Vehicular lighting fixture

Abstract

To provide a vehicular lighting fixture which has a large light emitting area, and which can emit light with a desired light amount, with a simple structure.SOLUTION: A vehicular lighting fixture includes: a first light source; a second light source; and a light guide body for guiding the light from the first light source and the second light source. The light guide body includes: a rod-like guide part for guiding the light emitted from the first light source; a tabular first light emitting part provided so as to extend from a lateral side of the guide part, and having an emission surface for emitting light which has entered from the guide part and guided, and a reflection surface which is opposed to the emission surface and in which a plurality of optical steps is formed for reflecting the light which has entered from the guide part toward the emission surface; and a second light emitting part having an emission surface for emitting the light emitted from the second light source. The second light source is arranged so that a light emission surface faces the emission direction of the light of the second light emitting part part.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a vehicle lamp. [Background technology]

[0002] Patent Document 1 discloses a vehicle lamp that realizes functions such as a side marker lamp by making light emitted from a light-emitting element enter a light guide and reflecting the light by a reflective structure provided inside the light guide. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-93325 Summary of the Invention [Problem to be solved by the invention]

[0004] In a vehicle lamp such as that disclosed in Patent Document 1, it is desired that the light emitting area is large and that the light is emitted with a desired amount of light.

[0005] An object of the present disclosure is to provide a vehicle lamp that has a simple configuration, a large light-emitting area, and is capable of emitting a desired amount of light. [Means for solving the problem]

[0006] A vehicle lamp according to one aspect of the present disclosure includes: The first light source, A second light source; a light guide that guides light from the first light source and the second light source; Equipped with The light guide is A rod-shaped guide portion that guides the light emitted from the first light source; a plate-like first light-emitting section that is provided so as to extend from a side of the guide section and has an exit surface that emits light that is incident from the guide section and guided therethrough, and a reflecting surface that faces the exit surface and has a plurality of optical steps formed thereon that reflects the light that is incident from the guide section toward the exit surface; A second light emitting unit having an exit surface that emits light emitted from the second light source; having The second light source is disposed so that a light emission surface faces the direction in which light is emitted from the second light emitting portion.

[0007] According to this configuration, the light emitted from the first light source and guided by the guide portion enters the plate-shaped first light-emitting portion and is diffusely reflected by the optical steps, so that a large light-emitting area and uniform light can be emitted. Also, the light emitted from the second light source enters the second light-emitting portion and is emitted from the exit surface, so that a higher amount of light can be emitted than the light emitted from the first light-emitting portion. This makes it possible to provide a vehicle lamp that has a large light-emitting area and can emit a desired amount of light with a simple configuration. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a vehicle lamp that has a large light-emitting area and is capable of emitting a desired amount of light. [Brief description of the drawings]

[0009] [Figure 1] 2 illustrates an example of the arrangement of side marker lamps according to the present embodiment mounted on a vehicle. [Diagram 2] 2 illustrates an example of the configuration of a side marker lamp according to the present embodiment. [Diagram 3] 3 illustrates a cross section taken along line III-III in FIG. 2, viewed from the direction of the arrows. [Figure 4] 1 illustrates an example of an extension and light guide configuration. [Diagram 5] 1 illustrates a configuration seen from the light exit surface side of a light guide body. [Figure 6]The configuration is shown as seen from the opposite side to the light exit surface of the light guide. [Figure 7] 1 illustrates an example of a positional relationship between a light guide and a first light emitting element. [Figure 8] 1 illustrates a portion of a reflective surface of a first light-emitting portion of a light guide. [Figure 9] 9 illustrates a cross section taken along line IX-IX in FIG. 5, viewed from the direction of the arrows. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, examples of embodiments will be described in detail with reference to the accompanying drawings. In the drawings used in the following description, the scale is changed as necessary so that each component can be clearly seen.

[0011] In the accompanying drawings, arrow F indicates the forward direction of the illustrated structure. Arrow B indicates the rearward direction of the illustrated structure. Arrow U indicates the upward direction of the illustrated structure. Arrow D indicates the downward direction of the illustrated structure. Arrow R indicates the rightward direction of the illustrated structure. Arrow L indicates the leftward direction of the illustrated structure. These directional expressions are intended to be used for convenience of explanation and are not intended to limit the position of the structure during actual use.

