JP2020004483A - Vehicular lighting fixture - Google Patents

Abstract

To improve utilization efficiency of a light in a vehicular lighting fixture.SOLUTION: A vehicular lighting fixture includes: a light source 6; a rod-like first light guide part 10 having an emission surface 14 long in a first direction that emits a light from the light emission surface 14 while guiding the light of the light source 6 inside; and a second light guide part 12 having an incident surface 20 for the light of the light source 6 that guides the light of the light source 6 to the first light guide part 10 while guiding it inside. The second light guide part 12 includes a conversion part 22 for converting a light incident from the incident surface 20 to a parallel light.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp used for a vehicle such as an automobile.

  2. Description of the Related Art Conventionally, there has been known a vehicular lamp that emits light from a light source to the front of the lamp via a light guide. For example, in Patent Literature 1, the light guide has a rod-shaped portion and a plurality of light-entering portions branched from the peripheral surface of the rod-shaped portion, and light incident from the light-entering portion is provided on the peripheral surface of the rod-shaped portion. A structure for emitting light forward of the lamp by steps is disclosed.

JP-A-2006-212988

  The present inventors have conducted intensive studies on a vehicular lamp having a light guide in which a light incident portion is connected to the peripheral surface of a rod-shaped portion. I found that there is.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a technique for improving light use efficiency in a vehicle lamp.

  In order to solve the above-described problems, one embodiment of the present invention is a vehicular lamp. The vehicular lamp has a light source, a rod-shaped first light guide that has a light exit surface that is long in a first direction, and emits light from the light exit surface while guiding light from the light source inside, and light from the light source. And a second light guide section for guiding the light of the light source to the first light guide section while guiding the light inside. The second light guide has a conversion unit that converts light incident from the incident surface into parallel light. According to this aspect, the light use efficiency of the vehicle lamp can be improved.

  Another embodiment of the present invention is also a vehicular lamp. The vehicular lamp has a light source, a rod-shaped first light guide that has a long exit surface in a first direction, emits light from the exit surface while guiding the light of the light source inside, and a light source of the light source. A second light guide section having an incident surface and guiding the light of the light source to the first light guide section while guiding the light inside. The second light guide has a parabolic reflection surface that reflects light incident from the incident surface. According to this aspect as well, the light use efficiency of the vehicle lamp can be improved.

  In the above aspect, the light source may be arranged such that the light emitting surface includes the focal point of the parabolic reflection surface. Further, in the above aspect, the second light guide is connected to a back surface of the first light guide that faces away from the emission surface, and the back surface is configured to emit light in the first light guide from the emission surface. The first light guide may have a structure, and the first light guide may have a reflection surface on the emission surface side that totally reflects light incident from the second light guide on the inner surface. Further, in any of the above aspects, the second light guide may be arranged in an intermediate region of the first light guide in the first direction. In any of the above aspects, the vehicular lamp may include a plurality of second light guides, and the plurality of second light guides may be arranged at predetermined intervals in the first direction. Further, in any of the above aspects, the vehicular lamp has a rod-shaped third light guide extending along the first light guide, and the second light guide is connected to the third light guide, and May be incident on the first light guide from the second light guide via the third light guide.

  ADVANTAGE OF THE INVENTION According to this invention, the utilization efficiency of light in a vehicle lamp can be improved.

FIG. 1 is a front view showing a schematic structure of a vehicle lamp according to a first embodiment. It is a top view which shows schematic structure of a light guide and a light source. It is a top view which expands and shows a part of light guide. FIG. 4A is a schematic diagram of a cross-sectional shape of the light guide taken along line AA in FIG. FIG. 4B is a schematic diagram of a part of a cross-sectional shape of the light guide taken along line BB in FIG. 4A. FIG. 11 is a vertical sectional view showing a schematic structure of a part of a vehicle lamp according to a second embodiment.

  Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The embodiments are illustrative and do not limit the invention, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention. The same or equivalent components, members, and processes shown in each drawing are denoted by the same reference numerals, and the repeated description will be omitted as appropriate. Further, the scale and shape of each part shown in each drawing are set for the sake of convenience for ease of explanation, and are not to be construed as limiting unless otherwise specified. In addition, when terms such as “first” and “second” are used in the present specification or the claims, the terms do not indicate any order or importance unless otherwise specified, and a certain configuration may be used. This is for distinguishing the configuration from other configurations. In each drawing, some members that are not important for describing the embodiments are omitted.

