An automatic bending device for FPC flexible printed circuit board and its bending method

Abstract

The present invention relates to the technical field of circuit board bending, and discloses an automatic bending device for FPC flexible circuit boards and a bending method thereof, including a rail. A side fixing plate is fixedly connected to the front side surface of the rail, and a material box fixing plate is fixedly connected to the rear side surface of the rail. A flipping assembly is arranged above the rail. The guide rail is fixedly connected to the surface of the rail, and the static sliding bar is fixedly connected to the surface of the guide rail. The flipping tooth groove is opened at the middle position of the surface of the static sliding bar. The sliding rail seat is slidably connected to the outer side surface of the guide rail. The flipping plate is slid away from the folded flexible circuit board through the spline rod and the flipping shaft, simplifying the driving structure steps through the operation linkage of the structure and improving the processing efficiency. At the same time, the spline rod rotates to drive the flipping plate to flip, folding the flexible circuit board in half. This folding method can prevent the protective arc at the bending part from being overly pressed and resulting in circuit breakage.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board bending, and particularly to an automatic bending device for FPC flexible printed circuit boards and a bending method thereof. Background Art

[0002] A flexible printed circuit board is a circuit board using a flexible substrate, mainly composed of conductive copper foil, insulating material and a cover layer. Due to its flexible and thin characteristics, FPCB is often used in applications with limited space or requiring bending, such as mobile phones, cameras and wearable devices. Bending of flexible printed circuit boards requires systematic methods and strict quality control in the design, manufacturing and testing stages to ensure good flexibility and reliability in actual applications.

[0003] The patent with the application number CN202310303798.6 discloses an automatic bending mechanism for FPC flexible printed circuit boards, including: a bending positioning device, including a correction mechanism and a U-shaped folding positioning avoidance mechanism; a 90° folding device, including a folding lower platform mechanism and a flipping lifting mechanism; a 180° folding device, including a lower platform, a winding mechanism, an upper lifting mechanism and a core-pulling pressing mechanism; a 90° U-shaped folding device, including a folding forming mechanism, a triple-fold lifting mechanism and a positioning U-shaped mechanism. It solves the problem that existing FPCs are difficult to bend or prone to rebound after bending during the automatic bending process; realizes the automatic bending of FPC flexible printed circuit boards, without excessive manual participation, can quickly bend the FPC according to actual needs, is not prone to displacement and rebound, and ensures that the shape and size of each FPC are consistent after bending.

[0004] This patent's rapid flipping cannot prevent the problem of excessive pressure on the flipping part of the flexible printed circuit board resulting in breakage. Therefore, it is necessary to design an automatic bending device for FPC flexible printed circuit boards and a bending method that can prevent excessive flipping pressure. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic bending device for FPC flexible printed circuit boards and a bending method thereof to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: An automatic bending device for an FPC flexible circuit board, comprising a rail. A side fixing plate is fixedly connected to the front side surface of the rail, and a material box fixing plate is fixedly connected to the rear side surface of the rail. A flipping assembly is arranged above the rail. The flipping assembly includes a guide rail, a static slide bar, a flipping tooth groove, a slide rail seat, a flipping shaft, a spline rod, a flipping gear, a flipping plate, a driving pull rod, a guiding slide plate, and a guide rod. The guide rail is fixedly connected to the surface of the rail. The static slide bar is fixedly connected to the surface of the guide rail. The flipping tooth groove is opened at the middle position of the surface of the static slide bar. The slide rail seat is slidably connected to the outer side surface of the guide rail. The flipping shaft is rotatably connected to the inner side of the slide rail seat. The spline rod is slidably connected to the inner side of the flipping shaft. The flipping gear is fixedly connected to the outer side surface of the flipping shaft. The flipping plate is fixedly connected to the side surface of the spline rod. The driving pull rod is fixedly connected to the right side surface of the slide rail seat. The guiding slide plate is slidably connected to the side surface of the slide rail seat. The guide rod is fixedly connected to the side surface of the rail. The spline rod is rotatably connected to the guiding slide plate, and the flipping gear is rotatably connected to the slide rail seat. A slide shaft seat is fixedly connected to the right side surface of the rail, and the slide shaft seat is slidably connected to the driving pull rod. During movement, an external hydraulic cylinder is connected to the driving pull rod. The hydraulic cylinder is used to pull the driving pull rod to make the slide rail seat slide along the upper part of the guide rail. At this time, the slide rail seat is on the left static slide bar. The slide rail seat slides along the guide rod through the connected guiding slide plate, so that the guiding slide plate moves forward along with the slide rail seat to push the spline rod and the flipping shaft to slide, thereby enabling the spline rod to push the flipping plate to extend forward and insert under the flexible circuit board. When the slide rail seat moves above the right static slide bar, the flipping gear inside the slide rail seat stops rotating again through the surface fitting with the static slide bar on the right, and slides through the guiding slide plate and the guide rod. The flipping plate is made to slide through the spline rod and the flipping shaft to separate the flipping plate from the folded flexible circuit board. By the operation linkage of the structure, the driving structure steps are simplified and the processing efficiency is improved. At the same time, when the flipping gear inside the slide rail seat moves to the flipping tooth groove on the surface of the guide rail, the side surface of the flipping gear meshes with the flipping tooth groove and drives the flipping shaft and the spline rod to rotate, thereby enabling the spline rod to rotate and drive the flipping plate to flip, folding the flexible circuit board in half. This folding method can prevent the protective arc at the bending part from being over-pressed and resulting in circuit breakage.

