Vehicle lighting

Abstract

To improve the uniformity of the light emitted from the light emission section. [Solution] The light guide has a light incident section, a light outgoing section, and a light passing section. At least a part of the light incident section is provided as a curved section and is formed in a shape having a longitudinal direction, with one end face in the longitudinal direction formed as a first incident surface facing the first light source and the other end face in the longitudinal direction formed as a second incident surface facing the second light source. The light outgoing section is formed in a shape having a longitudinal direction and has an outgoing surface that guides light in both directions in the longitudinal direction and emits the guided light. The light passing section has a light diffusion function and is formed in a flat plate shape and is located between the light incident section and the light outgoing section, and is continuous with the intermediate part in the longitudinal direction of the light incident section and the intermediate part in the longitudinal direction of the light outgoing section. Light emitted from the first light source and the second light source and incident on the light incident section passes through the light passing section and is incident on the light outgoing section.

Description

Technical Field

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[0001] The present invention relates to the technical field of vehicle lamps having a configuration for guiding light by a light guide.

Background Art

[0002] In vehicle lamps, a light source that emits light and a light guide that guides the light emitted from the light source are disposed inside a lamp outer casing composed of a cover and a lamp housing. Some vehicle lamps are provided with a light incident portion where light is incident on the light guide and a light emission portion where the guided light is emitted (see, for example, Patent Document 1).

[0003] In the vehicle lamp described in Patent Document 1, a plurality of light incident portions are continuously provided at an intermediate portion in the longitudinal direction of the light emission portion, and the tip surfaces of the light incident portions are each formed as an incident surface. A light source is disposed at a position facing each incident surface, and the light emitted from each light source is incident on the light guide from the incident surface. The light is guided from the light incident portion toward the tip of the light emission portion, and the light guided in the light emission portion is controlled (inner surface reflection) by a control step formed in the light emission portion and emitted from the light emission portion . <00​​​​​​​​​​​​​​​​​​​​​Incidentally, in a light guide having a configuration in which a light incident portion is provided continuously with a light emission portion, as described in Patent Document 1, the amount of light emitted from the connection portion with the light incident portion in the light emission portion tends to be greater than the amount of light emitted from other portions, and the difference in the amount of light emitted from each part of the emission surface in the light emission portion becomes large, so the uniformity of the emitted light cannot be ensured and visibility may decrease. In particular, in a configuration having a long light emission portion as described above, the light guide distance tends to be long, and the uniformity of the light is easily impaired.

[0006] Therefore, the vehicle lighting device of the present invention aims to improve the uniformity of the light emitted from the light emitting section. [Means for solving the problem]

[0007] The vehicle lighting device according to the present invention comprises a first light source that emits light, a second light source that emits light, and a light guide that guides the light emitted from the first and second light sources and emits the guided light, wherein the light guide has a light inlet portion, a light outlet portion and a light passage portion, and the light inlet portion is formed in a shape having a longitudinal direction with at least a part of it being a curved portion, and one end face in the longitudinal direction is formed as a first inlet surface facing the first light source, and the other end face in the longitudinal direction is formed as a second inlet surface facing the second light source. The light emitter is formed in a shape having a longitudinal direction and has an emitter surface that guides and emits light in both directions in the longitudinal direction, and the light pass-through part has a light diffusion function and is formed in a flat plate shape and is located between the light incident part and the light emitter, and is continuous with the intermediate part in the longitudinal direction of the light incident part and the intermediate part in the longitudinal direction of the light emitter, and light emitted from the first light source and the second light source and incident on the light incident part passes through the light pass-through part and is incident on the light emitter.

