CN218998414U - Pre-bending jig for high-precision FPC circuit board - Google Patents

Abstract

The utility model relates to a FPC circuit board processing field, especially relate to a high accuracy is pre-bending jig for FPC circuit board, it includes the frame, be equipped with lower module and the last module that cooperates in the frame and use, the center department of lower module is equipped with the plummer, FPC circuit board is located the plummer, the both ends of last module length direction are equipped with the briquetting, the briquetting is located the top of the department that is to be bent of FPC circuit board, go up the module and go up the setting, go up the module and can descend to the briquetting and press the bending of FPC circuit board, go up the module and can also rise to the briquetting and break away from the FPC circuit board; the bottom surface of the upper module is provided with a retaining plate in a sliding manner, the retaining plate is positioned above the bearing table, in the descending process of the upper module, the retaining plate is abutted with the FPC circuit board earlier than the pressing block, the upper module is provided with a containing groove, and the retaining plate can slide to be completely positioned in the containing groove. The FPC bending precision is improved.

Description

Pre-bending jig for high-precision FPC circuit board

Technical Field

The application relates to the field of FPC circuit board processing, in particular to a pre-bending jig for a high-precision FPC circuit board.

Background

FPC, full name Flexible Printed Circuit, chinese name: flexible circuit boards, also known as flexible circuit boards, are lightweight, thin, flexible circuit boards, and the like. In order to be suitable for the design of the internal wiring of the electronic product, the FPC circuit board is often required to be subjected to pre-bending treatment in the practical application process. For some thin FPC circuit boards, the thin FPC circuit board is mainly realized by a manual bending mode.

With respect to the related art, the inventor considers that the bending degree and the bending effect of the FPC circuit board in the same batch are inconsistent due to manual bending, and the bending precision of the FPC circuit board needs to be improved.

Disclosure of Invention

In order to improve the bending precision of the FPC circuit board, the application provides a pre-bending jig for the high-precision FPC circuit board.

The application provides a high accuracy is pre-bending jig for FPC circuit board adopts following technical scheme:

the utility model provides a high accuracy is pre-bending jig for FPC circuit board, includes the frame, be equipped with lower module and the last module that the cooperation was used in the frame, the center department of lower module is equipped with the plummer, the FPC circuit board is located on the plummer, the both ends of last module length direction are equipped with the briquetting, the briquetting is located the top of the position of waiting to bend of FPC circuit board, go up the setting of module lift, go up the module and can descend to the briquetting and press the bending of FPC circuit board, go up the module and can also rise to the briquetting and break away from the FPC circuit board;

the bottom surface of the upper module is provided with a retaining plate in a sliding manner, the retaining plate is located above the bearing table, in the descending process of the upper module, the retaining plate is abutted to the FPC circuit board earlier than the pressing block, the upper module is provided with a containing groove, and the retaining plate can slide to be located in the containing groove completely.

By adopting the technical scheme, when the FPC circuit board is subjected to pre-bending treatment, the FPC circuit board is firstly placed on the bearing table of the lower module, the pressing block of the upper module is aligned to the bending position of the FPC circuit board, then the upper module is driven to descend until the pressing block bends the bending position of the FPC circuit board, in the descending process of the upper module, as no bearing object exists below the bending position of the FPC circuit board, the bearing plate is abutted with the FPC circuit board before the pressing block, and the part of the FPC circuit board on the bearing table is abutted against before the pressing block, so that the bending position of the FPC circuit board is contacted with the pressing block and is subjected to pressure, the displacement of the circuit board is not easy to occur, the stability of the FPC circuit board in the bending process is improved, and the bending precision of the FPC circuit board is improved; when the pressing block is contacted with the bending part of the FPC circuit board and gradually pressed downwards, the abutting plate is always abutted with the part of the FPC circuit board, which is positioned on the bearing table, and gradually slides upwards to be completely positioned in the accommodating groove, so that the influence on bending and forming of the FPC circuit board is reduced.

Optionally, be equipped with the slip subassembly on the butt plate, the slip subassembly includes guide block and first expansion spring, offer on the diapire of holding tank and supply the gliding guide way of guide block, the week lateral wall of guide block is laminated with the inner wall of guide way, the one end of guide block is connected with the one side that the butt plate kept away from lower module, the other end and the first expansion spring of guide block are connected, the one end that the guide block was kept away from to first expansion spring is connected with the diapire of guide way.

