Protective film pasting device for flexible circuit board

Abstract

The invention discloses a protective film pasting device for a flexible circuit board, and relates to the technical field of flexible circuit boards. The film sticking machine body is arranged above the operation table; the two side shaft brackets are symmetrically distributed in the laminator body; the baffle is arranged on the same side of the two shaft brackets; and a lifting limiting plate. When the film sticking machine is used, after single-face film sticking of the flexible circuit board is completed, the flexible circuit board is taken out from the penetrating hole away from the limiting frame, turned over and then put into the film sticking machine body, in the putting-in process, an air blower is started, the air blower cools a protective film on the flexible circuit board through cooling holes in all telescopic cooling pipes, and meanwhile, the protective film on the flexible circuit board is cooled through cooling holes in all the telescopic cooling pipes. The first hydraulic cylinder is adjusted to drive the two pressing rollers to move towards the periphery, and in the moving process, the pressing rollers are matched with all the flattening rollers to further flatten and unfold the protective film, so that cooling of the protective film is accelerated, and wrinkles generated after the protective film is turned over are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible circuit boards, and in particular to a device for attaching protective films to flexible circuit boards. Background Art

[0002] Flexible circuit boards, also known as "soft boards", are printed circuits made of flexible insulating substrates. After the production of flexible circuit boards is completed, protective films need to be attached to both surfaces for easy storage and transportation. When using, you only need to tear off the protective film.

[0003] During use, the existing flexible circuit board protective film pasting device needs to be turned over after pasting the film on one side of the flexible circuit board. After turning over, the side with the original film pasting is at the bottom. Due to its own gravity and the fact that the protective film is not completely adhered to the flexible circuit board, the flipped protective film will have local wrinkles, which will reduce the film pasting effect and make the protective film pasting device lack of use value. Summary of the Invention

[0004] The present invention discloses a device for applying protective film to a flexible circuit board, which aims to solve the technical problem that in the existing device for applying protective film to a flexible circuit board, after applying film to one side of the flexible circuit board during use, the flexible circuit board needs to be turned over. After turning over, the side originally applied with film is at the bottom, and the protective film, due to its own gravity and the fact that it is not completely adhered to the flexible circuit board, causes local wrinkles on the flipped protective film.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A device for attaching a protective film to a flexible circuit board, comprising: operating table; The laminating machine body is set above the operating table; Two side shaft frames are symmetrically distributed inside the laminating machine body; a baffle, arranged on the same side of the two shaft brackets; A lifting limit plate, wherein the two side shaft frames are provided with lifting grooves on the same side away from the baffle, and the lifting limit plate is slidably connected to the inside of the two lifting grooves; The reprocessing mechanism is provided with a laminating machine body located between two side shaft frames; The cleaning mechanism is arranged at the feed inlet of the laminating machine body close to the lifting limit plate.

[0006] In a preferred embodiment, the reprocessing mechanism includes: Two movable shaft frames are symmetrically distributed inside the laminating machine body; The middle plate is arranged at the bottom of the baffle and is located between the two movable shaft frames. The side of the baffle facing the two movable shaft frames is fixedly connected to a hydraulic cylinder 1, and the output end of the hydraulic cylinder 1 is fixedly connected to an adjustment frame, which is fixedly connected to the outer wall of the movable shaft frame.

[0007] In a preferred embodiment, the reprocessing mechanism further comprises: Two pressing rollers, both ends of which are connected to corresponding movable shaft frames through bearings, and a filling cavity is opened inside the pressing roller, and the filling cavity is filled with cooling water. Both ends of the pressing roller located at the filling cavity are opened with an inlet hole, and the inside of the two inlet holes are fixedly connected to a liquid adding pipe, and the liquid adding pipe is connected to a pipe valve through a flange; Multiple telescopic cooling pipes are arranged on the top of the two adjustment racks, and each telescopic cooling pipe has a cooling hole facing upward; The connecting pipe is arranged in the connecting holes opened in the middle sections of the multiple telescopic cooling pipes.

[0008] In a preferred solution, the two movable shaft frames are connected to smoothing rollers through bearings at equal distances away from the pressure roller, and one of the movable shaft frames is fixedly connected to a frame, and the frame is fixedly connected to a blower, and the blowing end of the blower is connected to the inside of the connecting pipe through a pipe.