[0008] As a result, the light emitted from the first light source and the second light source is diffused through the light insertion section and then incident on the light emission section. [Effects of the Invention]

[0009] According to the present invention, since the light emitted from the first light source and the second light source is diffused from the light incident section through the light passing section and then incident on the light emission section, the uniformity of the light emitted from the light emission section can be improved. [Brief explanation of the drawing]

[0010] [Figure 1] Figures 2 to 11 illustrate embodiments of the vehicle lighting device of the present invention, and this figure is a perspective view of the vehicle lighting device. [Figure 2] This is a disassembled perspective view of the lamp unit. [Figure 3] This is an enlarged perspective view showing a portion of the holder. [Figure 4] This is an enlarged perspective view showing a part of the light guide. [Figure 5] This is an enlarged cross-sectional view of a portion where the light emission section, light passage section, and light incidence section are continuously arranged. [Figure 6] This is a front view showing the light guide being held in the holder. [Figure 7] This is an enlarged front view showing the holder with the shielding cover attached. [Figure 8] This is a cross-sectional view along the line VIII-VIII in Figure 7. [Figure 9] This is a cross-sectional view along the line IX-IX in Figure 7. [Figure 10] This is a conceptual diagram showing the path of light emitted from a light source. [Figure 11] This is a conceptual diagram showing the state of light as it passes through a light-transmitting section after being emitted from a light source. [Modes for carrying out the invention]

[0011] The embodiments for implementing the vehicle lighting device of the present invention will be described below with reference to the attached drawings.

[0012] The following describes the front, rear, up, down, left, and right directions with the irradiation direction of light from the vehicle lamp being the front. However, the front, rear, up, down, left, and right directions shown below are for convenience of explanation and are not limited to these directions in the implementation of the present invention.

[0013] The vehicle lamp 1 functions as, for example, a tail lamp. However, the vehicle lamp 1 is not limited to a tail lamp and may be other types of lamps attached to the front or rear side of the vehicle body.

[0014] The vehicle lamp 1 includes a lamp housing 2 having an opening at the front end and an outer cover 3 closing the opening of the lamp housing 2 (see FIG. 1). The vehicle lamp 1 is formed in, for example, a vertically long shape, and both the lamp housing 2 and the outer cover 3 are formed in a vertically long shape. The lamp housing 2 and the outer cover 3 constitute a lamp outer casing 4, and the internal space of the lamp outer casing 4 is formed as a lamp chamber 5.

[0015] An inner lens (not shown) and a lamp unit 6 are arranged in the lamp chamber 5 in a front-to-back arrangement. In addition to the inner lens and the lamp unit 6, other members such as an extension may be arranged in the lamp chamber 5.

[0016] The inner lens has a function of diffusing light, and, for example, a diffusion step (not shown) is formed on the front surface of the inner lens. The light is diffused in the vertical and horizontal directions by the diffusion step of the inner lens.

[0017] The lamp unit 6 has a holder 7, a light guide 8, and a shielding cover 9 (see FIGS. 1 and 2).

[0018] The holder 7 has, for example, a main body portion 10 formed in a vertically long annular shape and an arranging projection 11 protruding from the main body portion 10 (see FIGS. 2 and 3).

[0019] The main body portion 10 is formed, for example, in a vertically symmetrical shape and is oval in shape. However, the main body portion 10 may be formed in a shape other than vertically symmetrical, or in a shape other than oval. The main body portion 10 has an annular arrangement recess 10a that opens to the front, and the arrangement recess 10a is formed in an oval shape, for example, according to the overall shape of the main body portion 10.

[0020] The main body 10 has a first straight section 12 and a second straight section 13 that extend vertically and are spaced apart to the left and right, and two semi-circular curved sections 14 located above and below each of them. The portion of the first straight section 12 that is on the side of the second straight section 13 from the arrangement recess 10a is provided as the first inner section 15, and the portion of the second straight section 13 that is on the side of the first straight section 12 from the arrangement recess 10a is provided as the second inner section 16.

[0021] The main body portion 10 is provided with a positioning projection 16a that extends vertically on the outside of the second inner portion 16. The positioning projection 16a is located in the positioning recess 10a.