Through adopting above-mentioned technical scheme, select the suitable first expansion spring of rigidity according to actual conditions, when last module descends to the butt plate and FPC circuit board contacts, first expansion spring is compressed promptly, first expansion spring is for retrieving to former state, produce a effort towards FPC circuit board support tightly to the butt plate, in-process that last module constantly descends, first expansion spring is constantly compressed, make the butt plate support tightly with the FPC circuit board all the time, when last module rises, first expansion spring is relaxed, make the butt plate return to former state, the guide block has played the guide effect to the expansion of first expansion spring, reduce the flexible in-process of first expansion spring and rocked possibility, the stability of butt plate removal has been improved, be difficult for causing FPC circuit board skew when making butt plate and FPC circuit board support, further improve the bending precision of FPC circuit board.

Optionally, each vertical curb plate that is provided with in lower module length direction's both ends, each be equipped with a set of locating component in the one side that the curb plate is close to each other, every group locating component includes an L template, the L template includes vertical section and horizontal segment, the horizontal segment is rotated through torsional spring and vertical section and is connected and the axis of rotation is located the one side of keeping away from FPC circuit board, the groove of stepping down has been seted up on the one side that the curb plate is close to each other, the horizontal segment is rotatable to be located the groove of stepping down completely, two sets of two vertical sections are close to each other the one side and the lateral wall butt at FPC circuit board length direction both ends in the locating component, the top surface of horizontal segment flushes with the top surface of plummer.

By adopting the technical scheme, the positions of the side plates are arranged according to the length of the FPC circuit board and the positions of the bending positions of the FPC circuit board, when no external force acts on the FPC circuit board, the horizontal section is kept in a horizontal state under the action of the torsion springs, and when the FPC circuit board is placed on the bearing table, the two ends of the FPC circuit board in the length direction are limited by the L-shaped plates, so that the alignment and the positioning of the FPC circuit board in the length direction are automatically realized, the stability of the FPC circuit board in the bending process is further improved, and the bending precision of the FPC circuit board is further improved; when the pressing block is pressed down, the horizontal section rotates towards a direction away from the FPC circuit board under the action of external force until the horizontal section rotates to be completely positioned in the abdication groove, so that the influence on the descending of the FPC circuit board and the upper module is reduced; when the upper module rises and the FPC circuit board is taken out, the horizontal section automatically returns to the original position under the action of the torsion spring under the action of no external force.

Optionally, the vertical section is also located the groove of stepping down, two be connected with the second extension spring on the one side that vertical section kept away from each other, the one end that vertical section was kept away from to the second extension spring is connected with the diapire in the groove of stepping down, the degree of depth in the groove of stepping down is greater than the thickness of vertical section.

Through adopting above-mentioned technical scheme, the setting of second telescopic spring makes vertical section keep spacing effect to FPC circuit board length direction's both ends when can moving, at the in-process that FPC circuit board was bent, and second telescopic spring is compressed, drives L template and moves towards the direction of keeping away from FPC circuit board, has reduced the likelihood that FPC circuit board is buckled the in-process and is blocked, has also reduced the friction between L template and the FPC circuit board, has reduced the wearing and tearing to the FPC circuit board.

Optionally, be equipped with the limiting plate on the lower module, the limiting plate is located the both sides of FPC circuit board width direction, the lateral wall butt of one side and FPC circuit board width direction both sides that the limiting plate is close to each other.

Through adopting above-mentioned technical scheme, the limiting plate carries out spacingly to the FPC circuit board from the width direction of FPC circuit board, has further improved the stability of FPC circuit board in-process of bending, has further improved the bending precision of FPC circuit board.

Optionally, the limiting plate slides towards the direction that is close to each other or keeps away from, every be equipped with the slider on the bottom surface of limiting plate, offer the gliding spout of confession slider on the top surface of lower module, be equipped with the screw rod in the spout, be equipped with opposite direction two sections screw threads and two on the screw rod the slider cooperatees with two sections screw threads respectively, screw rod and slider threaded connection, the screw rod rotates with the inner wall of spout and is connected.

