type lamp unit is configured in this way, the substrate on which the fifth light source L5 is mounted can be shared by the B substrate 1B on which the third light source L3 of the edge lamp unit EgU is mounted.

The present invention is not limited to the configuration of the embodiment described above, and various modifications are possible. For example, in the low beam lamp unit and the high beam lamp unit, the number of white LEDs as the first light source and the second light source and the configuration of the reflector can be appropriately changed. Further, these lamp units may be configured as a lens type lamp unit, particularly a projector type lamp unit.

In the edge lamp unit, the configuration of the edge lamp guide, particularly the number of white LEDs as the third light source and the corresponding number of reflecting surface portions provided on the edge light guide can be appropriately increased or decreased. Further, the auxiliary reflection step formed on the boundary surface of the adjacent reflection surface portion is not limited to the knurling, and may be an optical step capable of appropriately reflecting light in a divergent or diffused state.

In the rod lamp unit, the cross-sectional shape of the rod light guide and the shape when viewed from the front surface can be appropriately changed, and the configuration of the reflective surface portion may be different depending on the shape and size of the rod light guide. For example, a light reflecting film may be formed on the reflecting surface portion.

In the above embodiment, the edge lamp unit and the rod lamp unit are configured as a clearance lamp and a daytime running lamp, but may be configured as other auxiliary lighting lamps or sign lamps. Further, although the side lamp unit is configured as a turn signal lamp, it may be configured as a side marker lamp, or another sign lamp or auxiliary lighting lamp as described above.

L1 to L5 1st to 5th light sources HL (R-HL, L-HL) Headlamp LoU Low beam lamp unit (reflector type lamp unit)
HiU high beam lamp unit (reflector type lamp unit)
EgU edge lamp unit (light guide type lamp unit)
RoU rod lamp unit (light guide type lamp unit)
SiU side lamp unit (lens type lamp unit)
1A, 1B, 1C A to C boards 10, 20, 30, 40 LEDs (white LEDs)
11,12 Reflector 21 Edge light guide 31 Rod light guide 41 Lens part 211 Incident surface part 212 Reflection surface part 213 Exit surface part 214 Support piece part 215 Refraction step 216 Side reflection step 217 Boundary surface 218 Reflection step

Claims (9)

A vehicle lamp including a light source and a light guide body that guides and emits light incident from the light source. The light guide body has an incident surface portion on which the light of the light source is incident and a light guide. It is provided with an exit surface portion that emits the emitted light and a reflection surface portion that internally reflects the light incident from the incident surface portion toward the emission surface portion, and the reflection surface portion is composed of a plurality of adjacent reflection surface portions. A vehicle lamp characterized by having a reflection step that internally reflects light in a state of diverging or diffusing light on the boundary surface of a plurality of reflecting surface portions. The vehicle lamp according to claim 1, wherein the reflection step has a configuration in which a plurality of semi-cylindrical optical steps are arranged. The exit surface portion is configured as an inclined surface, and the plurality of reflecting surface portions are arranged in a stepped manner along the inclined direction of the emitting surface portion, and a boundary surface extending in a direction intersecting the inclined direction between adjacent reflecting surface portions. The vehicle lamp according to claim 2, wherein the lamp is formed. The light guide body is composed of a translucent plate-shaped member, the incident surface portion is formed on a part of one plate surface of the plate-shaped member, and the incident surface portion of the other plate surface of the plate-shaped member is formed. The vehicle lamp according to any one of claims 1 to 3, wherein a reflective surface portion is formed on a facing portion and the reflective surface portion is formed on an end surface of the plate-shaped member. A claim that includes a substrate supported along the one plate surface of the light guide, and the light source is composed of a plurality of light sources mounted at positions facing the plurality of incident surface portions of the substrate. The vehicle lamp according to 4. The fourth or fifth aspect of the present invention, wherein the reflecting surface portion includes a single reflecting surface that directs the incident light toward the emitting surface portion by one internal reflection, and a double reflecting surface that directs the incident light toward the emitting surface portion by a plurality of internal reflections. Vehicle lamp. The vehicle according to any one of claims 4 to 6, wherein the exit surface portion includes a side emission step that reflects light guided to the edge portion in the plate thickness direction and emits light in the plate thickness direction. Lamp for. The vehicle lamp according to claim 7, wherein the exit surface portion is inclined in the plate thickness direction from the one edge portion on which the side emission step is formed toward the other edge portion. The light guide body includes a support piece portion that extends from the reflection surface portion in the direction opposite to the exit surface portion and is bent in the plate thickness direction in a part thereof, and a fixing portion of a vehicle lamp is provided in the support piece portion. The vehicle lamp according to any one of claims 4 to 8 supported by the above.

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