An optical system integrating inner lens and reflective bowl for vehicle lamp

Abstract

The present invention provides an optical system integrating an inner lens and a reflective bowl for a vehicle lamp, comprising a heat sink, an inner lens and a reflective bowl integrated part and a circuit board, wherein the inner lens and the reflective bowl integrated part are integrally formed parts, including a B area of ​​the reflective bowl functional area close to the LED end, a C area of ​​the diffuse reflection function for solving the common bright spot problem of the reflective bowl, and a D area of ​​the inner lens functional area, wherein the D area is located in front of the B area, and the C area is located between the B area and the D area, and the C area realizes the connection and transition between the B area and the D area, and the entire part of the inner lens and the reflective bowl integrated part is a transparent part, and adopts local aluminum plating and local leather grain to meet the optical performance requirements. By using only one part to realize the function that requires the combination and installation of multiple parts to realize, a smaller space is required in the Z direction, and leather grain is added in the C area to solve the bright spot problem, the wall thickness is thinner, the cost is lower, and the space required in the X direction is also smaller.

Description

Technical Field

[0001] The invention relates to the field of automobile lighting, and in particular to an optical system integrating an inner lens and a reflective bowl for an automobile lamp. Background Art

[0002] With the continuous development of the automotive industry, the shape of headlights is becoming more and more novel, the functions of headlights are becoming more and more intelligent and humanized, and the space inside the headlights is becoming more compact.

[0003] The optical system of the headlight usually has two forms for long and irregular light-emitting areas. One form is Figure 5 Solution 1 shown: The circuit board 3 is positioned on the heat sink 1 by means of positioning pins to form a heat sink subassembly. The heat sink subassembly and the reflective bowl 4 are fixed with screws to form a reflective bowl subassembly. The inner lens 5 needs to be installed in front of the reflective bowl subassembly to ensure optical uniformity. Due to the limitation of the installation method and the space limitation in the AFS (follow-action steering) adjustment system of the headlight, the inner lens 5 cannot be directly installed with the reflective bowl 4, but is installed on the housing 6. This design not only requires a larger space in the Z direction, but also the inner lens 5 cannot be directly installed with the reflective bowl 4, there will be installation errors, affecting the optical performance, and the bright spots produced cannot be well resolved. In addition, the installation time of the production line will also increase. Another form such as Figure 6 Solution 2 shown: The circuit board 3 is positioned on the heat sink 1 by the positioning pins to form a heat sink subassembly, and the heat sink subassembly is fixed to the thick-walled light guide 7 by screws. To meet the optical uniformity, the thick-walled light guide needs a larger space in the X direction, and the length in the X direction needs to be about 20mm. In addition, the thickness of the thick-walled light guide 7 is much thicker than the wall thickness of the reflective bowl 4, which is costly and has high mold requirements.

[0004] In view of the above problems, on the basis of ensuring the realization of optical performance and light efficiency, further avoiding the bright spot problem, and further in order to reduce installation errors, maximize integration and reduce installation hours, improve spatial flexibility and reduce costs, the present invention designs an optical system integrating an inner lens and a reflective bowl. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an optical system integrating an inner lens and a reflective bowl for a vehicle lamp, which achieves a function that requires the combined installation of multiple parts by using only one part, requires a smaller space in the Z direction, and adds leather grain in the C zone to solve the bright spot problem, has a thinner wall thickness, lower cost, and requires a smaller space in the X direction.

