A bending corner processing device for a flexible printed circuit board

Abstract

The present invention relates to the technical field of electrical component manufacturing equipment, and discloses a bending and corner processing device for a flexible printed circuit board. The device includes a transfer part, and a pre-bending part for preliminarily bending the flexible printed circuit board and a bending part for completely bending the flexible printed circuit board are sequentially arranged outside the transfer part. The transfer part includes a rotating part, and cover plates are fixedly connected to both the upper and lower ends of the rotating part. Fixed shafts are uniformly and fixedly connected to the circumferential outer surface of the rotating part, and positioning parts are fixedly connected to the other ends of the fixed shafts. A limiting part is arranged inside the positioning part. The invention can comprehensively limit the unbent flexible printed circuit board, ensure that the flexible printed circuit board does not undergo uneven bending before bending, when pre-bending and completely bending, the top end of the flexible printed circuit board is restricted by the flexible plate, the bottom end is supported by the support plate, and the bending angle of the abutment frame protects the bending area of the flexible printed circuit board, avoiding uneven bending of the bending area of the flexible printed circuit board during the transfer process.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing electrical components, and particularly relates to a bending and corner processing device for flexible printed circuit boards. Background Art

[0002] The bending and corner processing technology of flexible printed circuit boards is an important link in their production process. The main purpose is to meet the requirements of miniaturization, lightweight, and high-density installation of electronic products. After ensuring that the surface of the flexible printed circuit board is clean, free of oil, dust, etc., the material is preheated to improve its flexibility. Then, different bending processes are selected according to the batch and shape of the flexible printed circuit board. Flexible printed circuit boards in small batches or with complex shapes are bent manually, and flexible printed circuit boards in large-scale production are bent by a bending machine die to ensure the consistency of bending.

[0003] When the existing bending machine performs a bending operation, the flexible printed circuit board is first accurately placed at a predetermined position on the die, and the mechanical force jointly exerted by the die of the bending machine causes the flexible printed circuit board to bend along the shape of the die. In order to ensure that the mechanical force can perform a bending process on it, the bending area of the flexible printed circuit board needs to be in a state of unrestricted structure. However, due to the material characteristics of the flexible printed circuit board itself, during the bending and transfer process of the flexible printed circuit board, if only the clamping end is fixed and other parts are free, this may cause uneven bending of the circuit board during bending, resulting in inconsistent bending radii. The uneven bending stress may cause solder joints to fall off or components to be damaged, resulting in the bending angle not meeting the design requirements and affecting the function of the product. Uneven bending may cause separation between layers, which may lead to conductor breakage or insulation layer damage in this area. Summary of the Invention

[0004] Technical Problems to be Solved

[0005] Aiming at the above-mentioned shortcomings of the existing technology, the present invention provides a bending and corner processing device for flexible printed circuit boards, which can effectively solve the problem of uneven bending of the flexible printed circuit board before bending due to incomplete fixing positions in the existing technology.

[0006] Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0008] The present invention provides a bending and corner processing device for flexible printed circuit boards, including:

[0009] A transfer part for limiting a flexible circuit board. A pre-bending part for preliminarily bending the flexible circuit board and a bending part for completely bending the flexible circuit board are sequentially arranged outside the transfer part. The transfer part includes a rotating part, and cover plates are fixedly connected to both the upper and lower ends of the rotating part. Fixed shafts are evenly and fixedly connected to the circumferential outer surface of the rotating part, and a positioning part is fixedly connected to the other end of each fixed shaft. A limiting part for limiting the flexible circuit board before and after bending is arranged inside the positioning part.

[0010] Further, an electric telescopic rod is fixedly connected to the inner top end of the positioning part, a positioning block is fixedly connected to the bottom end of the electric telescopic rod, the positioning block is slidably connected to the inner wall of the positioning part, a positioning plate is arranged at the inner bottom end of the positioning part, a positioning groove is formed on the side of the positioning plate away from the positioning part, a linkage part is arranged inside the positioning groove, and the other end of the linkage part is connected to the side of the limiting part.

