Vehicular lighting tool

Abstract

To provide a vehicular lighting tool that enables reduction of the number of components.SOLUTION: In a vehicular lighting tool, a first light source unit includes: one or more first light sources that emit light forming part of a low beam pattern forward; a first reflector that reflects light from the first light sources upward; a second reflector that reflects the light reflected by the first reflector forward; and a plurality of second light sources that are disposed on the upper side of the first light source and on the lower and rear side of the second reflector and that emit light forming an ADB pattern forward so as to pass through the lower side of the second reflector. A second light source unit includes: one or more third light sources that emit light forming part of the low beam pattern forward; and a light guide body having an incident part on which light from the third light source is incident, a light guide part that guides the light incident from the incident part upward and internally reflects the light forward and an emission part that emits the light guided by the light guide part forward. One of the second reflector and the light guide body includes a cut-off formation part that forms a cut-off line of the low beam pattern.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] BACKGROUND ART A configuration is known in which a light source unit that forms a low beam pattern and a light source unit that forms another pattern are arranged in one vehicle lamp (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-125662 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 discloses a configuration in which a light source unit that forms a low beam pattern has a shade disposed near the focal point of a projection lens and a reflector disposed behind the shade. However, this configuration increases the number of parts and the number of assembly steps. Therefore, a configuration that reduces the number of parts and assembly steps is desired.

[0005] The present invention has been made in view of the above, and has an object to provide a vehicle lamp that can reduce the number of parts and assembly steps. [Means for solving the problem]

[0006] A vehicle lamp according to the present invention includes a first light source unit that emits light forward, a second light source unit that is disposed integrally with the first light source unit on the left or right side of the first light source unit and emits light forward, and a projection lens that is formed from a single member and projects the light emitted forward from the first light source unit and the second light source unit, toward the front of the vehicle, wherein the first light source unit includes one or more first light sources that emit light forward to form a part of a low beam pattern, a first reflector that is disposed in front of the first light source and reflects light from the first light source upward, and a second reflector that is disposed above the first reflector and reflects light reflected by the first reflector forward, and and a plurality of second light sources arranged above the second reflector below and behind the second reflector, emitting light forming an ADB pattern forward so that the light passes below the second reflector; the second light source unit has one or more third light sources that emit light forming a part of a low beam pattern forward, and a light guide arranged in front of the third light sources and having an incident portion into which light from the third light sources is incident, a light guide portion that guides the light incident from the incident portion upward and internally reflects it forward, and an exit portion that emits the light guided by the light guide portion forward, and one of the second reflector and the light guide is provided with a cutoff forming portion that forms a cutoff line of the low beam pattern. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a vehicle lamp that can reduce the number of parts and the number of assembly steps. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an example of a vehicle lamp according to this embodiment. [Figure 2] FIG. 2 is a front view showing an example of a vehicle lamp according to this embodiment. [Figure 3] FIG. 3 is a diagram showing the configuration along the cross section AA in FIG. [Figure 4] FIG. 4 is a diagram showing the configuration along the cross section BB in FIG. [Figure 5] FIG. 5 is a diagram showing a configuration along the CC cross section in FIG. [Figure 6] FIG. 6 is a diagram showing the configuration along the cross section DD in FIG. [Figure 7] FIG. 7 is a perspective view showing an example of the first reflector and the second reflector. [Figure 8] FIG. 8 is a perspective view showing an example of a light guide. [Figure 9] FIG. 9 is a diagram showing an example of an irradiation pattern that is irradiated onto a virtual screen in front of a vehicle. [Figure 10] FIG. 10 is a diagram showing an example in which the irradiation patterns shown in FIG. 9 are superimposed. [Figure 11] FIG. 11 is a perspective view showing another example of the first reflector and the second reflector. [Figure 12] FIG. 12 is a perspective view showing another example of the light guide. [Figure 13] FIG. 13 is a diagram showing an example of an irradiation pattern that is irradiated onto a virtual screen in front of a vehicle. [Figure 14] FIG. 14 is a diagram showing an example in which the irradiation patterns shown in FIG. 13 are superimposed. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of a vehicle lamp according to the present invention will be described with reference to the drawings. However, the present invention is not limited to this embodiment. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially the same.