[0006] The present invention provides an optical system integrating an inner lens and a reflective bowl for a vehicle lamp, comprising a heat sink, an inner lens and a reflective bowl integrated component and a circuit board. The circuit board is positioned on the heat sink by positioning pins to form a heat sink subassembly, and the heat sink subassembly and the inner lens and the reflective bowl integrated component are fixed by screws. The inner lens and the reflective bowl integrated component is an integrally formed part, comprising a B region of a reflective bowl functional area close to an LED end, a C region of a diffuse reflection function for solving a common bright spot problem of the reflective bowl, and a D region of an inner lens functional area. The D region of the inner lens functional area is located in front of the B region of the reflective bowl functional area, the C region of the diffuse reflection functional area is located between the B region of the reflective bowl functional area and the D region of the inner lens functional area, the C region realizes the connection and transition between the B region of the reflective bowl functional area and the D region of the inner lens functional area, and the entire part of the inner lens and the reflective bowl integrated component is a transparent part, and optical performance requirements are met by using local aluminum plating and local leather graining.

[0007] A further improvement is that the B area of ​​the functional area of ​​the reflective bowl is aluminum-plated or partially aluminum-plated, or a highly reflective material is used to achieve the reflection function of the light source and meet the regulations.

[0008] A further improvement is that: the C region with diffuse reflection function is added with skin grain, or a layer of white scattering material is plated on the upper surface or lower surface of the C region to realize diffuse reflection function and solve the bright spot problem.

[0009] A further improvement is that an optical pattern is added in front of the D area of ​​the inner lens functional area to meet the optical uniformity requirement.

[0010] A further improvement is that the C area with diffuse reflection function is located at the lower side in the entire inner lens and reflection bowl integrated component.

[0011] A further improvement is that the B1 area of ​​the reflective bowl functional area B, which is far away from the light source in the wall thickness direction, is aluminum-plated to prevent some light from leaking from the reflective bowl functional area B, which is close to the light source.

[0012] The beneficial effects of the present invention are: avoiding the defect that the inner lens and the reflective bowl cannot be directly installed, resulting in mismatched light shapes and thus causing more complicated design tolerances and production and installation tolerance adjustments; the bright spot problem caused by the reflective bowl implementation method is well solved by adding and utilizing the leather texture of the C zone; the X-direction and Z-direction of the vehicle body coordinate system both save the lamp body space, meet the requirements of increasingly compact vehicle lights, reduce later design and production changes, and make the entire optical system more stable and reliable; and greatly reduce the number of parts and thus reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an isometric view of the present invention.

[0014] Figure 2 It is a top view of the present invention.

[0015] Figure 3 It is an exploded view of the present invention.

[0016] Figure 4 It is a cross-sectional view taken along line AA of the present invention.

[0017] Figure 5 This is a cross-sectional view taken at AA of conventional optical system solution 1.

[0018] Figure 6 This is a cross-sectional view taken at AA of conventional optical system solution 2.

[0019] Among them: 1-heat sink, 2-inner lens and reflective bowl integrated component, 3-circuit board, 4-reflective bowl, 5-inner lens, 6-housing, 7-thick-walled light guide, 8-LED. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "left", "right", "up", "down", "front", "rear", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the automobile industry and the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or component must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] like Figure 3 As shown, this embodiment provides an optical system integrating an inner lens and a reflective bowl for a vehicle lamp, comprising a heat sink 1, an inner lens and a reflective bowl integrated component 2, and a circuit board 3. Figure 4As shown, the circuit board 3 is positioned on the heat sink 1 by positioning pins (the viewing angle is not shown in the figure) to form a heat sink subassembly, and then the heat sink subassembly is fixed to the light guide and reflective bowl integrated component 2 by screws. The inner lens and reflective bowl integrated component 2 integrates the inner lens and the reflective bowl into one piece. The inner lens and reflective bowl integrated component 2 is a transparent part, and adopts local aluminum plating and local leather grain to meet the optical performance requirements. Among them, the B area close to the LED 8 (light-emitting diode) end is the reflective bowl functional area, and the B area is partially aluminum plated. The C area is a diffuse reflection functional area (diffuse reflection is the phenomenon that light projected on a rough surface is reflected in all directions. When a beam of parallel incident light hits a rough surface, the surface will reflect the light in all directions. Therefore, although the incident light is parallel to each other, due to the inconsistency of the normal directions of each point, the reflected light is irregularly reflected in different directions. This reflection is called "diffuse reflection" or "diffusion"), which is used to solve the common bright spot problem of the reflective bowl. In this embodiment, the C area realizes its diffuse reflection function by adding leather grains to solve the bright spot problem. Area D is the inner lens functional area, and an optical pattern is made in front of it to meet the requirements of optical uniformity. Area D of the inner lens functional area is located in front of area B of the reflective bowl functional area, and area C of the diffuse reflection functional area is located between area B of the reflective bowl functional area and area D of the inner lens functional area. Area C is located at the lower side of the entire inner lens and reflective bowl integrated component 2, and area C realizes the connection and transition between area B of the reflective bowl functional area and area D of the inner lens functional area.

