JP7239244B2 - vehicle lamp - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp capable of suppressing lighting generated at the other end of a light guide.

FIG. 13 is a front view of a conventional light guide including a rod-shaped light guide and a plate-shaped light guide.

Conventionally, as shown in FIG. 13, two rod-shaped light guides 110A and 110B arranged in parallel with a space therebetween and side surfaces (peripheral surfaces) of the two rod-shaped light guides 110A and 110B facing each other A vehicle lamp including a light guide body 100 including a plate-shaped light guide portion 120 to be connected has been proposed (see, for example, Patent Document 1 (FIGS. 1, 2, etc.)).

In the vehicle lamp described in Patent Document 1, light from a light source (not shown) enters the light guide body 100 through one ends 111A and 111B of the rod-shaped light guide parts 110A and 110B, respectively. The light is guided through 100 and emitted from the front surfaces 112A and 112B (the front surfaces of the outer peripheral surfaces) of rod-shaped light guide portions 110A and 110B and the front surface 121 of plate-shaped light guide portion 120, respectively. Thereby, each of the rod-shaped light guides 110A and 110B and the plate-shaped light guide 120 emits light.

JP 2014-116142 A

However, as a result of studies by the present inventors, in the vehicle lamp described in Patent Document 1, the other end 101 of the light guide 100 (for example, the other end 113A of each of the rod-shaped light guides 110A and 110B, 113B).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle lamp capable of suppressing flashing generated at the other end of a light guide.

In order to achieve the above object, one aspect of the present invention provides a lamp case, a light guide arranged in the lamp case, a light source emitting light guided in the light guide, and a reflective surface that diffusely reflects light emitted from the light guide, the light guide including a front surface arranged on the front side and a rear surface arranged on the opposite side of the rear surface, and one end portion and the light source extends from one end of the light guide toward the other end of the light guide, and the light source enters the light guide from one end of the light guide and directs the light toward the other end of the light guide. The light guide is guided through the light guide and emits light emitted from the front surface of the light guide, and the light guide is further guided through the light guide to the other end of the light guide. A terminal portion for emitting the light from the light source that has reached the lamp case as diffused light is included. Light from the light source that has reached the other end of the light guide, which includes a first surface facing the inner surface and a second surface on the opposite side, enters the terminal portion and enters the terminal portion. Light is guided through the terminal portion toward the distal end portion, and the first surface includes a plurality of structures for diffusing light from the light source guided through the terminal portion and emitted from the second surface. and the reflecting surface is arranged with the first surface of the terminal end facing each other, and diffuses the light emitted from the first surface of the terminal end, out of the light from the light source guided in the terminal end. It is characterized by reflection .

According to this aspect, it is possible to provide a vehicle lamp capable of suppressing flashing generated at the other end of the light guide.

This is because the light that causes point light, that is, the light from the light source reaching the other end of the light guide is diffused by the end.

In a preferred aspect of the above invention, the light guide further includes a first fixing portion provided at one end of the light guide and fixed to the lamp case; a second fixing part provided and fixed to the lamp case, wherein the second fixing part extends rearward from the other end of the light guide.

According to this aspect, it is possible to provide a vehicular lamp capable of suppressing flashing generated at the other end portion (for example, the second fixing portion) of the light guide.

In the above-described invention, a preferred mode further comprises a reflecting surface, and the reflecting surface is arranged in a state in which the first surfaces of the terminal portion face each other.

According to this aspect, the reflective surface that emits light by reflecting the light that leaks backward from the terminal portion behind the terminal portion that emits surface light is visually recognized, realizing a three-dimensional light emission appearance with a sense of depth. can do.

In the above invention, a preferred aspect is that the light guide includes a rod-shaped light guide portion including a front surface arranged on the front side and a rear surface arranged on the opposite side of the back surface, and a light guide portion arranged on the front side. and at least one of a plate-shaped light guide including a front surface arranged on the opposite side of the front surface and a rear surface arranged on the opposite side of the rear surface.

According to this aspect, there is provided a vehicular lamp capable of suppressing flashing generated at the other end of the light guide (the light guide including at least one of the rod-shaped light guide and the plate-shaped light guide). can do.

1 is a perspective view of a vehicle lamp 10; FIG. 1 is a front view of a vehicle lamp 10; FIG. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2; (a) BB cross-sectional view of FIG. 2, (b) CC cross-sectional view of FIG. FIG. 3 is a cross-sectional view along DD of FIG. 2 (the second light guide 40B, the first light source module 50A, and the inner lens 60 are omitted). 1 is an exploded perspective view of a vehicle lamp 10; FIG. (a) A front view of the first light guide 40A, (b) a rear view. FIG. 11 is a cross-sectional view of a modified example of the rod-shaped light guide portion 42; 4 is a perspective view of the reflector 30 with the first light guide 40A arranged in the first space S1a. FIG. It is a front view of the 2nd light guide 40B. 4 is an optical path diagram of light RayA from the first light source module 50A; FIG. 6A is a cross-sectional view of the circled range in FIG. 5 taken along the XY plane, and FIG. 5B is a cross-sectional view of the circled range taken along the YZ plane. FIG. 4 is a front view of a conventional light guide including a rod-shaped light guide and a plate-shaped light guide;

A vehicle lamp 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The same reference numerals are given to corresponding components in each figure, and duplicate descriptions are omitted.

