JP2020107394A - Vehicular lighting fixture - Google Patents

Abstract

To provide a vehicular lighting fixture that can expand an emitting surface while limiting the thickness of a light guide part.SOLUTION: A vehicular lighting fixture 10 comprises a light source 21, and a light guide body 22 for guiding emitted light L from the light source 21 to a front side in an irradiation direction D1. The light guide body 22 comprises a light guide part 24 for guiding the emitted light L from the light source 21 to the front side in the irradiation direction D1, and an emitting surface 25 for emitting the emitted light L guided by the light guide part 24 to the front side in the irradiation direction D1. The size of the emitting surface 25 is larger than that of the light guide part 24 in a thickness direction (vertical direction D2) orthogonal to the irradiation direction D1. The light guide part 24 comprises a rising wall part 33 extending in the irradiation direction D1. A diffusion part 34 is provided in at least a portion of the rising wall part 33.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a vehicle lighting device.

Some vehicular lamps emit light from a light source into a light guide body, and emit the light through the light guide portion of the light guide body from the light exit surface to illuminate the light exit surface (see, for example, Patent Document 1). ..

In this vehicle lamp, by smoothly connecting the light guide portion to the emission surface in the light guide, the emission light from the light source can be effectively used and visually recognized as light having a shape along the emission surface. it can.

JP, 2016-4667, A

Here, in the conventional vehicular lamp, in the light guide body, since the light guide part is smoothly connected to the emission surface, it is necessary to increase the thickness of the light guide part when the emission surface is increased. However, when the thickness of the light guide section of the light guide is increased, waviness and sink marks are likely to occur during molding, and therefore there is a limit to increasing the thickness of the light guide section. For this reason, in the conventional vehicular lamp, enlargement of the emission surface is limited, 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 vehicular lamp that can increase the emission surface while limiting the thickness of the light guide portion.

A vehicular lamp according to an embodiment of the present disclosure includes a light source and a light guide body that guides light emitted from the light source to the front side in the irradiation direction, and the light guide body emits the light emitted from the light source in the irradiation direction. Of the light guide portion, and an emission surface for emitting the emitted light guided by the light guide portion to the front side in the irradiation direction, the emission surface having a thickness orthogonal to the irradiation direction. In a direction larger than the light guide portion, the light guide portion has a standing wall surface extending in the irradiation direction, and the standing wall surface is provided with a diffusing portion at least partially. And

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

FIG. 8 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. 3 is a perspective view showing a state in which a lamp unit of a vehicle lamp is viewed from diagonally above and in the front. It is a perspective view which shows a mode that the lamp unit was seen from the diagonally upper back. It is sectional drawing of the lamp unit obtained along the II line shown in FIG. It is explanatory drawing which shows the structure of the incident location in a lamp unit, and has shown the mode that the emitted light L advances by partially enlarging the light source and incident location in FIG. FIG. 5 is a cross-sectional view of the lamp unit taken along the line II-II shown in FIG. 4, showing a state in which the standing wall surface of the light guide portion provided corresponding to the incident point is viewed from the outside of the vehicle in the width direction. It is also shown. It is explanatory drawing similar to FIG. 5 which shows the structure of the incident location as a modification in a lamp unit.

