Vehicle lamp

Abstract

The present invention reduces harmful light transmitted through a lens boundary without causing an increase in component cost and a reduction in assembly workability.　This vehicle lamp (1) comprises: a first light-emitting body (411); a second light-emitting body (412) and a third light-emitting body (413); a projection lens (10) in which a first diffusion lens part (11) for projecting light emitted by the first light-emitting body (411) and a second diffusion lens part (12) for projecting light emitted by the second light-emitting body (412) and third light-emitting body (413) are integrally formed; and a first light-blocking member (311) that is disposed to partially face a boundary between the first diffusion lens part (11) and the second diffusion lens part (12), and that blocks light emitted by the first light-emitting body (411) and traveling toward the second diffusion lens part (12) and light emitted by the second light-emitting body (412) and third light-emitting body (413) and traveling toward the first diffusion lens part (11). The projection lens (10) includes a first recess (101) formed at the boundary between the first diffusion lens part (11) and the second diffusion lens part (12) and diffusing transmitted light.

Description

Vehicle lighting fixtures

[0001] The present application claims priority from Japanese Patent Application No. 2024-072226 filed on April 26, 2024, and Japanese Patent Application No. 2024-148277 filed on August 30, 2024. For designated states where incorporation by reference of documents is permitted, the contents of the above applications are incorporated by reference into this application and made a part of the disclosure of this application.

[0002] A known vehicle lamp includes a plurality of light sources, a plurality of reflectors, and a plurality of lens sections formed in a line on a projection lens, and the plurality of illumination units, each of which is made up of the light sources, the reflectors, and the lens sections, are arranged side by side (see, for example, Patent Documents 1 and 2). In the vehicle lamps described in Patent Documents 1 and 2, a wall-like or columnar light-blocking member is provided between adjacent illumination units to block light from reaching the other illumination units. The tip of this light-blocking member is provided opposite the boundary between adjacent lens sections (hereinafter referred to as the lens boundary).

[0003] JP 2024-18691 A JP 2024-21977 A

[0004] In the vehicle lamp described in Patent Document 1, the tip of the light blocking member is separated from the lens boundary, so light from the illumination unit passes through the lens boundary, which causes glare and light streaks to occur due to the light passing through the lens boundary converging.

[0005] In the vehicle lamp described in Patent Document 2, the tip of the light-blocking member and the lens boundary are close to each other, preventing light from the illumination unit from passing through the lens boundary. However, since high-precision positioning of the tip of the light-blocking member and the lens boundary is required, the light-blocking member must be made as a separate member from the reflector, and then the positioning work between the light-blocking member and the lens boundary must be performed. This increases parts costs and reduces the workability of assembling the projection lens and reflector.

[0006] In view of the above circumstances, an object of the present invention is to provide a vehicle lamp that reduces harmful light that passes through lens boundaries without increasing component costs or reducing assembly workability.

[0007] The vehicle lamp of the present invention comprises a projection lens integrally formed with a first light emitter, a second light emitter, a first lens portion that projects light emitted by the first light emitter, and a second lens portion that projects light emitted by the second light emitter, and a light-blocking member, a portion of which is arranged opposite the boundary between the first lens portion and the second lens portion, that blocks light emitted by the first light emitter and traveling toward the second lens portion and light emitted by the second light emitter and traveling toward the first lens portion, and the projection lens comprises a light diffusion control portion formed at the boundary between the first lens portion and the second lens portion that diffuses the light that passes through.

[0008] According to the present invention, it is possible to reduce harmful light passing through lens boundaries without increasing component costs or reducing assembly workability.

[0009] FIG. 1 is a perspective view showing a vehicle lamp according to one embodiment of the present invention. FIG. 2 is an exploded perspective view showing the vehicle lamp of FIG. 1. FIG. 3 is a partial cross-sectional plan view showing the projection lens and reflector of FIGS. 1 and 2. FIG. 4 is a perspective view showing the reflector of FIGS. 1 to 3 as viewed from below and in front of the vehicle. FIG. 5 is a rear view showing the projection lens of FIGS. 1 and 2. FIG. 6 is a perspective view showing the projection lens of FIG. 5 as viewed obliquely from the rear left side of the vehicle. FIG. 7 is a partial cross-sectional bottom view showing the projection lens and reflector of FIGS. 1 and 2. FIG. 8 is a partial cross-sectional plan view showing the projection lens and reflector of a vehicle lamp of a comparative example. FIG. 9 is a diagram showing an example of a low-beam light distribution pattern projected onto a virtual screen in front of the vehicle by the vehicle lamp of the comparative example. FIG. 10 is a diagram showing an example of a low-beam light distribution pattern projected onto a virtual screen in front of the vehicle by the vehicle lamp of FIG. 1 etc. Fig. 11 is a partial cross-sectional plan view showing a projection lens and a reflector of a vehicle lamp according to another embodiment of the present invention. Fig. 12 is a partial cross-sectional plan view showing a projection lens and a reflector of a vehicle lamp according to another embodiment of the present invention. Fig. 13 is a perspective view showing a vehicle lamp according to another embodiment of the present invention. Fig. 14 is an exploded perspective view showing the vehicle lamp of Fig. 13. Fig. 15 is a bottom cross-sectional view showing the interior of the vehicle lamp of Fig. 13 etc. Fig. 16 is a plan view showing the vehicle lamp of Fig. 13 etc. Fig. 17 is a cross-sectional view taken along XVII-XVII of Fig. 16. Fig. 18 is a cross-sectional view taken along XVIII-XVIII of Fig. 16. Fig. 19 is a cross-sectional view showing an enlarged portion of Fig. 18. Fig. 20 is a cross-sectional view taken along XX-XX of Fig. 16. Fig. 21 is a perspective view showing the interior of the vehicle lamp of Fig. 13 etc. Fig. 22 is a perspective view showing the first light-shielding wall, the second light-shielding wall, etc. of Fig. 14 etc. Fig. 23 is a cross-sectional view for explaining convection occurring inside the vehicle lamp of Fig. 13 etc. Fig. 24 is a cross-sectional view for explaining convection occurring inside the vehicle lamp of a comparative example Fig. 25 is a diagram showing the relationship between the first light-shielding wall of Fig. 14 etc. and the reflected light of the first reflector portion.

[0010] The present invention will be described below in accordance with preferred embodiments. Note that the present invention is not limited to the embodiments shown below and can be modified as appropriate without departing from the spirit of the present invention. In addition, in the embodiments shown below, some components are omitted from illustration and description, but for the details of the omitted technologies, publicly known or well-known technologies are applied as appropriate within the scope of the content described below.

[0011] FIG. 1 is a perspective view showing a vehicle lamp 1 according to one embodiment of the present invention. The vehicle lamp 1 shown in this figure is a low beam headlamp that irradiates a low beam light distribution pattern ahead of the vehicle. The vehicle lamp 1 is housed in a headlight housing (not shown) together with a high beam headlamp (not shown). Note that while a low beam headlamp will be described as one embodiment of the present invention, other vehicle lamps such as a high beam headlamp may also be used as one embodiment of the present invention.

[0012] As shown in Fig. 1, the vehicle lamp 1 includes a projection lens 10, a heat sink 20, and a reflector 30. The projection lens 10 is a molded resin product in which a condensing lens portion 14, a first diffusing lens portion 11, a second diffusing lens portion 12, and a third diffusing lens portion 13 are integrally formed. The condensing lens portion 14, the first diffusing lens portion 11, the second diffusing lens portion 12, and the third diffusing lens portion 13 are provided in this order from the inside in the vehicle width direction. The projection lens 10 is attached to the heat sink 20 and the reflector 30.

[0013] The heat sink 20 is a pressed aluminum product to which the projection lens 10, reflector 30, and light source unit 40 (see FIG. 2, etc.) are attached. The heat sink 20 includes bracket units 22, 23 and a heat sink plate 24. The bracket units 22, 23 are used to attach the vehicle lamp 1 to a headlight housing. The heat sink plate 24 functions as a heat sink that dissipates heat generated by the light source unit 40. The bracket units 22, 23 also function as a heat sink that dissipates heat generated by the light source unit 40.

[0014] The reflector 30 is a molded resin product in which a first reflector portion 31, a second reflector portion 32, a third reflector portion 33, a fourth reflector portion 34, and a fifth reflector portion 35 are integrally formed. The first reflector portion 31, together with a first light emitter 411 and a first diffusing lens portion 11 (described later), constitutes a first irradiation unit U1. The second reflector portion 32 and the third reflector portion 33, together with a second light emitter 412 and a third light emitter 413 and a second diffusing lens portion 12 (described later), constitute a second irradiation unit U2. The fourth reflector portion 34, together with a fourth light emitter 414 and a third diffusing lens portion 13 (described later), constitutes a third irradiation unit U3. The fifth reflector portion 35, together with a fifth light emitter 415 and a condensing lens portion 14 (described later), constitutes a fourth irradiation unit U4.

[0015] The first reflector portion 31, the second reflector portion 32, the third reflector portion 33, and the fifth reflector portion 35 are arranged in the following order from the inside in the vehicle width direction: the fifth reflector portion 35, the first reflector portion 31, the second reflector portion 32, and the third reflector portion 33. The second reflector portion 32 and the third reflector portion 33 are arranged symmetrically. The fourth reflector portion 34 is arranged in front of the second reflector portion 32 and the third reflector portion 33.

[0016] A pair of positioning protrusions 15, 16 are provided on the upper part of the projection lens 10. In contrast, a pair of positioning holes 36, 37 are provided on the upper part of the reflector 30. When viewed from the top-bottom direction, hole 36 is provided between the condensing lens part 14 and the fifth reflector part 35, and hole 37 is provided between the second diffusing lens part 12 and the second reflector part 32. Protrusion 15 is a protrusion that fits into hole 36 and is provided on a plate piece that protrudes from the upper part of the condensing lens part 14 toward the rear of the vehicle. Protrusion 16 is a protrusion that fits into hole 37 and is provided on a plate piece that protrudes from the upper part of the second diffusing lens part 12 toward the rear of the vehicle.

[0017] Fig. 2 is an exploded perspective view showing the vehicular lamp 1 of Fig. 1. As shown in this figure, the heat sink 20 has a base portion 21. The base portion 21 has a first base portion 21A which is a plate-shaped portion on the vehicle rear side of the base portion 21, and a second base portion 21B which is a plate-shaped portion on the vehicle front side of the base portion 21. A step portion is formed at the boundary between the first base portion 21A and the second base portion 21B.

[0018] The projection lens 10, the reflector 30, and the light source unit 40 are attached to the first base unit 21A. The light source unit 40 is attached to the upper surface of the first base unit 21A via thermal grease 50, and the reflector 30 is attached to the upper surface of the first base unit 21A with the flange portion 10B (see FIG. 5, etc.) of the projection lens 10 sandwiched between them.

[0019] The second base portion 21B is attached with the projection lens 10 and the reflector 30. The reflector 30 is attached to the upper surface of the second base portion 21B with the flange portion 10A of the projection lens 10 sandwiched between them.

[0020] The bracket portion 22 is provided on the end of the first base portion 21A on the right side of the vehicle, and the bracket portion 23 is provided on the end of the first base portion 21A on the left side of the vehicle. The heat sink 24 is provided on the end of the first base portion 21A on the rear side of the vehicle.

[0021] The light source unit 40 includes a first light emitter 411, a second light emitter 412, a third light emitter 413, a fourth light emitter 414, and a fifth light emitter 415, and a metal substrate 42. The first light emitter 411, the second light emitter 412, the third light emitter 413, the fourth light emitter 414, and the fifth light emitter 415 are mounted on the substrate 42. The first light emitter 411, the second light emitter 412, the third light emitter 413, the fourth light emitter 414, and the fifth light emitter 415 are light-emitting diodes (LEDs) or the like, and emit light toward the upper part of the vehicle. The substrate 42 is attached to the upper surface of the first base unit 21A.

[0022] In the reflector 30, the first reflector portion 31 has a reflective surface provided to cover the first light emitter 411, and the reflective surface reflects light emitted by the first light emitter 411 toward the front of the vehicle. The second reflector portion 32 has a reflective surface provided to cover the second light emitter 412, and the reflective surface reflects light emitted by the second light emitter 412 toward the front of the vehicle. The third reflector portion 33 has a reflective surface provided to cover the third light emitter 413, and the reflective surface reflects light emitted by the third light emitter 413 toward the front of the vehicle. The fourth reflector portion 34 has a reflective surface provided to cover the fourth light emitter 414, and the reflective surface reflects light emitted by the fourth light emitter 414 toward the front of the vehicle. Furthermore, the fifth reflector portion 35 has a reflective surface that is provided so as to cover the fifth light emitter 415, and the reflective surface reflects the light emitted by the fifth light emitter 415 toward the front of the vehicle.

