Vehicular lighting fixture

Abstract

To provide a vehicular lighting fixture capable of suppressing generation of luminance unevenness.SOLUTION: A vehicular lighting fixture includes a light source, and a rod-like light guide body for guiding light from the light source and emitting it. The light source has a light emitting surface for emitting light toward a front surface side in a vehicle loaded state. The light guide body includes: an incident surface which is arranged at one end in the longer direction, which is opposed to the light emitting surface, and where light emitted from the light emitting surface enters; a light guide part extending from the incident surface, and configured to guide the light which has entered from the incident surface; an emission part which extends from the light guide part, which has a prism part for internally reflecting the light, and which guides the light from the light guide part and internally reflects at the prism part and emits it from the side surface; and an auxiliary emission part provided so as to protrude from the light guide part, and configured to guide part of the light from the light source.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a vehicle lamp. [Background technology]

[0002] 2. Description of the Related Art There is known a vehicle lamp configured to guide light from a light source through a rod-shaped light guide and emit it from the light guide to the front of the vehicle (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-115397 A Summary of the Invention [Problem to be solved by the invention]

[0004] The vehicle lamp described in Patent Document 1 emits light over the entire length of the light guide, and thus has a prism portion formed on the rear side of the light guide over the entire length of the light guide that internally reflects light toward the emission direction. However, in this configuration, a prism portion is also provided near the light source of the light guide, so that light from the light source is directly irradiated onto the prism portion near the light source, which may cause brightness unevenness along the length of the light guide. In the above vehicle lamp, it is required to suppress the occurrence of such brightness unevenness.

[0005] The present invention has been made in view of the above, and has an object to provide a vehicle lamp capable of suppressing the occurrence of luminance unevenness. [Means for solving the problem]

[0006] The vehicle lamp of the present invention comprises a light source and a rod-shaped light guide that guides and emits light from the light source, the light source having a light-emitting surface that emits light toward the front side when mounted on the vehicle, the light guide being arranged at one end in the longitudinal direction, facing the light-emitting surface, and having an entrance surface into which light emitted from the light-emitting surface is incident, a light guide section extending from the entrance surface and guiding the light incident from the entrance surface, a prism section extending from the light guide section that internally reflects light, an exit section that guides the light from the light guide section, internally reflects it at the prism section, and emits it from a side surface, and an auxiliary exit section that is arranged to protrude from the light guide section and guides a portion of the light from the light source. Effect of the Invention

[0007] According to the present invention, it is possible to provide a vehicle lamp capable of suppressing the occurrence of uneven brightness. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of the rear part of a vehicle according to this embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of a vehicle lamp according to this embodiment. [Diagram 3] FIG. 3 is a diagram illustrating an example of a vehicle lamp according to this embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of a vehicle lamp according to this embodiment. [Diagram 5] FIG. 5 is a diagram illustrating an example of a vehicle lamp according to this embodiment. [Figure 6] FIG. 6 is a diagram illustrating a schematic view of another example of a vehicle lamp according to the present embodiment. [Figure 7] FIG. 7 is a diagram illustrating a schematic view of another example of a vehicle lamp according to the present embodiment. [Figure 8] FIG. 8 is a diagram illustrating a schematic view of another example of a vehicle lamp according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a vehicle lamp according to the present invention will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same.

[0010] In this embodiment, the front and rear directions are directions in a state where the device is mounted on a vehicle (mounted on a vehicle). For example, when the device is mounted on the front of the vehicle, the front is the front direction (front side) and the rear is the rear direction (rear side). When the device is mounted on the rear of the vehicle, the rear is the front direction (front side) and the front is the rear direction (rear side). When the device is mounted on the side of the vehicle, the outside of the vehicle is the front direction (front side) and the inside of the vehicle is the rear direction (rear side).

