Lamp for vehicle

Abstract

To provide a lamp for a vehicle which can suppress the generation of harmful light and spectroscopy.SOLUTION: A lamp for a vehicle comprises: a plurality of light sources which are arranged in right and left directions in on-vehicle states, and whose light emitting faces are arranged toward a bottom; reflectors in which a plurality of reflection parts which are arranged below the plurality of light sources, and reflect light from the plurality of light sources toward a front of the vehicle are arranged in the right and left directions; and a projection lens which emits the light reflected by the plurality of reflection parts to the front of the vehicle, and in which a plurality of lens parts forming reflection patterns are arranged in the right and left directions. In the projection lens, light emission faces of the plurality of lens parts are formed so as to be continued in the right and left directions, and light incident faces of the plurality of lens parts have light diffusion parts at least at a part of a portion to which the light from the plurality of light sources is directly radiated.SELECTED DRAWING: Figure 8

Description

[Technical field]

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

[0002] 2. Description of the Related Art Vehicle lamps that form an ADB pattern in front of a vehicle are known (see, for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-3832 A 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, a plurality of light sources, a reflector having a reflective surface provided for each light source to reflect light from each light source to the front of the vehicle, and a projection lens that emits the light reflected by each reflective surface. In such a vehicle lamp, it is required to suppress the generation of harmful light and light dispersion.

[0005] The present invention has been made in view of the above, and has an object to provide a vehicle lamp capable of suppressing the generation of harmful light and splitting light. [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 downward; a reflector arranged below the plurality of light sources, with a plurality of reflective sections arranged in the left-right direction that reflect light from the plurality of light sources forward of the vehicle; and a projection lens with a plurality of lens sections arranged in the left-right direction that emits the light reflected by the plurality of reflective sections forward of the vehicle to form an illumination pattern, wherein in the projection lens, the exit surfaces of the plurality of lens sections are formed so as to be continuous in the left-right direction, and the entrance surfaces of the plurality of lens sections have a light diffusion section in at least a portion of the area where light from the plurality of light sources is directly irradiated. Effect of the Invention

[0007] According to the present invention, it is possible to provide a vehicle lamp capable of suppressing the generation of harmful light and dispersion. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view showing an example of a vehicle lamp according to the present embodiment. [Diagram 2] FIG. 2 is a diagram showing an example of the configuration of a vehicle lamp as viewed from the front side (front). [Diagram 3] FIG. 3 is a diagram showing an example of the configuration of a vehicle lamp as viewed from the front side (front). [Figure 4] FIG. 4 is a diagram showing a configuration along the cross section AA in FIG. [Diagram 5] FIG. 5 is a perspective view showing an example of a vehicle lamp. [Figure 6] FIG. 6 is a diagram showing an example of a projection lens. [Figure 7] FIG. 7 is a diagram showing an example of a projection lens. [Figure 8] FIG. 8 is a vertical cross-sectional view showing an example of a vehicle lamp. [Figure 9] FIG. 9 is a diagram showing an example of an illumination pattern by a vehicle lamp. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a vehicle lamp according to the present invention will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. Also, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same. 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 in a state in which the vehicle lamp is attached to the vehicle, and indicate directions when looking forward while sitting in the driver's seat. Note that in this embodiment, the up and down direction is parallel to the vertical direction, and the left and right direction is horizontal.

[0010] Fig. 1 is a plan view showing an example of a vehicular lamp 100 according to this embodiment. Figs. 2 and 3 are diagrams showing an example of the configuration of the vehicular lamp 100 as viewed from the front side (forward). Fig. 3 shows a state in which the projection lens 30 is omitted in Fig. 2. Fig. 4 is a diagram showing a configuration along the AA cross section in Fig. 2. Fig. 5 is a perspective view showing an example of the vehicular lamp 100. Fig. 5 shows the vehicular lamp 100 as viewed from the rear and above.

[0011] The vehicular lamp 100 shown in Figs. 1 to 5 is used as a headlamp of a vehicle. The vehicular lamp 100 is attached to the left or right front of a vehicle, for example. The following description will be given taking as an example the vehicular lamp 100 mounted on the right front side of a 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 the vehicular lamp attached to the left front side of a vehicle can be configured symmetrically with respect to the vehicular lamp 100.