[0010] In the following description, the front-rear, up-down, left-right directions refer to directions when the automotive lamp is mounted on a vehicle and viewed from the driver's seat in the direction of vehicle travel. In this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is horizontal. In this embodiment, the front and rear directions refer to directions when the lamp is mounted on a vehicle (mounted on a vehicle). For example, when the lamp is mounted on the front of a vehicle, the front is the front direction (front side), and the rear is the rear direction (rear side).

[0011] Fig. 1 is a perspective view showing an example of a vehicle lamp according to this embodiment. Fig. 2 is a front view showing an example of a vehicle lamp according to this embodiment. Fig. 3 is a diagram showing a configuration along the AA cross section in Fig. 2. Fig. 4 is a diagram showing a configuration along the BB cross section in Fig. 2. Fig. 5 is a diagram showing a configuration along the CC cross section in Fig. 2. Fig. 6 is a diagram showing a configuration along the DD cross section in Fig. 2.

[0012] 1 to 6, the vehicle lamp 100 includes a first light source unit U1, a second light source unit U2, a projection lens 40, a support member 50, and a control unit 60. Although the control unit 60 is shown as a block in FIGS. 1 and 2, the control unit 60 may be, for example, an ECU (Electronic Control Unit) or the like.

[0013] The first light source unit U1 includes a first light source 11, a second light source 12, a first reflector 21, and a second reflector 22.

[0014] The first light source 11 emits light (shown by light ray L1 in FIG. 3) for forming, for example, part of a low beam pattern. In this embodiment, for example, three first light sources 11 are provided. Two or less or four or more first light sources 11 may be provided. When two or more first light sources 11 are provided, they can be arranged, for example, side by side in the left-right direction. The first light sources 11 are mounted on a mounting surface 14a of a substrate 14. The substrate 14 is supported by a support member 50. The light-emitting surface 11a of the first light source 11 faces forward.

[0015] FIG. 7 is a perspective view showing an example of the first reflector 21 and the second reflector 22. The first reflector 21 is disposed in front of the first light source 11. The first reflector 21 has a reflective surface 21a that reflects light from the first light source 11 upward. The first reflector 21 extends forward from the substrate 14 and has a shape that curves upward so as to be convex toward the front. The reflective surface 21a of the first reflector 21 is formed of a free-form surface based on, for example, an ellipse or a paraboloid. The first reflectors 21 are provided corresponding to the positions of the respective first light sources 11. In this embodiment, a total of three first reflectors 21 are provided, one in the center in the left-right direction and one on each side in the left-right direction. Note that the first reflectors 21 are not limited to being provided corresponding to the positions of the respective first light sources 11.

[0016] The second reflector 22 is disposed above the first reflector 21. The second reflector 22 has a reflecting surface 22a that reflects light reflected upward by the first reflector 21 forward. The second reflector 22 has, for example, a curved shape that is convex upward. The reflecting surface 22a of the second reflector 22 is formed of a free-form surface based on, for example, an ellipse, a paraboloid, or a plane. The curvature of the reflecting surface 22a of the second reflector 22 may be the same as or different from the curvature of the reflecting surface 21a of the first reflector 21.

[0017] The second light source 12 emits light for forming, for example, an ADB pattern. The second light source 12 is disposed above the first light source 11 and below and behind the second reflector 22. In this embodiment, for example, twelve second light sources 12 are provided. The number of second light sources 12 is not limited to twelve, and may be any number other than twelve as long as it is plural. The second light sources 12 can be disposed, for example, lined up in the left-right direction. The second light source 12 is mounted on the mounting surface 15a of the substrate 15. The light-emitting surface 12a of the second light source 12 faces forward. The second light source 12 emits light (indicated by light ray L2 in FIG. 3) for forming the ADB pattern forward so that the light passes below the second reflector 22.

