Vehicle headlamp and vehicle

Abstract

The utility model provides a vehicle headlamp and a vehicle, the vehicle headlamp comprises a light-emitting unit and a light guide unit composed of a plurality of light guide plates, the light guide unit at least comprises a near-end light guide plate and a far-end light guide plate which are arranged along a preset queue direction, the near-end light guide plate comprises a light incident surface arranged opposite to the light-emitting unit, and the far-end light guide plate comprises a light incident surface arranged opposite to the light-emitting unit. A near-end reflecting surface and a first emergent surface with a first light distribution texture are respectively formed on two opposite sides of the near-end light guide plate, the far-end light guide plate comprises a far-end emergent surface with a second light distribution texture, and the near-end reflecting surface, the first emergent surface and the far-end emergent surface are sequentially arranged along a preset queue direction.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lighting technology, especially to a vehicle headlamp and vehicle. BACKGROUND

[0002] The vehicle headlamp with LED lamp as light source is increasingly popular, in order to obtain more uniform lighting light effect, the existing vehicle headlamp also carries the light guide piece in the form of rod, the light guide piece is also called thick wall optical component, its main function is to generate light through the reflection effect along the specific direction to the exit surface of light guide piece, and the diffused light is shot from the exit surface through the refraction effect, the area of exit surface is larger than light source, and the brightness distribution of exit surface is more uniform. The light guide piece currently adopted has larger size, resulting in that the volume of vehicle headlamp is huge and cumbersome. SUMMARY

[0003] Therefore, the utility model provides a vehicle headlamp and vehicle with smaller volume and more lightness.

[0004] The utility model discloses a vehicle headlamp includes light emitting unit and the light guide unit formed by multiple light guide plates, and the light guide unit at least includes proximal end light guide plate and distal end light guide plate arranged along the preset queue direction, the proximal end light guide plate includes the light entrance surface opposite the light emitting unit, and the opposite sides of the proximal end light guide plate form the proximal end reflection surface and the first exit surface with the first light distribution texture respectively, the distal end light guide plate includes the distal end exit surface with the second light distribution texture, and the proximal end reflection surface, the first exit surface and the distal end exit surface are sequentially arranged along the preset queue direction.

[0005] In some embodiments, the light entrance surface is located between the proximal end reflection surface and the first exit surface.

[0006] In some embodiments, the light entrance surface is formed on the outer side of the proximal end light guide plate, or

[0007] The proximal end light guide plate further includes a back light surface opposite the light entrance surface, the light entrance surface is provided with an avoidance hole extending to the back light surface, the avoidance hole accommodates at least part of the light emitting unit, and the light entrance surface includes an inner wall of the avoidance hole.

[0008] In some embodiments, the surface of the proximal end reflection surface is covered with a sheet structure with a light reflecting function, and the sheet structure is used to reflect the light from the light emitting unit to the first exit surface and the distal end light guide plate.

[0009] In some embodiments, the sheet structure is a metal plating layer provided on the surface of the proximal end reflection surface.

[0010] In some embodiments, at least the proximal end light guide plate and the distal end light guide plate in the multiple light guide plates are arranged in parallel with each other.

[0011] In some embodiments, all the light guide plates are arranged in parallel with each other.

[0012] In some embodiments, the vehicle lamp further comprises a light distribution sleeve, the light distribution sleeve is sleeved on the distal light guide plate and cooperates with the side edge of the distal light guide plate, and the light distribution sleeve is a non-light-transmitting structure.

[0013] In some embodiments, the light distribution sleeve comprises a sleeve shell and an inner flange, the sleeve shell has a sleeving opening, the inner flange is bent and connected to one end of the sleeve shell away from the proximal light guide plate and extends to the center of the sleeving opening, a limiting step is formed between the inner wall of the sleeve shell and the side of the inner flange close to the proximal light guide plate, and the side edge of the distal light guide plate cooperates with the limiting step.

