Vehicle lighting fixtures

Abstract

To provide a lighting fixture for a vehicle that can improve cooling performance.SOLUTION: A lighting fixture for a vehicle includes: a substrate 10 to which a light source 11 is mounted; a bracket 20 fitted to the substrate 10 and including an aiming mechanism; and a heat plate 30 disposed between the substrate 10 and the bracket 20 and having a heat radiation property that is higher than those of the substrate 10 and the bracket 20. The bracket 20 includes an opening part 21 for partially exposing the heat plate 30 to the outside from a back side of the bracket 20.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] Conventionally, a vehicle lamp equipped with a cooling member for dissipating heat generated by a light source such as a semiconductor light emitting element has been proposed. The vehicle lamp also includes a bracket with an aiming mechanism, and the aiming mechanism adjusts the optical axis (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-225240 Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle lamp described in Patent Document 1, the cooling member is disposed so as to be sandwiched between the light source (substrate) and the bracket. As a result, the cooling member is easily trapped between the two, which may result in a decrease in cooling performance.

[0005] The present invention has been made to solve the above-mentioned problems in the prior art, and an object of the present invention is to provide a vehicle lamp that can improve cooling performance. [Means for solving the problem]

[0006] A vehicle lamp according to one aspect of the present disclosure includes: Multiple light sources that emit light in one direction Light source On one side The mounted board and The opposite side of the one side The substrate Back ofa bracket attached to the substrate and having an aiming mechanism; and a heat plate disposed between the substrate and the bracket and having higher heat dissipation properties than the substrate and the bracket, wherein the bracket has an opening that exposes a part of the heat plate from the rear side of the bracket. The openings may collectively expose a plurality of positions on the heat plate corresponding to the plurality of light sources, or the openings may individually expose a plurality of positions on the heat plate corresponding to each of the plurality of light sources. . [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a vehicle lamp that can improve cooling performance. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic side cross-sectional view showing a vehicle lamp according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing the lamp unit shown in FIG. [Figure 3] FIG. 2 is an exploded perspective view showing the lamp unit shown in FIG. [Figure 4] 3 is a front view showing a partial configuration of the lamp unit shown in FIG. 2. FIG. [Figure 5] FIG. 2 is a side cross-sectional view of the lamp unit shown in FIG. [Figure 6] FIG. 3 is a rear view of the lamp unit shown in FIG. 2. [Figure 7] FIG. 10 is a rear view showing a modified example of the lamp unit according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] 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 it goes without saying that publicly known or well-known technologies are applied as appropriate to the details of the omitted technologies within the scope of the content described below.

[0010] Fig. 1 is a schematic side cross-sectional view showing a vehicle lamp according to this embodiment. As shown in Fig. 1, the vehicle lamp 1 according to this embodiment is configured as a headlamp provided, for example, on the left front side of a vehicle, and includes a housing H that opens toward the front of the vehicle, and a plain outer cover OC that is made of a light-transmitting resin or the like and is attached to the housing H so as to cover the opening of the housing H. The vehicle lamp 1 includes a lamp unit LU in a lamp chamber formed by the housing H and an outer lens OL. The lamp unit LU is supported by the housing H via an aiming mechanism E, and the optical axis is adjusted by the aiming mechanism E.

[0011] Fig. 2 is a front view showing the lamp unit LU shown in Fig. 1, and Fig. 3 is an exploded perspective view showing the lamp unit LU shown in Fig. 1. As shown in Fig. 2 and Fig. 3, the lamp unit LU comprises a substrate 10, a bracket 20, a heat plate 30, and a lens member 40. These components are fastened together by screws S.

[0012] The substrate 10 is equipped with a plurality of light sources 11 and a power supply unit 12. The power supply unit 12 is configured by, for example, a connector, and by connecting a mating connector that is connected to a battery or the like, it becomes possible to supply current to the plurality of light sources 11.

[0013] Fig. 4 is a front view showing a partial configuration of the lamp unit LU shown in Fig. 2. Fig. 4 shows a state in which the lens member 40 has been removed. As shown in Fig. 4, in this embodiment, the plurality of light sources 11 is made up of six light sources 11, which are arranged in multiple rows. The first to third light sources 11a to 11c are arranged side by side in the left-right direction to form a first light source row A1, and the fourth to sixth light sources 11d to 11f are also arranged side by side in the left-right direction to form a second light source row A2.

[0014] The first to third light sources 11a to 11c constituting the first light source array A1 and the fourth to sixth light sources 11d to 11f constituting the second light source array A2 are arranged with a vertical offset. Therefore, each of the light sources 11a to 11f is provided at a position vertically offset from at least one of the other light sources 11a to 11f. For example, the first light source 11a is provided with a vertical offset from the fourth to sixth light sources 11d to 11f.

