JP7279358B2 - vehicle lamp - Google Patents

Description

The present disclosure relates to vehicle lamps.

Some vehicular lamps emit light emitted from a light source into a light guide and emitted from the light emitting surface through a light guide portion of the light guide, thereby illuminating the light emitting surface (see, for example, Patent Document 1, etc.). .

This vehicular lamp has a structure in which the light guide part is smoothly connected to the light emitting surface of the light guide, so that the light emitted from the light source can be effectively used and the light can be visually recognized as light having a shape along the light emitting surface. can.

JP 2016-4667 A

Here, in the conventional vehicle lamp, since the light guide is smoothly connected from the light guide portion to the exit surface, the thickness of the light guide portion needs to be increased when the exit surface is enlarged. However, if the thickness of the light guide part is increased, the light guide body is likely to be wavy or sink during molding, so there is a limit to increasing the thickness of the light guide part. For this reason, conventional vehicle lamps are restricted from enlarging the emission surface, and there is room for improvement.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a vehicle lamp capable of enlarging the emission surface while limiting the thickness of the light guide portion.

A vehicle lamp according to the present disclosure includes a light source and a light guide that guides light emitted from the light source forward in an irradiation direction. and an emission surface for emitting the emitted light guided by the light guide portion to the front side of the irradiation direction, and the emission surface has a thickness perpendicular to the irradiation direction and the light guide portion has an upright wall surface extending in the irradiation direction, and the upright wall surface is at least partially provided with a diffusion portion. and

According to the vehicle lamp of the present disclosure, it is possible to increase the emission surface while limiting the thickness of the light guide section.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a state in which a vehicle lamp as an example according to an embodiment of the vehicle lamp according to the present disclosure is mounted on a vehicle; FIG. 2 is a perspective view showing a lighting unit of the vehicle lighting as viewed obliquely from the front. FIG. 4 is a perspective view showing a state in which the lamp unit is viewed obliquely from the rear; FIG. 3 is a sectional view of the lamp unit taken along line II shown in FIG. 2; FIG. 5 is an explanatory view showing the configuration of the incident point in the lamp unit, showing how emitted light L travels by partially enlarging the light source and the incident point in FIG. 4 ; FIG. 5 is a cross-sectional view of the lighting unit taken along the line II-II shown in FIG. 4, showing the upright wall surface of the light guide portion provided corresponding to the incident point viewed from the outside of the vehicle in the width direction; are shown together. FIG. 6 is an explanatory view similar to FIG. 5 showing the configuration of the incident point as a modified example of the lamp unit;

Example 1 of the vehicle lamp 10 as one embodiment of the vehicle lamp according to the present disclosure will be described below with reference to FIGS. 1 to 7 . 5 and 7 to facilitate understanding of how the emitted light L from the light source 21 travels, and FIG. , hatches attached to the light guides 22 are omitted.

The vehicle lamp 10 is used as a lamp for a vehicle such as an automobile, and is suitable for clearance lamps, signal lights, position lamps, and DRLs (Daytime Running Lamps). show. As shown in FIG. 1, the vehicle lamps 10 are provided on both left and right sides of the front portion of the vehicle 1, and are symmetrical and substantially identical to each other. A vehicle lamp 10 is configured by providing a lamp unit 20 in a lamp chamber 11 formed of a lamp housing with an open front end and an outer lens covering the opening. The lamp housing has a hollow shape with one end open and the other end closed, constitutes a mounting location for the lamp unit 20, and accommodates a lighting drive device for lighting control thereof. In the following description, the vehicular lamp 10 is mounted on the vehicle 1 with the direction of travel of the vehicle 1 when the vehicle 1 travels straight and the direction in which the light emitted from the lamp unit 20 illuminates is the irradiation direction D1 (front side). The vertical direction at 1 is defined as a vertical direction D2 (thickness direction), and the direction orthogonal to the irradiation direction D1 and the vertical direction D2 is defined as a width direction D3. Further, since the left and right vehicle lamps 10 are bilaterally symmetrical and have substantially the same configuration, the configuration of the vehicle lamp 10 provided on the left side as viewed from the riding position will be described below.