[0007] A material pushing structure is provided on the front side of the slide rail seat. The material pushing structure includes a linkage push rod, a retractable slide rod, a stop rod, a flipping push rod, a linkage swing rod, a sliding groove connecting piece, and a support plate. The linkage push rod is fixedly connected to the surface of the slide rail seat. The retractable slide rod is slidably connected to the outer side surface of the linkage push rod. The stop rod is fixedly connected to the surface of the side fixing plate. The flipping push rod is rotatably connected to the upper surface of the side fixing plate. The linkage swing rod is hingedly connected to the surface of the flipping push rod. The sliding groove connecting piece is slidably connected to the surface of the side fixing plate. The support plate is slidably connected to the ground of the side fixing plate. A spring is provided on the outer side surface of the linkage push rod, and both ends of the spring are fixedly connected to the linkage push rod and the retractable slide rod respectively. A torsion spring is provided at the bottom end of the flipping push rod, and both ends of the torsion spring are fixedly connected to the flipping push rod and the surface of the side fixing plate respectively. The sliding groove connecting piece is slidably connected to the linkage swing rod. When the slide rail seat moves to the right, it will drive the connected linkage push rod, so that the linkage push rod provides support for the retractable slide rod through the elastic force of the outer spring, enabling the retractable slide rod to make the flipping push rod flip and drive the torsion spring to flip after touching the flipping push rod. As a result, the bottom end extension structure of the flipping push rod retracts backward until the top structure of the flipping push rod is blocked by the stop rod. When the slide rail seat slides from the right end to the left end of the rail, at this time, the flipping push rod is no longer in contact with the end of the retractable slide rod, allowing the flipping push rod to reset under the action of the torsion spring and push the folded flexible circuit board to the designated position, realizing the function of automatic material discharging. At the same time, when the flipping push rod deflects, it will drive the linkage swing rod to move, and slide through the sliding groove connecting piece sliding on the outer side of the linkage swing rod, so that the sliding groove connecting piece drives the support plate to move under the flexible circuit board, playing a supporting role for the bending of the flexible circuit board.

[0008] The front side of the material box solid plate is provided with an adhesive structure, and the adhesive structure includes a push cylinder rod, a material barrel, a feeding pipe, a push cylinder fixing sheet, an adhesive material box, an oscillation plate, and an oscillation bar. The push cylinder rod is fixedly connected to the side of the linkage push rod, the material barrel is fixedly connected to the right end of the push cylinder rod, the feeding pipe is fixedly connected to the left end of the material barrel, the push rod fixing sheet is fixedly connected to the side of the baffle rod, the adhesive material box is fixedly connected to the front top of the material box solid plate, the oscillation plate is fixedly connected to the side of the linkage push rod, the oscillation bar is fixedly connected to the bottom surface of the adhesive material box, the oscillation bar and the oscillation plate are in contact with each other, the adhesive material box is connected to the material barrel, the material barrel is connected to the feeding pipe, and the feeding The end of the tube extends to the flip plate, and the side of the flip plate is fixedly connected to the coating tube, and the coating tube is connected to the feed tube. At the same time, a small discharge hole is provided on the surface of the coating tube. When the linkage push rod moves, it will drive the push barrel rod to move, and push the barrel to the side of the push rod fixed plate through the push barrel rod, so that the material from the adhesive box entering the barrel is output to the side of the flip plate through the one-way valve and the feed tube in the barrel. By spraying materials, the flexible circuit board is assisted to fit after folding, and the flexible circuit board is prevented from being detached by elasticity after flipping. At the same time, when the linkage push rod moves, it will drive the oscillation plate, so that the oscillation plate moves and contacts with the oscillation bar on the bottom side of the adhesive box, so that the adhesive box vibrates to prevent the adhesive box from being blocked when unloading.

[0009] The right end of the side fixed plate is provided with a feeding structure, and the feeding structure includes a rotating shaft frame, a rotating belt shaft, a transmission belt, a fixed groove bar, a pressure strip, a flexible plate, and an adhesive block. The rotating shaft frame is fixedly connected to the side surface of the side fixed plate, the rotating belt shaft is rotatably connected to the inner side of the rotating shaft frame, the transmission belt is rotatably connected to the outer side of the rotating belt shaft, the fixed groove bar is fixedly connected to the outer surface of the transmission belt, the pressure strip is slidably connected to the inner side of the fixed groove bar, the flexible plate is arranged on the inner side of the pressure strip, the adhesive block is fixedly connected to the surface of the flexible plate, and the The pressing strip is fitted with the outer edge of the flexible board, and the flexible board is located directly below the side fixing plate. When the external motor drives the rotating belt shaft inside the rotating shaft frame to rotate, the rotation of the rotating belt shaft will drive the outer transmission belt to rotate, and the pressing strip will be inserted into the inner side of the fixing groove strip through the fixing groove strip on the side of the transmission belt. The flexible board clamped by the pressing strip will be fixed by the pressing strip passing through the inner side of the fixing groove strip. The smeared material will be applied to the adhesive block. After the flexible board, i.e. the flexible circuit board, is flipped over, the material on the adhesive block will be fitted with the flexible board to achieve fixation.