[0015] In this embodiment, the light sources 11a to 11f that are disposed with a vertical offset are also disposed with a horizontal offset. For example, the first light source 11a and the fourth to sixth light sources 11d to 11f that are disposed with a vertical offset from the first light source 11a are also disposed with a horizontal offset. The same is true for the second light source 11b to the sixth light source 11f. In this way, each of the multiple light sources 11 is disposed with a horizontal offset from the other light sources 11.

[0016] 2 to 4, the bracket 20 is a resin member to which the substrate 10 is attached via screws S. The bracket 20 has an aiming function, and is provided with an aiming fulcrum portion E1 and aiming operation portions E2 and E3.

[0017] The aiming operation portions E2 and E3 are portions into which the aiming screw ES (see FIG. 1) and the like are inserted. The aiming operation portions E2 and E3 move in the front-to-rear direction as the aiming screw ES rotates. Here, the first aiming operation portion E2 is provided vertically below the aiming fulcrum portion E1, and the second aiming operation portion E3 is provided offset horizontally from the aiming fulcrum portion E1. Therefore, as the aiming operation portions E2 and E3 move back and forth through the rotation of the aiming screw ES, the bracket 20 rotates around the aiming fulcrum portion E1. Thus, the optical axes of the multiple light sources 11 mounted on the substrate 10 are adjusted.

[0018] The heat plate 30 is a plate material arranged between the substrate 10 on which the light source 11 is mounted and the bracket 20 (see FIG. 3). The heat plate 30 is made of a steel plate and has higher heat dissipation properties than the substrate 10 and the bracket 20. In this embodiment, the heat plate 30 is made of a flat plate, but is not limited to this, and may be partially or entirely curved, or may have bent portions. Furthermore, other members may be mounted on the heat plate 30.

[0019] The lens member 40 is made of a light-transmitting member and is provided in the light emission direction of the light source 11. Fig. 5 is a side cross-sectional view of the lamp unit LU shown in Fig. 1. In Fig. 5, the lens member 40 is indicated by a dashed line.

[0020] 2, 3, and 5, the lens member 40 includes a plurality of optical lens portions 41, 42, a mounting portion 43, and foot portions 44, 45. The plurality of optical lens portions 41, 42 are arranged to cover the light source arrays A1, A2 (see FIG. 4) for each row. That is, the first optical lens portion 41 is provided to cover the front of the first light source array A1. Similarly, the second optical lens portion 42 is provided to cover the front of the second light source array A2.

[0021] The mounting portion 43 supports the optical lens units 41 and 42 via foot units 44 and 45. The mounting portion 43 has screw holes 43a (see FIG. 3) for mounting the lens member 40 to the bracket 20. The lens member 40 is mounted on the bracket 20 side (substrate 10 side) by screws S inserted into the screw holes 43a. The mounting portion 43 also has extensions 43b that extend in the left-right direction to compensate for the offset, since the second optical lens unit 42 is positioned more inwardly of the vehicle than the first optical lens unit 41, as will be described later. As a result of having the extensions 43b, the mounting portion 43 has a substantially parallelogram-shaped outer shape when viewed from the front. The screw holes 43a are formed in the extensions 43b.

[0022] The feet 44, 45 connect the optical lens units 41, 42 to the mounting unit 43, and extend in the longitudinal direction of the vehicle to support the optical lens units 41, 42 forward of the mounting unit 43. More specifically, the feet 44, 45 extend rearward of an extension line (an extension line in a cross section) of the rear surface of the end of each of the optical lens units 41, 42, and are connected to the mounting unit 43, as shown in FIG.

[0023] 4, the second light source array A2, which is located on the vertically lower side of the plurality of light source arrays A1 and A2, is located closer to the vehicle interior (the other side in FIG. 4) than the first light source array A1, which is located on the vertically upper side. That is, when comparing the horizontal positions of the Nth (in this embodiment, N is an integer of 1 to 3) light sources 11 from the vehicle interior side for each of the first light source array A1 and the second light source array A2, the light sources 11 of the second light source array A2 are located closer to the vehicle interior than the light sources 11 of the first light source array A1. Therefore, with regard to the optical lens units 41 and 42 covering the light source arrays A1 and A2, the second optical lens unit 42, which is located on the vertically lower side, is located closer to the vehicle interior than the first optical lens unit 41. Therefore, the light sources 11 and the optical lens units 41 and 42 are disposed at appropriate positions according to the slant shape of the vehicle.