(Embodiment 1)
FIG. 1 is a front view showing a schematic structure of the vehicular lamp according to the first embodiment. FIG. 2 is a plan view showing a schematic structure of the light guide and the light source. The vehicular lamp 1 according to the present embodiment is a vehicular headlamp device having a pair of headlamp units arranged, for example, on the left and right in front of the vehicle. Since the pair of headlight units has a substantially symmetrical structure and substantially the same configuration, FIG. 1 shows the structure of one headlight unit as the vehicle lamp 1.

  The vehicular lamp 1 (1A) includes a lamp body 2 having an opening on the front side of the vehicle, and a translucent outer cover 4 that covers the opening of the lamp body 2. A plurality of light sources 6 and a light guide 8 are accommodated in a lamp room formed by the lamp body 2 and the outer cover 4.

  The light source 6 is composed of, for example, an LED (light emitting diode). The light source 6 may be another semiconductor light emitting element such as an LD (laser diode), an organic or inorganic EL (electroluminescence), an incandescent bulb, a halogen lamp, a discharge bulb, or the like. A substrate (not shown) on which the light source 6 is mounted is fixed to, for example, the lamp body 2.

  The light guide 8 is a light-transmitting member that is long in any first direction. In the present embodiment, the light guide 8 extends approximately in the vehicle width direction. The light guide 8 is fixed to the lamp body 2 via a support member (not shown). For example, the light guide 8 is formed of a translucent resin material such as an acrylic resin or a polycarbonate resin.

  The light guide 8 has a first light guide 10 and a second light guide 12. The first light guide 10 is a rod-shaped translucent member and extends in the first direction. The peripheral surface of the first light guide 10 facing the lamp front side constitutes an emission surface 14 from which the light of the light source 6 is emitted. The peripheral surface is a surface that extends along the stretching axis (center axis in the stretching direction) of the rod-shaped member. That is, the first light guide unit 10 has the emission surface 14 that is long in the first direction. The first light guide unit 10 emits light from the emission surface 14 while guiding the light of the light source 6 inside. The emission surface 14 is visually recognized as a light emitting unit from outside the lamp.

  The second light guide 12 is a translucent member that is interposed between the light source 6 and the first light guide 10 and guides the light of the light source 6 to the first light guide 10 while guiding the light inside. . The second light guide unit 12 of the present embodiment is connected to the back surface 16 of the first light guide unit 10 that faces away from the emission surface 14. Further, the second light guide section 12 of the present embodiment is disposed in an intermediate region of the first light guide section 10 in the first direction. More specifically, the light guide 8 has a plurality of second light guides. FIG. 2 illustrates two second light guide portions 12a and 12b. The plurality of second light guide sections 12a and 12b are arranged in the intermediate area of the first light guide section 10 at predetermined intervals in the first direction.

  In the vicinity of the second light guide 12a, a light source 6a for causing light to enter the second light guide 12a is arranged. Similarly, a light source 6b for causing light to enter the second light guide 12b is disposed near the second light guide 12b. Light from the light source 6a is incident on the first light guide 10 via the second light guide 12a, and light from the light source 6b is incident on the first light guide 10 via the second light guide 12b. Is done.

  In addition, a light source 6c is arranged near one end face 18 of the first light guide unit 10. The end face is a surface extending in a direction intersecting with the stretching axis at the end of the rod-shaped member. The light source 6c is arranged so that its light emitting surface faces the end face 18 of the first light guide unit 10. Therefore, the light from the light source 6c is directly incident on the first light guide 10 from the end face 18. The light source 6 is not arranged near the other end face 19 of the first light guide 10. In the present embodiment, end face 18 is located on the outside in the vehicle width direction, and end face 19 is located on the inside in the vehicle width direction.

  Hereinafter, the shape of the light guide 8 will be described in more detail. FIG. 3 is an enlarged plan view showing a part of the light guide. FIG. 4A is a schematic diagram of a cross-sectional shape of the light guide taken along line AA in FIG. FIG. 4B is a schematic diagram of a part of a cross-sectional shape of the light guide taken along line BB in FIG. 4A. Hereinafter, the structure of the second light guide unit 12 will be described using the second light guide unit 12a as an example. The structure of the second light guide 12b is substantially the same as that of the second light guide 12a.

