Vehicle lamp

Abstract

The present application provides a vehicle lamp capable of reducing the number of components and the assembly man-hours. A vehicle lamp (1) includes: a high beam light source group (20); a low beam light source group (30); a high beam lens (51) for transmitting light from the high beam light source group (20) to the outside; a low beam lens (52) for transmitting light from the low beam light source group (30) to the outside; a circuit board (10) on which the high beam light source group (20) and the low beam light source group (30) are mounted; and a reflector (40) for guiding light from the low beam light source group (30) to the low beam lens (52), wherein the circuit board (10) is inclined in the front-rear direction and the up-down direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle lamp. BACKGROUND

[0002] A vehicle lamp in which a high beam light source and a low beam light source are disposed on the same substrate in the vertical direction is proposed (see, for example, Patent Literature 1).

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: European Patent Application Publication No. 3232118 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] Here, in the vehicle lamp described in Patent Literature 1, the high beam light source and the low beam light source are disposed on the same substrate, and light from both the high beam light source and the low beam light source is made to pass through a single focal point and be emitted through the same lens. Therefore, due to the presence of a lens cover for the low beam light source disposed in the vicinity of the single focal point, a dark area is easily formed at the boundary between the high beam light distribution and the low beam light distribution. Also, since the same lens is used, it is necessary to dispose the high beam light source and the low beam light source with respect to the single focal point, and due to the problem of the space for disposition, it is difficult to appropriately form the structure for the high beam light, and thus it is difficult to improve the brightness of the high beam light.

[0008] In addition to this, in recent years, a system in which a part of the high beam light is shielded in a manner so as to avoid irradiation to an oncoming vehicle or a preceding vehicle has been adopted for vehicle lamps. In this system, irradiation to an oncoming vehicle or a preceding vehicle is avoided, for example, by extinguishing a part of a plurality of high beam light sources, and the like, and with respect to this control, a direct type device in which the high beam light source directly enters a high beam lens is preferable, and thus is preferred. In contrast to this, with respect to the low beam light, a reflector having a concave reflection surface based on a rotation ellipsoid is preferable in order to diffuse light, and the like. Thus, the high beam light source is preferably opposed to the lens in a manner so as to be able to directly enter, and the low beam light source is preferably made to pass through the reflector, and in such a case, it is not simple to mount the high beam light source and the low beam light source on the same substrate as in the vehicle lamp described in Patent Literature 1.

[0009] As described above, mounting the high beam light source and the low beam light source on the same substrate is not simple, and even if they are mounted on the same substrate, problems arise in terms of the dark area and the brightness of the high beam light. As a result, it is difficult to mount the high beam light source and the low beam light source on the same substrate while achieving a reduction in the number of components and a reduction in assembly man-hours.

[0010] The present application has been achieved in order to solve such a conventional problem, and has an object to provide a vehicle lamp capable of reducing the number of components and reducing assembly man-hours.

[0011] Means for solving the problem

[0012] The vehicle lamp of the present application includes a high beam light source for forming a high beam distribution pattern, a low beam light source for forming a low beam distribution pattern, a high beam lens for transmitting light from the high beam light source to the outside, a low beam lens for transmitting light from the low beam light source to the outside, a circuit substrate on which the high beam light source and the low beam light source are mounted, and a reflector for guiding light from the low beam light source to the low beam lens, wherein the circuit substrate is inclined in a front-rear direction and a vertical direction orthogonal to the front-rear direction.

[0013] Effects of the present application are as follows.

[0014] According to the present application, a vehicle lamp capable of reducing the number of components and reducing assembly man-hours can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a main part perspective view of the vehicle lamp of the present embodiment.

[0016] Figure 2 is a front view of the first reflector shown in Figure 1

[0017] Figure 3 is a schematic view showing the case where light is emitted from the high light source group shown in Figure 1

[0018] Figure 4 is a schematic view showing the case where light is emitted from the low light source group shown in Figure 1 DETAILED DESCRIPTION

[0019] Hereinafter, the present application will be described in accordance with a preferred embodiment. Furthermore, the present application is not limited to the embodiment shown below, and can be appropriately changed within the scope of the gist of the present application. Also, in the embodiment shown below, there are parts where the illustration and description of the structure are omitted, but it is self-evident that, with respect to the technical details of the omitted structure, known or well-known technologies are appropriately applied within the scope where the content described below does not contradict.

