High-efficiency heat dissipation structure of LED (light-emitting diode) on car lamp circuit board

Abstract

The utility model relates to the technical field of car lamp circuit boards, in particular to an efficient heat dissipation structure of an LED on a car lamp circuit board, which comprises a circuit board body, two ends of the circuit board body are respectively mounted on two mounting seats through fixing structures, and the two ends of the circuit board body are fixedly connected with fixing blocks. A clamping groove is formed in the fixing block, clamping blocks are slidably connected to the two mounting bases, the ends of the clamping blocks are clamped with the clamping groove, tension springs are fixedly connected between the mounting bases and the clamping blocks, a plurality of LED lamps are mounted on the circuit board body, two rows of flow guide holes are formed in the circuit board body, the flow guide holes are obliquely formed, and the flow guide holes are arranged in the circuit board body. A cooling fin is mounted at the bottom end of the circuit board body, and the two ends of the cooling fin abut against the two mounting bases respectively; the anti-seismic performance of circuit board installation and the stability of connection between the circuit board body and the cooling fins are improved, and installation and disassembly are convenient.

Description

Technical Field

[0001] This utility model relates to a high-efficiency heat dissipation structure, specifically a high-efficiency heat dissipation structure for LEDs on a vehicle lighting circuit board, belonging to the field of vehicle lighting circuit board technology. Background Technology

[0002] The headlight circuit board is a core electronic component in the automotive lighting system, used to control and drive the operation of the headlights. It is usually composed of a printed circuit board, electronic components, and a heat dissipation structure. To solve the heat dissipation problem of LEDs on the headlight circuit board and ensure the stable operation and long service life of the LEDs, a comprehensive heat dissipation structure combining passive and active heat dissipation is usually adopted.

[0003] However, traditional automotive lighting circuit boards are usually fixed inside the lighting housing with bolts. During vehicle operation, continuous vibrations are generated. The high rigidity of the bolt connection will directly transmit the vibration to the circuit board, which can easily cause resonance or stress concentration, accelerate component fatigue, and affect the stability of the connection between the circuit board and the heat sink. Furthermore, when the heat dissipation structure of the circuit board and the LED is damaged and needs to be disassembled for maintenance, repeated disassembly can damage the threads and affect the stability of the circuit board for secondary installation. Utility Model Content

[0004] The purpose of this invention is to provide an efficient heat dissipation structure for LEDs on a vehicle headlight circuit board in order to solve the above problems. This structure improves the shock resistance of the circuit board installation and the stability of the connection between the circuit board body and the heat sink, and is convenient for installation and disassembly.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board, comprising a circuit board body, the two ends of which are respectively mounted on two mounting seats via a fixing structure, the fixing structure including fixing blocks, fixing blocks fixedly connected to both ends of the circuit board body, the fixing blocks having slots, and locking blocks slidably connected to both mounting seats, the ends of the locking blocks engaging with the slots, a tension spring fixedly connected between the mounting seats and the locking blocks, multiple LEDs mounted on the circuit board body, two rows of guide holes being provided on the circuit board body, the guide holes being inclined, and a heat sink mounted at the bottom of the circuit board body, the two ends of the heat sink abutting against the two mounting seats respectively.

[0006] Preferably, the end of the card block has a beveled structure, and the overall cross-section of the card block has a "U" shape.

[0007] Preferably, the card block has a groove, which is hexagonal in shape.

[0008] Preferably, a top block is slidably connected inside the mounting base, and the top block abuts against the fixing block.

[0009] Preferably, a spring is fixedly connected between the top block and the mounting base, and the sliding directions of the top block and the locking block are perpendicular to each other.

[0010] Preferably, a guide rod is fixedly connected to the bottom end of the top block, and the guide rod is slidably connected to the mounting base.

[0011] Preferably, the guide rod has a "T" shaped cross-section, and the end of the fixing block has an inclined surface structure.

[0012] Preferably, a thermally conductive adhesive coating is applied between the circuit board body and the heat sink, and a heat dissipation coating is applied to the top surface of the circuit board body.