[0009] In a preferred solution, the two side shaft frames are equidistantly connected to guide rollers through bearings, and the two side shaft frames are fixedly connected to mounting frames above the lifting limit plate, and the mounting frames are fixedly connected to hydraulic cylinder 2 on the side walls facing the lifting limit plate, and the output end of hydraulic cylinder 2 is fixedly connected to the top of the lifting limit plate.

[0010] In a preferred embodiment, an embedding groove is provided on the side of the baffle facing the lifting limit plate, and a pressure sensor is fixedly connected to the inside of the embedding groove at equal distances. The embedding groove is located at the periphery of the pressure sensor and is fixedly connected to two telescopic connecting rods, and the ends of the two telescopic connecting rods are fixedly connected to the same pressure plate.

[0011] In a preferred embodiment, the cleaning mechanism comprises: The limiting frame is arranged on the side of the laminating machine body away from the baffle; Two drive motors are arranged on the same side of the limit frame. The output shafts of the two drive motors are fixedly connected to the rotating shaft through a coupling. The ends of the rotating shaft are connected to the inner wall of one side of the limit frame through a bearing. The two rotating columns are respectively arranged on the outer side walls of the two rotating shafts.

[0012] In a preferred embodiment, the cleaning mechanism further comprises: Multiple adjustment arc plates, the outer side wall of the rotating column is annularly provided with a mounting groove, the interior of each mounting groove is evenly and fixedly connected with a self-adjusting spring rod, and the adjustment arc plates are fixedly connected to the ends of the multiple self-adjusting spring rods in the same mounting groove; Brush bristles are arranged on the arc surface of each adjusting arc plate.

[0013] In a preferred embodiment, the cleaning mechanism further comprises: Two air injection pipes are arranged on opposite sides of the limiting frame between the two rotating columns, and the outer side walls of the air injection pipes facing the adjacent rotating columns are provided with air injection holes; Two air compressors are arranged on the outer side wall of the limiting frame close to the air injection pipe, and the air delivery ends of the air compressors are connected to the inside of the adjacent air injection pipes through pipelines.

[0014] In a preferred solution, the limit frame is fixedly connected to a triangular scraper at the upper and lower ends of the two rotating columns, and grooves are opened on the triangular scraper at equal distances. An elastic connecting rod is fixedly connected to the inside of each groove, and an impact ball is fixedly connected to the end of each elastic connecting rod.

[0015] The present invention provides a flexible circuit board protective film pasting device. After the single-sided film pasting of the flexible circuit board is completed, it is taken out from the perforation away from the limit frame, turned over, and then placed in the film pasting machine body. During the placement process, the blower is started, and the blower cools the protective film on the flexible circuit board through the cooling holes on each telescopic cooling tube. At the same time, the hydraulic cylinder is adjusted to drive the two pressing rollers to move toward the periphery. During the movement, the pressing roller cooperates with each smoothing roller to further smooth and unfold the protective film, thereby accelerating the cooling of the protective film and avoiding wrinkles after the protective film is flipped. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a flexible circuit board protective film device proposed by the present invention.

[0017] Figure 2 for Figure 1 Cross-sectional view of the main structure of the film laminating machine.

[0018] Figure 3 This is a schematic diagram of the internal structure of a film laminating machine body of a flexible circuit board protective film laminating device proposed by the present invention.

[0019] Figure 4 This is a schematic diagram of the reprocessing mechanism of a flexible circuit board protective film device proposed by the present invention.

[0020] Figure 5 for Figure 4 Cross-sectional view of the intermediate pressure roller structure.

[0021] Figure 6 This is a disassembled diagram of the pressure plate and baffle structure of a flexible circuit board protective film device proposed by the present invention.

[0022] Figure 7 This is a schematic diagram of a cleaning mechanism for a flexible circuit board protective film device proposed by the present invention.

[0023] Figure 8 for Figure 7 Schematic diagram of the internal structure of the middle limit frame.

[0024] Figure 9 for Figure 8 Schematic diagram of the planar structure.

