Cooling device for headlamp module circuit board

Abstract

The invention discloses a cooling device for a headlamp module circuit board, and belongs to the technical field of circuit board manufacturing equipment.The cooling device comprises a heat dissipation box, a cover plate is hinged to the top of the heat dissipation box, a plurality of fans are installed on the cover plate, a pneumatic spring is installed between the cover plate and the heat dissipation box, two bearing frames are arranged in the heat dissipation box, and the two bearing frames are arranged in the heat dissipation box. The bearing frame comprises bearing plates, the side faces of the bearing plates can be attached to the side faces of the circuit boards, conveying belts used for conveying the circuit boards are arranged on the opposite inner sides of the two bearing plates correspondingly, and the two bearing plates are a movable plate and a fixed plate fixed in the heat dissipation box correspondingly. Two first screw rods are rotationally installed in the heat dissipation box, two movable seats are fixed to the bottom of the movable plate, the peripheries of the first screw rods are sleeved with the movable seats, and the movable seats are in threaded transmission fit with the first screw rods. The cooling device has the effect of being high in cooling efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of circuit board manufacturing equipment, and in particular to a cooling device for a headlight module circuit board. Background Art

[0002] With the continuous advancement of automotive technology, the complexity and functional requirements of automotive headlight modules are also increasing. Modern automotive headlight modules must not only provide basic lighting functions but also integrate multiple intelligent features such as Adaptive Lighting Systems (AFS), Automatic High Beams (AHB), and Matrix LED headlights. The realization of these functions relies on high-performance electronic circuit boards.

[0003] With the continuous advancement of electronic technology and the increasing complexity of integrated circuits, the manufacturing processes of electronic products are becoming increasingly sophisticated. Among these manufacturing processes, reflow soldering is a crucial step in electronic assembly and is widely used in surface mount technology (SMT). The reflow soldering process melts the solder through heat, forming a connection between electronic components and the circuit board. During this process, the temperature of the circuit board typically rises to a high level. To ensure soldering quality and avoid component damage or circuit board deformation caused by overheating, the circuit board temperature needs to be lowered. Existing technologies typically use natural cooling, which is inefficient. Summary of the Invention

[0004] In order to improve the problem of low cooling efficiency of a circuit board, the present application provides a cooling device for a circuit board of a headlight module.

[0005] The present application provides a cooling device for a headlight module circuit board using the following technical solutions: A cooling device for a circuit board of a headlight module comprises a heat dissipation box, a cover plate hinged on the top of the heat dissipation box, a plurality of fans mounted on the cover plate, a pneumatic spring mounted between the cover plate and the heat dissipation box, two supporting frames arranged in the heat dissipation box, the supporting frames comprising a supporting plate, the side faces of the supporting plate being capable of fitting with the side faces of the circuit board, a conveyor belt for conveying the circuit board being arranged on the opposite inner sides of the two supporting plates, the two supporting plates being respectively a movable plate and a fixed plate fixed in the heat dissipation box, two screw rods being rotatably mounted in the heat dissipation box, two movable seats being fixed on the bottom of the movable plate, the movable seat being sleeved on the outer periphery of the screw rod, and the movable seat being engaged with the screw rod in threaded transmission.

[0006] By adopting the above technical solution, the position of the movable plate can be adjusted by rotating screw 1 so that the spacing between the movable plate and the fixed plate is the same as the width of the circuit board. The circuit board moves along the length direction of the heat dissipation box under the action of the conveyor belt, so that the fan can cool the circuit board, and the cooling efficiency is high.

[0007] Preferably, a synchronous wheel is fixedly mounted on the outer periphery of the screw rods 1, and a synchronous belt is mounted on the outer periphery of the two synchronous wheels. A motor 1 is mounted on the heat dissipation box, and the output end of the motor 1 is coaxially fixedly connected to the end of one of the screw rods 1.

[0008] By adopting the above technical solution, the motor 1 is started, and the motor 1 drives the two screws 1 to rotate synchronously through the synchronous wheel and the synchronous belt, thereby adjusting the position of the movable plate.

[0009] Preferably, a dust cover is fixed on the top of the heat dissipation box, an air inlet is opened on the side of the dust cover, a dust filter plate is rotatably installed in the air inlet, two connecting plates are fixed on the side of the heat dissipation box, positioning plates are fixed on the ends of the two connecting plates away from the heat dissipation box, a cleaning brush is slidably installed between the two connecting plates along their own length direction, and a rotating component for pushing the dust filter plate to rotate downward is provided on the dust cover.