[0010] A bending method of an FPC flexible circuit board automatic bending device, comprising:

[0011] S1: First, the external hydraulic cylinder is connected to the driving pull rod. The hydraulic cylinder is used to pull the driving pull rod to make the slide rail seat slide along the upper part of the guide rail. At this time, the slide rail seat is on the static slide bar on the left side. The slide rail seat slides along the guide rod through the connected guiding slide plate, so that the guiding slide plate moves forward with the slide rail seat to push the spline rod and the turning shaft to slide, so that the spline rod pushes the turning plate to extend forward and insert under the flexible circuit board;

[0012] S2: Then, when the turning gear on the inner side of the slide rail seat moves to the turning tooth groove on the surface of the guide rail, the side surface of the turning gear meshes with the turning tooth groove and drives the turning shaft and the spline rod to rotate, so that the spline rod rotates to drive the turning plate to turn, and the flexible circuit board is turned and folded in half. This folding method can prevent the protective arc at the bending part from being over-pressed and causing circuit breakage;

[0013] S3: Subsequently, when the slide rail seat moves above the static slide bar at the right end, the turning gear on the inner side of the slide rail seat stops rotating again by fitting with the surface on the static slide bar, and slides through the guiding slide plate and the guide rod. The turning plate slides through the spline rod and the turning shaft to separate the turning plate from the folded flexible circuit board, simplifies the driving structure steps through the structural operation linkage, and improves the processing efficiency;

[0014] S4: After that, let the bottom extension structure of the turning push rod retract backward until the top structure of the turning push rod is blocked by the stop rod. When the slide rail seat slides from the right end to the left end of the rail, at this time, the turning push rod is no longer in contact with the end of the retractable slide rod, and the turning push rod is reset under the action of the torsion spring to push the folded flexible circuit board to the designated position;

[0015] S5: Push the cartridge towards the push rod fixing piece side through the push cylinder rod, so that the material in the adhesive cartridge in the cartridge enters the side surface of the turning plate through the one-way valve and the feeding pipe in the cartridge, and the ejected material assists the flexible circuit board to fit after folding;

[0016] S6: Finally, through the fixing groove on the side surface of the transmission belt, insert the pressing strip into the inner side of the fixing groove, and the flexible board clamped by the pressing strip will be fixed by passing through the inner side of the fixing groove by the pressing strip. The applied material will be applied on the bonding block. After the flexible board, that is, the flexible circuit board, is turned over, the material on the bonding block will be attached to the flexible board to achieve fixation.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] In the present invention, by providing a turning assembly, the turning plate slides through the spline rod and the turning shaft to separate the turning plate from the folded flexible circuit board, simplifies the driving structure steps through the structural operation linkage, and improves the processing efficiency. At the same time, the spline rod rotates to drive the turning plate to turn, and the flexible circuit board is turned and folded in half. This folding method can prevent the protective arc at the bending part from being over-pressed and causing circuit breakage;

[0019] In the present invention, by providing a material pushing structure, the flipping push rod is reset under the action of a torsion spring to push the folded flexible circuit board to a designated position, realizing the function of automatic discharging. At the same time, when the flipping push rod deflects, it drives the linkage swing rod to move, and slides through the sliding groove connecting piece on the outside of the linkage swing rod, so that the sliding groove connecting piece drives the support plate to move under the flexible circuit board, playing a supporting role for the bending of the flexible circuit board;

[0020] In the present invention, by providing an adhesion structure, the ejected material assists the flexible circuit board to fit after being folded, preventing the flexible circuit board from detaching elastically after flipping. At the same time, when the linkage push rod moves, it drives the oscillating plate, and the oscillating plate moves to contact the oscillating strip at the bottom side of the adhesive material tank, so that the adhesive material tank vibrates, preventing the adhesive material in the adhesive material tank from being blocked during feeding;

[0021] In the present invention, by providing a feeding structure, the flexible board clamped by the pressing strip is fixed by passing the pressing strip through the inside of the fixing groove strip, and the applied material is applied on the bonding block. After the flexible board, that is, the flexible circuit board, is flipped, the material on the bonding block fits with the flexible board to achieve fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0023] In the drawings:

[0024] Figure 1 is the overall front three-dimensional structure schematic diagram of the present invention;

[0025] Figure 2 is the overall rear three-dimensional structure schematic diagram of the present invention;

[0026] Figure 3 is the structure schematic diagram of the flipping component of the present invention;

[0027] Figure 4 is the structure schematic diagram of the material pushing structure of the present invention;

[0028] Figure 5 is the structure schematic diagram of the adhesion structure and the feeding structure of the present invention;

[0029] Figure 6 is the present invention Figure 5 the enlarged structure schematic diagram of A in;

[0030] Figure 7 is the present invention Figure 5 the enlarged structure schematic diagram of B in;