As shown in FIGS. 2 to 4, the lamp unit 20 includes a plurality of light sources 21 (see FIG. 4) and elongated light guides 22 corresponding to them. Each light source 21 is composed of a light emitting element such as an LED (Light Emitting Diode) and mounted on a substrate. Each light source 21 is provided so as to individually face each incident point 23 of the light guide 22, with the output optical axis substantially along the irradiation direction D1 (see FIG. 4). The substrate can appropriately supply power from the lighting control circuit to the light source 21 to light the light source 21 . Note that the light source 21 may be composed of a plurality of light emitting elements, and is not limited to the configuration of the first embodiment.

The light guide 22 is made of a transparent resin material that allows light to pass therethrough, such as acrylic resin or polycarbonate. The light guide body 22 has an elongated shape that curves along a longitudinal direction D4 toward the rear side of the vehicle 1 as it goes outward from the vehicle 1 from the front end positioned inside the vehicle 1 . (See Fig. 1, etc.). The longitudinal direction D4 is inclined with respect to a plane including the irradiation direction D1 and the vertical direction D2. The light guide 22 is configured by connecting a plurality of incident points 23 individually corresponding to the respective light sources 21 by a light guide portion 24 and providing an exit surface 25 on the front side of the light guide portion 24 in the irradiation direction D1. there is In the light guide body 22, the light guide portion 24 and the emission surface 25 extend in the longitudinal direction D4, and the incident points 23 (light sources 21) are aligned in the longitudinal direction D4 accordingly. Accordingly, in the light guide body 22 , the positions of the incident points 23 are set so that the incident points 23 located on the outer side of the vehicle 1 are located on the rear side of the vehicle 1 .

As shown in FIGS. 4 and 5, each incident point 23 is provided at a point facing each light source 21, that is, on the front side of the light source 21 in the irradiation direction D1. At each incident point 23 , a recess 26 is provided by partially recessing a portion of the light guide 22 facing the light source 21 . As shown in FIG. 5, the recess 26 includes a curved incident surface 27 that is curved so as to be convex toward the rear side (light source 21 side) of the irradiation direction D1, and a curved incident surface 27 that surrounds the curved incident surface 27 and extends in the irradiation direction D1. and an annular entrance face 28 extending into. At the incident point 23 , an annular reflecting surface 29 is provided surrounding the recess 26 , that is, the annular incident surface 28 . The annular reflecting surface 29 is formed by curving the light guide 22 so as to be convex rearward in the irradiation direction D1.

At the incident point 23 , the light emitted from the light source 21 (in this specification, referred to as emitted light L regardless of whether it enters the light guide 22 or exits from the light guide 22 ) travels to the recess 26 . , enters the light guide 22 via its curved entrance surface 27 and annular entrance surface 28 . At the incident point 23, the curved incident surface 27 is set in consideration of the emitting position of the light source 21 so that the emitted light L is parallel light. Further, at the incident point 23, the light source 21 is arranged so that the emitted light L that has entered the light guide 22 through the annular incident surface 28 becomes parallel light when reflected by the annular reflecting surface 29 using total reflection. The annular reflection surface 29 is set in consideration of the exit position and the position of the annular entrance surface 28 . Therefore, the incident point 23 causes the emitted light L, which is emitted from the light source 21 and is incident on the light guide 22, to travel forward in the irradiation direction D1 as parallel light. The parallel light (parallel light) refers to light in a state in which the emitted light L is collimated by passing through the curved incident surface 27 and the annular reflecting surface 29 .

As shown in FIGS. 2 to 4, the light guide portion 24 extends from each incident point 23 to the front side in the irradiation direction D1. The emitted light L traveling forward in the irradiation direction D1 is guided forward in the irradiation direction D1 as it is. In addition, the light guide section 24 may reflect the emitted light L from each incident point 23 to guide it to the front side of the irradiation direction D1, and is not limited to the configuration of the first embodiment.