  The second light guide 12 has an incident surface 20 and a converter 22. The incident surface 20 is disposed on one end side of the second light guide 12 and faces the light emitting surface 24 of the light source 6. Therefore, the light of the light source 6 enters the second light guide 12 from the incident surface 20. The entrance surface 20 of the present embodiment is disposed at the end on the rear side of the lamp. The direction in which the light source 6 and the incident surface 20 are arranged is a direction crossing the direction in which the first light guide 10 and the second light guide 12 are arranged in the lamp front-rear direction.

  The conversion unit 22 is an optical element that converts light incident from the incident surface 20 into parallel light. The conversion unit 22 according to the present embodiment converts light that has entered the second light guide unit 12 from the incident surface 20 into parallel light traveling toward the first light guide unit 10. More specifically, the conversion unit 22 is configured by a parabolic reflection surface that reflects light incident from the incident surface 20 toward the first light guide unit 10. The conversion unit 22 is disposed in a region of the surface of the second light guide unit 12 that faces away from the incident surface 20 in a direction in which the light source 6 and the incident surface 20 are arranged. Further, the light source 6 is arranged such that the light emitting surface 24 includes the focal point F of the parabolic reflection surface. Preferably, the focal point F is a virtual focal point defined by the parabolic reflection surface, the refractive index of the second light guide 12, and the refractive index of air. The refractive index of the second light guide 12 is larger than the refractive index of air. For this reason, light incident on the second light guide section 12 from the incident surface 20 is refracted, and a shift occurs in the light path. The position of the virtual focal point is obtained by correcting the position of the focal point according to the shape of the parabolic reflection surface in consideration of the deviation. In FIG. 4A, the position of the focal point F, that is, the position of the virtual focal point is a position shifted upward in the drawing from the position of the focal point according to the shape of the parabolic reflection surface.

  The light of the light source 6 that has entered the second light guide unit 12 from the incident surface 20 is reflected by the conversion unit 22 formed of a parabolic reflection surface. Thereby, the light from the light source 6 is converted into parallel light traveling toward the first light guide 10. The parallel light travels inside the second light guide 12 toward the first light guide 10. The parallel light travels in parallel with the extending direction of two planes (the upper surface and the lower surface in the present embodiment) connecting the end on the incident surface 20 side and the end on the opposite side. The second light guide 12 has an end opposite to the incident surface 20 side connected to the back surface 16 of the first light guide 10. That is, the second light guide unit 12 has a structure in which the second light guide unit 12 protrudes from the back surface 16 of the first light guide unit 10 and the incident surface 20 and the conversion unit 22 are disposed at the tip.

  The conversion unit 22 is designed so that the angle between the traveling direction of the parallel light reflected toward the first light guide unit 10 and the extending direction of the first light guide unit 10 is an acute angle. The conversion section 22 of the present embodiment is designed so that the parallel light approaches the end face 19 of the first light guide section 10 as the parallel light approaches the first light guide section 10, in other words, toward the inside in the vehicle width direction.

  The light in the second light guide 12 is incident on the first light guide 10 from the back surface 16. The parallel light that has entered the first light guide 10 from the second light guide 12 repeats internal reflection on the peripheral surface of the first light guide 10, and travels inside the first light guide 10 toward the end face 19. Go. The back surface 16 of the first light guide 10 has an optical structure 26 for emitting light in the first light guide 10 from the emission surface 14. In the present embodiment, the optical structure 26 is composed of a plurality of reflection steps. The reflection step is arranged in a region of the back surface 16 except for a region to which the second light guide unit 12 is connected. A part of the light that travels while being internally reflected inside the first light guide 10 is reflected by the optical structure 26. The light reflected by the optical structure 26 is emitted from the emission surface 14 to outside the first light guide 10.

  A region of the peripheral surface of the first light guide unit 10 on the front side of the lamp, which intersects with the traveling direction of the parallel light from the conversion unit 22 to the first light guide unit 10, is incident from the second light guide unit 12 and has an optical structure. It functions as a reflecting surface 28 that totally reflects the parallel light that has arrived directly without passing through the inner surface. That is, the first light guide unit 10 has the reflection surface 28 on the side of the emission surface 14 that totally reflects the light incident from the second light guide unit 12 on the inner surface. Further, the region functions as an emission surface 14 for emitting the light reflected by the optical structure 26 and arriving outside the first light guide unit 10. For example, the reflection surface 28 corresponding to the second light guide portion 12a functions as the emission surface 14 for the light of the light source 6c incident from the end surface 18, and the reflection surface 28 corresponding to the second light guide portion 12b is It functions as an emission surface 14 for the light of the light source 6a incident from the second light guide 12a.

