A FPC flexible circuit board bending and straightening equipment

Abstract

The present invention relates to the technical field of FPC circuit board production, and in particular to a FPC flexible circuit board bending and straightening device, comprising an operating table, a punching table and a punching machine, wherein a punching table is arranged in the middle of the operating table, a punching slot is provided in the middle of the punching table, the punching machine is connected to the operating table and is located above the punching slot, and further comprises a punching mechanism and a leveling component, wherein the punching mechanism comprises a mounting plate, a pressing bracket, a contact plate and a positioning component, wherein the mounting plate is fixedly connected to the telescopic end of the punching machine, the pressing bracket is fixedly connected below the mounting plate, a connecting shaft is arranged at the bottom end of the pressing bracket, the contact plate is slidably connected in the pressing bracket and is limited by the connecting shaft. During the period when the punching machine drives the pressing bracket to move downward, the middle part of the FPC flexible circuit board is bent downward by the contact plate, and when the contact plate fits the middle part of the FPC flexible circuit board to the bottom surface of the punching slot, the push rod pushes the positioning roller to both sides, and the positioning roller accurately bends the bent part of the FPC flexible circuit board.

Description

Technical Field

[0001] The invention relates to the technical field of FPC circuit board production, and in particular to a FPC flexible circuit board bending and straightening device. Background Art

[0002] Bending machines play a vital role in the processing of FPC boards. These devices are specially designed to perform precise bending processing on FPC flexible circuit boards to meet the needs of various complex circuit designs and product integration. However, in actual operation, especially in the early stages of processing the same batch of FPC flexible circuit boards, it is often necessary to make multiple fine adjustments to the impact rate of the bending machine.

[0003] This is because FPC flexible circuit boards, as a flexible material, have great differences and complexity in their deformation stress. Even within the same batch, the deformation stress of different FPC flexible circuit boards may be different due to slight differences in material texture, manufacturing process and other factors. Therefore, in order to ensure the accuracy and reliability of the bending process and avoid cracks or other forms of damage during the bending process, it is necessary to accurately control the impact rate of the bending machine.

[0004] In the early stage of processing, operators usually make a preliminary setting of the impact rate of the bending machine according to the actual situation and process requirements of the FPC flexible circuit board. However, due to the uncertainty and variability of deformation stress, this preliminary setting is often difficult to achieve the ideal processing effect. At this time, it is necessary to adjust the impact rate of the bending machine multiple times to gradually approach a state of balance with the deformation stress of the FPC flexible circuit board. This adjustment process usually needs to be repeated. The operator needs to closely observe the performance of the FPC flexible circuit board during the bending process and fine-tune the impact rate of the bending machine according to the actual situation. Through continuous trial and error, an impact rate that matches the deformation stress of the FPC flexible circuit board can be found to ensure the smooth progress of the bending process.

[0005] However, this process of adjusting the impact rate of the bending machine multiple times will undoubtedly have a certain impact on production efficiency. During the adjustment process, it takes a certain amount of time and manpower costs, and it may also increase the wear and tear of the equipment and the risk of failure.

[0006] In view of the situation that the bending machine needs to adjust the impact rate multiple times to adapt to FPC flexible circuit boards of different specifications, this device proposes a bending device for auxiliary guiding the FPC flexible circuit board. Summary of the invention

[0007] In order to overcome the above shortcomings, the present invention provides a FPC flexible circuit board bending and straightening device.

[0008] A FPC flexible circuit board bending and straightening device includes an operating table, a punching table and a punching machine. The operating table is provided with a punching table in the middle, and a punching slot is provided in the middle of the punching table. The punching slot is a U-shaped slot. The punching machine is connected to the operating table and is located above the punching slot. The punching machine is an electric push rod structure, and also includes a punching mechanism and a leveling component. The punching mechanism includes a mounting plate, a pressing bracket, a contact plate and a positioning component. The mounting plate is fixedly connected to the telescopic end of the punching machine, and the pressing bracket is fixedly connected to the bottom of the mounting plate. A connecting shaft is provided at the bottom end of the pressing bracket. The contact plate is slidably connected in the pressing bracket and is limited by the connecting shaft. The contact plate is used to bend the FPC flexible circuit board. The contact plate and the pressing bracket are A first reset spring is connected between the two, and the positioning assembly includes a positioning roller and a pushing rod. The positioning roller is rotatably connected to the connecting shaft through the pushing rod. The pushing rod is a two-link rod hinged at the middle end, and the end hinge point is rotatably connected to the end of the connecting shaft. Both ends of the two links are rotatably connected to the positioning rollers. A reset telescopic rod is arranged between the positioning rollers for guiding. The end of the reset telescopic rod is rotatably connected to the positioning roller. The positioning roller positions the bent portion of the FPC flexible circuit board. The leveling assembly includes a lifting plate and a pressing plate. The lifting plate is fixed to the mounting plate, and the pressing plate is slidably connected to the bottom surface of the lifting plate. A second reset spring is connected between the pressing plate and the lifting plate, and the pressing plate presses and flattens the unbent portion of the FPC flexible circuit board.