The light guide section 24 has an upper wall surface 31, a lower wall surface 32, and an upright wall surface 33, as shown in FIG. The upper wall surface 31 constitutes an upper boundary surface in the vertical direction D2 of the light guide section 24, and is a plane extending in the irradiation direction D1 while being orthogonal to the vertical direction D2. The lower wall surface 32 constitutes a lower boundary surface in the vertical direction D2 in the light guide section 24, and is a plane extending in the irradiation direction D1 while being orthogonal to the vertical direction D2. The upper wall surface 31 and the lower wall surface 32 extend forward along the irradiation direction D1 from the front end portion 29a of the annular reflecting surface 29 of the incident point 23 in the irradiation direction D1. Inhibition of forward travel of emitted light L is suppressed.

Each vertical wall surface 33 is a flat surface that connects the upper wall surface 31 and the lower wall surface 32 in the vertical direction D2. Each vertical wall surface 33 is provided so as to extend forward in the irradiation direction D<b>1 inside the vehicle 1 with respect to the corresponding incident point 23 . Here, in the light guide 22, as shown in FIGS. 3 and 4, the incident points 23 are arranged in the longitudinal direction D4 inclined with respect to the plane including the irradiation direction D1 and the vertical direction D2. The position of each incident point 23 is displaced to the rear side of the irradiation direction D1 as it goes to the outside of the vehicle 1 . Along with this, the vertical wall surface 33 is provided so as to bridge two adjacent incident points 23 in the irradiation direction D1 with respect to the incident points 23 at different positions in the irradiation direction D1. The vertical wall surface 33 located inside the vehicle 1 on the frontmost side in the irradiation direction D1 has an incident point 23 on the front side of the incident point 23 located on the inside of the vehicle 1 on the frontmost side in the irradiation direction D1. Therefore, it does not span two adjacent incident points 23 .

Each standing wall surface 33 is provided with a diffusion portion 34 . The diffusing portion 34 is formed with at least one of concave portions and convex portions extending in the irradiation direction D1 side by side. (See FIG. 6). The diffusing portion 34 may be formed with concave portions extending in the irradiation direction D1 arranged in parallel in the vertical direction D2. good too. Each convex portion 34a is formed with a continuous curved surface when viewed in a cross section orthogonal to the irradiation direction D1. In the first embodiment, the diffusing portion 34 extends over the entire surface of the standing wall surface 33, that is, from the annular reflecting surface 29 (the end portion 29a thereof) to the front end of the standing wall surface 33 (annular reflection of the incidence point 23 located on the front side) in the irradiation direction D1. 29) and from the upper wall surface 31 to the lower wall surface 32 in the vertical direction D2. The diffusing portion 34 (upright wall surface 33) reflects light using total reflection.

As shown in FIG. 6, the light guide 22 is provided with an expanded portion 35 . The extended portion 35 is provided at the front end portion of the light guide portion 24 in the irradiation direction D1, and has a thickness larger than that of the light guide portion 24 in the vertical direction D2. The extended portion 35 includes an extended upper wall surface 36 located above the upper wall surface 31 of the light guide portion 24 in the vertical direction D2, and an extended upper wall surface 36 located above the lower wall surface 32 of the light guide portion 24 in the vertical direction D2. and a lower wall surface 37 . The extended portion 35 forms an upper extended portion 35a by displacing an extended upper wall surface 36 upward from the upper wall surface 31 with a step difference, and an extended lower wall surface 37 is displaced downward from the lower wall surface 32 with a step difference. A lower extended portion 35b is formed by being formed. Therefore, the expanded portion 35 is expanded in the vertical direction D2 from the light guide portion 24 with a step by the upper expanded portion 35a and the lower expanded portion 35b, and is adjacent to the light guide portion 24. As shown in FIG.

