Vehicular lighting fixture

Abstract

To provide a vehicular lighting fixture capable of improving appearance at the time of lighting.SOLUTION: A vehicular lighting fixture 10 comprises a light source, a long light guide body 20 for guiding light from the light source, a reflector 40 for reflecting one part of light emitted from the light guide body, and a fist inner lens 50 for diffusing the light emitted from the light guide body 20 and reflected by the reflector 40, and emitting the light forward of the lighting fixture. The first inner lens 50 has a first diffusion region 51a covering an emission face 22a of the light guide body 20, and a second diffusion region 51b continued to the first diffusion region 51a and extending in a direction away from the light guide body 20. The reflector 40 has a first reflection region 43 opposite to the second diffusion region 51b of the first inner lens 50, and a second reflection region 44 positioned on the second diffusion region 51b side. A front end 43a of the first reflection region 43 projects toward the first inner lens 50 more than a front end 44a of the second reflection region 44.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] For example, Patent Document 1 discloses a vehicle lamp that can be used as a tail lamp. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-76249 A 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 desirable to further improve the appearance when lit.

[0005] An object of the present disclosure is to provide a vehicle lamp that can improve the appearance when lit. [Means for solving the problem]

[0006] A vehicle lamp according to one aspect of the present disclosure includes: A light source; an elongated light guide that guides the light emitted from the light source; a reflector that reflects a portion of the light emitted from the light guide; A first inner lens that diffuses the light emitted from the light guide and the light reflected by the reflector and emits the light in front of the lamp; Equipped with The first inner lens has a first diffusion region covering the exit surface of the light guide and a second diffusion region extending continuously from the first diffusion region in a direction away from the light guide, The reflector has a first reflection area located on the opposite side of the first inner lens from the second diffusion area, and a second reflection area located on the second diffusion area side, The front end of the first reflective area protrudes toward the first inner lens further than the front end of the second reflective area.

[0007] According to this configuration, the first inner lens can diffuse a sufficient amount of light to the second diffusion region, which is a region that does not face the light guide, and thus light can be emitted in a gradational pattern from the first diffusion region to the second diffusion region, thereby providing a vehicle lamp that can improve the appearance when turned on. Effect of the Invention

[0008] According to the present disclosure, a vehicle lamp that has improved appearance when lit can be provided. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing an overall configuration of a vehicle lamp according to an embodiment of the present invention; [Diagram 2] 1 is a schematic diagram showing a partial configuration of a vehicle lamp according to an embodiment of the present invention; [Diagram 3] 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] 3 is a partially enlarged front view of a light guide provided in the vehicle lamp of FIG. 2. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 3 is a cross-sectional view taken along line BB in FIG. [Figure 8] 5 is a cross-sectional view of the vehicle lamp taken along line CC in FIG. 4. [Figure 9] 3 is a partially enlarged view of a reflector included in the vehicle lamp of FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that, for the sake of convenience of explanation, the dimensions of each component shown in the drawings may differ from the actual dimensions of each component.

[0011] In addition, for convenience of explanation, in the description of this embodiment, the "left-right direction," "front-rear direction," and "up-down direction" will be mentioned as appropriate. These directions are relative directions set for the rear combination lamp 1 shown in Figs. 1 and 2. Here, the "up-down direction" is a direction that includes the "upward direction" and the "downward direction." The "front-rear direction" is a direction that includes the "forward direction" and the "rearward direction." The "left-right direction" is a direction that includes the "leftward direction" and the "rightward direction."

[0012] FIG. 1 is a schematic diagram showing the overall configuration of a rear combination lamp 1 according to this embodiment. As shown in FIG. 1, the rear combination lamp 1 is provided at the rear of a vehicle 100. The rear combination lamp 1 has a plurality of lamps that perform different functions. Specifically, the rear combination lamp 1 includes a tail lamp 10, a turn signal lamp 2, a stop lamp 3, and other lamps. Examples of the other lamps include clearance lamps, daytime running lamps, hazard lamps, position lamps, back lamps, and fog lamps. In the following, the tail lamp 10, which is a main part of this embodiment, will be described, and the other lamps will not be described. The rear combination lamp 1 may be mounted, for example, on a rear bumper VB at the rear of the vehicle 100. In the case of a hatchback vehicle, the rear combination lamp 1 may be mounted on an openable and closable back door.