[0012] As shown in FIG. 1, the vehicle lamp 100 has a light source 10, a reflector 20, a projection lens 30, and a heat dissipation member 40. The vehicle lamp 100 forms an irradiation pattern in front of the vehicle. The vehicle lamp 100 has a so-called one-sided light distribution configuration. That is, the vehicle lamp 100 forms the right side of the ADB pattern as an irradiation pattern. The ADB pattern is formed by combining a vehicle lamp attached to the front right side of the vehicle and a vehicle lamp attached to the front left side of the vehicle. In this case, the vehicle lamp on the front right side of the vehicle forms the ADB pattern from the center to the right side in front of the vehicle, and the vehicle lamp on the front left side of the vehicle forms the ADB pattern from the center to the left side in front of the vehicle.

[0013] The light source 10 is a semiconductor-type light source such as an LED. A plurality of light sources 10 are provided in the left-right direction. 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 faces downward, for example, and is disposed 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. A circuit or the like for supplying power, electrical signals, etc. to the light source 10 is formed on the substrate 12.

[0014] The reflector 20 has a reflecting portion 21 and a dummy reflecting portion 22. The reflecting portion 21 is provided, for example, for each light source 10. The reflecting portions 21 are arranged side by side in the left-right direction corresponding to the respective light sources 10.

[0015] The dummy reflecting portion 22 reflects the light from the light source 10 in a direction other than the direction toward the front of the vehicle. The dummy reflecting portion 22 functions as a light-dark boundary forming portion for forming the ADB pattern, and also suppresses harmful light and light dispersion by reflecting the light so as not to enter the lens portion 31.

[0016] The projection lens 30 emits the light reflected by the reflecting portion 21 forward of the vehicle to form an irradiation pattern. The projection lens 30 is formed, for example, in a rectangular shape when viewed from the front (front). The shape of the projection lens 30 when viewed from the front is not limited to a rectangular shape. The projection lens 30 has a shape that is inclined backward from the inside of the vehicle to the outside of the vehicle (see FIG. 1). Also, the projection lens 30 has a shape that is inclined upward from the inside of the vehicle to the outside of the vehicle when viewed from the front (see FIG. 2). 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.

[0017] The lens section 31 of the projection lens 30 arranged at the innermost position of the vehicle is set so as to minimize the inward diffusion of the emitted light. This configuration allows the space in front of the projection lens 30 and on the inner side of the vehicle to be effectively utilized, for example, by arranging other structures in the space, thereby increasing the degree of freedom in layout. The lens section 31 of the projection lens 30 arranged at the outermost position of the vehicle is set so as to minimize the outward diffusion of the emitted light. This configuration allows the space in front of the projection lens 30 and on the outer side of the vehicle to be effectively utilized, for example, by arranging other structures in the space, thereby increasing the degree of freedom in layout.

[0018] Moreover, the reflecting portion 21 has a reflecting surface 21a that is recessed downward from both the left and right sides toward the center. The reflecting portion 21 is provided corresponding to the lens portion 31. Specifically, the reflecting portion 21 is disposed so as to reflect light toward the corresponding lens portion 31 by the reflecting surface 21a.

[0019] The reflecting portion 21 is disposed at a position on the vehicle inner side with respect to the optical axis AX of the corresponding lens portion 31. Therefore, the ADB pattern can be formed so as to irradiate toward the outside of the vehicle in front of the vehicle. In this embodiment, two reflecting portions 21 are provided for one lens portion 31. The two reflecting portions 21 are disposed in a state of being connected to each other on the left and right.

[0020] The dummy reflecting portion 22 has a reflective surface 22a that is recessed downward from both left and right sides toward the center. One dummy reflecting portion 22 is provided for each lens portion 31. The dummy reflecting portion 22 reflects light by the reflective surface 22a so as not to enter the lens portion 31.

[0021] The dummy reflecting portion 22 has a shape in which the rear end 22b faces rearward from the reflecting portion 21 side. With this configuration, the light reflected by the reflecting surface 22a of the dummy reflecting portion 22 is less likely to enter the lens portion 31. The rear end 22b may be linear or curved. The dummy reflecting portion 22 has a knurled portion 22c on the side portion on the outer side of the vehicle. The knurled portion 22c scatters light.