[0014] In some embodiments, the distal exit surface is formed at one end of the distal light guide plate away from the proximal light guide plate; or,

[0015] The first light distribution texture and the second light distribution texture both comprise a plurality of granular protrusions; or,

[0016] The first light distribution texture comprises a plurality of first strip-shaped protrusions arranged in parallel, the second light distribution texture comprises a plurality of second strip-shaped protrusions arranged in parallel, and the first strip-shaped protrusions and the second strip-shaped protrusions extend in different directions, respectively.

[0017] The vehicle of the utility model comprises the vehicle lamp.

[0018] The vehicle lamp of the utility model is provided with a light guide unit composed of at least two light guide plates, and the light guide unit replaces the light guide piece in the existing vehicle lamp, the light rays are refracted multiple times by the plurality of light guide plates, the light guide unit has the light ray diffusion and homogenization functions not inferior to the existing light guide piece, the size of the light guide unit in the preset queue direction is significantly shortened compared with the rod-shaped light guide piece, and the light guide unit is more light and easy compared with the light guide piece, so that the vehicle lamp of the utility model is smaller in size and lighter in weight, which helps to reduce the curb weight of the vehicle and save more body space for the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The figure is a structural schematic view of the vehicle lamp of one embodiment of the utility model;

[0020] Figure 2 The figure is a partial structural schematic view of the vehicle lamp of one embodiment of the utility model.

[0021] 10, light emitting unit; 11, LED lamp; 12, circuit board; 20, light guide unit; 21, proximal light guide plate; 211, light inlet surface; 212, proximal reflection surface; 213, first light outlet surface; 214, back surface; 22, distal light guide plate; 221, distal light outlet surface; 23, light beam cover; 231, cover shell; 232, cover opening; 233, inner flange; 30, lamp frame; 40, lamp body; 50, lamp shade. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments of the present application, and is not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0024] The present application provides a vehicle lamp, and also provides a vehicle carrying the vehicle lamp. The vehicle lamp can be used as a headlamp, a tail lamp, a door welcome lamp or a rear high brake warning lamp of the vehicle, and the present application does not limit the installation position and specific purpose of the vehicle lamp on the vehicle.

[0025] Referring to Figure 1 The vehicle lamp of the present application comprises a lamp body 40, a light emitting unit 10 and a light guide unit 20. The lamp body 40 is installed on the vehicle body and serves as the installation matrix of the light emitting unit 10 and the light guide unit 20. The light emitting unit 10 comprises a circuit board 12 connected to the power supply device of the vehicle and a light source arranged on the circuit board 12. The light guide unit 20 is composed of a plurality of light guide plates arranged in a predetermined queue direction. The light guide plates at least comprise a proximal light guide plate 21 and a distal light guide plate 22. The proximal light guide plate 21 and the distal light guide plate 22 are respectively located at the first position and the last position in the light guide plate arrangement queue.

[0026] Referring to Figure 2The proximal light guide plate 21 comprises an incident light surface 211 arranged opposite to the light emitting unit 10, and the two opposite sides of the proximal light guide plate 21 are formed with a proximal reflection surface 212 and a first exit surface 213 with a first light distribution texture, respectively; the distal light guide plate 22 comprises a distal exit surface 221 with a second light distribution texture; and the proximal reflection surface 212, the first exit surface 213 and the distal exit surface 221 are sequentially arranged along a preset queue direction. The first light distribution texture and the second light distribution texture have similar functions, both of which can diffuse the received light and form a luminous bright surface with uniform brightness.

[0027] For example, when an incident light beam is irradiated on the first exit surface 213 and refracts through the first exit surface 213, the incident light beam can form a plurality of refracted light beams in different directions under the light distribution effect of the first light distribution texture, and form a luminous bright surface with uniform brightness on the first exit surface 213, the area of the luminous bright surface is larger than that of a bright spot formed when the incident light beam directly irradiates on a plane. The light effect of the incident light beam refracting through the distal light guide plate 22 is similar to that of the proximal light guide plate 21, and thus will not be described in detail.