The extended portion 35 spans the front ends of the extended upper wall surface 36 and the extended lower wall surface 37 in the vertical direction D2 to form the emission surface 25 . Thereby, the emission surface 25 has a dimension larger than that of the light guide portion 24 in the vertical direction D2. Further, the extended portion 35 is located at a position displaced forward from the front end of the light guide portion 24 by the amount of the extended upper wall surface 36 and the extended lower wall surface 37 from the front end portion of the light guide portion 24 . An exit surface 25 is arranged. The extension part 35 extends in the longitudinal direction D4 at the end on the front side of the irradiation direction D1 in accordance with the fact that the light guide part 24 of the light guide 22 extends in the longitudinal direction D4 ( 1 to 4). For these reasons, the vertical direction D<b>2 is perpendicular to the irradiation direction D<b>1 and functions as a thickness direction in which the emission surface 25 is larger than the light guide section 24 . Moreover, the longitudinal direction D4 is inclined with respect to a plane including the irradiation direction D1 and the vertical direction D2 (thickness direction), and functions as an inclination direction in which the light sources 21 and the incident points 23 are arranged.

The expanded portion 35 of Example 1 is displaced forward in the irradiation direction D1 from the upper side to the lower side in the vertical direction D2. Therefore, the emission surface 25 is inclined so as to be displaced forward in the irradiation direction D1 from the upper side to the lower side in the vertical direction D2. As shown in FIGS. 1 to 4, the exit surface 25 extends in the longitudinal direction of the light guide 22 while maintaining the above-described inclined state at the end of the light guide 24 on the front side in the irradiation direction D1. It is a long surface extending along D4. Therefore, the emission surface 25 can be visually recognized as linear (linear) light by emitting the light. The exit surface 25 is provided with small rectangular protrusions (so-called prisms) arranged in a row, and is designed to enhance the design from the front side of the irradiation direction D1 and to diffuse the emitted light. Therefore, the output surface 25 can be visually recognized as linear light without unevenness.

In the vehicle lamp 10 of the first embodiment, the lamp unit 20 supplies electric power from the lighting control circuit to the light source 21 through the substrate to light the light source 21 . Then, the emitted light L from the light source 21 travels radially around the emitted optical axis, reaches the incident point 23, travels from the incident point 23 into the light guide 22, and becomes parallel light (Fig. 5). The emitted light L travels forward in the irradiation direction D<b>1 in the light guide 22 (light guide section 24 ) and goes to the emission surface 25 . The emitted light L from the incident part 23 travels forward in the irradiation direction D1 in the light guide part 24 and reaches the emission surface 25 of the expanded part 35. ). Here, since the emitted light L from the incident portion 23 is basically parallel light traveling along the irradiation direction D1, it is emitted to the upper expanded portion 35a and the lower expanded portion 35b of the expanded portion 35. It is difficult for the incident light L to travel. As a result, the output light L emitted from both ends in the vertical direction D2 on the light exit surface 25 is extremely small, and there is a possibility that both ends in the vertical direction may become dark.

For this reason, the vehicle lamp 10 is provided with an upright wall surface 33 on which a diffusion portion 34 is formed so as to individually correspond to each incident point 23 , that is, each light source 21 . In the light guide 22, of the emitted light L emitted from each light source 21 and incident from each incident point 23, a part of the emitted light L1 (Fig. 5) faces the vertical wall surface 33 . In the example shown in FIG. 5, the emitted light L1 traveling from the incident point 23 toward the vertical wall surface 33 passes through a point located inside the vehicle 1 with respect to the light source 21 on the annular incident surface 28. It may pass through a portion on the surface 28 positioned in the vertical direction D2 with respect to the light source 21 . Here, the emitted light L1 directed from the incident point 23 toward the vertical wall surface 33 is basically directed toward the vertical wall surface 33 in a direction close to the irradiation direction D1 (having a small vector component in the vertical direction D2). However, the emitted light L1 is reflected and diffused by the diffusing portion 34 (convex portion 34a) because the diffusing portion 34 having a plurality of convex portions 34a extending in the irradiation direction D1 is provided on the standing wall surface 33. A portion of the traveling direction is changed to a direction inclined toward the vertical direction D2 (a direction having a large vector component in the vertical direction D2).

