A flexible circuit board defect detection method based on multiple detections

Abstract

The present invention relates to the field of flexible circuit boards, and provides a method for detecting defects in flexible circuit boards based on multiple tests, comprising the following steps: using a high-temperature folding test device to perform high-temperature resistance performance tests and folding tests on the flexible circuit board, the high-temperature folding test device comprising a body, a machine cavity provided in the body, a folding assembly and a heat generating assembly provided in the machine cavity, the folding assembly comprising a folding seat, a motor, a rotating wheel, a rotating bar and two clamping assemblies; the clamping assembly comprising a clamping portion, a telescopic rod, a mounting plate and an elastic member; the heat generating assembly comprising a transmission belt, a rotating wheel, a spur gear, a slide plate, a heating wire and an air generator, and the heating wire and the air generator are both fixed to the slide plate. The present invention can perform multiple folding tests on the flexible circuit board by driving a motor, and detect whether the flexible circuit board can still maintain good folding and bending performance in a high temperature environment, thereby realizing multi-faceted detection and improving production detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible circuit boards, and in particular to a flexible circuit board defect detection method based on multiple detections. Background Art

[0002] Flexible printed circuit board, referred to as FPC, is a printed circuit board made of a flexible insulating substrate. It has high reliability and excellent flexibility. It is usually used in electronic devices that need to be bent or folded, such as smartphones, tablets, wearable devices, etc.

[0003] During the production process of flexible circuit boards, they need to undergo a variety of tests, including folding tests and high temperature resistance tests. These two tests are often conducted separately and require the use of two devices, which is time-consuming and labor-intensive, reducing production inspection efficiency. Summary of the invention

[0004] In view of the above technical problems, the present invention aims to provide a flexible circuit board defect detection method based on multiple detections. To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A method for detecting defects in a flexible circuit board based on multiple tests comprises the following steps: using a high temperature folding test device to perform a high temperature resistance performance test and a folding test on the flexible circuit board;

[0006] The high-temperature folding test device comprises a body, a machine cavity is provided in the body, and a folding component and a heat generating component are arranged in the machine cavity;

[0007] The winding and folding assembly comprises a winding and folding seat, a motor, a rotating wheel 1, a rotating strip 1 and two clamping assemblies.

[0008] The folding seat is slidably connected to the inner wall of the machine cavity, the folding sheet 1, the folding sheet 2 and the transmission seat are fixedly connected to the folding seat, a transmission groove is provided on the transmission seat, the motor is fixedly connected to the inner wall of the machine cavity, the rotating wheel 1 is fixedly connected to the output shaft of the motor, the rotating wheel 1 is rotatably connected to the rotating bar 1, and the rotating bar 1 is slidably connected to the inner wall of the transmission groove;

[0009] The clamping assembly includes a clamping part, a telescopic rod, a mounting plate and an elastic member 1, the mounting plate is fixedly connected to the inner wall of the machine cavity, the telescopic rod is fixedly connected to the mounting plate, the clamping part is fixedly connected to the telescopic rod, and the clamping part is connected to the mounting plate through the elastic member 1;

[0010] The heat generating component includes a transmission belt, a second impeller, a spur gear, a slide plate, an electric heating wire and an air generator. The second impeller is rotatably connected to the inner wall of the machine cavity. The second impeller is connected to the first impeller through a transmission belt. The first spur gear is fixedly connected to the second impeller. The slide plate is connected to the inner wall of the machine cavity. The electric heating wire and the air generator are both fixedly connected to the slide plate. An air channel is opened on the air generator. A connecting frame is fixedly connected in the air channel. A fan blade assembly is rotatably connected to the connecting frame. A spur gear is fixedly connected to the fan blade assembly. The spur gear extends into the machine cavity.

[0011] Furthermore, a humidification component is provided in the machine cavity, and the humidification component includes a permanent magnet plate, an electromagnet and a humidification box. The permanent magnet plate is fixedly connected to the bottom wall of the slide plate, the slide plate is slidably connected to the inner wall of the machine cavity, the electromagnet is fixedly connected to the inner wall of the machine cavity, and a humidification chamber is opened on the humidification box, and the humidification chamber is filled with liquid.