[0025] Figure: 1. Operating table; 2. Laminating machine body; 3. Cleaning mechanism; 301. Limiting frame; 302. Rotating shaft; 303. Driving motor; 304. Air compressor; 305. Adjusting arc plate; 306. Brush; 307. Rotating column; 308. Groove; 309. Triangular scraper; 310. Jet nozzle; 311. Spray hole; 312. Elastic connecting rod; 313. Impact ball; 314. Self-adjusting spring rod; 4. Guide roller; 5. Baffle; 6. Side shaft frame; 7. Lifting trough; 8. Reprocessing machine Structure; 801, movable shaft frame; 802, blower; 803, pressure roller; 804, pipe valve; 805, middle plate; 806, hydraulic cylinder 1; 807, frame; 808, liquid adding pipe; 809, smoothing roller; 810, adjustment frame; 811, connecting pipe; 812, telescopic cooling pipe; 813, cooling hole; 814, filling cavity; 9, lifting limit plate; 10, hydraulic cylinder 2; 11, mounting frame; 12, pressure plate; 13, pressure sensor; 14, embedded slot; 15, telescopic connecting rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] The present invention discloses a device for applying protective film to a flexible circuit board, which is mainly used for applying film to one side of a flexible circuit board and then turning it over. After turning over, the side with the original film applied is at the bottom. Due to its own gravity and the fact that the protective film is not completely adhered to the flexible circuit board, the protective film that is flipped over to the bottom may have local wrinkles.

[0028] Reference Figures 1-9 A flexible circuit board protective film device, comprising: Operation table 1; The laminating machine body 2 is arranged above the operating table 1; Two side shaft frames 6 are symmetrically distributed inside the laminating machine body 2; Baffle 5, arranged on the same side of the two shaft frames; The lifting limit plate 9 has a lifting groove 7 on the same side of the two side shaft frames 6 away from the baffle 5, and the lifting limit plate 9 is slidably connected to the inside of the two lifting grooves 7; The reprocessing mechanism 8 is provided with the laminating machine body 2 located between the two side shaft frames 6; The cleaning mechanism 3 is arranged at the feed port of the laminating machine body 2 close to the lifting limit plate 9.

[0029] Reference Figure 1-Figure 5 In a preferred embodiment, the reprocessing mechanism 8 includes: Two movable shaft frames 801 are symmetrically distributed inside the laminating machine body 2; The middle plate 805 is arranged at the bottom of the baffle 5, and the middle plate 805 is located between the two movable shaft frames 801. The side of the baffle 5 facing the two movable shaft frames 801 is fixedly connected to a hydraulic cylinder 806, and the output end of the hydraulic cylinder 806 is fixedly connected to an adjustment frame 810, and the adjustment frame 810 is fixedly connected to the outer wall of the movable shaft frame 801.

[0030] In a specific application scenario, after the single-sided film lamination of the flexible circuit board is completed, it is taken out from the perforation away from the limit frame 301, turned over, and then placed in the laminating machine body 2. During the placement process, the blower 802 is started, and the blower 802 cools the protective film on the flexible circuit board through the cooling holes 813 on each telescopic cooling tube 812. At the same time, the hydraulic cylinder 806 is adjusted to drive the two pressing rollers 803 to move toward the periphery. During the movement, the pressing roller 803 cooperates with each smoothing roller 809 to further smooth and unfold the protective film, thereby accelerating the cooling of the protective film and avoiding wrinkles after the protective film is turned over, thereby improving the laminating effect.

[0031] Specifically, when the pressure roller 803 moves, while the pressure roller 803 plays the role of smoothing and unfolding, the cooling liquid filled inside it absorbs the heat transferred by the pressure roller 803, further improving the cooling effect of the protective film. The pressure roller 803 here is made of heat-conducting material.

[0032] It should be noted that the telescopic cooling tube 812 is stretched as the pressure roller 803 moves, and the range of the protective film covered by the gas ejected from the cooling telescopic tube is further increased, thereby further improving the cooling effect of the protective film, accelerating the progress of adhesion between the protective film and the flexible circuit board, and better avoiding wrinkles after the protective film is flipped over.

[0033] Reference Figure 3-Figure 5 In a preferred embodiment, the reprocessing mechanism 8 further comprises: Two pressure rollers 803, both ends of which are connected to corresponding movable shaft frames 801 via bearings. Filling cavities 814 are defined within the pressure rollers 803, which are filled with cooling water. Inlet holes are defined at both ends of the pressure rollers 803 located at the filling cavities 814, and both inlet holes are fixedly connected to liquid-feeding pipes 808, which are flange-connected to valves 804. Multiple telescopic cooling pipes 812 are arranged on the top of the two adjustment frames 810, and each telescopic cooling pipe 812 has a cooling hole 813 facing upward; The connecting pipe 811 is disposed in a connecting hole opened in the middle section of the plurality of telescopic cooling pipes 812 .