[0011] Further, the limiting part includes a limiting plate one arranged at the middle position on the outer side of the positioning plate. The two ends of the limiting plate one are connected to a limiting plate two through connecting rods symmetrically arranged on its outer side. Rotating shafts are rotatably connected to the two sides of the limiting plate through damping. A resisting frame is fixedly connected to the middle of the circumferential outer surface of the rotating shaft. Side blocks are symmetrically and fixedly connected to the side of the circumferential outer surface of the rotating shaft parallel to the resisting frame. The side away from the resisting frame of the side block is in close fit with a blocking part, and the other end of the blocking part is elastically connected to the inner wall of the limiting plate two. A supporting plate is elastically connected between the inner sides of the limiting plate one and the limiting plate two. A flexible plate is fixedly connected to the side of the positioning block away from the positioning part.

[0012] Further, notch one is formed on both sides of the limiting plate one, a bottom groove is formed on one side of the bottom end of the limiting plate one, limiting grooves are formed on both sides of the limiting plate one, a connecting rod is arranged inside the limiting groove, the side of the connecting rod close to the positioning plate is rotatably connected to the inner wall of the limiting groove, the side of the connecting rod away from the positioning plate is slidably connected to the inner wall of the limiting groove, a main shaft one is rotatably connected to the side of the connecting rod away from the positioning plate, a cross plate one is sleeved on the outer side of the main shaft one, and an elastic piece one is elastically connected to the top end of the main shaft one. In the initial state, the elastic piece one is located inside the main shaft one on the side close to the positioning part.

[0013] Further, the linkage part includes a tooth shaft rotatably connected inside the positioning groove. The tooth shaft penetrates through notch one, a gear is fixedly connected to the end of the tooth shaft away from the positioning groove, the gear penetrates through the bottom groove at the bottom end, the gear is embedded inside the limiting plate one, L-shaped racks are symmetrically meshed with the circumferential outer surface of the tooth shaft, a positioning rod is fixedly connected to the other end of the L-shaped rack, and the other end of the positioning rod is fixedly connected to the two sides of the limiting plate.

[0014] Further, notch two is provided at both ends of the limiting plate two, and a second horizontal plate is slidably connected to the inner side of the notch two. In the initial state, the second horizontal plate is in contact with the stopper, so that the stopper is in close contact with the side block, the rotating shaft is restricted from rotating, a groove is provided on the side of the second horizontal plate close to the abutting frame, and a second elastic sheet is elastically connected to the top end of the second horizontal plate. In the initial state, the second elastic sheet is in contact with the bottom end of the support plate. A second main shaft is fixedly connected to the middle of the second horizontal plate, and the second main shaft is rotatably connected to the side of the connecting rod away from the positioning plate.

[0015] Further, an annular groove is provided at a position on the surface of the cover plate away from the center of the circle, a toothed plate is fixedly arranged inside the annular groove, an inclined groove is provided on the side of the annular groove, and the positioning member is located above the annular groove.

[0016] Beneficial effects

[0017] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0018] The present invention is provided with a linkage member. When the electric telescopic rod is started, it drives the positioning block to move downward. The positioning block drives the flexible plate to move downward until the bottom end of the flexible plate made of flexible material is in contact with the top end of the flexible circuit board. The upper and lower surfaces of the flexible circuit board are respectively in contact with the flexible plate and the support plate, and as the rotating member drives the fixed shaft to rotate, when the fixed shaft drives the positioning member to rotate, the flexible circuit board rotates towards the pre-bending section of the flexible circuit board, that is, the pre-bending part. During this process, the gear is meshed with the toothed plate. As the gear rotates, it drives the tooth shaft to rotate. The rotation of the tooth shaft drives the two L-shaped racks to move in opposite directions. The L-shaped racks drive the limiting plate two to move towards the limiting plate one, realizing the contraction of the lower fixed section. Then, the pre-bending part pre-bends the flexible circuit board. The flexible plate deforms with the pre-bending pressure. The connecting rod deforms as the distance between the limiting plate one and the limiting plate two changes. The movement of the connecting rod drives the second horizontal plate in the limiting plate two to move. The movement of the second horizontal plate no longer restricts the position of the stopper. The movement of the stopper no longer restricts the position of the abutting frame. When the flexible circuit board is pre-bent, its top end is restricted by the flexible plate, and its bottom end is supported by the support plate. The bending angle of the abutting frame focuses on protecting the bending area of the flexible circuit board, avoiding uneven bending of the bending area of the flexible circuit board during subsequent transfer.