[0012] Furthermore, a scale cleaning component is provided in the machine cavity, and the scale cleaning component includes a second rotating bar, a connecting plate, a transmission plate, a pull line, a guide wheel, a winding wheel and a third spur gear. The second rotating bar is rotatably connected to the slide plate, and the connecting plate is slidably connected to the inner wall of the machine cavity through a slider. Two wiping components are connected to the connecting plate, and the wiping component includes a guide plate, a cleaning plate, bristles, a first transmission plate, a second transmission plate and a second elastic member. The guide plate is fixed to the connecting plate, and the cleaning plate is slidably connected to the guide plate. The bristles, the first transmission plate and the second transmission plate are all fixed to the cleaning plate. The cleaning plate is connected to the connecting plate through the second elastic member, and the transmission plate is fixed to one of the guide plates. Transmission channel, rotating bar 2 is slidably connected to the inner wall of the transmission channel, a collecting plate is fixedly connected to the connecting plate, a rotating shaft is fixedly connected to the top wall of the collecting plate, a transmission rod is rotatably connected to the rotating shaft, and transmission wheels 1 and 2 are rotatably connected at both ends of the transmission rod, transmission wheel 1 extends to between transmission sheet 1 and transmission sheet 2 on one of the cleaning plates, and transmission wheel 2 extends to between transmission sheet 1 and transmission sheet 2 on another cleaning plate, the pull wire is fixedly connected to one of the cleaning plates, the guide wheel and spur gear 3 are both rotatably connected to the inner wall of the machine cavity, the winding wheel is fixedly connected to the spur gear 3, the pull wire passes around the guide wheel, the guide wheel and the winding wheel are fixedly connected, and the winding seat is fixedly connected with transmission teeth, and the transmission teeth and spur gear 3 are meshed.

[0013] Furthermore, a rack is fixedly connected to the bottom wall of the collecting plate, a liquid supply pipe is fixedly connected to the humidification chamber, the liquid supply pipe extends into the humidification chamber, the liquid supply pipe is connected to an external liquid supply system, a stop valve is fixedly connected to the stop valve, and a gear-shaped handwheel is rotatably connected to the stop valve.

[0014] Furthermore, a splash-proof net is fixedly and detachably connected to the inner wall of the humidification chamber, and a through hole is provided on the splash-proof net.

[0015] Furthermore, the heating wire is fixed to the slide plate via a heat-insulating mounting frame.

[0016] Furthermore, a door body is movably connected to the fuselage.

[0017] Furthermore, a data processing module is provided in the fuselage.

[0018] Furthermore, a temperature sensor is detachably connected to the inner wall of the machine cavity.

[0019] Furthermore, a humidity sensor is detachably connected to the inner wall of the machine cavity.

[0020] The present invention has the following beneficial effects:

[0021] The present invention has high linkage and can perform multiple winding and folding tests on the flexible circuit board clamped by the clamping part by driving a motor, so as to detect whether the performance of the flexible circuit board after multiple bending still meets the standards, and perform temperature raising operation in the machine cavity to detect whether the flexible circuit board can still maintain good folding and bending performance in a high temperature environment, thereby realizing multi-faceted detection and improving production detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a high-temperature folding test device in a flexible circuit board defect detection method based on multiple detections of the present invention;

[0024] Figure 2 The present invention Figure 1 The front view of the medium and high temperature winding and folding test device;

[0025] Figure 3 The present invention Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 The present invention Figure 3 Schematic diagram of the structure of the stop valve;

[0027] Figure 5 The present invention Figure 2 The enlarged view of point B in the middle;

[0028] Figure 6 The present invention Figure 5 The structural diagram of the middle transmission seat;

[0029] Figure 7 The present invention Figure 3 Top view of the middle connecting plate.