[0034] Reference Figure 4 and Figure 5 In a preferred embodiment, two movable shaft frames 801 are connected to smoothing rollers 809 through bearings at equal distances away from the pressure roller 803, and one of the movable shaft frames 801 is fixedly connected to a frame 807, and a blower 802 is fixedly connected to the frame 807, and the blowing end of the blower 802 is connected to the inside of the connecting pipe 811 through a pipe.

[0035] Reference Figure 1 、 Figure 3 and Figure 6 In a preferred embodiment, the two side shaft frames 6 are evenly connected to the guide rollers 4 through bearings, and the two side shaft frames 6 are fixedly connected to the mounting frames 11 above the lifting limit plate 9. The mounting frames 11 are fixedly connected to the side walls facing the lifting limit plate 9 with hydraulic cylinder 2 10, and the output end of the hydraulic cylinder 2 10 is fixedly connected to the top of the lifting limit plate 9.

[0036] Reference Figure 6 In a preferred embodiment, an embedding groove 14 is opened on the side of the baffle 5 facing the lifting limit plate 9, and a pressure sensor 13 is fixedly connected to the inside of the embedding groove 14 at equal distances. The embedding groove 14 is located at the periphery of the pressure sensor 13 and is fixedly connected to two telescopic links 15, and the ends of the two telescopic links 15 are fixedly connected to the same pressure plate 12.

[0037] Specifically, when placing the flexible circuit board, it is passed through the limit frame 301 into the interior of the film laminating machine body 2. After one side of the flexible circuit board contacts and squeezes the pressure plate 12, the pressure sensor 13 sends a signal, and the flexible circuit board is completely placed between the baffle 5 and the lifting limit plate 9. The hydraulic cylinder 2 10 is adjusted to drive the lifting limit plate 9 to descend, and the two ends of the flexible circuit board are fixed by the lifting limit plate 9 and the baffle 5 to avoid displacement during the film laminating process.

[0038] Reference Figure 1 、 Figure 2and Figure 7 In a preferred embodiment, the cleaning mechanism 3 includes: The limiting frame 301 is arranged on the side of the laminating machine body 2 away from the baffle 5; Two drive motors 303 are provided on the same side of the limiting frame 301. The output shafts of the two drive motors 303 are fixedly connected to the rotating shaft 302 via a coupling. The ends of the rotating shaft 302 are connected to the inner wall of one side of the limiting frame 301 via a bearing. The two rotating posts 307 are respectively disposed on the outer side walls of the two rotating shafts 302 .

[0039] Reference Figure 7-Figure 9 In a preferred embodiment, the cleaning mechanism 3 further comprises: Multiple adjustment arc plates 305, the outer wall of the rotating column 307 is annularly provided with mounting grooves, and the interior of each mounting groove is evenly and fixedly connected to a self-adjusting spring rod 314, and the adjustment arc plates 305 are fixedly connected to the ends of multiple self-adjusting spring rods 314 in the same mounting groove; The bristles 306 are provided on the arc surface of each adjusting arc plate 305 .

[0040] Specifically, before the flexible circuit board is placed inside the laminating machine body 2, it passes through the two rotating columns 307 of the limit frame 301, and the drive motor 303 is started. The drive motor 303 drives each bristle 306 to brush off the dust attached to the flexible circuit board. During the contact between the bristles 306 and the flexible circuit board, the self-adjusting spring rod 314 on the adjusting arc plate 305 is automatically adjusted to avoid excessive squeezing between the bristles 306 and the flexible circuit board, which may cause damage to the flexible circuit board. At the same time, the air compressor 304 is started, and the air compressor 304 blows away the dust brushed off by the bristles 306 through the nozzle 311 on the air jet tube 310 to avoid secondary adhesion of dust, thereby ensuring the cleanliness of the upper and lower sides of the flexible circuit board and preventing the presence of dust from affecting the laminating effect.