[0012] Fig. 1 is a schematic diagram illustrating the arrangement of a side marker lamp 10 according to this embodiment mounted on a vehicle 20. As shown in Fig. 1, the side marker lamp 10 is configured as a part of a rear combination lamp 30 provided at the rear of the vehicle 20, for example. The rear combination lamp 30 has a plurality of lamps that perform different functions. Specifically, the rear combination lamp 30 includes, in addition to the side marker lamp 10, tail lamps, turn signal lamps, stop lamps, and other lamps.

[0013] The side marker lamps 10 are arranged, for example, on the left and right side surfaces of the rear of the vehicle 20. The side marker lamps 10 on the left side surface of the vehicle 20 and the side marker lamps 10 on the right side surface of the vehicle 20 have a symmetrical structure. The configuration of the side marker lamp 10 on the right side surface of the vehicle 20 will be described below.

[0014] Fig. 2 illustrates the configuration of the side marker lamp 10 according to this embodiment. Fig. 2 illustrates the configuration of the side marker lamp 10 as viewed from the right side of the vehicle 20. Fig. 3 illustrates the configuration of a cross section taken along line III-III in Fig. 2 as viewed from the direction of the arrows. Fig. 4 illustrates the configuration of the extension 17 and the light guide 16.

[0015] 3, the side marker lamp 10 includes a lamp body 11 with an opening (not shown) and an outer cover 12 formed to cover the opening of the lamp body 11. The lamp body 11 and the outer cover 12 define a lamp chamber 13. The outer cover 12 is made of, for example, a red translucent resin material. In this example, the lamp body 11 and the outer cover 12 form a part of the housing of the rear combination lamp 30.

[0016] The side marker lamp 10 includes a first light emitting element 14 (see FIG. 7), a second light emitting element 15, a light guide 16, and an extension 17 within a lamp chamber 13.

[0017] The first light-emitting element 14 and the second light-emitting element 15 are arranged to emit light toward the light guide 16. The first light-emitting element 14 and the second light-emitting element 15 are, for example, white LEDs. The first light-emitting element 14 is an example of a first light source. The second light-emitting element 15 is an example of a second light source.

[0018] The light guide 16 is configured to guide the light emitted from the first light emitting element 14 and the second light emitting element 15 and emit the guided light from the emission surface 16a to the front of the lamp (to the right in this example). The light guide 16 is formed by injection molding a transparent resin member such as acrylic or polycarbonate.

[0019] The extension 17 is formed so as to cover the emission surface 16a of the light guide 16. As shown in Fig. 4, the extension 17 has a plurality of openings 171, and a portion of the emission surface 16a of the light guide 16 is exposed from the openings 171. Specifically, the plurality of openings 171 are formed so that a portion of the emission surface 162a of the first light-emitting portion 162 and a portion of the emission surface 163a of the second light-emitting portion 163 of the light guide 16 are exposed. The extension 17 is made of, for example, a gray opaque resin member.

[0020] The light emitted from the first light-emitting element 14 and the second light-emitting element 15 and guided inside the light guide 16 is emitted as white light in front of the lamp from the emission surface 16a of the light guide 16. The white light emitted from the emission surface 16a of the light guide 16 passes through the multiple openings 171 of the extension 17, transmits through the red outer cover 12, and is irradiated in front of the lamp and is visually recognized as multiple red lights extending in the horizontal direction.

[0021] Next, the specific structure of the light guide 16 will be described with reference to FIG. 3 and FIG. 5 to FIG. FIG. 5 illustrates a configuration seen from the side of the light guiding body 16's emission surface 16a. In FIG. 5, the positions where the first light emitting element 14 and the second light emitting element 15 are arranged are indicated by + marks. FIG. 6 illustrates a configuration seen from the side opposite the light guiding body 16's emission surface 16a. FIG. 7 illustrates a positional relationship between the light guiding body 16 and the first light emitting element 14. FIG. 8 illustrates a part of the reflecting surface 162b of the first light emitting portion 162 of the light guiding body 16. FIG. 9 illustrates a configuration seen from the direction of the arrows in a cross section taken along the line IX-IX in FIG. 5.