Since each convex portion 34a extends in the irradiation direction D1, the emitted light L maintains the vector component in the irradiation direction D1 toward the expanded portion 35. As shown in FIG. For these reasons, the emitted light L reflected and diffused by the diffusing portion 34 travels toward the expanded portion 35 while making the direction inclined toward the vertical direction D2 side. As a result, at least part of the emitted light L from the diffusing portion 34 travels to the upper expanded portion 35a and the lower expanded portion 35b in the expanded portion 35, and also from both ends of the emission surface 25 in the vertical direction D2. The output light L can be actively emitted, and the emission surface 25 can be illuminated uniformly in the vertical direction D2 as a whole.

Here, in the vehicle lamp 10, the emission surface 25 is a single surface extending in the longitudinal direction D4, whereas the plurality of incident points 23 and the plurality of light sources 21 are arranged side by side in the longitudinal direction D4. . For this reason, in the irradiation direction D1, the output surface 25 has a portion facing each incident point 23 (each light source 21) and a portion facing between them (hereinafter also referred to as an intermediate portion), which are alternately arranged. . For this reason, when only the parallel output light L from each incident portion 23 is guided to the output surface 25, the output surface 25 cannot emit the output light L from the intermediate portion, resulting in a bright portion and a dark portion. are arranged alternately. On the other hand, the vehicular lamp 10 is provided with the upright wall surface 33 (diffusion portion 34) inside the vehicle 1 from each incident point 23, so that the emitted light L1 traveling from each incident point 23 toward each upright wall surface 33 is By being reflected by the vertical wall surface 33 , part of the emitted light L<b>1 can travel to each portion outside each incident point 23 . In addition, since the vertical wall surfaces 33 are provided so as to extend forward in the irradiation direction D1 from the corresponding incident points 23, the emitted light L1 from the incident points 23 is incident on various positions in the irradiation direction D1. It can be made to advance toward the emission surface 25 at various angles to the outside of 33, and the reflected emitted light L1 can be prevented from concentrating in a narrow range and allowed to advance to an intermediate portion. In addition, in the vehicular lamp 10, the emission surface 25 is extended in the longitudinal direction D4 and the incident points 23 are arranged side by side. can be efficiently advanced to each portion outside each incident point 23 . For these reasons, in the vehicle lamp 10, the emitted light L can be positively guided to the intermediate portions of the emission surface 25, and it is possible to suppress the bright and dark portions from arranging alternately. The exit surface 25 can be illuminated uniformly as a whole even in the longitudinal direction D4.

Therefore, in the vehicle lamp 10, the emitted light L from each light source 21 can be emitted from the entire surface of the emission surface 25 including the upper and lower ends, and the unevenness extending in the longitudinal direction D4 along the emission surface 25 can be eliminated. It can be visually recognized as linear light without Accordingly, the vehicular lamp 10 can be viewed from the vertical direction D2 and the width direction D3 on the front side of the vehicle 1 by emitting light over the entire emission surface 25, and functions as a DRL in the vehicle 1 (Fig. 1).

Next, a conventional vehicle lamp will be described. In the conventional vehicle lamp, the light guide part is smoothly connected to the emission surface, so that the emitted light from the light source guided forward in the irradiation direction by the light guide part can be spread over the entire emission surface. Thus, the light emitted from the light source is effectively used and the entire emission surface is illuminated. For this reason, in order to increase the vertical dimension (thickness direction) of the emission surface of the conventional vehicle lamp, it is necessary to increase the vertical dimension of the light guide portion, that is, the thickness of the light guide portion. There is However, if the thickness of the light guide portion of the light guide is increased, waviness and sink marks are likely to occur in the light guide portion due to molding shrinkage of the resin material when the light guide is molded using a mold. There is a limit to increasing the thickness of the light guide section.

Here, in the conventional vehicle lamp, as in the vehicle lamp 10 of the first embodiment, a step is provided on the front side of the light guide portion in the irradiation direction to provide an extended portion, thereby increasing the vertical dimension of the emission surface. can be considered. However, in the conventional vehicle lamp, even if the extension part is simply provided to increase the vertical dimension of the emission surface, the output light cannot be propagated to the upper extension part and the lower extension part of the extension part as described above. becomes difficult. For this reason, in the conventional vehicle lamp, even if the light emitting surface is enlarged by expanding the light emitting surface, both the upper and lower ends of the light emitting surface become dark. does not change much and cannot be increased. For these reasons, conventional vehicular lamps are restricted from enlarging the emission surface.

