Lighting system for vehicle

Abstract

To provide a lighting system for a vehicle that can light up evenly in a longitudinal direction, while tightly fixing a light guiding bar to a light-transmitting member.SOLUTION: A lighting system for a vehicle comprises: a light source 20; a light guiding bar 22 that makes a light emitting surface 22c disposed along a longitudinal direction emit light, while guiding light of the light source 20 emitted from one end 22a to the other end 20b; and a light-transmitting member 24, formed in a longitudinal shape extending along the light guiding bar 22, which stores the light guiding bar 22 in a groove part 40 formed along the longitudinal direction and transmits light emitted from a light emission surface 22c toward a vehicle interior. The light guiding bar 22 has a protruding part 60 extended in the longitudinal direction to protrude from a body part. The light-transmitting member 24 has a recessed part 54 with which the protruding part 60 is engaged, where the other end portion 60a of the protruding part which is a portion at the other end side in the protruding part 60 is formed so that protrusions δ thereof gradually reduce as going toward the other end 22a.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] An example of a vehicle lighting device is described in the following Patent Document 1. The vehicle lighting device described in the following Patent Document 1 includes a light source, a light guide member that guides light incident from one end in the longitudinal direction to the other end and emits light from a light emission surface formed along the longitudinal direction, and a lens (light-transmitting member) that is elongated and extends along the light guide member, accommodates a light guide rod in a groove formed along the longitudinal direction, and transmits light emitted from the light emission surface to the vehicle compartment. The vehicle lighting device described in the following Patent Document 1 is configured such that a pair of wall portions forming the groove portion in the lens are elastically deformed to approach each other, and a pair of engagement portions formed in the portions are engaged with a pair of engaged portions provided on the vehicle member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6952224 Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle lighting device described in Patent Document 1, the light guide member is merely accommodated in a groove portion relative to the lens and is not fixed thereto, so there is a risk of abnormal noise due to rattling. On the other hand, there is a configuration in which a convex portion is provided on the light guide rod and a concave portion is provided on the lens (translucent member) to fix the light guide member (light guide rod) to the lens (translucent member), and these are engaged with each other. However, a vehicle lighting device having such a configuration has a problem in that, by providing a convex portion on the light guide rod, light is concentrated within the convex portion, and the light emitted from the vicinity of the convex portion becomes brighter than the light emitted from other parts.

[0005] The present invention has been made in consideration of such circumstances, and its object is to provide a vehicle lighting device that firmly fixes the light guide rod to the light-transmitting member while homogenizing the light in the longitudinal direction. [Means for solving the problem]

[0006] In order to solve the above problems, the vehicle lighting device disclosed in the present application has the following configuration. (1) a light source; A light guide rod having a longitudinal shape, into which light from the light source is incident from one end in the longitudinal direction, and which guides the incident light to the other end and emits the light from a light exit surface formed along the longitudinal direction; a light-transmitting member having a longitudinal shape extending along the light guide rod, accommodating the light guide rod in a groove portion formed along the longitudinal direction, and transmitting the light emitted from the light exit surface to the vehicle interior; Equipped with The light guide rod has a main body and a protrusion extending in the longitudinal direction and protruding from the main body, the light-transmitting member has a recess for engaging the protrusion, The other end of the protrusion, which is a portion of the protrusion on the other end side, is shaped so that the amount of protrusion gradually decreases toward the other end.

[0007] The vehicle lighting device disclosed in the present application can firmly fix the light guide rod to the light-transmitting member by engaging the convex portion of the light guide rod with the concave portion of the light-transmitting member. The convex portion is a portion that protrudes outward from the main body, and in the past, a convex portion was formed with a certain width in the longitudinal direction and a shape that protrudes in a direction perpendicular to the longitudinal direction, that is, a generally rectangular convex portion. With a convex portion of such a shape, a surface facing the light source is formed on the convex portion, and light leaks out from the surface facing the light source, or light is reflected toward the light source and collected on the convex portion, causing a problem that the light emitted from the vicinity of the convex portion is brighter than the light emitted from other portions. In contrast, the vehicle lighting device disclosed in the present application has a shape in which the other end side of the convex portion gradually decreases in protrusion amount toward the other end side, for example a tapered shape, so that the interface on the other end side of the convex portion can reflect light toward the other end side. In other words, it is possible to prevent light from leaking out from the protrusions or being reflected toward the light source, and to prevent the vicinity of the protrusions from becoming bright. Therefore, the vehicle lighting device disclosed in the present application can achieve uniformity in the longitudinal direction of the light transmitted from the light-transmitting member to the vehicle compartment.