[0024] Furthermore, in this embodiment, the bracket 20 has an opening 21. Fig. 6 is a rear view of the lamp unit LU shown in Fig. 2. As shown in Fig. 6, the opening 21 is configured to expose a portion of the heat plate 30 from the rear side of the bracket 20. Such an opening 21 makes it easier to cool the heat plate 30 sandwiched between the substrate 10 and the bracket 20, improving heat dissipation.

[0025] In particular, opening 21 is formed at a position corresponding to light source 11. This exposes the area directly behind light source 11, which is the area most likely to become hot. In particular, in this embodiment, opening 21 is configured to encompass and expose multiple positions on heat plate 30 corresponding to multiple light sources 11. This allows for a large opening 21 that encompasses the area of ​​heat plate 30 where heat from light source 11 is easily transferred, allowing for smooth air inflow and improving heat dissipation.

[0026] Here, the opening 21 is not limited to that shown in Fig. 6. Fig. 7 is a rear view showing a modified example of the lamp unit LU according to the present embodiment. As shown in Fig. 7, the opening 21 of the bracket 20 may be configured to individually expose multiple positions on the heat plate 30 corresponding to multiple light sources 11. This improves the rigidity of the bracket 20 while exposing the portions of the heat plate 30 to which heat from the light sources 11 is easily transferred, thereby reducing the possibility of the bracket 20 being distorted during aiming adjustment.

[0027] 6 and 7, the opening 21 may be one that exposes, for example, a portion near (for example, 5 mm or less from) the position on the heat plate 30 that corresponds to the light source 11. The opening 21 preferably includes the upper side of the position on the heat plate 30 that corresponds to the light source 11. This is because the temperature tends to be higher above the position on the heat plate 30 that corresponds to the light source 11 than below. The opening 21 is not limited to the above, and may be one that exposes, for example, an intermediate position between the positions on the heat plate 30 that correspond to multiple light sources 11.

[0028] Next, the operation of the vehicle lamp 1 according to this embodiment will be described. Assume that the light source 11 is turned on in the vehicle lamp 1 according to this embodiment. In this case, heat is generated from the light source 11. The heat from the light source 11 is transferred via the substrate 10 to the heat plate 30 provided on the back side of the substrate 10.

[0029] Here, the heat plate 30 is sandwiched between the substrate 10 and the bracket 20. Therefore, the heat plate 30 is positioned in a way that makes it difficult to dissipate heat. However, in the vehicle lamp 1 according to this embodiment, an opening 21 is formed in the bracket 20. This opening 21 exposes a portion of the heat plate 30 from the back side.

[0030] Therefore, heat generated by the light source 11 is transferred to the heat plate 30 and released through the openings 21. In particular, the openings 21 expose multiple positions on the heat plate 30 corresponding to the multiple light sources 11. This exposes areas where heat from the light source 11 is easily transferred, further improving heat dissipation.

[0031] 6, the opening 21 can be large enough to encompass the areas where heat is easily transferred, allowing air to flow in smoothly and improving heat dissipation. Also, when the opening 21 is as shown in Fig. 7, the rigidity of the bracket 20 is increased while exposing the areas where heat is easily transferred, thereby reducing the possibility of the bracket 20 being distorted during aiming adjustment.

[0032] Furthermore, as shown in FIG. 4, the first light source 11a is disposed vertically offset from the fourth to sixth light sources 11d to 11f and is disposed horizontally offset from the fourth to sixth light sources 11d to 11f, which are disposed vertically offset. Similarly, the second light source 11b is disposed vertically offset from the fourth to sixth light sources 11d to 11f and is disposed horizontally offset from the fourth to sixth light sources 11d to 11f, which are disposed vertically offset. Furthermore, the fourth light source 11d is disposed vertically offset from the first to third light sources 11a to 11c and is disposed horizontally offset from the first to third light sources 11a to 11c, which are disposed vertically offset. The same applies to the other light sources 11c, 11e, and 11f. In this way, each of the multiple light sources 11 is disposed horizontally offset from the other light sources 11, which are disposed vertically offset. This prevents the plurality of light sources 11 from being arranged so as to overlap each other in the vertical direction (prevents them from being arranged without misalignment in the horizontal direction). As a result, it is possible to prevent a situation in which heat from a light source 11 located vertically below is transferred to a light source 11 located vertically above, causing the upper light source 11 to become too hot.

[0033] Thus, in the vehicle lamp 1 according to this embodiment, the heat plate 30 is disposed between the substrate 10 on which the light source 11 is mounted and the bracket 20, and the bracket 20 has an opening 21 that exposes a portion of the heat plate 30 from the rear side. This allows the heat plate 30 to dissipate heat through the opening 21. Therefore, even if the heat plate 30 is sandwiched between the light source 11 (substrate 10) and the bracket 20, it is possible to easily promote heat dissipation from the heat plate 30. This can improve cooling performance.