[0022] The positioning projection 11 protrudes substantially rearward from the end of the first inner portion 15 on the side of the second inner portion 16, and has a pair of end projections 17 positioned vertically apart and a central projection 18 positioned between the pair of end projections 17. The amount of protrusion of the end projections 17 from the first inner portion 15 is greater than the amount of protrusion of the central projection 18 from the first inner portion 15.

[0023] The holder 7 is provided with a first inner portion 15 and a central side projection 18, each having multiple receiving protrusions 19. The receiving protrusions 19 project forward, and for example, four are provided, with two each positioned vertically apart on the first inner portion 15 and the central side projection 18.

[0024] The holder 7 has two positioning recesses 20 formed on the central side projection 18, spaced vertically apart. The positioning recesses 20 are formed in a curved shape that is convex upward or downward. The holder 7 is provided with a mounting boss 21 at the end of the central side projection 18 on the side of the second inner portion 16. The mounting boss 21 has a screw hole 21a that opens forward.

[0025] The holder 7 has multiple cover positioning portions 22 formed therein. The cover positioning portions 22 are formed in a concave shape, for example, three are formed on the upper and three on the lower side of two positioning recesses 20. The cover positioning portions 22 are formed on the first inner portion 15 and the end-side projection 17.

[0026] The light guide 8 is formed by integrally integrating a light-emitting section 23, a light-injecting section 24, and a light-passing section 25 using a transparent material (see Figures 2, 4, and 5). The light guide 8 is formed, for example, in an up-and-down symmetrical shape.

[0027] The light-emitting section 23 is formed in a shape corresponding to the arrangement recess 10a of the holder 7, for example, in a vertically elongated oval (ring-shaped) form. The light-emitting section 23 has a first section 26 and a second section 27 that are spaced apart to the left and right and extend in the vertical direction, and two semi-circular third sections 28 that are located above and below these sections, respectively. The light-emitting section 23 has a substantially circular cross-sectional shape and has a control step 23a around its entire circumference on the rear surface. The front surface of the light-emitting section 23 is formed as the emission surface 23b.

[0028] Furthermore, the light-emitting portion 23 does not have to be formed in an annular shape such as an oval; for example, it may be formed in a straight line, a curved shape, or a non-annular shape with a part of it curved.

[0029] The light incident portion 24 is formed in a curved shape, at least in part, and its cross-sectional shape is substantially circular. The light incident portion 24 is formed in a vertically symmetrical shape, for example, and is located inside the light emission portion 23.

[0030] The light incident section 24 has a connecting section 29 that is gently curved in a convex manner toward the light emission section 23, a pair of first curved sections 30 that are continuous at both ends in the longitudinal direction of the connecting section 29, and a pair of second curved sections 31 that are continuous at both ends of the pair of first curved sections 30. The upper first curved section 30 is curved in a convex manner toward upward, and the lower first curved section 30 is curved in a convex manner toward downward, and the pair of first curved sections 30 are curved more than the connecting section 29. The second curved sections 31 are each curved in the opposite direction to the continuous first curved sections 30, and their tip surfaces are formed as the first incident surface 31a and the second incident surface 31b, respectively. The first incident surface 31a and the second incident surface 31b are facing backward.

[0031] The light-transmitting portion 25 is formed in a plate shape with its front-to-back direction as the thickness direction, and is formed, for example, in a roughly isosceles trapezoidal shape. The light-transmitting portion 25 is located between the light-emitting portion 23 and the light-injecting portion 24 and is continuous with both. The light-transmitting portion 25 is continuous with the longitudinal central portion of the first portion 26 and the longitudinal central portion of the connecting portion 29.