[0023] The wall thickness direction of the reflective bowl functional area B, that is, the area B1 far away from the light source, can be aluminum-plated to prevent partial light leakage from the reflective bowl functional area B of the transparent material close to the light source and to prevent the occurrence of bright spots and stray light.

[0024] The optical system of the integrated inner lens and reflector bowl for the headlight uses only one part to achieve the function that requires the combination and installation of multiple parts, avoiding the defects of light shape mismatch caused by inability to install directly, which leads to more cumbersome design tolerance and production installation tolerance adjustment. The X and Z directions save the space of the lamp body, reduce the later design and production changes, make the entire optical system more stable and reliable, and greatly reduce the production cost.

Claims

1. An optical system integrating an inner lens and a reflective bowl for a vehicle lamp, characterized in that: The invention comprises a heat sink (1), an inner lens and a reflective bowl integrated component (2) and a circuit board (3). The circuit board (3) is positioned on the heat sink (1) by means of positioning pins to form a heat sink subassembly. The heat sink subassembly and the inner lens and a reflective bowl integrated component (2) are fixed by means of screws. The inner lens and a reflective bowl integrated component (2) are integrally formed parts, comprising a reflective bowl functional area B region close to an LED (8) end, a diffuse reflection functional area C region for solving the common bright spot problem of the reflective bowl, and an inner lens functional area D region. The inner lens functional area D region is located in front of the reflective bowl functional area B region. The diffuse reflection functional area C region is located between the reflective bowl functional area B region and the inner lens functional area D region. The C region realizes the connection and transition between the reflective bowl functional area B region and the inner lens functional area D region. The inner lens and a reflective bowl integrated component is a transparent part as a whole, and adopts local aluminum plating and local leather graining to meet the optical performance requirements.

2. The optical system of an inner lens and a reflective bowl integrated with a vehicle lamp as claimed in claim 1, characterized in that: The B area of ​​the functional area of ​​the reflective bowl is aluminum-plated or partially aluminum-plated, or a highly reflective material is used to achieve the reflection function of the light source and meet the regulations.

3. The optical system of an inner lens and a reflective bowl integrated for a vehicle lamp as claimed in claim 1, characterized in that: The diffuse reflection function is implemented by adding skin grain to the C region, or coating the upper surface or lower surface of the C region with a layer of white scattering material to achieve diffuse reflection function and solve the bright spot problem.

4. The optical system of an integrated inner lens and a reflective bowl for a vehicle lamp as claimed in claim 1, characterized in that: An optical pattern is added in front of the D area of ​​the inner lens functional area to meet the optical uniformity requirement.

5. The optical system of an integrated inner lens and a reflective bowl for a vehicle lamp as claimed in claim 1, characterized in that: The C region with the diffuse reflection function is located at the lower side in the entire inner lens and reflection bowl integrated component (2).

6. The optical system of an integrated inner lens and a reflective bowl for a vehicle lamp as claimed in claim 1, characterized in that: The B1 area of ​​the reflective bowl functional area in the wall thickness direction of the B area far from the light source is aluminum-plated to prevent part of the light from leaking from the B area of ​​the reflective bowl functional area close to the light source.

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