[0034] Furthermore, as shown in Figure 6, when the opening 21 comprehensively exposes multiple positions on the heat plate 30 corresponding to multiple light sources 11, a large opening 21 can be made that covers all the parts of the heat plate 30 where heat from the light sources 11 is easily transferred, allowing for smooth air inflow, etc., and improving heat dissipation.

[0035] Furthermore, as shown in Figure 7, when the opening 21 exposes multiple positions on the heat plate 30 corresponding to each of the multiple light sources 11, the rigidity of the bracket 20 is improved while exposing the parts of the heat plate 30 to which heat from the light sources 11 is easily transferred, thereby reducing the possibility of the bracket 20 being distorted during aiming adjustment.

[0036] Furthermore, the light sources 11 that are arranged at positions offset in the vertical direction are also arranged at positions offset in the horizontal direction, so that they are not arranged side by side in the vertical direction, which reduces the possibility that the upper light source 11 will be affected by heat from the lower light source 11.

[0037] Furthermore, since the second light source array A2 located on the vertically lower side is located closer to the inside of the vehicle than the first light source array A1 located on the vertically upper side, the light source 11 can be positioned at an appropriate position according to the vehicle slant shape, and the optical lens sections 41, 42 can also be positioned at appropriate positions according to the slant shape.

[0038] The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and modifications may be made or known technologies may be combined without departing from the spirit of the present invention.

[0039] For example, in this embodiment, the opening 21 is not limited to the one described above, and various shapes are applicable. Furthermore, as shown in Fig. 4, in this embodiment, the numbers of light sources 11 constituting the plurality of light source arrays A1 and A2 are the same, but may be different. Furthermore, for each of the first light source array A1 and the second light source array A2, the horizontal offset between the Mth (M is an integer of 1 to 2 in this embodiment) light sources 11 from the inside of the vehicle is the same as the horizontal offset between the (M+1)th light sources 11 from the inside of the vehicle, but this is not limited to being the same.

[0040] In addition, although the number of light sources 11 is six in this embodiment, the number is not particularly limited to six. Similarly, each of the light source arrays A1 and A2 is not limited to being composed of three light sources 11. Furthermore, the light source arrays A1 and A2 are not limited to two arrays, but may be three or more arrays.

[0041] In addition, in the above embodiment, a headlight provided on the left front of the vehicle has been described as an example of the vehicle lamp 1, but this is not limited to this, and the vehicle lamp 1 may be a headlight provided on the right front, or it may not be a headlight. [Explanation of symbols]

[0042] 1: Vehicle lighting fixtures 10: Substrate 11:Light source 20: Bracket 21: Opening 30: Heat plate 40: Lens material 41, 42: Optical lens section A1,A2:Light source row E: Aiming mechanism

Claims

1. A substrate having a plurality of light sources mounted on one surface, each of which emits light in one direction; a bracket attached to a rear surface of the substrate, which is the opposite surface of the one surface, and having an aiming mechanism; a heat plate disposed between the substrate and the bracket and having higher heat dissipation properties than the substrate and the bracket; the bracket has an opening that exposes a portion of the heat plate from a rear side of the bracket, The openings collectively expose a plurality of positions on the heat plate corresponding to the plurality of light sources. A vehicle lamp characterized by:

2. A substrate having a plurality of light sources mounted on one surface, each of which emits light in one direction; a bracket attached to a rear surface of the substrate, which is the opposite surface of the one surface, and having an aiming mechanism; a heat plate disposed between the substrate and the bracket and having higher heat dissipation properties than the substrate and the bracket; the bracket has an opening that exposes a portion of the heat plate from a rear side of the bracket, The openings expose a plurality of positions on the heat plate corresponding to the plurality of light sources, respectively. A vehicle lamp characterized by:

3. The plurality of light sources are each provided at a position vertically offset from at least one of the other light sources, The light sources provided at positions offset in the vertical direction are also provided at positions offset in the horizontal direction.

2. A vehicle lamp according to claim 1.

4. a lens member provided in a light emission direction of the light source and having a plurality of optical lens portions; The plurality of light sources are configured in a plurality of light source rows, each row including two or more light sources arranged in the left-right direction, and shifted in the vertical direction; the plurality of optical lens units are arranged to cover the respective light source rows for each row, The light source array positioned on the vertically lower side is positioned closer to the vehicle interior than the light source array positioned on the vertically upper side.

4. A vehicle lamp according to claim 3.

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