[0022] The partition wall 24 is provided so as to protrude upward from the bottom plate 23. The partition wall 24 is disposed along the front-rear direction between the lens portions 31 adjacent in the left-right direction. The partition wall 24 is formed so that its height in the front-rear direction increases toward the front.

[0023] The outer frame portions 26 are disposed on both left and right ends of the reflector 20. The outer frame portions 26 are formed so as to be bent upward from the bottom plate 23.

[0024] The lens units 31 are connected together. Each lens unit 31 has an incident surface 31a on which light reflected by the reflecting unit 21 is incident. The lens units 31 have continuous, stepless exit surfaces 31b that emit light incident from the incident surfaces 31a. In the projection lens 30, the lens units 31 are formed such that the exit surfaces 31b are connected to each other in the left-right direction. In this embodiment, each exit surface 31b is provided on a single smooth curved surface. The lens units 31 each have a light control unit 31c (see FIG. 5, FIG. 6, FIG. 7, etc.) on the incident surface 31a. The light control unit 31c controls the light distribution of light emitted from the exit surface 31b. The light control unit 31c is provided for each lens unit 31 and is arranged along the left-right direction. Other configurations of the projection lens 30 will be described later.

[0025] The heat dissipation member 40 dissipates heat generated in the light source 10. The heat dissipation member 40 holds the substrate 12 of the light source 10.

[0026] The heat dissipation member 40 is provided with a light shielding portion 45. The light shielding portion 45 is provided so as to protrude downward from above the multiple light sources 10. The light shielding portion 45 blocks a portion of the light directed forward from the multiple light sources 10. The light shielding portion 45 has a light shielding range set so that the light from the multiple light sources 10 does not directly enter the light control portion 31c of the projection lens 30.

[0027] 6 and 7 are diagrams showing an example of the projection lens 30. FIG. 8 is a vertical cross-sectional view showing an example of the vehicle lamp 100. FIG. 6 is a perspective view seen from the upper left rear, and FIG. 7 is a view seen from the rear. FIG. 8 shows a cross-sectional configuration of one lens portion 31 (for example, the lens portion 31 closest to the vehicle inner side) taken along a plane passing through the light source 10, perpendicular to the horizontal plane, and along the front-rear direction. As shown in FIG. 6 to FIG. 8, in the projection lens 30, each of the multiple lens portions 31 has a light diffusion portion 31d on the entrance surface 31a.

[0028] The light diffusion section 31d is provided in at least a part of the incident surface 31a where the light from the light source 10 is directly irradiated. In this embodiment, the light shielding section 45 has a light shielding range α set so that the light from the light source 10 does not directly enter the light control section 31c (see FIG. 8). In this configuration, a part of the light emitted from the light source 10 and passing through the light shielding section 45 reaches a part of the incident surface 31a below the light control section 31c. The light diffusion section 31d can be provided in a part of the incident surface 31a below the light control section 31c. In this embodiment, the lower end of the light control section 31c and the upper end of the light diffusion section 31d are configured to coincide with each other, but the present invention is not limited to this configuration. The lower end of the light control section 31c and the upper end of the light diffusion section 31d may be configured to be separated from each other in the vertical direction.

[0029] The light diffusion section 31d diffuses the light directly irradiated from the light source 10. The light diffusion section 31d can be a curved surface having a curvature different from that of the light control section 31c, for example. As shown in FIG. 8, the upper side of the light control section 31c of the incident surface 31a is not provided with the light diffusion section 31d, and is formed so as to bend backward from the upper end of the light control section 31c. In contrast, the lower side of the light control section 31c of the incident surface 31a is provided with the light diffusion section 31d, and is formed so as to bend backward from the lower end of the light control section 31c according to the shape of the light diffusion section 31d. Note that the light diffusion section 31d may have other shapes, such as a flat shape, as long as it has a shape capable of diffusing light. The light that passes through the light shielding section 45 and reaches the lower side of the light control section 31c is irradiated to the light diffusion section 31d and diffused.