[0010] By adopting the above technical solution, the outside air enters the dust cover through the dust filter plate, and the dust filter plate filters the dust in the air, so that when the fan blows air to cool the circuit board, the dust is not easy to fall on the circuit board. The rotating component is used to push the dust filter plate to rotate downward, and the cleaning brush can clean the dust accumulated on the dust filter plate.

[0011] Preferably, sliding grooves are respectively provided on the opposite inner sides of the two connecting plates, and the connecting plates are slidably installed with sliding blocks along their own length directions through the sliding grooves, and the cleaning brush is rotatably installed between the two sliding blocks, and a second screw is rotatably installed in one of the sliding grooves, and the second screw is threadedly matched with the sliding block, and a second motor is fixed on the connecting plate, and the output end of the second motor is fixedly connected to the end of the second screw.

[0012] By adopting the above technical solution, motor 2 is started, motor 2 drives screw 2 to rotate, screw 2 drives the sliding block to move in the sliding groove, and then drives the cleaning brush to move along the length direction of the connecting plate, so that the cleaning brush can clean the dust filter plate.

[0013] Preferably, rotating cylinders are rotatably installed on the relative inner sides of the air inlet, slots are respectively provided on both sides of the dust filter plate, and the dust filter plate is slidably installed with plug-in blocks along its own length direction through the slots, and the end faces of the rotating cylinders are provided with plug-in grooves for inserting the plug-in blocks.

[0014] By adopting the above technical solution, the plug block is inserted into the plug slot of the rotating cylinder, so that the dust filter plate is clamped and fixed to the rotating cylinder. When the dust filter plate needs to be replaced, the plug block is separated from the plug slot for easy disassembly.

[0015] Preferably, a slider is fixed to the side of the insert block, and a sliding groove is provided on the inner wall of the slot. The slider slides and cooperates with the dust filter plate along the length direction of the dust filter plate through the sliding groove. A sliding spring is fixed to the side of the slider away from the rotating cylinder, and one end of the sliding spring away from the slider is fixedly connected to the inner wall of the sliding groove.

[0016] By adopting the above technical solution, after the insert block is aligned with the insert slot, the insert block is inserted into the insert slot under the elastic force of the sliding spring, so that the connection between the dust filter plate and the rotating cylinder is more stable.

[0017] The top surface of the sliding block is fixed with a support rod, and the support rod is fixed with a push rod near the side of the rack, and the push rod can abut against the rack. The top surface of the connecting plate is provided with a clearance groove, and the support rod slides with the connecting plate along the length direction of the connecting plate through the clearance groove.

[0018] By adopting the above technical solution, when the sliding block moves in the direction away from the dust filter plate, the sliding block drives the pushing rod to move synchronously, and the rack moves in the direction close to the positioning plate under the elastic force of the driving spring, and the rack drives the gear to rotate, and the gear drives the rotating cylinder to rotate through the rotating rod, thereby driving the dust filter plate to flip downward, so that the cleaning brush can clean the dust filter plate; when the sliding block moves in the direction close to the dust filter plate, the pushing rod pushes the rack to move in the direction close to the driving spring, and the rack drives the gear to rotate in the opposite direction, thereby driving the dust filter plate to rotate upward and reset.

[0019] Preferably, the dust filter plate is provided with an abutment groove on the side away from the connecting plate, and the dust filter plate is slidably installed with an abutment block along its own thickness direction through the abutment groove, and the side of the insertion block is provided with a connecting groove for passing the abutment block, and the connecting groove is provided with a slope 1 away from the inner wall of the rotating cylinder, and the side of the abutment block close to the abutment block is provided with a slope 2, and the slope 2 can abut against the slope 1.

[0020] By adopting the above technical solution, the abutment block is pushed toward the insertion block, and the inclined surface one and inclined surface two abut against each other, so that the insertion block moves toward the direction away from the rotating cylinder, so that the insertion block is disengaged from the insertion slot, so as to facilitate the removal of the dust filter plate.

