Light guide fixing structure and vehicle lamp

Abstract

This utility model belongs to the field of light guide technology, specifically relating to a light guide fixing structure and a vehicle light, including: a bracket, a cover plate, a light guide, a housing, a circuit board, and a heat sink. The heat sink is mounted on the housing and has a first positioning post. The circuit board is mounted on the heat sink and has a first positioning hole for the first positioning post to pass through. A light source is located on the circuit board. The bracket and the cover plate together form an installation channel, and both the bracket and the cover plate are mounted on the housing. The light guide is fixedly installed in the installation channel, with its light-inlet end extending into the housing and positioned close to the light source. A second positioning hole is provided on the light-inlet end of the light guide for the first positioning post to pass through. This utility model achieves joint positioning of the heat sink, the circuit board, and the light guide through the cooperation of the first positioning post with the first and second positioning holes, ensuring consistent positioning of the light source and improving positioning accuracy. The bracket and the cover plate together form an installation channel to enclose the light guide, preventing light leakage.

Description

Technical Field

[0001] This utility model relates to the field of optical guide technology, and in particular to an optical guide fixing structure and a vehicle lamp. Background Technology

[0002] As a structural component that directs LEDs to the desired light-emitting location, light guides are increasingly widely used in automotive lighting. However, due to their slender shape, securing the light source to the light guide has always been a challenging problem. Currently, common methods for fixing light guides to the light source involve snap-fitting or screw fastening. However, in practical applications, these methods are often limited by structural constraints due to scratches and heat risks, leading to positioning errors and frequent issues such as light leakage or bright spots. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the technical problem that the fixing of the light guide and the light source is prone to deviation and light leakage in the prior art, this utility model provides a light guide fixing structure and vehicle lamp that can achieve precise positioning.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a light guide fixing structure, which includes: a bracket, a cover plate, a light guide, a housing, a circuit board, and a heat sink.

[0005] The heat sink is mounted on the housing, and a first positioning post is provided on the heat sink. The circuit board is mounted on the heat sink, and a first positioning hole is provided on the circuit board for the first positioning post to pass through. A light source is provided on the circuit board.

[0006] The bracket and the cover plate together form an installation channel, and both the bracket and the cover plate are installed on the housing;

[0007] The light guide is disposed within the mounting channel, with its light-incident end extending into the housing and positioned close to the light source. A second positioning hole is provided on the light-incident end of the light guide for the first positioning post to pass through. Thus, by engaging the first positioning post with the first and second positioning holes respectively, the heat sink, circuit board, and light guide are positioned together, ensuring consistent positioning of the light source and improving positioning accuracy. The bracket and cover plate together form a mounting channel to enclose the light guide, preventing light leakage.

[0008] Furthermore, the light-incident end of the light guide has a flat plate positioning block, on which the second positioning hole is formed. Through the cooperation of the first positioning post with the first positioning hole and the second positioning hole respectively, the light-incident end of the light guide and the circuit board share the same positioning structure, ensuring accurate positioning and effectively avoiding light source errors caused by assembly.

[0009] Furthermore, the flat positioning block is provided with a light-incident surface, which faces the light source and is parallel to it. The flat positioning block is also provided with a top rib, which protrudes from the light-incident surface and its end face abuts against the circuit board. Thus, the top rib protruding from the light-incident surface and abutting against the circuit board creates a gap between the light source and the light-incident surface, preventing scratches between the light source and the light guide. By providing a light-incident surface on the flat positioning block, the light emitted by the light source directly enters the light guide through the light-incident surface, effectively avoiding the heat risk caused by light source refraction, making the light guide's emission more reliable.

[0010] Furthermore, a first baffle rib is provided around the opening of the mounting hole facing the bracket and the cover plate, a second baffle rib is provided at one end of the bracket, and a third baffle rib is provided at one end of the cover plate. The second baffle rib covers the lower end of the first baffle rib, and the third baffle rib covers the upper end of the first baffle rib. Thus, by forming a staggered structure of the first, second, and third baffle ribs, light leakage is effectively prevented.

[0011] Furthermore, a first light-blocking strip is provided at the other end of the bracket, and a second light-blocking strip is provided at the other end of the cover plate. The first and second light-blocking strips together form the installation channel. Thus, by wrapping the light guide with the first and second light-blocking strips, light leakage is effectively prevented.

