FPC bending jig

Abstract

The utility model provides a kind of FPC bending jig, belong to FPC circuit board processing technical field.The jig includes stage, lower mould, air hole plugging plate, mounting plate and upper mould;First negative pressure cavity is equipped in stage, and the top wall of first negative pressure cavity is provided with multiple groups of first negative pressure adsorption hole and first air hole;Lower mould is detachably arranged on stage by negative pressure adsorption, second negative pressure cavity is equipped in lower mould, and the top wall of lower mould is provided with multiple groups of second negative pressure adsorption hole, and the bottom wall of lower mould is provided with second air hole;Air hole plugging plate is movably arranged in second negative pressure cavity, and air hole plugging plate is configured to be adjustable relative to the position of second negative pressure adsorption hole;Mounting plate is configured to be lifted above lower mould;Upper mould is detachably mounted on mounting plate.The utility model specifically provides a kind of FPC bending jig, which is convenient to replace and install upper mould and lower mould, and effectively solve the frequent start-stop of negative pressure pump when FPC is fed.

Description

Technical Field

[0001] This utility model belongs to the field of FPC circuit board processing technology, specifically referring to an FPC bending fixture. Background Technology

[0002] In the production and processing of flexible printed circuit boards (FPCs), they need to be bent at specific angles according to product assembly requirements. This process usually relies on FPC bending fixtures. Existing FPC bending fixtures generally consist of an upper die and a lower die. During operation, the upper and lower dies work together to apply pressure to the FPC placed in the positioning area of ​​the lower die, thereby achieving a bend at a preset angle.

[0003] Because different FPC models vary in specifications such as thickness, width, bending position, and angle, the corresponding upper and lower dies need to be replaced for each FPC specification. Currently, most FPC bending fixtures on the market use bolts or clips to fasten the upper and lower dies to the fixture body, making replacement cumbersome and requiring tools. Repeated disassembly and installation can also lead to wear on the connection structure.

[0004] Meanwhile, to ensure the FPC does not shift during bending, it needs to be stably positioned on the lower mold. Currently, the mainstream positioning method in the industry is negative pressure adsorption positioning. After the FPC is placed on the lower mold, the negative pressure pump is activated, and the adsorption holes generate negative pressure to firmly adsorb and fix the FPC; after the bending process is completed, the negative pressure pump is turned off to remove the FPC. However, in actual mass production scenarios, the negative pressure pump needs to be turned on and off once for each FPC processed. Frequent starting and stopping of the negative pressure pump accelerates component wear and shortens its lifespan; it also easily causes fluctuations in negative pressure, which may lead to unstable FPC positioning and increase the product defect rate. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide an FPC bending fixture to at least partially solve the problems mentioned in the background art.

[0006] The technical solution adopted by this utility model is as follows: This utility model proposes an FPC bending fixture, comprising: The stage has a first negative pressure chamber inside, and the top wall of the first negative pressure chamber has multiple sets of first negative pressure adsorption holes and first air holes. The lower mold is detachably mounted on the platform by negative pressure adsorption. The lower mold has a second negative pressure chamber. The top wall of the lower mold has multiple sets of second negative pressure adsorption holes. The bottom wall of the lower mold has a second air hole. When the lower mold is mounted on the platform, the second negative pressure chamber and the first negative pressure chamber are connected through the second air hole and the first air hole. A pore sealing plate is movably disposed in the second negative pressure chamber, and the pore sealing plate is configured to be adjustable in position relative to the second negative pressure adsorption hole. The mounting plate is configured to rise and fall above the lower mold. The upper mold is detachable and can be installed on the mounting plate.

[0007] Furthermore, multiple sets of limiting plates are provided on the bottom wall of the second negative pressure chamber, and a support plate is horizontally movable inside the second negative pressure chamber. Multiple sets of lifting rods are slidably provided on the support plate. The air hole sealing plate is connected to the upper end of the lifting rod, and a sliding plate is provided at the lower end of the lifting rod. The lower surface of the sliding plate and the upper surface of the limiting plate are fitted inclined surfaces. The sliding plate is driven by the support plate to slide above the limiting plate.

[0008] Furthermore, a positioning cylinder is provided below the lower mold, the positioning cylinder corresponds to the second air hole, and the positioning cylinder is configured to be inserted into the first air hole.

[0009] Furthermore, a sealing groove is provided above the first air hole, and a sealing ring is provided below the lower mold. The sealing ring is located on the outer periphery of the positioning cylinder, and the sealing ring is adapted to the sealing groove.