[0030] In this embodiment, the projection lens 30 is formed so as to be inclined upward from the inside to the outside of the vehicle when viewed from the front. As shown in Fig. 7, the light control unit 31c is arranged along the left-right direction. Therefore, the area of ​​the incident surface 31a below the light control unit 31c tapers from the inside to the outside of the vehicle. Therefore, the light diffusion unit 31d arranged below the light control unit 31c is formed so as to taper from the inside to the outside of the vehicle according to the shape of the incident surface 31a.

[0031] Next, the operation of the vehicle lamp 100 configured as described above will be described. By turning on the light source 10 in the vehicle lamp 100, light is emitted from the light emitting surface 11. As shown in FIG. 8, a part of the light L1 emitted from the light emitting surface 11 that is not blocked by the light blocking portion 45 reaches the reflecting surface 21a of the reflecting portion 21. The light L1 that reaches the reflecting surface 21a is reflected forward toward the corresponding lens portion 31. The light L1 that reaches the lens portion 31 is incident on the light control portion 31c of the incident surface 31a and is emitted from the exit surface 31b, forming an ADB pattern in front of the vehicle.

[0032] A part of the light L2 that has passed through the light blocking portion 45 reaches the lens portion 31 beyond the reflecting surface 21a. The light L2 is light that is directly irradiated from the light source 10 to the lower side of the light control portion 31c of the incident surface 31a of the lens portion 31. In this embodiment, the light diffusion portion 31d is provided below the light control portion 31c. Therefore, the light L2 enters the light diffusion portion 31d, is diffused by the light diffusion portion 31d, and is emitted in a direction different from the front of the vehicle (for example, downward, etc.). In this way, the light L2 is prevented from being emitted in the front of the vehicle, and the generation of harmful light and light splitting is suppressed.

[0033] FIG. 9 is a diagram showing an example of an irradiation pattern P by the vehicle lamp 100. In FIG. 9, the line HH indicates a horizontal line, and the line VV indicates a line parallel to the vertical direction (hereinafter, referred to as a vertical line). As shown in FIG. 9, the light L1 emitted from the emission surface 31b of the projection lens 30 forms an irradiation pattern P in front of the vehicle. The irradiation pattern P is arranged in a state in which patterns P1 to P6 corresponding to the individual light sources 10 are arranged side by side with some overlapping in the left-right direction. In FIG. 4, the symbols of the light sources 10 corresponding to the patterns P1, P2, P3, P4, P5, and P6 are shown as S1, S2, S3, S4, S5, and S6, respectively. The vehicle lamp 100 according to this embodiment has a so-called one-sided light distribution. Therefore, the irradiation pattern P corresponds to the right part of the ADB pattern. The ADB pattern is formed by combining with the irradiation pattern of the vehicle lamp arranged in the front left part of the vehicle.

[0034] As described above, the vehicle lamp 100 according to this embodiment includes a plurality of light sources 10 arranged in the left-right direction when mounted on a vehicle, with the light-emitting surface 11 facing downward, a reflector 20 arranged below the plurality of light sources 10 and having a plurality of reflective portions 21 arranged in the left-right direction that reflect light from the plurality of light sources 10 forward of the vehicle, and a projection lens 30 having a plurality of lens portions 31 arranged in the left-right direction that emit the light reflected by the plurality of reflective portions 21 forward of the vehicle to form an irradiation pattern P, in which the projection lens 30 has exit surfaces 31b of the plurality of lens portions 31 formed so as to be connected in the left-right direction, and the entrance surfaces 31a of the plurality of lens portions 31 have a light diffusion portion 31d in at least a portion of the area where the light from the plurality of light sources 10 is directly irradiated.

[0035] According to this configuration, the entrance surface 31a of the lens units 31 has the light diffusion portion 31d in at least a part of the portion directly irradiated with the light from the light sources 10, so that when the light from the light source 10 is directly irradiated to the entrance surface 31a of the lens units 31, the light can be diffused in a direction other than the direction toward the front of the vehicle. Therefore, it is possible to prevent the light from being emitted from the exit surface 31b in an unintended manner toward the front of the vehicle, and thus it is possible to prevent the generation of harmful light and light scattering.

[0036] In the vehicle lamp 100 according to this embodiment, the entrance surface 31a has a light control portion 31c that controls the distribution of light from the reflector 20, and the light diffusion portion 31d is formed outside the light control portion 31c.