[0022] 5, the light guide 16 includes a guide portion 161, a first light emitting portion 162, and a second light emitting portion 163. The guide portion 161 is configured to guide the light emitted from the first light emitting element 14. Specifically, the guide portion 161 is formed in a rod shape, and one end surface in the longitudinal direction is configured as a light incident portion 1611 into which the light from the first light emitting element 14 is incident. In this example, the light incident portion 1611 is formed on the upper end surface of the guide portion 161, and the guide portion 161 is inclined backward as it moves downward from the light incident portion 1611.

[0023] 7, the first light-emitting element 14 is disposed with its light emission direction facing the upper end surface, which is the light incident portion 1611, of the guide portion 161. Specifically, the first light-emitting element 14 is disposed with its light emission surface 141 facing the upper end surface, which is the light incident portion 1611, of the guide portion 161. In this example, the guide portion 161 extends obliquely, and the first light-emitting element 14 is disposed with its light emission direction aligned with the longitudinal direction of the guide portion 161. The first light-emitting element 14 is mounted on a substrate 18, and the substrate 18 is attached to an attachment portion (not shown) formed on the upper end surface of the guide portion 161.

[0024] 5, the first light-emitting portion 162 is formed in a plate shape and is provided so as to extend from the side of the guide portion 161. In this example, the first light-emitting portion 162 is provided so as to extend from the rear of the guide portion 161 along the front-rear direction.

[0025] The first light-emitting portion 162 is formed such that a width W of the first light-emitting portion 162 in a direction extending from the guide portion 161 becomes narrower with increasing distance from the first light-emitting element 14. In this example, the first light-emitting portion 162 is formed such that a width W in the front-rear direction becomes narrower with increasing distance from the first light-emitting element 14 in a downward direction.

[0026] 3, first light-emitting portion 162 has exit surface 162a and reflecting surface 162b facing exit surface 162a. Light that enters first light-emitting portion 162 from guide portion 161 and is guided inside first light-emitting portion 162 is reflected by reflecting surface 162b toward exit surface 162a, and is emitted from exit surface 162a in a direction intersecting the direction extending from guide portion 161 (to the right in this example).

[0027] 6, the entire surface facing the exit surface 162a is formed as the reflecting surface 162b. A plurality of optical steps 162b1 are formed on the reflecting surface 162b. The light guided through the first light-emitting section 162 and reaching the reflecting surface 162b is diffusely reflected by the optical steps 162b1 toward the exit surface 162a.

[0028] Fig. 8 shows an example of the shape of the optical steps 162b1. As shown in Fig. 8, the optical steps 162b1 are arranged in a staggered pattern. That is, the optical steps 162b1 are arranged alternately between opposing columns (or opposing rows). In this example, the optical steps 162b1 have a triangular pyramid shape having a substantially triangular cross section.

[0029] The thickness between the reflecting surface 162b and the emitting surface 162a of the first light-emitting portion 162 differs between a portion continuous with the second light-emitting portion 163 and a portion continuous with the guide portion 161. Specifically, as shown in Fig. 5, the upper portion of the first light-emitting portion 162 is formed continuous with the second light-emitting portion 163 extending from the side of the upper portion of the guide portion 161, and the portion other than the upper portion of the first light-emitting portion 162 is formed continuous with the side of the guide portion 161.

[0030] As shown in Figure 9, the first light-emitting portion 162 is formed so that the thickness D2 of the portion that is not continuous with the second light-emitting portion 163 in the direction extending from the guide portion 161 is smaller than the thickness D1 of the portion that is continuous with the second light-emitting portion 163 in the direction extending from the guide portion 161.

[0031] 5, as described above, the second light-emitting portion 163 is disposed between the upper portion of the first light-emitting portion 162 and the upper portion of the guide portion 161, and extends from the side of the upper portion of the guide portion 161. The second light-emitting portion 163 is disposed in the vicinity of the first light-emitting element 14 disposed opposite the upper end of the guide portion 161.

[0032] As shown in Fig. 3, Fig. 5 and Fig. 6, the second light-emitting section 163 has an emission surface 163a and a light incident section 163b facing the emission surface 163a. ​​The emission surface 163a, together with the emission surface 162a of the second light-emitting section 163, forms the emission surface 16a of the light guide 16. A part of the light that enters the second light-emitting section 163 and is guided inside the second light-emitting section 163 is emitted from the emission surface 163a. ​​As shown in Fig. 7, a plurality of fisheye steps 163a1 are formed on the emission surface 163a.