Through adopting above-mentioned technical scheme, because slider and screw rod threaded connection, and the screw thread on the screw rod is opposite, therefore the staff rotates the screw rod and can drive the slider and slide towards the direction that is close to or keeps away from to drive limiting plate and slide towards the direction that is close to or keeps away from each other, when needing to put into FPC circuit board, rotate screw rod drive limiting plate earlier and slide towards the direction that is away from each other, put into FPC circuit board after, reverse rotation screw rod again, drive limiting plate slides towards the direction that is close to each other, until the one side that the limiting plate is close to each other with the lateral wall butt of FPC circuit board, the possibility of producing friction between FPC circuit board and the limiting plate has been reduced, further reduced the wearing and tearing to the FPC circuit board.

Optionally, one end of the screw rod penetrates out of the lower module and is connected with a butterfly handle.

Through adopting above-mentioned technical scheme, the staff rotates butterfly handle and can rotate the screw rod, simple operation.

Optionally, a positioning block is arranged on one side of the upper module in the width direction, a vertical plate is vertically arranged on one side of the lower module in the width direction, a positioning groove for the positioning block to penetrate is formed in the vertical plate, and the positioning block is matched with the positioning groove for use.

Through adopting above-mentioned technical scheme, when the module goes up and down, the locating piece slides in the constant head tank, plays spacing and direction's effect to the removal of module, has improved the accuracy of module and FPC circuit board contact position, has further improved the bending precision of FPC circuit board.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the withstanding plate is abutted with the FPC circuit board before the pressing block, and the part of the FPC circuit board positioned on the bearing table is abutted against the FPC circuit board, so that the to-be-bent part of the FPC circuit board is contacted with the pressing block and is subjected to pressure, the FPC circuit board is not easy to displace, the stability of the FPC circuit board in the bending process is improved, and the bending precision of the FPC circuit board is improved;

two ends of the FPC circuit board in the length direction are limited by the L-shaped plates, so that alignment and positioning of the FPC circuit board in the length direction are automatically realized, stability of the FPC circuit board in the bending process is further improved, and bending precision of the FPC circuit board is further improved;

3. the limiting plate limits the FPC circuit board from the width direction of the FPC circuit board, so that stability of the FPC circuit board in the bending process is further improved, and bending precision of the FPC circuit board is further improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a pre-bending fixture for a high-precision FPC circuit board according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view for showing a sliding assembly in an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view for showing an L-shaped plate in an embodiment of the present application.

Fig. 4 is a schematic diagram of the FPC board after being folded after the upper module is hidden in the embodiment of the present application.

Fig. 5 is a schematic structural view for showing a limiting plate in an embodiment of the present application.

Fig. 6 is an exploded view for illustrating the positioning block in the embodiment of the present application.

Reference numerals illustrate: 1. a frame; 2. a lower module; 21. a carrying platform; 3. an upper module; 31. a cylinder; 32. briquetting; 321. a groove; 33. a receiving groove; 4. an FPC circuit board; 5. a retaining plate; 51. a sliding assembly; 511. a guide block; 5111. a guide groove; 512. a first extension spring; 513. a limiting block; 514. a limit groove; 6. a side plate; 61. a relief groove; 7. a positioning assembly; 71. an L-shaped plate; 711. a vertical section; 712. a horizontal section; 72. a second extension spring; 73. dovetail blocks; 74. a dovetail groove; 8. a limiting plate; 81. a slide block; 82. a chute; 83. a screw; 84. butterfly handles; 9. a vertical plate; 91. a positioning block; 92. a positioning groove; 93. and (3) rolling balls.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-6.

The embodiment of the application discloses a high accuracy is preflex and is folded tool for FPC circuit board. Referring to fig. 1, the pre-bending jig for the high-precision FPC circuit board comprises a frame 1, wherein the frame 1 is C-shaped, a lower module 2 and an upper module 3 which are matched for use are arranged on the frame 1, the lower module 2 is fixedly installed on the top surface of the lower horizontal part of the frame 1, the upper module 3 is arranged in a lifting manner, an air cylinder 31 for driving the upper module 3 to lift is arranged on the top surface of the upper horizontal part of the frame 1, and a piston rod of the air cylinder 31 penetrates through the upper horizontal part of the frame 1 and is fixedly connected with the top surface of the upper module 3. In this embodiment, two ends of the FPC circuit board 4 in the length direction are to-be-bent parts and to-be-bent downwards, a carrying table 21 is fixedly mounted at the center position of the lower module 2, the width of the carrying table 21 is consistent with that of the FPC circuit board 4, the FPC circuit board 4 is located on the carrying table 21, the middle part of the FPC circuit board 4 in the length direction is in contact with the carrying table 21, press blocks 32 are arranged at two ends of the upper module 3 in the length direction, the press blocks 32 are located above the to-be-bent parts of the FPC circuit board 4, a groove 321 is formed between the two press blocks 32, and the middle part of the upper module 3 is the groove 321.