  The conversion unit 22 is arranged such that the angle between the parallel light and the reflection surface 28 is an angle at which the parallel light is totally reflected by the reflection surface 28. Thereby, the reflection surface 28 can totally reflect the parallel light incident from the second light guide portion 12 toward the back surface 16 side. A part of the light reflected by the reflecting surface 28 goes directly to the optical structure 26, is reflected by the optical structure 26, and is emitted from the emission surface 14. Another part of the light reflected by the reflection surface 28 is reflected by the optical structure 26 after being internally reflected by the peripheral surface of the first light guide 10, and is emitted from the emission surface 14.

  The light guide 8 of the present embodiment has the protrusion 30. The protruding portion 30 is a plate-shaped translucent member that protrudes from the back surface 16 of the first light guide unit 10 to the rear side of the lamp and spreads in the first direction along the back surface 16. The protrusion 30 extends from the second light guide 12a to the second light guide 12b. Further, the protruding portion 30 also extends to a region from the end surface 18 to the second light guide portion 12a and a region from the second light guide portion 12b to the vicinity of the end surface 19 (see FIG. 2).

  Part of the light that travels while repeating internal reflection in the first light guide 10 may enter the projection 30 from the rear surface 16. The end face of the protruding portion 30 facing the rear side of the lamp is positioned with respect to the first light guide portion 10 so that light incident into the protruding portion 30 from the back surface 16 is reflected by the end face and returns to the first light guide portion 10 side. An angle is defined. Thus, light that has entered the protruding portion 30 from the back surface 16 can be emitted from the emission surface 14. Therefore, light use efficiency can be improved. In the present embodiment, the first light guide 10, the second light guide 12, and the protrusion 30 are integrally formed products.

  The vehicle lamp 1 can function as a marker lamp such as a turn signal lamp, a daytime running lamp, and a clearance lamp by emitting light from the emission surface 14 of the first light guide unit 10. By simultaneously emitting light from the light sources 6a to 6c, a long light emitting surface in the first direction can be formed. Further, by sequentially turning on the light sources 6a to 6c, so-called sequential light emission can be realized. For example, by turning on the light source 6b, the light source 6a, and the light source 6c in this order, sequential light emission extending from the inside to the outside in the vehicle width direction can be realized. Note that the vehicular lamp 1 can also be used as a headlamp. Further, the vehicular lamp 1 can be arranged as a tail lamp, a brake lamp, or the like, which is disposed behind the vehicle.

  As described above, the vehicular lamp 1 according to the present embodiment has the light source 6 and the emission surface 14 long in the first direction, and the light from the emission surface 14 is guided while the light of the light source 6 is guided inside. And a second light guide section 12 that guides the light of the light source 6 to the first light guide section 10 while guiding the light of the light source 6 therein. And The second light guide unit 12 includes a conversion unit 22 that converts light incident on the first light guide unit 10 from the incident surface 20 into parallel light. Alternatively, the second light guide section 12 has a parabolic reflection surface that reflects light incident from the incident surface 20.

  Further, the second light guide section 12 is connected to a back surface 16 facing the emission surface 14 of the first light guide section 10, and the back surface 16 emits light in the first light guide section 10 from the emission surface 14. Optical structure 26 for And the 1st light guide part 10 has the reflection surface 28 which totally reflects the parallel light which injects from the 2nd light guide part 12 in an inner surface at the emission surface 14 side.

  The light incident on the second light guide unit 12 is converted into parallel light by the conversion unit 22 and guided to the first light guide unit 10, so that light is guided on the inner wall surface of the second light guide unit 12 during light guide. Reflection can be suppressed. For this reason, light enters the first light guide 10 from the second light guide 12 at an unintended incident angle, that is, light is reflected on the reflection surface 28 at an angle that cannot be totally reflected by the reflection surface 28 of the first light guide 10. Can be suppressed. Further, light leakage from the second light guide unit 12 can also be suppressed. Accordingly, the amount of light emitted from the emission surface 14 can be increased, and the light use efficiency can be improved.