[0009] As an improvement of the above solution, the contact plate and the positioning roller are both made of rubber material.

[0010] As an improvement of the above scheme, a pressing roller is also included. The pressing roller is rotatably connected to the inside of the pressing plate and protrudes from the bottom surface of the pressing plate. The pressing roller can reduce the friction coefficient between the pressing plate and the FPC flexible circuit board, thereby reducing the surface scratches of the PFC board caused by the pressing plate.

[0011] As an improvement of the above scheme, it also includes a fixed plate, a movable table, a rack, a gear shaft, a feed plate, a feed roller and a transmission assembly. The fixed plate is horizontally placed and fixedly connected to the inner cavity of the operating table. The movable table is slidably connected to the fixed plate and slidably connected to the stamping table and located in the stamping groove. The contact plate can push the movable table. A rack is fixed in the movable table. The gear shaft is rotatably connected to the fixed plate. The rack and the gear shaft are meshed with each other. The feed plate is arranged on the end face of the stamping table. A feed roller is rotatably arranged on the surface of the feed plate. The gear shaft transmits the feed roller through the transmission assembly.

[0012] As an improvement of the above solution, the transmission assembly consists of two pulley groups, one of which is connected between the gear shaft and the feed roller, and the other is connected to the adjacent feed roller for transmission.

[0013] As an improvement of the above scheme, it also includes an auxiliary bracket, a first auxiliary roller and a second auxiliary roller. The auxiliary bracket is symmetrically fixed to the pressing bracket, the first auxiliary roller is rotatably connected to the lower end of the auxiliary bracket, and the second auxiliary roller is rotatably connected to the middle part of the auxiliary bracket through the connecting bracket, and a torsion spring is connected between the connecting bracket and the auxiliary bracket.

[0014] As an improvement of the above scheme, it also includes a screw rod, a limit rail, a positioning clamp and a rubber head. The screw rod is rotatably connected in the operating table, the positioning clamp is connected to the screw rod by a thread, and the limit rail fixed to the operating table limits and guides the positioning clamp. The positioning clamp is connected to a retractable rubber head, which passes through the feeding plate and can limit the front and rear ends of the FPC flexible circuit board.

[0015] As an improvement of the above solution, symmetrical threads are provided on the screw rod, and the positioning clamps are respectively connected to the symmetrical threads.

[0016] The beneficial effects achieved by the present invention are as follows: 1. During the period when the punching machine drives the pressing bracket to move downward, the middle part of the FPC flexible circuit board is bent downward by the contact plate. After the contact plate fits the middle part of the FPC flexible circuit board to the bottom surface of the punching groove, the pressing bracket will continue to move downward relative to the contact plate, thereby pushing the positioning roller to both sides through the push rod, and the positioning roller will accurately bend the bent part of the FPC flexible circuit board, so that the FPC flexible circuit board can fit tightly in the punching groove. At the same time, the pressing plate will press and flatten the unbent part of the FPC flexible circuit board, so that the FPC flexible circuit board can be bent to an ideal shape. The device adopts non-one-time stamping and bending technology to effectively reduce the local stress of the FPC flexible circuit board during bending processing, improve the stamping protection of the FPC flexible circuit board, greatly reduce the number of debugging times of the punching machine, and thus improve the production efficiency and quality of the FPC flexible circuit board.