[0018] The second light source unit U2 is disposed to the right of the first light source unit U1, i.e., on the vehicle outer side relative to the first light source unit U1. In other words, the first light source unit U1 is disposed on the vehicle inner side relative to the second light source unit U2. The second light source unit U2 is provided integrally with the first light source unit U1. The second light source unit U2 has a third light source 13 and a light guide 30.

[0019] The third light source 13 emits light (shown by light ray L3 in FIG. 4) for forming, for example, part of a low beam pattern. In this embodiment, for example, two third light sources 13 are provided. One or three or more third light sources 13 may be provided. When two or more third light sources 13 are provided, they can be arranged, for example, side by side in the left-right direction. The third light source 13 is mounted on the mounting surface 16a of the substrate 16. The substrate 16 is supported by a support member 50. The light-emitting surface 13a of the third light source 13 faces forward. The third light source 13 is arranged, for example, below the first light source 11.

[0020] The light guide 30 is disposed in front of the third light source 13. Fig. 8 is a perspective view showing an example of the light guide 30. The light guide 30 has an incident portion 31, a light guide portion 32, and an exit surface 33.

[0021] Light emitted from the third light source 13 is incident on the incident portion 31. An incident portion 31 is provided for each third light source 13. A plurality of incident portions 31 are arranged in the left-right direction to correspond to the third light sources 13. Each incident portion 31 has an opposing incident surface 31a, a lateral incident surface 31b, and a reflecting surface 31c.

[0022] The opposing incident surface 31a faces the light-emitting surface 13a of the third light source 13. Light emitted forward from the light-emitting surface 13a is incident on the opposing incident surface 31a. The opposing incident surface 31a is formed, for example, in a circular shape when viewed from behind. The opposing incident surface 31a may be formed in other shapes such as an oval or elliptical shape when viewed from behind. The opposing incident surface 31a is, for example, a convex surface that protrudes toward the third light source 13, but may also be a flat surface. The opposing incident surface 31a diffuses the incident light.

[0023] The side incident surface 31b is disposed along the outer periphery of the opposing incident surface 31a. The side incident surface 31b is formed in a cylindrical shape so as to surround the opposing incident surface 31a. Light emitted laterally from the light emitting surface 13a is incident on the side incident surface 31b. The side incident surface 31b may be formed so that its diameter decreases toward the front.

[0024] The reflecting surface 31c is disposed along the outer periphery of the side entrance surface 31b. The reflecting surface 31c internally reflects the light incident from the side entrance surface 31b forward so as to condense the light.

[0025] The light guide 32 guides the light incident from the incident section 31. The light guide 32 has a first reflecting surface 32a and a second reflecting surface 32b. The first reflecting surface 32a internally reflects the light incident from the incident section 31 and traveling forward, toward the upper side or diagonally upward toward the front. Note that the first reflecting surface 32a may be formed to internally reflect the light toward an edge section 34, which will be described later. A first reflecting surface 32a is provided for each third light source 13. The multiple first reflecting surfaces 32a are formed such that, in a cross-sectional view, one curved surface is divided into sawtooth shapes for each third light source 13. Note that the first reflecting surface 32a is not limited to the above configuration. For example, the multiple first reflecting surfaces 32a may be formed by a single curved surface.

[0026] Second reflecting surface 32b reflects forward the light reflected upward or obliquely upward by first reflecting surface 32a. Second reflecting surface 32b is, for example, planar. Second reflecting surface 32b is provided in a state of bending forward and upward from the upper end of light-guiding rear surface 32c of light-guiding unit 32. The shape of second reflecting surface 32b is not limited to a planar shape, and may be a curved surface or a combination of a flat surface and a curved surface.

[0027] Light guide rear surface 32c constitutes the rear surface of light guide 32. Light guide rear surface 32c is, for example, planar and is formed so as to slope forward as it extends upward. The shape of light guide rear surface 32c is not limited to a planar shape and may be a curved surface or a combination of a flat surface and a curved surface. An edge portion 34 is provided at the upper end of light guide rear surface 32c. Edge portion 34 is formed so as to extend in the left-right direction at the boundary between second reflecting surface 32b and light guide rear surface 32c.