Hereinafter, a first embodiment of a vehicular lamp 10 as an embodiment of the vehicular lamp according to the present disclosure will be described with reference to FIGS. 1 to 7. 5 and 7, in order to facilitate understanding of how the emitted light L from the light source 21 travels, in FIG. 6, in order to facilitate understanding of the configurations of the standing wall surface 33 and the diffusion portion 34. , The 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 a clearance lamp, a signal lamp, a position lamp, and a DRL (Daytime Running Lamps). In the first embodiment, an example used for the DRL of the vehicle 1 is used. Show. As shown in FIG. 1, the vehicular lamp 10 is provided on both the left and right sides of the front part of the vehicle 1 and is configured to be bilaterally symmetrical and substantially equal to each other. The vehicular lamp 10 is configured by providing a lamp unit 20 in a lamp chamber 11 formed by a lamp housing having an open front end and an outer lens covering the opening. The lamp housing has a hollow shape in which one end is open and the other end is closed, constitutes a mounting location of the lamp unit 20, and accommodates a lighting drive device for controlling lighting thereof. In the following description, the vehicle lamp 10 is mounted on the vehicle 1 with the traveling direction when the vehicle 1 travels straight ahead and the direction of irradiation by light emitted from the lamp unit 20 is the irradiation direction D1 (front side). The vertical direction in is the vertical direction D2 (thickness direction), and the direction orthogonal to the irradiation direction D1 and the vertical direction D2 is the width direction D3. Further, in the following, since the left and right vehicle lamps 10 are symmetrical and substantially equal to each other, the configuration of the vehicle lamp 10 provided on the left side when viewed from the riding position will be described.

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 thereto. Each light source 21 is composed of a light emitting element such as an LED (Light Emitting Diode) and is mounted on the substrate. Each light source 21 is individually opposed to each incident point 23 of the light guide 22, and is provided so that the emission optical axis is substantially along the irradiation direction D1 (see FIG. 4). The substrate can appropriately supply the power from the lighting control circuit to the light source 21, and turns on the light source 21. The light source 21 may be composed of a plurality of light emitting elements and is not limited to the structure of the first embodiment.

The light guide 22 is formed of a transparent resin material that allows light to pass therethrough, for example, a resin material such as acrylic resin or polycarbonate. The light guide 22 has an elongated shape that curves from a tip portion located inside the front of the vehicle 1 along the longitudinal direction D4 toward the rear of the vehicle 1 as it extends toward the outside of the vehicle 1. (See FIG. 1, etc.). The long direction D4 is inclined with respect to the plane including the irradiation direction D1 and the vertical direction D2. The light guide body 22 is configured such that a plurality of incident points 23 individually corresponding to the respective light sources 21 are connected by a light guide section 24, and an emission surface 25 is provided on the front side of the light guide section 24 in the irradiation direction D1. There is. In the light guide 22, the light guide portion 24 and the emission surface 25 extend in the longitudinal direction D4, and the respective incident points 23 (each light source 21) are aligned in the longitudinal direction D4 accordingly. As a result, in the light guide 22, the positions of the respective incident points 23 are set so that the incident points 23 located outside the vehicle 1 are located on the rear side of the vehicle 1.

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

At the incident point 23, the light emitted from the light source 21 (in this specification, emitted light L regardless of whether the light is incident on the light guide 22 or emitted from the light guide 22) travels to the recess 26. Then, the light enters the light guide 22 through the curved incident surface 27 and the annular incident surface 28. At the incident point 23, the curved incident surface 27 is set in consideration of the emission position of the light source 21 so that the emitted light L becomes parallel light. Further, at the incident point 23, the emitted light L that has entered the light guide 22 through the annular incident surface 28 is collimated when reflected by the annular reflective surface 29 using total reflection, so that it becomes parallel light. The annular reflecting surface 29 is set in consideration of the emission position and the position of the annular incident surface 28. Therefore, the incident point 23 advances the emitted light L emitted from the light source 21 and incident on the light guide 22 to the front side in the irradiation direction D1 as parallel light. The parallel light (parallel light) means light in a state in which the outgoing light L is collimated by passing through the curved incident surface 27 and the annular reflecting surface 29.

As shown in FIG. 2 to FIG. 4, the light guide portion 24 is assumed to extend from each incident point 23 to the front side in the irradiation direction D1, and is emitted from each light source 21 to be parallel light at each incident point 23. The outgoing light L that travels to the front side of the irradiation direction D1 is guided to the front side of the irradiation direction D1 as it is. The light guide section 24 may guide the emitted light L from each incident portion 23 to the front side in the irradiation direction D1 and is not limited to the configuration of the first embodiment.