Referring to fig. 1 and 2, the upper mold 3 may be lowered to the press block 32 to press the FPC board 4, and the upper mold 3 may be raised to the press block 32 to disengage from the FPC board 4. The middle part of the bottom surface of the upper module 3 is slidably provided with a retaining plate 5, the retaining plate 5 is positioned right above the bearing table 21, in the descending process of the upper module 3, the retaining plate 5 is abutted against the middle part of the FPC circuit board 4 in the length direction before the pressing block 32, the bottom wall of the groove 321 is provided with a containing groove 33, and the retaining plate 5 can slide to be completely positioned in the containing groove 33. In this embodiment, both ends in the length direction of the carrying table 21 and the sides, close to each other, of the pressing block 32 are arc-shaped, so that damage to the FPC board 4 caused by bending is reduced.

When the FPC circuit board 4 is subjected to pre-bending treatment, the FPC circuit board 4 is firstly placed on the bearing table 21 of the lower module 2, the pressing block 32 of the upper module 3 is aligned with the bending position of the FPC circuit board 4, and then the air cylinder 31 is started to drive the upper module 3 to descend until the pressing block 32 bends the bending position of the FPC circuit board 4. In the descending process of the upper module 3, as no bearing object exists below the to-be-bent position of the FPC circuit board 4, the possibility of displacement of the FPC circuit board 4 exists when the pressure is applied, the abutting board 5 abuts against the FPC circuit board 4 before the pressing block 32 abuts against the part of the FPC circuit board 4 on the bearing table 21, so that the to-be-bent position of the FPC circuit board 4 contacts with the pressing block 32 and is not easy to displace when the pressure is applied, the stability of the FPC circuit board 4 in the bending process is improved, and the bending precision of the FPC circuit board 4 is improved; when the pressing block 32 contacts with the to-be-bent part of the FPC circuit board 4 and gradually presses downwards, the retaining plate 5 is always abutted with the part of the FPC circuit board 4 on the bearing table 21, and the retaining plate 5 gradually slides upwards to be completely positioned in the accommodating groove 33, so that the influence on bending and forming of the FPC circuit board 4 is reduced.

Referring to fig. 1 and 2, the top surface on the butt plate 5 is equipped with slip subassembly 51, slip subassembly 51 includes guide block 511 and first extension spring 512, offer on the diapire of holding tank 33 and supply the gliding guide slot 5111 of guide block 511, the week lateral wall of guide block 511 is laminated with the inner wall of guide slot 5111, the one end of guide block 511 and the one side fixed connection who keeps away from lower module 2 of butt plate 5, the one end fixed connection of guide block 511 and first extension spring 512 has played the guide effect to the extension and contraction of first extension spring 512, reduce the possibility that flexible in-process of first extension spring 512 rocked, stability that the butt plate 5 moved has been improved, be difficult for causing FPC circuit board 4 skew when butt plate 5 and FPC circuit board 4 butt, bending accuracy of FPC circuit board 4 has further been improved. One end of the first extension spring 512 far away from the guide block 511 is fixedly connected with the bottom wall of the guide groove 5111, and when the first extension spring 512 is in a natural state, the bottom surface of the retaining plate 5 is lower than the bottom surface of the pressing block 32. Two ends of the retaining plate 5 in the length direction are fixedly connected with a limiting block 513 respectively, and limiting grooves 514 for sliding the limiting block 513 are formed in the inner walls of the grooves 321, so that the moving stability of the retaining plate 5 is further improved.

According to the practical situation, the first expansion springs 512 with proper rigidity are selected, when the upper module 3 descends to the abutting plate 5 to be in contact with the FPC circuit board 4, the first expansion springs 512 are compressed, the first expansion springs 512 restore to the original state, an acting force towards the FPC circuit board 4 is generated on the abutting plate 5, in the process that the upper module 3 descends continuously, the first expansion springs 512 are compressed continuously, the abutting plate 5 supports the FPC circuit board 4 at all times, and when the upper module 3 ascends, the first expansion springs 512 are relaxed, so that the abutting plate 5 returns to the original state.