[0019] In the present invention, by providing a limiting member, when the limiting member moves to the pre-bending portion area, the second limiting plate moves towards the first limiting plate to contract, changing the supporting area for the flexible circuit board, reducing the size of the overall support for the flexible circuit board to the size required for bending. The deformation of the connecting rod drives the movement of the second main shaft in the second limiting plate and the first main shaft in the first limiting plate respectively. The movement of the second main shaft drives the movement of the second cross plate. When the second cross plate moves into the second notch, it no longer supports the bottom end of the second cross plate, reducing the friction between the supporting plate and the flexible circuit board during the movement of the second limiting plate. At the same time, the movement of the second cross plate drives the movement of the groove, and the groove no longer limits the stopper. The stopper no longer engages and limits the abutting frame, and the abutting frame changes from a state fixed on both sides of the limiting plate to a state that can rotate on both sides of the limiting plate. The movement of the first main shaft drives the movement of the first cross plate, and the movement of the first cross plate drives the movement of the first elastic piece, moving from a state of being engaged in the first notch to a state in the middle of the first limiting plate. The first elastic piece supports the supporting plate, and the supporting plate moves upward by a certain displacement, so that the supporting plate is closely attached to the flexible circuit board, thereby ensuring that the position of the flexible circuit board will not shift during the bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the overall structure of the embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the transfer portion structure of the embodiment of the present invention;

[0023] Figure 3 Perspective schematic diagram of the connection structure of the positioning member and the limiting member of the embodiment of the present invention;

[0024] Figure 4 Perspective schematic diagram of the connection structure of the linkage member of the embodiment of the present invention;

[0025] Figure 5 Schematic diagram of the internal separation of the second limiting plate of the embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the internal structure of the supporting plate of the embodiment of the present invention;

[0027] Figure 7 Schematic diagram of the cover plate structure of the embodiment of the present invention.

[0028] The reference numerals in the figure respectively represent: 1. Transfer part; 11. Cover plate; 12. Rotating part; 13. Fixed shaft; 14. Positioning part; 141. Electric telescopic rod; 142. Positioning block; 145. Positioning plate; 146. Positioning groove; 15. Limiting part; 151. First limiting plate; 1511. First notch; 1512. Bottom groove; 1513. First cross plate; 1514. First elastic sheet; 1515. First main shaft; 152. Supporting plate; 153. Connecting rod; 154. Limiting groove; 155. Second limiting plate; 1551. Second notch; 1552. Second cross plate; 1553. Groove; 1554. Second elastic sheet; 1555. Second main shaft; 156. Bracing frame; 157. Flexible plate; 158. Rotating shaft; 1581. Side block; 159. Stopping part; 161. Tooth shaft; 162. Gear; 163. L-shaped rack; 164. Positioning rod; 17. Tooth plate; 18. Oblique groove; 19. Ring groove; 2. Pre-bending part; 3. Bending part. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] The present invention will be further described below with reference to the embodiments.

[0031] Embodiment:

[0032] Please refer to Figures 1-7 , the present invention provides a technical solution. A bending and corner processing device for a flexible printed circuit board includes:

[0033] Reference Figure 1 and Figure 2 , the bending device includes a transfer part 1 for transferring the flexible printed circuit board. The outside of the transfer part 1 is evenly divided into four parts, namely a loading area for receiving the flexible printed circuit board, a pre-bending part 2 for pre-bending the flexible printed circuit board, a bending part 3 for completely bending the flexible printed circuit board, and an area for unloading the bent flexible printed circuit board. The transfer part 1 includes a rotating part 12 arranged in the middle. A plurality of fixed shafts 13 are fixedly connected to the outer circumference of the rotating part 12. As Figure 3 shown, in the present invention, there are four and they are evenly arranged outside the rotating part 12. The other end of the fixed shaft 13 is fixedly connected to a positioning part 14. The positioning part 14 is located above the cover plate 11. As Figure 7As shown, a ring groove 19 is formed on the surface of the cover plate 11. The ring groove 19 is located at a position away from the center of the cover plate 11 itself, and the width dimension of the ring groove 19 is smaller than the width dimension of the positioning member 14. The rotating member 12 can drive the positioning member 14 to rotate on the surface of the cover plate 11 through the fixed shaft 13. Both ends of the rotating member 12 are fixedly connected to the cover plate 11 that restricts the movement trajectories of the positioning member 14 and the limiting member 15.