[0033] 3, the light incident portion 163b is configured to output the light emitted from the second light emitting element 15 as parallel light toward the emission surface 163a. ​​The light incident portion 163b forms parallel light by, for example, total reflection on the inner surface.

[0034] The second light-emitting element 15 is disposed such that the light emission direction faces the light incident portion 163b. Specifically, the second light-emitting element 15 is disposed such that the light emission surface 151 faces the light incident portion 163b. The light emitted from the second light-emitting element 15 and incident from the light incident portion 163b to the second light-emitting portion 163 is emitted from the emission surface 163a. ​​In other words, the second light-emitting element 15 is disposed such that the light emission surface 151 faces the light emission direction of the second light-emitting portion 163.

[0035] 3 and 6, the second light-emitting portion 163 has a reflecting portion 163c. The reflecting portion 163c is disposed around the light incident portion 163b. The reflecting portion 163c has a plurality of optical steps 163c1 formed therein. A portion of the light incident from the guide portion 161 to the second light-emitting portion 163 is reflected by the optical steps 163c1 toward the exit surface 162a.

[0036] In the side marker lamp 10 configured in this manner, when the first light-emitting element 14 is turned on, light incident from an upper end surface, which is the light incident portion 1611 of the guide portion 161 of the light guide body 16, is guided toward a lower end surface of the guide portion 161 while being reflected within the guide portion 161. At this time, a part of the light guided within the guide portion 161 is incident on the first light-emitting portion 162 or the second light-emitting portion 163 from the side of the guide portion 161. The light incident on the first light-emitting portion 162 from the guide portion 161 is guided within the first light-emitting portion 162, diffusely reflected by a plurality of optical steps 162b1 formed on the reflecting surface 162b of the first light-emitting portion 162, and is emitted from the emission surface 162a.

[0037] A portion L1 (see FIG. 3) of the light incident on the second light-emitting portion 163 from the guide portion 161 passes through the second light-emitting portion 163, enters the first light-emitting portion 162, is diffusely reflected by the optical step 162b1 of the reflecting surface 162b, and is emitted from the exit surface 162a. Also, a portion of the light incident on the second light-emitting portion 163 from the guide portion 161 is reflected by the reflecting portion 163c of the second light-emitting portion 163, and is emitted from the exit surface 163a.

[0038] On the other hand, when the second light-emitting element 15 is turned on, light L2 (see FIG. 3) incident from the light incident portion 163b of the second light-emitting portion 163 of the light guide 16 becomes parallel light, travels through the second light-emitting portion 163, and is emitted from the emission surface 163a. ​​Since a plurality of fisheye steps 163a1 are formed on the emission surface 163a, the light emitted from the emission surface 163a is diffused.

[0039] In this way, the light emitted from the exit surface 162a and the exit surface 163a by turning on the first light-emitting element 14 and the second light-emitting element 15 passes through the opening 171 of the extension 17 and further passes through the outer cover 12 to be emitted forward of the lamp.

[0040] As described above, according to the side marker lamp 10 of this embodiment, the light emitted from the first light-emitting element 14 and guided by the guide portion 161 enters the plate-shaped first light-emitting portion 162 and is diffusely reflected by the optical step 162b1, so that it is possible to emit light with a large light-emitting area and with a uniform light. Moreover, the light emitted from the second light-emitting element 15 enters the second light-emitting portion 163 and is emitted from the emission surface 163a, so that it is possible to emit a higher amount of light than the light emitted from the first light-emitting portion 162. This makes it possible to realize a lamp that has a large light-emitting area and can emit a desired amount of light with a simple configuration.

[0041] In addition, in this embodiment, the reflecting surface 162b of the first light-emitting portion 162 has a plurality of optical steps 162b1 arranged in a staggered pattern, so that uniform light emission can be achieved.

[0042] In addition, in this embodiment, since a plurality of fisheye steps 163a1 are formed on the emission surface 163a of the second light-emitting portion 163, high light diffusion properties can be ensured.

