Jig for punching flexible circuit board

Abstract

The utility model provides a jig for punching a flexible circuit board, and belongs to the technical field of flexible circuit board processing jigs. Comprising a punching plate, when a flexible circuit board needs to be punched, a support, a rotating shaft and a pressing roller are moved to one side of a first limiting block, then the flexible circuit board penetrates through the bottom of the pressing roller to penetrate into the side face of a square rod, a rotary knob is rotated, and a screw rod is driven to rotate; and the interior of the bearing is rotationally connected with the screw rod, so that the square rod and the pressing block move downwards when the screw rod rotates, the side, which does not need to be punched, of the flexible circuit board is fixed, and after one side of the flexible circuit board is fixed, the flexible circuit board is fixed through the movable bracket. And the rotating shaft and the pressing roller are driven to move to the side, close to the flexible circuit board, of the second limiting block, and the pressing roller rolls at the top of the flexible circuit board while moving, so that the flexible circuit board can be better flattened.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible printed circuit board processing fixtures, and particularly relates to a fixture for punching flexible printed circuit boards. Background Art

[0002] A flexible printed circuit board is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film, with the characteristics of high wiring density, light weight, thin thickness, and good bendability. In order to meet the installation and electrical connection requirements of flexible printed circuit boards, it is necessary to punch holes in the flexible printed circuit boards. When punching holes in the flexible printed circuit boards, the flexible printed circuit boards are placed on the punching fixtures, and then the fixtures and the flexible printed circuit boards are placed into the punching equipment for punching.

[0003] In the patent with the published authorization announcement number of CN218313918U, the utility model discloses a fixture for punching flexible printed circuit boards, which includes a punching tool and a support base located below the punching tool. The punching tool includes a cutting edge, and the support base is provided with a chip discharge port corresponding to the cutting edge. The chip discharge port includes a straight-through section and a trumpet section that are connected and communicated. One end of the straight-through section communicates with the top surface of the support base, the straight-through section is adapted to the cutting edge, the trumpet section is overall trumpet-shaped, the small end of the trumpet section communicates with the bottom end of the straight-through section, and the large end of the trumpet section communicates with the bottom surface of the support base. The chip discharge port includes a straight-through section and a trumpet section that are connected and communicated. The presence of the trumpet section can effectively improve the phenomenon that the punching waste of the flexible printed circuit board accumulates and blocks the chip discharge port, so that the chip discharge port can discharge chips more smoothly, reduce the phenomenon of waste pollution and secondary pressing damage to the flexible printed circuit board, facilitate improving production efficiency, ensuring production quality, reducing the defective rate of flexible printed circuit board production, saving manpower, and saving manufacturing costs.

[0004] During the use of the above device, during the process of punching holes in the flexible printed circuit board, the flexible printed circuit board has good bendability and light weight, and is relatively easy to deform. Since the punching fixture lacks a mechanism for positioning the flexible printed circuit board, when the cutting edge contacts the flexible printed circuit board during the punching process, the flexible printed circuit board will bend and deform or shift on the punching board, thus affecting the punching accuracy of the flexible printed circuit board. Therefore, this application provides a fixture for punching flexible printed circuit boards to meet the requirements. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a fixture for punching flexible printed circuit boards to solve the problem of low punching accuracy of flexible printed circuit boards.

[0006] To solve the above technical problem, the utility model provides the following technical solutions:

[0007] A fixture for punching flexible printed circuit boards, comprising a punching plate on which the flexible printed circuit board is placed. A receiving groove is formed in the punching plate, and a square rod is slidably connected in the receiving groove. A screw rod is threadedly connected to the top of the square rod, and the bottom of the screw rod is rotatably connected to the bottom of the inner wall of the receiving groove. The top of the screw rod is fixedly connected with a knob. A pressing block is fixedly connected to the side of the square rod. One side of the flexible printed circuit board is in contact with the side of the square rod, and the pressing block presses on the flexible printed circuit board. A guiding mechanism is arranged on the top of the punching plate. A bracket is arranged on the punching plate, and a sliding groove is formed in the top of the punching plate. The bottom of the bracket is slidably connected to the inner wall of the sliding groove. A rotating shaft is rotatably connected inside the bracket, and a pressing roller is fixedly sleeved on the rotating shaft. The flexible printed circuit board is in contact with the bottom of the pressing roller. A locking mechanism is arranged on the top of the bracket, and the locking mechanism is used for locking the bracket and the pressing roller.

