Light guide mounting structure without bright spot defect
By designing a new installation structure of the arc-shaped light guide and light guide bracket, the problems of light guide spots and thermal damage in the headlights are solved, achieving uniform luminescence and durability, reducing cost and complexity.
Patent Information
- Application Number
- CN202422271611.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-14
AI Technical Summary
Existing light guides affect luminescence uniformity and service life due to bright spots and thermal damage in the car lights, and traditional smearing of black paint increases costs and risks.
A light guide installation structure is designed, using arc-shaped light guide and light guide brackets to block the bright spots at the tail through extinction teeth. The tail mounting base fixes the tail of the light guide, and the light guide mounting protrusion and PCB limit column ensure that the light guide is fixed in all directions to avoid thermal damage.
The uniform luminous effect of the light guide is achieved, the risk of thermal damage is reduced, the installation process is simplified, the cost is reduced, and the product quality and life is improved.
Smart Images
Figure CN223137662U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle lamps, and particularly relates to a light guide installation structure without bright spot defects. Background Art
[0002] The light guide has the advantages of simple structure, flexible and changeable shape, etc., and has gradually become a common optical structure on automotive vehicle lamps. In the prior art, the light guide is generally fixed on the light guide bracket by connection methods such as buckles and screws. When the LED light source emits light from one end of the light guide, obvious bright spots will appear at both ends of the light guide, and these bright spots greatly affect the uniformity of the vehicle lamp lighting. In order to weaken the bright spot problem at the light inlet and the tail of the light guide, it is usually necessary to set up a complex structure to block the bright spot at the light inlet, and at the same time apply black paint to the tail of the light guide. Although this solution weakens the bright spot problem to a certain extent, applying black paint not only increases the process and production cost, but also may cause the tail of the light guide to turn yellow or deform due to excessive heat absorption, seriously affecting the service life of the vehicle lamp. Content of the Utility Model
[0003] The purpose of the utility model is to overcome the above problems existing in the prior art, and provide a new light guide installation structure. On the basis of ensuring firm installation and accurate positioning of the light guide, this light guide installation structure effectively avoids the bright spots and thermal damage at both ends of the light guide, and realizes a uniform lighting effect. To achieve the above purpose, the technical solutions adopted by the utility model are as follows:
[0004] A light guide installation structure without bright spot defects includes an arc-shaped light guide 6 and a supporting light guide bracket 1. A light extinction tooth 12 is arranged on the outer surface of the head of the arc-shaped light guide 6. A tail mounting seat 2 and a head fixing seat 3 are arranged on the light guide bracket 1. The head and tail of the arc-shaped light guide 6 are respectively fixed in the head fixing seat 3 and the tail mounting seat 2 of the light guide bracket 1, and the tail end face of the arc-shaped light guide 6 is blocked by the tail mounting seat 2.
[0005] Further, a light guide upper flange 7 and a light guide lower flange 8 are respectively arranged on the upper and lower sides of the arc-shaped light guide 6. A supporting bracket upper flange 4 and a bracket lower flange 5 are arranged on the light guide bracket 1. The light guide upper flange 7 and the light guide lower flange 8 are respectively in close contact with the bracket upper flange 4 and the bracket lower flange 5 and are fixed by them.
[0006] Further, a light guide installation boss 9 is further arranged on the outer surface of the head of the arc-shaped light guide 6. The light guide installation boss 9 is arranged along the radial direction of the arc-shaped light guide and is clamped in the card slot of the head fixing seat 3.
[0007] Further, the number of the light guide installation bosses 9 is 2, and they are symmetrically distributed on the upper and lower sides of the head of the arc-shaped light guide 6.
[0008] Further, a PCB limiting post 10 is also provided on the outer surface of the head of the arc-shaped light guide 6. The PCB limiting post 10 is arranged along the axial direction of the arc-shaped light guide and extends beyond the head end face of the arc-shaped light guide. The PCB limiting post is mainly used to limit the distance between the head of the light guide and the PCB board, preventing it from being blackened or damaged by the high temperature generated when the LED on the PCB board works.
[0009] Further, the number of the PCB limiting posts 10 is at least one.
[0010] Further, the light guide mounting structure further includes a bracket cover plate 11. The bracket cover plate 11 is fixed to the back of the light guide bracket 1 and faces the tail mounting seat 2. In order to meet the mold release requirements of the light guide bracket, a hole is dug in the tail mounting seat 2. To solve the light leakage problem here, a matching bracket cover plate is provided for shielding and screening.