On the other hand, in the vehicle lamp 10 of Example 1, the light guide portion 24 of the light guide body 22 of the lamp unit 20 has a plurality of convex portions 34a extending in the irradiation direction D1 arranged in parallel in the vertical direction D2. A vertical wall surface 33 having a diffusion portion 34 is provided. The vehicular lamp 10 has an enlarged portion 35 on the front side of the light guide portion 24 in the irradiation direction D1 to increase the dimension of the emission surface 25 in the vertical direction D2. For this reason, the vehicular lamp 10 is provided with the extended portion 35 so that the dimension of the emission surface 25 in the vertical direction D2 is larger than that of the light guide portion 24, and the upright wall surface 33 having the diffusion portion 34 is provided. Incoming light L can travel to an upper extension portion 35a and a lower extension portion 35b of the extension point 35 . As a result, the vehicular lamp 10 can illuminate both the upper and lower ends of the light emitting surface 25, and the light emitting surface 25 can be enlarged without increasing the dimension of the light guide portion 24 in the vertical direction D2. can.

In addition, in the vehicle lamp 10 of the first embodiment, the emission surface 25 is located at a position where the extended portion 35 is displaced forward from the front end portion of the light guide portion 24 by the extended upper wall surface 36 and the extended lower wall surface 37 . , the emitted light L, which is reflected by the diffusing portion 34 and whose traveling direction is tilted toward the vertical direction D2, travels to the upper expanded portion 35a and the lower expanded portion 35b of the expanded portion 35. making it easier. Therefore, the vehicular lamp 10 can make the emission surface 25 larger without enlarging the dimension of the light guide portion 24 in the vertical direction D2 while making it possible to brighten both the upper and lower ends of the emission surface 25 more reliably. can do.

The vehicle lamp 10 of Example 1 can obtain the following effects.

In the vehicle lamp 10, in the light guide body 22, the emission surface 25 is made larger than the light guide portion 24 in the thickness direction (vertical direction D2 in the first embodiment), and the upright wall surface 33 having the diffusion portion 34 guides the light. It is provided in the part 24 . Therefore, the vehicular lamp 10 reflects and diffuses part of the emitted light L emitted from the light source 21 by the diffusing portion 34, so that the light can travel in a direction inclined in the vertical direction D2. Accordingly, the vehicle lamp 10 can positively emit the emitted light L from both ends in the vertical direction D<b>2 of the emission surface 25 having a thickness greater than that of the light guide portion 24 . Therefore, the vehicular lamp 10 prevents the thickness of the light guide portion 24 from increasing, and also positively emits the emitted light L from both ends in the vertical direction D2 of the light emitting surface 25 which is thicker than the light guide portion 24. The light can be emitted in a targeted manner, and the emission surface 25 can be enlarged.

In the vehicle lamp 10, the diffuser 34 is formed by arranging in parallel at least one of concave portions and convex portions (a plurality of convex portions 34a in the first embodiment) extending in the irradiation direction D1. For this reason, the vehicular lamp 10 reflects and diffuses part of the emitted light L emitted from the light source 21 by the diffusing portion 34, thereby maintaining the vector component in the irradiation direction D1 while tilting in the vertical direction D2. You can move in that direction. As a result, the vehicular lamp 10 more actively emits the emitted light L reflected and diffused by the diffusion portion 34 from both ends in the vertical direction D2 of the emission surface 25 having a thickness greater than that of the light guide portion 24. can be made

