Vehicular lighting fixture

Abstract

To reduce limitations on layout in the case where a plurality of light sources is arranged.SOLUTION: A vehicular lighting fixture includes: a plurality of light sources arranged in the left-to-right direction in a vehicle mounted state, and arranged with a light emitting surface facing upward or downward; a reflector which is arranged in the direction which the light emitting surface faces with respect to the plurality of light sources, and in which a plurality of reflection parts for reflecting the light from the plurality of light sources frontward is arranged in the left-to-right direction; a projection lens which is arranged in front of the reflector, and in which a plurality of lens parts for emitting the light reflected by the reflection part to the vehicle front and for forming an irradiation pattern is arranged in the left-to-right direction; and a partition member which is arranged between the reflector and the projection lens, which has a plurality of light shielding wall parts for partitioning a space between the reflection part and the lens part in the left-to-right direction, and in which the light shielding wall part is formed in a state where a plate material is bent.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A vehicle lamp that forms an ADB pattern in front of a vehicle is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-3832 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, a configuration has been considered in which an ADB pattern is formed in front of a vehicle using a vehicle lamp that includes, for example, multiple light sources, a reflector provided for each light source and having a reflective surface that reflects light from each light source toward the front of the vehicle, and a projection lens that emits the light reflected by each reflective surface. For such vehicle lamps, a configuration that minimizes layout restrictions when arranging multiple light sources is required.

[0005] The present invention has been made in view of the above, and has an object to provide a vehicle lamp that can reduce layout restrictions when arranging a plurality of light sources. [Means for solving the problem]

[0006] The vehicle lamp of the present invention comprises: a plurality of light sources arranged in the left-right direction when mounted on a vehicle, with their light-emitting surfaces facing upward or downward; a reflector arranged in the direction in which the light-emitting surface faces the plurality of light sources, with a plurality of reflective portions arranged in the left-right direction that reflect light from the plurality of light sources forward; a projection lens arranged in front of the reflector, with a plurality of lens portions arranged in the left-right direction that emits light reflected by the reflective portions forward of the vehicle to form an illumination pattern; and a partition member arranged between the reflector and the projection lens, with a plurality of light-shielding wall portions that divide the space between the reflecting portions and the lens portions in the left-right direction, and in which the light-shielding wall portions are formed when a plate material is bent. [Effects of the Invention]

[0007] According to the present invention, layout restrictions when arranging a plurality of light sources are reduced. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of a vehicle lamp according to this embodiment. [Figure 2] FIG. 2 is a diagram showing an example of a vehicle lamp according to this embodiment. [Figure 3] FIG. 3 is a diagram showing an example of a vehicle lamp according to this embodiment. [Figure 4] FIG. 4 is a diagram showing an example of a partition member. [Figure 5] FIG. 5 is a diagram showing an example of a partition member. [Figure 6] FIG. 6 is a diagram showing an example of a partition member. [Figure 7] FIG. 7 is a diagram showing an example of an irradiation pattern projected onto a virtual screen in front of a vehicle. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments 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 these embodiments. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially identical. In the following description, the directions of front and rear (front, rear), up and down (up and down), and left and right (left and right) refer to directions when the vehicle lamp is attached to a vehicle and viewed from the front while sitting in the driver's seat. In this embodiment, the up and down direction is parallel to the vertical direction, and the left and right direction is horizontal.

[0010] 1 to 3 are diagrams showing an example of a vehicle lamp 100 according to this embodiment. Fig. 1 is an exploded perspective view, Fig. 2 is a perspective view of the assembled state seen from above the front side, and Fig. 3 is a view seen from the front.

[0011] The vehicular lamp 100 shown in Figures 1 to 3 is used as a headlamp of a vehicle. The vehicular lamp 100 is attached to the front left or right of the vehicle, for example. The following description will be given taking as an example a vehicular lamp 100 mounted on the front right side of the vehicle. Therefore, in the vehicular lamp 100, the left side in the left-right direction is the inside of the vehicle, and the right side in the left-right direction is the outside of the vehicle. Note that a vehicular lamp attached to the front left side of the vehicle can be configured symmetrically left and right with respect to the vehicular lamp 100.

[0012] The vehicle lamp 100 includes a light source 10, a reflector 20, a projection lens 30, a partition member 40, and a heat dissipation member 50. The vehicle lamp 100 forms an illumination pattern ahead of the vehicle.