[0031] In the figure: 1. Rail; 2. Side fixing plate; 3. Bin fixing plate; 4. Flipping assembly; 41. Guide rail; 42. Static sliding bar; 43. Flipping tooth groove; 44. Slide rail seat; 45. Flipping shaft; 46. Spline rod; 47. Flipping gear; 48. Flipping plate; 49. Driving pull rod; 410. Guide sliding plate; 411. Guide rod; 5. Pushing material structure; 51. Linkage push rod; 52. Contracting sliding rod; 53. Stop rod; 54. Flipping push rod; 55. Linkage swing rod; 56. Sliding groove connecting piece; 57. Support plate; 6. Adhesive structure; 61. Pushing cylinder rod; 62. Cylinder; 63. Feeding pipe; 64. Push rod fixing piece; 65. Adhesive bin; 66. Oscillating plate; 67. Oscillating bar; 8. Loading structure; 81. Rotating shaft frame; 82. Belt rotating shaft; 83. Transmission belt; 84. Fixed groove bar; 85. Pressing strip; 86. Flexible plate; 87. Adhesive block. Detailed implementation manners

[0032] 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 only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-7, an embodiment of the present invention is an automatic bending device for FPC flexible circuit boards, including a rail 1. A side fixing plate 2 is fixedly connected to the front side of the rail 1, and a material box fixing plate 3 is fixedly connected to the rear side of the rail 1. A flipping assembly 4 is arranged above the rail 1. The flipping assembly 4 includes a guide rail 41, a static sliding bar 42, a flipping tooth groove 43, a sliding rail seat 44, a flipping shaft 45, a spline rod 46, a flipping gear 47, a flipping plate 48, a driving pull rod 49, a guiding sliding plate 410, and a guide rod 411. The guide rail 41 is fixedly connected to the surface of the rail 1, the static sliding bar 42 is fixedly connected to the surface of the guide rail 41, the flipping tooth groove 43 is opened at the middle position of the surface of the static sliding bar 42, the sliding rail seat 44 is slidably connected to the outer side of the guide rail 41, the flipping shaft 45 is rotatably connected to the inner side of the sliding rail seat 44, the spline rod 46 is slidably connected to the inner side of the flipping shaft 45, the flipping gear 47 is fixedly connected to the outer side of the flipping shaft 45, the flipping plate 48 is fixedly connected to the side of the spline rod 46, the driving pull rod 49 is fixedly connected to the right side of the sliding rail seat 44, the guiding sliding plate 410 is slidably connected to the side of the sliding rail seat 44, the guide rod 411 is fixedly connected to the side of the rail 1, the spline rod 46 is rotatably connected to the guiding sliding plate 410, the flipping gear 47 is rotatably connected to the sliding rail seat 44. A sliding shaft seat is fixedly connected to the right side of the rail 1, and the sliding shaft seat is slidably connected to the driving pull rod 49. During movement, an external hydraulic cylinder is connected to the driving pull rod 49, and the hydraulic cylinder is used to pull the driving pull rod 49 to make the sliding rail seat 44 slide along the upper part of the guide rail 41. At this time, the sliding rail seat 44 is on the left static sliding bar 42. The sliding rail seat 44 slides along the guide rod 411 through the connected guiding sliding plate 410, so that the guiding sliding plate 410 moves forward along with the sliding rail seat 44 to push the spline rod 46 and the flipping shaft 45 to slide, thereby enabling the spline rod 46 to push the flipping plate 48 to extend forward and insert under the flexible circuit board. When the sliding rail seat 44 moves above the right static sliding bar 42, the flipping gear 47 inside the sliding rail seat 44 stops rotating again by fitting the surface with the static sliding bar 42, and slides through the guiding sliding plate 410 and the guide rod 411. The flipping plate 48 is made to slide through the spline rod 46 and the flipping shaft 45 to separate the flipping plate 48 from the folded flexible circuit board. By the linkage operation of the structure, the driving structure steps are simplified and the processing efficiency is improved. At the same time, when the flipping gear 47 inside the sliding rail seat 44 moves to the flipping tooth groove 43 on the surface of the guide rail 41, the side of the flipping gear 47 meshes with the flipping tooth groove 43 and drives the flipping shaft 45 and the spline rod 46 to rotate, thereby enabling the spline rod 46 to rotate and drive the flipping plate 48 to flip, folding the flexible circuit board in half. This folding method can prevent the protective arc at the bending part from being overly pressed and causing circuit breakage.