[0011] FIG. 1 is a diagram showing an example of the rear part of a vehicle 1 according to this embodiment. As shown in FIG. 1, the vehicle 1 includes a vehicle body 2, a running device 3, and a vehicle lamp 100. The vehicle body 2 has a driver's cab in which a driver sits. The vehicle body 2 is supported by the running device 3. The running device 3 has wheels on which tires 4 are mounted, a steering device for changing the traveling direction of the vehicle 1, and a brake device for decelerating or stopping the running device 3. The vehicle 1 includes a boarding door provided on a side of the vehicle body 2, and a back door 7 provided on the rear of the vehicle body 2. The boarding door and the back door 7 are each movably supported by the vehicle body 2 via a hinge mechanism.

[0012] In this embodiment, the vehicular lamp 100 is provided on each of the left and right sides of the rear of the vehicle body 2. In this embodiment, the vehicular lamp 100 is provided at the rear of the vehicle body 2. Therefore, the rear side in the fore-and-aft direction will be described as the front side of the vehicular lamp 100, and the front side in the fore-and-aft direction will be described as the back side of the vehicular lamp 100.

[0013] The vehicle lamp 100 includes a functional lamp. Examples of the functional lamp include a tail lamp provided at the rear of the vehicle body 2 and turned on in conjunction with the lighting of the head lamp, a stop lamp provided at the rear of the vehicle body 2 and turned on in conjunction with the operation of the brake device, and a rear turn signal lamp provided at the rear of the vehicle body 2 and turned on to indicate to the surroundings the traveling direction of the vehicle 1.

[0014] The vehicle lamps 100 are disposed, for example, on the vehicle body 2 side. In this embodiment, the vehicle body 2 is a fixed part. The back door 7 is a movable part. The structure of the vehicle lamp 100 provided on the left rear part of the vehicle body 2 and the structure of the vehicle lamp 100 provided on the right rear part of the vehicle body 2 are symmetrical in the left-right direction and are substantially the same structure. Hereinafter, the vehicle lamp 100 provided on the left rear part of the vehicle body 2 will be mainly described, and the description of the vehicle lamp 100 provided on the right rear part of the vehicle body 2 will be simplified or omitted.

[0015] 2 to 5 are diagrams showing an example of a vehicular lamp 100 according to this embodiment. FIG. 2 is a diagram showing the vehicular lamp 100 as viewed from above. FIG. 3 is a perspective view showing a part of the vehicular lamp 100 as viewed from the upper rear left side. FIG. 4 is a plan view showing an enlarged view of a part of the vehicular lamp 100. FIG. 5 is a diagram showing a schematic view of the inside of the vehicular lamp 100 as viewed from the left side.

[0016] 2 to 5, the vehicle lamp 100 includes a light source 10, a light guide 20, an inner lens 30, and an outer lens 40. Although not shown in the drawings, the vehicle lamp 100 also includes an inner housing and an outer housing.

[0017] The light source 10 is disposed on the outside of the vehicle. For example, a semiconductor light source such as an LED, a laser light source, or the like is used as the light source 10. The light source 10 has a light emitting surface 11 that emits light. The light emitting surface 11 faces the front side.

[0018] The light guide 20 is rod-shaped. The light guide 20 extends, for example, from the outside to the inside of the vehicle so as to curve toward the front side, along the slant shape of the vehicle lamp 100. In this embodiment, the light guide 20 is disposed on the front side of the light source 10.

[0019] The light guide 20 has an incident surface 21, a light guide section 22, an exit section 23, and an auxiliary exit section 24. The incident surface 21 is disposed at one end of the light guide 20 in the longitudinal direction, and faces the light emitting surface 11 of the light source 10. The light from the light source 10 is incident on the incident surface 21. In the light guide 20, the incident surface 21 is disposed, for example, at an end on the outer side and rear side of the vehicle. This shape allows the light from the light source 10 to be appropriately guided inside the vehicle lamp 100 having a slant shape.

[0020] Light guiding section 22 is a section that extends toward the front side from incident surface 21. Light guiding section 22 guides the light that has entered through incident surface 21.