[0008] In the vehicle lighting device disclosed in the present application, the term "gradual decrease" means a continuous (gradual) decrease without a stepwise decrease, and the "convex portion" in the vehicle lighting device disclosed in the present application can have a shape in which its edge approaches the main body portion smoothly from the tip in a straight or curved shape without any steps.

[0009] The vehicle lighting device having the above-mentioned configuration can be embodied in various forms as shown below. Note that the present invention is not limited to the following forms, and can be embodied in various forms that are modified and improved based on the knowledge of those skilled in the art.

[0010] (2) In a planar view including the longitudinal direction and the direction in which the convex portion protrudes, the other end of the convex portion is shaped so that the angle between the direction in which the outer edge extends and the axis of the light guiding rod is greater than or equal to 10° and less than or equal to 45°.

[0011] In the vehicle lighting device of this configuration, the shape of the outer edge of the other end of the convex portion is within the above angle range, so that the angle of incidence of light on the interface of the light guiding rod becomes obtuse, preventing the light from escaping from the interface to the outside or being reflected toward the light source, and the light from the light source can be reliably guided to the other end. In addition, the angle between the extending direction of the outer edge and the axis of the light guiding rod is 10° or more, so that the convex portion and the concave portion can be sufficiently engaged, and the light guiding rod can be firmly fixed to the light-transmitting member.

[0012] (3) The vehicle lighting device described in (1) or (2) in which the convex portion is formed in a mountain shape when viewed from the inside and outside of the vehicle, so that the other end of the convex portion is shaped so that the amount of protrusion gradually decreases as it approaches the other end, and the one end of the convex portion, which is the portion of the convex portion toward the one end from the tip, is also shaped so that the amount of protrusion gradually decreases as it approaches the one end.

[0013] In a vehicle lighting device of this configuration, since there are no sharp angles in the entire convex portion, light from the light source can be transmitted smoothly from one end to the other end, which effectively prevents light from concentrating in the convex portion and more reliably uniforms the light in the longitudinal direction.

[0014] (4) The main body of the light guide rod is an opposing surface that is a surface opposite to the light exit surface and has a plurality of prisms arranged in the longitudinal direction that refract light toward the light exit surface; a pair of side wall surfaces connecting the light exit surface and the opposing surface; Equipped with The vehicle lighting device according to any one of (1) to (3), wherein the protrusions are formed on the pair of side wall surfaces.

[0015] In the vehicle lighting device having this configuration, the positions of the convex portions are specified, and the concave portions are formed in the portions of the light-transmitting member that form the side walls of the groove portions, and the convex portions and the concave portions engage with each other. In the vehicle lighting device having this configuration, the convex portions do not impede the progression of light from the prism to the light exit surface, and the light is made uniform in the longitudinal direction.

[0016] (5) The vehicle lighting device according to (4), wherein the protrusion has a shape such that a dimension in a vehicle interior / exterior direction becomes smaller toward the tip side.

[0017] In the vehicle lighting device having this configuration, when the light guiding rod is assembled to the light-transmitting member, the convex portion has a shape that tapers in the assembly direction, so that assembly can be easily performed. Effect of the Invention