[0017] 2. The contact plate pushes the moving platform downward through the FPC flexible circuit board, and finally drives the left and right feeding rollers to rotate in opposite directions. The feeding rollers will cooperate with the pressing plate and the pressing roller to provide a force to move the unbent part of the FPC flexible circuit board toward the middle, making the deformation movement of the two sides of the FPC flexible circuit board moving toward the middle due to the downward bending of the middle part smoother, and also reducing the breakage of the FPC flexible circuit board due to excessive local stress.

[0018] 3. A first auxiliary roller and a second auxiliary roller are provided to provide lateral and longitudinal thrusts to the upper bending portion of the FPC flexible circuit board, thereby pushing the upper bending portion of the FPC flexible circuit board to fit closely to the side wall of the stamping groove, thereby improving the bending accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a cross-sectional view of the three-dimensional structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the punching mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure when the push rod of the present invention pushes the positioning roller to move to both sides.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the leveling assembly of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the pressing roller of the present invention.

[0025] Figure 7 It is a three-dimensional structural cross-sectional view of the movable platform and the feeding plate of the present invention.

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the rack, gear shaft, feed roller and transmission assembly of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the first auxiliary roller and the second auxiliary roller of the present invention.

[0028] Fig.10 It is a three-dimensional structural schematic diagram of the screw rod and the positioning clamp block of the present invention.

[0029] Names of the numbers in the figure: 1. operating table, 101. punching table, 102. punching groove, 2. punching machine, 3. mounting plate, 4. pressing bracket, 401. connecting shaft, 5. contact plate, 501. first reset spring, 6. positioning roller, 7. pushing rod, 701. reset telescopic rod, 8. lifting plate, 9. pressing plate, 901. second reset spring, 10. pressing roller, 11. fixed plate, 12. moving table, 13. rack, 14. gear shaft, 15. feeding plate, 16. feeding roller, 17. transmission assembly, 18. auxiliary bracket, 19. first auxiliary roller, 20. second auxiliary roller, 2001. torsion spring, 21. screw rod, 22. limiting rail, 23. positioning clamp, 24. rubber head. DETAILED DESCRIPTION

[0030] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0031] Embodiment: A FPC flexible circuit board bending and straightening device, such as Figure 1-Figure 6 As shown, it includes an operating table 1, a punching table 101 and a punching machine 2. The punching table 101 is arranged in the middle of the operating table 1. A punching slot 102 is opened in the middle of the punching table 101. The punching slot 102 is a U-shaped slot. The punching machine 2 is connected to the operating table 1 and is located above the punching slot 102. The punching machine 2 is an electric push rod structure, and also includes a punching mechanism and a leveling component. The punching mechanism includes a mounting plate 3, a pressing bracket 4, a contact plate 5 and a positioning component. The mounting plate 3 is fixedly connected to the telescopic end of the punching machine 2, and the pressing bracket 4 is fixedly connected below the mounting plate 3. A connecting shaft 401 is arranged at the bottom end of the pressing bracket 4. The contact plate 5 is slidably connected in the pressing bracket 4 and is limited by the connecting shaft 401. The contact plate 5 is used to bend the FPC flexible circuit board. A first reset spring 501 is connected between the contact plate 5 and the pressing bracket 4. The positioning component includes a fixed The positioning roller 6 and the pushing rod 7 are rotatably connected to the connecting shaft 401 through the pushing rod 7. The contact plate 5 and the positioning roller 6 are both made of rubber material, and the flexible contact with the FPC flexible circuit board reduces the rigid damage. The pushing rod 7 is a two-link rod hinged at the middle end, wherein the end hinge point is rotatably connected to the end of the connecting shaft 401, and the two ends of the two-link rod are rotatably connected to the positioning roller 6. A reset telescopic rod 701 is arranged between the positioning rollers 6 for guiding, and the end of the reset telescopic rod 701 is rotatably connected to the positioning roller 6. The positioning roller 6 positions the bent portion of the FPC flexible circuit board. The leveling component includes a lifting plate 8 and a pressing plate 9. The lifting plate 8 is fixed to the mounting plate 3, and the pressing plate 9 is slidably connected to the bottom surface of the lifting plate 8. A second reset spring 901 is connected between the pressing plate 9 and the lifting plate 8, and the pressing plate 9 presses and levels the unbent portion of the FPC flexible circuit board.