[0013] Fig. 2 is a front view showing the overall configuration of a tail lamp 10 (an example of a vehicle lamp) according to this embodiment. As shown in Fig. 2, the tail lamp 10 is composed of left and right outer regions 11A, 11A and a central region 11B sandwiched between the outer regions 11A, 11A. The left and right outer regions 11A, 11A are formed so as to be longer in the up-down direction than the central region 11B.

[0014] Fig. 3 is a cross-sectional view taken along line AA showing a cut surface of the outer region 11A on the right side of Fig. 2. As shown in Fig. 3, the tail lamp 10 includes a lamp body 5 formed in a box shape with an open front surface, and an outer cover 6 welded to the front surface of the lamp body 5, as a housing of the rear combination lamp 1. The outer cover 6 is made of, for example, a red translucent resin member.

[0015] A tail lamp 10 is disposed in a lamp chamber 7 defined between the lamp body 5 and the outer cover 6. The tail lamp 10 is formed long in the horizontal direction. The rear combination lamp 1 is formed long in the vehicle width direction by lamp units 11 constituting the tail lamp 10, and is disposed occupying the entire vehicle body of the vehicle 100 from the left end to the right end. The lamp units 11 are configured symmetrically on the left and right sides.

[0016] As shown in FIG. 3, the lamp unit 11 includes a light guide 20, a light emitting element 30 (see FIG. 6), a reflector 40, a first inner lens 50, and a second inner lens 60.

[0017] FIG. 4 is a partially enlarged front view showing the right region of the light guide 20. FIG. 5 is a partially enlarged plan view of the light guide 20. As described above, the lamp unit 11 is configured symmetrically, and the left region (not shown) of the light guide 20 is configured symmetrically with the right region. As shown in FIG. 4 and FIG. 5, the light guide 20 is a rod-shaped optical member, and is formed by injection molding a transparent resin member such as acrylic or polycarbonate. The light guide 20 is arranged so that its longitudinal direction coincides with the left-right direction, which is the extension direction of the lamp chamber 7. The light guide 20 is arranged to extend from the right end to the left end of the lamp chamber 7. The light guide 20 includes side end regions 20A, 20A arranged on the left and right, respectively, and a central region 20B sandwiched between the side end regions 20A, 20A. In the left and right side end regions 20A, the light guide 20 is configured by integrally molding two light pipe portions 21 having a substantially cylindrical shape. In the central region 20B, the light guide 20 is configured by one light pipe portion 21 having a substantially cylindrical shape.

[0018] FIG. 6 is a partially enlarged view of the light guide. As shown in FIG. 6, the end faces 21a on both the left and right sides of the light guide 20 are configured as light entrance parts. The light emitting element 30 is arranged so that the light emitting direction faces the end face 21a, which is the light entrance part of the light guide 20. The light emitting element 30 is attached to the right end region in the lamp chamber 7 with its light exit surface facing the right end face 21a of the light guide 20 as described above. As described above, the light guide 20 is composed of two light pipe parts 21 in the side end regions 20A, 20A, so that one light emitting element 30 is mounted on each end face 21a of the two light pipe parts 21. Although not shown, another set of light emitting elements 30 is attached to the left end region in the lamp chamber 7 with its light exit surface facing the end face of the left side end region of the light guide 20. Each light emitting element 30 is, for example, a white LED light source.