[0034] As Figure 2 , Figure 3 and Figure 4 shown, a telescopic electric rod 141 is fixedly connected to the top end of the inner wall of the positioning member 14. The bottom end of the telescopic electric rod 141 is fixedly connected to a positioning block 142. A flexible plate 157 is fixedly connected to the side of the positioning block 142 away from the positioning member 14. The positioning block 142 is slidably connected to the inner wall of the positioning member 14. When the telescopic electric rod 141 extends, it drives the positioning block 142 to move on the inner wall of the positioning member 14. The positioning block 142 drives the flexible plate 157 to move downward. A positioning plate 145 is arranged at the bottom end of the inner wall of the positioning member 14. The positioning plate 145 is composed of two plates, and the two plates are rotatably connected through a penetrating rotating shaft. The two plates of the positioning plate 145 are attached to the surface of the cover plate 11 and can slide in a horizontal state on the surface of the cover plate 11. An inclined groove 18 is formed on the side of the ring groove 19. The size of the inclined groove 18 is larger than the size of the plate. When the positioning plate 145 moves above the inclined groove 18, the outer plate rotates to an inclined state with the rotating shaft as the center. A positioning groove 146 is formed on the side of the outer plate away from the positioning member 14. A first limiting plate 151 is fixedly connected to the middle of the positioning groove 146. Two second limiting plates 155 slide symmetrically in the positioning groove 146 with the first limiting plate 151 as the center. Limiting grooves 154 are formed on the side of the second limiting plate 155 close to the first limiting plate 151 and on both sides of the second limiting plate 155. A connecting rod 153 is arranged inside the limiting groove 154. One side of the connecting rod 153 close to the positioning plate 145 is rotatably connected to the inner wall of the limiting groove 154, and the side of the connecting rod 153 away from the positioning plate 145 is slidably connected to the inner wall of the limiting groove 154. In the initial state, the connecting rod 153 is in an extended state, the distance between the first limiting plate 151 and the second limiting plate 155 is the shortest, and the side of the connecting rod 153 away from the positioning plate 145 is located in the middle of the limiting groove 154.

[0035] As Figure 3 , Figure 5 and Figure 6As shown, the limiting member 15 further includes a resisting frame 156 disposed on the side of the second limiting plate 155. The resisting frame 156 is composed of a resisting plate and an L-shaped frame. The bottom end of the resisting plate is fixedly connected to the L-shaped frame, and the other end of the L-shaped frame is fixedly connected to the middle of the outer surface of the circular shaft of the rotating shaft 158. In the initial state, the resisting plate is close to the second limiting plate 155, and an activity groove is provided on the resisting frame 156. The inner side of the sliding groove is in damping rotation with the rotating shaft 158, and the damping force between the two is much greater than the self-gravity of the resisting frame 156. The resisting frame 156 will not cause the rotating shaft 158 to rotate when not subjected to external forces. The rotating shaft 158 penetrates through one side of the second limiting plate 155. Two side blocks 1581 are symmetrically and fixedly connected to the side of the outer surface of the circular shaft of the rotating shaft 158 parallel to the upper surface of the second limiting plate 155. In the initial state, the outer sides of the side blocks 1581 are in close fit with the blocking member 159, and the side blocks 1581 cannot rotate inside the activity groove. The blocking member 159 includes a rectangular plate that fits against the outer side of the side block 1581. A fixing rod is fixedly connected to the middle of the side of the rectangular plate away from the rotating shaft 158, and a compression spring is sleeved on the outer side of the fixing rod.

[0036] As Figure 5 As shown, notch openings 1551 are provided at both ends of the second limiting plate 155. A circular groove is provided on the side of the notch opening 1551 close to the resisting frame 156. The compression spring of the blocking member 159 is installed inside the circular groove. One end of the fixing rod of the blocking member 159 penetrates through the circular groove and fits against the side of the second cross plate 1552. The size of the rectangular plate of the blocking member 159 is larger than the size of the circular groove. In the initial state, the grooves 1553 equidistantly provided on the side of the second cross plate 1552 are all located on the side close to the positioning plate 145 of the groove 1553, and the second elastic piece 1554 elastically connected to the top end of the second cross plate 1552 is in fit with the bottom end of the supporting plate 152 to support and limit the second cross plate 1552. The supporting plate 152 includes a sliding plate. A tension spring is elastically connected to the bottom end of the sliding plate, and the bottom end of the tension spring is connected to the inner bottom end of the second limiting plate 155. In the initial state, the sliding plate of the supporting plate 152 is in fit with the flexible circuit board under the combined action of the tension spring and the second elastic piece 1554. A second main shaft 1555 is fixedly connected to the middle of the second cross plate 1552. One end of the second main shaft 1555 is rotatably connected to the side of the connecting rod 153 away from the positioning plate 145;