FIG. 1 is a perspective view of a vehicle lamp 10. FIG.

A vehicle lamp 10 shown in FIG. 1 is a vehicle signal lamp that functions as a tail lamp. The vehicle lamp 10 is mounted on both left and right sides of a rear end portion of a vehicle (not shown) such as an automobile. Since the vehicle lamps 10 mounted on both the left and right sides have a symmetrical configuration, the vehicle lamp 10 mounted on the left side of the rear end portion of the vehicle (the left side when facing the front of the vehicle) will be described below as a representative. do. Hereinafter, for convenience of explanation, the term "front" is used to mean the rear of the vehicle, and the term "rear" is used to mean the front of the vehicle. For convenience of explanation, the XYZ axes are defined below. The X-axis extends in the vehicle front-rear direction, the Y-axis extends in the vehicle width direction, and the Z-axis extends in the vertical direction.

2 is a front view of the vehicle lamp 10, FIG. 3 is a cross-sectional view along AA in FIG. 2, FIG. 4A is a cross-sectional view along B-B in FIG. 2, and FIG. 4B is a cross-sectional view along C-C in FIG. 5 is a cross-sectional view taken along line DD of FIG. 2 (the second light guide 40B, first light source module 50A, and inner lens 60 are omitted), and FIG. 6 is an exploded perspective view of the vehicle lamp 10. FIG.

As shown in FIGS. 2 to 6, the vehicle lamp 10 includes a reflector 30, a first light guide 40A, a second light guide 40B, a first light source module 50A, a second light source module 50B, an inner lens 60, and the like. Prepare. The vehicle lamp 10 is arranged in a lamp chamber constituted by an outer lens (not shown) and a housing 70 (see FIG. 6) and fixed to the housing.

As shown in FIG. 2, the vehicle lamp 10 includes first to third rod-shaped light guides 42A to 42C. The first to third rod-shaped light guides 42A to 42C respectively form rod-shaped light emitting regions. The first to third rod-shaped light guides 42A to 42C have the same configuration. Hereinafter, the first to third rod-shaped light guides 42A to 42C will be referred to as rod-shaped light guides 42 when not distinguished.

The vehicle lamp 10 also includes first to fifth plate-shaped light guide portions 41A to 41E. The first to fifth plate-shaped light guide portions 41A to 41E form planar light emitting regions, respectively. The first to fifth plate-shaped light guide portions 41A to 41E have the same configuration. Hereinafter, the first to fifth plate-shaped light guides 41A to 41E are referred to as plate-shaped light guides 41 when not distinguished.

The relationship between the rod-shaped light guide portion 42 (diameter) and the plate-shaped light guide portion 41 (thickness) is: rod-shaped light guide portion 42 (diameter: 8 mm, for example)>plate-shaped light guide portion 42 (thickness: 2 mm, for example). be.

As shown in FIGS. 2 and 6, the reflector 30 is a lamp case having a T-shaped open end 32a including a curved portion 32a1 on the front side. The material of the reflector 30 is, for example, synthetic resin such as acrylic or polycarbonate.

Specifically, the reflector 30 includes a T-shaped bottom portion 31 arranged on the back side, and a wall extending forward from the outer peripheral edge of the T-shaped bottom portion 31 and having an open end portion 32a on the front side. It includes a portion 32 (see FIGS. 3 and 4A), and a T-shaped space S1 surrounded by the bottom portion 31 and the wall portion 32 and having a T-shaped opening on the front side.

As shown in FIG. 2, the T-shaped space S1 is a T-shaped space rotated approximately 90 degrees to the left when viewed from the front. The T-shaped space S1 includes a first space S1a extending in the Y-axis direction (an example of the first direction of the present invention) and a second space S1b extending in the Z-axis direction (an example of the second direction of the present invention). include.

The open end portion 32a of the reflector 30 is a T-shaped open end portion rotated approximately 90 degrees to the left when viewed from the front, and surrounds the T-shaped space S1 when viewed from the front.

As shown in FIG. 4, the reflector 30 has an extension part 33 extending rearward from an opening end 32a of the reflector 30 while maintaining a space S2 between the reflector 30 (the wall part 32). . A first light source module 50A is arranged in the space S2.

The extension part 33 of the reflector 30 covers the first light source module 50A arranged in the space S2 so that the first light source module 50A arranged in the space S2 is not visible from the front side.

As shown in FIG. 9, the wall portion 32 (inner surface) of the reflector 30 is provided with a plurality of knurls 32b. The knurling 32b is, for example, a cylindrical surface (or a cylindrical surface) whose cylinder axis extends in the X-axis direction.

A reflective surface is formed on the inner surface (T-shaped bottom 31 and wall 32) of the reflector 30 by aluminum vapor deposition.

Hereinafter, the reflecting surface formed on the T-shaped bottom portion 31 is referred to as a bottom reflecting surface 31a, and the reflecting surface formed on the wall portion 32 (the plurality of knurls 32b) is referred to as a knurled reflecting surface 32b1.