As shown in FIG. 6, the light guide portion 24 has an upper wall surface 31, a lower wall surface 32, and an upright wall surface 33. The upper wall surface 31 constitutes an upper boundary surface in the vertical direction D2 of the light guide portion 24, and is a flat surface extending in the irradiation direction D1 while being orthogonal to the vertical direction D2. The lower wall surface 32 constitutes a lower boundary surface of the light guide portion 24 in the vertical direction D2, 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 from the end portion 29a on the front side in the irradiation direction D1 of the annular reflecting surface 29 of the incident point 23 to the front side along the irradiation direction D1 and are made parallel light by the incident point 23. It is suppressed that the emitted light L is prevented from proceeding to the front side.

Each standing 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 of the standing wall surfaces 33 is provided inside the vehicle 1 so as to extend to the front side in the irradiation direction D1 with respect to the corresponding incident point 23. Here, in the light guide 22, as shown in FIG. 3 and FIG. 4, since the respective incident points 23 are arranged in the long direction D4 that is 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 toward the outside of the vehicle 1. Along with this, the standing wall surface 33 is provided so as to bridge two adjoining incident points 23 in the irradiation direction D1 with respect to each incident point 23 having a different position in the irradiation direction D1. Incidentally, the standing wall surface 33 located on the innermost side of the vehicle 1 on the frontmost side in the irradiation direction D1 is provided with the incident point 23 on the front side than the incident point 23 also located on the innermost side on the front side in the irradiation direction D1. Therefore, it is not supposed to bridge two adjacent incident points 23.

A diffusion portion 34 is provided on each standing wall surface 33. At least one of the concave portion and the convex portion extending in the irradiation direction D1 is formed side by side in the diffusion portion 34, and in the first embodiment, a so-called knurled portion in which the convex portions 34a extending in the irradiation direction D1 are formed in parallel in the vertical direction D2. (See FIG. 6). The diffusing section 34 may have recesses extending in the irradiation direction D1 arranged side by side in the up-down direction D2, and recesses and protrusions extending in the irradiation direction D1 are formed alternately in the up-down direction D2. Good. Each convex portion 34a is formed by 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) in the irradiation direction D1 to the front end of the standing wall surface 33 (the annular reflection of the incident point 23 located on the front side). It is provided in the range extending from the upper wall surface 31 to the lower wall surface 32 in the vertical direction D2. The diffusing section 34 (the standing wall surface 33) is configured to reflect light using total reflection.

As shown in FIG. 6, the light guide 22 is provided with an expanded portion 35. The expanded portion 35 is provided at an end portion of the light guide portion 24 on the front side in the irradiation direction D1, and has a thickness dimension larger than that of the light guide portion 24 in the vertical direction D2. The expanded portion 35 is an expanded upper wall surface 36 located above the upper wall surface 31 of the light guide portion 24 in the vertical direction D2, and an expanded 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. In the expanded portion 35, the expanded upper wall surface 36 is displaced from the upper wall surface 31 with a step upward to form an upper expanded portion 35a, and the expanded lower wall surface 37 is displaced downward from the lower wall surface 32 with a step. As a result, the lower expanded portion 35b is formed. Therefore, the expansion portion 35 is adjacent to the light guide portion 24 by being stepped by the upper extension portion 35a and the lower extension portion 35b so as to be expanded in the vertical direction D2 more than the light guide portion 24.

The expanded portion 35 forms the emission surface 25 by bridging the front end portions of the expanded upper wall surface 36 and the expanded lower wall surface 37 in the up-down direction D2. As a result, the emission surface 25 has a size larger than that of the light guide portion 24 in the vertical direction D2. Further, the expansion portion 35 is located at a position displaced from the front end of the light guide portion 24 to the front side of the front end portion of the light guide portion 24 by the expansion upper wall surface 36 and the expansion lower wall surface 37. The emission surface 25 is arranged. The extension portion 35 is supposed to extend in the lengthwise direction D4 at the end portion on the front side in the irradiation direction D1 in accordance with the light guide portion 24 of the light guide 22 extending in the lengthwise direction D4 ( 1 to 4). From these things, the up-down direction D2 is orthogonal to the irradiation direction D1, and the emission surface 25 functions as a thickness direction having a larger dimension than the light guide section 24. Further, the lengthwise 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 each light source 21 and each incident point 23 are arranged.