[0021] Preferably, a limiting block is fixed on the side of the abutment block, and a limiting groove is also provided on the inner wall of the abutment groove. The limiting block slides and cooperates with the dust filter plate along the thickness direction of the dust filter plate through the limiting groove. The limiting block is fixed with a limiting spring close to the side of the insert block, and the end of the limiting spring away from the limiting block is fixedly connected to the inner wall of the limiting groove.

[0022] By adopting the above technical solution, after the abutting block is released, the abutting block moves in a direction away from the insertion block and resets under the elastic force of the limit spring.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. By turning screw 1, the position of the movable plate can be adjusted so that the distance between the movable plate and the fixed plate is the same as the width of the circuit board. The circuit board moves along the length direction of the heat dissipation box under the action of the conveyor belt, so that the fan can cool the circuit board, and the cooling efficiency is high; 2. Insert the plug into the slot of the rotating cylinder to secure the dust filter plate to the rotating cylinder. When the dust filter plate needs to be replaced, remove the plug from the slot for easy disassembly. 3. When the sliding block moves in the direction away from the dust filter plate, the sliding block drives the push rod to move synchronously, and the rack moves in the direction close to the positioning plate under the elastic force of the driving spring. The rack drives the gear to rotate, and the gear drives the rotating cylinder to rotate through the rotating rod, thereby driving the dust filter plate to flip downward so that the cleaning brush can clean the dust filter plate; when the sliding block moves in the direction close to the dust filter plate, the push rod pushes the rack to move in the direction close to the driving spring, and the rack drives the gear to rotate in the opposite direction, thereby driving the dust filter plate to rotate upward and reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the cooling device for the headlight module circuit board according to an embodiment of the present application.

[0025] Figure 2 It is a structural schematic diagram of the dust filter plate in the cooling device for the headlight module circuit board according to an embodiment of the present application.

[0026] Figure 3 This is a cross-sectional view of a dust filter plate in a cooling device for a headlight module circuit board according to an embodiment of the present application.

[0027] Figure 4It is a structural schematic diagram of the insert block and the abutment block in the cooling device for the headlight module circuit board according to an embodiment of the present application.

[0028] Figure 5 This is a cross-sectional view of a dust cover in a cooling device for a headlight module circuit board according to an embodiment of the present application.

[0029] Figure 6 yes Figure 5 Enlarged schematic diagram of point A in the middle.

[0030] Figure 1: Radiator; 11: Cover; 12: Fan; 13: Pneumatic spring; 2: Carrier; 21: Carrier plate; 211: Movable plate; 212: Fixed plate; 22: Conveyor belt; 23: Screw rod 1; 24: Movable seat; 25: Synchronous wheel; 26: Synchronous belt; 27: Motor 1; 3: Dust cover; 31: Air inlet; 32: Rotating cylinder; 33: Plug slot; 4: Dust filter plate; 41: Slot; 42: Insert block; 43: Slider; 44: Slide slot; 45: Slide Shift spring; 46, connecting groove; 461, inclined plane 1; 5, connecting plate; 51, positioning plate; 52, cleaning brush; 53, sliding groove; 54, sliding block; 55, screw rod 2; 56, motor 2; 57, giving way groove; 58, support rod; 59, push rod; 6, rotating rod; 61, gear; 62, rack; 63, driving groove; 64, driving spring; 7, abutment block; 71, inclined plane 2; 72, abutment groove; 73, limit block; 74, limit groove; 75, limit spring. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 This application is described in further detail.

[0032] The embodiment of the present application discloses a cooling device for a headlight module circuit board. Figure 1 The cooling device for the circuit board of the headlight module includes a heat dissipation box 1, and a cover plate 11 is hinged on the top of the heat dissipation box 1. A pneumatic spring 13 is installed between the cover plate 11 and the heat dissipation box 1, and a number of fans 12 are installed on the cover plate 11. Two supporting frames 2 are arranged in the heat dissipation box 1. The supporting frames 2 include a supporting plate 21. The side of the supporting plate 21 can fit with the side of the circuit board. The opposite inner sides of the two supporting plates 21 are provided with a conveyor belt 22 for conveying the circuit board. The two supporting plates 21 are respectively a movable plate 211 and a fixed plate 212 fixed in the heat dissipation box 1. Two movable seats 24 are fixed to the bottom of the movable plate 211. Two screw rods 23 are rotatably installed in the heat dissipation box 1. The movable seat 24 is sleeved on the outer periphery of the screw rod 23, and the movable seat 24 is threadedly matched with the screw rod 23. The outer periphery of the screw rod 23 is sleeved and fixed with a synchronous wheel 25, and the outer periphery of the two synchronous wheels 25 is sleeved with a synchronous belt 26. A motor 27 is mounted on the heat dissipation box 1 , and an output end of the motor 27 is coaxially fixedly connected to an end of one of the screw rods 23 .