[0018] According to the present invention, it is possible to provide a vehicle lighting device in which the light guiding rod is firmly fixed to the light-transmitting member while achieving uniform light in the longitudinal direction. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a front view of a door trim provided with a vehicle lighting device according to a first embodiment of the present invention; [Diagram 2] FIG. 1 is an overall view of a vehicle lighting device according to a first embodiment; [Diagram 3] 2 is a cross-sectional view of the vehicle lighting device according to the first embodiment (cross-section AA in FIG. 2). [Figure 4] FIG. 1 is a plan view showing a main part of a vehicle lighting device according to a first embodiment, as viewed from the outside of a vehicle; [Diagram 5] 1 is a side view of a main part of a vehicle lighting device according to a first embodiment of the present invention; [Figure 6] FIG. 1 is a plan view showing a main part of a light guide rod; [Figure 7] 2 is a cross-sectional view of a main part of the vehicle lighting device according to the first embodiment (cross-section BB in FIG. 2). [Figure 8] Graph showing luminance of the vehicle lighting device of the first embodiment. [Figure 9] FIG. 11 is a plan view showing a main part of a vehicle lighting device according to a second embodiment as viewed from the outside of a vehicle; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] First Embodiment A vehicle lighting device 10 (hereinafter, may be simply referred to as "lighting device 10") according to a first embodiment in which a vehicle lighting structure of the present invention is adopted will be described with reference to Figs. 1 to 8. As shown in Fig. 1, the lighting device 10 is provided on a door trim 12 of a side door of a vehicle, and is a line light that emits light in a line shape. Note that in some of the drawings, directions are indicated using the symbols Fr, Rr, IN, OUT, U, and D, which respectively indicate the front side, rear side, inside of the passenger compartment (vehicle compartment) in the vehicle width direction, outside of the passenger compartment, upper side, and lower side of the vehicle.

[0021] The door trim 12 is mainly composed of a generally plate-shaped trim board 14. The trim board 14 is formed by assembling a plurality of board members together. Specifically, the trim board 14 includes an upper board 15, an armrest board 16, a lower board 17, and the like.

[0022] The upper board 15 constitutes the upper part of the trim board 14, and its lower end is connected to the lower board 17 at its front portion and to the armrest board 16 at its rear portion. The lighting device 10 of this embodiment is disposed on the upper board 15. More specifically, the upper board 15 is formed with a long hole 15a that extends in a curved shape from its front upper end rearward and downward, and the lighting device 10 of this embodiment emits light from the long hole 15a toward the interior of the vehicle cabin.

[0023] 2, the lighting device 10 of this embodiment includes a light source unit 20, a longitudinal light guiding rod 22 that guides light from the light source unit 20, and a lens member (light-transmitting member) 24 that transmits and diffuses the light emitted from the light guiding rod 22 toward the inside of the vehicle cabin. The lighting device 10 is formed by assembling and integrating the light source unit 20, the light guiding rod 22, and the lens member 24, and is fixed to the exterior side of the upper board 15 in this integrated state.

[0024] Although detailed description is omitted, the light source unit 20 is provided at one end 22a (the rear end, the end on the right side in Figs. 1 and 2) of the light guide rod 22. The light source unit 20 includes an LED, which is a point light source, and a case having a light-shielding property for accommodating the LED. The case holds the light guide rod 22 with one end thereof facing the LED, and the light source unit 20 receives light from the one end 22a of the light guide rod 22. As will be described in detail later, the light guide rod 22 guides light from the one end 22a toward the other end 22b, and emits light from a light emission surface 22c formed along the longitudinal direction. The lens member 24 has a longitudinal shape extending along the light guide rod 22 and is shaped to cover the light emission surface 22c, and transmits the light emitted from the light emission surface 22c of the light guide rod 22 to the vehicle interior side (vehicle compartment side).

[0025] The light guide rod 22 is made of a synthetic resin material that has a refractive index sufficiently higher than that of air and is almost transparent. In this embodiment, the light guide rod 22 is made of acrylic resin with a critical angle of about 42.2°. The light guide rod 22 is configured such that when light traveling inside the rod is incident on the interface with the external air layer at an incident angle larger than the critical angle, the light is totally reflected and propagates inside the rod.

[0026] As shown in FIG. 3, the cross-sectional shape of the light guide rod 22 in the extension direction (longitudinal direction) is flat on the outdoor side and arc-shaped on the indoor side. As shown in FIG. 3 to FIG. 5, a plurality of prisms 30 are arranged in the longitudinal direction on the outdoor side 22d (corresponding to the surface facing the light exit surface) of the light guide rod 22. The plurality of prisms 30 extend in a direction intersecting the longitudinal direction and have a mountain-shaped cross section. The light guide rod 22 is configured such that the light propagating inside is raised toward the arc-shaped light exit surface 22c on the indoor side by the plurality of prisms 30, in other words, at an angle smaller than the critical angle with respect to the light exit surface 22c. The raised light is then emitted from the light exit surface 22c and enters the inside of the lens member 24. Incidentally, at the outdoor end of the light guide rod 22, in other words, on each of a pair of side wall surfaces 22e connecting the light exit surface 22c and the opposing surface 22d, a flange portion 32 protruding in its width direction (up and down direction) is formed.