[0032] like Figure 6As shown, it also includes a pressing roller 10, which is rotatably connected to the inside of the pressing plate 9 and protrudes from the bottom surface of the pressing plate 9. The pressing roller 10 can reduce the friction coefficient between the pressing plate 9 and the FPC flexible circuit board, thereby reducing the pressing scratches on the surface of the PFC board by the pressing plate 9. When the contact plate 5 presses the FPC flexible circuit board to the bottom surface of the punching groove 102, the contact plate 5 pushes the first return spring 501 to compress, and at this time the push rod 7 will rotate, and the push rod 7 will push the positioning roller 6 to roll to the left and right sides, and the positioning roller 6 will also position and press the FPC flexible circuit board to make it The bent portion can be accurately fitted into the inner wall of the punching groove 102. At the same time, the pressing plate 9 that moves downward synchronously with the lifting plate 8 will press and flatten the unbent portion of the FPC flexible circuit board, so that the FPC flexible circuit board reaches the specified shape that fits the punching groove 102. When the positioning roller 6 moves to the extreme position, the bending process of the FPC flexible circuit board is completed, the punching machine 2 moves up and first retracts the reset telescopic rod 701. After the positioning roller 6 is reset, the first reset spring 501 is extended to reset the contact plate 5. Finally, the punching machine 2 moves to the initial position to complete the bending of the FPC flexible circuit board.

[0033] like Figure 2 , Figure 7 and Figure 8 As shown, it also includes a fixed plate 11, a moving table 12, a rack 13, a gear shaft 14, a feeding plate 15, a feeding roller 16 and a transmission assembly 17. The fixed plate 11 is horizontally placed and fixedly connected to the inner cavity of the operating table 1. The moving table 12 is slidably connected to the fixed plate 11 and slidably connected to the punching table 101 and is located in the punching groove 102. The contact plate 5 can push the moving table 12. The moving table 12 is fixedly connected with a rack 13. The gear shaft 14 is rotatably connected to the fixed plate 11. The rack 13 and the gear shaft 14 are meshed with each other. The feeding plate 15 is arranged on the end face of the punching table 101. The feeding roller 16 is rotatably arranged on the surface of the feeding plate 15. The gear shaft 14 transmits the feeding roller 16 through the transmission assembly 17. The transmission assembly 17 is composed of two groups of pulley groups, one of which is connected between the gear shaft 14 and the feeding roller 16, and the other is connected between the gear shaft 14 and the feeding roller 16. The transmission is carried out on the adjacent feeding rollers 16, so its complete action is that the punching machine 2 pushes the mounting plate 3 to move downward, the pressing bracket 4 moves synchronously with the mounting plate 3, the bottom of the contact plate 5 contacts the FPC flexible circuit board and presses its middle part downward to bend it, and the contact plate 5 pushes the moving platform 12 to move downward through the FPC flexible circuit board. During this period, the rack 13 in the moving platform 12 drives the gear shaft 14 to rotate, and the gear shaft 14 drives the left and right feeding rollers 16 to rotate in opposite directions through the transmission component 17. The feeding roller 16 will cooperate with the pressing plate 9 and the pressing roller 10 to provide a force to move the unbent part of the FPC flexible circuit board toward the middle, so that the deformation action of the two sides of the FPC flexible circuit board moving toward the middle due to the downward bending of the middle part is smoother, and the breakage of the FPC flexible circuit board due to excessive local stress is also reduced.

[0034] like Fig. 9 As shown, it also includes an auxiliary bracket 18, a first auxiliary roller 19 and a second auxiliary roller 20. The auxiliary bracket 18 is symmetrically fixed to the pressing bracket 4. The first auxiliary roller 19 is rotatably connected to the lower end of the auxiliary bracket 18. The second auxiliary roller 20 is rotatably connected to the middle of the auxiliary bracket 18 through the connecting bracket, and a torsion spring 2001 is connected between the connecting bracket and the auxiliary bracket 18. Since the FPC flexible circuit board is bent downward, the FPC flexible circuit board will be in a concave shape, and its upper bending part can be carried out by the first auxiliary roller 19 and the second auxiliary roller 20 cooperating with each other, that is, when the auxiliary bracket 18 moves downward with the pressing bracket 4, the first auxiliary roller 19 can press and limit the lateral direction of the upper bending part of the FPC flexible circuit board, and the second auxiliary roller 20 can cooperate with the first auxiliary roller 19 to press and limit the vertical direction of the upper bending part of the FPC flexible circuit board, thereby pushing the upper bending part of the FPC flexible circuit board to closely fit the side wall of the stamping groove 102, thereby improving the bending accuracy.