[0028] The light effect realization principle of the vehicle lamp is as follows: the circuit board 12 is electrified to light the light source, the incident light surface 211 receives the light from the light source, the light from the light source enters the proximal light guide plate 21 through the incident light surface 211, the proximal reflection surface 212 reflects part of the light entering the proximal light guide plate 21 to the first exit end, the light reflected by the proximal reflection surface 212 is refracted for the first time and is emitted from the proximal light guide plate 21 through the first exit surface 213, the light emitted from the proximal light guide plate 21 is incident into the distal light guide plate 22, the light incident into the distal light guide plate 22 is refracted again at the distal exit surface 221 to be emitted from the distal light guide plate 22, and then is emitted to the target object.

[0029] Therefore, when the vehicle lamp of the utility model is used to irradiate the target object, the light is refracted at least twice, and is diffused and homogenized twice by the first light distribution texture and the second light distribution texture, each time of refraction means that the light distribution texture diffuses and homogenizes the light once, so that the diffused and homogenized light has a larger light coverage angle and a higher uniformity of spot brightness compared with the light before diffusion and homogenization.

[0030] Therefore, the utility model discloses a light guide unit 20 replaces the existing light guide piece of bar rod shape, and the light guide unit 20 makes light multiple refraction by multiple light guide plates, has the light diffusion and homogenization function of not less than the existing light guide piece, and the size of the light guide unit 20 in the preset queue direction is obviously shorter than the length size of the light guide piece, and the weight of the light guide unit 20 is lighter than the weight of the existing light guide piece of bar rod shape, finally the volume of the vehicle headlamp of the utility model is reduced, and the weight is reduced, which helps reduce the curb weight of the vehicle and save more vehicle body space. For example, when the vehicle headlamp of the utility model is the headlamp of the vehicle, the depth of the mounting groove on the vehicle body for mounting the vehicle headlamp can be reduced, thereby more front compartment space can be saved to arrange the devices in the front compartment.

[0031] It can be understood that in some embodiments, the number of light guide plates is not limited to two, and the light guide unit 20 further includes one or more intermediate light guide plates arranged between the proximal light guide plate 21 and the distal light guide plate 22, and the side of the intermediate light guide plate can be configured to have a uniform light distribution texture similar to the first light distribution texture and the second light distribution texture. In this way, the number of refractions of light in the light guide unit 20 is further increased, and the light spot on the target object irradiated by the vehicle headlamp has a more uniform brightness distribution, which can further reduce the light source on the basis of ensuring the size of the light spot, thereby further improving the light emitting effect of the vehicle headlamp.

[0032] In some embodiments, the light entrance surface 211 is located between the proximal light reflection surface and the first exit surface 213. In this way, the proximal light reflection surface can reflect as much light as possible that enters the proximal light guide plate 21 through the light entrance surface 211 to the first exit surface 213, thereby increasing the proportion of light refracted through the first exit surface 213 among all light emitted by the light source, and further reducing the size of the vehicle headlamp in the preset queue direction, thereby saving more space on the vehicle body in the preset queue direction.

[0033] Optionally, referring to Figure 1 and Figure 2 , the light entrance surface 211 is formed on the outer side of the proximal light guide plate 21, and the outer side of the proximal light guide plate 21 is located between the proximal reflection surface 212 and the first exit surface 213. The circuit board 12 is located on the side of the queue formed by the plurality of light guide plates, and the light source is arranged on one side of the circuit board 12 close to the light entrance surface 211.

[0034] Optionally, the light source can be an LED lamp 11 arranged on the circuit board 12, a laser light source connected to the circuit board 12, or other types of light sources; the number of light sources can be one or multiple, and the types of multiple light sources are different and used in combination.

[0035] In Figure 2The number of light sources can be increased to further improve the brightness of the vehicle headlamp based on the embodiment shown, the first light source is located Figure 2 The second light source is located above the proximal light guide plate 21 shown. Figure 2 The second light source is located below the proximal light guide plate 21 shown, that is Figure 2 The proximal light guide plate 21 shown has two opposite light entrance surfaces 211, the first light source and the second light source are respectively arranged corresponding to the two opposite light entrance surfaces 211.