[0010] Furthermore, the mounting plate is provided with a driving cavity, the bottom wall of the driving cavity is provided with a mounting groove, the upper end of the upper mold is provided with a connecting plate, the connecting plate is detachably installed in the mounting groove, the connecting plate is provided with a fixing hole, the mounting plate is horizontally movable within the mounting plate, the driving plate is provided with a fixing post, and the fixing post is adapted to the fixing hole.

[0011] Furthermore, the platform is provided with a bracket, the bracket is provided with a bending cylinder, and the mounting plate is connected to the free end of the bending cylinder.

[0012] The technical solution provided by this utility model has the following beneficial effects: The negative pressure adsorption simultaneously achieves rapid fixation of the lower mold and adsorption positioning of the FPC flexible board on the lower mold; and the detachable installation of the lower and upper molds adapts to the rapid switching needs of mass production of multi-specification FPCs.

[0013] By adjusting the sealing state of the second negative pressure adsorption hole using the pore sealing plate, the problem of frequent start-stop of the negative pressure pump is effectively solved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an FPC bending fixture proposed in an embodiment of the present invention; Figure 2 This is a side view of a three-dimensional cross-sectional structure of an FPC bending fixture according to an embodiment of the present invention. Figure 3This is a three-dimensional cross-sectional view of an FPC bending fixture proposed in an embodiment of the present invention. Figure 4 for Figure 3 A magnified view of part A; Figure 5 This is a schematic diagram of the platform and lower mold of an FPC bending fixture according to an embodiment of the present invention; Figure 6 A three-dimensional structural diagram of the lower mold of an FPC bending fixture proposed in an embodiment of this utility model, viewed from below. Figure 7 This is a three-dimensional cross-sectional view of the lower mold of an FPC bending fixture according to an embodiment of the present invention. Figure 8 for Figure 7 A magnified view of part B.

[0015] The components are as follows: 1. Platform; 2. First negative pressure chamber; 3. First negative pressure adsorption hole; 4. First air hole; 5. Lower mold; 6. Second negative pressure chamber; 7. Second negative pressure adsorption hole; 8. Second air hole; 9. Air hole sealing plate; 10. Mounting plate; 11. Upper mold; 12. Limiting plate; 13. Support plate; 14. Lifting rod; 15. Sliding plate; 16. Positioning cylinder; 17. Sealing groove; 18. Sealing ring; 19. Drive chamber; 20. Mounting groove; 21. Connecting plate; 22. Fixing hole; 23. Drive plate; 24. Fixing column; 25. Bracket; 26. Bending cylinder.

[0016] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0018] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0019] See Figures 1-3 , Figures 5-8 In this embodiment, the present invention provides an FPC bending fixture, including a platform 1, a lower mold 5, an air vent sealing plate 9, a mounting plate 10, and an upper mold 11. The platform 1 has a first negative pressure chamber 2, and the top wall of the first negative pressure chamber 2 has multiple sets of first negative pressure adsorption holes 3 and first air vents 4. The lower mold 5 is detachably mounted on the platform 1 via negative pressure adsorption. The lower mold 5 has a second negative pressure chamber 6, and the top wall of the lower mold 5 has multiple sets of second negative pressure adsorption holes 7. The bottom wall of the lower mold 5 has second air vents 8. When the lower mold 5 is mounted on the platform 1, the second negative pressure chamber 6 and the first negative pressure chamber 2 are connected through the second air vents 8 and the first air vents 4. The FPC is subjected to the second negative pressure... The suction hole 7 is installed on the lower mold 5 under negative pressure adsorption positioning. The vent sealing plate 9 is movably disposed in the second negative pressure chamber 6. The vent sealing plate 9 is configured to be adjustable relative to the second negative pressure adsorption hole 7 to adjust the sealing state of the second negative pressure adsorption hole 7. When the FPC needs to be removed and replaced, the vent sealing plate 9 is driven to seal the second negative pressure adsorption hole 7. After the FPC is replaced, the vent sealing plate 9 is driven to move away from the second negative pressure hole. The FPC is positioned by negative pressure adsorption. The mounting plate 10 is configured to rise and fall above the lower mold 5. The upper mold 11 is detachably installed on the mounting plate 10. The upper mold 11 and the lower mold 5 work together to bend the FPC that is adsorbed and fixed on the lower mold 5.