The expanded portion 35 of the first embodiment is provided so as to be displaced toward the front side in the irradiation direction D1 from the upper side in the vertical direction D2 toward the lower side. Therefore, the emitting surface 25 is inclined so as to be displaced to the front side in the irradiation direction D1 as going from the upper side to the lower side in the vertical direction D2. Then, as shown in FIG. 1 to FIG. 4, the emission surface 25 is in the longitudinal direction of the light guide body 22 while maintaining the above-described inclined state at the end portion of the light guide portion 24 on the front side in the irradiation direction D1. It is a long surface that extends along D4. Therefore, the emission surface 25 can be visually recognized as linear light by emitting light. The emitting surface 25 is provided with small rectangular protrusions (so-called prisms) arranged in an array, and enhances the design from the front side in the irradiation direction D1 and diffuses the emitted light. Therefore, the emission surface 25 can be visually recognized as a linear (line-shaped) light without unevenness.

In the vehicular lamp 10 of the first embodiment, in the lamp unit 20, electric power from the lighting control circuit is supplied from the substrate to the light source 21 to light the light source 21. Then, the outgoing light L from the light source 21 travels radially while centering on the outgoing optical axis, reaches the incident point 23, and travels from the incident point 23 into the light guide 22 to be parallel light (FIG. 5). The emitted light L travels toward the front side in the irradiation direction D1 in the light guide 22 (the light guide portion 24) and heads for the emission surface 25. The outgoing light L from the incident point 23 reaches the outgoing surface 25 of the expansion point 35 by advancing inside the light guide section 24 to the front side in the irradiation direction D1, and from the outgoing surface 25 to the expansion point 35 (the light guide 22). ) Is emitted to the outside. Here, the emitted light L from the incident portion 23 is basically a parallel light that travels along the irradiation direction D1, and therefore is output to the upper expanded portion 35a and the lower expanded portion 35b of the expanded portion 35. It is difficult for the light L to travel. As a result, on the emission surface 25, the emitted light L emitted from both end portions in the vertical direction D2 is extremely small, and there is a possibility that both upper and lower end portions become dark.

For this reason, in the vehicular lamp 10, the standing wall surface 33 in which the diffusing portion 34 is formed is provided so as to correspond to each incident point 23, that is, each light source 21 individually. In the light guide 22, out of the emitted light L emitted from each light source 21 and incident from each incident location 23, a part of the emitted light L1 which does not go to the annular reflecting surface 29 after passing through the annular incident surface 28 (FIG. 5) heads toward the vertical wall surface 33. In the example shown in FIG. 5, the outgoing light L1 traveling from the incident point 23 to the vertical wall surface 33 shows a state of passing through a point located inside the vehicle 1 with respect to the light source 21 on the annular incident surface 28. There may be a case where the surface 28 passes through a portion located in the vertical direction D2 with respect to the light source 21. Here, the emitted light L1 traveling from the incident point 23 to the standing wall surface 33 is basically directed to the standing wall surface 33 in a direction close to the irradiation direction D1 (having a small vector component in the vertical direction D2). However, since the emitted light L1 is provided with the diffusing portion 34 in which the plurality of convex portions 34a extend in the irradiation direction D1 on the standing wall surface 33, it is reflected by the diffusing portion 34 (the convex portion 34a) and diffused. A part of the traveling direction is changed to the direction inclined to the vertical direction D2 side (the vector component of the vertical direction D2 is large).