[0023] The reflective surfaces of the first reflector portion 31, the second reflector portion 32, the third reflector portion 33, the fourth reflector portion 34, and the fifth reflector portion 35 are formed by aluminum deposition, high-reflection coating, etc. The reflective surfaces are formed in a three-dimensional free-form shape based on an ellipse or a combination of an ellipse and a parabola.

[0024] The reflector 30 includes a first light-shielding member 311, a second light-shielding member 312, and a third light-shielding member 313. The first light-shielding member 311 is a wall-like member that separates the space in front of the first reflector unit 31 and the second reflector unit 32 into left and right, and blocks light traveling from the first irradiation unit U1 side to the second irradiation unit U2 side and light traveling from the second irradiation unit U2 side to the first irradiation unit U1 side. The second light-shielding member 312 is a column-like member that separates the space behind the second diffusion lens unit 12 and the third diffusion lens unit 13, and blocks light traveling from the second irradiation unit U2 side to the third irradiation unit U3 side and light traveling from the third irradiation unit U3 side to the second irradiation unit U2 side. The third light-shielding member 313 is a wall-like member that separates the space in front of the first reflector unit 31 and the fifth reflector unit 35 into left and right, and blocks light traveling from the first irradiation unit U1 side to the fourth irradiation unit U4 side, and light traveling from the fourth irradiation unit U4 side to the first irradiation unit U1 side (see also Figures 3 and 4, etc.).

[0025] The projection lens 10 is disposed on the vehicle front side of the reflector 30 and is attached to the heat sink 20 while being sandwiched between the reflector 30 and the heat sink 20. In the projection lens 10, the condensing lens unit 14 is disposed on the vehicle front side of the fifth reflector unit 35 and projects light reflected by the reflective surface of the fifth reflector unit 35 toward the vehicle front. The first diffusing lens unit 11 is disposed on the vehicle front side of the first reflector unit 31 and projects light reflected by the reflective surface of the first reflector unit 31 toward the vehicle front. The second diffusing lens unit 12 is disposed on the vehicle front side of the second reflector unit 32 and the third reflector unit 33 and projects light reflected by the reflective surfaces of the second reflector unit 32 and the third reflector unit 33 toward the vehicle front. The third diffusing lens portion 13 is disposed on the front right side of the vehicle from the fourth reflector portion 34, and projects light reflected by the reflective surface of the fourth reflector portion 34 to the front right side of the vehicle.

[0026] A pair of positioning holes H1 (one of which is not shown) is formed in the heat sink 20, and a pair of positioning pins P1 (one of which is not shown) is formed in the reflector 30, and the positioning holes H1 and the positioning pins P1 are fitted together. This positions the reflector 30 relative to the first base portion 21A of the heat sink 20.

[0027] A positioning hole H2 is formed in the flange portion 10A of the projection lens 10, and a positioning pin P2 is formed in the reflector 30, with the positioning hole H2 fitting into the positioning pin P2. Furthermore, the protrusion 15 fits into the hole 36, and the protrusion 16 fits into the hole 37. This positions the reflector 30 relative to the projection lens 10.

[0028] A pair of positioning holes H3 are formed in the first base portion 21A, and a pair of positioning pins (not shown) are formed on the back surface of the substrate 42, and the positioning holes H3 are fitted into the positioning pins, thereby positioning the substrate 42 with respect to the first base portion 21A.

[0029] Thermal grease 50 is interposed between the back surface of the substrate 42 and the upper surface of the first base portion 21A. The thermal grease 50 is provided directly below the first light emitter 411, directly below the second light emitter 412 and the third light emitter 413, directly below the fourth light emitter 414, and directly below the fifth light emitter 415.

[0030] 3 is a partial cross-sectional plan view showing the projection lens 10 and reflector 30 of FIG. 1 and FIG. 2. This figure shows a horizontal cross section of the condenser lens portion 14, the first diffusing lens portion 11, the second diffusing lens portion 12, and the third diffusing lens portion 13 of the projection lens 10, as well as the top surface of the reflector 30.

[0031] As shown in this figure, in the projection lens 10, the exit surfaces of the condenser lens portion 14, the first diffusing lens portion 11, and the second diffusing lens portion 12 are formed as continuous curved surfaces that extend in the vehicle width direction. In contrast, the exit surface of the third diffusing lens portion 13 extends diagonally rearward and to the right of the vehicle from the boundary with the exit surface of the second diffusing lens portion 12. As a result, the projection lens 10 as a whole has a slanted shape that extends rearward as it moves from the inside to the outside in the vehicle width direction.

[0032] The incident surface of the condensing lens unit 14 is a convex surface that bulges toward the fifth reflector unit 35, and the condensing lens unit 14 is a condensing lens (convex lens). The incident surface of the first diffusing lens unit 11 is a concave surface that recesses toward the exit surface, and the first diffusing lens unit 11 is a diffusing lens (concave lens). The incident surface of the second diffusing lens unit 12 is a concave surface that recesses toward the exit surface, and the second diffusing lens unit 12 is a diffusing lens (concave lens). The incident surface of the third diffusing lens unit 13 is a concave surface that recesses toward the exit surface, and the third diffusing lens unit 13 is a diffusing lens (concave lens).

[0033] A step 10S is formed at the boundary between the convex condenser lens portion 14 and the concave first diffusing lens portion 11. This step 10S faces the front end of the first light blocking member 311 with a gap between them (see FIG. 7).

[0034] The area of ​​the condensing lens unit 14 having a light distribution control function (hereinafter referred to as the light distribution control area) extends up to the step portion 10S, and the light distribution control area of ​​the first diffusing lens unit 11 also extends up to the step portion 10S. Therefore, light that travels from the fifth reflector unit 35 forward of the third light blocking member 313 passes through the light distribution control area of ​​the condensing lens unit 14 or the first diffusing lens unit 11. Furthermore, light that is reflected by the exit surface of the condensing lens unit 14 and then reflected at the front end of the third light blocking member 313 passes through the light distribution control area of ​​the condensing lens unit 14 or the first diffusing lens unit 11. Furthermore, light that travels from the first reflector unit 31 forward of the third light blocking member 313 passes through the light distribution control area of ​​the first diffusing lens unit 11 or the condensing lens unit 14. Furthermore, light reflected by the exit surface of first diffusing lens unit 11 and then reflected by the front end of third light blocking member 313 passes through the light distribution control area of ​​first diffusing lens unit 11 or condensing lens unit 14. Therefore, light traveling forward of third light blocking member 313 or reflected by the front end of third light blocking member 313 is unlikely to become harmful light that causes glare, light streaks, etc.

[0035] A first recess 101 is formed at the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12, both of which are concave lenses. The first recess 101 is a groove portion provided on the incident surface of the projection lens 10 and having a curved surface recessed toward the exit surface of the projection lens 10, and extends from the lower end to the upper end of the projection lens 10. The first recess 101 faces the front end of the first light blocking member 311 with a gap therebetween (see FIG. 7 ).

[0036] The light distribution control region of first diffusion lens portion 11 is formed between step portion 10S and first recess 101. The light distribution control region of second diffusion lens portion 12 is formed between first recess 101 and second recess 102, which will be described later.

[0037] Light traveling from the first reflector unit 31 to the front of the first light blocking member 311 passes through the first recess 101. Light traveling from the second reflector unit 32 and the third reflector unit 33 to the front of the first light blocking member 311 passes through the first recess 101. Light reflected by the exit surface of the first diffusing lens unit 11 and then reflected at the front end of the first light blocking member 311 passes through the first recess 101. Light reflected by the exit surface of the second diffusing lens unit 12 and then reflected at the front end of the first light blocking member 311 passes through the first recess 101. Here, because the first recess 101 has a light diffusion control function, light traveling to the front of the first light blocking member 311 or reflected at the front end of the first light blocking member 311 is prevented from becoming harmful light that causes glare, light streaks, and the like.

[0038] A second recess 102 is formed at the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13, both of which are concave lenses. The second recess 102 is a groove portion provided on the incident surface of the projection lens 10 and having a curved surface recessed toward the exit surface of the projection lens 10, and extends from the lower end to the upper end of the projection lens 10. The second recess 102 faces the front end of the second light blocking member 312 with a gap therebetween (see FIG. 7 ).

[0039] The light distribution control region of the second diffusion lens portion 12 is formed between the first recess 101 and the second recess 102. The light distribution control region of the third diffusion lens portion 13 is formed to extend from the second recess 102 to the rear right of the vehicle. To account for manufacturing tolerances of the first light blocking member 311, the second light blocking member 312, and the third light blocking member 313, the lower ends of the first light blocking member 311, the second light blocking member 312, and the third light blocking member 313 face the base portion 21 of the heat sink 20 via a gap. In contrast, the first recess 101 is positioned below the lower end of the first light blocking member 311 and includes a portion facing the gap between the lower end of the first light blocking member 311 and the base portion 21 of the heat sink 20. The second recess 102 is positioned below the lower end of the second light-shielding member 312 and includes a portion facing the gap between the lower end of the second light-shielding member 312 and the base portion 21 of the heat sink 20 .

[0040] Light traveling forward of the second light-blocking member 312 from the second reflector portion 32 and the third reflector portion 33 passes through the second recess 102. Light traveling forward of the second light-blocking member 312 from the fourth reflector portion 34 passes through the second recess 102. Light reflected by the exit surface of the second diffusion lens portion 12 and then reflected at the front end of the second light-blocking member 312 passes through the second recess 102. Light reflected by the exit surface of the third diffusion lens portion 13 and then reflected at the front end of the second light-blocking member 312 passes through the second recess 102. Here, because the second recess 102 has a light diffusion control function, light traveling forward of the second light-blocking member 312 or reflected at the front end of the second light-blocking member 312 is prevented from becoming harmful light that causes glare, light streaks, and the like.

[0041] 1 to 3 is a perspective view showing the reflector 30 as viewed from below and in front of the vehicle. As shown in this figure, in the reflector 30, a first light-shielding member 311, a second light-shielding member 312, and a third light-shielding member 313 extend from the lower surface of the reflector 30 toward the below side of the vehicle. The first light-shielding member 311 and the third light-shielding member 313 also extend in the front-to-rear direction of the vehicle.

[0042] Here, the side surfaces of the first light-shielding member 311, the second light-shielding member 312, and the third light-shielding member 313 are inclined as draft gradients. Therefore, the widths (front width dimensions) of the first light-shielding member 311, the second light-shielding member 312, and the third light-shielding member 313 gradually decrease from the upper side of the vehicle to the lower side of the vehicle. In other words, the front surfaces of the first light-shielding member 311, the second light-shielding member 312, and the third light-shielding member 313 have a tapered shape that is wider on the upper side of the vehicle and narrower on the lower side of the vehicle.

[0043] 1 and 2. As shown in this figure, the boundary between the first diffusing lens portion 11 and the second diffusing lens portion 12 on the incident surface of the projection lens 10 extends along the vertical direction of the vehicle. The first recess 101 is formed from the upper end to the lower end of the boundary between the first diffusing lens portion 11 and the second diffusing lens portion 12 on the incident surface of the projection lens 10, and diffuses light passing through the boundary.

[0044] The first recess 101 is a vertically elongated groove, and the left side of the first recess 101 is curved to bulge to the left, and the right side of the first recess 101 is curved to bulge to the right. That is, the first recess 101 has both left and right arc-shaped sides, and is formed in a shape such that the width gradually increases from the upper and lower ends toward the center in the vertical direction of the vehicle. In this embodiment, the longitudinal direction of the first recess 101 coincides with the vertical direction of the vehicle.

[0045] In contrast, the front end of the first light-blocking member 311 facing the first recess 101 has a tapered shape whose width decreases from the top end to the bottom end. Here, the narrower the width of the front end of the first light-blocking member 311, the more light passes through the boundary between the first diffusing lens unit 11 and the second diffusing lens unit 12. Therefore, the amount of light passing through the boundary between the first diffusing lens unit 11 and the second diffusing lens unit 12 increases from the top end to the bottom end of the boundary.

[0046] That is, at the boundary between the first diffusing lens unit 11 and the second diffusing lens unit 12, the amount of light passing through the boundary increases from the top end toward the center in the vertical direction of the vehicle, while the width of the first recess 101 that diffuses the light increases from the top end toward the center in the vertical direction of the vehicle. As a result, the amount of light passing through the boundary between the first diffusing lens unit 11 and the second diffusing lens unit 12 increases from the top end toward the center in the vertical direction of the vehicle, while the light diffusibility increases. Therefore, even if the front end of the first light-blocking member 311 is tapered, the first recess 101 can effectively diffuse the light passing through the boundary between the first diffusing lens unit 11 and the second diffusing lens unit 12.