As shown in FIGS. 3 and 4, the bottom reflective surface 31a is arranged with the rear surface of the first light guide 40A facing the rear surface of the first light guide 40A. In addition, the knurled reflecting surface 32b1 is arranged in a state in which the first surface 43a of the extension end portion 43 of the first light guide 40A faces the space S4 therebetween.

The bottom reflective surface 31a reflects, for example, light emitted from the rear surface of the first light guide 40A and the rear surface of the second light guide 40B. Further, the knurled reflecting surface 32b1 reflects (diffuses) the light emitted from the extension end portion 43 of the first light guide 40A, for example. The extension end portion 43 will be described later.

FIG. 7(a) is a front view of the first light guide 40A, and FIG. 7(b) is a rear view.

As shown in FIG. 7, the first light guide 40A includes a rod-shaped light guide portion 42 (first rod-shaped light guide portion 42A, second rod-shaped light guide portion 42B), a plate-shaped light guide portion 41 (first plate-shaped light guide portion). light section 41A, second plate-shaped light guide section 41B, and third plate-shaped light guide section 41C). The material of the first light guide 40A is, for example, transparent resin such as acrylic or polycarbonate.

The first rod-shaped light guide portion 42A and the second rod-shaped light guide portion 42B are arranged in parallel with a space therebetween.

The rod-shaped light guide portion 42 (first and second rod-shaped light guide portions 42A, 42B) has a front surface 42a (see FIG. 7A) arranged on the front side and a rear surface 42b arranged on the opposite side of the rear surface. (See FIG. 7B), and as shown in FIG. It is a long rod-shaped light guide extending generally in the Y-axis direction.

As shown in FIG. 3, the cross-sectional shape of the rod-shaped light guide portion 42 by a plane perpendicular to the Y-axis direction (the XZ plane in FIG. 3) is surrounded by a front surface 42a and a rear surface 42b (a pair of side surfaces 42b1 and a rearmost surface 42b2). It is composed roughly in the shape of a ginkgo tree. Specifically, it is configured as follows.

The front surface 42a of the rod-shaped light guide portion 42 has a cross-sectional shape formed by a plane (the XZ plane in FIG. 3) perpendicular to the longitudinal direction of the rod-shaped light guide portion 42. The cross-sectional shape of the rod-shaped light guide portion 42 is a convex arc toward the front side (right side in FIG. 3). is a curved surface, for example, a cylindrical surface whose cylinder axis extends in the Y-axis direction.

A front surface 42a of the rod-shaped light guide portion 42 is cut with a lens so as to control the light emitted from the front surface 42a and satisfy the light distribution standard of the tail lamp. If the tail lamp light distribution standard is satisfied without lens cutting, the lens cutting may be omitted.

The rear surface 42b of the rod-shaped light guide portion 42 has a cross-sectional shape defined by a plane (the XZ plane in FIG. 3) orthogonal to the longitudinal direction of the rod-shaped light guide portion 42, and is convex toward the inside of the rod-shaped light guide portion 42 and is located on the rear side (FIG. 3). A pair of arc-shaped side surfaces 42b1 arranged so that the distance between them narrows toward the middle left side), and a pair of arc-shaped ends formed by a plane orthogonal to the longitudinal direction of the rod-shaped light guide portion 42. and a rearmost surface 42b2 that connects the pair of side surfaces 42b1 so as to form a linear shape that connects the portions (the left end portion in FIG. 3).

As shown in FIG. 7B, the rear surface 42b (the rearmost surface 42b2) of the rod-shaped light guide portion 42 diffuses the light from the first light source module 50A that is guided through the first light guide 40A to form a rod-shaped light. A plurality of first structures LC1 for emitting light from the front surface 42a of the light guide section 42 are included. The first structure LC1 is, for example, a lens cut such as a V-groove.

In addition, the light RayA (see FIG. 4B) from the first light source module 50A entering the rod-shaped light guide portion 42 from the left end surface 42c1 (light incident surface) of the rod-shaped light guide portion 42 enters the rod-shaped light guide portion 42 However, for example, by increasing the number (density) of the first structures LC1 as the distance from the first light source module 50A increases, the rod-shaped light guide part 42 can be made uniform. (or substantially uniform).

As shown in FIG. 7A, the left end portion 42c of the rod-shaped light guide portion 42 protrudes from the left end portion of the plate-shaped light guide portion 41. As shown in FIG. A left end surface 42c1 (light incident surface) of the rod-shaped light guide portion 42 is, for example, a plane parallel to the XZ plane. A right end portion 42 d of the rod-shaped light guide portion 42 extends to the right end portion of the plate-shaped light guide portion 41 .

FIG. 8 is a cross-sectional view of a modification of the rod-shaped light guide portion 42. As shown in FIG.

As shown in FIG. 8, instead of the rod-shaped light guide portion 42 having a generally ginkgo-shaped cross section, a general rod-shaped light guide portion having a circular cross-sectional shape may be used. By using the rod-shaped light guide portion 42, the rod-shaped light guide portion 42 can emit light brighter than when using a general rod-shaped light guide portion having a circular cross-sectional shape.