[0036] In other embodiments, the proximal light guide plate 21 further includes a back light surface 214 arranged opposite to the light entrance surface 211, the position of the back light surface 214 in the proximal light guide plate 21 is as shown Figure 2 The light entrance surface 211 is provided with a relief hole extending to the back light surface 214, at least part of the light source is contained in the relief hole, and the light entrance surface 211 includes the inner wall of the relief hole. In this way, the problem of light leakage of the light source to the outside of the proximal light guide plate 21 can be improved, and more light emitted by the light source can be refracted through the inner wall of the relief hole.

[0037] In some embodiments, the surface of the proximal reflection surface 212 is covered with a sheet structure with a light reflecting function, and the sheet structure is used to reflect part of the light entering the proximal light guide plate 21 through the light entrance surface 211 to the first exit surface 213 and the distal light guide plate 22. Figures 1-2 In the vehicle headlamp shown, the sheet structure is a metal plating layer provided on the surface of the proximal reflection surface 212, which can be an aluminum plating layer. In other embodiments, the sheet structure can also be a metal film or a plastic film attached to the surface of the proximal reflection surface 212.

[0038] In this way, the light entering the proximal light guide plate 21 is reflected to the first exit surface 213 and the distal light guide plate 22 in the form of total reflection by the sheet structure, avoiding the refraction of the light at the proximal reflection surface 212 and the emission of the light from the proximal light guide plate 21, improving the utilization rate of the light and reducing the loss of the light.

[0039] Figures 1-2 In the vehicle headlamp shown, the proximal light guide plate 21 and the distal light guide plate 22 are both flat plate structures, and at least the proximal light guide plate 21 and the distal light guide plate 22 are arranged parallel to each other among the plurality of light guide plates. In some embodiments, the light guide unit 20 further includes one or more intermediate light guide plates arranged between the proximal light guide plate 21 and the distal light guide plate 22, and these intermediate light guide plates are also flat plate structures, and any two of all the light guide plates are arranged parallel to each other.

[0040] It can be understood that in other embodiments, at least one of the light guide plates constituting the light guide unit 20 can also be a curved plate structure with an arc and curvature, or can adopt a design in which at least one light guide plate has a gradually changing thickness dimension, and the gradually changing rule of the thickness dimension of the light guide plate is gradually thickening or gradually thinning from the outer side of the light guide plate to the center of the light guide plate.

[0041] In some embodiments, the vehicle lamp further comprises a light beam cover 23, which is a non-light-transmitting structure with a sleeving opening 232, and comprises a sleeve shell 231 and an inward flange 233. Referring to Figure 2 , the sleeve shell 231 extends along the outer side of the distal light guide plate 22 in a closed loop structure and forms the sleeving opening 232, so that the sleeve shell 231 is sleeved on the distal light guide plate 22 through the sleeving opening 232 and is adaptively connected with the outer side of the distal light guide plate 22, and the inward flange 233 is bent and connected to one end of the sleeve shell 231 away from the proximal light guide plate 21 and extends towards the center of the sleeving opening 232. A limiting step is formed between the inward flange 233 close to the proximal light guide plate 21 and the inner wall of the sleeve shell 231, and the outer side of the distal light guide plate 22 cooperates with the limiting step.

[0042] Optionally, the vehicle lamp of the utility model further comprises a lamp frame 30, referring to Figure 1 and Figure 2 , the lamp frame 30 is fixedly installed on the lamp body 40 and serves as a bearing matrix of the light guide unit 20, and the lamp frame 30 is configured to have a lamp frame 30 cavity for accommodating the light guide unit 20, and the plurality of light guide plates and the light beam cover 23 are arranged in the lamp frame 30 cavity, and the outer side wall of the sleeve shell 231 is fixedly matched with the inner wall of the lamp frame 30 cavity.