[0032] The light-transmitting portion 25 has a first edge 25a that is continuous with the light-emitting portion 23, which is longer than the second edge 25b that is continuous with the light-injecting portion 24. The portion of the periphery of the light-transmitting portion 25 located between the light-emitting portion 23 and the light-injecting portion 24 is formed as a pair of inclined edges 25c, and the inclined edges 25c are arranged to separate from each other in the vertical direction as they approach the light-emitting portion 23 from the light-injecting portion 24. Therefore, the light-transmitting portion 25 is shaped so that its vertical width H increases as it approaches the light-emitting portion 23 from the light-injecting portion 24.

[0033] The thickness T of the light-passing portion 25 is smaller than the front-to-back width S1 of the light-incident portion 24 and the front-to-back width S2 of the light-emitting portion 23 (see Figure 5). Diffusion steps (not shown) may be formed on one or both surfaces of the light-passing portion 25 in the thickness direction.

[0034] The shielding cover 9 is formed, for example, in an up-and-down symmetrical shape, with each part being integrally formed (see Figure 2). The shielding cover 9 has a base portion 32 extending vertically, a mounting portion 33 continuous with the base portion 32 except for the upper and lower ends, and a pair of protruding portions 34 projecting approximately rearward from the upper and lower ends of the mounting portion 33. A screw insertion hole 33a is formed in the mounting portion 33, penetrating from front to back.

[0035] A substrate 35 is positioned behind the light incident section 24. A first light source 36 and a second light source 37 are mounted on the substrate 35, separated vertically. Light-emitting diodes (LEDs) are used as the first light source 36 and the second light source 37. The first light source 36 and the second light source 37 are positioned opposite the first incident surface 31a and the second incident surface 31b of the light incident section 24, respectively. The first light source 36 and the second light source 37 may each be composed of one light-emitting diode or multiple light-emitting diodes.

[0036] The lamp unit 6 configured as described above has its holder 7 attached to the lamp housing 2, for example, by screw fastening.

[0037] The holder 7 holds the light guide 8 (see Figures 1, 6, and 7). The light guide 8 is positioned with the light emitting portion 23 inserted into the positioning recess 10a. When the light emitting portion 23 is inserted into the positioning recess 10a, the second portion 27 of the light emitting portion 23 is pressed from the front by a positioning projection 16a provided on the second inner portion 16, preventing the light guide 8 from falling out of the positioning recess 10a.

[0038] Furthermore, when the light-emitting section 23 is inserted into the positioning recess 10a, the light-transmitting section 25 is supported from behind by two receiving protrusions 19 provided on the first inner section 15, and the pair of first curved sections 30 are each inserted into the positioning recesses 20, thereby positioning the light guide 8 in the holder 7 (see Figures 7 and 8).

[0039] With the light guide 8 positioned on the holder 7, the light incident portion 24 is pressed from the front by the base portion 32 of the shielding cover 9 (see Figures 1, 8, and 9). The shielding cover 9 is positioned relative to the holder 7 by having both the upper and lower ends of the base portion 32, both the upper and lower ends of the mounting portion 33, and the tips of the pair of protruding portions 34 inserted into the cover positioning portion 22, and being supported from the rear by two receiving protrusions 19 provided on the central side protrusion 18 (see Figure 7). At this time, the connecting portion 29 and the light passing portion 25 of the light incident portion 24 are shielded from the front by the base portion 32 and mounting portion 33 of the shielding cover 9, and the first curved portion 30 and the second curved portion 31 of the light incident portion 24 are shielded from the front by the protruding portions 34 of the shielding cover 9.

[0040] With the light incident section 24 and the light passing section 25 shielded from the front by the shielding cover 9, the mounting screw 100 inserted through the screw insertion hole 33a is screwed into the screw hole 21a of the mounting boss 21 (see Figures 7 and 9). By screwing the mounting screw 100 into the screw hole 21a, the shielding cover 9 is attached to the holder 7 and the light guide 8 is held in the holder 7.

[0041] In the vehicle lighting fixture 1 configured as described above, light P1 and light P2 are emitted simultaneously from the first light source 36 and the second light source 37 (see Figure 10).