[0013] The beneficial effects of this utility model are as follows: the two ends of the circuit board body are respectively mounted on two mounting bases through a fixing structure. A fixing block is fixedly connected to each end of the circuit board body, and a slot is provided on the fixing block. A locking block is slidably connected to each of the two mounting bases, and the end of the locking block engages with the slot. A tension spring is fixedly connected between the mounting base and the locking block. Two rows of guide holes are provided on the circuit board body, and the guide holes are inclined. A heat sink is installed at the bottom of the circuit board body, and the two ends of the heat sink abut against the two mounting bases respectively. The elastic engagement of the slot on the fixing block and the locking block on the mounting base enables quick installation and removal of the circuit board body. This also improves the shock resistance of the circuit board installation and the stability of the connection between the circuit board body and the heat sink. Furthermore, the inclined guide holes and the heat sink at the bottom of the circuit board body work together to achieve efficient heat dissipation through a combined airflow guidance and heat conduction mechanism. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure between the circuit board body and the fixing block of this utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the fixing block and the top block of this utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure between the circuit board body and the LED lamp of this utility model.

[0018] In the diagram: 1. Circuit board body; 2. LED light; 3. Air guide hole; 4. Heat sink; 5. Mounting base; 6. Fixing structure; 601. Fixing block; 602. Slot; 603. Block; 604. Tension spring; 605. Groove; 606. Top block; 607. Spring; 608. Guide rod; 7. Thermally conductive adhesive coating; 8. Heat dissipation coating. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 As shown, a high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board includes a circuit board body 1. The two ends of the circuit board body 1 are respectively mounted on two mounting seats 5 via a fixing structure 6. The fixing structure 6 includes a fixing block 601, and both ends of the circuit board body 1 are fixedly connected to the fixing block 601. A slot 602 is provided on the fixing block 601. A locking block 603 is slidably connected to each of the two mounting seats 5. The end of the locking block 603 engages with the slot 602. A tension spring 604 is fixedly connected between the mounting seat 5 and the locking block 603. The end of the locking block 603 has a beveled structure, and the overall cross-section of the locking block 603 is U-shaped. Multiple LEDs 2 are mounted on the circuit board body 1. Two rows of guide holes 3 are provided on the circuit board body 1, and the guide holes 3 are inclined. A heat sink 4 is mounted at the bottom of the circuit board body 1, and both ends of the heat sink 4 abut against the two mounting seats 5 respectively.

[0021] As a technical optimization of this utility model, the locking block 603 is provided with a groove 605, which has a hexagonal structure; this facilitates the sliding of the locking block 603 by using a hexagonal wrench.

[0022] As a technical optimization of this utility model, a top block 606 is slidably connected inside the mounting base 5. The top block 606 abuts against the fixing block 601. A spring 607 is fixedly connected between the top block 606 and the mounting base 5. The sliding directions of the top block 606 and the locking block 603 are perpendicular to each other. When it is necessary to disassemble the circuit board body 1, a hexagonal wrench is inserted into one of the grooves 605 and pushed away from the slot 602 to make the locking block 603 no longer engage with the slot 602, thereby quickly releasing the limitation on the fixing block 601. At this time, the spring 607 resets and drives the top block 606 to push the fixing block 601 upward, so that the slot 602 on the fixing block 601 and the locking block 603 are misaligned and cannot engage. Then, the same method is used to release the limitation on the other end of the circuit board body 1 and the fixing block 601 at the other end, thereby facilitating the disassembly of the circuit board body 1 and improving the convenience of operation.

[0023] As a technical optimization of this utility model, a guide rod 608 is fixedly connected to the bottom end of the top block 606. The guide rod 608 is slidably connected to the mounting base 5. The cross-section of the guide rod 608 is a "T" shape, and the end of the fixing block 601 is a beveled structure. When the top block 606 slides in the mounting base 5, it drives the guide rod 608 to slide in the mounting base 5, which guides the top block 606 and ensures that the top block 606 moves linearly. The "T" shape of the guide rod 608 can prevent the top block 606 from falling out of the mounting base 5.

[0024] As a technical optimization of this utility model, a thermally conductive adhesive coating 7 is coated between the circuit board body 1 and the heat sink 4, and a heat dissipation coating 8 is coated on the top surface of the circuit board body 1; the heat dissipation coating 8 is sprayed on the surface of the circuit board body 1, and the heat dissipation coating 8 adopts graphene or nano carbon heat dissipation coating to enhance the heat radiation capability and accelerate the dissipation of heat to the surrounding environment. The setting of the thermally conductive adhesive coating 7 improves the heat conduction effect between the circuit board body 1 and the heat sink 4.