[0028] A cutoff forming portion 35 is provided on the edge portion 34. The cutoff forming portion 35 is located in the center of the edge portion 34 in the left-right direction. The cutoff forming portion 35 forms a cutoff line CL in the low beam pattern by reflecting light that is reflected by the first reflecting surface 32a and reaches the edge portion 34 forward by the second reflecting surface 32b. The cutoff forming portion 35 has a first straight portion 35a, an inclined portion 35b, and a second straight portion 35c. The first straight portion 35a and the second straight portion 35c are portions for forming horizontal cutoff lines CLa and CLc (see FIG. 9, etc.) of the low beam pattern. The inclined portion 35b is a portion for forming an oblique cutoff line CLb (see FIG. 9, etc.) of the low beam pattern.

[0029] The projection lens 40 projects the light emitted forward from the first light source unit U1 and the second light source unit U2 toward the front of the vehicle. The projection lens 40 has a first lens portion 41 and a second lens portion .

[0030] The first lens portion 41 projects light from the first light source unit U1 forward of the vehicle to form part of the low beam pattern and the ADB pattern. The first lens portion 41 forms a diffusion pattern around a condensed light pattern, which will be described later, within the low beam pattern. The first lens portion 41 may form a diffusion pattern that partially overlaps the condensed light pattern. In this embodiment, the first lens portion 41 has an incident surface 41a and an exit surface 41b. Light from the first light source unit U1 is incident on the incident surface 41a. The exit surface 41b emits the light that has entered the incident surface 41a forward of the vehicle.

[0031] The second lens portion 42 projects light from the second light source unit U2 forward of the vehicle to form part of the low beam pattern. The second lens portion 42 forms a condensed light pattern that includes a cutoff line within the low beam pattern. The second lens portion 42 has an incident surface 42a and an exit surface 42b. Light from the second light source unit U2 is incident on the incident surface 42a. The exit surface 42b emits the light that has entered the incident surface 42a.

[0032] The projection lens 40 has a first lens portion 41 and a second lens portion 42 formed as a single member. The projection lens 40 is held by a lens holder (not shown). The lens holder is supported by a support member 50. The projection lens 40 has a shape that slopes upward from the inside of the vehicle to the outside of the vehicle, a so-called slant shape (see FIG. 2, etc.). Therefore, the second lens portion 42 is positioned higher than the first lens portion 41.

[0033] In this embodiment, the third light source 13 is disposed below the first light source 11. That is, the incident portion 31 of the light guide 30 is disposed below the reflecting surface 21a of the first reflector 21. In this way, when the second light source unit U2 having the light guide 30 is disposed on the vehicle outer side relative to the first light source unit U1, a layout that corresponds to the slant shape of the projection lens 40 can be achieved by disposing the light guide 30 that has a larger vertical dimension.

[0034] The support member 50 supports the substrates 14, 15, and 16. The support member 50 has a first base portion 51 that supports the substrates 14 and 15, and a second base portion 52 that supports the substrate 16. The first base portion 51 and the second base portion 52 are, for example, planar. The support member 50 dissipates heat generated by the first light source 11, the second light source 12, and the third light source 13. The support member 50 may be provided with a heat dissipation portion such as fins 54 on the rear portion. The support member 50 has a ventilation portion 53 between the first light source 11 and the second light source 12 in the up-down direction. The ventilation portion 53 is provided so as to penetrate the first base portion 51 in the front-rear direction. The provision of the ventilation portion 53 promotes heat dissipation in the portion between the first light source 11 and the second light source 12.