[0034] A pusher structure 5 is provided on the front side of the slide rail base 44. The pusher structure 5 includes a linkage push rod 51, a retractable slide rod 52, a stop rod 53, a flipping push rod 54, a linkage swing rod 55, a sliding groove connecting piece 56, and a support plate 57. The linkage push rod 51 is fixedly connected to the surface of the slide rail base 44. The retractable slide rod 52 is slidably connected to the outer side surface of the linkage push rod 51. The stop rod 53 is fixedly connected to the surface of the side fixing plate 2. The flipping push rod 54 is rotatably connected to the upper surface of the side fixing plate 2. The linkage swing rod 55 is hingedly connected to the surface of the flipping push rod 54. The sliding groove connecting piece 56 is slidably connected to the surface of the side fixing plate 2. The support plate 57 is slidably connected to the ground surface of the side fixing plate 2. A spring is provided on the outer side surface of the linkage push rod 51, and the two ends of the spring are respectively fixedly connected to the linkage push rod 51 and the retractable slide rod 52. A torsion spring is provided at the bottom end of the flipping push rod 54, and the two ends of the torsion spring are respectively fixedly connected to the flipping push rod 54 and the surface of the side fixing plate 2. The sliding groove connecting piece 56 is slidably connected to the linkage swing rod 55. When the slide rail base 44 moves to the right, it will drive the connected linkage push rod 51, so that the linkage push rod 51 provides support for the retractable slide rod 52 through the elastic force of the outer spring, enabling the retractable slide rod 52 to flip the flipping push rod 54 after touching it and drive the torsion spring to flip, so that the bottom end extension structure of the flipping push rod 54 retracts backward until the top structure of the flipping push rod 54 is blocked by the stop rod 53. When the slide rail base 44 slides from the right end to the left end of the rail 1, at this time, the flipping push rod 54 is no longer in contact with the end of the retractable slide rod 52, allowing the flipping push rod 54 to reset under the action of the torsion spring and push the folded flexible circuit board to the designated position, realizing the function of automatic discharging. At the same time, when the flipping push rod 54 deflects, it will drive the linkage swing rod 55 to move, and slide through the sliding groove connecting piece 56 sliding on the outer side of the linkage swing rod 55, so that the sliding groove connecting piece 56 drives the support plate 57 to move under the flexible circuit board, playing a supporting role for the bending of the flexible circuit board.

[0035] Working principle: During operation, the external hydraulic cylinder is connected to the driving pull rod 49. The hydraulic cylinder is used to pull the driving pull rod 49 to make the slide rail seat 44 slide along the upper side of the guide rail 41. At this time, the slide rail seat 44 is on the static slide bar 42 on the left side. The slide rail seat 44 slides along the guide rod 411 through the connected guide slide plate 410, so that the guide slide plate 410 moves forward with the slide rail seat 44 to push the spline rod 46 to slide with the turning shaft 45. Thus, the spline rod 46 pushes the turning plate 48 to extend forward and insert into the bottom side of the flexible circuit board. When the slide rail seat 44 moves above the static slide bar 42 at the right end, the turning gear 47 inside the slide rail seat 44 stops rotating again by fitting with the surface of the static slide bar 42, and slides through the guide slide plate 410 and the guide rod 411. The turning plate 48 slides through the spline rod 46 and the turning shaft 45 to separate the turning plate 48 from the folded flexible circuit board. The driving structure steps are simplified through the linkage operation of the structure, and the processing efficiency is improved. At the same time, when the turning gear 47 inside the slide rail seat 44 moves to the turning tooth groove 43 on the surface of the guide rail 41, the side of the turning gear 47 meshes with the turning tooth groove 43 and drives the turning shaft 45 and the spline rod 46 to rotate. Thus, the rotation of the spline rod 46 drives the turning plate 48 to turn, and the flexible circuit board is turned and folded in half. This folding method can prevent the protection arc at the bending part from being over-pressed and causing the circuit to break;

[0036] When the slide rail seat 44 moves to the right, it will drive the connected linkage push rod 51. The linkage push rod 51 provides support for the retractable slide rod 52 through the elastic force of the outer spring, so that the retractable slide rod 52 can make the turning push rod 54 turn and drive the torsion spring to turn after touching the turning push rod 54. Thus, the bottom end extension structure of the turning push rod 54 retracts backward until the top structure of the turning push rod 54 is blocked by the stop rod 53. When the slide rail seat 44 slides from the right end to the left end of the rail 1, at this time, the turning push rod 54 is no longer in contact with the end of the retractable slide rod 52, and the turning push rod 54 is reset under the action of the torsion spring to push the folded flexible circuit board to the designated position, realizing the function of automatic discharging. At the same time, when the turning push rod 54 deflects, it will drive the linkage swing rod 55 to move, and slide through the sliding groove connecting piece 56 sliding outside the linkage swing rod 55. Thus, the sliding groove connecting piece 56 drives the support plate 57 to move under the flexible circuit board to play a supporting role for the bending of the flexible circuit board.

[0037] Please refer to Figures 1-7On the basis of the above embodiment, in another embodiment of the present invention, a bonding structure 6 is provided on the front side of the material box fixed plate 3, and the bonding structure 6 includes a push rod 61, a material barrel 62, a feeding pipe 63, a push rod fixing piece 64, an adhesive material box 65, an oscillation plate 66, and an oscillation bar 67. The push rod 61 is fixedly connected to the side of the linkage push rod 51, the material barrel 62 is fixedly connected to the right end of the push rod 61, the feeding pipe 63 is fixedly connected to the left end of the material barrel 62, the push rod fixing piece 64 is fixedly connected to the side of the blocking rod 53, the adhesive material box 65 is fixedly connected to the front top of the material box fixed plate 3, the oscillation plate 66 is fixedly connected to the side of the linkage push rod 51, the oscillation bar 67 is fixedly connected to the bottom surface of the adhesive material box 65, the oscillation bar 67 and the oscillation plate 66 are in contact with each other, the adhesive material box 65 is connected to the material barrel 62, and the material barrel 62 is connected to the feeding pipe 63. The end of the feed pipe 63 extends to the flip plate 48, and the side of the flip plate 48 is fixedly connected to the coating pipe, and the coating pipe is connected to the feed pipe 63. At the same time, a small discharge hole is provided on the surface of the coating pipe. When the linkage push rod 51 moves, it will drive the push cylinder rod 61 to move, and push the barrel 62 to the side of the push rod fixed plate 64 through the push cylinder rod 61, so that the adhesive box 65 can enter the barrel 62. The material is output to the side of the flip plate 48 through the one-way valve and the feed pipe 63 in the barrel 62, and the flexible circuit board is assisted to fit after folding by spraying materials, so as to prevent the flexible circuit board from being detached by elasticity after flipping. At the same time, when the linkage push rod 51 moves, it will drive the oscillation plate 66, so that the oscillation plate 66 moves and contacts with the oscillation bar 67 on the bottom side of the adhesive box 65, so that the adhesive box 65 vibrates to prevent the adhesive box 65 from being blocked when unloading.