[0047] The first recess 101 faces the front end of the first light-shielding member 311 and is a concave lens recessed toward the exit surface of the projection lens 10, which also has the effect of reducing the visibility of the first light-shielding member 311 when viewed through the projection lens 10.

[0048] Fig. 6 is a perspective view showing the projection lens 10 of Fig. 5 as viewed obliquely from the rear left side of the vehicle. As shown in this figure, the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 on the incident surface of the projection lens 10 extends in the vertical direction of the vehicle. The second recess 102 is formed from the upper end to the lower end of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 on the incident surface of the projection lens 10, and diffuses light passing through the boundary.

[0049] The second recess 102 is a vertically elongated groove, and the left side of the second recess 102 is curved to bulge to the left, and the right side of the second recess 102 is curved to bulge to the right. That is, the second recess 102 has both left and right arc-shaped sides, and is formed in a shape such that the width gradually increases from the upper and lower ends toward the center in the vertical direction. In this embodiment, the longitudinal direction of the second recess 102 coincides with the vertical direction of the vehicle.

[0050] In contrast, the front end of the second light-blocking member 312 facing the second recess 102 has a tapered shape whose width decreases from the top end to the bottom end. Here, the narrower the width of the front end of the second light-blocking member 312, the more light passes through the boundary between the second diffusing lens unit 12 and the third diffusing lens unit 13. Therefore, the amount of light passing through the boundary between the second diffusing lens unit 12 and the third diffusing lens unit 13 increases from the top end to the bottom end of the boundary.

[0051] That is, at the boundary between the second diffusing lens portion 12 and the third diffusing lens portion 13, the amount of light passing through the boundary increases from the upper end toward the center in the vertical direction of the vehicle, while the width of the second recess 102 that diffuses the light increases from the upper end toward the center in the vertical direction of the vehicle. As a result, the amount of light passing through the boundary between the second diffusing lens portion 12 and the third diffusing lens portion 13 increases from the upper end toward the center in the vertical direction of the vehicle, while the light diffusibility increases. Therefore, even if the front end of the second light-blocking member 312 is tapered, the light passing through the boundary between the second diffusing lens portion 12 and the third diffusing lens portion 13 can be effectively diffused by the second recess 102.

[0052] The second recess 102 faces the front end of the second light-shielding member 312 and is a concave lens recessed toward the exit surface of the projection lens 10, which also has the effect of reducing the visibility of the second light-shielding member 312 when viewed through the projection lens 10.

[0053] 7 is a partial cross-sectional bottom view showing the projection lens 10 and reflector 30 of FIG. 1 and FIG. 2. This figure shows a horizontal cross section of the condenser lens portion 14, the first diffusing lens portion 11, the second diffusing lens portion 12, and the third diffusing lens portion 13 of the projection lens 10, as well as the underside of the reflector 30.

[0054] As shown in this figure, the first diffusing lens unit 11, the second diffusing lens unit 12, and the third diffusing lens unit 13 are arranged side by side from the inside to the outside in the vehicle width direction. The first diffusing lens unit 11, the second diffusing lens unit 12, and the third diffusing lens unit 13 have different light diffusing properties. The third diffusing lens unit 13 has a higher light diffusing property than the second diffusing lens unit 12, and the second diffusing lens unit 12 has a higher light diffusing property than the first diffusing lens unit 11.

[0055] The lower the light diffusion property of the diffusion lens, the more distinct the difference between the diffused light that passes through the light distribution control area of ​​the diffusion lens and the light that passes through the periphery of the light distribution control area of ​​the diffusion lens, and the more harmful the light that passes through the periphery of the light distribution control area of ​​the diffusion lens becomes. In this embodiment, the first diffusion lens unit 11 is a diffusion lens with lower light diffusion property than the second diffusion lens unit 12. Therefore, the harmfulness of light that travels from the first irradiation unit U1 side forward of the first light blocking member 311 and passes through the boundary between the first diffusion lens unit 11 and the second diffusion lens unit 12 is higher than the harmfulness of light that travels from the second irradiation unit U2 side forward of the first light blocking member 311 and passes through the boundary between the first diffusion lens unit 11 and the second diffusion lens unit 12.

[0056] Furthermore, in this embodiment, the second diffusion lens section 12 is a diffusion lens having lower light diffusion properties than the third diffusion lens section 13. Therefore, the harmfulness of light that travels from the second irradiation unit U2 side toward the front of the second light blocking member 312 and passes through the boundary between the second diffusion lens section 12 and the third diffusion lens section 13 is higher than the harmfulness of light that travels from the third irradiation unit U3 side toward the front of the second light blocking member 312 and passes through the boundary between the second diffusion lens section 12 and the third diffusion lens section 13.

[0057] Therefore, in this embodiment, the first light-blocking member 311 is disposed between the first diffusing lens unit 11 and the second diffusing lens unit 12, closer to the first diffusing lens unit 11. In addition, the second light-blocking member 312 is disposed between the second diffusing lens unit 12 and the third diffusing lens unit 13, closer to the second diffusing lens unit 12.

[0058] Specifically, the center of the width direction of the front end of the first light-blocking member 311 is positioned closer to the first diffusing lens section 11 than the center of the width direction of the first recess 101. This makes it possible to block more light from traveling from the first irradiation unit U1 side to the boundary between the first diffusing lens section 11 and the second diffusing lens section 12 than to block light from the second irradiation unit U2 side to the boundary between the first diffusing lens section 11 and the second diffusing lens section 12. This makes it possible to reduce harmful light that has a relatively large impact and travels to the boundary between the first diffusing lens section 11 and the second diffusing lens section 12.

[0059] Furthermore, the center of the width direction of the front end of the second light-blocking member 312 is positioned closer to the second diffusion lens section 12 than the center of the width direction of the second recess 102. This makes it possible to block more light from traveling from the second irradiation unit U2 side to the boundary between the second diffusion lens section 12 and the third diffusion lens section 13 than to block light from the third irradiation unit U3 side to the boundary between the second diffusion lens section 12 and the third diffusion lens section 13. This makes it possible to reduce harmful light that has a relatively large impact and travels to the boundary between the second diffusion lens section 12 and the third diffusion lens section 13.

[0060] 8 is a partial cross-sectional plan view showing the projection lens 10' and reflector 30 of a vehicle lamp 1' of a comparative example. This figure shows a horizontal cross section of the condenser lens portion 14, the first diffusing lens portion 11, the second diffusing lens portion 12, and the third diffusing lens portion 13 of the projection lens 10', and the top surface of the reflector 30. Note that the same reference numerals are used to designate the same components as those in the above embodiment, and the description of the above embodiment is incorporated herein.

[0061] As shown in this figure, the first recess 101 is not provided at the boundary between the first diffusion lens unit 11 and the second diffusion lens unit 12 on the incident surface of the projection lens 10′. Therefore, light traveling from the first reflector unit 31 to the front of the first light-blocking member 311 is not diffused when passing through the boundary between the first diffusion lens unit 11 and the second diffusion lens unit 12. Furthermore, light traveling from the second reflector unit 32 and the third reflector unit 33 to the front of the first light-blocking member 311 is not diffused when passing through the boundary between the first diffusion lens unit 11 and the second diffusion lens unit 12. Furthermore, light reflected by the first diffusion lens unit 11 and then reflected at the front end of the first light-blocking member 311 is not diffused when passing through the boundary between the first diffusion lens unit 11 and the second diffusion lens unit 12. Furthermore, light reflected by the exit surface of second diffusing lens unit 12 and then reflected by the front end of first light-blocking member 311 is not diffused when passing through the boundary between first diffusing lens unit 11 and second diffusing lens unit 12. Here, because the boundary between first diffusing lens unit 11 and second diffusing lens unit 12 does not have a light diffusion control function, light that travels forward of first light-blocking member 311 or is reflected by the front end of first light-blocking member 311 is focused, becoming harmful light that causes glare, light streaks, and the like.

[0062] Furthermore, the second recess 102 is not provided at the boundary between the second diffusion lens unit 12 and the third diffusion lens unit 13 on the incident surface of the projection lens 10′. Therefore, light traveling forward from the second reflector unit 32 and the third reflector unit 33 to the second light-blocking member 312 is not diffused when passing through the boundary between the second diffusion lens unit 12 and the third diffusion lens unit 13. Furthermore, light traveling forward from the fourth reflector unit 34 to the second light-blocking member 312 is not diffused when passing through the boundary between the second diffusion lens unit 12 and the third diffusion lens unit 13. Furthermore, light reflected by the second diffusion lens unit 12 and then reflected at the front end of the second light-blocking member 312 is not diffused when passing through the boundary between the second diffusion lens unit 12 and the third diffusion lens unit 13. Furthermore, light reflected by the exit surface of the third diffusing lens unit 13 and then reflected by the front end of the second light-blocking member 312 is not diffused when passing through the boundary between the second diffusing lens unit 12 and the third diffusing lens unit 13. Here, the boundary between the second diffusing lens unit 12 and the third diffusing lens unit 13 does not have a light diffusion control function, so light that travels forward of the third light-blocking member 313 or that is reflected by the front end of the third light-blocking member 313 is focused, becoming harmful light that causes glare, light streaks, and the like.

[0063] 9 is a diagram showing an example of a low-beam light distribution pattern projected onto a virtual screen ahead of a vehicle by a vehicle lamp 1' of a comparative example. This figure shows an example of a low-beam light distribution pattern projected by a vehicle lamp 1' mounted on a vehicle traveling on the left side. In this figure, line V indicates the vertical line of the screen, and line H indicates the horizontal line of the screen. The intersection of line V and line H corresponds to the horizontal reference position. Furthermore, luminous intensity is shown as density. Note that the density increases as the luminous intensity increases.

[0064] It can be seen that light streaks have occurred in the area indicated by arrow A in Fig. 9. These light streaks have been generated by the convergence of light that has passed through the boundary between second diffusing lens section 12 and third diffusing lens section 13.

[0065] Fig. 10 is a diagram showing an example of a low beam light distribution pattern projected onto a virtual screen in front of the vehicle by the vehicle lamp 1 shown in Fig. 1 etc. This diagram shows an example of a low beam light distribution pattern projected by the vehicle lamp 1 mounted on a vehicle traveling on the left side. In this diagram, line V indicates the vertical line of the screen, and line H indicates the horizontal line of the screen. The intersection of line V and line H corresponds to the horizontal reference position. Furthermore, luminous intensity is shown as density. Note that the density increases as the luminous intensity increases.

[0066] As shown in Fig. 10, compared to the comparative example, the light diffusion is high around the area indicated by arrow A in Fig. 9, and there is no light streak equivalent to that in Fig. 9. This confirms that the light passing through the boundary between second diffusion lens section 12 and third diffusion lens section 13 is diffused by second recess 102, and therefore no light streak occurs.

[0067] As described above, in the vehicle lamp 1 according to this embodiment, the front end of the first light-blocking member 311 faces, with a gap between it and the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12. Therefore, light that travels forward of the first light-blocking member 311 or that is reflected by the front end of the first light-blocking member 311 passes through the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12.

[0068] In contrast, in the vehicle lamp 1 according to this embodiment, the projection lens 10 includes a first recess 101 formed at the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 to diffuse the light passing through. This prevents the light passing through the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 from becoming harmful light that causes glare, light streaks, and the like. Furthermore, because a gap through which light can pass can be tolerated between the first light-blocking member 311 and the projection lens 10, the required level of positioning accuracy between the front end of the first light-blocking member 311 and the projection lens 10 is lowered. This avoids increases in parts costs and decreases in assembly workability, such as when the first light-blocking member 311 is formed as a separate member from the reflector 30 and then a positioning operation is performed between the first light-blocking member 311 and the projection lens 10.

[0069] Furthermore, in the vehicle lamp 1 according to this embodiment, the front end of the second light-blocking member 312 faces, with a gap between it and the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13. Therefore, light that travels forward of the second light-blocking member 312 or that is reflected by the front end of the second light-blocking member 312 passes through the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13.

[0070] In contrast, in the vehicle lamp 1 according to this embodiment, the projection lens 10 includes a second recess 102 formed at the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 to diffuse the light passing through. This prevents the light passing through the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 from becoming harmful light that causes glare, light streaks, and the like. Furthermore, because a gap through which light can pass can be tolerated between the second light-blocking member 312 and the projection lens 10, the required level of positioning accuracy between the front end of the second light-blocking member 312 and the projection lens 10 is lowered. This avoids increases in parts costs and decreases in assembly workability, such as when the second light-blocking member 312 is formed as a separate member from the reflector 30 and then a positioning operation is performed between the second light-blocking member 312 and the projection lens 10.