[0012] Furthermore, the light guide is provided with second positioning posts on its upper and lower sides respectively, the inner wall of the bracket is provided with a positioning groove one for inserting one of the second positioning posts, and the inner wall of the cover plate is provided with a positioning groove two for inserting another second positioning post. Thus, the light guide is fixed to the bracket and the cover plate by the cooperation of the second positioning posts with positioning groove one and positioning groove two.

[0013] Furthermore, a sealing ring is provided on the radiator, and the sealing ring is located at the connection between the radiator and the housing.

[0014] Furthermore, the heat sink is connected to the circuit board via a first screw post, and the heat sink is connected to the housing via a second screw post. Thus, the connection between the heat sink and the circuit board via the first screw post, and the connection between the heat sink and the housing via the second screw post, makes the light guide light source replaceable and easy to disassemble, thereby improving the lifespan of the lamp.

[0015] Furthermore, both the bracket and the cover plate are connected to the housing via third screw posts. This allows for the assembly and disassembly of the bracket and cover plate from the housing.

[0016] A vehicle light, comprising a light guide fixing structure as described in any of the preceding claims.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) This utility model achieves the joint positioning of the heat sink, circuit board and light guide by the cooperation of the first positioning post with the first positioning hole and the second positioning hole respectively, ensuring the consistency of the light source positioning and improving the positioning accuracy. The bracket and cover plate form an installation channel to wrap the light guide, which can avoid light leakage.

[0019] (2) By setting a planar positioning block, the top rib protrudes from the light-incident surface and abuts against the circuit board, so that a gap is formed between the light source and the light-incident surface, avoiding scratches between the light source and the light guide. By setting the light-incident surface on the planar positioning block, the light emitted by the light source directly enters the light guide through the light-incident surface, which can effectively avoid the heat risk caused by the refraction of the light source, and the light guide light emission is more reliable. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of a light guide fixing structure according to the present invention;

[0022] Figure 2 This is an exploded view of a light guide fixing structure according to the present invention;

[0023] Figure 3 for Figure 1 Internal structure diagram;

[0024] Figure 4 for Figure 1 Partial structural diagram;

[0025] Figure 5 for Figure 1 A partial structural diagram.

[0026] In the diagram: 1. Bracket; 2. Cover plate; 3. Light guide; 4. Housing; 5. Circuit board; 6. Heat sink; 11. Positioning groove one; 12. Second baffle; 13. Third screw post; 14. First light-blocking strip; 21. Positioning groove two; 22. Third baffle; 23. Second light-blocking strip; 31. Second positioning post; 32. Flat positioning block; 41. Third screw hole; 42. First baffle; 43. Second screw post; 44. Mounting hole; 51. Light source; 52. First positioning hole; 53. First screw hole; 61. First positioning post; 62. First screw post; 63. Second screw hole; 64. Sealing ring; 321. Light-incident surface; 322. Positioning hole; 323. Positioning groove; 324. Top rib. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] like Figures 1 to 5 The diagram shows a preferred embodiment of the present invention. This embodiment provides a fixing structure for a light guide 3, comprising a bracket 1, a cover plate 2, a light guide 3, a housing 4, a circuit board 5, and a heat sink 6. The heat sink 6 is mounted on the housing 4 and has a first positioning post 61. The circuit board 5 is mounted on the heat sink 6 and has a first positioning hole 52 for the first positioning post 61 to pass through. A light source 51 is mounted on the circuit board 5. The bracket 1 and the cover plate 2 together form an installation channel, both mounted on the housing 4. The light guide 3 is disposed within the installation channel, with its light-incident end extending into the housing 4 and positioned close to the light source 51. A second positioning hole for the first positioning post 61 to pass through is provided on the light-incident end of the light guide 3. Thus, by cooperating with the first positioning post 61 in conjunction with the first positioning hole 52 and the second positioning hole, the heat sink 6, the circuit board 5, and the light guide 3 are positioned together, ensuring consistent positioning of the light source 51 and improving positioning accuracy. The bracket 1 and the cover plate 2 together form an installation channel to enclose the light guide 3, preventing light leakage.

[0031] In a preferred embodiment, the light-incident end of the light guide 3 has a flat plate positioning block 32, on which a second positioning hole is formed. By cooperating with the first positioning post 61 with the first positioning hole 52 and the second positioning hole respectively, the light-incident end of the light guide 3 and the circuit board 5 share the same positioning structure, ensuring accurate positioning and effectively avoiding errors in the light source 51 caused by assembly.