[0038] A feeding structure 8 is provided at the right end of the side fixing plate 2, and the feeding structure 8 includes a rotating shaft frame 81, a rotating belt shaft 82, a transmission belt 83, a fixed groove bar 84, a pressing strip 85, a flexible plate 86, and an adhesive block 87. The rotating shaft frame 81 is fixedly connected to the side of the side fixing plate 2, the rotating belt shaft 82 is rotatably connected to the inner side of the rotating shaft frame 81, the transmission belt 83 is rotatably connected to the outer side of the rotating belt shaft 82, the fixed groove bar 84 is fixedly connected to the outer surface of the transmission belt 83, the pressing strip 85 is slidably connected to the inner side of the fixed groove bar 84, the flexible plate 86 is arranged on the inner side of the pressing strip 85, the adhesive block 87 is fixedly connected to the surface of the flexible plate 86, and the pressing strip 85 is The outer edges of the flexible plate 86 are in contact with each other, and the flexible plate 86 is located directly below the side fixing plate 2. When the external motor drives the rotating belt shaft 82 on the inner side of the rotating shaft frame 81 to rotate, the rotation of the rotating belt shaft 82 will drive the outer transmission belt 83 to rotate, and through the fixed groove bar 84 on the side of the transmission belt 83, the pressing strip 85 is inserted into the inner side of the fixed groove bar 84, and the flexible plate 86 clamped by the pressing strip 85 will be fixed by the pressing strip 85 passing through the inner side of the fixed groove bar 84, and the smeared material will be smeared on the adhesive block 87. After the flexible plate 86, i.e. the flexible circuit board, is flipped over, the material on the adhesive block 87 will be fixed after being fitted with the flexible plate 86.

[0039] Working principle: When the linkage push rod 51 moves, it drives the push cylinder rod 61 to move, and through the push cylinder rod 61, the material cylinder 62 is pushed towards the side of the push rod fixing piece 64, so that the adhesive in the adhesive tank 65 enters the material in the material cylinder 62 and is output to the side of the flip plate 48 through the one-way valve and the feed pipe 63 in the material cylinder 62. By spraying the material, it assists the flexible circuit board to fit after folding, preventing the flexible circuit board from detaching elastically after flipping. At the same time, when the linkage push rod 51 moves, it drives the oscillating plate 66, making the oscillating plate 66 move and contact the oscillating bar 67 at the bottom of the adhesive tank 65, so that the adhesive tank 65 vibrates, preventing the adhesive tank 65 from being blocked when discharging materials;

[0040] When the external motor drives the belt shaft 82 inside the rotating shaft frame 81 to rotate, the rotation of the belt shaft 82 drives the outer transmission belt 83 to rotate, and through the fixing groove strip 84 on the side of the transmission belt 83, the pressing strip 85 is inserted into the inside of the fixing groove strip 84, and the flexible board 86 clamped by the pressing strip 85 will be fixed by passing through the inside of the fixing groove strip 84 through the pressing strip 85. The applied material will be applied on the bonding block 87. After the flexible board 86, that is, the flexible circuit board, is flipped, the material on the bonding block 87 is bonded to the flexible board 86 to achieve fixation.

[0041] A bending method for an automatic bending device of an FPC flexible circuit board, characterized by comprising:

[0042] S1: First, the external hydraulic cylinder is connected to the driving pull rod 49. The hydraulic cylinder is used to pull the driving pull rod 49 to make the slide rail seat 44 slide along the upper side of the guide rail 41. At this time, the slide rail seat 44 is on the static slide bar 42 on the left side. The slide rail seat 44 slides along the guide rod 411 through the connected guiding slide plate 410, so that the guiding slide plate 410 moves forward with the slide rail seat 44 to push the spline rod 46 to slide with the flip shaft 45, so that the spline rod 46 pushes the flip plate 48 to extend forward and insert under the flexible circuit board;

[0043] S2: Then, when the flip gear 47 inside the slide rail seat 44 moves to the flip tooth groove 43 on the surface of the guide rail 41, the side of the flip gear 47 meshes with the flip tooth groove 43 and drives the flip shaft 45 and the spline rod 46 to rotate, so that the spline rod 46 rotates to drive the flip plate 48 to flip, folding the flexible circuit board in half. This folding method can prevent the protective arc at the bending part from being over-pressed and resulting in circuit breakage;