[0035] The control unit 60 controls the turning on and off of the first light source 11, the second light source 12, and the third light source 13. When forming an ADB pattern using the second light source 12, the control unit 60 turns off some of the second light sources 12 and turns on others, thereby setting an on mode (light blocking mode) in which the ADB pattern is not irradiated to a portion of the area, and dims or turns off the light source (here, the third light source 13) among the first light source 11 and the third light source 13 that forms the light-condensing pattern. Note that dimming or turning off the light source that forms the light-condensing pattern is not limited to when the light blocking mode is set. For example, when forming an ADB pattern using the second light source 12, the control unit 60 may dim or turn off the light source that forms the light-condensing pattern regardless of whether the light blocking mode is set.

[0036] Next, the operation of the vehicle lamp 100 configured as described above will be described. When the first light source 11 is turned on, a light ray L1 is emitted forward from the light-emitting surface 11a. As shown in FIG. 3, the light ray L1 is reflected upward or diagonally upward by the reflecting surface 21a of the first reflector 21, and reaches the second reflector 22. The light ray L1 that reaches the second reflector 22 is reflected forward by the reflecting surface 22a of the second reflector 22. The light ray L1 is incident on the entrance surface 41a to the first lens portion 41 of the projection lens 40. The light ray L1 that has entered the first lens portion 41 is emitted forward from the exit surface 41b.

[0037] Furthermore, by turning on the second light source 12, a light ray L2 is emitted forward from the light-emitting surface 12a. As shown in Fig. 3, the light ray L2 passes below the second reflector 22 and enters the first lens portion 41 of the projection lens 40 from the entrance surface 41a. The light ray L2 that has entered the first lens portion 41 is emitted forward from the exit surface 41b.

[0038] Furthermore, by turning on the third light source 13, a light ray L3 is emitted forward from the light-emitting surface 13a. As shown in FIG. 3, the light ray L3 enters the light guide 30 from the incident portion 31. The light ray L3 that entered the light guide 30 is reflected upward or obliquely upward by the first reflecting surface 32a and reaches the second reflecting surface 32b. The light ray L3 that reached the second reflecting surface 32b is internally reflected forward by the second reflecting surface 32b. The light ray L3 enters the second lens portion 42 of the projection lens 40 from the incident surface 42a. The light ray L3 that entered the second lens portion 42 is emitted forward from the exit surface 42b.

[0039] Fig. 9 is a diagram showing an example of an irradiation pattern projected onto a virtual screen in front of a vehicle, and shows a pattern corresponding to a vehicle that drives on the left side of the road. In Fig. 9, the V line indicates the vertical line of the screen, and the H line indicates the horizontal lines on the left and right sides of the screen. In Fig. 9, the V line is shown commonly for multiple irradiation patterns.

[0040] The light beam L1 emitted forward from the exit surface 41b of the first lens portion 41 of the projection lens 40 forms a diffusion pattern P1b, which is a part of the low beam pattern P1, in front of the vehicle.

[0041] A light condensing pattern P1a, which is a part of the low beam pattern P1, is formed ahead of the vehicle by the light beam L3 emitted forward from the exit surface 42b of the second lens portion 42 of the projection lens 40. The light condensing pattern P1a includes a cutoff line CL. The cutoff line CL includes horizontal cutoff lines CLa and CLc and an oblique cutoff line CLb.

[0042] The light ray L3 forms a cutoff line CL by being emitted from the second lens portion 42 via the cutoff forming portion 35. Horizontal cutoff lines CLa and CLc are formed by the light ray passing through the first straight portion 35a and the second straight portion 35c of the cutoff forming portion 35. Furthermore, an oblique cutoff line CLb is formed by the light ray passing through the inclined portion 35b of the cutoff forming portion 35.

[0043] An ADB pattern P2 is formed in front of the vehicle by light rays L2 emitted forward from the exit surface 41b of the first lens portion 41 of the projection lens 40. The ADB pattern P2 is formed as a pattern P2a, part of which is not illuminated, by turning off part of the second light source 12 (shading mode).

[0044] Fig. 10 is a diagram showing an example in which the irradiation patterns shown in Fig. 9 are superimposed. In Fig. 10, V lines indicate vertical lines on the screen, and H lines indicate horizontal lines on the left and right sides of the screen. In Fig. 10, the V lines are shown in common for multiple irradiation patterns.