Since each of the convex portions 34a extends in the irradiation direction D1, the emitted light L maintains the vector component in the irradiation direction D1 toward the expansion portion 35. For these reasons, the outgoing light L reflected and diffused by the diffusing section 34 is directed to the expanded portion 35 while the traveling direction is the direction inclined to the vertical direction D2 side. As a result, at least a part of the emitted light L from the diffusing portion 34 advances to the upper expanded portion 35a and the lower expanded portion 35b in the expanded portion 35, and also from both end portions of the outgoing surface 25 in the vertical direction D2. The emitted light L can be positively emitted, and the emission surface 25 can be uniformly emitted in the vertical direction D2.

Here, in the vehicular 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. .. Therefore, the emission surface 25 has, in the irradiation direction D1, a portion facing each of the incident portions 23 (each light source 21) and a portion facing each other (hereinafter, also referred to as an intermediate portion) alternately arranged. .. From this, when only the emitted light L which is the parallel light from each of the incident portions 23 is guided to the emitting surface 25, the emitted light L cannot be emitted from the intervening portion, and there are bright portions and dark portions. Will be arranged alternately. On the other hand, in the vehicular lamp 10, since the standing wall surface 33 (diffusing portion 34) is provided from each incident point 23 to the inside of the vehicle 1, the emitted light L1 traveling from each incident point 23 to each standing wall surface 33 is generated. By being reflected by the standing wall surface 33, a part of the emitted light L1 can be made to travel to each interspace portion outside the incident points 23. Further, since the standing wall surface 33 is provided so as to extend from the corresponding entrance location 23 to the front side in the irradiation direction D1, the outgoing light L1 from the entrance location 23 enters various positions in the irradiation direction D1, and thus the standing wall surface 33. It is possible to make the light travel toward the exit surface 25 at various angles outside 33, and it is possible to prevent the reflected exit light L1 from concentrating in a narrow range and proceed to the interspace. In addition, in the vehicular lamp 10, since the emitting surface 25 is extended in the longitudinal direction D4 and the incident portions 23 are arranged side by side, the interval between each standing wall surface 33 and each interspace portion can be reduced, and a part of the emitted light L1 can be obtained. Can be efficiently advanced to each inter-part outside the respective incident points 23. From these things, in the vehicular lamp 10, it is possible to positively guide the emitted light L also to the respective portions on the emission surface 25, and it is possible to prevent bright portions and dark portions from being arranged alternately. The emission surface 25 can be made to illuminate uniformly as a whole even in the longitudinal direction D4.

Therefore, in the vehicular lamp 10, the emitted light L from each light source 21 can be emitted from the entire emission surface 25 including both upper and lower ends, and the unevenness extending along the emission surface 25 in the longitudinal direction D4. It can be visually recognized as a linear light. As a result, the vehicular lamp 10 can be visually recognized in the vertical direction D2 and the width direction D3 on the front side of the vehicle 1 by shining the emission surface 25 over the entire surface, and functions as a DRL in the vehicle 1 (FIG. 1).

Next, a conventional vehicle lamp will be described. In the conventional vehicle lamp, by smoothly connecting the light guide portion to the emission surface, the emission light from the light source guided by the light guide portion to the front side in the irradiation direction can be spread over the entire emission surface. It is possible to make effective use of the light emitted from the light source and to illuminate the entire emission surface. Therefore, in the conventional vehicular lamp, in order to increase the vertical dimension (thickness direction) of the emission surface, 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, in the light guide, when the thickness of the light guide is increased, waviness and sink marks are likely to occur in the light guide due to the molding shrinkage of the resin material when molding using a mold, There is a limit to increasing the thickness of the light guide section.

Here, in the conventional vehicle lighting device, similarly to the vehicle lighting device 10 of the first embodiment, a step is provided on the front side in the irradiation direction of the light guide portion to provide an extension portion to increase the vertical dimension of the emission surface. It is possible. However, in the conventional vehicular lamp, even if the extension portion is simply provided and the vertical dimension of the emission surface is increased, the emitted light travels to the upper extension portion and the lower extension portion of the extension portion as described above. Becomes difficult. Therefore, in the conventional vehicular lamp, even if the emission surface is enlarged due to the expanded portion, the upper and lower ends of the emission surface become dark, and thus the substantial vertical dimension of the emission surface (size of the emission surface). Changes little and cannot be increased. For these reasons, the conventional vehicular lamp is limited in increasing the emission surface.