[0037] When the distance between the first limiting plate 151 and the second limiting plate 155 is shortened, the connecting rod 153 drives the second main shaft 1555 connected to it to move. The second main shaft 1555 drives the second cross plate 1552 to move, and the second elastic piece 1554 that supports the bottom end of the supporting plate 152 is moved into the notch opening 1551. The second elastic piece 1554 deforms under the restriction of the notch opening 1551 and no longer supports the bottom end of the supporting plate 152. The cross plate of the supporting plate 152 moves downward by a slight displacement, reducing the frictional resistance between the surface of the supporting plate 152 and the flexible circuit board, so that the supporting plate 152 will not cause frictional damage to the surface of the flexible circuit board when moving towards the first limiting plate 151 along with the second limiting plate 155.

[0038] While the connecting rod 153 drives the second main shaft 1555 and the second cross plate 1552 to move, the contact surface between the second cross plate 1552 and the stopper 159 moves from the flush plane to the groove 1553. The groove 1553 does not limit the stopper 159, and the elastic deformation of the compression spring of the stopper 159 is restored. The elastic force drives the stopper 159 to move towards the second limiting plate 155. The rectangular plate of the stopper 159 no longer tightly fits against the side block 1581 to limit it. The rotating shaft 158 damping-connected to the side of the second limiting plate 155 can drive the abutting frame 156 to rotate. When pre-bending and bending the flexible circuit board, the stopper 159 no longer limits the abutting frame 156. The abutting frame 156 can rotate outside the second limiting plate 155 and protect the transferred flexible circuit board after bending, avoiding uneven stress on the bending degree during the transfer process, and ensuring that the flexible circuit board has support and protection during the transfer before and after bending.

[0039] As Figure 4 、 Figure 6 and Figure 7 shown, both ends of the first limiting plate 151 are provided with first notches 1511. The middle of the first notch 1511 on the side close to the positioning plate 145 penetrates through the tooth shaft 161 of the linkage member. The tooth shaft 161 is rotatably connected to the middle of the inner side of the positioning groove 146. A gear 162 is fixedly connected to the side of the tooth shaft 161 away from the positioning groove 146. The bottom end of the gear 162 penetrates through the bottom groove 1512 and is meshed with the toothed plate 17. Two L-shaped toothed racks 163 are symmetrically meshed on the outer surface of the tooth shaft 161. The two ends of the L-shaped toothed rack 163 are fixedly connected with positioning rods 164. The positioning rods 164 and the L-shaped toothed rack 163 can slide inside the positioning groove 146. The toothed plate 17 is located at the bottom end inside the annular groove 19, and the toothed plate 17 is provided in two sides. The first one is arranged on the flexible circuit board outside the transfer part 1 when loading the flexible circuit board into the pre-bending area of the flexible circuit board, and the second one is arranged in the inclined groove 18, that is, when unloading the flexible circuit board to the loading area of the flexible circuit board. The tooth directions of the two toothed plates 17 are opposite;

[0040] After the flexible circuit board is conveyed to the area of the limiting member 15 by the conveyor belt, the electric telescopic rod 141 is activated to drive the positioning block 142 to move downward. The positioning block 142 drives the flexible plate 157 to move downward until the bottom end of the flexible plate 157 made of flexible material fits against the top end of the flexible circuit board. The upper and lower surfaces of the flexible circuit board are respectively in contact with the flexible plate 157 and the support plate 152, and as the rotating member 12 drives the fixed shaft 13 to rotate, when the fixed shaft 13 drives the positioning member 14 to rotate, the flexible circuit board rotates towards the pre-bending section 2 of the flexible circuit board, that is, in the direction of the pre-bending part 2. During this process, the gear 162 is meshed and connected with the toothed plate 17. As the gear 162 rotates, it drives the toothed shaft 161 to rotate. The rotation of the toothed shaft 161 drives the two L-shaped toothed racks 163 to move in opposite directions. The L-shaped toothed rack 163 drives the second limiting plate 155 to move towards the first limiting plate 151, realizing the contraction of the lower fixed section. Then, the pre-bending part 2 performs a pre-bending treatment on the flexible circuit board. The flexible plate 157 deforms with the pre-bending pressure. The connecting rod 153 deforms as the distance between the first limiting plate 151 and the second limiting plate 155 changes. The movement of the connecting rod 153 drives the cross plate 1552 in the second limiting plate 155 to move. The movement of the cross plate 1552 no longer restricts the position of the blocking member 159, and the movement of the blocking member 159 no longer restricts the position of the abutting frame 156. When the flexible circuit board is pre-bent, its top end is restricted by the flexible plate 157, and its bottom end is supported by the support plate 152. The bending angle of the abutting frame 156 focuses on protecting the bending area of the flexible circuit board to avoid uneven bending of the bending area of the flexible circuit board during subsequent transfer processes.