The vehicular lamp 10 has a plurality of light sources 21 arranged in an inclined direction (longitudinal direction D4 in the first embodiment), and a plurality of incident points 23 individually corresponding to the light sources 21 provided on the light guide body 22 to form a plurality of incident points. A plurality of vertical wall surfaces 33 are provided on the light guide 22 so as to individually correspond to 23 . For this reason, the vehicular lamp 10 reflects and diffuses the emitted light L incident from each incident point 23 by the diffusing portion 34 of the corresponding standing wall surface 33 , so that the vehicular lamp 10 has a thickness larger than that of the light guide portion 24 . The emitted light L is actively advanced to both ends in the vertical direction D2 on the light emitting surface 25 which is flat. As a result, the vehicular lamp 10, even with the emission surface 25 extending in the longitudinal direction D4, directs the emitted light L from the plurality of light sources 21 and the incident points 23 arranged in the longitudinal direction D4 to the above-described can be guided as Therefore, the vehicular lamp 10 can illuminate the output surface 25 over the entire longitudinal direction D4 while illuminating both ends in the vertical direction D2.

The vehicular lamp 10 has each standing wall surface 33 bridging two adjacent incident points 23 . Therefore, the vehicular lamp 10 can provide each vertical wall surface 33 having a diffusing portion 34 by utilizing the space between two adjacent incident points 23 produced by arranging the incident points 23 side by side in the direction of inclination. Therefore, the entire output surface 25, which is larger than the light guide portion 24, can be illuminated while miniaturization is possible.

In the vehicle lamp 10, the light guide member 22 is provided with an expanded portion 35 that is stepped and expanded in the vertical direction D2 (thickness direction) from the light guide portion 24 on the front side of the light guide portion 24 in the irradiation direction D1. , the emission surface 25 is formed at the front end portion of the expanded portion 35 in the irradiation direction D1. Therefore, the vehicular lamp 10 can more reliably increase the thickness of the emission surface 25 while preventing the thickness of the light guide portion 24 from increasing. can be illuminated at both ends in the vertical direction D2.

Therefore, the vehicle lamp 10 of Example 1 as the vehicle lamp according to the present disclosure can increase the emission surface 25 while limiting the thickness of the light guide portion 24 .

Although the vehicle lamp of the present disclosure has been described above based on the first embodiment, the specific configuration is not limited to the first embodiment, and is outside the gist of the invention according to each claim. Design changes, additions, etc. are permitted unless

In Example 1, the number of light sources 21 and incident points 23 shown in FIGS. 1 and 2 are provided. However, the number, positions, and sizes of the light sources 21 and the incident points 23 may be appropriately set, and the configuration is not limited to that of the first embodiment.

In the first embodiment, in the light guide 22, the emitted light L from the light source 21 corresponding to each incident point 23 is made into parallel light and guided forward in the irradiation direction D1. However, each incident point 23 has, on at least a part of the annular reflecting surface 29, an adjusting reflecting point 38 (see FIG. 7) for reflecting the emitted light L from the light source 21 toward the vertical wall surface 33 (its diffusion portion 34). It is good also as a structure provided. The adjusted reflection point 38 reflects the emitted light L, which is emitted from the light source 21 and travels toward itself through the annular entrance surface 28 of the recess 26 , toward the vertical wall surface 33 , thereby causing the outgoing light beam L to propagate toward the vertical wall surface 33 . It adjusts the amount of incident light L (amount of light). FIG. 7 shows an incident point 23A as a modified example having such a configuration. The incident point 23</b>A has an adjusted reflection point 38 that is positioned on the upright wall surface 33 side (inner side of the vehicle 1 ) with respect to the light source 21 on the annular reflecting surface 29 . Therefore, the vehicular lamp 10 of the modified example can actively cause the emitted light L2 reflected by the adjustment reflection portion 38 of the emitted light L to proceed toward the vertical wall surface 33, and the upper expanded portion of the expanded portion 35 The emitted light L2 can be more actively advanced to 35a and the lower extended portion 35b. As a result, the vehicular lamp 10 of the modified example can cause the light to be controlled to travel to the vertical wall surface 33 . The brightness of both ends in the vertical direction D2 can be adjusted, and the entire emission surface 25 can be illuminated more appropriately. In addition, in the incident point 23A of the modified example, the adjustment reflection point 38 is provided on the standing wall surface 33 side of the light source 21 in the annular reflecting surface 29. The shape, position, size, etc. may be appropriately set as long as the light is provided on a part of the annular reflecting surface 29 so as to reflect the light toward 33, and is not limited to the example shown in FIG.