On the other hand, in the vehicular lamp 10 according to the first exemplary embodiment, in the light guide portion 24 of the light guide 22 of the lamp unit 20, a plurality of convex portions 34a extending in the irradiation direction D1 are formed in parallel in the vertical direction D2. An upright wall surface 33 having a diffusion portion 34 is provided. In the vehicle lamp 10, the expansion portion 35 is provided 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. Therefore, the vehicular lamp 10 is provided with the standing wall surface 33 having the diffusing portion 34 while the extension portion 35 is provided to make the size of the emitting surface 25 in the up-down direction D2 larger than that of the light guide portion 24. The emitted light L can be advanced to the upper expansion portion 35a and the lower expansion portion 35b of the expansion portion 35. As a result, the vehicular lamp 10 can make the upper and lower ends of the emitting surface 25 brighter and can make the emitting surface 25 large without increasing the size of the light guide portion 24 in the vertical direction D2. it can.

In addition, in the vehicular lamp 10 according to the first exemplary embodiment, the emission surface 25 is located at a position where the expansion portion 35 is displaced forward from the front end of the light guide portion 24 by the expansion upper wall surface 36 and the expansion lower wall surface 37. Are arranged, the outgoing light L reflected by the diffusing portion 34 and having a traveling direction inclined toward the vertical direction D2 side travels to the upper expanded portion 35a and the lower expanded portion 35b of the expanded portion 35. Making it easier. Therefore, in the vehicular lamp 10, the emission surface 25 can be made large without increasing the size of the light guide portion 24 in the up-down direction D2 while making it possible to surely brighten both upper and lower ends of the emission surface 25. can do.

The vehicular lamp 10 of the first exemplary embodiment can obtain the following operational effects.

In the vehicle lamp 10, in the light guide 22, the emission surface 25 has a larger dimension in the thickness direction (vertical direction D2 in the first embodiment) than the light guide section 24, and the standing wall surface 33 having the diffusion section 34 is guided. It is provided in the section 24. Therefore, the vehicular lamp 10 can be caused to travel in the direction inclined to the vertical direction D2 side by reflecting and diffusing a part of the outgoing light L emitted from the light source 21 at the diffusing section 34. Accordingly, the vehicular lamp 10 can positively emit the emitted light L from both ends in the up-down direction D2 of the emission surface 25 having a thickness larger than that of the light guide portion 24. Therefore, the vehicular lamp 10 positively emits the emitted light L from both end portions in the up-down direction D2 of the emission surface 25 that is thicker than the light guide portion 24 while preventing the light guide portion 24 from increasing in thickness. The light can be emitted in a desired manner, and the emission surface 25 can be enlarged.

In the vehicular lamp 10, the diffusing portion 34 is formed by arranging at least one of the concave portion and the convex portion (a plurality of convex portions 34a in the first embodiment) extending in the irradiation direction D1 in parallel. Therefore, the vehicular lamp 10 tilts toward the vertical direction D2 while maintaining the vector component of the irradiation direction D1 by reflecting and diffusing a part of the outgoing light L emitted from the light source 21 at the diffusing section 34. You can proceed in the direction you did. As a result, in the vehicular lamp 10, the outgoing light L reflected and diffused by the diffusing portion 34 is more positively emitted from both end portions in the up-down direction D2 of the emitting surface 25 having a thickness larger than that of the light guide portion 24. Can be made.