[0033] Start the motor 27, which drives the two screws 23 to rotate synchronously through the synchronous wheel 25 and the synchronous belt 26. The position of the movable plate 211 can be adjusted so that the spacing between the movable plate 211 and the fixed plate 212 is the same as the width of the circuit board. The circuit board moves along the length direction of the heat dissipation box 1 under the action of the conveyor belt 22, so that the fan 12 can cool the circuit board, and the cooling efficiency is high.

[0034] Reference Figure 1 and Figure 2 A dust cover 3 is fixed to the top of the heat sink 1. An air inlet 31 is formed on the side of the dust cover 3. A dust filter plate 4 is rotatably mounted in the air inlet 31. Outside air enters the dust cover 3 through the dust filter plate 4, which filters dust in the air. This prevents dust from settling on the circuit board when the fan 12 blows air to cool it.

[0035] Reference Figure 3 and Figure 4 Sockets 41 are provided on either side of the dust filter plate 4, through which insert blocks 42 are slidably mounted along the length of the dust filter plate 4. Rotating cylinders 32 are rotatably mounted on the opposite inner sides of the air inlet 31, and the end faces of the rotating cylinders 32 are provided with insertion slots 33 for inserting the insert blocks 42. Slide blocks 43 are fixed to the sides of the insert blocks 42, and slots 44 are provided on the inner walls of the sockets 41. Slide blocks 43 slide along the length of the dust filter plate 4 through the slots 44. A sliding spring 45 is fixed to the side of the slider 43 away from the rotating cylinder 32, and the end of the sliding spring 45 away from the slider 43 is fixedly connected to the inner wall of the slot 44.

[0036] Reference Figure 3 and Figure 4 The dust filter plate 4 is provided with an abutment groove 72 on the side away from the connecting plate 5. The dust filter plate 4 is slidably mounted with an abutment block 7 through the abutment groove 72 in the thickness direction thereof. A limit block 73 is fixed to the side of the abutment block 7. A limit groove 74 is also provided on the inner wall of the abutment groove 72. The limit block 73 is slidably engaged with the dust filter plate 4 in the thickness direction of the dust filter plate 4 through the limit groove 74. A limit spring 75 is fixed to the side of the limit block 73 close to the insert block 42. The end of the limit spring 75 away from the limit block 73 is fixedly connected to the inner wall of the limit groove 74. A connecting groove 46 for passing the abutment block 7 is provided on the side of the insert block 42. The connecting groove 46 is provided with an inclined surface 1 461 on the inner wall away from the rotating cylinder 32. A inclined surface 2 71 is provided on the side of the abutment block 7 close to the abutment block 7. The inclined surface 2 71 can abut against the inclined surface 1 461.

[0037] Push the abutment block 7 toward the insertion block 42, and the inclined surface 1 461 and the inclined surface 2 71 abut against each other, so that the insertion block 42 moves toward the direction away from the rotating cylinder 32, so that the insertion block 42 enters the slot 41, and then align the insertion block 42 with the insertion groove 33, release the abutment block 7, and the insertion block 42 is inserted into the insertion groove 33 under the elastic force of the sliding spring 45, so that the dust filter plate 4 is clamped and fixed to the rotating cylinder 32.

[0038] Reference Figure 2 and Figure 5 Two horizontally arranged connecting plates 5 are fixed to the side of the heat dissipation box 1, and positioning plates 51 are fixed to the ends of the two connecting plates 5 away from the heat dissipation box 1. After the dust filter plate 4 is rotated downward, the bottom surface of the dust filter plate 4 can abut against the top surface of the positioning plate 51. Sliding grooves 53 are respectively provided on the opposite inner sides of the two connecting plates 5. The connecting plates 5 are slidably installed with sliding blocks 54 along their own length directions through the sliding grooves 53, and a cleaning brush 52 is rotatably installed between the two sliding blocks 54. Screw 2 55 is rotatably installed in one of the sliding grooves 53, and screw 2 55 is threadedly matched with the sliding block 54. Motor 2 56 is fixed on the connecting plate 5, and the output end of motor 2 56 is fixedly connected to the end of screw 2 55.