[0013] The light source 10 is a semiconductor light source such as an LED. A plurality of light sources 10 are provided in the left-right direction. In this embodiment, for example, seven light sources 10 are provided. The light source 10 has a light-emitting surface 11 that emits light. When the vehicle lamp 100 is attached to a vehicle, the light-emitting surface 11 is, for example, directed upward and arranged parallel to a horizontal plane. The light source 10 is attached to a substrate 12. The substrate 12 is held by a heat dissipation member 40. Circuits and the like for supplying power, electrical signals, and the like to the light source 10 are formed on the substrate 12.

[0014] The reflector 20 has a plurality of reflecting portions 21 and protrusions 22. A reflecting portion 21 is provided for each light source 10, for example. The reflecting portions 21 are arranged side by side in the left-right direction corresponding to each light source 10. The reflecting portions 21 are provided corresponding to the light sources 10. In this embodiment, the reflecting portions 21 and the light sources 10 are provided in a one-to-one correspondence. In other words, one reflecting portion 21 is provided for one light source 10.

[0015] Of the multiple light sources 10 and reflectors 21, the three light sources 10 and reflectors 21 on the inside of the vehicle are light sources and reflectors for forming a high beam. The fourth light source 10 and reflector 21 from the inside of the vehicle is a light source and reflector for forming a central portion of a low beam in the left-right direction, including a cutoff line. The fourth reflector 21 from the inside of the vehicle is provided with a cutoff forming portion 25 at its rear end (see FIG. 3). 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 horizontal cutoff lines CLa and CLc (see FIG. 7) of the low beam pattern. The inclined portion 25b is a portion for forming an oblique cutoff line CLb (see FIG. 7) of the low beam pattern. The cutoff forming portion 25 is disposed at the focal point of the projection lens 30 or in a position near the focal point. The three light sources 10 and reflecting portions 21 on the outside of the vehicle are light sources and reflecting portions for forming a diffusion portion around the center portion of the low beam.

[0016] The protruding portion 22 is disposed in front of and above the plurality of reflecting portions 21. The protruding portion 22 is plate-shaped, protrudes forward from the plurality of reflecting portions 21, and is disposed above the partition member 40, which will be described later. The protruding portion 22 has a curved shape that protrudes forward, for example, from both ends in the left-right direction toward the center. A locking portion 22s is provided at the front of the protruding portion 22 for locking the projection lens 30, which will be described later. The locking portions 22s are disposed, for example, at two locations in the left-right direction. Both ends of the protruding portion 22 in the left-right direction are bent downward to form side wall portions 22t.

[0017] The projection lens 30 forms an illumination pattern by emitting the light reflected by the reflecting portion 21 toward the front of the vehicle. The projection lens 30 has a shape that tilts rearward and upward from the inside of the vehicle toward the outside of the vehicle. Specifically, the projection lens 30 has a shape that tilts rearward from at least the center in the left-right direction toward the outside of the vehicle (see FIG. 1). Furthermore, the projection lens 30 has a shape that tilts upward from the inside of the vehicle toward the outside of the vehicle when viewed from the front (see the two-dot chain line in FIG. 3). The projection lens 30 has a plurality of lens portions 31. The plurality of lens portions 31 are arranged side by side in the left-right direction. Each lens portion 31 has an incident surface 31a and an exit surface 31b. The incident surface 31a receives the light reflected by the reflecting portion 21. The exit surface 31b emits the light that entered from the incident surface 31a toward the front of the vehicle.

[0018] The partitioning member 40 is disposed between the reflector 20 and the projection lens 30 in the front-to-rear direction. FIGS. 4 to 6 are diagrams showing an example of the partitioning member 40. FIG. 4 is a diagram showing a top view, FIG. 5 is a diagram showing a front view, and FIG. 6 is a diagram showing a side view (from inside the vehicle). The partitioning member 40 has a plurality of wall portions (light-shielding wall portions) 41 that divide the space between the reflecting portion 21 and the lens portion 31 in the left-right direction, and a bottom portion 42 and a ceiling portion 43 connected to the wall portions 41. The space between the reflecting portion 21 and the lens portion 31 is divided into a plurality of spaces K by the plurality of wall portions 41. Note that, between the reflecting portion 21 closest to the innermost side of the vehicle and the reflecting portion 21 closest to the outermost side of the vehicle, the space K is formed by the wall portions 41 and the side wall portion 22t of the reflector 20. The partitioning member 40 is configured such that a plurality of wall portions 41 are formed by bending a single plate material. The plate material constituting the partition member 40 may be made of a metal such as aluminum.