[0011] Further, at least two arc-shaped light guides 6 are fixed on each light guide bracket 1, and the lengths of these arc-shaped light guides 6 are the same or different.
[0012] Furthermore, the arc-shaped light guides 6 are fixed side by side vertically on the same light guide bracket 1.
[0013] Compared with the original light guide mounting structure, the present utility model designs a light extinction tooth structure at the head of the light guide that can disperse the light spot on the light incident side. At the same time, the tail of the light guide is hidden in the tail fixing seat of the light guide bracket, thus completely shielding the tail light spot and achieving a visual effect of uniform lighting. In addition, through the cooperation between the head mounting seat and the light guide mounting convex head, and between the upper and lower flanges of the bracket and the upper and lower flanges of the light guide, the present utility model realizes reliable fixation and connection in all directions of the light guide, enabling it to successfully pass the vibration test. The light guide mounting structure is relatively simple, with low improvement cost and easy disassembly and assembly. It can not only realize the fixed connection of multiple light guides but also greatly reduce the risk of thermal damage to the light guide, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is an exploded schematic view of the light guide mounting structure of the present utility model;
[0015] Figure 2 is a three-dimensional schematic view of the light guide mounting structure of the present utility model;
[0016] Figure 3 is Figure 2 a partial enlarged schematic view of area A in
[0017] Figure 4 is Figure 3 a sectional view taken along line A-A in
[0018] Figure 5This is a three-dimensional schematic diagram of another angle of the optical guide installation structure described in the present utility model;
[0019] Figure 6 It is Figure 5 a partially enlarged schematic diagram of area B in
[0020] Figure 7 It is Figure 5 a sectional view taken along line B-B in
[0021] Figure 8 This is a front schematic diagram of the optical guide installation structure described in the present utility model.
[0022] Wherein: 1 - optical guide bracket, 2 - tail mounting seat, 3 - head fixing seat, 4 - upper flanging of the bracket, 5 - lower flanging of the bracket, 6 - arc-shaped optical guide, 7 - upper flanging of the optical guide, 8 - lower flanging of the optical guide, 9 - optical guide mounting boss, 10 - PCB limit post, 11 - bracket cover plate, 12 - light extinction teeth. Specific embodiments
[0023] To enable those of ordinary skill in the art to fully understand the technical solutions and beneficial effects of the present utility model, the following further explanations are provided in conjunction with specific embodiments.
[0024] In the present utility model, the "head" refers to the end of the optical guide or the optical guide bracket close to the light source, the "tail" refers to the end of the optical guide or the optical guide bracket far from the light source, and the "up, down, left, right, front, and back" etc. refer to the orientation and direction in the installation state as shown in the attached drawings.
[0025] Previously, the optical guide was often directly clamped on the optical guide bracket, and then the light source on the PCB board was aligned with the light incident surface of the head of the optical guide. After the LED light source was lit, it emitted light, and the light passed through the optical guide from the light incident surface and then emitted outward to achieve the corresponding vehicle lamp function. There are some problems in this process: First, bright spots will appear at the head and tail of the left and right ends of the optical guide, resulting in uneven light emission; Second, the LED light source generates a large amount of heat during operation. If it is too close to the light incident surface of the head of the optical guide, it will cause damage to the optical guide.
[0026] To solve these problems, we redesigned an optical guide installation structure as shown in Figures 1-8 The new optical guide installation structure mainly includes an optical guide bracket 1, an arc-shaped optical guide 6, and a bracket cover plate 11. One or more arc-shaped optical guides 6 are fixed side by side in the transverse direction on the optical guide bracket 1, and the bracket cover plate 11 is fixed in the longitudinal direction on the back of the optical guide bracket 1.
[0027] A tail mounting seat 2 is provided on the left side of the optical guide bracket 1, a head fixing seat 3 is provided on the right side of the optical guide bracket 1, and an upper flanging 4 and a lower flanging 5 of the bracket are arranged side by side up and down between the tail mounting seat 2 and the head fixing seat 3.
[0028] A circle of densely arranged matte teeth 12 is formed on the outer surface of the right head of the arc-shaped light guide 6, and light guide mounting protrusions 9 are arranged on the upper and lower sides of the right head of the arc-shaped light guide 6, and a PCB limit column 10 is formed next to one of the light guide mounting protrusions 9. In addition, light guide upper flanges 7 and light guide lower flanges 8 matching the bracket upper flanges 4 and bracket lower flanges 5 are arranged on the upper and lower sides of the arc-shaped light guide 6. The shape of the upper and lower flanges of the light guide is similar to that of a shark fin, and is embedded in the groove structure formed by the upper and lower flanges of the bracket, and the cooperation of the two prevents the slender light guide from moving or shaking in the longitudinal direction.