The plate-shaped light guide part 41 has a plate-like shape including a front surface 41a (see FIG. 7A) arranged on the front side and a rear surface 41b arranged on the opposite rear side (see FIG. 7B). is a light guide part of As shown in FIG. 3, the front surface 41a and the rear surface 41b of the plate-shaped light guide part 41 are each a flat surface or a flat surface, and are arranged parallel to each other.

A front surface 41a of the plate-shaped light guide portion 41 is cut with a lens so as to control the light emitted from the front surface 41a so as to satisfy the light distribution standard of the tail lamp. If the tail lamp light distribution standard is satisfied without lens cutting, the lens cutting may be omitted.

As shown in FIG. 7, the first plate-shaped light guide portion 41A includes one end edge 41Ac connected to the outer peripheral surface of the first rod-shaped light guide portion 42A, the other end edge 41Ad (peripheral edge) on the opposite side, including.

As shown in FIG. 2, the other edge 41Ad (at least a portion) of the first plate-shaped light guide portion 41A has a uniform (or substantially uniform) gap ( For example, it extends along the open end portion 32a of the reflector 30 while maintaining the gap indicated by L1 in FIG.

As shown in FIG. 7, the second plate-shaped light guide portion 41B is connected to one end edge 41Bc connected to the outer peripheral surface of the first rod-shaped light guide portion 42A and to the outer peripheral surface of the second rod-shaped light guide portion 42B. and the other edge 41Bd.

The third plate-shaped light guide portion 41C includes one end edge 41Cc connected to the outer peripheral surface of the second rod-shaped light guide portion 42B and the other end edge 41Cd (peripheral edge) on the opposite side.

As shown in FIG. 2, the other edge 41Cd (at least part of) of the third plate-shaped light guide portion 41C has a uniform (or substantially uniform) gap ( For example, it extends along the open end portion 32a of the reflector 30 while maintaining a gap indicated by L2 in FIG.

As shown in FIG. 7B, the rear surface 41b of the plate-shaped light guide section 41 diffuses the light from the first light source module 50A that is guided through the first light guide body 40A, thereby diffusing the light from the plate-shaped light guide section. 41 includes a plurality of second structures LC2 for emitting light from the front surface 41a. The second structure LC2 is, for example, a lens cut such as a V-groove.

In addition, the light RayA (see FIG. 4B) from the first light source module 50A entering the rod-shaped light guide portion 42 from the left end surface 42c1 (light incident surface) of the rod-shaped light guide portion 42 enters the rod-shaped light guide portion 42 For example, by increasing the number (density) of the second structures LC2 as the distance from the first light source module 50A increases, the plate-shaped light guide part 41 can be Uniform (or substantially uniform) light can be emitted.

As shown in FIG. 7A, the plate-shaped light guide portion 41 of the first light guide 40A has an opening H1 formed in the reflector 30 in order to fix the first light guide 40A to the reflector 30. A first engaging portion 44a (for example, a groove portion; see FIG. 4A) is provided. The first engaging portion 44a is provided on the first fixing portion 44 extending leftward from the left end portion of the second plate-shaped light guide portion 41B.

Further, as shown in FIG. 5, the plate-shaped light guide portion 41 of the first light guide 40A has claw portions 34 (see FIG. 5, see FIG. 6) is provided. The second engaging portion 45a is provided on a second fixing portion 45 (see FIG. 7B) extending rearward from the right end portion of the plate-shaped light guide portion 41 .

As a result of studies by the present inventors, when the second fixing portion 45 is provided, the right end portion of the first light guide 40A (for example, the rod-shaped light guide portion 42 (the first and second rod-shaped light guide portions 42A and 42B) It was found that the light from the first light source module 50A reaching the right end portion 42d) of the first light guide 40A causes flashing at the right end portion (for example, the second fixing portion 45) of the first light guide member 40A. Further, the light from the first light source module 50A guided in the first light guide 40A is directly emitted from the right end portion of the plate-shaped light guide portion 41, and the wall portion 32 of the reflector 30 (knurled reflection surface 32b1) A point of light may occur due to the reflection at the .

In order to suppress this point light, as shown in FIG. It includes an extension terminal portion 43 that emits the light RayA from the first light source module 50A that has reached the right end portion of the light body 40A as diffused light. Extension termination 43 is an example of a termination of the present invention.

The extension end portion 43 is a plate-shaped light guide portion extending forward from the right end portion 42d of the plate-shaped light guide portion 41, and has a first surface 43a facing the wall portion 32 (knurled reflection surface 32b1) of the reflector 30. and a second surface 43b on the opposite side thereof. The first surface 43a includes a plurality of third structures LC3 for diffusing the light RayA from the first light source module 50A guided inside the extension terminal portion 43 and emitting it from the second surface 43b (see FIG. 12). (a)). The third structure LC3 is, for example, a lens cut such as a V-groove.

The extension end portion 43 is formed in a plate-like light guide portion 41 so that the light from the first light source module 50A that reaches the right end portion 42d of the plate-like light guide portion 41 is totally reflected and enters the extension end portion 43. 41 at an angle θ (see FIG. 4A).