[0071] Furthermore, in the vehicle lamp 1 according to this embodiment, the first recess 101 having a light diffusion control function formed at the boundary between the first diffusion lens section 11 and the second diffusion lens section 12 is a recess recessed on the exit surface side of the projection lens 10. This makes it possible to narrow the gap between the first light blocking member 311 and the projection lens 10, and reduce the amount of light passing through the boundary between the first diffusion lens section 11 and the second diffusion lens section 12, compared to when a convex section protruding toward the first light blocking member 311 is provided at the boundary between the first diffusion lens section 11 and the second diffusion lens section 12.

[0072] Furthermore, in the vehicle lamp 1 according to this embodiment, the second recess 102 having a light diffusion control function formed at the boundary between the second diffusion lens section 12 and the third diffusion lens section 13 is a recess recessed on the exit surface side of the projection lens 10. This makes it possible to narrow the gap between the second light blocking member 312 and the projection lens 10, and reduce the amount of light passing through the boundary between the second diffusion lens section 12 and the third diffusion lens section 13, compared to when a convex section protruding toward the second light blocking member 312 is provided at the boundary between the second diffusion lens section 12 and the third diffusion lens section 13.

[0073] Furthermore, in the vehicle lamp 1 according to this embodiment, the width of the first recess 101 gradually increases from both ends toward the center of the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12. This increases the light diffusibility at the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 from both ends toward the center. This increases the diffusibility of light passing through the center of the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12.

[0074] Furthermore, in the vehicle lamp 1 according to this embodiment, the width of the second recess 102 gradually increases from both ends toward the center of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13. This increases the light diffusibility of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 from both ends toward the center. Therefore, the diffusibility of light passing through the center of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 can be increased.

[0075] Furthermore, in the vehicle lamp 1 according to this embodiment, the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 is provided along the vehicle vertical direction, while the width of the first light-blocking member 311 gradually increases from the vehicle lower side to the vehicle upper side. This increases the light-blocking ability of the first light-blocking member 311 from the vehicle lower side to the vehicle upper side. Therefore, the light-blocking ability of the first light-blocking member 311 is increased against light that is reflected by the base portion 21 of the heat sink 20 and travels toward the upper end of the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12. This reduces harmful light for pedestrians.

[0076] Furthermore, in the vehicle lamp 1 according to this embodiment, the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 is provided along the vehicle vertical direction, while the width of the second light-blocking member 312 gradually increases from the vehicle lower side to the vehicle upper side. This increases the light-blocking ability of the second light-blocking member 312 from the vehicle lower side to the vehicle upper side. Therefore, the light-blocking ability of the second light-blocking member 312 is increased against light that is reflected by the base portion 21 of the heat sink 20 and travels toward the upper end of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13. This reduces harmful light for pedestrians.

[0077] Furthermore, in the vehicle lamp 1 according to this embodiment, the first diffusion lens portion 11 has lower light diffusion properties than the second diffusion lens portion 12. In contrast, the first light-blocking member 311 is disposed between the first diffusion lens portion 11 and the second diffusion lens portion 12, closer to the first diffusion lens portion 11. Therefore, harmful light that passes through the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 and has a relatively large impact can be suppressed.

[0078] Furthermore, in the vehicle lamp 1 according to this embodiment, the second diffusion lens portion 12 has lower light diffusion properties than the third diffusion lens portion 13. In contrast, the second light blocking member 312 is disposed between the second diffusion lens portion 12 and the third diffusion lens portion 13, closer to the second diffusion lens portion 12. Therefore, harmful light that passes through the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 and has a relatively large impact can be suppressed.

[0079] Furthermore, in the vehicular lamp 1 according to this embodiment, the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 is provided along the vehicle vertical direction, whereas the first recess 101, which functions as a light diffusion control portion, is formed from the top to the bottom of the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12. This allows the first recess 101 to exhibit its light diffusion function over the entire area from the top to the bottom of the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12. The first recess 101 also exhibits the effect of reducing the visibility of the first light blocking member 311 when viewed through the projection lens 10. Note that it is not essential that the first recess 101 be formed over the entire area from the top to the bottom of the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12. It is sufficient that the first recess 101 be formed from the bottom of the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 to at least the center in the vehicle vertical direction. Since the first recess 101 is formed from the lower end at the boundary between the first diffusing lens section 11 and the second diffusing lens section 12 to above the center of the vehicle in the vertical direction, the light diffusion function of the first recess 101 is exerted near the lower end of the relatively narrow first light-shielding member 311.

[0080] Furthermore, in the vehicular lamp 1 according to this embodiment, the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 is provided along the vehicle vertical direction, whereas the second recess 102, which functions as a light diffusion control portion, is formed from the top to the bottom of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13. This allows the second recess 102 to exhibit its light diffusion function over the entire area from the top to the bottom of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13. The second recess 102 also exhibits the effect of reducing the visibility of the second light blocking member 312 when viewed through the projection lens 10. Note that it is not essential that the second recess 102 be formed over the entire area from the top to the bottom of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13. It is sufficient that the second recess 102 be formed from the bottom of the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 to at least the center in the vehicle vertical direction. Since the second recess 102 is formed from the lower end at the boundary between the second diffusing lens section 12 and the third diffusing lens section 13 to above the center of the vehicle in the vertical direction, the light diffusion function of the second recess 102 is exerted near the lower end of the relatively narrow second light-shielding member 312.

[0081] The vehicle lamp 1 according to this embodiment includes a reflector 30 provided with a first light-blocking member 311 and a second light-blocking member 312, and a heat sink 20 to which the reflector 30 is attached. The first light-blocking member 311 and the second light-blocking member 312 extend from the reflector 30 toward the heat sink 20, and the first light-blocking member 311 and the second light-blocking member 312 face the base portion 21 of the heat sink 20 via a gap. The first recess 101 functioning as a light diffusion control unit includes a portion facing the gap between the first light-blocking member 311 and the base portion 21 of the heat sink 20. The second recess 102 functioning as a light diffusion control unit includes a portion facing the gap between the second light-blocking member 312 and the base portion 21 of the heat sink 20. This allows the first recess 101 to exhibit its light diffusion function for light passing through the gap between the first light-blocking member 311 and the base portion 21 of the heat sink 20. Furthermore, the second recess 102 exhibits a light diffusing function for light passing through the gap between the second light blocking member 312 and the base portion 21 of the heat sink 20 .

[0082] The vehicle lamp 1 according to this embodiment is also provided with a first light-blocking member 311 and a reflector 30, which is a frame for positioning the projection lens 10. The projection lens 10 has a positioning protrusion 16 that extends from above the second diffusion lens portion 12 toward the reflector 30, and the reflector 30 has a hole 37 with which the protrusion 16 engages, thereby positioning the second diffusion lens portion 12 relative to the reflector 30.

[0083] Here, the first light-shielding member 311 and the second light-shielding member 312 are arranged to sandwich the optical axis of the second diffusion lens unit 12. Therefore, by positioning the second diffusion lens unit 12 with respect to the reflector 30, it is possible to accurately position the boundary between the first diffusion lens unit 11 and the second diffusion lens unit 12 and the first light-shielding member 311, and the boundary between the second diffusion lens unit 12 and the third diffusion lens unit 13 and the second light-shielding member 312. It is not essential that the protrusion 16 extend from above the second diffusion lens unit 12 toward the reflector 30. The protrusion 16 may be provided to extend from below the second diffusion lens unit 12 toward the reflector 30, or the protrusion 16 may be provided to extend from above or below the first diffusion lens unit 11 toward the reflector 30.

[0084] Furthermore, in the vehicle lamp 1 according to this embodiment, a first recess 101 having light diffusing properties is provided at the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12, both of which have light diffusing properties. As a result, in addition to light being diffused by the first diffusion lens portion 11 and the second diffusion lens portion 12, light is also diffused by the first recess 101 located at the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12. Therefore, a diffused light distribution in which glare, light streaks, etc. are suppressed can be achieved.

[0085] Furthermore, in the vehicle lamp 1 according to this embodiment, a second recess 102 having light diffusing properties is provided at the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13, both of which have light diffusing properties. As a result, in addition to light being diffused by the second diffusion lens portion 12 and the third diffusion lens portion 13, light is also diffused by the second recess 102 located at the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13. Therefore, a diffused light distribution in which glare, light streaks, etc. are suppressed can be achieved.

[0086] 11 is a partial cross-sectional plan view showing a projection lens 110 and a reflector 30 of a vehicle lamp 100 according to another embodiment of the present invention. This figure shows a horizontal cross section of the condenser lens portion 14, the first diffusing lens portion 11, the second diffusing lens portion 12, and the third diffusing lens portion 13 of the projection lens 110, and the top surface of the reflector 30. Note that the same reference numerals are used to designate the same components as those in the above embodiment, and the description of the above embodiment is incorporated herein.

[0087] In the vehicle lamp 100 according to this embodiment, a first convex portion 111 is provided at the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 on the incident surface of the projection lens 110. In addition, a second convex portion 112 is provided at the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 on the incident surface of the projection lens 110.

[0088] The first convex portion 111 is a convex portion having a curved surface that bulges toward the second light-shielding member 312, and extends from the lower end to the upper end of the projection lens 110. The first convex portion 111 faces the front end of the second light-shielding member 312 with a gap therebetween.

[0089] Light traveling from the first reflector unit 31 to the front of the first light blocking member 311 passes through the first convex portion 111. Light traveling from the second reflector unit 32 and the third reflector unit 33 to the front of the first light blocking member 311 passes through the first convex portion 111. Light reflected by the exit surface of the first diffusing lens unit 11 and then reflected by the front end of the first light blocking member 311 passes through the first convex portion 111. Light reflected by the exit surface of the second diffusing lens unit 12 and then reflected by the front end of the first light blocking member 311 passes through the first convex portion 111. Here, since the first convex portion 111 has a light diffusion control function, light traveling to the front of the first light blocking member 311 or reflected by the front end of the first light blocking member 311 is diffused. Therefore, light traveling forward of the first light-shielding member 311 or reflected at the front end of the first light-shielding member 311 is prevented from converging and becoming harmful light that causes glare, light streaks, etc.

[0090] The second convex portion 112 is a convex portion having a curved surface that bulges toward the third light-shielding member 313, and extends from the lower end to the upper end of the projection lens 110. The second convex portion 112 faces the front end of the third light-shielding member 313 with a gap therebetween.

[0091] Light traveling forward of the second light-blocking member 312 from the second reflector unit 32 and the third reflector unit 33 passes through the second convex portion 112. Light traveling forward of the second light-blocking member 312 from the fourth reflector unit 34 passes through the second convex portion 112. Light reflected by the exit surface of the second diffusion lens unit 12 and then reflected at the front end of the second light-blocking member 312 passes through the second convex portion 112. Light reflected by the exit surface of the third diffusion lens unit 13 and then reflected at the front end of the second light-blocking member 312 passes through the second convex portion 112. Here, because the second convex portion 112 has a light diffusion control function, light traveling forward of the second light-blocking member 312 or reflected at the front end of the second light-blocking member 312 is diffused. Therefore, light traveling forward of the second light-shielding member 312 or reflected at the front end of the second light-shielding member 312 is prevented from converging and becoming harmful light that causes glare, light streaks, and the like.

[0092] 12 is a partial cross-sectional plan view showing a projection lens 1100 and a reflector 30 of a vehicle lamp 1000 according to another embodiment of the present invention. This figure shows a horizontal cross section of the condenser lens portion 14, the first diffusing lens portion 11, the second diffusing lens portion 12, and the third diffusing lens portion 13 of the projection lens 1100, and the top surface of the reflector 30. Note that the same reference numerals are used to designate the same components as those in the above embodiment, and the description of the above embodiment is incorporated herein.

[0093] In the vehicle lamp 1000 according to this embodiment, a first uneven portion 1101 is provided at the boundary between the first diffusion lens portion 11 and the second diffusion lens portion 12 on the incident surface of the projection lens 1100. In addition, a second uneven portion 1102 is provided at the boundary between the second diffusion lens portion 12 and the third diffusion lens portion 13 on the incident surface of the projection lens 1100.

[0094] The first uneven portion 1101 is an uneven portion (wave-shaped portion) in which multiple concave surfaces recessed toward the incident surface side are arranged in parallel, and extends from the lower end to the upper end of the projection lens 1100. The first uneven portion 1101 faces the front end of the second light-shielding member 312 with a gap therebetween.

[0095] Light traveling from the first reflector unit 31 to the front of the first light blocking member 311 passes through the first uneven portion 1101. Light traveling from the second reflector unit 32 and the third reflector unit 33 to the front of the first light blocking member 311 passes through the first uneven portion 1101. Light reflected by the exit surface of the first diffusing lens unit 11 and then reflected by the front end of the first light blocking member 311 passes through the first uneven portion 1101. Light reflected by the exit surface of the second diffusing lens unit 12 and then reflected by the front end of the first light blocking member 311 passes through the first uneven portion 1101. Here, since the first uneven portion 1101 has a light diffusion control function, light traveling to the front of the first light blocking member 311 or reflected by the front end of the first light blocking member 311 is diffused. Therefore, light traveling forward of the first light-shielding member 311 or reflected at the front end of the first light-shielding member 311 is prevented from converging and becoming harmful light that causes glare, light streaks, etc.