[0041] It should be noted that the driving motor 303 drives the bristles 306 to rotate to the triangular scraper 309, and the bristles 306 come into contact with the impact ball 313 and produce a slight collision. The impact ball 313 then vibrates and separates the dust carried by the bristles 306, preventing the dust from adhering to the bristles 306 and reducing the subsequent cleaning effect.

[0042] Reference Figure 7-Figure 9 In a preferred embodiment, the cleaning mechanism 3 further comprises: Two air injection pipes 310 are provided on opposite sides of the limiting frame 301 between the two rotating pillars 307 , and the outer side walls of the air injection pipes 310 facing the adjacent rotating pillars 307 are provided with spray holes 311 ; Two air compressors 304 are disposed on the outer side wall of the limiting frame 301 close to the air injection pipe 310 , and the air delivery ends of the air compressors 304 are connected to the interior of the adjacent air injection pipe 310 through pipelines.

[0043] In the present invention, the limit frame 301 is located at the upper and lower ends of the two rotating columns 307 and is fixedly connected to a triangular scraper 309, and grooves 308 are opened at equal distances on the triangular scraper 309. The inside of each groove 308 is fixedly connected to an elastic connecting rod 312, and the end of each elastic connecting rod 312 is fixedly connected to an impact ball 313.

[0044] Working principle: When in use, before the flexible circuit board is placed inside the laminating machine body 2, it passes through the two rotating columns 307 of the limit frame 301, and the drive motor 303 is started. The drive motor 303 drives each brush 306 to brush off the dust attached to the flexible circuit board. At the same time, the air compressor 304 is started, and the air compressor 304 blows away the dust brushed off by the brush 306 through the nozzle 311 on the air jet tube 310 to avoid secondary adhesion of dust. After the flexible circuit board is cleaned, one side of the flexible circuit board contacts and is squeezed by the pressure plate 12, and the pressure sensor 13 sends a signal, then the flexible circuit board is completely placed between the baffle 5 and the lifting limit plate 9, and the hydraulic cylinder 2 10 is adjusted to drive the lifting limit plate 9 to descend, and the two sides of the flexible circuit board are realized through the lifting limit plate 9 and the baffle 5. The end is fixed. After the fixation is completed, the laminating machine body 2 runs and starts the single-sided laminating operation of the flexible circuit board. After the single-sided laminating is completed, it is taken out from the perforation away from the limit frame 301, turned over, and then placed in the laminating machine body 2. During the placement process, the blower 802 is started. The blower 802 cools the protective film on the flexible circuit board through the cooling holes 813 on each telescopic cooling tube 812. At the same time, the hydraulic cylinder 806 is adjusted to drive the two pressing rollers 803 to move toward the periphery. During the movement, the pressing roller 803 cooperates with each smoothing roller 809 to further smooth and unfold the protective film to avoid the formation of wrinkles. At the same time, the laminating machine body 2 runs again to complete the laminating operation on the other side of the flexible circuit board. After the laminating is completed, it is taken out and the operation is ended.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for applying protective film to a flexible circuit board, characterized in that: include: Operation table (1); The laminating machine body (2) is arranged above the operating table (1); Two side shaft frames (6) are symmetrically distributed inside the laminating machine body (2); A baffle (5) is provided on the same side of the two shaft frames; A lifting limit plate (9), wherein the two side shaft frames (6) are provided with lifting grooves (7) on the same side away from the baffle (5), and the lifting limit plate (9) is slidably connected to the inside of the two lifting grooves (7); A reprocessing mechanism (8) is provided with a laminating machine body (2) located between two side shaft frames (6); The cleaning mechanism (3) is arranged at the feed port of the laminating machine body (2) close to the lifting limit plate (9).

2. The device for applying protective film to a flexible circuit board according to claim 1, characterized in that: The reprocessing mechanism (8) comprises: Two movable shaft frames (801) are symmetrically distributed inside the laminating machine body (2); The middle plate (805) is arranged at the bottom of the baffle (5), and the middle plate (805) is located between the two movable shaft frames (801). The side of the baffle (5) facing the two movable shaft frames (801) is fixedly connected to a hydraulic cylinder 1 (806), and the output end of the hydraulic cylinder 1 (806) is fixedly connected to an adjustment frame (810), and the adjustment frame (810) is fixedly connected to the outer wall of the movable shaft frame (801).