[0020] ​​​Figure 1 is a main part perspective view showing a vehicle lamp of the embodiment. Figure 1 The vehicle lamp 1 shown is, for example, a headlamp provided at a front portion of a vehicle, and has a circuit board 10, a high beam light source group (high beam light source) 20, a low beam light source group (low beam light source) 30, a reflector 40, and a lens 50. Each element including the circuit board 10, the high beam light source group 20, the low beam light source group 30, and the reflector 40 is housed, for example, in a lamp chamber formed by the lens 50 and a housing not shown.

[0021] The circuit board 10 is a board on which a driving circuit for controlling light emission and a circuit for supplying electric power are mounted. The high beam light source group 20, the low beam light source group 30, and the plurality of reflectors 40 are mounted on this circuit board 10.

[0022] The high beam light source group 20 is a light source for forming a high beam distribution pattern, and is composed of a light source array in which a plurality of semiconductor light sources are arranged in the horizontal direction. This high beam light source group 20 is, for example, a direct type light source group that emits light toward the lens 50 without passing through a reflector.

[0023] The low beam light source group 30 is composed of, for example, a plurality of (two) semiconductor light sources 31, 32, and is arranged on the same circuit board 10 in a state of being arranged laterally to the high beam light source group 20. That is, the low beam light source group 30 and the high beam light source group 20 are arranged at the same height in the vertical direction (vertical direction) of the circuit board 10. Figure 1

[0024] A first reflector 41 is provided above the first light source 31 of the low beam light source group 30, and a second reflector 42 is provided above the second light source 32. Each of the reflectors 41, 42 guides light from the light sources 31, 32 to the low beam lens 52 described below, and light from the first light source 31 is reflected by the first reflector 41 to form a spotlight distribution pattern (one of the low beam distribution patterns) that is multiplexed in a diffused distribution pattern described below. Also, light from the second light source 32 is reflected by the second reflector 42 to form, for example, a diffused distribution pattern (one of the low beam distribution patterns) having a larger irradiation range.

[0025] The plurality of reflectors 40 are composed of the first reflector 41 and the second reflector 42. The first reflector 41 and the second reflector 42 each have a concave reflection surface based on a rotation ellipsoid on an inner side surface, and the open side of the rotation ellipsoid is arranged toward the lens 50 side.

[0026] ​Lens 50 is a light-transmitting optical component for receiving light from the strong light source group 20 and light from the weak light source group 30 and projecting it outwards. Lens 50 includes a high beam lens 51 for transmitting light from the strong light source group 20 and projecting it outwards, and a low beam lens 52 for transmitting light from the weak light source group 30 and projecting it outwards. Lenses 51 and 52 are integrated into one component.

[0027] Furthermore, the lens 50 is configured such that the near-beam lens 52 is thinner than the far-beam lens 51. Here, in this embodiment, light from the strong light source group 20 directly enters the far-beam lens 51, while light from the weak light source group 30 enters the near-beam lens 52 via multiple reflectors 40. Therefore, the lens 50 is made thinner and formed into an appropriate shape on the near-beam side, where the distance to the focal point is easily increased by passing through the reflectors 40.

[0028] Furthermore, in relation to the two reflectors 41 and 42 provided relative to the weak light source group 30, the near beam lens 52 is configured to have a wider width than the far beam lens 51.

[0029] Furthermore, in the vehicle lamp 1 of this embodiment, when the optical axis directions of the high beam lens 51 and the low beam lens 52 are set to the front-rear direction, the circuit board 10 is fixedly disposed in the lamp housing with an inclination in both the front-rear direction and the up-down direction orthogonal to the front-rear direction. Specifically, the circuit board 10 is in a state of inclination of 30° or more and 60° or less relative to the front-rear direction. In addition, the circuit board 10 is disposed along the vehicle width direction (or the arrangement direction of the high beam lens 51 and the low beam lens 52), but is not limited to this, and may also be inclination relative to the vehicle width direction (or the above-mentioned arrangement direction).

[0030] In this way, the circuit board 10 is tilted in both the forward and backward and up and down directions, so the surface direction is in the middle direction relative to both the forward and backward and up and down directions. As a result, the strong light source group 20 can be set into a near-direct type, and the weak light source group 30 can also emit light through the reflector 40.

[0031] Figure 2 yes Figure 1 The front view of the first reflector 41 is shown. Figure 2 As shown, the first reflector 41 is configured such that its rear end E is located at or near the focal point of the near-beam lens 52. Furthermore, the shape of the rear end E of the first reflector 41 differs from that of the second reflector 42, forming a stepped shape for forming a cutoff line in the light distribution pattern. Specifically, the first reflector 41 is configured such that the shape of its rear end E has an inclined portion 41a corresponding to the cutoff line, a first horizontal portion 41b extending continuously in the horizontal direction from the inclined portion 41a, and a second horizontal portion 41c.