[0021] The exit portion 23 is a portion extending from the light guide portion 22 toward the inside of the vehicle. The exit portion 23 is formed up to the other end side of the light guide 20 in the longitudinal direction. The exit portion 23 guides light from the light source 10 and emits it from the side surface 23a toward the inner lens 30. In this embodiment, as described later, the inner lens 30 is disposed on the lower side of the light guide 20. Therefore, the exit portion 23 emits light downward from the lower part of the side surface 23a. The side surface 23a is provided with a prism portion 23b on the opposite side to the inner lens 30, i.e., on the upper part. The prism portion 23b reflects the light that is incident from the incident surface 21 and is internally reflected by the side surface 23a in the exit direction, i.e., the downward side where the inner lens 30 is disposed. The light reflected by the prism portion 23b is emitted downward from the side surface 23a of the light guide 20 toward the inner lens 30.

[0022] The auxiliary emission section 24 is provided so as to protrude from the light guiding section 22 to the outside of the vehicle. The auxiliary emission section 24 guides a portion of the light incident from the incident surface 21 and emits it toward the inner lens 30. The auxiliary emission section 24 is plate-shaped. The auxiliary emission section 24 is disposed along an end surface 31a of the inner lens 30, which will be described later.

[0023] The auxiliary emission part 24 has a base part 25, an opening part 26, and an inclined part 27. The base part 25 is plate-shaped, and guides the light that has entered the auxiliary emission part 24.

[0024] The opening 26 is formed to penetrate the base portion 25 in the thickness direction. The opening 26 reflects light internally. In this embodiment, the opening 26 is provided at a position in contact with the light guide portion 22. With this arrangement, a part of the light guide portion 22 faces the opening 26. Therefore, the light traveling inside the light guide portion 22 is internally reflected at the opening 26, and the traveling toward the auxiliary emission portion 24 is restricted. In this way, the opening 26 is arranged at a position in contact with the light guide portion 22, so that the amount of light traveling from the light guide portion 22 to the auxiliary emission portion 24 can be adjusted. In addition, the opening 26 internally reflects the light incident on the base portion 25. In this case, the light can be diffused at the opening 26.

[0025] A plurality of openings 26 may be provided at positions in contact with light guiding section 22. That is, a plurality of openings 26 may be provided at positions in contact with light guiding section 22 with intervals therebetween.

[0026] The inclined portion 27 is formed at the front end of the base portion 25. The inclined portion 27 internally reflects the light incident on the auxiliary emission portion 24 toward the end surface 31a (described later) of the inner lens 30, i.e., downward. In this embodiment, the inclined portion 27 is a surface formed to be inclined downward toward the front side. The inclined portion 27 may be flat, curved, or a combination of these. The light internally reflected by the inclined portion 27 is emitted downward from the lower surface 24a of the auxiliary emission portion 24. By providing the inclined portion 27, the light that has entered the base portion 25 can be reliably emitted toward the inner lens 30.

[0027] The auxiliary emission section 24 is disposed closer to the light source 10 than the prism section 23b provided in the emission section 23. This arrangement allows the area in which the inner lens 30 can be disposed to be expanded in the left-right direction, that is, to the light guide section 22 on the light source 10 side than the portion where the prism section 23b is provided.

[0028] The inner lens 30 guides the light emitted from the light guide 20 and emits the light at least in a forward direction when mounted on the vehicle. The inner lens 30 is disposed, for example, below the light guide 20. The inner lens 30 has a rod-shaped portion 31 and a plate-shaped portion 32. The inner lens 30 has the rod-shaped portion 31 and the plate-shaped portion 32 provided, for example, as a single member. The inner lens 30 may have a plate-shaped rib portion (not shown) protruding toward the front side at one end in the longitudinal direction.

[0029] The rod-shaped portion 31 extends linearly, for example, in the vertical direction. The plate-shaped portion 32 is formed integrally with the rod-shaped portion 31. The plate-shaped portion 32 connects between adjacent rod-shaped portions 31. The plate-shaped portion 32 is, for example, in the shape of a flat plate, and is disposed in the vertical direction so as to correspond to the rod-shaped portion 31.

[0030] The rod-shaped portion 31 and the plate-shaped portion 32 are disposed across both the emission portion 23 and the auxiliary emission portion 24 of the light guide 20. Hereinafter, of the rod-shaped portion 31 and the plate-shaped portion 32, the portion corresponding to the emission portion 23 may be referred to as the emission-side portion 30P, and the portion corresponding to the auxiliary emission portion 24 may be referred to as the auxiliary-side portion 30Q.

