PCB (printed circuit board) structure with detachable fins for car lamp
By using a T-shaped groove and T-shaped head sliding groove structure to connect the fins to the PCB board in the vehicle light and using thermally conductive adhesive to fasten them, the problems of robustness and interface thermal resistance of the existing vehicle light heat dissipation structure are solved, achieving efficient heat dissipation and flexible layout, and improving the heat dissipation performance and space utilization of the vehicle light.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUNCHI VEHICLE IND JIANGSU
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-24
AI Technical Summary
Existing automotive headlight heat dissipation structures are inadequate in terms of robustness and interfacial thermal resistance at the contact point between the fins and the PCB board. Furthermore, existing detachable structures are complex to manufacture and lack flexibility.
The fins are connected to the PCB board using a sliding groove structure with T-shaped grooves and T-shaped heads, and then secured with thermally conductive adhesive. The fins are arranged in an array at equal intervals on the PCB board. The thermally conductive adhesive reduces the interfacial thermal resistance, and heat dissipation is achieved through the high thermal conductivity and good contact area of the fins.
It achieves a compact structure, convenient assembly and disassembly, and safety and reliability, improves heat dissipation efficiency and space utilization, reduces costs, enhances the flexibility of heat dissipation layout, and avoids the problem of detachment caused by unstable welding.
Smart Images
Figure CN224162477U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, and in particular to a PCB board structure with detachable fins for automotive lights. Background Technology
[0002] Existing technologies have adopted various technical measures to solve the problem of heat dissipation in vehicle lights, including:
[0003] Option 1, a finned vehicle headlight structure (CN207555497), involves tightly connecting the folded U-shaped fins to the back of the heat sink base plate with rivets. The rivet method increases the number of holes on the PCB board, which is not conducive to the arrangement of heat-generating components and circuit routing.
[0004] Option 2, a detachable fin (CN222481231), is characterized by a mounting plate at the bottom of the fin, with insertion holes on both sides of the mounting plate and corresponding insertion holes on the bottom of the base. This detachable heat dissipation structure has a complex process, a simple fin structure, and is not flexible in terms of process application.
[0005] The existing mainstream technologies for heat dissipation of automotive lights all still have the following technical problems:
[0006] 1. The connection structure is somewhat lacking in robustness;
[0007] 2. There will be interfacial thermal resistance at the contact point between the fins and the PCB board; Utility Model Content
[0008] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a PCB board structure with detachable fins for automotive lights, thereby solving these problems.
[0009] The technical solution adopted in this utility model is as follows:
[0010] A PCB board structure with detachable fins for automotive lights includes a heating element, a PCB board, and fins. The heating element is mounted on the upper part of the PCB board, and a connecting groove is provided on the lower part. The ends of the fins correspond to the connecting grooves of the PCB board and are provided with connectors. The fins are fixedly connected to the PCB board through the aforementioned sliding groove structure.
[0011] The connecting groove of the PCB board is a T-shaped groove, and its side or cross-section is T-shaped. The connector of the fin is a T-shaped head, and its side or cross-section is T-shaped. It is fixedly connected to the PCB board through the above-mentioned sliding groove structure.
[0012] The PCB board's connecting slot is snapped into the fin's connector.
[0013] The connection between the connecting groove of the PCB board and the connector of the fin is fastened with thermally conductive adhesive.
[0014] The fins are arranged in an equally spaced array on the PCB board.
[0015] The PCB board is an AL substrate.
[0016] The PCB board is an FR4 double-layer board.
[0017] The fins are made of steel, copper, or aluminum.
[0018] This utility model relates to a PCB board structure with detachable fins for automotive lights. It features a scientific design, simple and compact structure, convenient disassembly and assembly, safe and reliable operation, material savings, increased flexibility in heat dissipation layout, improved utilization of space in automotive lights or other electronic components, enhanced heat dissipation efficiency, and is economical and durable. Attached Figure Description
[0019] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.