[0039] Start motor 2 56 , which drives screw 2 55 to rotate. Screw 2 55 drives the sliding block 54 to move in the sliding groove 53 , thereby driving the cleaning brush 52 to move along the length direction of the connecting plate 5 , so that the cleaning brush 52 can clean the dust filter plate 4 .

[0040] Reference Figure 5 and Figure 6 , a rotating rod 6 is coaxially fixed to the end face of one of the rotating cylinders 32, and a gear 61 is sleeved and fixed on the outer circumference of the rotating rod 6. A driving groove 63 is provided on the side of the dust cover 3 close to the connecting plate 5. The dust cover 3 is slidably mounted with a rack 62 along the length direction of the connecting plate 5 through the driving groove 63. The rack 62 is meshed with the gear 61, and the rack 62 is located above the gear 61. A driving spring 64 is fixed to the side of the rack 62 away from the connecting plate 5. The end of the driving spring 64 away from the rack 62 is fixedly connected to the inner wall of the driving groove 63. A vertically arranged support rod 58 is fixed to the top surface of the sliding block 54. A horizontally arranged push rod 59 is fixed to the side of the support rod 58 close to the rack 62. The push rod 59 can abut against the rack 62. A clearance groove 57 is provided on the top surface of the connecting plate 5. The support rod 58 slides and cooperates with the connecting plate 5 along the length direction of the connecting plate 5 through the clearance groove 57.

[0041] When the sliding block 54 moves in the direction away from the dust filter plate 4, the sliding block 54 drives the pushing rod 59 to move synchronously, and the rack 62 moves in the direction close to the positioning plate 51 under the elastic force of the driving spring 64, and the rack 62 drives the gear 61 to rotate, and the gear 61 drives the rotating cylinder 32 to rotate through the rotating rod 6, thereby driving the dust filter plate 4 to flip downward, so that the cleaning brush 52 can clean the dust filter plate 4; when the sliding block 54 moves in the direction close to the dust filter plate 4, the pushing rod 59 pushes the rack 62 to move in the direction close to the driving spring 64, and the rack 62 drives the gear 61 to rotate in the opposite direction, thereby driving the dust filter plate 4 to rotate upward and reset.

[0042] The implementation principle of a cooling device for a headlight module circuit board in an embodiment of the present application is as follows: by rotating the screw 23, the position of the movable plate 211 can be adjusted so that the spacing between the movable plate 211 and the fixed plate 212 is the same as the width of the circuit board. The circuit board moves along the length direction of the heat dissipation box 1 under the action of the conveyor belt 22, so that the fan 12 can cool the circuit board, and the cooling efficiency is relatively high.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A cooling device for a headlight module circuit board, characterized in that: The invention comprises a heat dissipation box (1), wherein the top of the heat dissipation box (1) is hingedly connected with a cover plate (11), a plurality of fans (12) are installed on the cover plate (11), a pneumatic spring (13) is installed between the cover plate (11) and the heat dissipation box (1), two bearing frames (2) are arranged in the heat dissipation box (1), and the bearing frames (2) include a bearing plate (21), the side of the bearing plate (21) can be fitted with the side of the circuit board, and the relative inner sides of the two bearing plates (21) are A conveyor belt (22) for conveying circuit boards is provided, the two carrying plates (21) are respectively a movable plate (211) and a fixed plate (212) fixed in the heat dissipation box (1), two screw rods (23) are rotatably installed in the heat dissipation box (1), two movable seats (24) are fixed at the bottom of the movable plate (211), the movable seats (24) are sleeved on the outer periphery of the screw rod (23), and the movable seats (24) and the screw rod (23) are threadedly matched.

2. The cooling device for a headlight module circuit board according to claim 1, characterized in that: The outer periphery of the screw rod (23) is sleeved with a synchronous wheel (25), and the outer periphery of the two synchronous wheels (25) is sleeved with a synchronous belt (26). The heat dissipation box (1) is equipped with a motor (27), and the output end of the motor (27) is coaxially fixedly connected to the end of one of the screw rods (23).