[0043] In this way, the light beam cover 23 plays a limiting and fixing role on the distal light guide plate 22 through the limiting step, and at least can prevent the distal light guide plate 22 from being separated from the lamp frame 30 cavity; in addition, the light beam cover 23 can shield the light rays directed to the outer side wall of the distal light guide plate 22, prevent the light rays from being emitted from the outer side wall of the distal light guide plate 22 to cause the light leakage of the outer periphery of the light guide unit 20, so that the light rays can be emitted as much as possible from the distal emission surface 221 of the distal light guide plate 22, in order to further improve the luminous brightness of the distal emission surface 221, and the side close to the light guide plate of the inward flange 233 and the inner wall of the sleeve shell 231 are both smooth surfaces that can reflect light, so that the light rays directed to the outer side wall of the distal light guide plate 22 can be reflected by the side close to the light guide plate of the inward flange 233 and the inner wall of the sleeve shell 231, and finally emitted from the distal emission surface 221.

[0044] Referring to Figures 1-2 , in some embodiments, the distal emission surface 221 is formed by one end of the distal light guide plate 22 away from the proximal light guide plate 21.

[0045] In some embodiments, the first light distribution texture and the second light distribution texture each comprise a plurality of granular protrusions, preferably, the plurality of granular protrusions are arranged in an array similar to corn kernels, and the first light distribution texture and the second light distribution texture are both corn kernel textures, wherein the size of the granular protrusions of the first light distribution texture and the size of the granular protrusions of the second light distribution texture can be the same or different. The corn kernel texture is a common name for the light distribution texture of the granular protrusions arranged in an array in the industry, and the corn kernel texture is a commonly used light distribution texture for light guides, which has a good light diffusion effect and can form a bright area with uniform brightness distribution. Figure 2 θ1 represents the light rays diffused after the light rays refract through the surface of the first light distribution texture, and θ2 represents the light rays diffused after the light rays refract through the surface of the second light distribution texture.

[0046] As can be seen, the light guide unit 20 composed of a plurality of light guide plates replaces the existing rod-shaped light guide, each light guide plate can diffuse light, and the diffusion and conduction effects of the plurality of light guide plates on light are superimposed, so that the light guide unit 20 has a light diffusion and conduction effect not inferior to that of the light guide, and the brightness uniformity of the bright area formed on the far-end exit surface 221 is not inferior to that of the light guide.

[0047] In other embodiments, the first light distribution texture comprises a plurality of first strip-shaped protrusions arranged in parallel, and the second light distribution texture comprises a plurality of second strip-shaped protrusions arranged in parallel, the first strip-shaped protrusions and the second strip-shaped protrusions extend in different directions, and preferably, the extending directions of the first strip-shaped protrusions and the second strip-shaped protrusions are perpendicular to each other.

[0048] In this way, the diffusion and conduction effects of the first strip-shaped protrusions and the second strip-shaped protrusions on light are close to those of the light distribution texture using the corn kernel texture, and the first strip-shaped protrusions and the second strip-shaped protrusions extending in different directions can be used as an alternative embodiment of the corn kernel texture.

[0049] It can be understood that in other embodiments, one of the first light distribution texture and the second light distribution texture comprises a plurality of strip-shaped protrusions arranged in parallel, and the other comprises a plurality of granular protrusions. When the number of light guide plates is three or more, i.e., the light guide unit 20 further comprises one or more intermediate light guide plates arranged between the proximal light guide plate 21 and the distal light guide plate 22, the side portion of at least one intermediate light guide plate comprises a light-uniforming light distribution texture, the light-uniforming light distribution texture comprises granular protrusions and / or strip-shaped protrusions, the more the number of light guide plates with the light-uniforming light distribution texture, the more the number of times the light refracts through the light-uniforming light distribution texture, the more the number of times the light is diffused and homogenized, and the more uniform the brightness of the light-emitting area of the far-end exit surface 221.

[0050] The utility model discloses not limit the type of first light distribution texture and second light distribution texture, as long as two can respectively diffuse the light conduction to each other, and make the luminous area that finally formed in the far end exit surface 221 have the brightness of uniformity can. Figure 1 In some embodiments, the vehicle lamp further comprises a lamp cover 50 arranged on the side of the far-end light guide plate 22 away from the near-end light guide plate 21, the near-end light guide plate 21, the far-end light guide plate 22 and the lamp cover 50 are arranged in sequence along the preset queue direction, the lamp cover 50 is fixedly connected with the lamp body 40, and a lamp cavity for accommodating the light emitting unit 10 and the light guide unit 20 is formed between the lamp cover 50 and the lamp body 40. Since the size of the light guide unit along the preset queue direction is significantly shorter than that of the existing rod-shaped light guide member, the size of the lamp cavity along the preset queue direction can be significantly reduced, thereby reducing the size of the vehicle lamp in the preset queue direction.