[0032] Specifically, there are two first positioning pins 61 and two first positioning holes 52. The second positioning hole includes a positioning hole 322 and a positioning groove 323. One first positioning pin 61 passes through one first positioning hole 52 and is inserted into the positioning hole 322, and the other first positioning pin 61 passes through the other first positioning hole 52 and is inserted into the positioning groove 323.

[0033] In a preferred embodiment, the flat positioning block 32 is provided with a light-incident surface 321, which is positioned directly opposite and parallel to the light source 51. The flat positioning block 32 is provided with a top rib 324, which protrudes from the light-incident surface 321 and abuts against the circuit board 5. Thus, the top rib 324 protrudes from the light-incident surface 321 and abuts against the circuit board 5, creating a gap between the light source 51 and the light-incident surface 321, preventing scratches between the light source 51 and the light guide 3. By providing the light-incident surface 321 on the flat positioning block 32, the light emitted by the light source 51 directly enters the light guide 3 through the light-incident surface 321, effectively avoiding the heat risk caused by the refraction of the light source 51, and making the light emission from the light guide 3 more reliable.

[0034] In a preferred embodiment, a first baffle 42 is provided around the opening of the mounting hole 44 facing the bracket 1 and the cover plate 2. A second baffle 12 is provided at one end of the bracket 1, and a third baffle 22 is provided at one end of the cover plate 2. The second baffle 12 covers the lower end of the first baffle 42, and the third baffle 22 covers the upper end of the first baffle 42. Thus, by forming a staggered structure of the first baffle 42, the second baffle 12, and the third baffle 22, light leakage is effectively prevented.

[0035] In a preferred embodiment, a first light-blocking strip 14 is provided at the other end of the bracket 1, and a second light-blocking strip 23 is provided at the other end of the cover plate 2. The first light-blocking strip 14 and the second light-blocking strip 23 together form an installation channel. Thus, by wrapping the light guide 3 with the first light-blocking strip 14 and the second light-blocking strip 23, light leakage is effectively prevented.

[0036] In a preferred embodiment, the upper and lower sides of the light guide 3 are respectively provided with second positioning posts 31, the inner wall of the bracket 1 is provided with a positioning groove 11 for inserting one second positioning post 31, and the inner wall of the cover plate 2 is provided with a positioning groove 21 for inserting another second positioning post 31. Thus, the light guide 3 is fixed to the bracket 1 and the cover plate 2 by the cooperation of the second positioning post 31 with the positioning groove 11 and the positioning groove 21.

[0037] In a preferred embodiment, a sealing ring 64 is provided on the radiator 6, and the sealing ring 64 is located at the connection between the radiator 6 and the housing 4.

[0038] In a preferred embodiment, the heat sink 6 is connected to the circuit board 5 via a first screw post 62, and the circuit board 5 has a first screw hole 53 for mounting the first screw post 62. The heat sink 6 is connected to the housing 4 via a second screw post 43, and the heat sink 6 has a second screw hole 63 for mounting the second screw post 43. Thus, the connection between the heat sink 6 and the circuit board 5 via the first screw post 62, and the connection between the heat sink 6 and the housing 4 via the second screw post 43, makes the light guide 3 and light source 51 replaceable and easy to disassemble, thereby improving the lifespan of the lamp.

[0039] In a preferred embodiment, both the bracket 1 and the cover plate 2 are connected to the housing 4 via a third screw post 13. The housing 4 has a third screw hole 41 for mounting the third screw post 13. This allows for the assembly and disassembly of the bracket 1 and the cover plate 2 from the housing 4.

[0040] The installation method of this utility model is as follows:

[0041] The bracket 1 and the cover plate 2 surround and enclose the outside of the light guide 3. One second positioning post 31 of the light guide 3 is inserted into the positioning groove 11, and the other second positioning post 31 of the light guide 3 is inserted into the positioning groove 21. The bracket 1 is locked to the housing 4 by the third screw post 13, and the cover plate 2 is also locked to the housing 4 by the third screw post 13. The light guide 3, the bracket 1, the cover plate 2 and the housing 4 constitute the light guide 3 sub-assembly.

[0042] The circuit board 5 is fastened to the heat sink 6 by the first screw post 62. At this time, the first positioning post 61 passes through the first positioning hole 52, and the circuit board 5 and the heat sink 6 form the light source 51 sub-assembly.