The first light guide 40A configured as described above is arranged in the first space S1a of the reflector 30 by fixing the first fixing portion 44 and the second fixing portion 45 to the reflector 30 .

Specifically, as shown in FIG. 4A, the first light guide 40A is formed on the reflector 30 in a first engaging portion 44a (for example, a groove portion) provided in the first fixing portion 44. The periphery of the opening H1 is engaged, and as shown in FIG. match.

As a result, as shown in FIG. 2, the first light guide 40A is arranged in a state in which the direction in which the rod-shaped light guide 42 of the first light guide 40A extends coincides with the Y-axis direction. It is arranged in the space S1a.

At that time, as shown in FIG. 4(a), ribs 46 (two locations are illustrated in FIG. 4(a)) extending rearward from the rear surface of the first light guide 40A are attached to the bottom portion 31 of the reflector 30. Because of the abutment, the rear surface of the first light guide 40A faces the bottom reflecting surface 31a of the reflector 30 with the space S3 interposed therebetween. Further, the extension end portion 43 also faces the knurled reflecting surface 32b1 of the reflector 30 with the space S4 interposed therebetween. FIG. 9 is a perspective view of the reflector 30 with the first light guide 40A arranged in the first space S1a.

As shown in FIG. 6, the first light source module 50A includes a first light source 51a, a second light source 51b, and a first substrate 52A on which the first and second light sources 51a and 51b are mounted. The second light source module 50B includes a third light source 51c and a second substrate 52B on which the third light source 51c is mounted.

The first to third light sources 51a to 51c have the same configuration. Hereinafter, the first to third light sources 51a to 51c are referred to as a light source 51 when not distinguished.

The light source 51 is, for example, a semiconductor light-emitting element such as an LED that emits red light.

As shown in FIG. 4A, the first light source module 50A is fixed to the first light guide 40A (first fixing portion 44).

Specifically, the first substrate 52A inserts (for example, fits) the first fixing portion 44 of the first light guide 40A into the through hole 53A formed in the first substrate 52A, and the first substrate The periphery of the through hole 53A formed in 52A is engaged with the groove portion 44b formed in the first fixing portion 44. As shown in FIG.

As a result, as shown in FIG. 4B, in the first light source module 50A, the light source 51 mounted on the first substrate 52A is located at the left end portion 42c (left end surface) of the rod-shaped light guide portion 42 of the first light guide body 40A. 42c1) and is fixed to the first light guide 40A (first fixing portion 44).

FIG. 10 is a front view of the second light guide 40B.

As shown in FIG. 10, the second light guide 40B includes a rod-shaped light guide portion 42 (third rod-shaped light guide portion 42C), a plate-shaped light guide portion 41 (fourth plate-shaped light guide portion 41D, a fifth plate-shaped including the light guide portion 41E). The material of the second light guide 40B is, for example, transparent resin such as acrylic or polycarbonate.

The rod-shaped light guide portion 42 (third rod-shaped light guide portion 42C) has a front surface 42a (see FIGS. 4 and 10) arranged on the front side and a rear surface 42b (see FIG. 4) arranged on the rear side on the opposite side. , and extends generally in the Z-axis direction from one end portion 42c (hereinafter also referred to as upper end portion 42c) toward the other end portion 42d (hereinafter also referred to as lower end portion 42d). The lower end portion 42 d of the rod-shaped light guide portion extends to the lower end portion of the plate-shaped light guide portion 41 .

A lower end portion (terminating end portion) of the second light guide 40B (third rod-shaped light guide portion 42C) is rounded. For example, the lower end surface 42d1 of the second light guide 40B (the third rod-shaped light guide portion 42C) has a convex arc shape (for example, a convex surface convex downward). This suppresses the straightness of light and improves the diffusion effect. As a result, point light (for example, light from the second light source module 50B guided in the second light guide 40B is directly emitted from the lower end portion of the second light guide 40B, and the wall portion 32 of the reflector 30 ( Point light caused by being reflected by the knurled reflecting surface 32b1) is reduced. Incidentally, in order to suppress the flashing, similarly to the first light guide 40A, the second light guide 40B (the third rod-shaped light guide 42C) may be provided with an extended end portion 43 at the lower end thereof.

As shown in FIG. 10, the fourth plate-shaped light guide portion 41D includes one end edge 41Dc connected to the outer peripheral surface of the third rod-shaped light guide portion 42C, the other end edge 41Dd (peripheral edge) on the opposite side, including.

As shown in FIG. 2, the other edge 41Dd (at least part of) of the fourth plate-shaped light guide portion 41D has a uniform (or substantially uniform) gap ( For example, it extends along the open end portion 32a of the reflector 30 while maintaining a gap indicated by L3 in FIG.

As shown in FIG. 10, the fifth plate-shaped light guide portion 41E includes one end edge 41Ec connected to the outer peripheral surface of the third rod-shaped light guide portion 42C, the other end edge 41Ed (peripheral edge) on the opposite side, including.