[0019] Returning to FIG. 3, the front side along the longitudinal direction of the light guide 20 is configured as an exit surface 22a that emits light. Since the light guide 20 in the side end region 20A shown in FIG. 3 is configured with two light pipes 21, the exit surface 22a is formed of two curved surfaces that are curved so as to be convex toward the first inner lens 50 side. On the rear side of the light guide 20, a reflection surface 22b having a plurality of steps (not shown) that reflect the light traveling inside the light guide 20 toward the exit surface 22a is formed. The light emitted from each light emitting element 30 enters the light guide 20 from the right end surface and the left end surface of the light guide 20, and travels inside the light guide 20 while repeating total reflection. Then, the light that enters the reflection surface 22b is reflected toward the exit surface 22a by the steps, and is emitted forward from the exit surface 22a.

[0020] Fig. 7 is a cross-sectional view taken along line BB in Fig. 2. As shown in Figs. 3, 6 and 7, light guide 20 has flange portion 23 protruding upward from between emission surface 22a and reflection surface 22b. Flange portion 23 is formed so that its vertical cross section is trapezoidal, and extends along the longitudinal direction of light guide 20.

[0021] 5 and 7, the front surface of the flange portion 23 formed in the central region 20B of the light guide 20 is subjected to a roughening treatment such as embossing. That is, the front surface of the flange portion 23 in the central region 20B away from the light emitting element 30 is formed as a textured surface 23a (an example of a light diffusing surface). Note that the textured surface 23a is not formed in the side end regions 20A, 20A of the light guide 20 composed of two light pipes 21, and the textured surface 23a is formed only in the central region 20B of the light guide 20 composed of one light pipe 21.

[0022] The reflector 40 is formed long in the horizontal direction with approximately the same length as the light guide 20. The reflector 40 is configured so that the vertical cross section in the longitudinal direction is curved, and the light guide 20 is held in the central curved portion. The inner surface (front surface of the lamp) of the reflector 40 is a reflective surface 41 that reflects light, and is configured to guide the light emitted from the light guide 20 forward. The reflector 40 is made of a translucent resin material or a transparent resin material, and has a metal film on the reflective surface 41. The metal film can be formed by a vapor deposition process of a metal such as aluminum. The reflector 40 may be made of an opaque resin, and the inner surface of this opaque resin may directly constitute the reflective surface 41. The reflector 40 made of an opaque resin may be provided with a metal film that constitutes the reflective surface 41.

[0023] Light that enters the light guide 20 travels through the light guide 20 while repeatedly being diffusely reflected. Therefore, the light reflected by the reflecting surface 22b of the light guide 20 and emitted from the emitting surface 22a includes not only light emitted horizontally, but also light emitted upward or downward at an angle from the horizontal. Light emitted upward or downward at an angle of a certain degree or more from the horizontal reaches the reflector 40, where it is reflected by its inner reflecting surface 41 and irradiated forward as reflected light. In this way, the use of the reflector 40 increases the light utilization efficiency.

[0024] The first inner lens 50 is disposed in the lamp chamber 7 so that at least a portion of it covers the exit surface 22a of the light guide 20. The first inner lens 50 is formed in a horizontally elongated plate shape having a required vertical width dimension. The first inner lens 50 is made of, for example, a milky white or colorless resin material having optical transparency. The resin material constituting the first inner lens 50 contains a light diffusing material that diffuses light. This allows the first inner lens 50 to have the function of diffusing and emitting incident light. Examples of the light diffusing material include metal oxide particles, such as titanium dioxide particles.

[0025] As shown in FIG. 3, the first inner lens 50 includes a first diffusion region 51a and a second diffusion region 51b. The first diffusion region 51a is a lower region of the first inner lens 50 and covers the exit surface 22a of the light guide 20. The second diffusion region 51b is an upper region of the first inner lens 50, and is a region that is continuous with the first diffusion region 51a and extends upward from the light guide 20. That is, the second diffusion region 51b is a region that does not face the exit surface 22a of the light guide 20 in a front view of the lamp. The light emitted from the exit surface 22a of the light guide 20 and the light reflected by the reflecting surface 41 of the reflector 40 are incident on the entrance surface 52 of the first inner lens 50 and diffused by the light diffusing material while passing through the first diffusion region 51a and the second diffusion region 51b. Then, the light is emitted from approximately the entire area of ​​the exit surface 53.