Referring to fig. 1, 3 and 4, two ends of the lower module 2 in the length direction are vertically provided with a side plate 6, the positions of the side plates 6 are set according to the length of the FPC circuit board 4 and the positions of the bending positions of the side plates, one side of each side plate 6, which is close to each other, is provided with a group of positioning components 7, each group of positioning components 7 comprises an L-shaped plate 71, each L-shaped plate 71 comprises a vertical section 711 and a horizontal section 712, each horizontal section 712 is rotationally connected with the corresponding vertical section 711 through a torsion spring, the corresponding rotating shaft is located at one side far away from the FPC circuit board 4, a yielding groove 61 is formed in one side of each side plate 6, each horizontal section 712 can be rotated to be completely located in the yielding groove 61, one side, which is close to each other, of the two vertical sections 711 in the two groups of positioning components 7 is abutted against the side walls at two ends of the FPC circuit board 4 in the length direction, and the top surface of each horizontal section 712 is flush with the top surface of the bearing table 21. When no external force is applied, the horizontal section 712 keeps a horizontal state under the action of the torsion spring, when the FPC circuit board 4 is placed on the bearing table 21, two ends of the length direction of the FPC circuit board 4 are limited by the L-shaped board 71, alignment and positioning of the length direction of the FPC circuit board 4 are automatically realized, stability of the FPC circuit board 4 in the bending process is further improved, and bending precision of the FPC circuit board 4 is further improved.

When the pressing block 32 is pressed down, the horizontal section 712 rotates towards a direction away from the FPC circuit board 4 under the action of external force until the horizontal section rotates to be completely positioned in the abdication groove 61, so that the influence on the descending of the FPC circuit board 4 and the upper module 3 is reduced; when the upper mold 3 is lifted and the FPC board 4 is taken out, the horizontal section 712 automatically returns to the original position under the action of the torsion spring without the action of external force.

Referring to fig. 1, 3 and 4, the vertical sections 711 are also located in the yielding grooves 61, the second telescopic springs 72 are fixedly connected to the surfaces of the two vertical sections 711, which are far away from each other, one ends of the second telescopic springs 72, which are far away from the vertical sections 711, are fixedly connected with the bottom wall of the yielding grooves 61, and the depth of the yielding grooves 61 is greater than the thickness of the vertical sections 711, so that sufficient movable space is provided for the vertical sections 711. In the bending process of the FPC circuit board 4, the second telescopic spring 72 is compressed to drive the L-shaped plate 71 to move towards the direction away from the FPC circuit board 4, so that the possibility of clamping in the bending process of the FPC circuit board 4 is reduced, friction between the L-shaped plate 71 and the FPC circuit board 4 is also reduced, and abrasion to the FPC circuit board 4 is reduced. After the second extension spring 72 is compressed, in order to restore to the original length, an urging force is applied to the L-shaped plate 71 against the FPC board 4, so that the vertical section 711 can move while keeping the limiting action on both ends of the FPC board 4 in the length direction. A dovetail block 73 is fixedly connected to the top surface of the vertical section 711, and a dovetail groove 74 for sliding the dovetail block 73 is formed in the top wall of the yielding groove 61, so that the vertical section 711 can stably slide.

Referring to fig. 1 and 5, two limiting plates 8 are oppositely arranged on the lower module 2, the limiting plates 8 are located on two sides of the width direction of the FPC circuit board 4, one side, close to each other, of each limiting plate 8 is abutted to the side walls on two sides of the width direction of the FPC circuit board 4, the FPC circuit board 4 is limited in the width direction of the FPC circuit board 4, stability in the bending process of the FPC circuit board 4 is further improved, and bending precision of the FPC circuit board 4 is further improved. The limiting plates 8 which are oppositely arranged slide towards the directions close to or far away from each other, a sliding block 81 is arranged on the bottom surface of each limiting plate 8, a sliding groove 82 for sliding the sliding block 81 is formed in the top surface of the lower module 2, a screw rod 83 is arranged in the sliding groove 82, two sections of threads with opposite directions are arranged on the screw rod 83, the two sliding blocks 81 are respectively matched with the two sections of threads, the screw rod 83 is in threaded connection with the sliding blocks 81, the screw rod 83 is rotationally connected with the inner wall of the sliding groove 82 to drive the sliding blocks 81 to slide towards the directions close to or far away from each other, and accordingly the limiting plates 8 are driven to slide towards the directions close to or far away from each other. One end of the screw 83, which is far away from the vertical part of the frame 1, penetrates out of the lower module 2 and is fixedly connected with a butterfly handle 84, so that a worker can conveniently rotate the screw 83.