The vehicle lamp 10 is provided with a plurality of light sources 21 arranged side by side in the inclination direction (longitudinal direction D4 in the first embodiment), and a plurality of incident points 23 are provided in the light guide body 22 corresponding to the light sources 21, respectively. A plurality of standing wall surfaces 33 are provided on the light guide 22 so as to individually correspond to 23. Therefore, the vehicle lamp 10 has a thickness larger than that of the light guide portion 24 by reflecting and diffusing the outgoing light L incident from each of the incident portions 23 by the corresponding diffusing portion 34 of the vertical wall surface 33. The outgoing light L is actively advanced to both ends of the outgoing surface 25 in the vertical direction D2. As a result, in the vehicular lamp 10, even as the emission surface 25 extending in the lengthwise direction D4, the light guide section 24 causes the emission light L from the plurality of light sources 21 and the incident points 23 arranged in the lengthwise direction D4 to be described above. You can guide as you did. Therefore, the vehicular lamp 10 can illuminate the emission surface 25 over the entire lengthwise direction D4 while brightening both end portions in the vertical direction D2.

The vehicular lamp 10 is provided with each standing wall surface 33 across two adjacent incident points 23. Therefore, in the vehicle lamp 10, each standing wall surface 33 having the diffusing portion 34 can be provided by utilizing the space between two adjacent incident points 23 that are generated by arranging the incident points 23 side by side in the inclination direction. Therefore, the entire emission surface 25, which is larger than the light guide portion 24, can be illuminated while enabling miniaturization.

In the vehicle lamp 10, the light guide 22 is provided with an expansion portion 35 that is stepped more than the light guide portion 24 and expanded in the up-down direction D2 (thickness direction) 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 of the expanded portion 35 in the irradiation direction D1. For this reason, in the vehicular lamp 10, the emission surface 25 can be more reliably made to have a large thickness while preventing the thickness of the light guide portion 24 from increasing, and the emission surface 25 is reflected by the diffusion portion 34. Both ends in the vertical direction D2 can be illuminated.

Therefore, in the vehicular lamp 10 according to the first embodiment as the vehicular lamp according to the present disclosure, the emission surface 25 can be increased while limiting the thickness of the light guide portion 24.

The vehicular lamp of the present disclosure has been described above based on the first embodiment, but the specific configuration is not limited to the first embodiment, and deviates from the gist of the invention according to each claim of the claims. Unless otherwise, design changes and additions are allowed.

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

In the first embodiment, in the light guide 22, the light L emitted from the light source 21 corresponding to each incident location 23 is guided as parallel light to the front side in the irradiation direction D1. However, each incident location 23 has an adjustment reflection location 38 (see FIG. 7) that reflects the emitted light L from the light source 21 toward the standing wall surface 33 (its diffusion portion 34) on at least a part of the annular reflection surface 29. It may be provided. The adjustment reflection portion 38 reflects the emitted light L emitted from the light source 21 and traveling to itself through the annular incident surface 28 of the recess 26 to the standing wall surface 33, so that the adjustment reflecting portion 38 travels to the standing wall surface 33. The amount of light L (light amount) is adjusted. FIG. 7 shows an incident point 23A as a modified example having such a configuration. The incident portion 23A is a portion of the annular reflecting surface 29, which is located on the vertical wall surface 33 side (inside the vehicle 1) with respect to the light source 21, as an adjusting reflecting portion 38. Therefore, the vehicular lamp 10 of the modified example can positively advance the outgoing light L2 of the outgoing light L, which is reflected at the adjustment reflection portion 38, to the standing wall surface 33, and the upper expanded portion of the expanded portion 35. The emitted light L2 can be more positively advanced to the 35a and the lower extension portion 35b. As a result, in the vehicular lamp 10 of the modified example, the light to be controlled can be advanced to the standing wall surface 33. Therefore, by adjusting the position and size of the adjustment reflection portion 38, the light exiting surface 25 can be adjusted. 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 the incident point 23A of the modified example, the adjustment reflection point 38 was provided on the annular reflection surface 29 on the side of the standing wall surface 33 of the light source 21, but a part of the outgoing light L passing through the annular incidence surface 28 is set up on the standing wall surface. As long as it is provided in a part of the annular reflecting surface 29 so as to reflect the light toward the surface 33, the shape, position, size, etc. may be set as appropriate, and is not limited to the example of FIG. 7.