[0096] The second uneven portion 1102 is an uneven portion (wave-shaped portion) in which multiple concave surfaces recessed toward the incident surface side are arranged in parallel, and extends from the lower end to the upper end of the projection lens 1100. The second uneven portion 1102 faces the tip of the third light-shielding member 313 with a gap therebetween.

[0097] Light traveling forward of the second light-blocking member 312 from the second reflector unit 32 and the third reflector unit 33 passes through the second uneven portion 1102. Light traveling forward of the second light-blocking member 312 from the fourth reflector unit 34 passes through the second uneven portion 1102. Light reflected by the exit surface of the second diffusion lens unit 12 and then reflected at the front end of the second light-blocking member 312 passes through the second uneven portion 1102. Light reflected by the exit surface of the third diffusion lens unit 13 and then reflected at the front end of the second light-blocking member 312 passes through the second uneven portion 1102. Here, because the second uneven portion 1102 has a light diffusion control function, light traveling forward of the second light-blocking member 312 or reflected at the front end of the second light-blocking member 312 is diffused. Therefore, light traveling forward of the second light-shielding member 312 or reflected at the front end of the second light-shielding member 312 is prevented from converging and becoming harmful light that causes glare, light streaks, and the like.

[0098] The present invention has been described above based on the above-mentioned embodiments, but the present invention is not limited to the above-mentioned embodiments, and modifications may be made within the scope of the spirit of the present invention, and techniques from the embodiments or publicly known or well-known techniques may be combined.

[0099] For example, in the above embodiment, the optical system is composed of a reflector 30 and a projection lens 10, but instead of the reflector 30, a lens such as a primary lens may be provided so that light from the first light-emitting body 411, the second light-emitting body 412, the third light-emitting body 413, the fourth light-emitting body 414, and the fifth light-emitting body 415 passes through.

[0100] In addition, in the above embodiment, the first frame in which the first light-shielding member 311, the second light-shielding member 312, etc. are provided is referred to as the reflector 30, but this is not essential. For example, in a case where an optical system is provided in which a lens such as a primary lens is provided so that light from the first light emitter 411, the second light emitter 412, the third light emitter 413, etc. passes through, a frame that is a resin-molded frame body that does not function as a reflector may be referred to as the first frame. Furthermore, in the above embodiment, the present invention has been described using a headlight as an example, but the present invention is also applicable to other vehicle lamps such as a taillight.

[0101] A vehicle lamp according to another embodiment of the present invention will now be described.

[0102] [Background Technology for Vehicle Lamp According to the Present Embodiment] Vehicle lamps are known in which a substrate on which a light emitter is mounted and a reflector are attached to a heat sink, and a light-shielding wall protruding from the heat sink is disposed between the light emitter and a projection lens (see, for example, JP 2024-18691 A and JP 2018-190717 A). In the vehicle lamps described in these patent documents, the light-shielding wall blocks direct light traveling from the light emitter to the projection lens.

[0103] [Problem to be Solved by the Vehicle Lamp According to the Present Embodiment] In the vehicle lamp described in the above Patent Document, the light emitter, the light-shielding wall, and the reflector's reflective surface are arranged close to one another in a narrow space partitioned by the reflector's reflective surface and the substrate, which makes it easy for the light emitter to rise in temperature. In particular, because the light-shielding wall rises at a right angle from the heat sink, the distance between the light emitter and the light-shielding wall is short, making it even more easy for the light emitter to rise in temperature.

[0104] In view of the above circumstances, the vehicle lamp of this embodiment aims to suppress the temperature rise of the light emitter in a vehicle lamp in which the light emitter, the light-shielding portion, and the reflector's reflecting surface are arranged close to each other in a narrow space partitioned by the reflector's reflecting surface and the substrate.

[0105] The vehicle lamp of the first aspect comprises a light emitter, a substrate on which the light emitter is mounted, an attachment portion to which the substrate is attached, a reflector that reflects light emitted from the light emitter toward the front of the lamp, and a shading portion that is arranged forward of the lamp than the light emitter and protrudes from the attachment portion side toward the reflector side, and blocks light emitted from the light emitter toward the front of the lamp, and the shading portion rises from the attachment portion side toward the reflector so as to be inclined toward the front of the lamp, and has an inclined surface that blocks light emitted from the light emitter toward the front of the lamp.

[0106] The vehicle lamp according to the second aspect has the following features in addition to the features of the vehicle lamp according to the first aspect: The reflector is provided with a reflective surface that is disposed so as to extend from behind the light emitter to in front of the light blocking portion and that reflects light emitted from the light emitter toward the front of the lamp.

[0107] The vehicle lamp according to the third aspect has the following features in addition to the features of the vehicle lamp according to the second aspect: an area of ​​the reflective surface of the reflector that is rearward of the light emitter reflects light emitted from the light emitter diagonally downward and forward of the lamp, the light blocking portion has a top surface that is provided forward of the inclined surface, and the top surface is inclined downward as it approaches the front of the lamp.

[0108] The vehicular lamp according to the fourth aspect has the following features in addition to the features of the vehicular lamp according to the third aspect: The depression angle of the top surface is equal to or greater than the depression angle of light reflected diagonally downward and forward from the lamp in an area of ​​the reflective surface of the reflector that is rearward of the lamp relative to the light emitter.

[0109] The vehicle lamp according to the fifth aspect has the following features in addition to the features of the vehicle lamp according to the third or fourth aspect: the mounting portion and the light-blocking portion are provided on a pressed product in which the mounting portion and the light-blocking portion are integrally formed, and the top surface is an end surface of the pressed product.

[0110] The vehicle lamp according to the sixth aspect has the following features in addition to the features of the vehicle lamp according to the third or fourth aspect: The light-blocking portion has an R-shaped portion formed at the boundary between the inclined surface and the top surface.

[0111] The vehicle lamp according to the seventh aspect has the following features in addition to the features of the vehicle lamp according to the second aspect: the reflective surface of the reflector is inclined so that the angle with respect to the vertical gradually increases from the rear side of the light emitter to the front side of the light blocking portion, and the angle of the inclined surface with respect to the vertical is greater than the minimum angle of the reflective surface of the reflector with respect to the vertical.

[0112] The vehicle lamp according to the eighth aspect has the following features in addition to the features of the vehicle lamp according to the first or second aspect: A convection flow path is provided that guides convection from between the reflector and the substrate to the outside behind the lamp.

[0113] The vehicular lamp according to the ninth aspect has the following features in addition to the features of the vehicular lamp according to the first or second aspect: the mounting portion and the light-blocking portion are provided on a press-formed product in which the mounting portion and the light-blocking portion are integrally formed, a punched hole is formed in the mounting portion for molding the light-blocking portion, an insertion hole is formed in the substrate through which the light-blocking portion is inserted, and the punched hole has an outer shape that is one size larger than the outer shape of the insertion hole and that goes around the outer periphery of the insertion hole more outer than the periphery of the insertion hole.

[0114] A vehicle lamp according to a tenth aspect has the following features in addition to the features of the vehicle lamp according to the second aspect: it comprises a projection lens that irradiates, toward the front of the lamp, light reflected by the reflective surface of the reflector, the projection lens comprising a first light distribution control area that controls the light distribution of light emitted from a plurality of the light emitters and reflected toward the front of the vehicle by the reflective surface of the reflector, and a second light distribution control area that controls the light distribution of light emitted from a single light emitter and reflected toward the front of the vehicle by the reflective surface of the reflector, and a plurality of the light-blocking portions are arranged spaced apart from each other on the front side of the lamp of a plurality of the light emitters provided in correspondence with the first light distribution control area.

[0115] According to this embodiment, in a vehicle lamp in which the light emitter, the light blocking portion, and the reflector's reflective surface are arranged close to each other in a narrow space partitioned by the reflector's reflective surface and the substrate, the temperature rise of the light emitter can be suppressed.

[0116] FIG. 13 is a perspective view showing a vehicle lamp 1A according to another embodiment of the present invention. The vehicle lamp 1A shown in this figure is a low-beam headlamp that projects a low-beam light distribution pattern ahead of the vehicle. The vehicle lamp 1A is housed in a headlight housing (not shown) together with a high-beam headlamp (not shown). Note that while a low-beam headlamp will be described as an embodiment, other vehicle lamps, such as a high-beam headlamp or a side lamp, may also be used as embodiments. Furthermore, since a headlamp will be described as an embodiment, the vehicle's fore-and-aft direction and the fore-and-aft direction of the lamp coincide with each other. However, in the case of a side lamp, the vehicle width direction and the fore-and-aft direction of the lamp coincide with each other. Furthermore, in the case of a lamp that illuminates an intermediate position between the headlamp's illumination position and the side lamp's illumination position, the illumination direction and the fore-and-aft direction of the lamp coincide with each other. Furthermore, the same reference numerals are used for components similar to those in the above-described embodiment, and the description of the above-described embodiment is incorporated herein by reference.

[0117] As shown in Figure 13, the reflector 30 is a molded resin product in which a first reflector portion 31, a second reflector portion 32, a third reflector portion 33, a fourth reflector portion 34, and a fifth reflector portion 35, a connector accommodating portion 38, and a base portion 39 are integrally formed.

[0118] Fig. 14 is an exploded perspective view showing the vehicular lamp 1A of Fig. 13. As shown in this figure, the light source unit 40 includes a first light emitter 411, a second light emitter 412, a third light emitter 413, a fourth light emitter 414, and a fifth light emitter 415, a metal substrate 42, and a connector 43. The first light emitter 411, the second light emitter 412, the third light emitter 413, the fourth light emitter 414, and the fifth light emitter 415, and the connector 43 are mounted on the substrate 42.

[0119] A first light-shielding wall 211, a second light-shielding wall 212, a third light-shielding wall 213, a fourth light-shielding wall 214, and a fifth light-shielding wall 215 are provided on the first base portion 21A of the heat sink 20. The first light-shielding wall 211, the second light-shielding wall 212, the third light-shielding wall 213, the fourth light-shielding wall 214, and the fifth light-shielding wall 215 are vertically long plate pieces that rise up from the first base portion 21A toward the upper side of the vehicle. A first insertion hole 421, a second insertion hole 422, and a third insertion hole 423 are formed in the substrate 42.

[0120] The second light emitter 412 and the third light emitter 413 are arranged side by side in the vehicle width direction and in close proximity to each other. The second light emitter 412 and the third light emitter 413 are also arranged side by side with the second diffusion lens unit 12 in the vehicle front-rear direction. The first insertion hole 421 is an elongated hole extending in the vehicle width direction and is arranged on the vehicle front side of the second light emitter 412 and the third light emitter 413. The first insertion hole 421 is arranged in close proximity to the second light emitter 412 and the third light emitter 413. The first light-shielding wall 211 is arranged on the vehicle front side of the third light emitter 413 and in close proximity to the third light emitter 413, and the second light-shielding wall 212 is arranged on the vehicle front side of the second light emitter 412 and in close proximity to the second light emitter 412. The first light-shielding wall 211 and the second light-shielding wall 212 are inserted through the first insertion hole 421. The first light-shielding wall 211 blocks light emitted from the third light-emitting body 413 toward the front of the vehicle, and the second light-shielding wall 212 blocks light emitted from the second light-emitting body 412 toward the front of the vehicle.

[0121] The first light emitter 411 is arranged next to the first diffusion lens portion 11 in the front-to-rear direction of the vehicle. The second insertion hole 422 is arranged close to the first light emitter 411 on the vehicle front side of the first light emitter 411. The third light-shielding wall 213 is arranged close to the first light emitter 411 on the vehicle front side of the first light emitter 411. The third light-shielding wall 213 is inserted through the second insertion hole 422. The third light-shielding wall 213 blocks light emitted from the first light emitter 411 towards the vehicle front side.

[0122] The fourth light emitter 414 is arranged next to the third diffusion lens portion 13 in a direction inclined with respect to the front-to-rear direction of the vehicle. The fourth light-shielding wall 214 is arranged close to the fourth light emitter 414 on the front right side of the vehicle of the fourth light emitter 414. The fourth light-shielding wall 214 blocks light emitted from the fourth light emitter 414 to the front right side of the vehicle.