[0031] The rod-shaped portion 31 has an end face (inner side incident face) 31a and a side face 31b. The end face 31a receives the light emitted from the light guide 20. The side face 31b emits the light that enters the rod-shaped portion 31. The side face 31b has a prism portion 31c formed on the rear side when mounted on the vehicle. The prism portion 31c reflects the light that enters from the end face 31a and is internally reflected by the side face 31b to the front side when mounted on the vehicle. The light reflected by the prism portion 31c is emitted from the side face 31b of the rod-shaped portion 31 in the front direction. In this embodiment, the light reflected by the prism portion 31c is emitted, for example, from the side face 31b toward the rear of the vehicle.

[0032] The plate-shaped portion 32 has an end face (inner side incident face) 32a, a reflecting surface 32b, and an exit surface 32c. The end face 32a causes the light emitted from the light guide 20 to enter the inside of the plate-shaped portion 32.

[0033] An end face 31a of the rod-shaped portion 31 and an end face 32a of the plate-shaped portion 32 face the emission side portion 30P and the auxiliary side portion 30Q, respectively. The end faces 31a, 32a provided on the emission side portion 30P face the side surface 23a of the emission portion 23 of the light guide 20. The end faces 31a, 32a provided on the auxiliary side portion 30Q face the lower surface 24a of the auxiliary emission portion 24. The rod-shaped portion 31 and the plate-shaped portion 32 are arranged such that the end faces 31a, 32a face the side surface 23a and the lower surface 24a of the light guide 20 with a gap in a predetermined direction (downward). The end faces 31a, 32a allow the light emitted from the side surface 23a and the lower surface 24a of the light guide 20 to enter inside.

[0034] The light incident on the rod-shaped portion 31 is guided inside the rod-shaped portion 31 by internal reflection. Prism portion 31c is disposed on the back side of the rod-shaped portion 31. The light incident on the rod-shaped portion 31 is reflected by prism portion 31c and emitted from side surface 31b toward the rear of the vehicle.

[0035] Further, a part of the light incident on rod portion 31 is reflected by prism portion 32d and emitted from emission surface 32c toward the side of the vehicle.

[0036] The outer lens 40 is disposed on the front side, i.e., rear side, of the inner lens 30. The outer lens 40 outputs the light emitted from the inner lens 30 to the outside of the vehicle lamp 100. The outer lens 40 is plate-shaped. The outer lens 40 has a shape that is curved toward the rear side from the inside of the vehicle to the outside of the vehicle. The outer lens 40 is formed, for example, using a resin material that is transparent or has a color similar to the lighting color.

[0037] Next, an example of turning on the vehicle lamp 100 configured as described above will be described. When a driver performs a predetermined operation to turn on the tail lamp, the vehicle lamp 100 acquires an operation signal from an operation device. A control circuit provided on a board or the like of the light source 10 controls the light emission of the light source 10 in response to the acquired signal.

[0038] 4 and 5, light is emitted from light-emitting surface 11 of light source 10. This light is incident on light-guiding section 22 from incident surface 21 of light guide 20. A part of the light incident on light-guiding section 22 (hereinafter referred to as light L1) is guided by light-guiding section 22 and enters emission section 23, is internally reflected by prism section 23b, and is emitted downward from side surface 23a.

[0039] Another part of the light incident on light guiding section 22 (hereinafter referred to as light L2) enters auxiliary emission section 24 from light guiding section 22. Light L2 incident on auxiliary emission section 24 is guided by, for example, base section 25, and is diffused by internal reflection at opening 26 and outer peripheral surface 25a of base section 25, reaches inclined section 27, and is internally reflected by inclined section 27 to be emitted downward from lower surface 24a.