[0030] Figure numerals: 1, fuselage; 2, machine cavity; 3, clamping part; 4, telescopic rod; 5, mounting plate; 6, elastic member 1; 7, folding seat; 8, folding piece 1; 9, folding piece 2; 10, transmission gear; 11, transmission seat; 12, transmission slot; 13, motor; 14, rotating wheel 1; 15, rotating bar 1; 16, transmission belt; 17, rotating wheel 2; 18, spur gear 1; 19, slide plate; 20, heating wire; 21, insulation mounting frame; 22, air generator; 23, air channel; 24, connecting frame; 25, fan blade assembly; 26, spur gear 2; 27, permanent magnet plate; 28, electromagnet; 29, humidification box; 30, humidification chamber ; 31. splash screen; 32. through hole; 33. second rotating strip; 34. guide plate; 35. cleaning plate; 36. bristles; 37. transmission plate one; 38. transmission plate two; 39. elastic member two; 40. connecting plate; 41. transmission plate; 42. transmission channel; 43. slider; 44. transmission rod; 45. transmission wheel one; 46. transmission wheel two; 47. rotating shaft; 48. pull wire; 49. guide wheel; 50. winding wheel; 51. spur gear three; 52. collecting plate; 53. stop valve; 54. gear-shaped handwheel; 55. liquid supply pipe; 56. rack; 57. temperature sensor; 58. humidity sensor; 59. door body. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1-7 As shown, a defect detection method for a flexible circuit board based on multiple detections includes the following steps: using a high temperature folding test device to perform a high temperature resistance performance test and a folding test on the flexible circuit board;

[0035] The high temperature folding test device comprises a body 1, a machine cavity 2 is provided in the body 1, and a folding component and a heat generating component are provided in the machine cavity 2;

[0036] The folding assembly includes a folding seat 7, a motor 13, a rotating wheel 14, a rotating bar 15 and two clamping assemblies. The folding seat 7 is slidably connected to the inner wall of the machine cavity 2. The folding sheet 18, the folding sheet 2 9 and the transmission seat 11 are fixedly connected to the folding seat 7. The transmission seat 11 is provided with a transmission groove 12. The motor 13 is fixedly connected to the inner wall of the machine cavity 2. The rotating wheel 14 is fixedly connected to the output shaft of the motor 13. The rotating wheel 14 is rotatably connected to the rotating wheel 14. The rotating bar 15 is slidably connected to the inner wall of the transmission groove 12. The motor 13 drives the folding sheet 18 and the folding sheet 2 9 to move back and forth up and down to perform multiple folding tests on the flexible circuit board.

[0037] The clamping assembly includes a clamping portion 3, a telescopic rod 4, a mounting plate 5 and an elastic member 6, the mounting plate 5 is fixed to the inner wall of the machine cavity 2, the telescopic rod 4 is fixed to the mounting plate 5, the clamping portion 3 is fixed to the telescopic rod 4, and the clamping portion 3 is connected to the mounting plate 5 through the elastic member 6;

[0038] The heat generating assembly includes a transmission belt 16, a second rotating wheel 17, a spur gear 18, a slide plate 19, an electric heating wire 20 and an air generator 22. The second rotating wheel 17 is rotatably connected to the inner wall of the machine cavity 2. The second rotating wheel 17 is connected to the first rotating wheel 14 through the transmission belt 16. The spur gear 18 is fixedly connected to the second rotating wheel 17. The slide plate 19 is connected to the inner wall of the machine cavity 2. The electric heating wire 20 and the air generator 22 are both fixedly connected to the slide plate 19. The air generator 22 is provided with an air channel 23. A connecting frame 24 is fixedly connected in the air channel 23. A fan blade assembly 25 is rotatably connected to the connecting frame 24. A spur gear 26 is fixedly connected to the fan blade assembly 25. The spur gear 26 extends into the machine cavity 2. The spur gear 18 can drive the spur gear 26 to rotate, so that the wind generated by the rotation of the fan blade assembly 25 drives part of the heat on the electric heating wire 20 to transfer to the flexible circuit board, and the high temperature resistance performance of the flexible circuit board is tested.

[0039] like Figure 1-3 As shown in Figures 5-6, according to an optional embodiment of the present invention, a humidifying component is provided in the machine cavity 2, and the humidifying component includes a permanent magnet plate 27, an electromagnet 28 and a humidifying box 29. The permanent magnet plate 27 is fixedly connected to the bottom wall of the slide plate 19, and the slide plate 19 is slidably connected to the inner wall of the machine cavity 2. The electromagnet 28 is fixedly connected to the inner wall of the machine cavity 2. A humidifying chamber 30 is opened on the humidifying box 29, and the humidifying chamber 30 is filled with liquid. The heating wire 20 can heat the liquid in the humidifying chamber 30 to evaporate it, and the humidity in the machine cavity 2 increases, so as to test the moisture resistance of the flexible circuit board.