[0008] As a preferred technical solution of the present utility model: The guiding mechanism includes a guiding rod. A first limiting block and a second limiting block are respectively fixed on the top of the punching plate. The guiding rod is fixedly connected between the first limiting block and the second limiting block. The bracket is slidably sleeved on the guiding rod. The side of the limiting block is slidably connected to the side of the pressing block, and the side of the limiting block is in contact with the side of the bracket away from the pressing block.

[0009] As a preferred technical solution of the present utility model: The locking mechanism includes sliders slidably connected to the side of the bracket. The number of the sliders is two. A connecting block is fixedly connected to the side of the slider away from the bracket. A locking groove is formed in the top of the punching plate, and the bottom of the connecting block is inserted into the locking groove. A connecting plate is fixedly connected between the two sliders. The connecting plate is located on the top of the bracket. A threaded rod is threadedly connected to the top of the connecting plate. The bottom of the threaded rod is rotatably connected to the top of the bracket. The top of the threaded rod is fixedly connected with a turning handle. The end of the rotating shaft movably penetrates through the bracket and is fixedly connected with a disc. An arc-shaped groove is formed in the bottom of the slider. The top of the disc is in contact with the inner wall of the arc-shaped groove.

[0010] As a preferred technical solution of the present utility model: An arc-shaped convex portion is arranged on the circumferential surface of the disc, and an arc-shaped concave portion adapted to the shape of the arc-shaped convex portion is arranged in the arc-shaped groove. The arc-shaped convex portion is in contact with the arc-shaped concave portion.

[0011] As a preferred technical solution of the present utility model: First inclined portions are arranged on both sides of the disc. The arc-shaped convex portion is located between the two first inclined portions, and the first inclined portion is connected to the arc-shaped convex portion. A second inclined portion adapted to the shape of the first inclined portion is arranged in the arc-shaped groove. The first inclined portion is in contact with the second inclined portion.

[0012] As a preferred technical solution of the present utility model: a first inclined surface is provided at a position close to the bottom on the side surface of the connecting block, and a second inclined surface adapted to the first inclined surface is provided on the inner wall of the locking groove, and the first inclined surface is in contact with the second inclined surface.

[0013] As a preferred technical solution of the present utility model: a rubber sleeve is fixedly sleeved on the circumferential surface of the pressure roller.

[0014] As a preferred technical solution of the present utility model: two guide blocks are fixedly connected to the top of the punching plate, and both ends of the square rod are slidably connected to the opposite surfaces of the two guide blocks.

[0015] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0016] In the above solution, by arranging a square rod, a rotating shaft and a pressure roller on the top of the punching plate, when punching a flexible circuit board, one side of the flexible circuit board is fixed by the square rod, and then the bracket is moved to the other side of the flexible circuit board that does not need to be punched to fix the other side of the flexible circuit board that does not need to be punched. During the movement of the bracket, the pressure roller rolls on the surface of the flexible circuit board, which can better flatten the flexible circuit board, prevent the flexible circuit board from bending, and can better fix the flexible circuit board on the punching plate, prevent the flexible circuit board from shifting during the punching process, and is beneficial to improving the accuracy of the flexible circuit board during punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present disclosure and, together with the specification, are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0018] Figure 1 is a three-dimensional structural schematic diagram of a fixture for punching a flexible circuit board;

[0019] Figure 2 is a side three-dimensional structural schematic diagram of a fixture for punching a flexible circuit board;

[0020] Figure 3 is a cross-sectional structural schematic diagram of the square rod;

[0021] Figure 4 is a cross-sectional structural schematic diagram of the bracket;

[0022] Figure 5 is Figure 4 the enlarged structural schematic diagram at A in

[0023] Figure 6 is a cross-sectional structural schematic diagram of the punching plate and the connecting block.