[0020] Figure 1 This is a schematic diagram of the installation of the heating element with detachable fins on the PCB board structure for automotive lights according to this utility model;
[0021] Figure 2 for Figure 1 A top-down view;
[0022] Wherein: 1-Heating element; 2-PCB board; 3-Fins. Detailed Implementation
[0023] like Figure 1 As shown, this utility model includes a heating element 1, a PCB board 2, and fins 3. The PCB board 2 is an AL substrate (aluminum substrate) or an FR4 double-layer board. The heating element 1 (LED light-emitting element or electronic component) is mounted on the upper part and is soldered onto the PCB board 2. A connecting groove is provided at the lower part. In this embodiment, the connecting groove of the PCB board 2 is a T-shaped groove, and its side or cross-section is T-shaped. The fins 3 are sheet-like bodies with a certain uniform thickness. One end of the fin corresponds to the connecting groove of the PCB board 2 and is provided with a connector. In this embodiment, the connector of the fin 3 is a T-shaped head, and its side or cross-section is T-shaped. To facilitate the disassembly and assembly of the fins 3, the connecting groove on the PCB board 2 is a through groove. The fins 3 are fixedly connected to the PCB board 2 through the above-mentioned sliding groove structure. In this embodiment, the fins 3 are made of steel, copper, or aluminum. The number of fins 3 is determined according to the heat dissipation requirements. The fins 3 are generally arranged in an equally spaced array on the PCB board 2.
[0024] This embodiment is based on finned technology. The core technology is that the sliding groove structure between the PCB board 2 and the fins 3 achieves structural snap-fit fixation, or the thermally conductive adhesive is used for fastening. The thermally conductive adhesive can reduce heat transfer loss caused by interface thermal resistance. The PCB board 2 transfers the heat of the heat-generating component 1 to the fins 3 through thermal conduction. With the high thermal conductivity and good contact area of the fins 3, the heat accumulation on the PCB board 2 is reduced by using heat conduction and heat convection to dissipate heat, thereby increasing the heat dissipation performance of the LED light-emitting components or electronic components and improving optical efficiency or working stability.
[0025] This utility model also includes the following beneficial technical effects:
[0026] 1. Different specifications of fins can be selected according to the heat source with different power and the space structure requirements of the car headlight, without the need to frequently replace the PCB.
[0027] 2. Compared to die-cast radiators, its detachable design allows for easy modification of fin shape and size without requiring a complete replacement;
[0028] 3. Due to manufacturing process issues, the contact area between the die-cast integrated heat sink and the PCB board is uneven, which greatly reduces the heat dissipation efficiency of the heat sink. The use of the new sliding groove structure can effectively avoid this problem, reduce costs, and simplify the process.
[0029] 4. The fin orientation can be adjusted freely by opening a groove structure on the PCB board, which facilitates promotion and use;
[0030] 5. Avoid using conventional welding studs for fixing connections, as they may melt and fall off due to unstable heating.
[0031] 6. Easy to assemble and disassemble, saves materials, and increases the flexibility of heat dissipation layout;
[0032] 7. Improved the utilization rate of space structure for vehicle lights or other electronic components.
[0033] The above description is only a general embodiment of this utility model. For those skilled in the art, there are various other embodiments with modifications and variations, which will not be elaborated here. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model are included within the protection scope claimed by this utility model.
Claims
1. A PCB board structure with detachable fins for automotive lights, comprising a heating element (1), a PCB board (2), and fins (3), characterized in that, The PCB board (2) has a heating element (1) installed on the upper part and a connecting groove on the lower part. The end of the fin (3) corresponds to the connecting groove of the PCB board (2) and has a connector. It is fixedly connected to the PCB board (2) through the above-mentioned sliding groove structure.
2. The PCB board structure with detachable fins for automotive lights according to claim 1, characterized in that, The connecting groove of the PCB board (2) is a T-shaped groove, and its side or cross-section is T-shaped. The connecting head of the fin (3) is a T-shaped head, and its side or cross-section is T-shaped. It is fixedly connected to the PCB board (2) through the above-mentioned sliding groove structure.
3. A PCB board structure with detachable fins for automotive lights according to claim 1 or 2, characterized in that, The connecting groove of the PCB board (2) is snapped into the connector of the fin (3).
4. A PCB board structure with detachable fins for automotive lights according to claim 1 or 2, characterized in that, The connection between the connecting groove of the PCB board (2) and the connector of the fin (3) is fastened with thermally conductive adhesive.
5. The PCB board structure with detachable fins for automotive lights according to claim 1, characterized in that, The fins (3) are arranged in an equally spaced array on the PCB board (2).
6. The PCB board structure with detachable fins for automotive lights according to claim 1, characterized in that, The PCB board (2) is an AL substrate.
7. The PCB board structure with detachable fins for automotive lights according to claim 1, characterized in that, The PCB board (2) is an FR4 double-layer board.
8. The PCB board structure with detachable fins for automotive lights according to claim 1, characterized in that, The fins (3) are made of steel, copper or aluminum.