When the FPC circuit board 4 is required to be placed, the screw 83 is rotated to drive the limiting plates 8 to slide in the directions away from each other, after the FPC circuit board 4 is placed, the screw 83 is rotated reversely again to drive the limiting plates 8 to slide in the directions close to each other until one sides of the limiting plates 8 close to each other are abutted with the side walls of the FPC circuit board 4, so that the possibility of friction between the FPC circuit board 4 and the limiting plates 8 is reduced, and the abrasion to the FPC circuit board 4 is further reduced.

Referring to fig. 1 and 6, a vertical plate 9 is vertically disposed on one side of the lower module 2 in the width direction, a positioning block 91 is fixedly connected to one side of the upper module 3 in the width direction, which is close to the vertical portion of the frame 1, and the positioning block 91 is located at a position of the upper module 3, which is close to the bottom, a positioning slot 92 through which the positioning block 91 passes is formed in one side of the vertical plate 9, which is close to the FPC circuit board 4, the positioning block 91 is matched with the positioning slot 92, and is in a dovetail shape, and the positioning block 91 is always located in the positioning slot 92. When the upper module 3 is lifted, the positioning block 91 slides in the positioning groove 92, so that the upper module 3 is limited and guided, the accuracy of the contact position between the upper module 3 and the FPC circuit board 4 is improved, and the bending precision of the FPC circuit board 4 is further improved. The locating block 91 is close to the one side of constant head tank 92 diapire and inlays and be equipped with a plurality of balls 93 for friction between locating block 91 and the constant head tank 92 diapire is rolling friction, has improved the gliding smoothness nature of locating block 91 in constant head tank 92, has reduced the possibility that locating block 91 blocked, has reduced the influence to the upper module 3 lift process when locating block 91 plays spacing and direction effect.

The implementation principle of the pre-bending jig for the high-precision FPC circuit board is as follows: when the FPC circuit board 4 is subjected to pre-bending treatment, the screw 83 is rotated to drive the limiting plate 8 to slide in the direction away from each other, then the FPC circuit board 4 is placed on the bearing table 21 of the lower module 2, at the moment, two ends of the length direction of the FPC circuit board 4 are limited by the L-shaped plate 71, then the screw 83 is slowly rotated to drive the limiting plate 8 to slide in the direction close to each other until the side wall of the width direction of the FPC circuit board 4 is abutted against, at the moment, the circumference of the FPC circuit board 4 is limited, then the air cylinder 31 is started, the piston rod of the air cylinder 31 extends out to drive the upper module 3 to descend, the abutting plate 5 is abutted against the FPC circuit board 4 before the pressing block 32, the part of the FPC circuit board 4 on the bearing table 21 is abutted against until the pressing block 32 bends the part to be bent of the FPC circuit board 4, in the process, the abutting plate 5 continuously slides upwards until the part is completely located in the containing groove 33, and the vertical section 711 and the horizontal section 712 of the L-shaped plate 71 are all movable until the part is completely located in the yielding groove 61.

When the FPC circuit board 4 needs to be taken out, the piston rod of the air cylinder 31 is retracted, the upper module 3 is driven to ascend, the screw 83 is rotated again to drive the limiting plate 8 to slide towards the direction away from each other, the FPC circuit board 4 is taken out, the resisting plate 5 is automatically reset under the action of the first telescopic spring 512, the horizontal section 712 of the L-shaped plate 71 is automatically reset under the action of the torsion spring, and the vertical section 711 of the L-shaped plate 71 is automatically reset under the action of the second telescopic spring 72 so as to position the next FPC circuit board 4.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a high accuracy FPC is preflex jig for circuit board which characterized in that: the flexible printed circuit board bending machine comprises a frame (1), wherein a lower module (2) and an upper module (3) which are matched for use are arranged on the frame (1), a bearing table (21) is arranged at the center of the lower module (2), an FPC circuit board (4) is positioned on the bearing table (21), pressing blocks (32) are arranged at two ends of the upper module (3) in the length direction, the pressing blocks (32) are positioned above a part to be bent of the FPC circuit board (4), the upper module (3) is arranged in a lifting mode, the upper module (3) can be lowered to the pressing blocks (32) to bend the FPC circuit board (4), and the upper module (3) can also be lifted to the pressing blocks (32) to be separated from the FPC circuit board (4);