[0032] By being provided with such a rear end shape, a cutoff line is formed when light from the first light source 31 is reflected by the first reflector 41, and since there is no shade for forming a cutoff line, an appropriate distribution of light pattern can be formed.

[0033] In addition, in the present embodiment, the focal point of the low beam lens 52 is located at the rear end E of the first reflector 41, and thus it is also known that the optical axis of the high beam lens 51 is located at a position lower than the optical axis of the low beam lens 52 (both optical axes are parallel). Thus, for example, the high beam can appropriately emit light from the high beam lens 51, and the low beam can also appropriately emit light from the low beam lens 52. That is, if the optical axes of both are at the same height, there is a concern that the position of the optical axis of at least one of the beams is not appropriate, but in the present embodiment, the optical axis of the high beam lens 51 is provided to be lower, and is configured to be able to form an appropriate distribution of light pattern.

[0034] Next, the effects of the vehicle lamp 1 of the present embodiment will be described. Figure 3 is a schematic view showing a case where light is emitted from the high light source group 20, Figure 1 is a schematic view showing a case where light is emitted from the high light source group 20, Figure 4 is a schematic view showing a case where light is emitted from the low light source group 30. Figure 1

[0035] First, as shown in Figure 3 if each light source constituting the high light source group 20 is turned on, light from each light source directly reaches the high beam lens 51, is refracted in the high beam lens 51, and then is emitted to the outside. In the case where a region where light is desired to be partially blocked, such as an oncoming vehicle, a preceding vehicle, or the like, is generated, for example, a part of the light sources of the high light source group 20 are turned off.

[0036] And, as shown in Figure 4 if each light source 31, 32 constituting the low light source group 30 is turned on, light from each light source 31, 32 is reflected by each reflector 41, 42, then reaches the low beam lens 52, is refracted in the low beam lens 52, and then is emitted to the outside. In particular, a cutoff line is formed by reflecting light from the first light source 31 by the first reflector 41, and is emitted to the outside without passing through a shade.

[0037] In this way, in the vehicle lamp 1 of the present embodiment, even if the high light source group 20 and the low light source group 30 are mounted on the same circuit board 10, light is emitted by each lens 51, 52. That is, an appropriate distribution of light pattern is easily formed by each lens 51, 52. Furthermore, it is not necessary to provide the high light source group 20 and the low light source group 30 with respect to a single focal point as in the case of using a common lens, and thus there is no problem of setting space, and it is also not difficult to improve the brightness of the high beam. ​

[0038] And, since the vehicle lamp 1 of the present embodiment does not have a lamp cover, the light beams of the high light source group 20 and the low light source group 30 are not blocked by the lamp cover, and the light beam utilization efficiency can be improved.

[0039] In addition, since the circuit board 10 is inclined in the front-rear direction and the up-down direction, the high light source group 20 emits light toward the high beam lens 51 as a direct type, and the low light source group 30 emits light after being reflected by the reflector 40.

[0040] Thus, according to the vehicle lamp 1 of the present embodiment, the circuit board 10 on which the high light source group 20 and the low light source group 30 are mounted, and the high beam lens 51 and the low beam lens 52 are provided. Therefore, even if the high light source group 20 and the low light source group 30 are mounted on the same circuit board 10, an appropriate light distribution pattern can be easily formed by each lens 51, 52. Also, since each lens 51, 52 is provided, the high light source group 20 and the low light source group 30 do not need to be arranged with respect to a single focal point when a common lens is used, so that even if a lamp cover is provided, the high beam is not blocked by the lamp cover, and a dark area is difficult to form. In addition, the structure of the high beam and the structure of the low beam are not concentrated on a single focal point, and the brightness of the high beam can be improved more easily.

[0041] In addition, since the circuit board 10 is inclined in both the front-rear direction and the up-down direction, the surface direction becomes a direction intermediate with respect to both the front-rear direction and the up-down direction. Thus, the high light source group 20 can be configured in a form close to a direct type, and the low light source group 30 can also emit light via the reflector 40.

[0042] In summary, mounting the high light source group 20 and the low light source group 30 on the same circuit board 10 solves various problems, and thus a vehicle lamp 1 in which the high light source group 20 and the low light source group 30 are mounted on the same circuit board 10 can be provided, and the number of components can be reduced, and the assembly man-hours can be reduced.