[0024] [Attached drawing reference signs]

[0025] 1. Punching plate; 2. Flexible printed circuit board; 3. Square rod; 4. Screw rod; 5. Knob; 6. Guide block; 7. Guide mechanism; 71. First limit block; 72. Guide rod; 73. Second limit block; 8. Chute; 9. Bracket; 10. Rotating shaft; 11. Pressing roller; 12. Locking mechanism; 121. Locking groove; 1211. Second inclined surface; 122. Slide block; 123. Connecting plate; 124. Threaded rod; 125. Turning handle; 126. Disc; 1261. Arc-shaped convex part; 1262. First inclined part; 127. Connecting block; 1271. First inclined surface; 128. Arc-shaped groove; 1281. Arc-shaped concave part; 1282. Second inclined part; 13. Pressing block; 14. Accommodating groove; 15. Rubber sleeve.

[0026] As shown in the figure, in order to clearly implement the structure of the embodiments of the present utility model, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present utility model to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications still fall within the scope of the appended claims. Detailed implementation manners

[0027] The following will describe in detail a fixture for punching flexible printed circuit boards provided by the present utility model in conjunction with the attached drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the attached drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present utility model.

[0028] It should be pointed out that in the specification, when referring to "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc., it indicates that the described embodiment may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, when combining an embodiment to describe a specific feature, structure or characteristic, implementing such a feature, structure or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0029] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, depending at least in part on the context, can alternatively allow for the existence of other factors that are not necessarily explicitly described.

[0030] As Figure 1 shown, an embodiment of the present utility model provides a fixture for punching a flexible circuit board, including a punching plate 1, the flexible circuit board 2 is placed on the punching plate 1, a receiving groove 14 is formed in the punching plate 1, a square rod 3 is slidably connected in the receiving groove 14, a screw rod 4 is threadedly connected to the top of the square rod 3, the bottom of the screw rod 4 is rotatably connected to the bottom of the inner wall of the receiving groove 14, a knob 5 is fixedly connected to the top of the screw rod 4, a pressing block 13 is fixedly connected to the side of the square rod 3, one end of the flexible circuit board 2 is attached to the side of the square rod 3, the pressing block 13 presses on the flexible circuit board 2, a guiding mechanism 7 is arranged on the top of the punching plate 1, the guiding mechanism 7 includes a guiding rod 72, a first limiting block 71 and a second limiting block 73 are respectively fixedly arranged on the top of the punching plate 1, the guiding rod 72 is fixedly connected between the first limiting block 71 and the second limiting block 73, a bracket 9 is slidably sleeved on the guiding rod 72, the side of the first limiting block 71 is slidably connected to the side of the pressing block 13, and the side of the second limiting block 73 is attached to the side of the bracket 9 away from the pressing block 13; when it is necessary to drive the rotating shaft 10 and the pressing roller 11 by the bracket 9 to move horizontally to fix the other side of the flexible circuit board 2 after fixing one end of the flexible circuit board 2, move the bracket 9 to make the bracket 9 move on the circumferential surface of the guiding rod 72. The guiding rod 72 can better guide the bracket 9 to prevent the two ends of the bracket 9 from deviating during the movement of the bracket 9. The second limiting block 73 can better limit the moving distance of the bracket 9 to prevent the bracket 9 from moving excessively.