[0040] Light L1 emitted downward from the side surface 23a of the emission portion 23 enters the emission side portion 30P of the inner lens 30 from the end face 31a. The light L1 that enters the emission side portion 30P is internally reflected by the prism portion 31c and the like, and is emitted to the front side of the inner lens 30. The light L1 emitted to the front side of the inner lens 30 is emitted to the rear of the vehicle via the vehicle inner side portion and center portion of the outer lens 40 in the left-right direction.

[0041] The light L2 emitted downward from the lower surface 24a enters the auxiliary side portion 30Q of the inner lens 30 from the end surface 31a. The light L2 that enters the auxiliary side portion 30Q is internally reflected by the prism portion 31c and the like, and is emitted to the front side of the inner lens 30. The light L2 emitted to the front side of the inner lens 30 is emitted in the left-right direction to the rear of the vehicle via the vehicle outer portion of the outer lens 40.

[0042] In this way, the light L1 guided to the exit portion 23 of the light guide 20 causes the front side portion of the outer lens 40 to emit light via the exit side portion 30P of the inner lens 30. Also, the light L2 guided to the auxiliary exit portion 24 of the light guide 20 causes the vehicle outer side portion of the outer lens 40 to emit light via the auxiliary side portion 30Q of the inner lens 30. Therefore, the vehicle outer side portion of the outer lens 40 can also emit light with a sufficient amount of light. Also, brightness unevenness between the front side portion and the vehicle outer side portion of the outer lens 40 can be suppressed.

[0043] Fig. 6 and Fig. 7 are diagrams showing another example of a vehicle lamp according to this embodiment, Fig. 6 being a perspective view and Fig. 7 being a plan view.

[0044] The vehicle lamp 100A shown in Fig. 6 and Fig. 7 has an incident surface (auxiliary side incident surface) 24b in the auxiliary light guide section 24A, which is provided in a state of being flush with the incident surface 21 of the light guide 20. The incident surface 24b faces the light emitting surface 11 of the light source 10. A part of the light (hereinafter, referred to as light L3) emitted from the light emitting surface 11 is directly incident on the incident surface 24b. The light L3 emitted from the light emitting surface 11 is directly incident on the incident surface 24b, thereby improving the light utilization efficiency. The incident surface 24b may have a shape extending from the incident surface 21 of the light guide 20 or the light guide section 22 to the light source 10 side.

[0045] Further, auxiliary light guiding section 24A has an opening 28 in addition to opening 26. Opening 28 is provided at a position of base section 25 away from light guiding section 22. Light diffusion section 28a that diffuses light is formed in opening 28. Light diffusion section 28a may have a curved surface, for example. Note that the shape of light diffusion section 28a is not limited to a curved surface and may have another shape.

[0046] Light L3 incident from the incident surface 24b and traveling through the base portion 25, and light incident from the incident surface 21 and traveling through the base portion 25 (hereinafter referred to as light L4) are internally reflected by the light diffusion portion 28a so as to be diffused when they reach the opening 28. The lights L3 and L4 internally reflected by the light diffusion portion 28a travel inside the base portion 25, are internally reflected by the opening 26 and the outer peripheral surface 25a, etc., and reach the inclined portion 27. The lights L3 and L4 that reach the inclined portion 27 are internally reflected by the inclined portion 27 and are emitted from the lower surface 24a to the inner lens 30 side (downward).

[0047] FIG. 8 is a diagram showing a schematic diagram of another example of a vehicle lamp according to this embodiment. The vehicle lamp 100B shown in FIG. 8 has a notch 29 in the auxiliary light guide 24B. The notch 29 is provided in a part of the outer peripheral surface 25a of the base portion 25. When the light (hereinafter referred to as light L5) that enters from the incident surface 21 and travels through the base portion 25 reaches the notch 29, it is internally reflected by the notch 29. The light L5 that is internally reflected by the notch 29 travels inside the base portion 25, is internally reflected by the outer peripheral surface 25a, etc., and reaches the inclined portion 27. The light L5 that reaches the inclined portion 27 is internally reflected by the inclined portion 27 and is emitted from the lower surface 24a to the inner lens 30 side (downward).