[0040] like Figure 1-7 As shown, according to an optional embodiment of the present invention, a scale cleaning component is provided in the machine cavity 2, and the scale cleaning component includes a rotating bar 2 33, a connecting plate 40, a transmission plate 41, a pull line 48, a guide wheel 49, a winding wheel 50 and a spur gear 3 51. The rotating bar 2 33 is rotatably connected to the slide plate 19, and the connecting plate 40 is slidably connected to the inner wall of the machine cavity 2 through a slider 43. Two wiping components are connected to the connecting plate 40, and the wiping components include a guide plate 34, a cleaning plate 35, bristles 36, a transmission sheet 1 37, a transmission sheet 2 38 and an elastic member 2 39. The guide plate 34 is fixed to the connecting plate 40, and the cleaning plate 35 is slidably connected to the guide plate 34. The bristles 36, the transmission sheet 1 37 and the transmission sheet 2 38 are all fixed to the cleaning plate 35. The cleaning plate 35 is connected to the connecting plate 40 through the elastic member 2 39. The transmission plate 41 is fixed to one of the guide plates 34. A transmission channel 42 is provided on 41, and the second rotating bar 33 is slidably connected to the inner wall of the transmission channel 42. A collecting plate 52 is fixedly connected to the connecting plate 40, and a rotating shaft 47 is fixedly connected to the top wall of the collecting plate 52. A transmission rod 44 is rotatably connected to the rotating shaft 47. A transmission wheel 1 45 and a transmission wheel 2 46 are rotatably connected at both ends of the transmission rod 44. The transmission wheel 1 45 extends between the transmission sheet 1 37 and the transmission sheet 2 38 on one of the cleaning plates 35, and the transmission wheel 2 46 extends between the transmission sheet 1 37 and the transmission sheet 2 38 on the other cleaning plate 35. The pull wire 48 is fixedly connected to one of the cleaning plates 35. The guide wheel 49 and the spur gear three 51 are both rotatably connected to the inner wall of the machine cavity 2. The winding wheel 50 is fixedly connected to the spur gear three 51. The pull wire 48 bypasses the guide wheel 49, and the guide wheel 49 and the winding wheel 50 are fixedly connected. A transmission tooth 10 is fixedly connected to the winding seat 7, and the transmission tooth 10 is meshed with the spur gear three 51. The transmission teeth 10 drive the spur gear 3 51 and the winding wheel 50 to reciprocate, and cooperate with the elastic force of the two elastic members 2 39 to enable the bristles 36 on the two guide plates 34 to clean the scale-accumulated part of the heating wire 20 .

[0041] like Figure 3-4As shown, according to an optional embodiment of the present invention, a rack 56 is fixedly connected to the bottom wall of the collection tray 52, a liquid supply pipe 55 is fixedly connected to the humidification chamber 30, the liquid supply pipe 55 extends into the humidification chamber 30, the liquid supply pipe 55 is connected to an external liquid supply system, a stop valve 53 is fixedly connected to the liquid supply pipe 55, and a gear-shaped hand wheel 54 is rotatably connected to the stop valve 53. The rack 56 drives the gear-shaped hand wheel 54 to rotate in different directions, so as to realize the opening and closing of the stop valve 53, thereby controlling the liquid replenishment of the liquid supply pipe 55.

[0042] like Figure 3 As shown, according to an optional embodiment of the present invention, the inner wall of the humidification chamber 30 is fixedly and detachably connected with a splash-proof net 31, and a through hole 32 is opened on the splash-proof net 31. The splash-proof net 31 can prevent the liquid from escaping when it boils, and the through hole 32 facilitates the heating wire 20 to enter and exit the humidification chamber 30.

[0043] like Figure 3 As shown, according to an optional embodiment of the present invention, the heating wire 20 is fixed to the slide plate 19 via a heat-insulating mounting frame 21 .

[0044] like Figure 1 As shown, according to an optional embodiment of the present invention, a door body 59 is movably connected to the body 1 , and opening the door body 59 can facilitate the placement of the flexible circuit board into the machine cavity 2 .