[0025] In use, the fixing blocks 601 at both ends of the circuit board body 1 are first moved into the mounting base 5. When the fixing blocks 601 approach the locking block 603, the fixing blocks 601 slide outward against the locking block 603. At the same time, the locking block 603 extends against the tension spring 604. The fixing blocks 601 continue to move inward into the mounting base 5, causing the fixing blocks 601 to slide downward against the top block 606. The top block 606 retracts against the spring 607, causing the heat sink 4 to contact the mounting base 5. When the slot 602 aligns with the locking block 603, the tension spring 604... The reset and drive mechanism 603 to engage with the slot 602, thereby quickly completing the installation of the circuit board body 1 and making its installation convenient. The elastic engagement of the block 603 with the slot 602 improves the shock resistance of the circuit board body 1 after installation and the stability of the connection between the circuit board body 1 and the heat sink 4. When the circuit board body 1 is damaged and needs to be disassembled for repair, a hexagonal wrench is inserted into one of the grooves 605 and pushed away from the slot 602, causing the block 603 to disengage from the slot 602. This quickly releases the restriction on the fixing block 601. At this time, the spring 607 resets and drives the top block 606 to push the fixing block 601 upward, causing the slot 602 on the fixing block 601 to misalign with the slot 603 and unable to engage. Then, the same method is used to release the restriction on the fixing block 601 at the other end of the circuit board body 1, thereby facilitating the disassembly of the circuit board body 1 and improving the ease of operation. When the vehicle lights are working, the LED lights 2 generate heat. The inclined guide hole 3 works in conjunction with the heat sink 4 at the bottom of the circuit board body 1 to allow air to pass through. The combined mechanism of flow guidance and heat conduction achieves efficient heat dissipation, and the heat sink 4 and the mounting base 5 directly contact each other to form a secondary heat dissipation path. When the temperature of the heat sink 4 exceeds the threshold, the mounting base 5 can act as an auxiliary heat sink to conduct heat to the headlight housing, thereby improving the heat dissipation effect of the LED light 2. A heat dissipation coating 8 is sprayed on the surface of the circuit board body 1. The heat dissipation coating 8 adopts graphene or nano carbon heat dissipation coating to enhance the heat radiation capability and accelerate the dissipation of heat to the surrounding environment. The setting of the thermally conductive adhesive coating 7 improves the thermal conductivity between the circuit board body 1 and the heat sink 4.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board, comprising a circuit board body (1), characterized in that: The two ends of the circuit board body (1) are respectively mounted on two mounting bases (5) by a fixing structure (6). The fixing structure (6) includes a fixing block (601). The two ends of the circuit board body (1) are fixedly connected to the fixing block (601). The fixing block (601) has a slot (602). The two mounting bases (5) are slidably connected to the slots (603). The end of the slot (603) engages with the slot (602). A tension spring (604) is fixedly connected between the mounting base (5) and the slot (603). The circuit board body (1) is equipped with multiple LED lights (2). The circuit board body (1) has two rows of guide holes (3). The guide holes (3) are inclined. The bottom of the circuit board body (1) is equipped with a heat sink (4). The two ends of the heat sink (4) abut against the two mounting bases (5) respectively.

2. The high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board according to claim 1, characterized in that: The end of the card block (603) has a beveled structure, and the overall cross-section of the card block (603) has a "U" shaped structure.

3. The high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board according to claim 2, characterized in that: The card block (603) has a groove (605) which is hexagonal in shape.

4. The high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board according to claim 1, characterized in that: A top block (606) is slidably connected inside the mounting base (5), and the top block (606) abuts against the fixing block (601).

5. The high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board according to claim 4, characterized in that: A spring (607) is fixedly connected between the top block (606) and the mounting base (5), and the sliding directions of the top block (606) and the locking block (603) are perpendicular to each other.

6. The high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board according to claim 5, characterized in that: The bottom end of the top block (606) is fixedly connected to a guide rod (608), and the guide rod (608) is slidably connected to the mounting base (5).

7. The high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board according to claim 6, characterized in that: The guide rod (608) has a "T" shaped cross section, and the end of the fixing block (601) has a beveled structure.

8. The high-efficiency heat dissipation structure for LEDs on a vehicle headlight circuit board according to claim 1, characterized in that: A thermally conductive adhesive coating (7) is applied between the circuit board body (1) and the heat sink (4), and a heat dissipation coating (8) is applied to the top surface of the circuit board body (1).

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