  In addition, it is possible to prevent the light that has reached the first light guide unit 10 from being emitted in an unintended direction, for example, to suppress the light from being directly emitted from the reflection surface 28 that is an extension of the second light guide unit 12. it can. This suppresses a phenomenon that a part of the light exit surface 14 appears to be brighter than other areas, and the uniformity of light emission of the light guide 8 can be improved.

  Further, in the present embodiment, the light source 6 is arranged such that the light emitting surface 24 includes the focal point F of the parabolic reflection surface constituting the conversion unit 22. Thereby, more light incident on the second light guide unit 12 can be converted into parallel light. Therefore, the light utilization factor and the light emission uniformity of the light guide 8 can be further improved.

  Further, the second light guide 12 of the present embodiment is arranged in an intermediate region in the first direction in which the first light guide 10 extends. Thereby, the light emission uniformity on the emission surface 14 that is long in the first direction can be improved. Further, the light guide 8 of the present embodiment has a plurality of second light guides 12, which are arranged at predetermined intervals in the first direction. Thereby, the light emission uniformity can be further improved.

(Embodiment 2)
The vehicle lamp 1 according to the second embodiment has substantially the same configuration as the vehicle lamp 1 according to the first embodiment except for the shape of the light guide 8. Hereinafter, the vehicle lamp 1 according to the second embodiment will be described focusing on a configuration different from that of the first embodiment, and a common configuration will be briefly described or description thereof will be omitted.

  FIG. 5 is a vertical cross-sectional view showing a schematic structure of a part of the vehicle lamp according to the second embodiment. The light guide 8 included in the vehicular lamp 1 (1B) according to the present embodiment has a third light guide 32 in addition to the first light guide 10 and the second light guide 12. The third light guide 32 is a rod-shaped translucent member extending along the first light guide 10. The first light guide 10 and the third light guide 32 are in contact with each other. The second light guide 12 is connected to the third light guide 32. The second light guide section 12 is connected to a region on the peripheral surface of the third light guide section 32 facing the lamp rear side.

  The light from the light source 6 is incident on the first light guide 10 from the second light guide 12 via the third light guide 32. The light that has entered the second light guide 12 is converted by the converter 22 into parallel light that travels toward the third light guide 32, and enters the third light guide 32. Similar to the connection mode between first light guide unit 10 and second light guide unit 12 in the first embodiment, conversion unit 22 of second light guide unit 12 is configured to be parallel reflected toward third light guide unit 32. The angle between the traveling direction of the light and the extending direction of the third light guide 32 is designed to be an acute angle. For example, the converter 22 is designed so that the parallel light approaches the end face 19 of the first light guide 10 as it approaches the third light guide 32.

  The third light guide portion 32 has a reflection surface 28 that totally reflects the parallel light on the inner surface of the peripheral surface on the front side of the lamp in a region intersecting with the traveling direction of the parallel light incident from the second light guide portion 12. The parallel light that has entered the third light guide portion 32 from the second light guide portion 12 is internally reflected by the reflection surface 28, and then repeats internal reflection within the third light guide portion 32 and travels toward the end surface 19. I do. In this process, part of the light enters the first light guide 10 from a region where the peripheral surface of the third light guide 32 and the peripheral surface of the first light guide 10 are in contact with each other. Then, the inner surface is repeatedly reflected on the peripheral surface of the first light guide section 10 to travel toward the end face 19.

  On the back surface 16 of the first light guide unit 10, an optical structure 26 for emitting the light in the first light guide unit 10 from the emission surface 14 is provided. For this reason, a part of the light traveling in the first light guide 10 is reflected by the optical structure 26 and emitted from the emission surface 14 to the outside of the first light guide 10. The third light guide 32 has no optical structure 26. A light-transmitting inner cover 34 is disposed on the front side of the lamp of the light guide 8. The light emitted from the emission surface 14 passes through the inner cover 34 and the outer cover 4 and is emitted to the front of the lamp.

  The inner cover 34 is fixed to the extension member 36. The extension member 36 is fixed to the lamp body 2. The extension member 36 has an opening 38 that allows light emitted from the emission surface 14 to travel forward of the lamp. The opening 38 is covered with the inner cover 34. The edge 40 of the opening 38 is arranged so as to overlap at least a part of the third light guide 32 when viewed from the front side of the lamp. Thus, at least a part of the third light guide 32 and the second light guide 12 can be hidden from the outside of the lamp. As a result, the design and appearance of the vehicle lamp 1 can be improved.