As shown in FIG. 2, the other edge 41Ed (at least part of) of the fifth plate-shaped light guide portion 41E has a uniform (or substantially uniform) gap ( For example, it extends along the open end portion 32a of the reflector 30 while maintaining the gap indicated by L4 and L5 in FIG.

As shown in FIG. 10, the plate-shaped light guide portion 41 of the second light guide 40B is provided at the upper end portion of the plate-shaped light guide 41 in order to fix the first light guide 40A to the reflector 30. A third fixing portion 47 and a fourth fixing portion (not shown) provided at the lower end portion of the plate-shaped light guide portion 41 are included.

By fixing the third fixing portion 47 and the fourth fixing portion to the reflector 30, the rod-shaped light guide portion 42 of the second light guide 40B is formed as shown in FIG. It is arranged in the second space S1b of the reflector 30 with its extending direction aligned with the Z-axis direction.

At this time, as shown in FIG. 4A, the rear surface of the second light guide 40B faces the bottom reflecting surface 31a of the reflector 30 with the first light guide 40A interposed therebetween.

The second light source module 50B is fixed to the second light guide 40B (third fixing portion 47).

Specifically, although not shown, in the second light source module 50B, similarly to the first light source module 50A, the light source 51 mounted on the second substrate 52B is located at the upper end portion of the rod-shaped light guide portion 42 of the second light guide 40B. It is fixed to the second light guide 40B (third fixing portion 47) while facing the 42c (upper end surface 42c1).

As shown in FIG. 4, an inner lens 60 is welded to the reflector 30 to which the first and second light guides 40A and 40B are fixed as described above.

The inner lens 60 includes a lens body 61 (see FIG. 6) having the same external shape as the T-shaped open end 32a of the reflector 30, and legs 62 (see FIG. 4 ( a) see) and

As shown in FIG. 4( a ), the inner lens 60 has a lamp chamber (T Construct a glyph space S1).

In the vehicle lamp 10 configured as described above, a tail lamp is realized by lighting the light sources 51 of the first light source module 50A and the second light source module 50B.

That is, when the light source 51 of the first light source module 50A is turned on, as shown in FIG. Light enters the rod-shaped light guide portion 42 from the left end surface 42c1 (light incident surface) of the first light guide 40A, and repeats internal reflection (total reflection) in the first light guide 40A from the left end to the right end of the first light guide 40A. 11, part of the light is internally reflected (diffused) by the first structure LC1 and emitted from the front surface 42a of the rod-shaped light guide 42 ( 11), and the other part is internally reflected (diffused) by the second structure LC2 and emitted from the front surface 41a of the plate-like light guide 41 (referenced by the symbol RayA2 in FIG. 11). (see light represented by ). FIG. 11 is an optical path diagram of light RayA from the first light source module 50A.

12A is a cross-sectional view of the circled range in FIG. 5 along the XY plane, and FIG. 12B is a cross-sectional view of the circled range in FIG. 5 along the YZ plane. As shown in FIG. 12, the light RayA from the first light source module 50A, which is guided through the first light guide body 40A and reaches the right end of the plate-shaped light guide portion 41, enters the extension end portion 43. , the light is guided through the extension end portion 43 toward the tip portion of the extension end portion 43 while repeating internal reflection (total reflection) within the extension end portion 43 . Then, part of it is internally reflected by the third structure LC3 and emerges from the second surface 43b of the extension end portion 43, the other part emerges from the first surface 43a, and furthermore, the wall portion 32 of the reflector 30 ( The light is reflected (diffusely reflected) by the knurled reflecting surface 32b1) and passes through the extension end portion 43. FIG.

In this way, the light RayA from the first light source module 50A that has reached the right end portion 42d of the plate-shaped light guide portion 41 is diffused by the extension end portion 43 (and the knurled reflecting surface 32b1), so that the first light guide member 40A The flashing that occurs at the other end (for example, the second fixing portion 45) of is suppressed.

Further, when the light source 51 of the second light source module 50B is turned on, although not shown, the light from the light source 51 of the second light source module 50B is directed to the upper end surface 42c1 (the light incident surface 42c1) of the rod-shaped light guide portion 42 of the second light guide 40B. Light enters the rod-shaped light guide portion 42 from the surface), and while repeating internal reflection (total reflection) within the second light guide 40B, the second light guide 40B is directed from the upper end to the lower end of the second light guide 40B. 40B, part of which is internally reflected (diffused) by the first structure LC1 and emitted from the front surface 42a of the rod-shaped light guide 42, and the other part is internally reflected (diffused) by the second structure LC2. diffusely reflected) and emitted from the front surface 41 a of the plate-shaped light guide portion 41 .

As described above, light from the first light source module 50A emitted from the front surface 42a of the rod-shaped light guide portion 42 and the front surface 41a of the plate-shaped light guide portion 41 of the first light guide 40A, and the second light guide Light from the second light source module 50B emitted from the front surface 42a of the rod-shaped light guide portion 42 and the front surface 41a of the plate-shaped light guide portion 41 of 40B form a tail lamp light distribution pattern.