[0045] According to an optional embodiment of the present invention, a data processing module is provided in the body 1, and the data processing module is electrically connected to various electrical components of the device. The data processing module is a module with data processing functions and component control functions, such as an MCS-51 single-chip microcomputer.

[0046] like Figure 2 As shown, according to an optional embodiment of the present invention, a temperature sensor 57 is detachably connected to the inner wall of the machine cavity 2, and the temperature sensor 57 can detect the temperature inside the machine cavity 2 in real time, so that the data processing module controls the heating time inside the machine cavity 2, thereby controlling the temperature range inside the machine cavity 2.

[0047] like Figure 2 As shown, according to an optional embodiment of the present invention, a humidity sensor 58 is detachably connected to the inner wall of the machine cavity 2, and the humidity sensor 58 can detect the humidity in the machine cavity 2 in real time, so that the data processing module controls the humidification time in the machine cavity 2, thereby controlling the humidity range in the machine cavity 2.

[0048] Implementation process:

[0049] In the initial state, the heating wire 20 is inserted into the liquid in the humidifying chamber 30, the spur gear 1 18 and the spur gear 2 26 are separated from each other, and the pull wire 48 is in a relaxed state.

[0050] The flexible circuit board is inserted between the winding and folding piece 1 8 and the winding and folding piece 2 9, and then the two clamping parts 3 are used to clamp the flexible circuit board, and the motor 13 is turned on to drive the rotating wheel 14, the rotating bar 15, the transmission belt 16, the rotating wheel 2 17, and the spur gear 18 to rotate. The rotating bar 15 slides in the transmission groove 12 to drive the transmission seat 11 and the winding and folding seat 7 to move up and down. The winding and folding piece 1 8 and the winding and folding piece 2 9 perform multiple bending tests on the flexible circuit board. The telescopic rod 4 overcomes the elastic force of the elastic piece 6 to reciprocate and extend and contract. The electric heating wire 20 generates heat to heat the liquid, thereby boiling the liquid to generate steam, so that moisture is formed in the machine cavity 2. The flexible circuit board is tested in a wet environment. After a period of time, the processing module controls the electromagnet 28 to start generating magnetic repulsion to the permanent magnet plate 27, so that the connecting frame 24 and the air generator 22 move up to the spur gear 26 and the spur gear 1 18 to mesh, the heating wire 20 moves up to separate from the liquid, the turning bar 2 33 moves up, and the turning bar 2 33 slides in the inclined transmission channel 42 to move the transmission plate 41 and the connecting plate 40 to the right, the liquid stops heating, and the air in the machine cavity 2 stops humidification. The spur gear 1 18 drives the spur gear 2 26 and the fan blade assembly 25 to rotate, and the fan blade assembly 25 rotates to generate wind, and the wind takes away the heating wire 20. Part of the heat inside is transferred to the flexible circuit board, so that the flexible circuit board can be tested in a high temperature environment and the electric heating wire 20 can be prevented from burning dry. When one of the cleaning plates 35 moves to the right, the pull wire 48 is pulled to make the pull wire 48 in a taut state. When the folding seat 7 moves up and down, it will drive the spur gear 3 51 and the winding wheel 50 to rotate back and forth, so that the pull wire 48 pulls the front cleaning plate 35, and the elastic force of the elastic member 2 39 is cooperated to make the front cleaning plate 35 move back and forth left and right. The transmission piece 2 38 and the transmission piece 1 37 on the front cleaning plate 35 drive the transmission rod 44 to rotate back and forth around the rotating shaft 47 through the pull wire 48, so that the transmission wheel 1 45 drives the rear cleaning plate 35 to rotate back and forth. The cleaning plates 35 on the right side move back and forth, and the movement directions of the two cleaning plates 35 are always opposite. After the connecting plate 40 moves to the right, the heating wire 20 is located between the bristles 36 of the two cleaning plates 35. When the two cleaning plates 35 move, the scale on the heating wire 20 is cleaned by the bristles 36, and the scale wiped off falls into the collecting plate 52 for collection. When the connecting plate 40 and the collecting plate 52 move to the right, the rack 56 is driven to move to the right, and the rack 56 is engaged with the gear-shaped handwheel 54 to drive the gear-shaped handwheel 54 to rotate, so that the stop valve 53 is opened, and the external liquid supply system slowly replenishes liquid in the humidification chamber 30 through the liquid supply pipe 55.