[0037] According to this configuration, by disposing the light diffusion section 31d outside the light control section 31c, it is possible to suppress the generation of harmful light and light dispersion while ensuring the light control section 31c.

[0038] The vehicle lamp 100 of this embodiment further includes a shading portion 45 that is arranged in front of the multiple light sources 10 and blocks a portion of the light traveling forward from the multiple light sources 10 so that the portion does not directly enter the light control portion 31c, the shading portion 45 being formed to extend downward from above the multiple light sources 10, and the light diffusion portion 31d being arranged below the light control portion 31c.

[0039] According to this configuration, it is possible to prevent light that passes through the light blocking portion 45 and is directly irradiated downward of the light control portion 31c from being emitted in an unintended manner in the direction forward of the vehicle from the emission surface 31b.

[0040] In the vehicle lamp 100 according to this embodiment, the projection lens 30 is formed so as to be inclined upward from the inside of the vehicle to the outside of the vehicle when viewed from the front.

[0041] According to this configuration, the projection lens 30 is formed so as to tilt upward from the inside of the vehicle to the outside of the vehicle when viewed from the front, and by preventing light from being emitted in an unintended manner in front of the vehicle from the exit surface 31b, it is possible to suppress the generation of harmful light and splitting of light while maintaining design.

[0042] In the vehicle lamp 100 according to this embodiment, the light diffusion portion 31d is disposed at the lower end of the lens portion 31, and is formed so as to taper in the vertical direction from the inside of the vehicle to the outside of the vehicle.

[0043] According to this configuration, the light diffusion portion 31d is formed in the shape of the projection lens 30 at the lower end of the lens portion 31, so that the light directly irradiated from the light source 10 to the incident surface 31a of the lens portion 31 can be diffused more reliably.

[0044] The technical scope of the present invention is not limited to the above embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the light diffusion unit 31d is disposed below the light control unit 31c, but the present invention is not limited to this configuration. The light diffusion unit 31d may be disposed above the light control unit 31c. [Explanation of symbols]

[0045] AX...optical axis, L1, L2...light beam, P...irradiation pattern, 10...light source, 11...light emitting surface, 12...substrate, 20...reflector, 21...reflective portion, 21a, 22a...reflective surface, 22...dummy reflective portion, 22b...rear end portion, 22c...knurled portion, 23...bottom plate, 24...partition wall, 26...outer frame portion, 30...projection lens, 31...lens portion, 31a...entrance surface, 31b...exit surface, 31c...light control portion, 31d...light diffusion portion, 40...heat dissipation member, 45...light shielding portion, 100...vehicle lamp

Claims

1. A plurality of light sources are arranged in the left and right directions when the light source is mounted on a vehicle, with light emitting surfaces facing downward; A reflector is disposed below the plurality of light sources, and includes a plurality of reflecting portions disposed in the left-right direction to reflect light from the plurality of light sources forward of the vehicle; a projection lens including a plurality of lens portions arranged in the left-right direction, the lens portions forming an irradiation pattern by emitting the light reflected by the plurality of reflecting portions forward of the vehicle; Equipped with In the projection lens, The emission surfaces of the plurality of lens portions are formed so as to be continuous in the left-right direction, The entrance surfaces of the lens portions have a light diffusion portion at least in a part where the light from the light sources is directly irradiated. Vehicle lighting fixtures.

2. the light incidence surface has a light control unit that controls a light distribution of the light from the reflector, The light diffusion portion is formed outside the light control portion.

2. A vehicle lamp according to claim 1.

3. a light shielding unit arranged in front of the plurality of light sources and configured to shield a portion of the light from the plurality of light sources so that the portion of the light traveling forward from the plurality of light sources is not directly incident on the light control unit; The light blocking portion is formed so as to extend downward from above the plurality of light sources, The light diffusion unit is disposed below the light control unit.

3. A vehicle lamp according to claim 2.

4. The projection lens is formed so as to be inclined upward from the inside of the vehicle to the outside of the vehicle when viewed from the front.

2. A vehicle lamp according to claim 1.

5. The light diffusion portion is disposed at a lower end of the lens portion and is formed so as to taper in the vertical direction from the inside of the vehicle to the outside of the vehicle.

5. A vehicle lamp according to claim 4.

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