[0019] In this embodiment, the partition member 40 has, from the inside of the vehicle, a first bottom portion 42a, a first wall portion 41a, a first ceiling portion 43a, a second wall portion 41b, a second bottom portion 42b, a third wall portion 41c, a second ceiling portion 43b, a fourth wall portion 41d, a third bottom portion 42c, and a fifth wall portion 41e. The partition member 40 is configured such that the first bottom portion 42a, the first wall portion 41a, the first ceiling portion 43a, the second wall portion 41b, the second bottom portion 42b, the third wall portion 41c, the second ceiling portion 43b, the fourth wall portion 41d, the third bottom portion 42c, and the fifth wall portion 41e are formed by bending a single plate material.

[0020] The first bottom portion 42a is disposed horizontally. The first wall portion 41a is bent upward from the vehicle outer end portion of the first bottom portion 42a. The first ceiling portion 43a is bent from the upper end of the first wall portion 41a toward the vehicle outer side. The second wall portion 41b is bent downward from the vehicle outer end portion of the first ceiling portion 43a. The second bottom portion 42b is bent from the lower end of the second wall portion 41b toward the vehicle outer side. The third wall portion 41c is bent upward from the vehicle outer end portion of the second bottom portion 42b. The second ceiling portion 43b is bent from the upper end of the third wall portion 41c toward the vehicle outer end portion. The fourth wall portion 41d is bent downward from the vehicle outer end portion of the second ceiling portion 43b. The third bottom portion 42c is bent from the lower end of the fourth wall portion 41d toward the vehicle outer side. The fifth wall portion 41e is bent upward from the vehicle outer end of the third bottom portion 42c.

[0021] As described above, the projection lens 30 has a so-called slant shape that is inclined rearward and upward from at least the center in the left-right direction toward the outside of the vehicle. Therefore, in the partition member 40, the first wall portion 41a, the second wall portion 41b, the third wall portion 41c, the fourth wall portion 41d, and the fifth wall portion 41e are arranged to correspond to the slant shape of the projection lens 30.

[0022] In the partition member 40, the first wall portion 41a, the second wall portion 41b, and the third wall portion 41c protrude toward the front side (forward) relative to the bottom portion 42 and the ceiling portion 43. In addition, the fifth wall portion 41e protrudes toward the back side (rear) relative to the third bottom portion 42c.

[0023] In a front view (see FIG. 3), when the partitioning member 40 is supported by support portions 52 of the heat dissipation member 50 (described later), the partitioning member 40 is bent so that the height positions of the first wall portion 41a, the second wall portion 41b, the third wall portion 41c, the fourth wall portion 41d, and the fifth wall portion 41e gradually increase from the inside of the vehicle to the outside of the vehicle. The partitioning member 40 is also bent so that the height positions of the first bottom portion 42a, the second bottom portion 42b, and the third bottom portion 42c gradually increase from the inside of the vehicle to the outside of the vehicle. In this way, the partitioning member 40 is bent into a shape corresponding to the slant shape of the projection lens 30.

[0024] The first bottom portion 42a, the second bottom portion 42b, and the third bottom portion 42c are arranged along a plane (the same plane) that slopes upward from the inside of the vehicle to the outside of the vehicle. The partition member 40 is bent so that the height positions of the first ceiling portion 43a and the second ceiling portion 43b gradually increase from the inside of the vehicle to the outside of the vehicle. The first ceiling portion 43a and the second ceiling portion 43b are arranged along a same plane that slopes upward from the inside of the vehicle to the outside of the vehicle.

[0025] The surface of the partitioning member 40 is colored, for example, black. Note that the partitioning member 40 may be colored a color other than black.

[0026] The heat dissipation member 50 dissipates heat generated by the light source 10. The heat dissipation member 50 has a base portion 51. The base portion 51 is plate-shaped and holds the substrate 12 of the light source 10. A light-shielding portion 51a is provided on the base portion 51. The light-shielding portion 51a is disposed in front of the light source 10 when the substrate 12 is attached. A light-shielding portion 51a is provided for each light source 10. The light-shielding portion 51a blocks light directed forward from the light-emitting surface 11 of the light source 10. The light-shielding portion 51a has a shape in which a portion of the base portion 41 rises upward. The configuration of the light-shielding portion 51a is not limited to this configuration.

[0027] The heat dissipation member 50 also has a support portion 52. The support portion 52 is flat and protrudes forward relative to the base portion 51. The support portion 52 is curved so as to protrude forward from both left and right ends toward the center. The support portion 52 has a shape corresponding to the protrusion 22 of the reflector 20 described above.

[0028] The support portion 52 is disposed in front of and below the base portion 51 via the connection portion 53. The support portion 52 is disposed so as to slope upward from the inside of the vehicle to the outside of the vehicle in a front view (see FIG. 3). The support portion 52 supports the underside of the partition member 40 described above. Specifically, the support portion 52 supports the lower surfaces of the first bottom portion 42a, the second bottom portion 42b, and the third bottom portion 42c of the partition member 40. The lower surfaces of the first bottom portion 42a, the second bottom portion 42b, and the third bottom portion 42c are disposed in surface contact with the upper surface of the support portion 52.