[0026] The second inner lens 60 is disposed in the lamp chamber 7 so as to cover the exit surface 53 of the first inner lens 50. The second inner lens 60 is also formed in a horizontally elongated plate shape having a required vertical width dimension, similar to the first inner lens 50. The second inner lens 60 is formed, for example, from a colorless resin material having optical transparency. The exit surface 61 of the second inner lens 60 is formed as a textured surface, and has a function of diffusing and emitting light incident from the entrance surface 62. Note that, instead of forming the exit surface 61 as a rough textured surface, a configuration in which the second inner lens 60 contains or is coated with a light diffusing material that diffuses light, or a configuration in which any diffusion step such as a fisheye step, a triangular step, a cylindrical step, or a stippled step is formed may be adopted.

[0027] As described above, the outer cover 6 is made of a red light-transmitting member. Therefore, the white light emitted from the white light-emitting element 30, guided inside the light guide 20, and irradiated forward from the emission surface 22a passes through the first inner lens 50, the second inner lens 60, and the outer cover 6, is irradiated forward of the lamp, and is visually recognized as red light extending horizontally as a whole.

[0028] Next, a description will be given of a specific structure of the reflective surface 41 of the reflector 40. The reflective surface 41 of the reflector 40 has a first reflective area 43 arranged below the light guide 20 and a second reflective area 44 arranged above the light guide 20.

[0029] The first reflection region 43 is located on the first diffusion region 51a side of the first inner lens 50, i.e., the opposite side to the second diffusion region 51b side. The first reflection region 43 is a region that reflects light emitted downward from the exit surface 22a of the light guide 20 at an angle of at least a predetermined angle with respect to the horizontal direction. The second reflection region 44 is located on the second diffusion region 51b side of the first inner lens 50. The second reflection region 44 is a region that reflects light emitted upward from the exit surface 22a of the light guide 20 at an angle of at least a predetermined angle with respect to the horizontal direction.

[0030] 3, in the outer regions 11A, 11A of the lamp unit 11, a front end 43a of the first reflection region 43, which is a region below the reflector 40, protrudes forward from the emission surface 22a of the light guide 20, i.e., toward the first inner lens 50. Also, as shown in Fig. 7, in the central region 11B of the lamp unit 11, the front end 43a of the first reflection region 43 is located behind the emission surface 22a of the light guide 20, but is arranged so as to be in substantially the same position as the central portion of the light guide 20 in front of and behind the lamp, i.e., the region indicated by the imaginary line LC.

[0031] 3 and 7, the front end 44a of the second reflection region 44, which is the upper region of the reflector 40, is located behind the emission surface 22a of the light guide 20, that is, on the opposite side to the first inner lens 50, in both the outer regions 11A, 11A and the central region 11B of the lamp unit 11. In this example, the front end 44a is located behind the central portion (region indicated by the imaginary line LC) of the light guide 20 in the front-rear direction of the lamp. In this manner, the front end 43a of the first reflection region 43, which is the lower region of the reflector 40, is configured to protrude toward the first inner lens 50 more than the front end 44a of the second reflection region 44, which is the upper region of the reflector 40.

[0032] Next, the fixing structure of the light guide 20 will be described with reference to Figs. 4 to 6, 8 and 9. Fig. 8 is a cross-sectional view of the tail lamp 10 cut along line CC in Fig. 4. Fig. 9 is a partial enlarged view of the reflector 40. As shown in Figs. 4 to 6 and 8, the flange portion 23 of the light guide 20 is provided with a plurality of fixing portions 24 for fixing the light guide 20 to the reflector 40. Each fixing portion 24 is formed so as to protrude obliquely rearward from the flange portion 23. An opening 25 is formed in the fixing portion 24.