In the first embodiment, the annular reflecting surface 29, the standing wall surface 33 (diffusing portion 34), and the adjusting reflection portion 38 are supposed to reflect using total reflection. However, as long as each surface (29, 33, 34, 38) reflects the emitted light L from the light source 21 so as to have the above-mentioned function, aluminum or silver or the like is formed by vapor deposition, painting or the like as a light guide. The emitted light L may be reflected by being adhered to 22 and may have another configuration, and is not limited to the configuration of the first embodiment.

In the first embodiment, the emission surface 25 and the light guide section 24 have the shapes shown in FIGS. 2 to 7. However, other configurations may be used as long as the light guide section 24 guides the outgoing light L from the light source 21 to the outgoing surface 25 and emits it from the outgoing surface 25 to the front side in the irradiation direction D1. The configuration is not limited to 1.

In the first embodiment, the diffusion portion 34 is provided over the entire surface of the standing wall surface 33. However, the diffusing portion 34 is formed by arranging at least one of the concave portion and the convex portion extending in the irradiation direction D1 in parallel, and positively emits light from both end portions of the emitting surface 25 in the vertical direction D2. As long as the emitted light L is reflected, 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 the first embodiment, the expanded portion 35 is expanded to both sides in the vertical direction D2 (thickness direction) with respect to the light guide portion 24, that is, the upper expanded portion 35a and the lower expanded portion 35b are provided. However, the expanded portion 35 is expanded in the thickness direction with a step different from that of the light guide section 24 on the front side of the light guide section 24 in the irradiation direction D1, and the emission surface 25 is formed at the front end in the irradiation direction D1. As long as it is provided, the light guide portion 24 may be extended in only one direction in the thickness direction, and the configuration is not limited to that of the first embodiment.

10 Vehicle Lamp 21 Light Source 22 Light Guide 23, 23A Incident Point 24 Light Guide 25 Emitting Surface 26 Recess 29 Annular Reflecting Surface 33 Standing Wall 34 Diffusing Part 34a Convex 35 Expanding Point 38 Adjusting Reflecting Point D1 Irradiation Direction D2 Up and Down Direction (thickness direction) D4 Long direction (tilt direction) L Emitted light

Claims (6)

A light source; and a light guide body that guides the light emitted from the light source to the front side in the irradiation direction,
The light guide body, a light guide portion that guides the emitted light from the light source to the front side in the irradiation direction,
An emission surface for emitting the emitted light guided by the light guide section to the front side in the irradiation direction,
The emission surface has a size larger than that of the light guide portion in a thickness direction orthogonal to the irradiation direction,
The light guide section has a standing wall surface extending in the irradiation direction,
A vehicular lamp, wherein the standing wall surface is provided with a diffusion portion at least in part. The vehicular lamp according to claim 1, wherein at least one of a concave portion and a convex portion extending in the irradiation direction is arranged side by side in the diffusion portion. A plurality of the light sources are provided side by side in an inclination direction inclined with respect to a surface including the irradiation direction and the thickness direction,
The light guide body has a plurality of incident points individually corresponding to the plurality of light sources,
The vehicular lamp according to claim 1 or 2, wherein a plurality of the upright wall surfaces are provided so as to individually correspond to the plurality of incident positions. The vehicular lamp according to claim 3, wherein the standing wall surface is provided so as to bridge two adjacent incident points. The plurality of incident points have a recessed portion where a portion of the light guide section facing the light source is partially recessed, and an annular reflective surface surrounding the recessed portion,
The at least one part of the said annular reflective surface is made into the adjustment reflection part which reflects the said emitted light which passed the said recessed part from the said light source toward the said standing wall surface, The said 3rd or Claim. The vehicle lamp according to item 4. The light guide has, on the front side in the irradiation direction of the light guide section, an expansion portion that is expanded in the thickness direction with a step higher than the light guide section,
The vehicular lamp according to any one of claims 1 to 5, wherein the emission surface is formed at an end portion of the expanded portion on the front side in the irradiation direction.