[0029] 2 and 3, when the partition member 40 is placed on the support portion 52, a protrusion 22 of the reflector 20 is provided on the upper surface of the partition member 40. The protrusion 22 is flat and provided so as to protrude forward relative to the plurality of reflecting portions 21. The protrusion 22 is arranged so as to cover the upper side of the partition member 40. By providing the protrusion 22, it is possible to prevent light passing between the plurality of wall portions 41 from leaking to the outside from above.

[0030] Next, the operation of the vehicle lamp 100 configured as described above will be described. When each light source 10 of the vehicle lamp 100 is turned on, light rays are emitted upward from the light-emitting surface 11. The light rays are reflected forward by the reflecting portions 21 corresponding to each light source 10, pass through the space partitioned by the wall portions 41 of the partitioning member 40, and reach the projection lens 30. The light that reaches the projection lens 30 enters through the entrance surface 31a and exits through the exit surface 31b, forming an illumination pattern in front of the vehicle.

[0031] Fig. 7 shows an example of an irradiation pattern PF 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. 7, lines VV indicate vertical lines on the screen, and lines HH indicate horizontal lines on the left and right sides of the screen. In addition, the intersection of the vertical and horizontal lines is assumed to be the horizontal reference position.

[0032] For example, a high beam pattern P2 is formed by light rays emitted from three light sources 10 on the inside of the vehicle among the plurality of light sources 10. Further, a low beam pattern P1 is formed by light rays emitted from the other light sources 10 excluding the three light sources 10.

[0033] Specifically, a central portion P1a in the left-right direction of the low beam pattern P1 is formed by light rays emitted from the fourth light source 10 from the inside of the vehicle. The central portion P1a is a portion that includes the cutoff line CL. The light rays that form the central portion P1a reach the projection lens 30 via the cutoff forming portion 25 of the reflecting portion 21, thereby forming the cutoff line CL. The horizontal cutoff lines CLa and CLc are formed by light rays that pass through the first straight portion 25a and the second straight portion 25c of the cutoff forming portion 25. Furthermore, an oblique cutoff line CLb is formed by light rays that pass through the inclined portion 25b of the cutoff forming portion 25.

[0034] Furthermore, a diffusion portion P1b around a central portion P1a of the low beam pattern P1 is formed by the light rays emitted from the three light sources 10 outside the vehicle. Note that multiple illumination areas may be formed by the light rays from the three light sources 10 outside the vehicle.

[0035] As described above, the vehicle lamp 100 of this embodiment comprises: a plurality of light sources 10 arranged in the left-right direction when mounted on a vehicle, with the light-emitting surface 11 facing upward; a reflector 20 arranged above the plurality of light sources 10, with a plurality of reflective sections 21 arranged in the left-right direction that reflect light from the plurality of light sources 10 forward; a projection lens 30 arranged in front of the reflector 20, with a plurality of lens sections 31 arranged in the left-right direction that emit the light reflected by the reflective sections 21 forward of the vehicle to form an illumination pattern; and a partition member 40 arranged between the reflector 20 and the projection lens 30, with a plurality of wall sections 41 that divide the space between the reflective sections 21 and the lens sections 31 in the left-right direction, the partition member 40 having the wall sections 41 formed by bending a plate material.

[0036] According to this configuration, the partitioning member 40, which is formed by bending a plate material, forms multiple walls 41 that divide the space between the reflecting unit 21 and the lens unit 31 in the left-right direction, thereby reducing the thickness of the walls 41. This reduces layout restrictions when arranging multiple light sources 10. For example, by reducing the thickness of the walls 41, the space between the reflecting unit 21 and the lens unit 31 that is divided by the multiple walls 41 becomes larger. Therefore, light reflected by the reflecting unit 21 can appropriately reach the lens unit 31 without forming a reflective portion such as a knurled portion on the wall 41, eliminating the need to form a vapor deposition film or the like on the surface of the wall 41. Furthermore, this allows the left-right distance between adjacent wall units 41 to be freely set, thereby increasing the degree of freedom in arranging the light sources 10, for example.

[0037] In the vehicle lamp 100 according to this embodiment, the reflector 20 has a protruding portion 22 that protrudes forward and upward from the plurality of reflecting portions 21, and the protruding portion 22 is arranged to cover the upper side of the partition member 40.