Further, as described above, the light from the first light source module 50A is emitted from the front surface 42a of the rod-shaped light guide portion 42 of the first light guide 40A, and the light from the second light source module 50B is emitted from the second light guide. By emitting light from the front surface 42a of the rod-shaped light guide portion 42 of 40B, the rod-shaped light guide portion 42 (the first to third plate-shaped light guide portions 42A to 42C) uniformly or substantially uniformly emits light (line light emission). That is, a rod-shaped light emitting region is formed. Further, the light RayA from the first light source module 50A that has reached the right end portion 42d of the plate-shaped light guide portion 41 is emitted from the extended end portion 43, so that the extended end portion 43 emits light uniformly or substantially uniformly (surface light emission). do.

Further, as described above, the light from the first light source module 50A is emitted from the front surface 41a of the plate-shaped light guide portion 41 of the first light guide 40A, and the light from the second light source module 50B is emitted from the second light guide. By emitting from the front surface 41a of the plate-shaped light guide portion 41 of the body 40B, the plate-shaped light guide portion 41 (first to fifth plate-shaped light guide portions 41A to 41E) emits light uniformly or substantially uniformly (surface emission). do. That is, a plate-like light emitting region is formed.

The rod-shaped light guide portion 42 (rod-shaped light emitting region) emits light relatively brighter than the plate-shaped light guide portion 41 (plate-shaped light emitting region). This is because the optical axis of the light source 51 and the direction in which the rod-shaped light guide section 42 extends are generally aligned, so light having a relatively high intensity within the rod-shaped light guide section 42 (for example, within a half-value angle) This is because light having a relatively weak intensity is guided in the plate-shaped light guide portion 41, while the light is guided.

For this reason, it is possible to realize an extremely well-designed luminous appearance in which the bar-shaped luminous region (line luminous region) emerges in the plate-shaped luminous region (surface luminous region).

As described above, according to the present embodiment, there is provided the vehicle lamp 10 capable of suppressing the flashing generated at the other end portion (for example, the second fixing portion 45) of the first light guide 40A. be able to.

This is because the light that causes the point light, that is, the light from the first light source module 50A that has reached the other end of the first light guide 40A is diffused by the extended end portion 43. FIG.

Further, according to the present embodiment, the knurled reflection surface 32b1 that emits light by reflecting the light that leaks backward from the extension end portion 43 behind the extension end portion 43 that emits surface light is visible, giving a sense of depth. It is possible to realize a three-dimensional luminous appearance with

Further, according to the present embodiment, the gaps (reference numerals L1 to L5 in FIG. To provide a vehicular lamp 10 capable of suppressing non-uniformity of the light guide portion 42 and the plate-like light guide portion 41 and allowing each of the rod-shaped light guide portion 42 and the plate-shaped light guide portion 41 to emit light uniformly (or substantially uniformly). can be done.

This is because, as shown in FIG. 2, the outer peripheral edges of the first and second light guides 40A and 40B are the other edges 41Ad to 41Ed of the plate-shaped light guide 41 instead of the rod-shaped light guide 42; , the other edges 41Ad to 41Ed of the plate-shaped light guide portion 41 extend along the open end portion 32a of the reflector 30. As shown in FIG.

In addition, according to the present embodiment, since the rod-shaped light guide portion 42 having a roughly ginkgo-shaped cross section is used, compared to the case of using a general rod-shaped light guide portion having a circular cross-section (see FIG. 8), , the rod-shaped light guide portion 42 can emit brighter light.

In addition, according to the present embodiment, behind the first and second light guides 40A and 40B that emit surface light (plate-shaped light guide portion 41) and line light-emission (rod-shaped light guide portion 42), the first and second light guides 40A and 40B It is possible to realize a three-dimensional light emission appearance with a sense of depth in which the bottom reflecting surface 31a that emits light by reflecting the light leaking backward from the second light guides 40A and 40B is visible.

Further, according to the present embodiment, it is possible to realize a new appearance of light emission in which the overlapping portion of the first light guide 40A and the second light guide 40B is relatively bright. For example, as shown in FIG. 2, when the first light guide body 40A and the second light guide body 40B are overlapped in a front view, the position where the rod-shaped light guide parts 42 overlap each other (reference numeral C1 in FIG. 2, C2) is the brightest, the portion where the rod-shaped light guide portion 42 and the plate-shaped light guide portion 41 overlap (see the locations indicated by symbols C3 to C6 in FIG. 2), and the plate-shaped light guide portions 41 overlap each other. (Refer to the locations indicated by symbols C7 to C9 in FIG. 2) The locations other than symbols C1 to C9 become darker in this order, that is, the brightness changes in a gradation manner, creating a three-dimensional new appearance with a sense of depth. can be realized.

Further, according to this embodiment, the substrates 52A and 52B on which the light source 51 is mounted can be fixed to the light guides 40A and 40B themselves (see FIG. 4), so that the light source 51 can be mounted on the light guides other than the light guides 40A and 40B. The positioning of the light source 51 with respect to the one end surface 42c1 of the rod-shaped light guide portion 42 can be performed with high accuracy, compared with the case where the light source 51 is fixed to a housing or the like.