[0031] As Figure 2As shown, a bracket 9 is provided on the punching plate 1. A chute 8 is opened at the top of the punching plate 1. The bottom of the bracket 9 is slidably connected to the inner wall of the chute 8. A rotating shaft 10 is rotatably connected inside the bracket 9. A pressure roller 11 is fixedly sleeved on the rotating shaft 10. The flexible circuit board 2 is in contact with the bottom of the pressure roller 11. A locking mechanism 12 is provided at the top of the bracket 9. The locking mechanism 12 includes sliders 122 slidably connected to the side of the bracket 9. The number of the sliders 122 is two. A connecting block 127 is fixedly connected to the side of the slider 122 away from the bracket 9. A locking groove 121 is opened at the top of the punching plate 1, and the bottom of the connecting block 127 is inserted into the locking groove 121. A connecting plate 123 is fixedly connected between the two sliders 122. The connecting plate 123 is located at the top of the bracket 9. A threaded rod 124 is threadedly connected to the top of the connecting plate 123. The bottom of the threaded rod 124 is rotatably connected to the top of the bracket 9. A turning handle 125 is fixedly connected to the top of the threaded rod 124. The end of the rotating shaft 10 movably penetrates through the bracket 9 and is fixedly connected to a disc 126. An arc-shaped groove 128 is opened at the bottom of the slider 122. The top of the disc 126 is fitted with the inner wall of the arc-shaped groove 128. When it is necessary to lock the bracket 9 and the pressure roller 11 after the bracket 9 moves to the required position, by rotating the turning handle 125, the threaded rod 124 is driven to rotate. Since a bearing is installed inside the bracket 9 and the inner wall of the bearing is fixedly connected to the threaded rod 124, the threaded rod 124 rotates to move the connecting plate 123 up and down. While the connecting plate 123 is moving, the sliders 122 fixedly connected to both ends are driven to slide on one side of the bracket 9, so that the sliders 122 drive the connecting blocks 127 to move up and down, and the connecting blocks 127 are inserted into the inside of the locking groove 121, so as to better limit the bracket 9 and prevent the bracket 9 from shifting during the punching process, which affects the punching of the flexible circuit board 2. While the sliders 122 are moving, the arc-shaped grooves 128 at the bottom are driven to move, so that the inner wall of the arc-shaped groove 128 abuts against the disc 126, which can better fix the pressure roller 11 and the rotating shaft 10, so as to fix one side of the flexible circuit board 2 on the punching plate 1 and prevent the pressure roller 11 and the rotating shaft 10 from rolling during the punching process, causing the situation that one side of the flexible circuit board 2 is disengaged and shifted.

[0032] As Figure 5As shown, an arc-shaped convex portion 1261 is provided on the circumferential surface of the disc 126, and an arc-shaped concave portion 1281 adapted to the shape of the arc-shaped convex portion 1261 is provided in the arc-shaped groove 128, and the arc-shaped convex portion 1261 is in contact with the arc-shaped concave portion 1281; by providing the arc-shaped convex portion 1261 on the circumferential surface of the disc 126 and providing the arc-shaped concave portion 1281 adapted to the shape of the arc-shaped convex portion 1261 in the arc-shaped groove 128, when the arc-shaped groove 128 locks the disc 126, the arc-shaped convex portion 1261 and the arc-shaped concave portion 1281 are in contact with each other, which can better increase the contact area between the disc 126 and the arc-shaped groove 128, and is beneficial to improving the locking effect of the arc-shaped groove 128 on the disc 126.

[0033] As Figure 5 shown, first inclined portions 1262 are provided on both sides of the disc 126, the arc-shaped convex portion 1261 is located between the two first inclined portions 1262, and the first inclined portions 1262 are connected to the arc-shaped convex portion 1261. A second inclined portion 1282 adapted to the shape of the first inclined portion 1262 is provided in the arc-shaped groove 128, and the first inclined portion 1262 is in contact with the second inclined portion 1282; by providing the first inclined portions 1262 on both sides of the disc 126 and providing the second inclined portion 1282 adapted to the shape of the first inclined portion 1262 in the arc-shaped groove 128, when the arc-shaped groove 128 locks the disc 126, the first inclined portion 1262 and the second inclined portion 1282 are in contact with each other, which can better increase the contact area between the disc 126 and the arc-shaped groove 128, and is beneficial to improving the locking effect of the arc-shaped groove 128 on the disc 126.

[0034] As Figure 6 shown, a first inclined surface 1271 is provided at a position near the bottom of the side surface of the connecting block 127, and a second inclined surface 1211 adapted to the first inclined surface 1271 is provided on the inner wall of the locking groove 121, and the first inclined surface 1271 is in contact with the second inclined surface 1211; by providing the first inclined surface 1271 at a position near the bottom of the side surface of the connecting block 127 and providing the second inclined surface 1211 adapted to the first inclined surface 1271 on the inner wall of the locking groove 121, when the connecting block 127 is inserted into the locking groove 121 to lock the connecting block 127, the first inclined surface 1271 and the second inclined surface 1211 are in contact with each other, which can better prevent the connecting block 127 from shaking during locking, and make the fixing of the bracket 9 more stable and reliable.