[0051] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features that does not result in a contradiction falls within the scope of the present disclosure.

[0052] Those skilled in the art should understand that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application. Any appropriate changes and variations to the above embodiments within the spirit and principles of the present application fall within the scope of the present application.

Claims

1. A vehicle headlight, characterized in that, The light guide unit (20) includes a light-emitting unit (10) and a light guide plate (20) composed of multiple light guide plates. The light guide plate (20) includes at least a near-end light guide plate (21) and a far-end light guide plate (22) arranged along a preset queue direction. The near-end light guide plate (21) includes an incident light surface (211) disposed opposite to the light-emitting unit (10). A near-end reflective surface (212) and a first emitting surface (213) with a first light distribution texture are formed on opposite sides of the near-end light guide plate (21). The far-end light guide plate (22) includes a far-end emitting surface (221) with a second light distribution texture. The near-end reflective surface (212), the first emitting surface (213) and the far-end emitting surface (221) are arranged sequentially along the preset queue direction.

2. The vehicle headlight as described in claim 1, characterized in that, The light-incident surface (211) is located between the near-end reflecting surface (212) and the first exiting surface (213).

3. The vehicle headlight as described in claim 2, characterized in that, The light-incident surface (211) is formed on the outer side of the near-end light guide plate (21); or, The near-end light guide plate (21) also includes a backlight surface (214) disposed opposite to the light incident surface (211). The light incident surface (211) has a clearance hole extending toward the backlight surface (214). The clearance hole accommodates at least a portion of the light-emitting unit (10). The light incident surface (211) includes the inner wall of the clearance hole.

4. The vehicle headlight as described in claim 1, characterized in that, The surface of the near-end reflective surface (212) is covered with a reflective sheet structure, which is used to reflect light from the light-emitting unit (10) to the first emitting surface (213) and the far-end light guide plate (22).

5. The vehicle headlight as described in claim 4, characterized in that, The sheet structure is a metal coating disposed on the surface of the near-end reflective surface (212).

6. The vehicle headlight as described in claim 1, characterized in that, At least the near-end light guide plate (21) and the far-end light guide plate (22) of the plurality of light guide plates are arranged in parallel to each other.

7. The vehicle headlight as described in claim 6, characterized in that, All of the light guide plates are arranged in parallel to each other.

8. The vehicle headlight as described in claim 1, characterized in that, The vehicle headlight also includes a beam sleeve (23), which is fitted onto the far-end light guide plate (22) and cooperates with the side of the far-end light guide plate (22), and the beam sleeve (23) is a non-transparent structure.

9. The vehicle headlight as described in claim 8, characterized in that, The beam-beam sleeve (23) includes a housing (231) and an inner flange (233). The housing (231) has a fitting opening (232). The inner flange (233) is bent and connected to the end of the housing (231) that is relatively far away from the near-end light guide plate (21) and extends toward the center of the fitting opening (232). A limiting step is formed between the inner wall of the housing (231) and the side of the inner flange (233) that is close to the near-end light guide plate (21). The side of the far-end light guide plate (22) cooperates with the limiting step.

10. The vehicle headlight as described in claim 1, characterized in that, The distal emitting surface (221) is formed at the end of the distal light guide plate (22) that is relatively far from the proximal light guide plate (21); or, Both the first and second light distribution textures include multiple granular protrusions; or, The first light distribution texture includes a plurality of parallel first strip-shaped protrusions, and the second light distribution texture includes a plurality of parallel second strip-shaped protrusions, wherein the first strip-shaped protrusions and the second strip-shaped protrusions extend in different directions.

11. A vehicle, characterized in that, Including the vehicle headlights as described in any one of claims 1 to 10.

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