[0033] As shown in Fig. 9, the reflector 40 is provided with a plurality of cutouts 45. An opening 46 is provided in the center of each cutout 45, and a protrusion 47 is formed so as to protrude into the opening 46. As shown in Fig. 8, with the tip of each fixing portion 24 of the light guide 20 inserted into the opening 46 of each cutout 45 of the reflector 40, the protrusion 47 of the cutout 45 engages with the opening 25 of the fixing portion 24, thereby fixing the light guide 20 to the reflector 40.

[0034] 8, a shade 70 having a light-shielding function is provided so as to cover the notch 45 and the fixing portion 24 of the light guide 20 when the fixing portion 24 is inserted into the notch 45 of the reflector 40. The shade 70 is made of, for example, an opaque resin. This makes it possible to hide the notch 45 and the fixing portion 24 so that they are not visible from the outside, and to block light leaking from the fixing portion 24 integrally molded with the light guide 20. The outer surface of the shade 70 is formed as a reflective surface that reflects light, and may be configured to guide the light emitted from the light guide 20 forward, similar to the reflective surface 41 of the reflector 40.

[0035] A front end 71 of the shade 70 is disposed so as to be substantially at the same position as the center part of the light guide 20 (the region indicated by the imaginary line LC) in the front-rear direction of the lamp. Moreover, in the cross-sectional position of FIG. 8, the front end 43a of the first reflection region 43 protrudes forward from the emission surface 22a of the light guide 20. The front end 71 of the shade 70 may be located rearward from the center part of the light guide 20. That is, the front end 71 is preferably located at the same position as the center part of the light guide 20 or rearward from the center part in the front-rear direction of the lamp.

[0036] Although not shown in the drawings, a gate mark for injection molding is formed in the central region 20B where the textured surface 23a of the flange portion 23 is formed. The gate mark is preferably formed, for example, between one fixing portion 24 and another fixing portion 24 in the central portion in the longitudinal direction of the flange portion 23.

[0037] In the lamp unit 11 of the tail lamp 10 configured as described above, when the light emitting element 30 is turned on, the light incident from the end surface 21a, which is the light incident portion of the light guide 20, is reflected inside the light guide 20 and is emitted from the emission surface 22a of the light guide 20. The light emitted from the emission surface 22a is transmitted through the first inner lens 50 and the second inner lens 60, and further through the outer cover 6, and is emitted forward of the lamp. At this time, since the first diffusion region 51a of the first inner lens 50 is disposed in front of the emission surface 22a of the light guide 20, mainly parallel light is incident on the incidence surface 52 of the first diffusion region 51a as the light emitted from the emission surface 22a. In addition, the light reflected by the first reflection region 43 of the reflector 40, which is disposed below the light guide 20 and protrudes forward from the emission surface 22a of the light guide 20, also enters the incidence surface 52 of the first diffusion region 51a. Then, the light emitted from the exit surface 22a of the light guide 20 and the light reflected from the first reflection region 43 of the reflector 40 are diffused and transmitted through the first diffusion region 51a, and are emitted from the exit surface 53 of the first diffusion region 51a. This causes the first diffusion region 51a to emit bright light.

[0038] On the other hand, in the second diffusion region 51b, which is a region not facing the exit surface 22a of the light guide 20, the light emitted from the exit surface 22a of the light guide 20 and incident on the first diffusion region 51a advances to the second diffusion region 51b while repeating total reflection. Then, the light is diffused in the second diffusion region 51b and emitted forward from the exit surface 53 of the second diffusion region 51b. Therefore, the second diffusion region 51b emits light that gradually becomes darker as it moves away from the first diffusion region 51a. In this way, when the light emitting element 30 is turned on, the first inner lens 50 forms a gradation-like emission in which the illuminance gradually decreases from the lower side to the upper side. Then, the tail lamp 10 is turned on in red while the light transmitted by the second inner lens 60 and the outer cover 6 also maintains this gradation-like emission.

