Flexible circuit board bending jig

Abstract

A flexible circuit board bending jig comprises an upper die and a lower die, the upper die comprises an upper die fixing plate and an upper die pressing block connected to the upper die fixing plate in a sliding mode, the bottom face of the upper die pressing block is provided with a lower pressing face, the edge position of the lower pressing face is sunken to form an avoiding groove, and the side wall and the bottom face of the avoiding groove form a bending side face and a bending bottom face. The lower die comprises a lower die fixing plate and an upper die pressing block, the lower pressing surface, the bending side surface and the bending bottom surface are continuously arranged, the included angle between every two adjacent surfaces is larger than a pre-forming angle, a buffer space exists between the upper die fixing plate and the upper die pressing block, an elastic piece is arranged in the buffer space, and the two ends of the elastic piece are connected with the upper die fixing plate and the upper die pressing block correspondingly; the top face of the lower die jig is provided with a bending forming face matched with the lower pressing face, the second lower pressing face and the third lower pressing face. Compared with the prior art, the bending jig provided by the utility model has a better bending effect and can improve the use reliability of the bent flexible circuit board.

Description

Technical Field

[0001] The utility model belongs to the technical field of bending jigs, specifically to a bending jig for flexible circuit boards. Background Art

[0002] The flexible printed circuit boards used in automotive batteries require bending. During this process, if the gap between the upper mold block and the lower mold groove of the flexible circuit board bending jig is too small, the flexible circuit board can be squeezed and damaged. Furthermore, after bending, the product can rebound after being left for a period of time, resulting in insufficient plasticity and failure to meet design requirements. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a flexible circuit board bending jig.

[0004] To achieve the above objectives, the utility model discloses a flexible circuit board bending jig, comprising an upper mold and a lower mold, the upper mold comprising an upper film fixing plate and an upper mold pressing block slidably connected to the upper mold fixing plate, the bottom surface of the upper mold pressing block is provided with a lower pressing surface, the edge positions of the lower pressing surface are recessed to form avoidance grooves, the side walls and bottom surfaces of the avoidance grooves form bending side surfaces and bending bottom surfaces, the lower pressing surfaces, bending side surfaces and bending bottom surfaces are continuously arranged and the angle between the two adjacent surfaces is greater than the preforming angle, a buffer space exists between the upper film fixing plate and the upper mold pressing block, an elastic member is provided in the buffer space, the two ends of the elastic member are respectively connected to the upper film fixing plate and the upper mold pressing block, the lower mold comprises a lower mold jig, and the top surface of the lower mold jig is provided with a bending forming surface adapted to the lower pressing surface, the second lower pressing surface and the third lower pressing surface.

[0005] Preferably, the angle between the bent side surface and the bent bottom surface is greater than the preforming angle by 20° to 30°.

[0006] Preferably, the distance between the bent side surface and the corresponding position on the bending forming surface is greater than the thickness of the flexible circuit board to be bent.

[0007] Preferably, a receiving cavity is provided on the top of the upper mold block, and the elastic member is partially provided in the receiving cavity.

[0008] Preferably, the depth of the accommodating cavity is greater than half the length of the elastic member.

[0009] Preferably, there are multiple elastic members, and the multiple elastic members are evenly installed on the upper mold block.

[0010] Preferably, the upper membrane fixing plate includes a fixing frame and a top cover, the fixing frame is provided with a penetrating mounting hole, the inner wall of the fixing frame is provided with a limit block, the upper molded block has a connecting ear extending outward, the upper molded block passes through the mounting hole so that the connecting ear and the limit block are limited and matched, and the top cover covers the mounting hole.

[0011] Preferably, there is an installation gap between the upper mold block and the installation hole.

[0012] Preferably, the fixing frame and the limiting block are detachably connected.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The lower pressing surface, bending side surface, and bending bottom surface are arranged continuously. During the bending process, these three surfaces cooperate with the bending forming surface to bend the flexible circuit board. The angle between two adjacent surfaces of the lower pressing surface, bending side surface, and bending bottom surface is greater than the pre-formed angle. This results in a larger angle than the pre-formed angle for the bent flexible circuit board, resulting in better plasticity and an enhanced plasticity effect. The bent flexible circuit board is relatively less likely to experience springback issues, which helps improve the reliability of the bent flexible circuit board.