[0020] It should be noted that the platform 1 is connected to an external negative pressure pump via a negative pressure pipe. The negative pressure pump draws negative pressure from the first negative pressure chamber 2 inside the platform 1, and the lower mold 5 is fixed with negative pressure through multiple sets of first air holes 4. The lower mold 5 has positioning grooves adapted to the FPC. By placing the FPC flexible board into the positioning grooves, the positioning and installation of the FPC on the lower mold 5 can be completed. The negative pressure pump and the positioning grooves are existing technologies, so they will not be described in detail in this embodiment.

[0021] In practical use, select appropriate upper mold 11 and lower mold 5 for the FPC to be bent as needed. Place the lower mold 5 on the platform 1, ensuring that the second air hole 8 corresponds to the first air hole 4, and guaranteeing that the second negative pressure chamber 6 is connected to the first negative pressure chamber 2. Simultaneously, the lower mold 5 is fixed by negative pressure adsorption through multiple sets of first air holes 4, completing the fixed installation of the lower mold 5. Through the correspondence between the second air hole 8 and the first air hole 4, the second negative pressure chamber 6 is connected to the first negative pressure chamber 2. Then, install the upper mold 11 on the mounting plate 10. Place the FPC to be bent into the positioning groove of the lower mold 5, and control the air hole sealing plate 9 to move away from the second air hole 8. The FPC can then be adsorbed by negative pressure through the second air hole 8, allowing the FPC to be stably positioned and installed on the lower mold 5. Finally, by controlling the mounting plate 10 and the upper mold 11 to press down, the bending process of the FPC is completed under the stamping of the upper mold 11 and the lower mold 5. After the bending process is completed, the air hole sealing plate 9 is controlled to return to the second air hole 8 to continue to seal the second air hole 8, so as to remove the bent FPC and replace it with a new FPC flexible board.

[0022] Specifically, see Figure 7 and Figure 8 In this embodiment, multiple sets of limiting plates 12 are provided on the bottom wall of the second negative pressure chamber 6, and a support plate 13 is horizontally movable inside the second negative pressure chamber 6. Multiple sets of lifting rods 14 are slidably provided on the support plate 13. The air hole sealing plate 9 is connected to the upper end of the lifting rod 14, and a sliding plate 15 is provided at the lower end of the lifting rod 14. The lower surface of the sliding plate 15 and the upper surface of the limiting plate 12 are fitted inclined surfaces. The sliding plate 15 is driven by the support plate 13 to slide above the limiting plate 12.

[0023] It should be noted that in this embodiment, a screw-slide-rod drive mechanism is provided inside the second negative pressure chamber 6. This screw-slide-rod drive mechanism is existing technology and includes a screw and a slide. The support plate 13 is connected to the screw via threads and is slidably mounted on the slide. A handwheel is provided on one end of the screw located outside the second negative pressure chamber 6. When the screw is driven to rotate by the handwheel, the support plate 13 can be moved under the drive of the screw and the guide sliding of the slide. When the support plate 13 moves, the lifting rod 14 drives the vent sealing plate 9 and the sliding plate 15 to move synchronously. When the vent sealing plate 9 is removed from the second vent 8, the FPC can be positioned by negative pressure adsorption through the second vent 8. Furthermore, through the engagement of the lower surface of the sliding plate 15 and the upper surface of the support plate 13, when the vent sealing plate 9 is moved away from the second vent 8, the lifting rod 14 falls under the action of gravity, thus preventing the vent sealing plate 9 from always being in contact with the top wall of the second negative pressure chamber 6 when it moves with the support plate 13, which would cause wear during the reciprocating movement of the vent sealing plate 9.

[0024] Specifically, see Figures 5-7In this embodiment, a positioning cylinder 16 is provided below the lower mold 5. The positioning cylinder 16 corresponds to the second air hole 8. The positioning cylinder 16 is configured to be inserted into the first air hole 4. By setting the positioning cylinder 16, the lower mold 5 is positioned and installed on the platform 1.

[0025] Specifically, see Figure 5 and Figure 6 In this embodiment, a sealing groove 17 is provided above the first air hole 4, and a sealing ring 18 is provided below the lower mold 5. The sealing ring 18 is located on the outer periphery of the positioning cylinder 16. The sealing ring 18 is adapted to the sealing groove 17. When the lower mold 5 is installed on the platform 1, the sealing ring 18 is embedded in the sealing groove 17 to seal the negative pressure communication channel between the lower mold 5 and the platform 1.