[0123] The fifth light emitter 415 is arranged next to the condenser lens unit 14 in the front-to-rear direction of the vehicle. The third insertion hole 423 is arranged close to the fifth light emitter 415 on the vehicle front side of the fifth light emitter 415. The fifth light shielding wall 215 is arranged close to the fifth light emitter 415 on the vehicle front side of the fifth light emitter 415. The fifth light shielding wall 215 is inserted through the third insertion hole 423. The fifth light shielding wall 215 blocks light emitted from the fifth light emitter 415 towards the vehicle front side.

[0124] A pair of positioning pins are formed on the reflector 30, and a pair of positioning holes are formed on the substrate 42, with the positioning pins fitting into the positioning holes (not shown). This positions the substrate 42 relative to the reflector 30. Note that the substrate 42 may be positioned relative to the first base portion 21A by forming a positioning pin on the first base portion 21A and then forming a positioning hole on the substrate 42, or by forming a positioning hole on the first base portion 21A and then forming a positioning pin on the substrate 42.

[0125] Fig. 15 is a bottom cross-sectional view showing the interior of the vehicle lamp 1A shown in Fig. 13 etc. This figure shows a horizontal cross section of the first diffusion lens portion 11, the second diffusion lens portion 12, the third diffusion lens portion 13, and the condenser lens portion 14 of the projection lens 10, as well as the inner surface of the reflector 30.

[0126] 15 , in the reflector 30, the reflective surface 33A of the third reflector unit 33 is provided so as to cover the third light emitter 413, and the reflective surface 33A reflects the light emitted from the third light emitter 413 toward the second diffusing lens unit 12. The reflective surface 32A of the second reflector unit 32 is provided so as to cover the second light emitter 412, and the reflective surface 32A reflects the light emitted from the second light emitter 412 toward the second diffusing lens unit 12. The reflective surface 31A of the first reflector unit 31 is provided so as to cover the first light emitter 411, and the reflective surface 31A reflects the light emitted from the first light emitter 411 toward the first diffusing lens unit 11. Furthermore, the reflective surface 34A of the fourth reflector unit 34 is provided so as to cover the fourth light emitter 414, and the reflective surface 34A reflects the light emitted by the fourth light emitter 414 toward the third diffusing lens unit 13. Furthermore, the reflective surface 35A of the fifth reflector unit 35 is provided so as to cover the fifth light emitter 415, and the reflective surface 35A reflects the light emitted by the fifth light emitter 415 toward the condensing lens unit 14.

[0127] The reflecting surface 31A of the first reflector portion 31, the reflecting surface 32A of the second reflector portion 32, the reflecting surface 33A of the third reflector portion 33, the reflecting surface 34A of the fourth reflector portion 34, and the reflecting surface 35A of the fifth reflector portion 35 are formed by aluminum deposition, high-reflection coating, etc. Furthermore, the reflecting surfaces 31A, 32A, 33A, 34A, and 35A are formed in a three-dimensional free-form surface shape based on an ellipse or a combination of an ellipse and a parabola.

[0128] The reflector 30 includes a first partition 31B, a column 31C, and a second partition 31D. The first partition 31B is a wall-like member that separates the space in front of the first reflector section 31 and the second reflector section 32 into left and right sections, and blocks light traveling from the first irradiation unit U1 side to the second irradiation unit U2 side and light traveling from the second irradiation unit U2 side to the first irradiation unit U1 side. The column 31C is a column-like member that separates the space in back of the second diffusion lens section 12 and the third diffusion lens section 13, and blocks light traveling from the second irradiation unit U2 side to the third irradiation unit U3 side and light traveling from the third irradiation unit U3 side to the second irradiation unit U2 side. The second partition 31D is a wall-like member that separates the space in front of the first reflector part 31 and the fifth reflector part 35 into left and right parts, and blocks light traveling from the first irradiation unit U1 side to the fourth irradiation unit U4 side, and light traveling from the fourth irradiation unit U4 side to the first irradiation unit U1 side.

[0129] The projection lens 10 is disposed on the vehicle front side of the reflector 30 and is attached to the heat sink 20 while being sandwiched between the reflector 30. In the projection lens 10, the second diffusing lens portion 12 is disposed in front of the second reflector portion 32 and the third reflector portion 33 and projects light reflected by the reflective surface 32A of the second reflector portion 32 and the reflective surface 33A of the third reflector portion 33 toward the front of the vehicle. The first diffusing lens portion 11 is disposed in front of the first reflector portion 31 and projects light reflected by the reflective surface 31A of the first reflector portion 31 toward the front of the vehicle. The third diffusing lens portion 13 is disposed in front of the fourth reflector portion 34 to the right and projects light reflected by the reflective surface 34A of the fourth reflector portion 34 toward the front right of the vehicle. The condenser lens portion 14 is disposed in front of the fifth reflector portion 35 and projects the light reflected by the reflecting surface 35A of the fifth reflector portion 35 in a direction ahead of the vehicle.

[0130] In the projection lens 10, the exit surfaces of the condenser lens portion 14, the first diffusing lens portion 11, and the second diffusing lens portion 12 are formed as continuous curved surfaces that extend in the vehicle width direction. In contrast, the exit surface of the third diffusing lens portion 13 extends diagonally rearward and to the right of the vehicle from the boundary with the exit surface of the second diffusing lens portion 12. As a result, the projection lens 10 as a whole has a slanted shape that extends rearward as it moves from the inside to the outside in the vehicle width direction.

[0131] The incident surface of the condensing lens unit 14 is a convex surface that bulges toward the fifth reflector unit 35, and the condensing lens unit 14 is a condensing lens (convex lens). The incident surface of the first diffusing lens unit 11 is a concave surface that recesses toward the exit surface, and the first diffusing lens unit 11 is a diffusing lens (concave lens). The incident surface of the second diffusing lens unit 12 is a concave surface that recesses toward the exit surface, and the second diffusing lens unit 12 is a diffusing lens (concave lens). The incident surface of the third diffusing lens unit 13 is a concave surface that recesses toward the exit surface, and the third diffusing lens unit 13 is a diffusing lens (concave lens).

[0132] A step portion 352 for forming a cutoff line is formed at the end portion on the vehicle rear side of the fifth reflector portion 35. Light emitted from the fifth light emitter 415 toward the vehicle rear side and reflected by the lower end of the reflecting surface 35A of the fifth reflector portion 35 is projected forward of the vehicle by the condensing lens portion 14, whereby a light distribution pattern with a cutoff line formed therein is irradiated forward of the vehicle.

[0133] Here, the projection lens 10 is formed with an area (hereinafter referred to as the light distribution control area) having a light distribution control function for the first diffusing lens unit 11, a light distribution control area for the second diffusing lens unit 12, a light distribution control area for the third diffusing lens unit 13, and a light distribution control area for the condensing lens unit 14. One light emitter (first light emitter 411, fourth light emitter 414, or fifth light emitter 415) is provided corresponding to each of the light distribution control areas of the first diffusing lens unit 11, the third diffusing lens unit 13, and the condensing lens unit 14. The first light emitter 411 is housed in a space partitioned by the first reflector unit 31, the substrate 42, and the first base unit 21A. The fourth light emitter 414 is housed in a space partitioned by the fourth reflector unit 34, the substrate 42, and the first base unit 21A. The fifth light emitter 415 is housed in a space defined by the fifth reflector portion 35, the substrate 42, and the first base portion 21A.

[0134] In contrast, two light emitters (second light emitter 412 and third light emitter 413) are provided corresponding to the light distribution control area of ​​second diffusion lens portion 12. Second light emitter 412 and third light emitter 413 are arranged adjacent to each other in the vehicle width direction and are housed in a space partitioned by second reflector portion 32, third reflector portion 33, substrate 42, and first base portion 21A. Therefore, the space housing second light emitter 412 and third light emitter 413 is more susceptible to temperature rise due to thermal energy of the light emitters than the spaces housing first light emitter 411, fourth light emitter 414, or fifth light emitter 415, respectively.

[0135] Fig. 16 is a plan view showing the vehicle lamp 1A shown in Fig. 13 etc. As shown in this figure, a connector housing portion 38 for housing a connector 43 is provided at the end portion on the vehicle rear side of the reflector 30. The second reflector portion 32 and the third reflector portion 33 are arranged near the connector housing portion 38.

[0136] Figure 17 is a cross-sectional view taken along line XVII-XVII of Figure 16. This figure shows a cross section cut along a vertical plane passing through the second light emitter 412. As shown in this figure, a substrate 42 on which the second light emitter 412 and other components are mounted is attached to the upper surface of the first base portion 21A, and the reflective surface 32A of the second reflector portion 32 is disposed so as to face the substrate 42 in the vertical direction of the vehicle. The end portion of the reflective surface 32A of the second reflector portion 32 on the rear side of the vehicle (hereinafter referred to as the rear end portion) is disposed further rearward of the second light emitter 412.

[0137] The reflecting surface 32A of the second reflector portion 32 is formed into a three-dimensional free-form surface shape that is curved so that its height from the substrate 42 gradually increases from the rear end to the end toward the front of the vehicle (hereinafter referred to as the front end), and the angle between the tangent to the reflecting surface 32A and the horizontal plane gradually decreases.

[0138] The second light-shielding wall 212 is a plate piece formed integrally with the first base portion 21A by bending, and protrudes from the first base portion 21A to the upper side of the substrate 42 through the first insertion hole 421. Here, the second light-shielding wall 212 is formed by bending at an obtuse angle, and protrudes obliquely upward from the first base portion 21A so as to be inclined toward the front of the vehicle. The inclined surface 212A rises from the upper surface of the first base portion 21A so as to be inclined toward the front of the vehicle.

[0139] Figure 18 is a cross-sectional view taken along line XVIII-XVIII of Figure 16. This figure shows a cross section cut along a vertical plane passing through the third light emitter 413. As shown in this figure, the reflective surface 33A of the third reflector portion 33 is disposed so as to face the substrate 42 in the vertical direction of the vehicle. The end portion of the reflective surface 33A of the third reflector portion 33 on the rear side of the vehicle (hereinafter referred to as the rear end portion) is disposed further rearward of the third light emitter 413.

[0140] The first light-shielding wall 211 is a plate piece formed integrally with the first base portion 21A by bending, and protrudes from the first base portion 21A to the upper side of the substrate 42 through the first insertion hole 421. Here, the first light-shielding wall 211 is formed by bending at an obtuse angle, and protrudes obliquely upward from the first base portion 21A so as to be inclined toward the front of the vehicle.

[0141] The first light-shielding wall 211 includes an inclined surface 211A, an end surface 211B, and an R-shaped portion 211C. The inclined surface 211A is a surface that rises from the upper surface of the first base portion 21A and slopes toward the front of the vehicle. The inclined surface 211A blocks light emitted from the third light emitter 413 toward the front of the vehicle. The end surface 211B is a surface formed at the tip of the first light-shielding wall 211. The R-shaped portion 211C is an R-shaped portion formed at the boundary between the inclined surface 211A and the end surface 211B. The inclined surface 211A, the end surface 211B, and the R-shaped portion 211C are subjected to treatments such as anodizing or painting to reduce reflectivity. Note that, depending on the material of the first light-shielding wall 211, it may be possible not to perform anodizing, but anodizing is more preferable.

[0142] A pin 391 that protrudes toward the substrate 42 is formed on the base portion 39 of the reflector 30. The pin 391 abuts against the upper surface of the substrate 42.

[0143] Fig. 19 is an enlarged cross-sectional view of a portion of Fig. 18. As shown in this figure, the angle α between the inclined surface 211A of the first light-shielding wall 211 and the horizontal plane is an acute angle (for example, 75 to 85°, more preferably 78 to 82°, and 80° in this embodiment). Also, the angle α' between the inclined surface 211A of the first light-shielding wall 211 and the vertical plane is an acute angle (for example, 5 to 15°, more preferably 8 to 12°, and 10° in this embodiment).

[0144] An end surface 211B of the first light-shielding wall 211 is inclined downward toward the front of the vehicle. The angle β between the end surface 211B and the horizontal plane is an acute angle (for example, 5 to 15 degrees, more preferably 8 to 12 degrees, and 10 degrees in this embodiment).

[0145] The angle θ between the tangent to the reflecting surface 33A of the third reflector part 33 and the vertical line gradually increases from the rear end to the front end of the reflecting surface 33A. The angle θ is smallest at the rear end of the reflecting surface 33A, and the minimum value of the angle θ is smaller than the angle α' between the inclined surface 211A of the first light-shielding wall 211 and the vertical line.

[0146] The second light-shielding wall 212 has the same configuration as the first light-shielding wall 211, and includes an inclined surface 212A similar to the inclined surface 211A, an end surface 212B similar to the end surface 211B, and an R-shaped portion 212C similar to the R-shaped portion 211C (see FIGS. 17, 21, and 22). The third light-shielding wall 213 and the fifth light-shielding wall 215 have the same configuration as the first light-shielding wall 211 and the second light-shielding wall 212, except for their different arrangements. The fourth light-shielding wall 214 has the same configuration as the first light-shielding wall 211 and the second light-shielding wall 212, except for their different arrangement and orientation.