[0015] A buffer space exists between the upper film fixing plate and the upper mold block, within which an elastic member is installed. The ends of the elastic member are connected to the upper film fixing plate and the upper mold block, respectively. During the bending process, when the lower pressing surface, the bending side surfaces, and the bending bottom surface press the flexible circuit board until it is flush with the bending forming surface, the upper film fixing plate can continue to move downward relative to the upper mold block. During this process, the elastic member is compressed, applying downward pressure to the upper mold block, which presses the flexible circuit board tightly, completing the bending of the flexible circuit board. The elastic force provided by the elastic member to the upper mold block can make the force on the flexible circuit board more uniform, improving the forming effect of the flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the three-dimensional structure of the flexible circuit board bending jig in the embodiment;

[0017] Figure 2 for Figure 1 Schematic diagram of the three-dimensional decomposition structure of the flexible circuit board bending fixture;

[0018] Figure 3 for Figure 1 Cross-sectional view of the flexible circuit board bending jig;

[0019] Upper membrane fixing plate 1; fixing frame 11; mounting hole 111; limit block 112; top cover 12; buffer space 13;

[0020] Upper mold block 2; lower pressing surface 21; avoidance groove 22; bent side surface 221; bent bottom surface 222; accommodating cavity 23;

[0021] Elastic member 3;

[0022] Lower mold fixture 4; bending forming surface 41; groove 42; bearing surface 43. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] A flexible circuit board bending jig, see Figure 1-Figure 3 , including an upper mold and a lower mold, the upper mold includes an upper mold fixing plate 1 and an upper mold pressing block 2 slidably connected to the upper mold fixing plate, the bottom surface of the upper mold pressing block 2 is provided with a lower pressing surface 21, the edge position of the lower pressing surface 21 is recessed to form an avoidance groove 22, the side wall and bottom surface of the avoidance groove 22 form a bent side surface 221 and a bent bottom surface 222, the lower pressing surface 21, the bent side surface 221 and the bent bottom surface 222 are continuously arranged and the angle between the two adjacent surfaces is greater than the preforming angle. In this embodiment, the upper mold pressing block 2 is as shown in FIG. Figure 3 The left and right sides are provided with avoidance grooves 22 and corresponding bending side surfaces 221 and bending bottom surfaces 222. The lower pressure surface 21, the bending side surfaces 221 and the bending bottom surface 222 form a surface for bending the flexible circuit board. There is a buffer space 13 between the upper film fixing plate 1 and the upper mold block 2. An elastic member 3 is provided in the buffer space 13, which is preferably a spring. The two ends of the elastic member 3 are respectively connected to the upper film fixing plate 1 and the upper mold block 2. The lower mold includes a lower mold fixture 4. The top surface of the lower mold fixture 4 is provided with a bending forming surface 41 adapted to the lower pressure surface 21, the second lower pressure surface 21 and the third lower pressure surface 21. As shown in the figure, the bending forming surface 41 is a groove 42 and a bearing surface 43 extending outward from the opening of the groove 42.

[0025] The lower pressing surface 21, the bending side surface 221, and the bending bottom surface 222 of the upper mold block 2 are arranged continuously. During the bending process, these three surfaces cooperate with the bending forming surface 41 to bend the flexible circuit board. The angle between two adjacent surfaces of the lower pressing surface 21, the bending side surface 221, and the bending bottom surface 222 is greater than the pre-forming angle. As a result, the bent flexible circuit board has a larger angle than the pre-formed angle, and has better plasticity, which improves the plasticity effect. The bent flexible circuit board is relatively less likely to experience springback problems, which helps to improve the reliability of the bent flexible circuit board.

[0026] A buffer space 13 is provided between the upper film fixing plate 1 and the upper mold block 2. An elastic member 3 is provided within the buffer space 13. The ends of the elastic member 3 are connected to the upper film fixing plate 1 and the upper mold block 2, respectively. During the bending process, when the lower pressing surface 21, the bending side surface 221, and the bending bottom surface 222 press the flexible circuit board to be flush with the bending forming surface 41, the upper film fixing plate 1 can continue to move downward relative to the upper mold block 2. During this process, the elastic member 3 is compressed, providing downward pressure to the upper mold block 2, which can press the flexible circuit board tightly to complete the bending of the flexible circuit board. The elastic force provided by the elastic member 3 to the upper mold block 2 can make the force on the flexible circuit board more uniform, thereby improving the forming effect of the flexible circuit board.