[0026] Specifically, see Figure 3 and Figure 4 In this embodiment, the mounting plate 10 is provided with a driving cavity 19, and the bottom wall of the driving cavity 19 is provided with a mounting groove 20. The upper end of the upper mold 11 is provided with a connecting plate 21, which is detachably installed in the mounting groove 20. The connecting plate 21 is provided with a fixing hole 22. The mounting plate 10 is provided with a driving plate 23 that moves horizontally. The driving plate 23 is provided with a fixing post 24, which is adapted to the fixing hole 22. When the driving plate 23 moves and drives the fixing post 24 to be embedded in the fixing hole 22, the upper mold 11 and the mounting plate 10 can be installed.

[0027] It should be noted that in this embodiment, a screw and slide rod drive mechanism is also provided in the drive cavity 19. In a specific embodiment, the screw of this screw and slide rod drive mechanism can be a bidirectional screw. Two sets of drive plates 23 are symmetrically provided on the screw and slide rod drive mechanism, and two sets of connecting plates 21 are provided on the upper mold 11. The two sets of connecting plates 21 correspond to the two sets of drive plates 23 respectively. Through the reverse movement of the two sets of drive plates 23, the fixing posts 24 on them are driven to be embedded into the fixing holes 22 of the corresponding connecting plates 21.

[0028] Specifically, see Figures 1-3 In this embodiment, a support 25 is provided on the platform 1, and a bending cylinder 26 is provided on the support 25. The mounting plate 10 is connected to the free end of the bending cylinder 26. The upper mold 11 is driven to move by the bending cylinder 26, and the upper mold 11 and the lower mold 5 are used to press and bend the FPC.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. An FPC bending fixture, characterized in that, include: The stage (1) has a first negative pressure chamber (2) inside, and multiple sets of first negative pressure adsorption holes (3) and first air holes (4) are opened on the top wall of the first negative pressure chamber (2). The lower mold (5) is detachably mounted on the platform (1) by negative pressure adsorption. The lower mold (5) is provided with a second negative pressure cavity (6). Multiple sets of second negative pressure adsorption holes (7) are opened on the top wall of the lower mold (5). The bottom wall of the lower mold (5) is provided with a second air hole (8). When the lower mold (5) is mounted on the platform (1), the second negative pressure cavity (6) and the first negative pressure cavity (2) are connected through the second air hole (8) and the first air hole (4). The pore sealing plate (9) is movably disposed in the second negative pressure chamber (6), and the pore sealing plate (9) is configured to be adjustable relative to the second negative pressure adsorption hole (7); Mounting plate (10) is configured to rise and fall above the lower mold (5); The upper mold (11) can be detachably installed on the mounting plate (10).

2. The FPC bending fixture according to claim 1, characterized in that: Multiple sets of limiting plates (12) are provided on the bottom wall of the second negative pressure chamber (6). A support plate (13) is horizontally moved inside the second negative pressure chamber (6). Multiple sets of lifting rods (14) are slidably provided on the support plate (13). The air hole sealing plate (9) is connected to the upper end of the lifting rod (14). A sliding plate (15) is provided at the lower end of the lifting rod (14). The lower surface of the sliding plate (15) and the upper surface of the limiting plate (12) are fitted inclined surfaces. The sliding plate (15) is driven by the support plate (13) and slidably positioned above the limiting plate (12).

3. The FPC bending fixture according to claim 1, characterized in that: A positioning cylinder (16) is provided below the lower mold (5). The positioning cylinder (16) corresponds to the second air hole (8). The positioning cylinder (16) is configured to be inserted into the first air hole (4).

4. The FPC bending fixture according to claim 3, characterized in that: A sealing groove (17) is provided above the first air hole (4), and a sealing ring (18) is provided below the lower mold (5). The sealing ring (18) is located on the outer periphery of the positioning cylinder (16), and the sealing ring (18) is adapted to the sealing groove (17).

5. The FPC bending fixture according to claim 1, characterized in that: The mounting plate (10) is provided with a driving cavity (19), and the bottom wall of the driving cavity (19) is provided with a mounting groove (20). The upper end of the upper mold (11) is provided with a connecting plate (21), and the connecting plate (21) is detachably installed in the mounting groove (20). The connecting plate (21) is provided with a fixing hole (22). The mounting plate (10) is provided with a driving plate (23) that moves horizontally, and the driving plate (23) is provided with a fixing post (24). The fixing post (24) is adapted to the fixing hole (22).

6. The FPC bending fixture according to claim 1, characterized in that: The platform (1) is provided with a bracket (25), and the bracket (25) is provided with a bending cylinder (26). The mounting plate (10) is connected to the free end of the bending cylinder (26).

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