[0038] According to this configuration, the upper side of the partition member 40 is covered by the protruding portion 22 of the reflector 20, so that it is possible to prevent the light reflected by the reflecting portion 21 from leaking to the outside.

[0039] In the vehicle lamp 100 according to this embodiment, the protrusion 22 is in the shape of a flat plate.

[0040] According to this configuration, since the protruding portion 22 is flat, the protruding portion 22 can be easily molded.

[0041] In the vehicle lamp 100 of this embodiment, the projection lens 30 is formed so that when mounted on the vehicle, it has a shape that tilts upward and rearward from at least the center in the left-right direction toward the outside of the vehicle, and the partition member 40 has multiple wall portions 41 arranged to correspond to the shape of the projection lens 30.

[0042] According to this configuration, the partition member 40 can easily arrange the multiple wall portions 41 in an arrangement corresponding to the so-called slant shape of the projection lens 30 .

[0043] The vehicle lamp 100 according to this embodiment further comprises a heat dissipation member 50 that dissipates heat generated by the plurality of light sources 10 , and the heat dissipation member 50 has a support portion 52 that covers the underside of the partition member 40 .

[0044] According to this configuration, the lower side of the partition member 40 is covered by the support portion 52 of the heat dissipation member 50, so that it is possible to prevent the light reflected by the reflecting portion 21 from leaking to the outside.

[0045] 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, a configuration in which the light-emitting surfaces 11 of the multiple light sources 10 are arranged facing upward and the reflector 20 is arranged above the multiple light sources 10, in the direction in which the light-emitting surfaces 11 face the multiple light sources 10, has been described as an example, but the present invention is not limited to this configuration. A configuration in which the light-emitting surfaces 11 of the multiple light sources 10 are arranged facing downward and the reflector 20 is arranged below the direction in which the light-emitting surfaces 11 face the multiple light sources 10, i.e., a configuration in which the configuration of the above-described embodiment is upside down, may also be used. [Explanation of symbols]

[0046] CL...cutoff line, CLa, CLc...horizontal cutoff line, CLb...oblique cutoff line, K...space, P1...low beam pattern, P2...high beam pattern, PF...irradiation pattern, P1a...center portion, P1b...diffusing portion, 10...light source, 11...light emitting surface, 12...substrate, 20...reflector, 21...reflective portion, 22...protruding portion, 22s...engaging portion, 22t...side wall portion, 25...cutoff forming portion, 25a...first straight portion, 25b...inclined portion, 25c...second Two straight portions, 30...projection lens, 31...lens portion, 31a...incident surface, 31b...exiting surface, 40...compartment member, 41...wall portion, 41a...first wall portion, 41b...second wall portion, 41c...third wall portion, 41d...fourth wall portion, 41e...fifth wall portion, 42...bottom portion, 42a...first bottom portion, 42b...second bottom portion, 42c...third bottom portion, 43...ceiling portion, 43a...first ceiling portion, 43b...second ceiling portion, 50...heat dissipation member, 51...base portion, 52...support portion, 53...connecting portion, 100...vehicle lamp

Claims

1. a plurality of light sources arranged in the left-right direction when mounted on a vehicle, with light-emitting surfaces facing upward or downward; a reflector arranged in a direction in which the light emitting surface faces the plurality of light sources, and having a plurality of reflecting portions arranged in the left-right direction to reflect light from the plurality of light sources forward; a projection lens disposed in front of the reflector, the projection lens including a plurality of lens portions disposed in the left-right direction and configured to emit the light reflected by the reflecting portion forward of the vehicle to form an irradiation pattern; a partition member that is disposed between the reflector and the projection lens, has a plurality of light-shielding wall portions that partition a space between the reflecting portion and the lens portion in the left-right direction, and the light-shielding wall portions are formed in a state where a plate material is bent; A vehicle lighting fixture comprising:

2. The plurality of light sources are arranged with the light-emitting surfaces facing upward, the reflector is disposed above the plurality of light sources; the reflector has a plurality of protruding portions that protrude forward and upward from the reflecting portions, The protrusion is disposed so as to cover the upper side of the partition member.

2. A vehicle lamp according to claim 1.

3. The protrusion is flat.

3. A vehicle lamp according to claim 2.

4. the projection lens is formed so as to have a shape that is inclined upward and rearward from at least a central portion in the left-right direction toward the outside of the vehicle when mounted on the vehicle, The partition member has a plurality of light-shielding wall portions arranged in accordance with the shape of the projection lens.

2. A vehicle lamp according to claim 1.

5. a heat dissipation member that dissipates heat generated by the plurality of light sources, The heat dissipation member has a support portion that covers the underside of the partition member.

2. A vehicle lamp according to claim 1.

Images