[0044] S3: Subsequently, when the slide rail seat 44 moves above the static slide bar 42 at the right end, the flip gear 47 inside the slide rail seat 44 stops rotating again by fitting with the surface of the static slide bar 42, and slides through the guiding slide plate 410 and the guide rod 411. The flip plate 48 is made to slide with the flip shaft 45 through the spline rod 46 to separate the flip plate 48 from the folded flexible circuit board, simplifying the driving structure steps through the operation linkage of the structure and improving the processing efficiency;

[0045] S4: After that, let the rear-end extension structure of the flipping push rod 54 retract backward after flipping until the top structure of the flipping push rod 54 is blocked by the blocking rod 53. When the slide rail seat 44 slides from the right end to the left end of the rail 1, at this time, the flipping push rod 54 is no longer contacted by the end of the retracting slide rod 52. Let the flipping push rod 54 reset under the action of the torsion spring to push the folded flexible circuit board to the designated position;

[0046] S5: Push the cartridge 62 towards the side of the push rod fixing piece 64 through the push cylinder rod 61, so that the material in the adhesive cartridge 65 in the cartridge 62 is output to the side of the flipping plate 48 through the one-way valve and the feeding pipe 63 in the cartridge 62, and the ejected material assists the flexible circuit board to fit after folding;

[0047] S6: Finally, through the fixing groove strip 84 on the side of the transmission belt 83, insert the pressing strip 85 into the inner side of the fixing groove strip 84, and the flexible plate 86 clamped by the pressing strip 85 will be fixed by passing through the inner side of the fixing groove strip 84 through the pressing strip 85. The applied material will be applied on the bonding block 87. After the flexible plate 86, i.e., the flexible circuit board, is flipped, the material on the bonding block 87 will be bonded to the flexible plate 86 to achieve fixation.

[0048] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0049] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic bending device for flexible printed circuit boards, comprising a rail (1), characterized in that: The front side of the side of the rail (1) is fixedly connected to a side fixing plate (2), the rear side of the rail (1) is fixedly connected to a material box fixing plate (3), and a flip assembly (4) is arranged above the rail (1), and the flip assembly (4) comprises a guide rail (41), a stationary slide bar (42), a flip tooth groove (43), a slide rail seat (44), a flip shaft (45), a spline rod (46), a flip gear (47), a flip plate (48), a driving pull rod (49), a guide slide plate (410), and a guide rod (411), wherein the guide rail (41) is fixedly connected to the surface of the rail (1), the stationary slide bar (42) is fixedly connected to the surface of the guide rail (41), and the flip tooth groove (43) is opened in the middle position of the surface of the stationary slide (42), the slide rail seat (44) is slidably connected to the outer side of the guide rail (41), the flip shaft (45) is rotatably connected to the inner side of the slide rail seat (44), the spline rod (46) is slidably connected to the inner side of the flip shaft (45), the flip gear (47) is fixedly connected to the outer side of the flip shaft (45), the flip plate (48) is fixedly connected to the side of the spline rod (46), the drive pull rod (49) is fixedly connected to the right side of the slide rail seat (44), the guide slide plate (410) is slidably connected to the side of the slide rail seat (44), and the guide rod (411) is fixedly connected to the side of the rail (1).

2. The FPC flexible circuit board automatic bending device according to claim 1, characterized in that: The spline rod (46) is rotationally connected to the guide slide plate (410), the flip gear (47) is rotationally connected to the slide rail seat (44), the right side surface of the rail (1) is fixedly connected to a slide shaft seat, and the slide shaft seat is slidably connected to the driving pull rod (49).

3. The FPC flexible circuit board automatic bending device according to claim 2, characterized in that: A material pushing structure (5) is arranged at the front side of the slide rail seat (44), and the material pushing structure (5) comprises a linkage push rod (51), a retractable slide rod (52), a stop rod (53), a flip push rod (54), a linkage swing rod (55), a sliding groove connecting piece (56), and a support plate (57). The linkage push rod (51) is fixedly connected to the surface of the slide rail seat (44), the retractable slide rod (52) is slidably connected to the outer side surface of the linkage push rod (51), the stop rod (53) is fixedly connected to the surface of the side fixing plate (2), the flip push rod (54) is rotatably connected to the upper surface of the side fixing plate (2), the linkage swing rod (55) is hingedly connected to the surface of the flip push rod (54), the sliding groove connecting piece (56) is slidably connected to the surface of the side fixing plate (2), and the support plate (57) is slidably connected to the ground of the side fixing plate (2).

4. The FPC flexible circuit board automatic bending device according to claim 3, characterized in that: A spring is disposed on the outer side surface of the linkage push rod (51), and the two ends of the spring are respectively fixedly connected to the linkage push rod (51) and the retractable slide rod (52); a torsion spring is disposed at the bottom end of the flip push rod (54), and the two ends of the torsion spring are respectively fixedly connected to the flip push rod (54) and the surface of the side fixing plate (2); the sliding groove connecting piece (56) is slidably connected to the linkage swing rod (55).