[0045] As shown in FIG. 10, by turning on the first light source 11 and the third light source 13, a low beam pattern P1 is formed in which a condensed pattern P1a and a diffused pattern P1b are overlapped.

[0046] By turning on the first light source 11, the second light source 12, and the third light source 13, a composite pattern P3 is formed in which the low beam pattern P1 and the ADB pattern P2 are superimposed.

[0047] By turning off a part of the second light source 12 from the composite pattern P3, it is possible to set the composite pattern P3 to a lighting mode (shading mode) in which a part of the ADB pattern P2 is not illuminated. In this case, the composite pattern P3 is formed by overlapping the low beam pattern P1 and the shading pattern P2a in which a part of the ADB pattern P2 is not illuminated.

[0048] When forming the shading pattern P2a, the control unit 60 can dim or turn off some of the multiple third light sources 13 that form the light-collecting pattern P1a including the cutoff line CL in the low beam pattern P1.

[0049] For example, when the light-blocking pattern P2a is formed by dimming some of the third light sources 13, a composite pattern P3b is formed in which the brightness of the light-collecting pattern P1a is reduced.

[0050] Furthermore, when some of the multiple third light sources 13 are turned off when forming the shading pattern P2a, the concentrating pattern P1a is not irradiated, i.e., a composite pattern P3c is formed in which the diffusing pattern P1b and the shading pattern P2a overlap.

[0051] As described above, the vehicle lamp 100 according to this embodiment includes the first light source unit U1 that emits light forward, the second light source unit U2 that is disposed integrally with the first light source unit U1 on the left or right side of the first light source unit U1 and emits light forward, and the projection lens 40 that is formed from a single member and projects the light emitted forward from the first light source unit U1 and the second light source unit U2 toward the front of the vehicle. The first light source unit U1 includes one or more first light sources 11 that emit light forward to form a part of the low beam pattern P1, a first reflector 21 that is disposed in front of the first light source 11 and reflects the light from the first light source 11 upward, and a second reflector 22 that is disposed above the first reflector 21 and reflects the light reflected by the first reflector 21 forward. The second light source unit U2 has a plurality of second light sources 12 arranged above the first light source 11 and below and behind the second reflector 22, and emitting light forming an ADB pattern forward so that the light passes below the second reflector 22. The second light source unit U2 has one or more third light sources 13 that emit light forming part of the low beam pattern P1 forward, and a light guide 30 arranged in front of the third light sources 13, and having an incident section 31 on which light from the third light sources 13 is incident, a light guide section 32 that guides the light incident from the incident section 31 upward and internally reflects it forward, and an exit surface 33 that emits the light guided by the light guide section 32 forward, and a cutoff forming section 35 that forms a cutoff line CL of the low beam pattern P1 is provided on one of the second reflector 22 and the light guide 30.

[0052] According to this configuration, the first light source unit U1 and the second light source unit U2 are integrated, the cutoff forming portion 35 is provided on one of the second reflector 22 and the light guide 30, and the projection lens 40 is formed from a single member, thereby providing a vehicle lamp 100 that can reduce the number of parts and assembly labor.

[0053] In the vehicle lamp 100 according to this embodiment, the first light source unit U1 is disposed on the inner side of the vehicle relative to the second light source unit U2.

[0054] According to this configuration, a layout can be created in which a first light source unit U1 including a first light source 11 for forming part of a low beam pattern and a second light source 12 for forming an ADB pattern is positioned inside the vehicle.

[0055] In the vehicle lamp 100 of this embodiment, the projection lens 40 has a first lens portion 41 corresponding to the first light source unit U1 and a second lens portion 42 corresponding to the second light source unit U2, arranged side by side, and the first lens portion 41 is arranged above the second lens portion 42.

[0056] According to this configuration, when the second light source unit U2 having the light guide 30 is placed on the outside of the vehicle relative to the first light source unit U1, by placing the light guide 30 with a larger vertical dimension, a layout can be created that corresponds to the slant shape of the projection lens 40.