3. The device for applying protective film to a flexible circuit board according to claim 2, characterized in that: The reprocessing mechanism (8) further comprises: Two pressure rollers (803), both ends of the pressure rollers (803) are connected to corresponding movable shaft frames (801) via bearings, a filling cavity (814) is provided inside the pressure rollers (803), the filling cavity (814) is filled with cooling water, both ends of the pressure rollers (803) located at the filling cavity (814) are provided with inlet holes, the interiors of the two inlet holes are fixedly connected to liquid adding pipes (808), and the liquid adding pipes (808) are connected to the pipe valves (804) via flanges; A plurality of telescopic cooling pipes (812) are arranged on the top of the two adjustment frames (810), and each telescopic cooling pipe (812) has a cooling hole (813) facing upward; The connecting pipe (811) is arranged in a connecting hole opened in the middle section of the plurality of telescopic cooling pipes (812).

4. The device for applying protective film to a flexible circuit board according to claim 3, characterized in that: The two movable shaft frames (801) are connected to smoothing rollers (809) at equal distances away from the pressure roller (803) through bearings, and one of the movable shaft frames (801) is fixedly connected to a frame (807), and the frame (807) is fixedly connected to a blower (802), and the blowing end of the blower (802) is connected to the inside of the connecting pipe (811) through a pipeline.

5. The device for attaching a protective film to a flexible circuit board according to claim 1, characterized in that: The two side shaft frames (6) are connected to guide rollers (4) at equal distances through bearings, and the two side shaft frames (6) are fixedly connected to mounting frames (11) located above the lifting limit plate (9), and the mounting frames (11) are fixedly connected to the side walls facing the lifting limit plate (9) with hydraulic cylinder 2 (10), and the output end of hydraulic cylinder 2 (10) is fixedly connected to the top of the lifting limit plate (9).

6. The device for attaching a protective film to a flexible circuit board according to claim 5, characterized in that: An embedding groove (14) is formed on a side of the baffle (5) facing the lifting limit plate (9), and a pressure sensor (13) is fixedly connected to the inside of the embedding groove (14) at equal distances. Two telescopic connecting rods (15) are fixedly connected to the embedding groove (14) at the periphery of the pressure sensor (13), and the ends of the two telescopic connecting rods (15) are fixedly connected to the same pressure plate (12).

7. The device for applying protective film to a flexible circuit board according to claim 1, characterized in that: The cleaning mechanism (3) comprises: A limit frame (301) is provided on a side of the laminating machine body (2) away from the baffle (5); Two drive motors (303) are arranged on the same side of the limiting frame (301), the output shafts of the two drive motors (303) are fixedly connected to the rotating shaft (302) through a coupling, and the end of the rotating shaft (302) is connected to the inner wall of one side of the limiting frame (301) through a bearing; The two rotating columns (307) are respectively arranged on the outer side walls of the two rotating shafts (302).

8. The device for attaching a protective film to a flexible circuit board according to claim 7, characterized in that: The cleaning mechanism (3) further comprises: A plurality of adjustment arc plates (305), the outer side wall of the rotating column (307) is provided with an annular mounting groove, a self-adjusting spring rod (314) is fixedly connected at equal distances inside each mounting groove, and the adjustment arc plates (305) are fixedly connected to the ends of the plurality of self-adjusting spring rods (314) inside the same mounting groove; Brush bristles (306) are arranged on the arc surface of each adjusting arc plate (305).

9. The device for attaching a protective film to a flexible circuit board according to claim 8, characterized in that: The cleaning mechanism (3) further comprises: Two air injection pipes (310) are arranged on opposite sides of the limiting frame (301) between the two rotating columns (307), and the outer side walls of the air injection pipes (310) facing the adjacent rotating columns (307) are provided with air injection holes (311); Two air compressors (304) are arranged on the outer side wall of the limiting frame (301) close to the air injection pipe (310), and the air delivery ends of the air compressors (304) are connected to the inside of the adjacent air injection pipe (310) through pipelines.

10. The device for attaching a protective film to a flexible circuit board according to claim 9, characterized in that: The limit frame (301) is fixedly connected to triangular scrapers (309) at the upper and lower ends of the two rotating columns (307), and grooves (308) are formed on the triangular scrapers (309) at equal intervals. An elastic connecting rod (312) is fixedly connected inside each groove (308), and an impact ball (313) is fixedly connected to the end of each elastic connecting rod (312).

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