[0043] Also, since the rear end of the first reflector 41 located at or near the focal point is shaped to correspond to the cutoff line, even if a lamp cover is not needed, a low beam light distribution pattern having a cutoff line can be formed.

[0044] Also, since the low beam lens 52 is formed thinner than the high beam lens 51, the lens on the low beam side, which has a distance to the focal point by having the reflector 40, can be made thin, and a low beam lens 52 having an appropriate wall thickness can be formed.

[0045] Also, since the circuit board 10 becomes a state inclined by 30° or more and 60° or less with respect to the front-rear direction, it is possible to prevent a situation in which light from either of the light source groups 20, 30 is significantly difficult to emit, as in the case where the inclination with respect to the up-down direction is less than 30° or exceeds 60°.

[0046] Also, since the high beam lens 51 and the low beam lens 52 are formed in one piece, the parts are shared, and it is possible to further achieve reduction in the number of parts and reduction in assembly man-hours.

[0047] In addition, since the high light source group 20 and the low light source group 30 are arranged at the same height in the vertical direction with the circuit board 10, and the optical axis of the high beam lens 51 is located at a position lower than the optical axis of the low beam lens 52, it is possible to form an appropriate light distribution pattern.

[0048] The present application has been described based on the embodiments, but the present application is not limited to the above-described embodiments, and can be changed or combined with known or well-known technologies without departing from the gist of the present application.

[0049] For example, in the present embodiment, the high beam lens 51 and the low beam lens 52 of the lens 50 are formed in one piece, but are not particularly limited thereto, and can be composed of separate parts.

[0050] In addition, in the above-described embodiment, the rear end E of the first reflector 41 becomes a shape corresponding to the cutoff line, and thus becomes a structure without a lamp cover, but is not particularly limited thereto, and can have a lamp cover.

[0051] Also, in the present embodiment, the description has been made on the premise of a headlamp, but is not limited thereto, and can be applied to a vehicle lamp that irradiates another direction as long as it can be applied.

[0052] In addition, in the present embodiment, the low light source group 30 and the high light source group 20 are arranged at the same height, but are not particularly limited thereto, and the height positions can be staggered. In this case, it is needless to say that it is possible to become a structure in which the optical axis of the high beam lens 51 is located at a position higher than the optical axis of the low beam lens 52 or at the same height or the like without being located below.

[0053] Explanation of Symbols

[0054] 1 - vehicle lamp, 10 - circuit board, 20 - high light source group (high beam light source), 30 - low light source group (low beam light source), 40 - reflector, 51 - high beam lens, 52 - low beam lens, E - rear end.

Claims

1. A vehicle lamp, comprising: A long-beam light source, used to form a long-beam light distribution pattern; A near-beam light source, used to form a near-beam light distribution pattern; A lens for a high beam, which is used to transmit light from the aforementioned high beam source and project it outwards; A near-beam lens, used to transmit light from the aforementioned near-beam light source so that it is emitted to the outside; A circuit board, which simultaneously mounts the aforementioned high-beam light source and the aforementioned low-beam light source; and A reflector that guides the light emitted from the aforementioned near-beam light source to the aforementioned near-beam lens. When the optical axis direction of the aforementioned high beam lens and the aforementioned low beam lens is set to the front-back direction, the aforementioned circuit board is tilted in the front-back direction and in the up-down direction orthogonal to the aforementioned front-back direction. The features of the vehicle's lights are as follows: The aforementioned high-beam light source and the aforementioned low-beam light source are arranged at the same height in the vertical direction, as if they were disposed on the aforementioned circuit board. The optical axis of the aforementioned high-beam lens is located below the optical axis of the aforementioned low-beam lens.

2. The vehicle lighting fixture according to claim 1, characterized in that, The rear end of the aforementioned reflector is located at or near the focal point of the aforementioned near beam lens, and the rear end is configured in a shape corresponding to the aforementioned cutoff line in order to form a near beam light distribution pattern with a cutoff line.

3. The vehicle lighting fixture according to claim 1, characterized in that, The aforementioned near-beam lens is formed to be thinner in the front-to-back direction than the aforementioned far-beam lens.

4. The vehicle lighting fixture according to claim 1, characterized in that, The aforementioned circuit board is tilted at an angle of 30° or more but less than 60° relative to the aforementioned front-back direction.

5. The vehicle lighting fixture according to claim 1, characterized in that, The aforementioned high beam lens and the aforementioned low beam lens are integrated into one component.

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