[0029] During assembly, the head and tail ends of the arc light guide 6 are fixed in the head fixing seat 3 and the tail mounting seat 2 respectively, and the upper and lower flanges are used to limit the arc light guide 6 to prevent it from shaking up and down or left and right. Figures 2-4 As shown, the tail mounting seat 2 includes a vertical C-shaped baffle, which is used to wrap and clamp the tail of the light guide, thereby limiting its movement. In addition, the C-shaped baffle can also effectively block the bright spot at the tail of the light guide, preventing it from emitting outward and affecting the uniformity of light emission. The tail mounting seat 2 replaces the traditional black paint method, avoiding the heat absorption and temperature rise of this part affecting the surface quality and service life of the light guide.
[0030] The fixed state of the right end of the light guide is as follows Figures 5-7 As shown. The light guide mounting bosses 9 on the upper and lower sides of the light guide head are inserted into the slots of the head fixing seat 3 on the right side of the light guide bracket, thereby locking the arc light guide 6 and limiting its left and right movement. The PCB limit post 10 is toward the right side of the light guide and extends outward by one end, so that it protrudes from the end face of the light guide head, so that it can resist the PCB board and prevent it from being affected by vibration and being too close to the light guide to cause thermal damage.
[0031] The light guide installation structure provided by the utility model is very simple and easy to assemble and disassemble. Since the light guide is sufficiently fixed and supported in all directions, it is very reliable and can pass the vibration test smoothly. The utility model overcomes the problem of uneven light emission caused by bright spots by shielding the head matting teeth and the tail mounting seat, and avoids the risk of thermal damage at both ends of the light guide, effectively improving the surface quality and life of the product.
Claims
1. An optical waveguide installation structure without bright spot defects, characterized in that: The optical waveguide mounting structure includes an arc-shaped optical waveguide (6) and an optical waveguide bracket (1). An extinction tooth (12) is provided on the outer surface of the head of the arc-shaped optical waveguide (6). A tail mounting seat (2) and a head fixing seat (3) are provided on the optical waveguide bracket (1). The head and tail of the arc-shaped optical waveguide (6) are respectively fixed in the head fixing seat (3) and the tail mounting seat (2) of the optical waveguide bracket (1), and the tail end face of the arc-shaped optical waveguide (6) is blocked by the tail mounting seat (2).
2. The optical waveguide mounting structure according to claim 1, characterized in that: An upper optical waveguide flange (7) and a lower optical waveguide flange (8) are respectively provided on the upper and lower sides of the arc-shaped optical waveguide (6). A matching upper bracket flange (4) and a lower bracket flange (5) are provided on the optical waveguide bracket (1). The upper optical waveguide flange (7) and the lower optical waveguide flange (8) are respectively fixedly connected to the upper bracket flange (4) and the lower bracket flange (5).
3. The optical waveguide mounting structure according to claim 1, wherein: An optical waveguide mounting boss (9) is provided on the outer surface of the head of the arc-shaped optical waveguide (6). The optical waveguide mounting boss (9) is arranged along the radial direction of the arc-shaped optical waveguide and is clamped in the card slot of the head fixing seat (3).
4. The optical waveguide mounting structure according to claim 3, characterized in that: The number of the optical waveguide mounting bosses (9) is two, and they are symmetrically distributed on the upper and lower sides of the arc-shaped optical waveguide (6).
5. The optical waveguide mounting structure according to claim 1, characterized in that: A PCB limiting post (10) is provided on the outer surface of the head of the arc-shaped optical waveguide (6). The PCB limiting post (10) is arranged along the axial direction of the arc-shaped optical waveguide and extends beyond the head end face of the arc-shaped optical waveguide.
6. The optical waveguide mounting structure according to claim 5, characterized in that: The number of the PCB limiting posts (10) is at least one.
7. The optical waveguide mounting structure according to claim 1, wherein: The optical waveguide mounting structure further includes a bracket cover plate (11). The bracket cover plate (11) is fixed on the back of the optical waveguide bracket (1) and faces the tail mounting seat (2).
8. The optical waveguide mounting structure according to claim 1, wherein: At least two arc-shaped optical waveguides (6) are fixed on each optical waveguide bracket (1), and the lengths of the arc-shaped optical waveguides (6) are the same or different.
9. The optical waveguide mounting structure according to claim 8, wherein: The arc-shaped optical waveguides (6) are fixedly arranged side by side in the vertical direction on the same optical waveguide bracket (1).