[0027] The lens member 24 has a groove 40 that extends along the longitudinal direction and opens to the outside of the vehicle. The inner surface of the groove 40 is formed in an arc shape, and the cross-sectional shape of the groove 40 faces the light exit surface 22c of the light guide rod 22, so that the light exiting from the light exit surface 22c is efficiently incident to the inside of the vehicle. The lens member 24 has a protrusion 42 that protrudes from the surface on the interior side toward the interior side of the vehicle and extends along the longitudinal direction. The protrusion 42 is a portion that fits into the long hole 15a of the upper board 15, and as shown in FIG. 1, the end surface 42a on the interior side of the protrusion 42 is configured to appear on the design surface of the door trim 12, and light is exited from the end surface 42a toward the vehicle interior. The lens member 24 is made of a resin that can transmit the light exiting from the light guide rod 22, and in this embodiment, it is made of polycarbonate. In addition, the lens member 24 is milky white in color so that the prism 30 of the light guiding rod 22 and the like cannot be seen by the occupant through the lens member 24.

[0028] Next, the mounting structure of the light guide rod 22 and the lens member 24, which is a feature of the lighting device 10 of this embodiment, will be described with reference to Figs. 4 to 7. The lens member 24 is provided with a plurality of mounting parts 50 for mounting the light guide rod 22 at a predetermined interval in the longitudinal direction (see Fig. 1). The mounting parts 50 are provided on a pair of side wall parts 52 forming a pair of side wall surfaces facing each other in the width direction (up and down direction) on the inner surface of the groove part 40, and are gate-shaped protruding from the side wall parts 52 to the outside of the room. In other words, the mounting parts 50 form a generally rectangular through hole (recess) 54 penetrating in the width direction between the ends of the side wall parts 52.

[0029] On the other hand, the light guide rod 22 has a protrusion 60 that fits into the through hole 54 corresponding to each of the above-mentioned multiple mounting parts 50. This protrusion 60 is formed on the flange part 32. More specifically, the outer edge of the flange part 32 in the width direction is formed almost parallel to the axis L0 of the light guide rod 22, and the protrusion 60 corresponds to a part that protrudes in the width direction from a line L1 parallel to the axis. As shown in Figs. 4 and 6, this protrusion 60 has a shape that generally bulges out in a gentle mountain shape when viewed from the outside of the room. That is, the protrusion 60 has a shape in which the protrusion amount δ of the protrusion other end 60a, which is the part on the other end 22b side opposite to the light source unit 20, gradually decreases toward the other end 22b, and the protrusion one end 60b, which is the part on the light source unit 20 side (the one end 22a side), gradually decreases toward the one end 22a. More specifically, as shown in Fig. 6, when viewed from the outside of the room, the other end 60a of the convex portion is formed such that the angle θ between the direction L2 in which the outer edge extends and the axis L0 of the light guiding rod 22 is 10° or more and 45° or less. In this embodiment, the angle θ is set to about 13°. Similarly, the one end 60b of the convex portion is formed such that the angle between the direction in which the outer edge extends and the axis L0 of the light guiding rod 22 is the same angle as that on the other end 60a of the convex portion.

[0030] When attaching the light guide rod 22 to the lens member 24, the light guide rod 22 is inserted from the opening direction of the groove portion 40 of the lens member 24 (the left side in Figs. 5 and 7). At this time, the pair of protrusions 60 are elastically deformed so as to widen the gap between the pair of mounting portions 50, and the tips of the protrusions 60 enter the through holes 54. In addition, when the tips of the protrusions 60 enter the through holes 54, as shown in Fig. 5, the tips 52a (the left end in Fig. 5) of the side wall portions 52 of the lens member 24 contact the interior side (right side) 32a of the flange portion 32 of the light guide rod 22 on both sides in the longitudinal direction of the mounting portion 50. In other words, the flange portions 60 of the light guide rod 22 are clamped by using the mounting portions 50, and the position of the light guide rod 22 in the interior and exterior directions is determined relative to the lens member 24. Incidentally, the longitudinal position of the light guide rod 22 relative to the lens member 24 is determined by an engagement portion provided separately from the above-mentioned portion.