[0041] When the limiting member 15 moves to the area of the pre-bending part 2, the second limiting plate 155 moves towards the first limiting plate 151 for contraction, changing the supporting area of the flexible printed circuit board, reducing the size of the overall support for the flexible printed circuit board to the size required for bending. The deformation of the connecting rod 153 drives the movement of the second main shaft 1555 in the second limiting plate 155 and the first main shaft 1515 in the first limiting plate 151 respectively. The movement of the second main shaft 1555 drives the movement of the second cross plate 1552. When the second cross plate 1552 moves into the second notch 1551, the bottom end of the second cross plate 1552 is no longer supported, reducing the friction between the supporting plate 152 and the flexible printed circuit board during the movement of the second limiting plate 155. At the same time, the movement of the second cross plate 1552 drives the movement of the groove 1553. When the groove 1553 moves, it no longer limits the stopper 159. The stopper 159 no longer presses the side block 1581, and the rotating shaft 158 can rotate in the movable groove. The abutting frame 156 changes from the state of being fixed to the side of the second limiting plate 155 to the state of being able to rotate on the side of the second limiting plate 155. The movement of the first main shaft 1515 drives the movement of the first cross plate 1513. The movement of the first cross plate 1513 drives the movement of the first elastic piece 1514, moving from the state of being engaged in the first notch 1511 to the middle of the first limiting plate 151. The first elastic piece 1514 supports the supporting plate 152, and the supporting plate 152 moves upward to a certain position, making the supporting plate 152 closely fit with the flexible printed circuit board, thereby ensuring that the position of the flexible printed circuit board does not shift during the bending process at the bending part 3.