5. The FPC flexible circuit board automatic bending device according to claim 4, characterized in that: The front side of the material box fixing plate (3) is provided with an adhesive structure (6), and the adhesive structure (6) includes a push rod (61), a material barrel (62), a feed pipe (63), a push rod fixing plate (64), an adhesive material box (65), an oscillation plate (66), and an oscillation bar (67). The push rod (61) is fixedly connected to the side of the linkage push rod (51), the material barrel (62) is fixedly connected to the right end of the push rod (61), the feed pipe (63) is fixedly connected to the left end of the material barrel (62), the push rod fixing plate (64) is fixedly connected to the side of the blocking rod (53), the adhesive material box (65) is fixedly connected to the front top of the material box fixing plate (3), the oscillation plate (66) is fixedly connected to the side of the linkage push rod (51), and the oscillation bar (67) is fixedly connected to the bottom surface of the adhesive material box (65).

6. The FPC flexible circuit board automatic bending device according to claim 5, characterized in that: The oscillation bar (67) and the oscillation plate (66) are in contact with each other, the adhesive material box (65) is connected to the barrel (62), the barrel (62) is connected to the feed pipe (63), the end of the feed pipe (63) extends to the flip plate (48), and the side of the flip plate (48) is fixedly connected to the coating pipe, and the coating pipe is connected to the feed pipe (63), and a discharge hole is provided on the surface of the coating pipe.

7. The FPC flexible circuit board automatic bending device according to claim 6, characterized in that: A feeding structure (8) is provided at the right end of the side fixing plate (2), and the feeding structure (8) comprises a rotating shaft frame (81), a rotating belt shaft (82), a transmission belt (83), a fixed groove bar (84), a pressing strip (85), a flexible plate (86), and an adhesive block (87). The rotating shaft frame (81) is fixedly connected to the side surface of the side fixing plate (2), the rotating belt shaft (82) is rotatably connected to the inner side of the rotating shaft frame (81), the transmission belt (83) is rotatably connected to the outer side of the rotating belt shaft (82), the fixed groove bar (84) is fixedly connected to the outer surface of the transmission belt (83), the pressing strip (85) is slidably connected to the inner side of the fixed groove bar (84), the flexible plate (86) is arranged on the inner side of the pressing strip (85), and the adhesive block (87) is fixedly connected to the surface of the flexible plate (86).

8. The FPC flexible circuit board automatic bending device according to claim 7, characterized in that: The pressing strip (85) is in contact with the outer edge of the flexible plate (86), and the flexible plate (86) is located directly below the side fixing plate (2).

9. A method for bending a FPC flexible circuit board, characterized in that: The FPC flexible circuit board automatic bending device as claimed in claim 8 is used to complete the process. The following steps are involved: S1: First, an external hydraulic cylinder is connected to a driving rod (49), and the driving rod (49) is pulled by the hydraulic cylinder to make the slide rail seat (44) slide along the top of the guide rail (41). At this time, the slide rail seat (44) is on the static slide bar (42) on the left side, and the slide rail seat (44) slides along the guide rod (411) through the connected guide slide plate (410), so that the guide slide plate (410) moves with the slide rail seat (44) and extends forward to push the spline rod (46) and the flip shaft (45) to slide, so that the spline rod (46) pushes the flip plate (48) to extend forward and insert into the bottom side of the flexible circuit board; S2: Then, when the flip gear (47) on the inner side of the slide rail seat (44) moves to the flip tooth groove (43) on the surface of the guide rail (41), the side of the flip gear (47) meshes with the flip tooth groove (43) and drives the flip shaft (45) and the spline rod (46) to rotate, so that the spline rod (46) rotates to drive the flip plate (48) to flip, and the flexible circuit board is flipped and folded in half. This folding method can prevent the protective arc at the bend from being over-pressed and causing the circuit to break; S3: Subsequently, when the slide rail seat (44) moves to above the stationary slide bar (42) at the right end, the flip gear (47) inside the slide rail seat (44) stops rotating again by contacting the surface with the stationary slide bar (42), and slides through the guide slide plate (410) and the guide rod (411), sliding the flip plate (48) through the spline rod (46) and the flip shaft (45) to allow the flip plate (48) to be separated from the folded flexible circuit board, thereby simplifying the driving structure steps through the structural operation linkage and improving the processing efficiency; S4: After that, the bottom extension structure of the flip push rod (54) is retracted backward after flipping, until the top structure of the flip push rod (54) is blocked by the blocking rod (53). When the slide rail seat (44) slides from the right end to the left end of the rail (1), the flip push rod (54) is no longer contacted by the end of the retractable slide rod (52). The flip push rod (54) is reset under the action of the torsion spring to push the folded flexible circuit board to the specified position. S5: The barrel (62) is pushed toward the side of the push rod fixing plate (64) by the barrel pushing rod (61), so that the material from the adhesive material box (65) entering the barrel (62) is output to the side of the flip plate (48) through the one-way valve and the feed pipe (63) in the barrel (62), and the flexible circuit board is assisted to be attached after being folded by spraying the material; S6: Finally, the pressing strip (85) is inserted into the inner side of the fixing strip (84) through the fixing strip (84) on the side of the transmission belt (83), and the flexible board (86) clamped by the pressing strip (85) is fixed by the pressing strip (85) passing through the inner side of the fixing strip (84), and the smeared material is smeared on the adhesive block (87). After the flexible board (86), i.e. the flexible circuit board, is turned over, the material on the adhesive block (87) is attached to the flexible board (86) to achieve fixation.

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