[0048] As described above, the vehicle lamp 100 of this embodiment comprises a light source 10 and a rod-shaped light guide 20 that guides and emits light from the light source 10. The light source 10 has a light-emitting surface 11 that emits light toward the front side when mounted on the vehicle. The light guide 20 is arranged at one end in the longitudinal direction, faces the light-emitting surface 11, and has an incident surface 21 on which light emitted from the light-emitting surface 11 is incident, a light guide section 22 that extends from the incident surface 21 and guides the light incident from the incident surface 21, a prism section 23b that extends from the light guide section 22 and internally reflects light, and an exit section 23 that guides the light from the light guide section 22, internally reflects it at the prism section 23b, and emits it from the side surface 23a, and an auxiliary exit section 24 that is provided to protrude from the light guide section 22 and guides a portion of the light from the light source 10.

[0049] According to this configuration, by providing the auxiliary exit portion 24 in the light guide portion 22 of the light guide 20, it is possible to emit light from both the exit portion 23 and the auxiliary exit portion 24. Therefore, it is possible to emit light over the entire length of the light guide 20. Also, since the auxiliary exit portion 24 is provided in the light guide portion 22 where the prism portion 23b is not provided, it is possible to prevent the light from the light source 10 from directly irradiating the prism portion 23b. Therefore, it is possible to suppress uneven brightness in the length direction of the light guide 20.

[0050] The vehicle lamp 100 of this embodiment further includes an inner lens 30 that guides the light emitted from the light guide 20 and emits it to the front side, and the light guide 20 has a prism portion 23b on the side 23a opposite the inner lens 30 that reflects light toward the inner lens 30, and the inner lens 30 is arranged to face both the emission portion 23 and the auxiliary emission portion 24.

[0051] According to this configuration, the light guide 20 has a prism portion 23b on the side 23a opposite the inner lens 30 that reflects light toward the inner lens 30, and the inner lens 30 is arranged to face both the exit portion 23 and the auxiliary exit portion 24, so that light can be efficiently incident from the light guide 20 to the inner lens 30.

[0052] In the vehicle lamp 100 according to this embodiment, the auxiliary emission portion 24 is plate-shaped.

[0053] According to this configuration, the amount of light entering the auxiliary exit section 24 from the light guiding section 22 can be reduced.

[0054] In the vehicle lamp 100 according to this embodiment, the inner lens 30 has an end surface 31a, which faces the light guide 20, onto which light from the light guide 20 enters, and the auxiliary emission portion 24 is disposed along the end surface 31a.

[0055] According to this configuration, the light emitted from the auxiliary emission part 24 can be efficiently incident on the end face 31a.

[0056] In the vehicle lamp 100 according to this embodiment, the auxiliary emission portion 24 has an inclined portion 27 that internally reflects the light from the light source 10 toward the end face 31a.

[0057] According to this configuration, the light from the light source 10 is internally reflected by the inclined portion 27 and emitted, so that the light can be efficiently emitted from the auxiliary emission portion 24 to the end surface 31a.

[0058] In the vehicle lamp 100 according to this embodiment, the auxiliary emission section 24 has openings 26, 28 that open in the thickness direction.

[0059] According to this configuration, the light traveling inside the auxiliary emission part 24 can be internally reflected by the openings 26, 28. Therefore, the traveling direction of the light inside the auxiliary emission part 24 can be adjusted.

[0060] In the vehicle lamp 100 according to this embodiment, the opening 26 is disposed at a position in contact with the light guiding section 22 .

[0061] According to this configuration, opening 26 is disposed at a position in contact with light guiding section 22, so that light attempting to enter auxiliary emission section 24 from the light guiding section 22 side can be internally reflected back toward light guiding section 22. Therefore, the amount of light entering auxiliary emission section 24 can be adjusted.

[0062] In the vehicle lamp 100 according to this embodiment, the opening 28 has a light diffusion portion 28a on its inner circumferential surface that diffuses light.

[0063] According to this configuration, by diffusing the light incident on the auxiliary exit portion 24 by the light diffusion portion 28a, the amount of light emitted from the auxiliary exit portion 24 can be made uniform in the left-right direction.

[0064] In the vehicle lamp 100 according to this embodiment, the auxiliary emission portion 24 has a notch portion 29 in a part of the outer circumferential surface 25a.