[0039] As described above, the tail lamp 10 according to the present embodiment includes a light emitting element 30 (an example of a light source), a long light guide 20 that guides the light emitted from the light emitting element 30, a reflector 40 that reflects a part of the light emitted from the light guide 20, and a first inner lens 50 that diffuses the light emitted from the light guide 20 and the light reflected by the reflector 40 and emits them in front of the lamp. The first inner lens 50 has a first diffusion region 51a that covers the emission surface 22a of the light guide 20, and a second diffusion region 51b that is continuous with the first diffusion region 51a and extends in a direction away from the light guide 20 (in this example, toward the upper side of the lamp). The reflector 40 has a first reflection region 43 located on the opposite side of the first inner lens 50 to the second diffusion region 51b side, and a second reflection region 44 located on the second diffusion region 51b side. The front end 43 a of the first reflective area 43 protrudes further toward the first inner lens 50 than the front end 44 a of the second reflective area 44 .

[0040] According to this configuration, the first diffusion region 51a is disposed so as to cover the exit surface 22a of the light guide 20, and the front end 43a of the first reflection region 43 of the reflector 40 protrudes toward the first inner lens 50 side more than the front end 44a of the second reflection region 44. Therefore, the light emitted from the exit surface 22a of the light guide 20 and the light reflected by the first reflection region 43 of the reflector 40 are incident on the first diffusion region 51a, and the first diffusion region 51a emits light brightly. In contrast, the front end 44a of the second reflection region 44 disposed near the boundary between the first diffusion region 51a and the second diffusion region 51b of the first inner lens 50 does not protrude toward the first inner lens 50 side more than the front end 43a of the first reflection region 43. This makes it possible to suppress the light emitted from the exit surface 22a of the light guide 20 toward the second diffusion region 51b from being unnecessarily blocked by the front end 44a of the second reflection region 44. Therefore, there is no sudden darkness at the boundary between the first diffusion region 51a and the second diffusion region 51b of the first inner lens 50, and when the tail lamp 10 is turned on, a gradational light emission that is less unnatural can be obtained, thereby improving the appearance.

[0041] Furthermore, the front end 43a of the first reflection region 43 may protrude toward the first inner lens 50 side beyond the exit surface 22a of the light guide 20. With this configuration, the light utilization efficiency of the first reflection region 43 is improved, so that the amount of light incident on the first diffusion region 51a of the first inner lens 50 can be increased. This allows the first diffusion region 51a to emit light even brighter.

[0042] Furthermore, the front end 44a of the second reflection region 44 may be located rearward of the center (region indicated by the imaginary line LC) of the light guide 20 in the front-rear direction of the lamp. With this configuration, the front end 44a of the second reflection region 44 provided on the second diffusion region 51b side does not protrude beyond the exit surface 22a of the light guide 20, so that the light emitted from the exit surface 22a of the light guide 20 enters the first inner lens 50 without being blocked by the second reflection region 44. Therefore, a more sufficient amount of light can be made to enter the first inner lens 50, particularly the second diffusion region 51b side, and the appearance of the tail lamp 10 when lit can be further improved.

[0043] Furthermore, a fixing portion 24 for fixing the light guide 20 to the reflector 40 may be provided in a partial region of the light guide 20, and the shade 70 may be provided to cover the fixing portion 24. The front end portion 71 of the shade 70 may be located at the same position as the center of the light guide 20 in the front-rear direction of the lamp, or further rearward than the center portion. With this configuration, the fixing portion 24 of the light guide 20 can be prevented from being viewed from the outside of the lamp, and the shade 70 can prevent light guided to the fixing portion 24 from leaking out from the fixing portion 24, and the front end portion 71 of the shade 70 can be prevented from unnecessarily blocking light from the emission surface 22a of the light guide 20.