[0042] Light P1 emitted from the first light source 36 enters the light incident section 24 of the light guide 8 from the first incident surface 31a, is guided longitudinally in the light incident section 24, passes through the light passing section 25 via the connecting section 29 from the upper first curved section 30, and enters the light output section 23. Similarly, light P2 emitted from the second light source 37 enters the light incident section 24 of the light guide 8 from the second incident surface 31b, is guided longitudinally in the light incident section 24, passes through the light passing section 25 via the connecting section 29 from the lower first curved section 30, and enters the light output section 23.

[0043] When light P1 and light P2 emitted from the first light source 36 and the second light source 37 pass through the light-passing section 25, light P1 and light P2 are internally reflected on both sides of the light-passing section 25, mainly in the thickness direction, and head towards the light-emitting section 23 (see Figure 11). The thickness T of the light-passing section 25 is smaller than the width S1 of the light-incident section 24, so the number of internal reflections of light P1 and light P2 passing through the light-passing section 25 is increased, making them more likely to diffuse. In addition, the shape of the light-passing section 25 is such that the vertical width H increases as it approaches the light-emitting section 23 from the light-incident section 24, so the light spreads and diffuses more easily in the vertical direction (see Figure 10). Furthermore, if diffusion steps are formed on both sides of the light-passing section 25 in the thickness direction, light P1 and light P2 are further diffused and more likely to be incident on the light-emitting section 23. In addition, the light incident portion 24 is provided with a connecting portion 29 that is continuous with the first edge 25a of the light passing portion 25. Since the connecting portion 29 has a certain length L in the light guiding direction, light P1 and light P2 are incident on the light passing portion 25 from the entire length of the connecting portion 29, and the light P1 and light P2 incident on the light passing portion 25 are incident on the light passing portion 25 in a state that is spread out along the length of the connecting portion 29.

[0044] As light P1 and light P2 are diffused and incident from the light-passing section 25 to the light-emitting section 23, light P1 and light P2 are uniformly incident over the entire connecting section 23Q connected to the light-passing section 25 in the light-emitting section 23. Therefore, the brightness of the central part M of the connecting section 23P (shown by the dashed line in Figure 10) does not become dimmer than other parts of the light-emitting section 23.

[0045] Light P1 and P2, incident from the light-passing section 25 to the light-emitting section 23, are guided in the light-emitting section 23. At this time, light P1 and P2 guided by the control step 23a formed in the light-emitting section 23 are internally reflected (total internal reflection) and emitted forward from the emission surface 23b. Light P1 and P2 are emitted from the entire circumference of the light-emitting section 23, pass through the inner lens and outer cover 3, and are diffused by the inner lens before being directed forward.

[0046] When light is guided in the light-emitting section 23, the light P1 emitted from the first light source 36 and incident on the light-emitting section 23 and the light P2 emitted from the second light source 37 and incident on the light-emitting section 23 are guided in opposite directions in the annular light-emitting section 23. Therefore, since the light P1 and light P2 guided in opposite directions are emitted from each part of the emission surface 23b, the light P1 and light P2 emitted from the light-emitting section 23 are emitted as uniform light. Furthermore, as described above, since the light P1 and light P2 are diffused by the light-passing section 25 and incident on the light-emitting section 23, the uniformity of the light emitted from the light-emitting section 23 is high.

[0047] At this time, the light incident section 24 and the light passing section 25 are shielded from the front by the shielding cover 9. Therefore, when the light emitted from the first light source 36 and the second light source 37 is guided to the light incident section 24 and the light passing section 25, even if some light leaks out from the light incident section 24 and the light passing section 25, the leaked light is shielded by the shielding cover 9, and a good emission state is ensured in which light is emitted forward only from the light emission section 23.

[0048] Furthermore, in the vehicle lighting fixture 1, the light emitting section 23 is sandwiched between the shielding cover 9 and the holder 7, and the shielding cover 9 is attached to the holder 7.