[0035] As Figure 4As shown, a rubber sleeve 15 is fixedly sleeved on the circumferential surface of the pressure roller 11. When the pressure roller 11 rolls on the surface of the flexible circuit board 2, since the circumferential surface of the pressure roller 11 is in direct contact with the surface of the flexible circuit board 2, by fixedly sleeving the rubber sleeve 15 on the circumferential surface of the pressure roller 11, it can better prevent the circumferential surface of the pressure roller 11 from directly contacting the surface of the flexible circuit board 2, thereby causing damage to the surface of the flexible circuit board 2. The friction between the flexible circuit board 2 and the pressure roller 11 is increased through the rubber sleeve 15, making the fixation of the flexible circuit board 2 more stable.

[0036] As Figure 1 As shown, two guide blocks 6 are fixedly connected to the top of the punching plate 1, and both ends of the square rod 3 are slidably connected to the opposite surfaces of the two guide blocks 6. When the screw rod 4 rotates, by fixedly connecting two guide blocks 6 to the top of the punching plate 1 and slidably connecting both ends of the square rod 3 to the opposite surfaces of the two guide blocks 6, it can better limit the square rod 3 and prevent the screw rod 4 from driving the square rod 3 to rotate when rotating, which is beneficial to improving the stability of the square rod 3 during movement.

[0037] Working principle:

[0038] When it is necessary to punch holes in the flexible circuit board 2, the bracket 9, the rotating shaft 10 and the pressure roller 11 are moved to one side of the first limit block 71 under the guidance of the guide rod 72. Then, the flexible circuit board 2 is passed through the bottom of the pressure roller 11 and inserted into the side of the square rod 3. Then, the knob 5 is rotated to drive the screw rod 4 to rotate. Since a bearing is installed inside the punching plate 1 and the inner wall of the bearing is fixedly connected to the screw rod 4, when the screw rod 4 rotates, the square rod 3 and the pressure block 13 move downward, so as to fix the side of the flexible circuit board 2 that does not need to be punched. After fixing one side of the flexible circuit board 2, the bracket 9 is moved, so as to drive the rotating shaft 10 and the pressure roller 11 to move to the side of the second limit block 73 close to the flexible circuit board 2. And during the movement, the pressure roller 11 rolls on the top of the flexible circuit board 2, which can better flatten the flexible circuit board 2 and prevent the flexible circuit board 2 from bending. By rotating the turning handle 125, the threaded rod 124 is driven to rotate. Since a bearing is installed inside the bracket 9 and the inner wall of the bearing is fixedly connected to the threaded rod 124, when the threaded rod 124 rotates, the connecting plate 123 moves up and down. While the connecting plate 123 is moving, the sliders 122 fixedly connected at both ends slide on one side of the bracket 9, so that the sliders 122 drive the connecting block 127 to move up and down. The connecting block 127 is inserted into the locking groove 121, which can better lock the bracket 9 and prevent the bracket 9 from shifting. During the insertion, the arc-shaped groove 128 moves downward under the drive of the connecting block 127, so that the inner wall of the arc-shaped groove 128 is in contact with the circumferential surface of the disc 126, which can better fix the other side of the flexible circuit board 2 that does not need to be punched and prevent the flexible circuit board 2 from shaking and shifting during punching. And it can lock the pressure roller 11 and the rotating shaft 10 to prevent the pressure roller 11 and the rotating shaft 10 from rolling during punching, causing the side of the flexible circuit board 2 to break away and shift. When the punching is completed, only need to rotate the knob 5 and the turning handle 125 in the reverse direction to move the bracket 9 and the pressure block 13 upward, and then take out the flexible circuit board 2 from the punching plate 1.

[0039] The present utility model covers any alternatives, modifications, equivalent methods and solutions made on the essence and scope of the present utility model. In order to enable the public to have a thorough understanding of the present utility model, specific details are described in detail in the above preferred embodiments of the present utility model. For those skilled in the art, they can fully understand the present utility model without the description of these details.