[0042] After the bending of the flexible printed circuit board is completed, it rotates above the inclined groove 18. At this time, the positioning plate 145 moves above the inclined groove 18. The plate at the outer side rotates to an inclined state with the rotating shaft as the center. The first limiting plate 151 and the second limiting plate 155 on one side of the plate are both in an inclined state. After the bending is completed, the flexible printed circuit board completes the blanking along the inclined plane under the action of gravity. After the blanking is completed, the rotating part 12 continues to rotate to restore the inclined first limiting plate 151 and the second limiting plate 155 to the position parallel to the flexible plate 157. Then, the gear 162 meshes with the reverse toothed plate 17, and the gear 162 drives the toothed shaft 161 to rotate in the reverse direction, moving the second limiting plate 155 to a position away from the first limiting plate 151, restoring it to the initial state. At the same time, the stopper 159 returns to the position where it presses the side of the side block 1581, making the side block 1581 rotating with the rotating shaft 158 return to the position where it closely fits with the rectangular block of the stopper 159, for the next feeding of the flexible printed circuit board and protecting the whole flexible printed circuit board.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A bending and corner processing device for a flexible printed circuit board, characterized in that, Including: A transfer part (1) for limiting a flexible circuit board. An initial bending part (2) for initially bending the flexible circuit board and a bending part (3) for completely bending the flexible circuit board are sequentially arranged outside the transfer part (1). The transfer part (1) includes a rotating part (12). Cover plates (11) are fixedly connected to both the upper and lower ends of the rotating part (12). Fixed shafts (13) are evenly and fixedly connected to the circumferential outer surface of the rotating part (12). A positioning part (14) is fixedly connected to the other end of the fixed shaft (13). A limiting part (15) for limiting the flexible circuit board before and after bending is arranged inside the positioning part (14); Wherein, an electric telescopic rod (141) is fixedly connected to the inner top end of the positioning part (14), a positioning block (142) is fixedly connected to the bottom end of the electric telescopic rod (141), and a positioning plate (145) is arranged at the inner bottom end of the positioning part (14); The limiting part (15) includes a first limiting plate (151) arranged at the middle position outside the positioning plate (145). Second limiting plates (155) are connected to both ends of the first limiting plate (151) through connecting rods (153) symmetrically arranged on the outer sides thereof. A rotating shaft (158) is rotatably connected to the side of the second limiting plate (155) in a damped manner. A resisting frame (156) is fixedly connected to the middle of the circumferential outer surface of the rotating shaft (158). Side blocks (1581) are symmetrically and fixedly connected to one side of the circumferential outer surface of the rotating shaft (158) parallel to the resisting frame (156). The side of the side block (1581) away from the resisting frame (156) is in close contact with a blocking part (159). The other end of the blocking part (159) is elastically connected to the inner wall of the second limiting plate (155). A supporting plate (152) is elastically connected between the first limiting plate (151) and the second limiting plate (155). A flexible plate (157) is fixedly connected to the side of the positioning block (142) away from the positioning part (14); Wherein, notch openings two (1551) are formed at both ends of the second limiting plate (155). A second cross plate (1552) is slidably connected to the inside of the notch opening two (1551). In the initial state, the second cross plate (1552) is in contact with the blocking part (159), so that the blocking part (159) is in close contact with the side block (1581), and the rotating shaft (158) is restricted from rotating. A groove (1553) is formed on the side of the second cross plate (1552) close to the resisting frame (156). A second elastic sheet (1554) is elastically connected to the top end of the second cross plate (1552). In the initial state, the second elastic sheet (1554) is in contact with the bottom end of the supporting plate (152). A second main shaft (1555) is fixedly connected to the middle of the second cross plate (1552). The second main shaft (1555) is rotatably connected to the side of the connecting rod (153) away from the positioning plate (145).

2. The bending corner processing device for a flexible printed circuit board according to claim 1, wherein: The positioning block (142) is slidably connected to the inner wall of the positioning part (14). A positioning groove (146) is formed on the side of the positioning plate (145) away from the positioning part (14). A linkage part is arranged inside the positioning groove (146). The other end of the linkage part is connected to the side of the limiting part (15).

3. A bending corner processing device for a flexible printed circuit board according to claim 2, characterized in that: On both sides of the first limiting plate (151), there are first notches (1511). On one side of the bottom end of the first limiting plate (151), there is a bottom groove (1512). On both sides of the first limiting plate (151), there are limiting grooves (154). Inside the limiting grooves (154), there are connecting rods (153). One side of the connecting rod (153) close to the positioning plate (145) is rotatably connected to the inner wall of the limiting groove (154). The other side of the connecting rod (153) away from the positioning plate (145) is slidably connected to the inner wall of the limiting groove (154). The other side of the connecting rod (153) away from the positioning plate (145) is rotatably connected to a first main shaft (1515). Outside the first main shaft (1515), there is a first cross plate (1513). At the top of the first main shaft (1515), there is an elastically connected first elastic piece (1514). In the initial state, the first elastic piece (1514) is inside the first main shaft (1515) on the side close to the positioning member (14).

4. A bending and corner processing device for a flexible printed circuit board according to claim 3, characterized in that: The linkage member includes a tooth shaft (161) rotatably connected inside the positioning groove (146). The tooth shaft (161) penetrates through the first notch (1511). One end of the tooth shaft (161) away from the positioning groove (146) is fixedly connected to a gear (162). The bottom end of the gear (162) penetrates through the bottom groove (1512). The gear (162) is embedded inside the first limiting plate (151). Symmetrically meshed on the outer circumferential surface of the tooth shaft (161) are L-shaped racks (163). The other end of the L-shaped rack (163) is fixedly connected to a positioning rod (164). The other end of the positioning rod (164) is fixedly connected to the side of the second limiting plate (155).

5. A bending corner processing device for a flexible printed circuit board according to claim 1, characterized in that: On the surface of the cover plate (11) at a position away from the center of the circle, there is an annular groove (19). Inside the annular groove (19), there is a fixedly arranged toothed plate (17). At the side of the annular groove (19), there is an inclined groove (18). The positioning member (14) is located above the annular groove (19).

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