[0057] In the vehicle lamp 100 according to this embodiment, one of the first light source 11 and the third light source 13 forms a light-concentrating pattern P1a including a cutoff line CL, and the other of the first light source 11 and the third light source 13 forms a diffusion pattern P1b around the light-concentrating pattern P1a.

[0058] According to this configuration, the light converging pattern P1a and the light diffusing pattern P1b can be appropriately formed.

[0059] The vehicle lamp 100 according to this embodiment further includes a control unit 60 that controls the turning on and off of the first light source 11, the second light source 12, and the third light source 13. When a shading mode is selected in which some of the second light sources 12 are turned off and other second light sources 12 are turned on, the control unit 60 dims or turns off the light sources that form the light-concentrating pattern P1a among the first light source 11 and the third light source 13.

[0060] According to this configuration, when the ADB pattern is in the light blocking mode, the light-collecting pattern P1a is dimmed or turned off, thereby making it possible to suppress glare near the H line.

[0061] In the vehicle lamp 100 according to this embodiment, the first light source unit U1 has a ventilation section 53 between the first light source 11 and the second light source 12, which allows gas to circulate in the front-rear direction.

[0062] According to this configuration, the ventilation section 53 can promote heat dissipation from the first light source 11 and the second light source 12.

[0063] The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the cutoff formation portion 35 is provided at the edge portion 34 of the light guide 30, but the present invention is not limited to this configuration.

[0064] Fig. 11 is a perspective view showing another example of the first reflector and the second reflector. Fig. 12 is a perspective view showing another example of the light guide. For example, as shown in Fig. 11, the reflector 20A may have an edge portion 24 at the lower end of the reflective surface 22a of the second reflector 22, and a cutoff forming portion 25 at the edge portion 24. The cutoff forming portion 25 has a first linear portion 25a, an inclined portion 25b, and a second linear portion 25c. The first linear portion 25a and the second linear portion 25c are portions for forming the horizontal cutoff lines CLa and CLc (see Fig. 9) of the low beam pattern. The inclined portion 25b is a portion for forming the oblique cutoff line CLb (see Fig. 9) of the low beam pattern.

[0065] In this case, as shown in FIG. 12, the edge portion 34 of the light guide 30A is not provided with a cutoff forming portion.

[0066] By using the reflector 20A shown in FIG. 11 and the light guide 30A shown in FIG. 12 instead of the reflector 20 and the light guide 30 described above, a concentrated light pattern is formed in front of the vehicle when the first light source 11 is turned on, and a diffused light pattern is formed in front of the vehicle when the third light source 13 is turned on.

[0067] Furthermore, in the configuration of the above embodiment, the light collection pattern P1a is configured to illuminate the range in the vicinity of the intersection of the vertical line and the horizontal line, but the present invention is not limited to this configuration.

[0068] Fig. 13 is a diagram showing an example of an irradiation pattern projected onto a virtual screen in front of a vehicle, and shows a pattern corresponding to a vehicle that drives on the left side of the road. Fig. 14 is a diagram showing an example in which the irradiation patterns shown in Fig. 13 are superimposed. In Figs. 13 and 14, V lines indicate vertical lines on the screen, and H lines indicate horizontal lines on the left and right sides of the screen. In Figs. 13 and 14, the V line is commonly shown for multiple irradiation patterns.

[0069] As shown in Fig. 13, the light-collecting pattern P1c including the cutoff line CL may be configured to irradiate approximately the same range in the vertical and horizontal directions as the diffused pattern P1b. As a result, when the light-collecting pattern P1c and the diffused pattern P1b are overlapped to form the low beam pattern P1, as shown in Fig. 14, the low beam pattern P1 can be brightened over its entirety.

[0070] Even in a configuration in which the light-collecting pattern P1c irradiates substantially the same range as the diffused pattern P1b in the vertical and horizontal directions, a composite pattern P4 can be formed by overlapping the low beam pattern P1 and the ADB pattern P2, as in the above embodiment. Similarly, it is possible to appropriately form a composite pattern P4a in which the ADB pattern is used as the shading pattern P2a, a composite pattern P4b in which the light-collecting pattern P1c is dimmed when the composite pattern P4a is formed, and a composite pattern P4c in which the light-collecting pattern P1c is turned off when the composite pattern P4a is formed.