[0065] According to this configuration, the light traveling inside the auxiliary emission part 24 can be internally reflected by the cutout part 29. Therefore, the traveling direction of the light inside the auxiliary emission part 24 can be adjusted.

[0066] In the vehicle lamp 100 according to this embodiment, the auxiliary emission portion 24 has an entrance surface 24b that is provided flush with the entrance surface 21 and on which the light from the light source 10 is incident.

[0067] According to this configuration, the light from the light source 10 can be made to directly enter the auxiliary emission part 24 from the incident surface 24b. This makes it possible to improve the light utilization efficiency.

[0068] In the vehicle lamp 100 according to this embodiment, the auxiliary emission portion 24 is disposed closer to the light source 10 than the prism portion 31c.

[0069] According to this configuration, the auxiliary emission portion 24 can reliably emit light from the range where the prism portion 31c is not provided.

[0070] The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0071] L1, L2, L3, L4, L5...light, 1...vehicle, 2...vehicle body, 3...running gear, 4...tire, 7...back door, 10...light source, 11...light emitting surface, 20...light guide, 21, 24b...incident surface, 22...light guide section, 23...exit section, 23a, 31b...side surface, 23b, 31c, 32d...prism section, 24...auxiliary exit section, 24A, 24B...auxiliary light guide section, 24a...bottom surface, 25...base portion, 25a...outer peripheral surface, 26, 28...opening, 27...inclined portion, 28a...light diffusion portion, 29...notch portion, 30...inner lens, 30P...emission side portion, 30Q...auxiliary side portion, 31...rod-shaped portion, 31a, 32a...end surface, 32...plate-shaped portion, 32b...reflective surface, 32c...emission surface, 40...outer lens, 100, 100A, 100B...vehicle lamp

Claims

1. A light source; a rod-shaped light guide that guides and emits light from the light source; Equipped with The light source has a light emitting surface that emits light toward a front side when mounted on a vehicle, The light guide is an incident surface disposed at one end in a longitudinal direction, facing the light emitting surface, and into which light emitted from the light emitting surface is incident; a light guide portion extending from the incident surface and guiding the light incident from the incident surface; an exit portion extending from the light guiding portion and including a prism portion for internally reflecting light, the exit portion guiding the light from the light guiding portion, internally reflecting the light at the prism portion, and emitting the light from a side surface; an auxiliary emission section that is provided so as to protrude from the light guiding section and that guides a portion of the light from the light source; Vehicle lighting fixtures.

2. Further, an inner lens is provided to guide the light emitted from the light guide body and emit the light to the front side, The light guide has the prism portion that reflects light toward the inner lens on a side opposite to the inner lens, The inner lens is disposed so as to face both sides of the emission portion and the auxiliary emission portion.

2. A vehicle lamp according to claim 1.

3. The auxiliary emission portion is plate-shaped.

2. A vehicle lamp according to claim 1.

4. The inner lens has an inner-side incident surface on which light from the light guide is incident at a portion facing the light guide, The auxiliary exit portion is disposed along the inner side entrance surface.

3. A vehicle lamp according to claim 2.

5. The auxiliary emission portion has an inclined portion that internally reflects the light from the light source toward the inner side incident surface.

5. A vehicle lamp according to claim 4.

6. The auxiliary emission section has an opening that opens in the thickness direction.

4. A vehicle lamp according to claim 3.

7. The opening is disposed at a position adjacent to the light guiding portion.

7. A vehicle lamp according to claim 6.

8. The opening has a light diffusion portion on an inner circumferential surface thereof for diffusing the light.

7. A vehicle lamp according to claim 6.

9. The auxiliary emission portion has a notch in a part of an outer circumferential surface.

4. A vehicle lamp according to claim 3.

10. The auxiliary emission portion has an auxiliary side incident surface that is flush with the incident surface and into which the light from the light source is incident.

2. A vehicle lamp according to claim 1.

11. The auxiliary emission section is disposed closer to the light source than the prism section.

2. A vehicle lamp according to claim 1.

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