[0051] After a period of time, the electromagnet 28 is powered off, the air generator 22 falls again, the slide plate 19 and the heating wire 20 move downward, the connecting plate 40 moves leftward, and the stop valve 53 blocks the liquid supply pipe 55 to stop replenishing the liquid.

[0052] Through the above principle, the internal environment of the machine cavity 2 is alternately heated and humidified to test the high temperature and moisture resistance of the flexible circuit board. The alternating heating and humidification can prevent overheating and excessive humidity. The folding test can detect the durability and reliability of the flexible circuit board during repeated bending and folding.

[0053] The present invention has high linkage and can be driven by a motor 13 to perform multiple winding tests on the flexible circuit board clamped by the clamping part 3, so as to detect whether the performance of the flexible circuit board after multiple bending still meets the standards. It can also drive the heating wire 20 to rise and fall and the fan blade assembly 25 to rotate, so that the liquid in the humidification chamber 30 evaporates to perform humidification operation in the machine cavity 2, and to heat the machine cavity 2, to detect whether the flexible circuit board can still maintain good folding and bending performance in a humid and high temperature environment, to achieve multi-faceted detection, to improve production detection efficiency, and to automatically replenish the liquid in the humidification chamber 30.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A method for detecting defects in a flexible circuit board based on multiple detections, characterized in that: The following steps are involved: Use a high temperature folding test device to perform high temperature resistance and folding tests on flexible circuit boards; The high-temperature folding test device comprises a body (1), a machine cavity (2) is provided in the body (1), and a folding component and a heat generating component are provided in the machine cavity (2); The folding assembly comprises a folding seat (7), a motor (13), a rotating wheel (14), a rotating strip (15) and two clamping assemblies. The folding seat (7) is slidably connected to the inner wall of the machine cavity (2). The folding plate (8), the second folding plate (9) and the transmission seat (11) are fixedly connected to the folding seat (7). The transmission seat (11) is provided with a transmission groove (12). The motor (13) is fixedly connected to the inner wall of the machine cavity (2). The rotating wheel (14) is fixedly connected to the output shaft of the motor (13). The rotating wheel (14) is rotatably connected to the rotating strip (15). The rotating strip (15) is slidably connected to the inner wall of the transmission groove (12). The clamping assembly comprises a clamping portion (3), a telescopic rod (4), a mounting plate (5) and an elastic member 1 (6); the mounting plate (5) is fixedly connected to the inner wall of the machine cavity (2); the telescopic rod (4) is fixedly connected to the mounting plate (5); the clamping portion (3) is fixedly connected to the telescopic rod (4); and the clamping portion (3) is connected to the mounting plate (5) via the elastic member 1 (6); The heat generating assembly comprises a transmission belt (16), a second rotating wheel (17), a spur gear (18), a slide plate (19), an electric heating wire (20) and an air generator (22); the second rotating wheel (17) is rotatably connected to the inner wall of the machine cavity (2); the second rotating wheel (17) is connected to the first rotating wheel (14) via the transmission belt (16); the spur gear (18) is fixedly connected to the second rotating wheel (17); the slide plate (19) is connected to the inner wall of the machine cavity (2); the electric heating wire (20) and the air generator (22) are both fixedly connected to the slide plate (19); an air channel (23) is provided on the air generator (22); a connecting frame (24) is fixedly connected in the air channel (23); a fan blade assembly (25) is rotatably connected to the connecting frame (24); a second spur gear (26) is fixedly connected to the fan blade assembly (25); and the second spur gear (26) extends into the machine cavity (2).

2. According to claim 1, a method for detecting defects in a flexible circuit board based on multiple detections is characterized in that: A humidifying component is provided in the machine cavity (2), the humidifying component comprising a permanent magnetic plate (27), an electromagnet (28) and a humidifying box (29), the permanent magnetic plate (27) being fixedly connected to the bottom wall of the slide plate (19), the slide plate (19) being slidably connected to the inner wall of the machine cavity (2), the electromagnet (28) being fixedly connected to the inner wall of the machine cavity (2), and a humidifying chamber (30) being provided on the humidifying box (29), the humidifying chamber (30) being filled with liquid.