[0049] Therefore, since the light guide 8 does not have a mounting portion for the holder 7, the inconvenience of some of the light incident on the light guide 8 reaching the mounting portion and causing leakage light does not occur. The shielding cover 9 prevents unnecessary light emission from the light incident portion 24 and the light passing portion 25, and also prevents leakage of light incident on the light guide 8, thereby improving visibility.

[0050] As described above, in the vehicle lighting device 1, in the light guide 8, at least a part of the light incident portion 24 is curved, the light emission portion 23 guides light in both directions along the longitudinal direction, and the light passing portion 25 has a diffusion function and is formed in a flat plate shape, so that light incident on the light incident portion 24 passes through the light passing portion 25 and is incident on the light emission portion 23.

[0051] Therefore, since the light emitted from the first light source 36 and the second light source 37 is diffused through the light incident section 24 and the light passing section 25 before being incident on the light emission section 23, the uniformity of the light emitted from the light emission section 23 can be improved.

[0052] Furthermore, the light incident portion 24 is formed in a line-symmetric shape, and the light passing portion 25 is continuous with the central part of the light incident portion 24 in the longitudinal direction.

[0053] Therefore, since the light P1 incident from the first incident surface 31a and heading toward the light emission section 23 and the light P2 incident from the second incident surface 31b and heading toward the light emission section 23 travel along symmetrical paths, uniform light is more easily incident on each part of the light emission section 23, and the light emitted from the light emission section 23 can be made even more uniform.

[0054] Furthermore, the width H of the light-transmitting portion 25 of the light guide 8 increases as it approaches the light-emitting portion 23 from the light-incident portion 24.

[0055] Therefore, as light passes through the light-passing section 25 and travels from the light-incident section 24 to the light-emitting section 23, it is more likely to spread out in the width direction of the light-passing section 25. This increases the diffuseness of the light incident on the light-emitting section 23, and further uniformity of the light emitted from the light-emitting section 23 can be achieved.

[0056] Furthermore, the thickness T of the light-transmitting portion 25 is made smaller than the dimensions (width S1 and width S2) in the same direction as the thickness direction of the light-transmitting portion 25 in the light-incident portion 24 and the light-emitting portion 23.

[0057] Therefore, as the thickness of the light-transmitting portion 25 is reduced, the number of times light is reflected internally on both sides in the thickness direction of the light-transmitting portion 25 increases, and the light is incident on the light-emitting portion 23 in a state where it is easy to mix, thereby further improving the uniformity of the light incident from the light-emitting portion 23.

[0058] Furthermore, the light incident portion 24 has a connecting portion 29 that is continuous with the light passing portion 25, a pair of first curved portions 30 that are continuous with both ends of the connecting portion 29 in the longitudinal direction, and a pair of second curved portions 31 that are each continuous with the pair of first curved portions 30, the pair of first curved portions 30 are formed in a convex shape in opposite directions, and the curvature directions of the first curved portions 30 and the second curved portions 31 are opposite.

[0059] Therefore, it becomes possible to increase the length of the connecting portion 29, and it becomes easier to form the pair of second curved portions 31 in a parallel state, thereby increasing the amount of light incident from the light incident portion 24 to the light passing portion 25, and it becomes easy to set the orientation of the first incident surface 31a and the second incident surface 31b with respect to the first light source 36 and the second light source 37.

[0060] Furthermore, since the pair of first curved portions 30 are formed in a convex shape in opposite directions, and the curvature directions of the first curved portion 30 and the second curved portion 31 are opposite, it becomes easier to form the pair of second curved portions 31 in a parallel state and to position them close together, so that the first light source 36 and the second light source 37 can be brought closer together and the substrate 35 can be miniaturized.