[0043] The light source 51 sub-assembly is mounted on the light guide 3 sub-assembly. The connection between the heat sink 6 and the housing 4 is sealed by the sealing ring 64. The heat sink 6 and the housing 4 are connected and fixed by the second screw post 43. At this time, the first positioning post 61 is inserted into the second positioning hole of the planar positioning block 32 until the end face of the top rib 324 abuts against the circuit board 5, thus completing the connection and fixation between the light source 51 sub-assembly and the light guide 3 sub-assembly.

[0044] A vehicle light, comprising a light guide 3 fixing structure as described above.

[0045] In summary, this invention utilizes the flat positioning block 32 at the light-inlet end of the light guide 3 to achieve one-time positioning with the light source 51, avoiding deviations in the light source 51 caused by assembly errors. The effective design of the flat positioning block 32 also avoids the heat risk caused by refraction of the light source 51 at the light-inlet end of the light guide 3, effectively improving the lifespan of the lamp. The enclosure of the light guide 3 by the bracket 1 and cover plate 2, and the staggered structure formed by the bracket 1, cover plate 2, and housing 4 through the baffles, also avoid the risk of light leakage, making the fixation of the light guide 3 more reliable.

[0046] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A light guide fixing structure, characterized in that, include: The components include a bracket (1), a cover plate (2), a light guide (3), a housing (4), a circuit board (5), and a heat sink (6). The radiator (6) is mounted on the housing (4), and a first positioning post (61) is provided on the radiator (6). The circuit board (5) is mounted on the radiator (6), and a first positioning hole (52) is provided on the circuit board (5) for the first positioning post (61) to pass through. A light source (51) is provided on the circuit board (5). The bracket (1) and the cover plate (2) together form an installation channel, and both the bracket (1) and the cover plate (2) are installed on the housing (4); The light guide (3) is disposed in the installation channel. The light-incident end of the light guide (3) extends into the housing (4) and is disposed close to the light source (51). A second positioning hole is provided on the light-incident end of the light guide (3) for the first positioning post (61) to pass through.

2. The optical guide fixing structure as described in claim 1, characterized in that, The light guide (3) has a flat plate positioning block (32) at its light-incident end, and the flat plate positioning block (32) has a second positioning hole.

3. The optical guide fixing structure as described in claim 2, characterized in that, The flat positioning block (32) is provided with a light-incident surface (321), which is positioned directly opposite the light source (51) and parallel to the light source (51). The flat positioning block (32) is provided with a top rib (324), which protrudes from the light-incident surface (321) and the end face of the top rib (324) abuts against the circuit board (5).

4. The optical guide fixing structure as described in claim 1, characterized in that, The housing (4) has a mounting hole (44) for the light-inlet end of the light guide (3) to extend into. A first baffle (42) is provided around the opening of the mounting hole (44) facing the bracket (1) and the cover plate (2). A second baffle (12) is provided on one end of the bracket (1) and a third baffle (22) is provided on one end of the cover plate (2). The second baffle (12) covers the lower end of the first baffle (42) and the third baffle (22) covers the upper end of the first baffle (42).

5. The optical guide fixing structure as described in claim 1, characterized in that, The other end of the bracket (1) is provided with a first light-blocking strip (14), and the other end of the cover plate (2) is provided with a second light-blocking strip (23). The first light-blocking strip (14) and the second light-blocking strip (23) together form the installation channel.

6. The optical guide fixing structure as described in claim 1, characterized in that, The light guide (3) has a second positioning post (31) on its upper and lower sides respectively. The inner wall of the bracket (1) has a positioning groove (11) for inserting one of the second positioning posts (31). The inner wall of the cover plate (2) has a positioning groove (21) for inserting another second positioning post (31).

7. The optical guide fixing structure as described in claim 1, characterized in that, A sealing ring (64) is provided on the radiator (6), and the sealing ring (64) is located at the connection between the radiator (6) and the housing (4).

8. The optical guide fixing structure as described in claim 1, characterized in that, The heat sink (6) is connected to the circuit board (5) by a first screw post (62), and the heat sink (6) is connected to the housing (4) by a second screw post (43).

9. The optical guide fixing structure as described in claim 1, characterized in that, Both the bracket (1) and the cover plate (2) are connected to the housing (4) by a third screw post (13).

10. A vehicle light, characterized in that, Includes a light guide fixing structure as described in any one of claims 1 to 9.

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