3. The method for detecting defects in a flexible circuit board based on multiple detections according to claim 2 is characterized in that: The machine cavity (2) is provided with a scale cleaning assembly, which comprises a second rotating bar (33), a connecting plate (40), a transmission plate (41), a pull line (48), a guide wheel (49), a winding wheel (50) and a third spur gear (51). The second rotating bar (33) is rotatably connected to the slide plate (19), the connecting plate (40) is slidably connected to the inner wall of the machine cavity (2) via a slider (43), and two wiping assemblies are connected to the connecting plate (40), the wiping assemblies comprising a guide plate (34), a cleaning plate (35), a bristle (36), and a toothed wheel (37). 6), a transmission plate 1 (37), a transmission plate 2 (38) and an elastic member 2 (39), the guide plate (34) is fixedly connected to the connecting plate (40), the cleaning plate (35) is slidably connected to the guide plate (34), the bristles (36), the transmission plate 1 (37) and the transmission plate 2 (38) are all fixedly connected to the cleaning plate (35), the cleaning plate (35) is connected to the connecting plate (40) through the elastic member 2 (39), the transmission plate (41) is fixedly connected to one of the guide plates (34), and a transmission channel ( 42, the second rotating bar (33) is slidably connected to the inner wall of the transmission channel (42), a collecting plate (52) is fixedly connected to the connecting plate (40), a rotating shaft (47) is fixedly connected to the top wall of the collecting plate (52), a transmission rod (44) is rotatably connected to the rotating shaft (47), and a transmission wheel (45) and a transmission wheel (46) are rotatably connected at both ends of the transmission rod (44), the transmission wheel (45) extends to between the transmission sheet (37) and the transmission sheet (38) on one of the cleaning plates (35), and the transmission wheel (46) extends to the other The pull wire (48) is fixedly connected to one of the cleaning plates (35) between the transmission plate 1 (37) and the transmission plate 2 (38) on the cleaning plates (35). The guide wheel (49) and the spur gear 3 (51) are both rotatably connected to the inner wall of the machine cavity (2). The winding wheel (50) is fixedly connected to the spur gear 3 (51). The pull wire (48) bypasses the guide wheel (49). The guide wheel (49) and the winding wheel (50) are fixedly connected. The winding seat (7) is fixedly connected with a transmission tooth (10), and the transmission tooth (10) and the spur gear 3 (51) are meshed.

4. The method for detecting defects in a flexible circuit board based on multiple detections according to claim 3 is characterized in that: A rack (56) is fixedly connected to the bottom wall of the collecting plate (52), a liquid supply pipe (55) is fixedly connected to the humidifying chamber (30), the liquid supply pipe (55) extends into the humidifying chamber (30), the liquid supply pipe (55) is connected to an external liquid supply system, a stop valve (53) is fixedly connected to the liquid supply pipe (55), and a gear-shaped hand wheel (54) is rotatably connected to the stop valve (53).

5. The method for detecting defects in a flexible circuit board based on multiple detections according to claim 4 is characterized in that: The inner wall of the humidification chamber (30) is fixedly and detachably connected to a splash-proof screen (31), and a through hole (32) is provided on the splash-proof screen (31).

6. The method for detecting defects in a flexible circuit board based on multiple detections according to claim 5 is characterized in that: The heating wire (20) is fixedly connected to the slide plate (19) via a heat-insulating mounting frame (21).

7. A method for detecting defects in a flexible circuit board based on multiple detections according to claim 6, characterized in that: A door body (59) is movably connected to the fuselage (1).

8. The method for detecting defects in a flexible circuit board based on multiple detections according to claim 7 is characterized in that: A data processing module is provided in the fuselage (1).

9. A method for detecting defects in a flexible circuit board based on multiple detections according to any one of claims 1 to 8, characterized in that: A temperature sensor (57) is detachably connected to the inner wall of the machine cavity (2).

10. A method for detecting defects in a flexible circuit board based on multiple detections according to any one of claims 2 to 8, characterized in that: A humidity sensor (58) is detachably connected to the inner wall of the machine cavity (2).

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