Further, according to this embodiment, since the first light source module 50A is covered with the extension portion 33 of the reflector 30 (see FIG. 4), the first light source module 50A (the first substrate 52A on which the light source 51 is mounted) ) can be prevented from being viewed from the front side.

Next, a modified example will be described.

In the above embodiment, an example in which the vehicle lamp of the present invention is applied to a tail lamp has been described, but the present invention is not limited to this. For example, the vehicle lamp of the present invention may be applied to stop lamps, position lamps, turn lamps, back lamps, and DRL (Daytime Running Lamps) lamps.

Further, in the above-described embodiment, an example of using the reflector 30 having the T-shaped opening end portion 32a including the curved portion 32a1 on the front side as the lamp case has been described, but the present invention is not limited to this. That is, the lamp case may be of any type as long as it has an open end, and may have an open end that includes only the curved portion 32a1, or an opening that includes only a linear portion. It may have ends. Further, the open end of the lamp case is not limited to the T-shaped open end 32a, and may be of any shape.

Moreover, although the said embodiment demonstrated the example which used plate-shaped light guide part 41A, 41C as 40 A of 1st light guides, it does not restrict to this. For example, as the first light guide 40A, at least one of the plate-shaped light guides 41A and 41C may be omitted. Similarly, as the second light guide 40B, at least one of the plate-shaped light guides 41D and 41E may be omitted. As the first light guide 40A, the plate-shaped light guide portion 41 may be omitted and only the rod-shaped light guide portion 42 may be used. may be used. Similarly, as the second light guide 40B, the plate-shaped light guide portion 41 may be omitted and only the rod-shaped light guide portion 42 may be used. may be used only.

Further, in the above-described embodiment, an example using the bottom reflecting surface 31a and the knurled reflecting surface 32b1 has been described, but the present invention is not limited to this. For example, the bottom reflecting surface 31a and the knurled reflecting surface 32b1 may be omitted.

All of the numerical values shown in the above embodiments are examples, and it is of course possible to use other appropriate numerical values.

Each above-mentioned embodiment is only a mere illustration in all respects. The present invention is not limitedly interpreted by the description of each of the above embodiments. The invention can be embodied in various other forms without departing from its spirit or essential characteristics.

DESCRIPTION OF SYMBOLS 10... Vehicle lamp, 30... Reflector, 31... Bottom, 31a... Bottom reflecting surface, 32... Wall, 32a... Opening end, 32a1... Curved part, 32b... Knurling, 32b1... Knurling reflecting surface, 33... Extension part , 34 Claw portion 40A First light guide 40B Second light guide 41 (41A to 41E) Plate light guide 41Ac to 41Ec One edge 41Ad to 41Ed Other edge 41a... front surface, 41b... rear surface, 42 (42A to 42C)... rod-shaped light guide portion, 42a... front surface, 42b... rear surface, 42b1... side surface, 42b2... rearmost surface, 43... extension end portion, 43a... surface, 43b... surface , 44... First fixing part 44a... First engaging part 44b... Groove part 45... Second fixing part 45a... Second engaging part 46... Rib 47... Third fixing part 50A... First Light source module 50B Second light source module 51 Light source 52A First substrate 52B Second substrate 53A Through hole 60 Inner lens 61 Lens body 62 Leg LC1 First Structure, LC2...Second structure, S1...T-shaped space, S1a...First space, S1b...Second space, S2...Space, S3...Space, θ...Angle

Claims (3)

a lamp case,
a light guide disposed within the lamp case;
a light source that emits light guided in the light guide;
a reflective surface that diffusely reflects light emitted from the light guide,
The light guide is a light guide that includes a front surface arranged on the front side and a rear surface arranged on the back side opposite to the front surface, and extends from one end toward the other end on the opposite side,
The light source enters the light guide from one end of the light guide, is guided through the light guide toward the other end of the light guide, and exits from the front surface of the light guide. emit light,
The light guide further includes an end portion that emits light from the light source that has been guided through the light guide and reaches the other end of the light guide as diffused light,
The terminal portion is a plate-shaped light guide portion extending forward from the other end portion of the light guide body, and includes a first surface facing the inner surface of the lamp case and a second surface on the opposite side. including
light from the light source that has reached the other end of the light guide enters into the terminal portion and is guided through the terminal portion toward the tip of the terminal portion;
the first surface includes a plurality of structures for diffusing the light from the light source guided in the terminal portion and emitting the light from the second surface;
The reflective surface is arranged with the first surface of the terminal end facing each other, and diffusely reflects the light emitted from the first surface of the terminal end, out of the light from the light source guided in the terminal end. A vehicle lamp characterized by : The light guide further includes a first fixing portion provided at one end of the light guide and fixed to the lamp case, and a second fixing portion provided at the other end of the light guide and fixed to the lamp case. 2 fixed parts;
The vehicle lamp according to claim 1, wherein the second fixing portion extends rearward from the other end portion of the light guide. The light guide includes a rod-shaped light guide portion including a front surface arranged on the front side and a rear surface arranged on the opposite side of the back surface, and a front surface arranged on the front side and the rear surface on the opposite side 3. The vehicular lamp according to claim 1, further comprising at least one of a plate-shaped light guide portion including a rear surface arranged thereon.

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