[0044] The tail lamp 10 further includes a second inner lens 60 arranged to cover the exit surface 53 of the first inner lens 50, and the exit surface 61 of the second inner lens 60 is formed as a light diffusing surface that diffuses the light exiting from the second inner lens 60. According to this configuration, the light diffusing surface of the second inner lens 60 can prevent the structure inside the second inner lens 60 from being visible from the outside of the rear combination lamp 1, which contributes to improving the design. Note that instead of or in addition to the exit surface 61, the entrance surface 62 of the second inner lens 60 may be formed as a light diffusing surface.

[0045] In addition, according to the tail lamp 10 of this embodiment, the light emitting element 30 is disposed on both end faces in the longitudinal direction of the long light guide 20 formed long in the horizontal direction, and the flange portion 23 protruding along the longitudinal direction is provided in the region other than the emission surface 22a of the light guide 20. The surface continuous with the emission surface 22a of the flange portion 23 disposed in the central region 20B (an example of a first region) which is a region away from the light emitting element 30 in the longitudinal direction of the light guide 20 is formed as a textured surface 23a that has been textured. According to this configuration, since the light emitting element 30 is disposed on both end faces of the long light guide 20, the amount of light emitted from the emission surface 22a in the region away from the light emitting element 30 is reduced, but the textured surface 23a is formed on the flange portion 23 provided in the central region 20B away from the light emitting element 30. Therefore, a sufficient amount of light can be emitted from the central region 20B away from the light emitting element 30, and the appearance of the tail lamp 10 when turned on can be improved. It should be noted that it is sufficient that the flange portion 23 in the central region 20B is formed with a light diffusion surface that diffuses the light emitted from the flange portion 23. Instead of forming the embossed surface 23a by roughening treatment, a configuration may be adopted in which any diffusion step such as a fish-eye step, a triangular step, a cylindrical step, or a stippled mark is formed on the light diffusion surface.

[0046] The first inner lens 50 is made of a material containing a light diffusing material that diffuses the light emitted from the light guide 20. The first diffusion region 51a of the first inner lens 50 covers the emission surface 22a and the textured surface 23a of the light guide 20, and the second diffusion region 51b extends continuously with the first diffusion region 51a in the direction in which the flange portion 23 protrudes from the light guide 20. According to this configuration, the flange portion 23 on which the textured surface 23a is formed is provided in correspondence with the boundary portion between the first diffusion region 51a of the first inner lens 50 and the second diffusion region 51b. This allows sufficient light to be diffused from the first diffusion region 51a side to the second diffusion region 51b as well. Therefore, gradational light emission from the first diffusion region 51a to the second diffusion region 51b is possible, further improving the appearance.

[0047] The light guide 20 also has side end regions 20A, 20A (an example of a second region) in which two light pipes 21 are arranged in parallel, and a central region 20B that is continuous with one end of the side end regions 20A, 20A and has one light pipe 21. A light emitting element 30 is disposed at each end of the two light pipes 21 on the other end side of the side end regions 20A, 20A, and a textured surface 23a that is a light diffusing surface is formed on the flange portion 23 of the one light pipe portion 21 in the central region 20B. According to this configuration, since the textured surface 23a is formed on the flange portion 23 of the central region 20B, which has fewer light pipes than the side end regions 20A, 20A, a sufficient amount of light can be secured not only in the outer regions 11A, 11A of the lamp unit 11 but also in the central region 11B.

[0048] Furthermore, the light guide 20 is made of a light-transmitting resin member, and a gate mark is formed in a part of the central region 20B where the textured surface 23a of the flange portion 23 is formed. That is, a gate can be provided in the central region 20B of the flange portion 23. This allows gates to be provided in an appropriate arrangement and in an appropriate number in, for example, the elongated central region 20B of the flange portion 23, so that the resin member can be injected evenly and the occurrence of molding defects can be suppressed.

[0049] Furthermore, the multiple fixing portions 24 for fixing the light guide 20 to the reflector 40 are provided so as to protrude from the flange portion 23. With this configuration, the light guide 20 can be fixed to the reflector 40 with a simple configuration. In particular, for the fixing portions 24 formed so as to protrude from the flange portion 23 in the central region 20B, the flange portion 23 is provided with the textured surface 23a, so that it is possible to suppress the light pooling phenomenon in which the light guided to the fixing portions 24 appears excessively brighter than other portions.