[0040] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A punching tool for a flexible circuit board, characterized in that: include: A punching plate (1) is provided, and a flexible circuit board (2) is placed on the punching plate (1). A receiving groove (14) is provided on the punching plate (1). A square rod (3) is slidably connected in the receiving groove (14). A screw rod (4) is threadedly connected to the top of the square rod (3). The bottom of the screw rod (4) is rotatably connected to the bottom of the inner wall of the receiving groove (14). A knob (5) is fixedly connected to the top of the screw rod (4). A pressing block (13) is fixedly connected to the side of the square rod (3). One end of the flexible circuit board (2) is fitted with the side of the square rod (3). The pressing block (13) is pressed on the flexible circuit board (2). ), a guide mechanism (7) is arranged on the top of the punching plate (1), a bracket (9) is arranged on the punching plate (1), a slide groove (8) is opened on the top of the punching plate (1), the bottom of the bracket (9) is slidably connected to the inner wall of the slide groove (8), a rotating shaft (10) is rotatably connected inside the bracket (9), a pressure roller (11) is fixedly sleeved on the rotating shaft (10), the flexible circuit board (2) is in contact with the bottom of the pressure roller (11), and a locking mechanism (12) is arranged on the top of the bracket (9), and the locking mechanism (12) is used to lock the bracket (9) and the pressure roller (11).

2. The flexible circuit board punching jig according to claim 1, characterized in that: The guide mechanism (7) comprises a guide rod (72), a limit block 1 (71) and a limit block 2 (73) are respectively fixed on the top of the punching plate (1), the guide rod (72) is fixedly connected between the limit block 1 (71) and the limit block 2 (73), the bracket (9) is slidably sleeved on the guide rod (72), the side surface of the limit block 1 (71) is slidably connected to the side surface of the pressure block (13), and the side surface of the limit block 2 (73) is in contact with a side of the bracket (9) away from the pressure block (13).

3. The flexible circuit board punching jig according to claim 1, characterized in that: The locking mechanism (12) comprises a slider (122) slidably connected to the side of the bracket (9), the number of the sliders (122) is two, a connecting block (127) is fixedly connected to the side of the slider (122) away from the bracket (9), a locking groove (121) is formed on the top of the punching plate (1), and the bottom of the connecting block (127) is inserted into the locking groove (121), a connecting plate (123) is fixedly connected between the two sliders (122), and the connecting plate (123) is located on the bracket ( The top of the connecting plate (123) is threadedly connected to a threaded rod (124), the bottom of the threaded rod (124) is rotatably connected to the top of the bracket (9), the top of the threaded rod (124) is fixedly connected to a handle (125), the end of the rotating shaft (10) movably passes through the bracket (9) and is fixedly connected to a disc (126), the bottom of the slider (122) is provided with an arc groove (128), and the top of the disc (126) is in contact with the inner wall of the arc groove (128).

4. The flexible circuit board punching jig according to claim 3, characterized in that: An arc-shaped protrusion (1261) is arranged on the circumferential surface of the circular disk (126), and an arc-shaped recess (1281) matching the shape of the arc-shaped protrusion (1261) is arranged in the arc-shaped groove (128), and the arc-shaped protrusion (1261) fits the arc-shaped recess (1281).

5. The flexible circuit board punching jig according to claim 4, characterized in that: The first inclined portion (1262) is provided on both sides of the disc (126), the arc-shaped protrusion (1261) is located between the two first inclined portions (1262), and the first inclined portion (1262) is connected to the arc-shaped protrusion (1261), and a second inclined portion (1282) adapted to the shape of the first inclined portion (1262) is provided in the arc-shaped groove (128), and the first inclined portion (1262) is in contact with the second inclined portion (1282).

6. The flexible circuit board punching jig according to claim 3, characterized in that: A first inclined surface (1271) is provided on the side of the connection block (127) near the bottom, and a second inclined surface (1211) matching the first inclined surface (1271) is provided on the inner wall of the locking groove (121), and the first inclined surface (1271) is in close contact with the second inclined surface (1211).

7. The flexible circuit board punching jig according to claim 1, characterized in that: A rubber sleeve (15) is fixedly sleeved on the circumferential surface of the pressure roller (11).

8. The flexible circuit board punching jig according to claim 1, characterized in that: Two guide blocks (6) are fixedly connected to the top of the punching plate (1), and the two ends of the square rod (3) are respectively slidably connected to the opposite surfaces of the two guide blocks (6).

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