[0061] Furthermore, since the pair of second curved portions 31 are easily formed in a parallel state, it becomes easier to position the first light source 36 and the second light source 37 mounted on the flat substrate 35 so that they face the first incident surface 31a and the second incident surface 31b, respectively, thereby improving the incident efficiency of the light emitted from the first light source 36 and the second light source 37 to the light guide 8.

[0062] Furthermore, the light-emitting section 23 is formed in an annular shape, and the light-ingress section 24 and the light-passing section 25 are located inside the light-emitting section 23.

[0063] Therefore, since the light incident section 24 and the light passing section 25 are not located outside the light emitting section 23, the external shape of the light guide 8 can be reduced, and the vehicle lighting fixture 1 can be miniaturized.

[0064] Furthermore, in the vehicle lighting fixture 1, other lamp units such as stop lamps other than the lamp unit 6 may be arranged in the space inside the holder 7. By arranging other lamp units other than the lamp unit 6 in the space inside the holder 7, functionality can be improved without increasing the size of the vehicle lighting fixture 1. [Explanation of symbols]

[0065] 1. Vehicle lighting fixtures 7 Holder 8 Light guide 9. Shielding cover 23 Light-emitting section 23a Control step 23b Output surface 24 Light incidence section 25 Light passage section 30 First curved section 31 Second curved section 31a First incident plane 31b Second incident surface 36. First light source 37. Second light source

Claims

1. A first light source that emits light, A second light source that emits light, The system comprises a first light source and a light guide that guides the light emitted from the second light source and emits the guided light, The light guide has a light ingress portion, a light emission portion, and a light passage portion. The light incident portion is provided with at least a portion as a curved portion and is formed in a shape having a longitudinal direction, with one end face in the longitudinal direction formed as a first incident surface facing the first light source and the other end face in the longitudinal direction formed as a second incident surface facing the second light source. The light-emitting section is formed in a shape having a longitudinal direction and has an emitting surface that guides light in both directions along the longitudinal direction and emits the guided light. The light-transmitting portion has a light-diffusing function, is formed in a flat plate shape, is located between the light-incident portion and the light-emitting portion, and is continuous with the intermediate portion in the longitudinal direction of the light-incident portion and the intermediate portion in the longitudinal direction of the light-emitting portion. Light emitted from the first light source and the second light source and incident on the light incident section passes through the light passage section and is incident on the light output section. Vehicle lighting fixtures.

2. The light incident portion is formed in a line-symmetric shape, The light-transmitting portion is continuous with the central part in the longitudinal direction of the light-incident portion. A vehicle light fixture according to claim 1.

3. The light-transmitting portion is oriented perpendicular to the thickness direction and perpendicular to the direction connecting the light-incident portion and the light-emitting portion in the width direction. The width of the light-transmitting portion is increased as it approaches the light-emitting portion from the light-injecting portion. A vehicle light fixture according to claim 1 or claim 2.

4. The thickness of the light-transmitting portion is made smaller than the size in the same direction as the thickness direction of the light-transmitting portion in the light-injecting portion and the light-emitting portion. A vehicle light fixture according to claim 1 or claim 2.

5. The light incident portion has a connecting portion continuous with the light passing portion, a pair of first curved portions continuous with both ends in the longitudinal direction of the connecting portion, and a pair of second curved portions continuous with each of the pair of first curved portions. The pair of the first curved portions are formed in a convex shape in opposite directions. The curvature directions of the first curved portion and the second curved portion are in opposite directions. A vehicle light fixture according to claim 1 or claim 2.

6. The light-emitting portion is formed in an annular shape, The light incident portion and the light passing portion are located inside the light emission portion. A vehicle light fixture according to claim 1 or claim 2.

7. A shielding cover is provided to block the light incident portion and the light passing portion. A holder for holding the light guide is provided. The light guide is sandwiched between the shielding cover and the holder, and the shielding cover is attached to the holder. A vehicle light fixture according to claim 1 or claim 2.

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