3. The cooling device for a headlight module circuit board according to claim 1, characterized in that: A dust cover (3) is fixed on the top of the heat dissipation box (1), an air inlet (31) is opened on the side of the dust cover (3), a dust filter plate (4) is rotatably installed in the air inlet (31), two connecting plates (5) are fixed on the side of the heat dissipation box (1), positioning plates (51) are fixed at the ends of the two connecting plates (5) away from the heat dissipation box (1), a cleaning brush (52) is slidably installed between the two connecting plates (5) along their own length direction, and a rotating component for pushing the dust filter plate (4) to rotate downward is provided on the dust cover (3).

4. The cooling device for a headlight module circuit board according to claim 3, characterized in that: The two connecting plates (5) are provided with sliding grooves (53) on the opposite inner sides thereof. The connecting plates (5) are provided with sliding blocks (54) for sliding along their own length direction through the sliding grooves (53). The cleaning brush (52) is rotatably installed between the two sliding blocks (54). A second screw (55) is rotatably installed in one of the sliding grooves (53). The second screw (55) is threadedly coupled with the sliding block (54). A second motor (56) is fixed on the connecting plate (5). The output end of the second motor (56) is fixedly connected to the end of the second screw (55).

5. The cooling device for a headlight module circuit board according to claim 4, characterized in that: Rotating cylinders (32) are rotatably mounted on the opposite inner sides of the air inlet (31), slots (41) are respectively provided on both sides of the dust filter plate (4), and the dust filter plate (4) is slidably mounted with an insert block (42) along its own length direction through the slots (41), and an inserting groove (33) for inserting the insert block (42) is provided on the end surface of the rotating cylinder (32).

6. The cooling device for a headlight module circuit board according to claim 5, characterized in that: A slider (43) is fixed to the side of the insert (42), and a slide groove (44) is provided on the inner wall of the slot (41). The slider (43) slides and cooperates with the dust filter plate (4) along the length direction of the dust filter plate (4) through the slide groove (44). A sliding spring (45) is fixed to the side of the slider (43) away from the rotating cylinder (32), and one end of the sliding spring (45) away from the slider (43) is fixedly connected to the inner wall of the slide groove (44).

7. The cooling device for a headlight module circuit board according to claim 5, characterized in that: The rotating assembly includes a rotating rod (6), the rotating rod (6) is coaxially fixedly connected to the end face of one of the rotating cylinders (32), a gear (61) is fixedly sleeved on the outer peripheral surface of the rotating rod (6), a driving groove (63) is provided on the side of the dust cover (3) close to the connecting plate (5), and the dust cover (3) is slidably installed with a rack (62) along the length direction of the connecting plate (5) through the driving groove (63), the rack (62) and the gear (61) are meshed with each other, the rack (62) is located above the gear (61), and the rack (62) is away from the connecting plate ( 5), a driving spring (64) is fixed on the side of the connecting plate (5), and one end of the driving spring (64) away from the rack (62) is fixedly connected to the inner wall of the driving groove (63); a support rod (58) is fixed on the top surface of the sliding block (54), and a push rod (59) is fixed on the side of the supporting rod (58) close to the rack (62), and the push rod (59) can abut against the rack (62); a clearance groove (57) is provided on the top surface of the connecting plate (5), and the support rod (58) slides and cooperates with the connecting plate (5) along the length direction of the connecting plate (5) through the clearance groove (57).

8. The cooling device for a headlight module circuit board according to claim 7, characterized in that: The dust filter plate (4) is provided with an abutting groove (72) on the side away from the connecting plate (5); the dust filter plate (4) is slidably mounted with an abutting block (7) along its own thickness direction through the abutting groove (72); the side of the inserting block (42) is provided with a connecting groove (46) for passing the abutting block (7); the connecting groove (46) is provided with a first inclined surface (461) on the inner wall away from the rotating cylinder (32); the side of the abutting block (7) close to the abutting block (7) is provided with a second inclined surface (71); the second inclined surface (71) can abut against the first inclined surface (461).

9. The cooling device for a headlight module circuit board according to claim 8, characterized in that: A limiting block (73) is fixed on the side of the abutting block (7), and a limiting groove (74) is also provided on the inner wall of the abutting groove (72). The limiting block (73) is slidably engaged with the dust filter plate (4) along the thickness direction of the dust filter plate (4) through the limiting groove (74). A limiting spring (75) is fixed on the side of the limiting block (73) close to the inserting block (42), and one end of the limiting spring (75) away from the limiting block (73) is fixedly connected to the inner wall of the limiting groove (74).

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