In Example 1, the annular reflecting surface 29, the upright wall surface 33 (diffusing portion 34), and the adjustment reflecting portion 38 are assumed to reflect using total reflection. However, if each surface (29, 33, 34, 38) reflects the emitted light L from the light source 21 so as to have the above-described functions, aluminum, silver, or the like may be deposited, painted, or the like to form a light guide. The emitted light L may be reflected by adhering it to 22, or other configurations may be used, and the configuration of the first embodiment is not limited.

In Example 1, the exit surface 25 and the light guide portion 24 are shaped as shown in FIGS. 2 to 7 . However, as long as the light L emitted from the light source 21 is guided to the light emitting surface 25 and emitted forward in the irradiation direction D1 from the light emitting surface 25, other configurations may be used. 1 configuration.

In Example 1, the diffusion portion 34 is provided over the entire surface of the vertical wall surface 33 . However, the diffusing portion 34 is formed by arranging at least one of concave portions and convex portions extending in the irradiation direction D1 so that the light is positively emitted from both ends of the emission surface 25 in the vertical direction D2. As long as it reflects the emitted light L, it may be provided on a part of the standing wall surface 33, and is not limited to the configuration of the first embodiment.

In Example 1, the expanded portion 35 is expanded to both sides in the vertical direction D2 (thickness direction) from the light guide portion 24, that is, has an upper expanded portion 35a and a lower expanded portion 35b. However, the expanded portion 35 is expanded in the thickness direction with a step on the front side of the light guide portion 24 in the irradiation direction D1, and the emission surface 25 is formed at the end portion on the front side in the irradiation direction D1. If so, it may be expanded only in one direction in the thickness direction with respect to the light guide portion 24, and the structure is not limited to that of the first embodiment.

REFERENCE SIGNS LIST 10 Vehicle lamp 21 Light source 22 Light guide 23, 23A Incidence point 24 Light guide part 25 Emission surface 26 Recess 29 Annular reflecting surface 33 Standing wall surface 34 Diffusion part 34a Protrusion 35 Expansion part 38 Adjustment reflection part D1 Irradiation direction D2 Up and down Direction (thickness direction) D4 Long direction (tilt direction) L Output light

Claims (3)

comprising a light source and a light guide that guides the light emitted from the light source to the front side in the irradiation direction;
The light guide includes a light guide section that guides the emitted light from the light source forward in the irradiation direction;
an emission surface for emitting the emission light guided by the light guide section forward in the irradiation direction,
the emission surface has a dimension larger than that of the light guide section in a thickness direction orthogonal to the irradiation direction;
The light guide section has an upright wall surface extending in the irradiation direction,
At least a portion of the standing wall surface is provided with a diffusing portion ,
The light guide has an expanded portion that is expanded in the thickness direction with a step from the light guide on the front side of the light guide in the irradiation direction,
the exit surface is formed at a front end portion in the irradiation direction of the expanded portion;
A plurality of the light sources are provided side by side in a tilt direction tilting with respect to a plane including the irradiation direction and the thickness direction,
The light guide has a plurality of incident points corresponding to the plurality of light sources,
A plurality of the vertical wall surfaces are provided individually corresponding to the plurality of incident points,
The plurality of incident points have recesses formed by partially recessing portions of the light guide section facing the light source, and an annular reflecting surface surrounding the recesses,
The vehicular lamp, wherein at least a part of the annular reflecting surface is formed as an adjustment reflecting portion for reflecting the light emitted from the light source through the recess toward the upright wall surface. 2. The vehicular lamp according to claim 1, wherein the diffusing portion is formed with at least one of a concave portion and a convex portion extending in the irradiation direction. 3. The vehicular lamp according to claim 1, wherein the vertical wall surface is provided so as to span two adjacent incident points .

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