[0035] like Figure 2 and Fig.10 As shown, it also includes a screw rod 21, a limiting rail 22, a positioning clamp 23 and a rubber head 24. The screw rod 21 is rotatably connected to the operating table 1. The positioning clamp 23 is connected to the screw rod 21 by a thread. The limiting rail 22 fixed to the operating table 1 moves and limits and guides the positioning clamp 23. The positioning clamp 23 is connected to a retractable rubber head 24. The rubber head 24 passes through the feeding plate 15. The rubber head 24 can limit the front and rear ends of the FPC flexible circuit board to prevent the FPC flexible circuit board from deviating when being bent. The screw rod 21 is provided with a hexagonal head at the end thereof, and the staff rotates the screw rod 21 through a specific tool. Since the screw rod 21 is provided with symmetrical threads, and the front and rear end positioning clamps 23 are respectively connected to the symmetrical threads, the positioning clamps 23 can be controlled to move in opposite or reverse directions by rotating the screw rod 21, so as to make instant adjustments according to the specifications of the FPC flexible circuit board actually produced, so that the positioning clamps 23 can limit the FPC flexible circuit board, thereby improving the accuracy of the FPC flexible circuit board bending process.

[0036] Working principle: The FPC flexible circuit board to be bent is placed horizontally on the feeding plate 15 of the punching table 101. The staff rotates the screw rod 21 through the tool to drive the positioning clamp 23 to move in opposite directions to limit the front and rear ends of the FPC flexible circuit board, and then turns on the punching machine 2. The punching machine 2 pushes the mounting plate 3 to move downward, and the pressing bracket 4 moves synchronously with the mounting plate 3. The bottom of the contact plate 5 contacts the FPC flexible circuit board and presses the middle part downward to bend it. At the same time, the pressing plate 9 that moves downward synchronously with the lifting plate 8 will press the FPC flexible circuit board. The unbent part of the PC flexible circuit board is pressed and flattened, so that the FPC flexible circuit board reaches the specified shape that fits the punching groove 102. The contact plate 5 pushes the moving platform 12 downward through the FPC flexible circuit board. During this period, the rack 13 in the moving platform 12 drives the gear shaft 14 to rotate. The gear shaft 14 drives the left and right feeding rollers 16 to rotate in opposite directions through the transmission component 17. The feeding rollers 16 will cooperate with the pressing plate 9 and the pressing roller 10 to move the unbent part of the FPC flexible circuit board toward the middle. When the contact plate 5 pushes the FPC flexible circuit board After the circuit board is pressed to the bottom surface of the punching groove 102, the contact plate 5 pushes the first return spring 501 to compress, and at this time the push rod 7 will rotate, and the push rod 7 will push the positioning roller 6 to roll to the left and right sides, and the positioning roller 6 will also position and press the FPC flexible circuit board so that its bent part can be accurately embedded in the inner wall of the punching groove 102. When the auxiliary bracket 18 moves downward with the pressing bracket 4, the first auxiliary roller 19 can press and limit the lateral direction of the upper bent part of the FPC flexible circuit board, and the second auxiliary roller 20 can It is able to cooperate with the first auxiliary roller 19 to press and limit the longitudinal direction of the upper bending part of the FPC flexible circuit board, thereby improving the upper bending part of the FPC flexible circuit board to fit closely to the side wall of the punching groove 102. When the positioning roller 6 moves to the limit position, the bending process of the FPC flexible circuit board is completed, the punching machine 2 moves up and first retracts the reset telescopic rod 701. After the positioning roller 6 is reset, the first reset spring 501 is extended to reset the contact plate 5. Finally, the punching machine 2 moves to the initial position to complete the bending of the FPC flexible circuit board.