[0071] In this way, the degree of freedom in design can be increased for a configuration in which one of the first light source 11 and the third light source 13 forms a light-collecting pattern and the other forms a light-diffusing pattern. [Explanation of symbols]

[0072] CL...cutoff line, CLa, CLc...horizontal cutoff line, CLb...diagonal cutoff line, L1, L2, L3...light ray, P1...low beam pattern, P1a, P1c...concentrated pattern, P1b...diffused pattern, P2...ADB pattern, P2a...shading pattern, P3, P3a, P3b, P3c, P4, P4a, P4b, P4c...composite pattern, U1...first light source unit, U2...second light source unit, 11...first light source, 11a, 12a, 13a...light-emitting surface, 12...second light source, 13...third light source, 14, 15, 16...board, 14a, 15a, 16a...mounting surface, 20, 20A...reflector, 21...first reflector, 21a, 22 a, 31c...reflecting surface, 22...second reflector, 24...edge portion, 25, 35...cutoff forming portion, 25a, 35a...first straight portion, 25b, 35b...inclined portion, 25c, 35c...second straight portion, 30, 30A...light guide, 31...incident portion, 31a...opposite incident surface, 31b...side incident surface, 32...light guide portion, 32a...first reflecting surface, 32b...second reflecting surface, 32c...rear surface of light guide portion, 33, 41b, 42b...exit surface, 34...edge portion, 40...projection lens, 41...first lens portion, 41a, 42a...incident surface, 42...second lens portion, 50...support member, 51...first base portion, 52...second base portion, 53...ventilation portion, 54...fin, 60...control portion, 100...vehicle lamp

Claims

1. a first light source unit that emits light forward; a second light source unit disposed integrally with the first light source unit on the left or right of the first light source unit and emitting light forward; a projection lens formed of a single member that projects the light emitted forward from the first light source unit and the second light source unit toward the front of the vehicle; Equipped with The first light source unit is one or more first light sources that emit light forward to form a part of a low beam pattern; a first reflector disposed in front of the first light source and reflecting light from the first light source upward; a second reflector disposed above the first reflector and reflecting the light reflected by the first reflector forward; a plurality of second light sources that are arranged above the first light source and below and behind the second reflector, and that emit light forward to form an ADB pattern so as to pass below the second reflector; and The second light source unit is one or more third light sources that emit light forward to form a part of a low beam pattern; a light guide disposed in front of the third light source, the light guide having an incident portion into which light from the third light source is incident, a light guide portion that guides the light incident from the incident portion upward and internally reflects it forward, and an emission portion that emits the light guided by the light guide portion forward; and A cutoff forming portion that forms a cutoff line of the low beam pattern is provided on one of the second reflector and the light guide. Vehicle lighting fixtures.

2. The first light source unit is disposed on the inner side of the vehicle relative to the second light source unit.

2. A vehicle lamp according to claim 1.

3. the projection lens has a first lens portion corresponding to the first light source unit and a second lens portion corresponding to the second light source unit, which are arranged side by side on the left and right, The first lens portion is disposed above the second lens portion.

3. A vehicle lamp according to claim 2.

4. one of the first light source and the third light source forms a light-collecting pattern including the cutoff line; The other of the first light source and the third light source forms a diffusion pattern around the light-collecting pattern.

2. A vehicle lamp according to claim 1.

5. a control unit that controls turning on and off the first light source, the second light source, and the third light source; When the control unit is set to a lighting mode in which some of the second light sources are turned off and other second light sources are turned on, the control unit dims or turns off light sources that form the light-collecting pattern among the first light sources and the third light sources.

5. A vehicle lamp according to claim 4.

6. The first light source unit has a ventilation section between the first light source and the second light source, through which gas flows in a front-rear direction.

2. A vehicle lamp according to claim 1.

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