[0043] Furthermore, in this embodiment, the thickness D1 of the portion of the first light-emitting section 162 that is continuous with the second light-emitting section 163 is thicker than the thickness D2 of the portion that is not continuous with the second light-emitting section 163. Therefore, when light from the guide section 161 enters the first light-emitting section 162 via the second light-emitting section 163, it can enter the first light-emitting section 162 without being blocked by the second light-emitting section 163.

[0044] Furthermore, in this embodiment, the width of first light-emitting portion 162 becomes narrower as it moves away from first light-emitting element 14. As it moves away from first light-emitting element 14, less light is guided inside guide portion 161, and less light is guided from guide portion 161 to first light-emitting portion 162; however, since the width of first light-emitting portion 162 becomes narrower, it is possible to emit uniform light regardless of the position from first light-emitting element 14.

[0045] In this embodiment, the second light-emitting portion 163 is disposed in the vicinity of the first light-emitting element 14. Since the portion of the guide portion 161 closer to the first light-emitting element 14 emits light more strongly, the strongly emitting portion of the guide portion 161 and the strongly emitting second light-emitting portion 163 are located in close proximity to each other. This allows the light emitted from the side marker lamp 10 to have a uniform feel without causing a sense of incongruity.

[0046] In this embodiment, the guide portion 161 extends obliquely, and the first light-emitting element 14 is disposed so that the light emission direction is along the longitudinal direction of the guide portion 161. This makes it easier for the light emitted from the first light-emitting element 14 to enter the guide portion 161 and to be guided along the longitudinal direction of the guide portion 161.

[0047] The present disclosure is not limited to the above-described embodiment, and can be freely modified, improved, etc. as appropriate. In addition, the material, shape, size, numerical value, form, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present disclosure can be achieved, and are not limited.

[0048] In the above embodiment, the side marker lamp 10 has been described as an example of the vehicle lamp according to the present disclosure. However, the vehicle lamp according to the present disclosure may also be used as a lamp having a different function.

[0049] In the above embodiment, the second light-emitting portion 163 is disposed between the upper portion of the first light-emitting portion 162 and the upper portion of the guide portion 161. However, a configuration in which the second light-emitting portion 163 is disposed at any position, such as between the lower portion of the first light-emitting portion 162 and the lower portion of the guide portion 161, may also be adopted. [Explanation of symbols]

[0050] 10 Side marker lamp 11 Lamp body 12 Outer cover 13 Light room 14 First light emitting element 141 Light exit surface 15 Second light emitting element 151 Light exit surface 16 Light guide 16a Output surface 161 Guide part 1611 Light entrance part 162 First light emitting part 162a Output surface 162b Reflective surface 162b1 Optical Step 163 Second Light Emitting Unit 163a Output surface 163a1 Fisheye Step 163b Light incidence part 163c Reflector 163c1 Optical Step 17 Extension 171 Aperture 18 Substrate 20 Vehicles 30 Rear combination lamp

Claims

1. The first light source, A second light source; a light guide that guides light from the first light source and the second light source; Equipped with The light guide is A rod-shaped guide portion that guides the light emitted from the first light source; a plate-like first light-emitting section that is provided so as to extend from a side of the guide section and has an exit surface that emits light that is incident from the guide section and guided therethrough, and a reflecting surface that faces the exit surface and has a plurality of optical steps formed thereon that reflects the light that is incident from the guide section toward the exit surface; A second light emitting unit having an exit surface that emits light emitted from the second light source; having The second light source is disposed so that a light emission surface faces a direction in which light is emitted from the second light emitting portion.

2. The vehicular lamp according to claim 1 , wherein the optical steps are arranged in a staggered pattern.

3. The vehicular lamp according to claim 1 , wherein a plurality of fisheye steps are formed on the light exit surface of the second light emitting portion.

4. the second light emitting portion is disposed between a portion of the guide portion and a portion of the first light emitting portion, 2. The vehicular lamp according to claim 1, wherein a thickness between the reflective surface and the emission surface in the first light-emitting portion is smaller in a portion that is not continuous with the second light-emitting portion in the direction extending from the guide portion than in a portion that is continuous with the second light-emitting portion in the direction extending from the guide portion.

5. The vehicular lamp according to claim 1 , wherein a width of the first light-emitting portion in the direction extending from the guide portion becomes narrower with increasing distance from the first light source.

6. The vehicular lamp according to claim 1 , wherein the second light emitting portion is disposed in the vicinity of the first light source.

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