[0037] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An FPC flexible circuit board bending and straightening device, comprising an operating table (1), a punching table (101) and a punching machine (2), wherein the punching table (101) is arranged in the middle of the operating table (1), a punching groove (102) is opened in the middle of the punching table (101), and the punching machine (2) is connected to the operating table (1) and is located above the punching groove (102), wherein the punching machine (2) is connected to the operating table (1) and is located above the punching groove (102), and ... The invention also comprises a punching mechanism and a leveling component. The punching mechanism comprises a mounting plate (3), a pressing bracket (4), a contact plate (5) and a positioning component. The mounting plate (3) is fixedly connected to the telescopic end of the punching machine (2). The pressing bracket (4) is fixedly connected below the mounting plate (3). A connecting shaft (401) is arranged at the bottom end of the pressing bracket (4). The contact plate (5) is slidably connected in the pressing bracket (4) and is limited by the connecting shaft (401). The contact plate (5) is used to bend the FPC flexible circuit board. The contact plate (5) and the pressing bracket (401) are connected to each other. 4), a first return spring (501) is connected between the two parts, the positioning assembly comprises a positioning roller (6) and a push rod (7), the positioning roller (6) is rotatably connected to the connecting shaft (401) through the push rod (7), the positioning roller (6) positions the bending portion of the FPC flexible circuit board, the leveling assembly comprises a lifting plate (8) and a pressing plate (9), the lifting plate (8) is fixedly connected to the mounting plate (3), the pressing plate (9) is slidably connected to the bottom surface of the lifting plate (8), a second return spring (901) is connected between the pressing plate (9) and the lifting plate (8), and the pressing plate (9) is slidably connected to the bottom surface of the lifting plate (8). The pressing plate (9) presses and flattens the unbent portion of the FPC flexible circuit board; the contact plate (5) and the positioning roller (6) are both made of rubber material; the pressing roller (10) is also included, and the pressing roller (10) is rotatably connected to the pressing plate (9); the fixing plate (11), the moving platform (12), the rack (13), the gear shaft (14), the feeding plate (15), the feeding roller (16) and the transmission assembly (17); the fixing plate (11) is horizontally placed and fixedly connected to the inner cavity of the operating platform (1); the moving platform (12) is slidably connected to the fixing plate (11) The movable platform (12) is mounted on the stamping platform (101) and is slidably connected to the stamping platform (101) and is located in the stamping groove (102). The contact plate (5) can push the movable platform (12). A rack (13) is fixedly connected to the movable platform (12). The gear shaft (14) is rotatably connected to the fixed plate (11). The rack (13) and the gear shaft (14) are meshed with each other. A feeding plate (15) is arranged on the end face of the stamping platform (101). A feeding roller (16) is rotatably arranged on the surface of the feeding plate (15). The gear shaft (14) transmits the feed roller (16) through a transmission component (17).

2. The FPC flexible circuit board bending and straightening device as claimed in claim 1, characterized in that: The transmission assembly (17) is composed of two pulley groups, one of which is connected between the gear shaft (14) and the feed roller (16), and the other is connected to the adjacent feed roller (16) for transmission.

3. The FPC flexible circuit board bending and straightening device as claimed in claim 2, characterized in that: It also includes an auxiliary bracket (18), a first auxiliary roller (19) and a second auxiliary roller (20), wherein the auxiliary bracket (18) is symmetrically fixed to the pressing bracket (4), the first auxiliary roller (19) is rotatably connected to the lower end of the auxiliary bracket (18), and the second auxiliary roller (20) is rotatably connected to the middle part of the auxiliary bracket (18) via a connecting bracket, and a torsion spring (2001) is connected between the connecting bracket and the auxiliary bracket (18).

4. The FPC flexible circuit board bending and straightening device as claimed in claim 3, characterized in that: The invention also comprises a screw rod (21), a limiting rail (22), a positioning clamp block (23) and a rubber head (24), wherein the screw rod (21) is rotatably connected to the operating table (1), the positioning clamp block (23) is connected to the screw rod (21) by means of a thread, the limiting rail (22) fixed to the operating table (1) performs movement limiting and guiding on the positioning clamp block (23), the positioning clamp block (23) is connected to a retractable rubber head (24), and the rubber head (24) passes through the feeding plate (15).

5. The FPC flexible circuit board bending and straightening device as claimed in claim 4, characterized in that: Symmetrical threads are formed on the screw rod (21), and the positioning clamps (23) are respectively connected to the symmetrical threads.

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