[0031] 7, the protrusion 60 has a shape in which the exterior side surface is inclined downward toward the tip side. This makes it easy to fit the protrusion 60 into the through-hole 54, and when fitted, the edge of the through-hole 54 reliably abuts somewhere on the inclined surface of the protrusion 60, allowing the lens member 24 to firmly fix the light guiding rod 22.

[0032] In the conventional lighting device, the convex portion of the light guide rod may have a certain width in the longitudinal direction and may protrude in a direction perpendicular to the longitudinal direction, i.e., a generally rectangular convex portion may be formed. In the case of a convex portion having such a shape, a surface facing the light source side is formed in the convex portion, so that the light emitted from the vicinity of the convex portion may be brighter than the light emitted from other parts, due to the fact that the light leaks out from the surface facing the light source side or is reflected toward the light source side and collected in the convex portion. In contrast, in the lighting device 10 of the present embodiment, the portion 60a on the other end side of the convex portion 60 of the light guide rod 22 is shaped so that the protrusion amount δ gradually decreases toward the other end 22a, so that the interface of the other end 60a of the convex portion may reflect light toward the other end 22b side. In other words, it is possible to suppress the light leaking out from the convex portion 60 or the light being reflected toward the light source unit 20 side, and to suppress the light emitted from the vicinity of the convex portion 60 toward the room side from becoming brighter. Fig. 8 compares the luminance in the vicinity of the convex portion 60 provided on the light guiding rod 22 in the lighting device 10 of this embodiment with the luminance in the lighting device of the conventional configuration described above. As can be seen from Fig. 8, it can be confirmed that the luminance in the vicinity of the convex portion can be significantly reduced. As described above, the lighting device 10 of this embodiment achieves uniformity in the longitudinal direction of the light transmitted from the lens member 24 to the vehicle interior side.

[0033] In addition, in the lighting device 10 of this embodiment, in a plan view (viewpoint from the outside of the room) including the longitudinal direction and the direction in which the convex portion 60 protrudes, the other end 60a of the convex portion is shaped such that the angle θ between the direction L2 in which the outer edge extends and the axis L0 of the light guiding rod 22 is 10° or more and 45° or less. As a result, the shape of the outer edge of the other end 60a of the convex portion is within this angle range, so that the angle of incidence of light on the interface of the light guiding rod 22 becomes large, and it is possible to prevent the light from escaping to the outside from the interface or being reflected toward the light source unit 20, and the light from the light source unit 20 can be reliably guided to the other end 22b. In addition, the angle between the direction L2 in which the outer edge extends and the axis L0 of the light guiding rod 22 is 10° or more, so that the convex portion 60 and the through hole (recess) 54 can be sufficiently engaged, and the light guiding rod 22 can be firmly fixed to the lens member 24.

[0034] In addition, in the lighting device 10 of this embodiment, the convex portions 60 are formed on a pair of side wall surfaces 22e connecting the light exit surface 22c and the opposing surface 22d of the light guiding bar 22. As a result, the convex portions 60 do not impede the progress of light from the prism 30 toward the light exit surface 22c, and the light is made uniform in the longitudinal direction.

[0035] <Embodiment 2> In the lighting device 10 of the above embodiment, the convex portion 60 of the light guiding bar 22 is generally mountain-shaped in plan view, and the convex portion one end 60b is shaped so that the protruding amount gradually decreases toward the one end side, like the convex portion other end 60a, but the shape in which the protruding amount gradually decreases toward the one end side is not essential. For example, as in the lighting device 100 of the second embodiment shown in FIG. 9, the convex portion 104 of the light guiding bar 102 can be formed. That is, the convex portion 104 of the light guiding bar 102 has a shape in which the part 104a on the other end side is the same shape as the convex portion other end 60a of the first embodiment, while the outer edge of the part 104b on the one end side is shaped so as to extend in a direction perpendicular to the main body 106 (line L1). Therefore, the outer edge (interface) of the convex portion one end 104b does not form a surface facing the traveling direction of light, and therefore does not have a significant effect on the traveling of light toward the other end side. On the other hand, it is possible to sufficiently engage with the recess 112 of the lens member 110 , and the light guiding rod 102 can be firmly fixed to the lens member 110 .