[0147] 20 is a cross-sectional view taken along the line XX-XX in FIG. 16. This figure shows a cross section cut along a vertical plane passing through the first light-shielding wall 211. In the cross section shown in this figure, an opening is formed between the end of the reflector 30 on the vehicle rear side and the end of the heat sink 20 on the vehicle rear side, and a gap is formed from the opening to the first light-shielding wall 211 between the base portion 39 or the reflective surface 33A and the first base portion 21A or the substrate 42. As a result, convection occurs from the space partitioned by the reflective surface 33A and the substrate 42 to the rear of the vehicle lamp 1A, as will be described in detail later.

[0148] Fig. 21 is a perspective view showing the inside of the vehicle lamp 1A shown in Fig. 13 etc. This figure shows the inside of the second illumination unit U2 with a part of the third reflector portion 33 and the entire bracket portion 22 cut away.

[0149] 21 , the second light emitter 412 and the third light emitter 413 are disposed in a narrow space surrounded by the substrate 42 and the second and third reflector portions 32 and 33. The first light-shielding wall 211 protrudes through the first insertion hole 421 toward the vicinity of the third light emitter 413 on the substrate 42, and the second light-shielding wall 212 protrudes through the first insertion hole 421 toward the vicinity of the second light emitter 412 on the substrate 42. The first light-shielding wall 211 and the second light-shielding wall 212 are aligned in the vehicle width direction with a gap between them. Note that a single light-shielding wall may be provided for the second light emitter 412 and the third light emitter 413 aligned in the vehicle width direction.

[0150] 22 is a perspective view showing the first light-shielding wall 211 and the second light-shielding wall 212, etc., of FIG. 14 etc. In this figure, the illustration of the substrate 42 is omitted except for the first insertion holes 421 indicated by dashed lines. As shown in FIG. 22, rectangular openings 216 are formed in the first base portion 21A by punching around the first light-shielding wall 211 and the second light-shielding wall 212. The openings 216 are punched holes formed in the first base portion 21A to form the first light-shielding wall 211 and the second light-shielding wall 212.

[0151] Here, the first insertion hole 421 formed in the substrate 42 is located on the inner circumferential side of the opening 216 formed in the first base portion 21A when viewed in the vehicle vertical direction. The opening 216 has an outer shape that is slightly larger than the outer shape of the first insertion hole 421 and that circles around the outer circumferential side of the periphery of the first insertion hole 421.

[0152] Fig. 23 is a cross-sectional view for explaining convection currents that occur inside the vehicle lamp 1A of Fig. 13 etc. As shown in this figure, the first light-shielding wall 211 is inclined so as to gradually move away from the third light emitter 413 from the base end side to the tip end side, which makes it easier for convection currents to flow near the third light emitter 413. In addition, convection currents occur from the third light emitter 413 side through the left and right sides of the pin 391 to the rear of the vehicle lamp 1A.

[0153] Also, although not shown in the figure, the second light-shielding wall 212 is inclined so that it gradually moves away from the second light-emitting body 412 from the base end to the tip end, making it easier for convection currents to flow near the second light-emitting body 412.

[0154] That is, in the narrow space of the second irradiation unit U2 in which the third light emitter 413 and the second light emitter 412 and the first light-shielding wall 211 and the second light-shielding wall 212 are arranged close to each other, convection currents tend to flow near the third light emitter 413 and the second light emitter 412, and convection currents are generated that reach the rear of the vehicle lamp 1A. Therefore, it is possible to suppress a temperature rise in the narrow space in which the third light emitter 413 and the second light emitter 412 and the first light-shielding wall 211 and the second light-shielding wall 212 are arranged close to each other, and it is possible to suppress a temperature rise in the third light emitter 413 and the second light emitter 412.

[0155] In addition, the same effect as in the space of the second irradiation unit U2 occurs in the space of the first irradiation unit U1 in which the first light-emitting body 411 and the third light-shielding wall 213 are arranged, the space of the third irradiation unit U3 in which the fourth light-emitting body 414 and the fourth light-shielding wall 214 are arranged, and the space of the fourth irradiation unit U4 in which the fifth light-emitting body 415 and the fifth light-shielding wall 215 are arranged.

[0156] 24 is a cross-sectional view illustrating convection currents that occur inside a vehicle lamp of a comparative example. In the vehicle lamp of the comparative example shown in this figure, the first light-shielding wall 211′ is formed by bending at a right angle and protrudes at a right angle from the first base portion 21A toward the upper side of the vehicle.

[0157] 24 , because the first light-shielding wall 211′ protrudes at a right angle from the first base portion 21A, convection currents are less likely to flow near the third light emitter 413. That is, in a narrow space in which the third light emitter 413 and the second light emitter 412 are closely arranged with the first light-shielding wall 211′ and the second light-shielding wall 212′, convection currents are less likely to flow near the third light emitter 413 and the second light emitter 412. Therefore, a temperature rise is likely to occur in the narrow space in which the third light emitter 413 and the second light emitter 412 are closely arranged with the first light-shielding wall 211′ and the second light-shielding wall 212′, and the temperature of the third light emitter 413 and the second light emitter 412 is more likely to rise.

[0158] 25 is a diagram showing the relationship between the first light-shielding wall 211 of Fig. 14 etc. and the light reflected by the third reflector portion 33. As shown in this figure, the reflective surface 33A of the third reflector portion 33 is curved so as to extend forward of the vehicle while bulging upward from a point rearward and upward of the vehicle relative to the third light emitter 413, and reflects the light emitted by the third light emitter 413 diagonally downward toward the front of the vehicle.

[0159] The area of ​​the reflective surface 33A of the third reflector portion 33 that is located rearward of the vehicle relative to the third light emitter 413 (hereinafter referred to as the rearward area) reflects the light emitted from the third light emitter 413 rearward and upward of the vehicle diagonally downward toward the front of the vehicle.

[0160] 24, the end surface 211B of the first light-shielding wall 211' faces vertically upward. Therefore, light reflected diagonally downward and forward from the rear region of the reflecting surface 33A of the third reflector portion 33 is reflected by the end surface 211B of the first light-shielding wall 211', becoming harmful light that causes glare, light streaks, and the like.

[0161] In contrast, in this embodiment, the end surface 211B of the first light-shielding wall 211 is inclined downward toward the vehicle front. Therefore, light reflected diagonally downward toward the vehicle front by the rear region of the reflective surface 33A of the third reflector portion 33 is prevented from being reflected by the end surface 211B, thereby suppressing harmful light that causes glare, light streaks, etc. In particular, in this embodiment, the angle β between the end surface 211B and the horizontal plane is set to be equal to or greater than the angle γ between the light reflected by the rear region of the reflective surface 33A of the third reflector portion 33 and the horizontal plane, thereby improving the effect of suppressing harmful light that causes glare, light streaks, etc.

[0162] Although not shown, the end surface 212B of the second light-shielding wall 212 is inclined downward toward the vehicle front. This prevents light reflected diagonally downward toward the vehicle front by the rear region of the reflective surface 32A of the second reflector portion 32 from being reflected by the end surface 212B, thereby suppressing harmful light that causes glare, light streaks, etc. In particular, in this embodiment, the angle β between the end surface 212B and the horizontal plane is set to be equal to or greater than the angle γ between the light reflected diagonally downward toward the vehicle front by the rear region of the reflective surface 32A of the second reflector portion 32 and the horizontal plane, thereby improving the effect of suppressing harmful light that causes glare, light streaks, etc.

[0163] In addition, since the third light-shielding wall 213, the fourth light-shielding wall 214, and the fifth light-shielding wall 215 are configured in the same manner as the first light-shielding wall 211 and the second light-shielding wall 212, the first irradiation unit U1, the third irradiation unit U3, and the fourth irradiation unit U4 also have the same effect of suppressing harmful light that causes glare, light streaks, etc. as the second irradiation unit U2.

[0164] As described above, in the vehicle lamp 1A of this embodiment, the substrate 42 on which the third light emitter 413 and the second light emitter 412 are provided is attached to the first base portion 21A, and the reflective surfaces 33A, 32A of the reflector 30 reflect light emitted from the third light emitter 413 or the second light emitter 412 toward the front of the lamp. The light emitted from the third light emitter 413 toward the front of the vehicle is blocked by the first light-shielding wall 211, and the light emitted from the second light emitter 412 toward the front of the vehicle is blocked by the second light-shielding wall 212. This suppresses direct light emitted from the third light emitter 413 and the second light emitter 412 and reaching the projection lens 10 directly.

[0165] Here, the reflective surfaces 33A, 32A of the reflector 30 are provided so as to extend from a position rearward of the third light emitter 413 and the second light emitter 412 to a position forward of the first light-shielding wall 211 and the second light-shielding wall 212, and a narrow space is defined by the reflective surfaces 33A, 32A and the substrate 42, in which the third light emitter 413, the second light emitter 412, the first light-shielding wall 211, and the second light-shielding wall 212 are arranged close to each other. For this reason, a temperature rise is likely to occur in the space due to the thermal energy of the third light emitter 413 and the second light emitter 412.

[0166] In contrast, in the vehicle lamp 1A of this embodiment, the light-shielding surface of the first light-shielding wall 211 that blocks light emitted from the third light emitter 413 toward the front of the lamp is an inclined surface 211A that rises from the first base portion 21A side toward the reflector 30 so as to be inclined toward the front of the lamp. Also, the shielding surface of the second light-shielding wall 212 that blocks light emitted from the second light emitter 412 toward the front of the lamp is an inclined surface 212A that rises from the first base portion 21A side toward the reflector 30 so as to be inclined toward the front of the lamp. This facilitates convection near the third light emitter 413 and the second light emitter 412, thereby suppressing a temperature rise near the third light emitter 413 and the second light emitter 412 due to the thermal energy of the third light emitter 413 and the second light emitter 412 and the thermal energy of the light reflected by the reflecting surfaces 33A, 32A.

[0167] Furthermore, in the vehicular lamp 1A of this embodiment, the region (rear region) of the reflector 30's reflective surface 33A that is rearward of the third light emitter 413 reflects light emitted from the third light emitter 413 diagonally downward and forward of the lamp. Furthermore, the region (rear region) of the reflector 30's reflective surface 32A that is rearward of the second light emitter 412 reflects light emitted from the second light emitter 412 diagonally downward and forward of the lamp. Meanwhile, the top surface (end surface 211B) of the first light-shielding wall 211 that is located further forward of the inclined surface 211A of the first light-shielding wall 211 is inclined downward and forward of the lamp. Furthermore, the top surface (end surface 212B) of the second light-shielding wall 212 that is frontward of the inclined surface 212A of the second light-shielding wall 212 is inclined downward and forward of the lamp. This prevents light reflected diagonally downward and forward of the vehicle by the rear region of the reflecting surface 33A of the reflector 30 from being reflected by the end surface 211B of the first light-shielding wall 211, thereby suppressing harmful light that causes glare, light streaks, etc. Furthermore, light reflected diagonally downward and forward of the vehicle by the rear region of the reflecting surface 32A of the reflector 30 from being reflected by the end surface 212B of the second light-shielding wall 212, thereby suppressing harmful light that causes glare, light streaks, etc.

[0168] In particular, in the vehicular lamp 1A of this embodiment, the depression angle (angle β) of the end face 211B of the first light-shielding wall 211 is equal to or greater than the depression angle (angle γ) of light reflected diagonally downward and forward of the vehicle by the rear region of the reflective surface 33A of the reflector 30. This further prevents light reflected diagonally downward and forward of the vehicle by the rear region of the reflective surface 33A of the reflector 30 from being reflected by the end face 211B of the first light-shielding wall 211 and becoming harmful light that causes glare, light streaks, etc. Furthermore, the depression angle (angle β) of the end face 212B of the second light-shielding wall 212 is equal to or greater than the depression angle (angle γ) of light reflected diagonally downward and forward of the vehicle by the rear region of the reflective surface 32A of the reflector 30. This further prevents light reflected diagonally downward in front of the vehicle in the rear region of the reflective surface 32A of the reflector 30 from being reflected by the end surface 212B of the second shading wall 212 and becoming harmful light that causes glare, light streaks, etc.