[0050] 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.

[0051] In the above embodiment, two light pipes 21 are provided in parallel in the side end regions 20A, 20A of the light guide 20, and one light pipe 21 is provided in the central region 20B, but the number of light pipes 21 is not limited to this example. It is sufficient that the number of light pipes 21 in the central region 20B is less than the number of light pipes 21 in the side end regions 20A, 20A, and for example, a configuration may be adopted in which three light pipes 21 are provided in parallel in the side end regions 20A, 20A, and two or one light pipe 21 is provided in the central region 20B.

[0052] In the above embodiment, the lamp unit 11 of the tail lamp 10 is configured symmetrically, but is not limited to this example. For example, the light emitting element 30 may be provided at an end of only one of the left and right side end regions 20A, 20A of the light guide 20, and the emitted light from the light emitting element 30 may be incident on the light guide 20 only from this one end.

[0053] In the above embodiment, the light guide 20, the first inner lens 50, and the second inner lens 60 constituting the lamp unit 11 are elongated in the horizontal direction, but the longitudinal direction of these members constituting the lamp unit 11 is not limited to the horizontal direction. Also, the flange portion 23 of the light guide 20 is shaped to protrude above the emission surface 22a of the light guide 20, but the protruding direction is not limited to the upward direction.

[0054] In the above embodiment, the lamp unit 11 is a tail lamp, but the present invention is not limited to this. The technical concept of the present embodiment can also be applied to clearance lamps, daytime running lamps, turn lamps, stop lamps, and other lamps. [Explanation of symbols]

[0055] 1 Rear combination lamp 5 Lamp body 6 Outer cover 7 Lamp room 10. Tail lamp 11 Lamp unit 20 Light guide 20A side edge area 20B Central area 21 Light pipe section 22a,53,61 Output surface 22b,41 Reflective surface 23 Flange 23a Textured surface 24 Fixed part 30 Light emitting element 40 Reflector 43 First reflection area 43a,44a,71 Front end 44 Second reflective area 45 Cutout 50 First inner lens 51a First diffusion region 51b Second diffusion region 52,62 Incidence plane 60 Second inner lens 70 Shades 100 vehicles

Claims

1. A light source; an elongated light guide that guides the light emitted from the light source; a reflector that reflects a portion of the light emitted from the light guide; A first inner lens that diffuses the light emitted from the light guide and the light reflected by the reflector and emits the light in front of the lamp; A vehicle lamp comprising: The first inner lens has a first diffusion region covering the exit surface of the light guide and a second diffusion region extending continuously from the first diffusion region in a direction away from the light guide, The reflector has a first reflection area located on the opposite side of the first inner lens from the second diffusion area, and a second reflection area located on the second diffusion area side, A vehicle lamp, wherein a front end of the first reflective area protrudes toward the first inner lens further than a front end of the second reflective area.

2. The vehicle lamp according to claim 1 , wherein a front end of the first reflective region protrudes toward the first inner lens beyond the light exit surface of the light guide.

3. The vehicular lamp according to claim 1 , wherein the front end of the second reflective region is located rearward of a center portion of the light guide in a front-rear direction of the lamp.

4. a fixing portion for fixing the light guide to the reflector is provided in a partial region of the light guide, The light guide further includes a shade provided to cover the fixing portion when the light guide is fixed to the reflector, 3. The vehicular lamp according to claim 1, wherein a front end of the shade is located at the same position as a center portion of the light guide or rearward of the center portion in a front-rear direction of the lamp.

5. Further, a second inner lens is arranged to cover the exit surface of the first inner lens, 3. The vehicle lamp according to claim 1, wherein at least one of an exit surface and an entrance surface of the second inner lens is formed as a light diffusing surface that diffuses the light exiting from the second inner lens.

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