  In the present embodiment, the first light guide unit 10, the second light guide unit 12, and the third light guide unit 32 are integrally formed products. The light guide 8 is fitted into the holder 42 and supported by the lamp body 2. The holder 42 covers the entirety of the second light guide unit 12 except for the conversion unit 22 and the back surfaces of the third light guide unit 32 and the first light guide unit 10. The holder 42 may function as a reflector.

  As described above, the vehicular lamp 1 according to the present embodiment includes the rod-shaped third light guide 32 extending along the first light guide 10, and the second light guide 12 includes the third light guide 12. It is connected to the light unit 32. Then, the light from the light source 6 enters the first light guide 10 from the second light guide 12 via the third light guide 32. The conversion unit 22 converts light incident from the incident surface 20 into parallel light, and causes the light to enter the third light guide unit 32. Accordingly, light leakage from the second light guide unit 12 or the third light guide unit 32 can be suppressed, so that light use efficiency can be improved.

  The embodiment of the invention has been described above in detail. The above-described embodiments are merely specific examples for implementing the present invention. The contents of the embodiments do not limit the technical scope of the present invention, and many design changes such as changes, additions, and deletions of constituent elements are made without departing from the spirit of the invention defined in the claims. Is possible. In the above-described embodiment, such contents that can be changed in design are emphasized with notations such as “of the present embodiment” and “in the present embodiment”. The design change is allowed even for the contents without the. Any combination of the above components is also effective as an aspect of the present invention. The hatching attached to the cross section of the drawing does not limit the material to which the hatching is applied.

  Although the vehicle lamp 1 according to the embodiment includes two second light guides 12, the number thereof is not particularly limited and may be one or three or more. The conversion unit 22 is not limited to a parabolic reflection surface. For example, the conversion unit 22 may be a collimator lens or the like that is converted into parallel light when light traveling toward the first light guide unit 10 passes.

  Note that any combination of the above-described components, and any conversion of the expression of the present invention among methods, apparatuses, systems, and the like are also effective as embodiments of the present invention.

  DESCRIPTION OF SYMBOLS 1 Vehicle lamp, 6 light sources, 10 1st light-guide part, 12 2nd light-guide part, 14 emission surface, 16 back surface, 20 incidence surface, 22 conversion part, 26 optical structure, 28 reflection surface, 32 3rd light-guide Department.

Claims (7)

A light source,
A rod-shaped first light guide portion having a light exit surface that is long in a first direction and emitting light from the light exit surface while guiding light from the light source inside;
A second light-guiding unit having a light incident surface of the light source, and guiding the light of the light source to the first light-guiding unit while guiding the light therein.
The vehicle light according to claim 1, wherein the second light guide unit includes a conversion unit that converts light incident from the incident surface into parallel light. A light source,
A rod-shaped first light guide portion having a light exit surface that is long in a first direction and emitting light from the light exit surface while guiding light from the light source inside;
A second light-guiding unit having a light incident surface of the light source, and guiding the light of the light source to the first light-guiding unit while guiding the light therein.
The vehicle light according to claim 1, wherein the second light guide has a parabolic reflection surface that reflects light incident from the incident surface.   The vehicular lamp according to claim 2, wherein the light source is disposed such that a light emitting surface includes a focal point of the parabolic reflection surface. The second light guide unit is connected to a back surface of the first light guide unit that faces away from the emission surface,
The back surface has an optical structure for emitting light in the first light guide from the emission surface,
The vehicular lamp according to any one of claims 1 to 3, wherein the first light guide has a reflection surface on the emission surface side that totally reflects light incident from the second light guide on an inner surface. .   The vehicular lamp according to any one of claims 1 to 4, wherein the second light guide is disposed in an intermediate region of the first light guide in the first direction. A plurality of the second light guides,
The vehicular lamp according to any one of claims 1 to 5, wherein the plurality of second light guides are arranged at predetermined intervals in the first direction. A rod-shaped third light guide extending along the first light guide;
The second light guide is connected to the third light guide,
4. The vehicular lamp according to claim 1, wherein the light of the light source is incident on the first light guide from the second light guide via the third light guide. 5.

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