[0027] In actual use, the position on the flexible circuit board corresponding to the bent bottom surface 222 is prone to rebound due to actual use. Therefore, in this embodiment, the material of the flexible circuit board is solid copper. In order to ensure the plasticity after bending, reduce rebound, and improve reliability of use, the angle between the bent side surface 221 and the bent bottom surface 222 is greater than the pre-forming angle by 20° to 30°, preferably greater than 25°, and the corresponding position on the bending forming surface 41 also has the same angle.

[0028] In this embodiment, the distance between the bending side surface 221 and the corresponding position on the bending forming surface 41 is greater than the thickness of the flexible circuit board to be bent. This can reduce the risk of damage to the flexible circuit board during the bending process and improve the forming quality. Furthermore, the above distance is 1.2 to 1.6 times the thickness of the flexible circuit board to be bent. This can avoid the problem of poor plasticity and poor bending effect of the flexible circuit board after bending due to excessive gap.

[0029] In this embodiment, a receiving cavity 23 is provided on the top of the upper mold block 2, and the elastic member 3 is partially provided in the receiving cavity 23. During installation, the elastic member 3 can be placed in the receiving cavity 23, which is convenient for assembly.

[0030] The depth of the accommodating cavity 23 is greater than half the length of the elastic member 3 , which can improve the assembly stability and reliability of the elastic member 3 .

[0031] Among them, there are multiple elastic members 3, and in this embodiment, two are preferably provided. The two elastic members 3 are evenly installed on the upper mold block 2, which enables the elastic members 3 to provide uniform force to the upper mold block 2 for bending, thereby improving the forming effect.

[0032] In this embodiment, the upper membrane fixing plate 1 includes a fixing frame 11 and a top cover 12 that is detachably covered on the fixing frame 11. A penetrating mounting hole 111 is provided in the fixing frame 11. The inner wall of the fixing frame 11 is provided with a limit block 112, specifically two of them and located in relative positions. There is a sliding space between the limit block and the revised version. The upper mold block 2 has two connecting ears extending outward. The upper mold block 2 passes through the mounting hole so that the connecting ears are located in the sliding space and cooperate with the limit block. The above structure is simple and easy to assemble.

[0033] There is an installation gap between the upper mold block 2 and the installation hole, so that the movement resistance of the upper mold block 2 is small, which facilitates molding.

[0034] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A flexible circuit board bending jig, characterized by: The cam is secured to the upper and lower molds and has a cam face, which is adapted to engage said cam face, said cam being secured to the upper and lower molds and having a cam face that is adapted to engage said cam face.

2. The flexible circuit board bending jig according to claim 1, characterized in that: The angle between the bent side surface and the bent bottom surface is greater than the preforming angle by 20° to 30°.

3. The flexible circuit board bending jig according to claim 1, characterized in that: The distance between the bending side surface and the corresponding position on the bending forming surface is greater than the thickness of the flexible circuit board to be bent.

4. The flexible circuit board bending jig according to claim 1, characterized in that: A receiving cavity is provided on the top of the upper mold block, and the elastic member is partially arranged in the receiving cavity.

5. The flexible circuit board bending jig according to claim 4, characterized in that: The depth of the accommodating cavity is greater than half the length of the elastic member.

6. The flexible circuit board bending jig according to claim 4, characterized in that: There are multiple elastic members, and the multiple elastic members are evenly installed on the upper mold block.

7. The flexible circuit board bending jig according to claim 1, characterized in that: The upper membrane fixing plate includes a fixing frame and a top cover. A penetrating mounting hole is provided in the fixing frame. A limit block is provided on the inner wall of the fixing frame. A connecting ear extends outward from the upper molded block. The upper molded block passes through the mounting hole so that the connecting ear and the limit block are limitedly engaged. The top cover covers the mounting hole.

8. The flexible circuit board bending jig according to claim 7, characterized in that: There is an installation gap between the upper mold block and the installation hole.

9. The flexible circuit board bending jig according to claim 7, characterized in that: The fixing frame is detachably connected to the limiting block.

Images