[0169] Furthermore, in the vehicle lamp 1A of this embodiment, the first base portion 21A to which the substrate 42 is attached, the first light-shielding wall 211, and the second light-shielding wall 212 are provided on the heat sink 20, which is a press-formed product formed integrally with the first base portion 21A, and the top surface of the first light-shielding wall 211 is an end surface 211B of a metal plate, and the top surface of the second light-shielding wall 212 is an end surface 212B of a metal plate. The first light-shielding wall 211 is bent so that the end surface 211B is inclined downward toward the front side of the lamp, thereby preventing light reflected at the rear region of the reflective surface 33A of the reflector 30 from being reflected by the end surface 211B of the first light-shielding wall 211 and becoming harmful light that causes glare, light streaks, etc. In addition, the second light-shielding wall 212 is bent so that the end face 212B is inclined toward the front of the lamp and toward the lower side of the lamp, thereby preventing light reflected in the rear region of the reflective surface 32A of the reflector 30 from being reflected by the end face 212B of the second light-shielding wall 212 and becoming harmful light that causes glare, light streaks, etc.

[0170] Furthermore, in the vehicle lamp 1A of this embodiment, the first light-shielding wall 211 includes an R-shaped portion 211C formed at the boundary between the inclined surface 211A and the end surface 211B. This facilitates convection near the end surface 211B of the first light-shielding wall 211, thereby suppressing a temperature rise in the third light emitter 413. Furthermore, light reflected diagonally downward and forward from the rear region of the reflective surface 33A of the reflector 30 is prevented from being reflected by the end surface 211B of the first light-shielding wall 211 and becoming harmful light that causes glare, light streaks, etc. The R-shaped portion 211C may be an angular shape such as a C-face or any curved shape (e.g., an elliptical shape).

[0171] The second light-shielding wall 212 also has an R-shaped portion 212C formed at the boundary between the inclined surface 212A and the end surface 212B. This facilitates convection near the end surface 212B of the second light-shielding wall 212, thereby suppressing a temperature rise in the second light emitter 412. Furthermore, light reflected diagonally downward toward the front of the vehicle from the rear region of the reflective surface 32A of the reflector 30 is prevented from being reflected by the end surface 212B of the second light-shielding wall 212 and becoming harmful light that causes glare, light streaks, etc. The R-shaped portion 212C may be an angular shape such as a C-surface or any curved shape (e.g., an elliptical shape).

[0172] Furthermore, in the vehicle lamp 1A of this embodiment, the reflective surface 33A of the reflector 30 is inclined so that the angle with respect to the vertical gradually increases from a position rearward of the third light emitter 413 to a position forward of the first light-shielding wall 211. Here, the minimum value of the angle (angle θ) of the reflective surface 33A of the reflector 30 with respect to the vertical is smaller than the angle α' of the inclined surface 211A of the first light-shielding wall 211 with respect to the vertical. That is, the angle of the reflective surface 33A with respect to the vertical is minimum at the lower end of the reflective surface 33A of the reflector 30, so that the lower end is close to the third light emitter 413. On the other hand, the angle α' of the inclined surface 211A of the first light-shielding wall 211 with respect to the vertical is larger than the angle θ. Therefore, the space surrounding the third light emitter 413 can be made larger due to the space created by the angle α' being larger than the angle θ. This facilitates convection from the heat source, and reduces the effect of thermal energy on the third light emitter 413 between the reflecting surface 33A of the reflector 30 and the inclined surface 211A of the first light-shielding wall 211.

[0173] Furthermore, the reflective surface 32A of the reflector 30 is inclined so that the inclination angle with respect to the vertical gradually increases from the rear side of the second light emitter 412 to the front side of the lamp of the second light-shielding wall 212. Here, the minimum value of the angle (angle θ) of the reflective surface 32A of the reflector 30 with respect to the vertical is smaller than the angle α' of the inclined surface 212A of the second light-shielding wall 212 with respect to the vertical. That is, the angle of the reflective surface 32A with respect to the vertical is minimum at the lower end of the reflective surface 32A of the reflector 30, so that the lower end is close to the second light emitter 412. On the other hand, because the angle α' of the inclined surface 212A of the second light-shielding wall 212 with respect to the vertical is larger than the angle θ, a larger space can be secured to surround the second light emitter 412 due to the space created by the angle α' being larger than the angle θ. This facilitates convection from the heat source, and reduces the effect of thermal energy on the second light emitter 412 between the reflecting surface 32A of the reflector 30 and the inclined surface 212A of the second light-shielding wall 212.

[0174] Furthermore, in the vehicle lamp 1A of this embodiment, a convection flow path is formed that guides convection from between the reflector 30 and the substrate 42 to the outside behind the lamp, thereby suppressing a temperature rise in the vicinity of the third light emitter 413 and the second light emitter 412 due to the thermal energy of the third light emitter 413 and the second light emitter 412 and the thermal energy of the light reflected by the reflective surfaces 33A and 32A.

[0175] Furthermore, in the vehicle lamp 1A of this embodiment, the first base portion 21A to which the substrate 42 is attached, the first light-shielding wall 211, and the second light-shielding wall 212 are provided on the heat sink 20, which is a press-formed product formed integrally with the first base portion 21A. An opening 216, which is a punched hole for forming the first light-shielding wall 211 and the second light-shielding wall 212, is formed in the first base portion 21A, and a first insertion hole 421, through which the first light-shielding wall 211 and the second light-shielding wall 212 are inserted, is formed in the substrate 42.

[0176] Here, the opening 216 has an outer shape that is slightly larger than the outer shape of the first insertion hole 421 and that circles around the outer periphery of the first insertion hole 421. This causes convection to occur around the first light-shielding wall 211 and the second light-shielding wall 212 through the first insertion hole 421 and the opening 216, making it possible to suppress a temperature rise in the first light-shielding wall 211 and the second light-shielding wall 212.

[0177] The vehicle lamp 1A of this embodiment is also provided with a projection lens 10 that irradiates light reflected by the reflective surfaces 33A, 32A of the reflector 30 forward of the lamp. The projection lens 10 is provided with a second diffusing lens portion 12 that controls the light distribution of light emitted from the third light emitter 413 and the second light emitter 412 and reflected by the reflective surfaces 33A, 32A of the reflector 30, and a first diffusing lens portion 11, a third diffusing lens portion 13, and a condensing lens portion 14 that control the light distribution of light emitted from other light emitters and reflected by other reflective surfaces of the reflector 30.

[0178] That is, a plurality of light emitters (the third light emitter 413 and the second light emitter 412), a plurality of light-shielding walls (the first light-shielding wall 211 and the second light-shielding wall 212), and a plurality of reflecting surfaces 33A and 32A are provided corresponding to one of a plurality of light distribution control areas of the projection lens 10. Therefore, the third light emitter 413, the second light emitter 412, the first light-shielding wall 211, the second light-shielding wall 212, and the reflecting surfaces 33A and 32A have to be arranged close to each other, which makes it easy for the temperature of the third light emitter 413 and the second light emitter 412 to rise.

[0179] In contrast, the inclined surface 211A of the first light-shielding wall 211 and the inclined surface 212A of the second light-shielding wall 212 rise from the first base portion 21A side to the reflecting surfaces 33A, 32A side so as to be inclined toward the front of the lamp. As a result, by being provided corresponding to one light distribution control area of ​​the projection lens 10, it is possible to suppress the temperature rise of the third light emitter 413 and the second light emitter 412 which are arranged nearby.

[0180] In particular, since the first light-shielding wall 211 and the second light-shielding wall 212 are arranged at a distance from each other, a convection path that guides convection to the third light-emitting body 413 and the second light-emitting body 412 is formed between the first light-shielding wall 211 and the second light-shielding wall 212. This makes it possible to more effectively suppress the temperature rise of the third light-emitting body 413 and the second light-emitting body 412, which are arranged closely to each other.

[0181] The present invention has been described above based on the above-mentioned embodiments, but the present invention is not limited to the above-mentioned embodiments, and modifications may be made within the scope of the spirit of the present invention, and techniques from the embodiments or publicly known or well-known techniques may be combined.

[0182] For example, in the above embodiment, the heat sink 20 is formed by pressing, but the heat sink 20 may be formed by die casting. Also, the first light-shielding wall 211, the second light-shielding wall 212, the third light-shielding wall 213, the fourth light-shielding wall 214, and the fifth light-shielding wall 215 are formed by bending, but they may be formed by die casting.

[0183] DESCRIPTION OF SYMBOLS 1: Vehicle lamp 1A: Vehicle lamp 10: Projection lens 11: First diffusion lens portion (first lens portion, second light distribution control area) 12: Second diffusion lens portion (second lens portion, first lens portion, first light distribution control area) 13: Third diffusion lens portion (second lens portion, second light distribution control area) 14: Condenser lens portion (second light distribution control area) 16: Protrusion portion (positioning member) 20: Heat sink (second frame) 21A: First base portion (mounting portion) 30: Reflector (frame, first frame) 31A: Reflecting surface 32A: Reflecting surface 33A: Reflecting surface 34A: Reflecting surface 35A: Reflecting surface 37: Hole portion (engagement portion) 42: Substrate 100: Vehicle lamp 101 : First recess (light diffusion control section) 102 : Second recess (light diffusion control section) 110 : Projection lens 111 : First convex section (light diffusion control section) 112 : Second convex section (light diffusion control section) 211 : First light-shielding wall (light-shielding section) 211A : Inclined surface 211B : End surface (top surface) 211C : R-shaped section 212 : Second light-shielding wall (light-shielding section) 212A : Inclined surface 212B : End surface (top surface) 212C : R-shaped section 213 : Third light-shielding wall (light-shielding section) 214 : Fourth light-shielding wall (light-shielding section) 215 : Fifth light-shielding wall (light-shielding section) 216 : Opening (punched hole) 311 : First light-shielding member (light-shielding member) 312 : Second light-shielding member (light-shielding member) 313 : Third light-shielding member 411 : First light-emitting body (light-emitting body) 412 : Second light-emitting body (first light-emitting body, light-emitting body) 413 : Third light-emitting body (second light-emitting body, first light-emitting body, light-emitting body) 414 : Fourth light-emitting body (second light-emitting body, light-emitting body) 421 : First insertion hole (insertion hole) 422 : Second insertion hole (insertion hole) 423 : Third insertion hole (insertion hole) 1000 : Vehicle lamp 1100 : Projection lens 1101 : First uneven portion (light diffusion control portion) 1102 : Second uneven portion (light diffusion control portion) α' : Angle β : Angle (depression angle) γ : Angle (depression angle) θ : Angle

Claims

1. A vehicle lamp comprising: a first light emitter; a second light emitter; a projection lens integrally formed from a first lens portion that projects light emitted by the first light emitter and a second lens portion that projects light emitted by the second light emitter; and a light blocking member, a portion of which is arranged to face the boundary between the first lens portion and the second lens portion, for blocking light emitted by the first light emitter and traveling toward the second lens portion and light emitted by the second light emitter and traveling toward the first lens portion, wherein the projection lens is formed at the boundary between the first lens portion and the second lens portion and has a light diffusion control portion that diffuses the light that passes through.

2. The vehicle lamp according to claim 1, wherein the light diffusion control section is provided on the incident surface of the projection lens and is a recessed portion recessed toward the exit surface of the projection lens.

3. A vehicle lamp according to claim 1 or 2, wherein the width of the light diffusion control portion gradually increases from both longitudinal ends of the boundary between the first lens portion and the second lens portion toward the center.

4. A vehicle lamp according to claim 1 or 2, wherein the boundary between the first lens portion and the second lens portion is provided along the vertical direction of the vehicle, and the width of the light-blocking member gradually increases from the lower side of the vehicle to the upper side of the vehicle.

5. A vehicle lamp according to claim 1 or 2, wherein the first lens portion has lower light diffusion properties than the second lens portion, and the light blocking member is positioned between the first lens portion and the second lens portion, closer to the first lens portion.

6. A vehicle lamp according to claim 1 or 2, wherein the boundary between the first lens portion and the second lens portion is provided along the vertical direction of the vehicle, and the light diffusion control portion is formed from the lower end of the boundary between the first lens portion and the second lens portion to at least the center of the vehicle in the vertical direction.

7. A vehicle lamp according to claim 1 or 2, comprising: a first frame on which the light-blocking member is provided; and a second frame on which the first frame is attached; the light-blocking member extends from the first frame towards the second frame; the light-blocking member and the second frame face each other via a gap; and the light diffusion control unit includes a portion facing the gap between the light-blocking member and the second frame.

8. A vehicle lamp according to claim 1 or 2, comprising a frame on which the light-blocking member is provided and on which the projection lens is positioned, the projection lens comprising a positioning member extending from above or below one of the first lens portion and the second lens portion towards the frame, the frame comprising an engagement portion with which the positioning member engages, and one of the first lens portion and the second lens portion being positioned relative to the frame.

9. A vehicle lamp according to claim 1 or 2, wherein the first lens portion and the second lens portion are concave lenses having light diffusing properties.

10. A vehicle lamp as described in claim 1 or 2, wherein the first lens portion projects light emitted by the first light-emitting element in front of the vehicle, and the second lens portion projects light emitted by the second light-emitting element in front of the vehicle.

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