the upper module (3) is provided with a retaining plate (5) in a sliding manner on the bottom surface, the retaining plate (5) is located above the bearing table (21), in the descending process of the upper module (3), the retaining plate (5) is abutted to the FPC circuit board (4) before the pressing block (32), the upper module (3) is provided with a containing groove (33), and the retaining plate (5) can slide to be completely located in the containing groove (33).

2. The pre-bending jig for high-precision FPC boards according to claim 1, wherein: be equipped with slip subassembly (51) on butt plate (5), slip subassembly (51) include guide block (511) and first extension spring (512), offer on the diapire of holding tank (33) and supply gliding guide way (5111) of guide block (511), the inner wall laminating of peripheral lateral wall and guide way (5111) of guide block (511), the one end of guide block (511) is kept away from with butt plate (5) and is connected with the one side of lower module (2), the other end and the first extension spring (512) of guide block (511) are connected, the one end and the diapire of guide way (5111) of guide block (511) are kept away from to first extension spring (512) are connected.

3. The pre-bending jig for high-precision FPC boards according to claim 1, wherein: the utility model discloses a lower module (2) both ends each vertically are provided with a curb plate (6), each be equipped with a set of locating component (7) on the one side that curb plate (6) are close to each other, every group locating component (7) are including an L template (71), L template (71) are including vertical section (711) and horizontal section (712), horizontal section (712) are connected and the axis of rotation is located one side of keeping away from FPC circuit board (4) through torsional spring and vertical section (711) rotation, offer groove (61) on the one side that curb plate (6) are close to each other, horizontal section (712) rotatable to be located completely in groove (61) of stepping down, two sets of the one side that two vertical sections (711) are close to each other in locating component (7) and the lateral wall butt at FPC circuit board (4) both ends, the top surface of horizontal section (712) flushes with the top surface of plummer (21).

4. The pre-bending jig for a high-precision FPC circuit board according to claim 3, wherein: the vertical sections (711) are also positioned in the yielding grooves (61), the two sides of the vertical sections (711) which are far away from each other are connected with a second telescopic spring (72), one end of the second telescopic spring (72) which is far away from the vertical sections (711) is connected with the bottom wall of the yielding groove (61), and the depth of the yielding groove (61) is larger than the thickness of the vertical sections (711).

5. The pre-bending jig for high-precision FPC boards according to claim 1, wherein: the lower module (2) is provided with limiting plates (8), the limiting plates (8) are positioned on two sides of the width direction of the FPC circuit board (4), and one side, close to each other, of each limiting plate (8) is abutted to the side walls on two sides of the width direction of the FPC circuit board (4).

6. The pre-bending jig for high-precision FPC boards according to claim 5, wherein: limiting plates (8) slide towards directions close to or away from each other, each limiting plate (8) is provided with a sliding block (81) on the bottom surface, sliding grooves (82) for sliding the sliding blocks (81) are formed in the top surface of a lower module (2), screw rods (83) are arranged in the sliding grooves (82), two sections of threads with opposite directions are arranged on the screw rods (83), the two sliding blocks (81) are matched with the two sections of threads respectively, the screw rods (83) are in threaded connection with the sliding blocks (81), and the screw rods (83) are in rotary connection with the inner walls of the sliding grooves (82).

7. The pre-bending jig for high-precision FPC boards according to claim 6, wherein: one end of the screw rod (83) penetrates out of the lower module (2) and is connected with a butterfly handle (84).

8. The pre-bending jig for high-precision FPC boards according to claim 1, wherein: the utility model discloses a die, including upper die piece (3), lower die piece (2), locating piece (91) are equipped with on one side of upper die piece (3) width direction, vertical board (9) are provided with on one side of lower die piece (2) width direction vertically, be equipped with on vertical board (9) and supply locating slot (92) that locating piece (91) worn to establish, locating piece (91) and constant head tank (92) cooperation use.

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