[0036] <Other embodiments> The present invention is not limited to the above-described embodiment, and can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art. For example, the following embodiments are also included within the technical scope of the present invention.

[0037] In the above two embodiments, the outer edge of the other end 60a of the convex portion is generally linear, and the vicinity of the tip of the convex portion 60 and the joint portion with the main body are curved, but the shape is not limited to this. For example, the entire other end 60a of the convex portion may be curved. That is, the other end of the convex portion may be configured such that the angle of the outer edge of the other end of the convex portion with respect to the axis L0 of the light guiding rod changes within 45°. In this case, it is desirable that the largest angle is 10° or more in order to fully engage with the recess. In addition, when the outer edge is linear, the angle may change midway.

[0038] In the above embodiment, the cross-sectional shape of the light guiding rod 22 in the extending direction is flat on the outside and arc-shaped on the inside, but is not limited thereto. The light guiding rod (specifically, the main body of the light guiding rod) may have, for example, a substantially circular cross-section or a rectangular cross-section. The light-transmitting member (specifically, the groove) may have any shape that can accommodate the light guiding rod. The protruding portion of the light guiding rod may be located in a position that does not obstruct the progress of light toward the light exit surface inside, and the position and protruding angle with respect to the main body may be adjusted in relation to the light-transmitting member.

[0039] In the above embodiment, a vehicle lighting device 10 provided on a side door of an automobile has been given as an example of a vehicle lighting device, however, the technology disclosed in the present application is not limited to this, and can be applied to line lighting provided on vehicle interior materials such as various trims other than door trims, instrument panels, console boxes, dashboards, as well as line lighting provided on vehicle interior materials such as trains, airplanes, ships, etc. [Explanation of symbols]

[0040] 10...vehicle lighting device (vehicle lighting device), 20...light source unit, 22...light guide rod, 22a...one end, 22b...other end, 22c...light exit surface, 22d...outdoor surface (opposing surface), 22e...side wall surface, 24...lens member, 40...groove portion, 54...through hole (recess), 60...convex portion, 60a...other end of convex portion, 60b...one end of convex portion, 100...vehicle lighting device, 102...light guide rod, 104...convex portion, 104a...other end of convex portion, 104b...one end of convex portion, 106...main body, 110...lens member (translucent member), 112...recess

Claims

1. A light source; A light guide rod having a longitudinal shape, into which light from the light source is incident from one end in the longitudinal direction, and which guides the incident light to the other end and emits the light from a light exit surface formed along the longitudinal direction; a light-transmitting member having a longitudinal shape extending along the light guide rod, accommodating the light guide rod in a groove portion formed along the longitudinal direction, and transmitting the light emitted from the light exit surface to the vehicle interior; Equipped with The light guide rod has a main body and a protrusion extending in the longitudinal direction and protruding from the main body, the light-transmitting member has a recess for engaging the protrusion, The other end of the protrusion, which is a portion of the protrusion on the other end side, is shaped so that the amount of protrusion gradually decreases toward the other end.

2. 2. The vehicle lighting device of claim 1, wherein, in a planar view including the longitudinal direction and the direction in which the convex portion protrudes, the other end of the convex portion is shaped so that an angle between the direction in which the outer edge extends and the axis of the light guiding rod is 10° or more and 45° or less.

3. The vehicle lighting device according to claim 1 or 2, wherein the convex portion is formed in a mountain shape when viewed from the inside and outside of the vehicle, so that the other end of the convex portion is shaped so that the amount of protrusion gradually decreases as it approaches the other end, and the one end of the convex portion, which is the portion of the convex portion toward the one end from the tip, is also shaped so that the amount of protrusion gradually decreases as it approaches the one end.

4. The main body of the light guiding rod is an opposing surface that is a surface opposite to the light exit surface and has a plurality of prisms arranged in the longitudinal direction that refract light toward the light exit surface; a pair of side wall surfaces connecting the light exit surface and the opposing surface; Equipped with The vehicle lighting device according to claim 1 or 2, wherein the protrusions are formed on the pair of side wall surfaces.

5. 5. The vehicle lighting device according to claim 4, wherein the projection has a shape in which a dimension in a vehicle interior / exterior direction decreases toward a tip end side.

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