A flexible circuit board flattening tool

Abstract

The present invention discloses a flattening tool for a flexible circuit board, which includes a base, an upper cover, an insulating block, a middle support, and a heating block. The same ends of the upper cover and the middle support are hinged to one end of the base. The middle support is located between the base and the upper cover. The heating block is arranged at the other end of the middle support. The insulating block is correspondingly arranged at the lower part of the other end of the upper cover corresponding to the heating block. A first spring is arranged between the upper cover and the middle support, and a second spring is arranged between the middle support and the base. The insulating material and the heating block are used to compact the part of the FPC to be flattened. At the same time, the connecting rod drives the micro switch downward, and the heating device starts to work, so as to combine hot pressing and flattening. While reducing the process, it avoids the risk of high-temperature scalding after the FPC is hot-pressed, and significantly improves the flattening effect of the FPC. Its flattening operation is simple and the flattening effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible circuit board production, and particularly to a flattening tool for flexible circuit boards. Background Art

[0002] A flexible printed circuit (FPC for short) is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as the base material. It has the characteristics of high wiring density, light weight, thin thickness, and good bendability. Therefore, during the processing or transportation process, it is extremely easy to warp due to external forces. With the improvement of automation, the current Bonding process mainly relies on fully automatic FOG for production. Due to the warping phenomenon of FPCs, if directly loaded, it will cause incomplete adsorption of the FPC by the pre-pressing head, resulting in machine alarms. Usually, before loading, splint hot pressing treatment is used, and then the method of flattening with both hands is used to solve such problems.

[0003] The existing solution for FPC warping is to first use a splint for hot pressing treatment to reduce the toughness of the FPC and make it easier to shape, and then cooperate with both hands for flattening operation. This method, on the one hand, is inconvenient to move due to the large space occupied by the splint itself. On the other hand, after hot pressing the FPC with the splint, the surface temperature of the FPC is still relatively high. Immediately using both hands to flatten it may cause burns to the skin. If waiting for the FPC temperature to drop, it will be difficult to flatten due to the recovery of the FPC toughness. In addition, touching the FPC with both hands may cause contamination of the connection area and affect the subsequent main pressing. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a flattening tool for flexible circuit boards, which has a simple flattening operation and good flattening effect.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] The flattening tool for flexible circuit boards includes a base, an upper cover, an insulating block, a middle support, and a heating block. The same ends of the upper cover and the middle support are hinged to one end of the base. The middle support is located between the base and the upper cover. The heating block is provided at the other end of the middle support. The insulating block is correspondingly provided under the other end of the upper cover corresponding to the heating block. A first spring is provided between the upper cover and the middle support, and a second spring is provided between the middle support and the base.

[0007] Further, a protruding connecting member is provided at one end of the base, and one ends of the upper cover and the middle support are hinged to the connecting member through a rotating shaft.

[0008] A foam block is correspondingly provided at the other end of the base corresponding to the other end of the middle support, and the lower surface of the other end of the middle support is a plane.

[0009] A chute is provided on the middle support, and a slider is provided on the chute. The upper end of the first spring is connected to the upper cover, and the lower end of the first spring is connected to the slider.

[0010] A horizontal plate is provided at the lower part of the middle support, and a support plate is provided on the base directly below the horizontal plate. The second spring is provided between the horizontal plate and the support plate.

[0011] The other end of the base is provided with a boss, the boss is located directly below the heating block, an installation groove is provided on the boss, and the foam block is arranged in the installation groove.

[0012] The slider is provided with a groove corresponding to the hinged end of the middle support, and a hook for connecting with the lower end of the first spring is arranged in the groove.

[0013] A stop block is provided at the end of the middle support away from the hinged end of the middle support. The distance from the end of the chute away from the hinged end of the middle support to the stop block is equal to the length of the heating block.

[0014] A connecting rod is provided at the lower part of the horizontal plate, a hole for the lower end of the connecting rod to pass through is provided on the support plate, a microswitch for controlling the operation of the heating block is provided below the support plate, and a driving rod for touching the microswitch is hinged at the lower end of the connecting rod.

[0015] It further includes a plug for connecting with an external power supply, and a manual control switch is arranged on the power line between the plug and the microswitch.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The structure of the flattening tool for flexible circuit boards is reasonably designed. By using an external force, both the upper cover and the middle support rotate towards the base direction, realizing that the insulating material and the heating block compact the part of the FPC to be flattened. At the same time, the connecting rod drives the microswitch downward, and the heating device starts to work, thus combining hot pressing and flattening together. While reducing the process, it avoids the risk of high-temperature scalding after the FPC is hot-pressed, and significantly improves the flattening effect of the FPC; under the drive of an external force, the CR foam and the bottom end of the middle support clamp the part of the FPC to be wiped, and the wiping function is realized through the relative movement of the FPC and the flattening tool, avoiding direct contact between the hand and the FPC, thereby avoiding contaminating the circuit board; its flattening operation is simple and the flattening effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0019] Figure 1 It is a schematic structural diagram of the tool of the present invention.

[0020] Figure 2 It is a schematic structural diagram of the slider of the present invention.

[0021] Figure 3 This is a schematic diagram of the local circuit of the present invention.

[0022] In the figure:

[0023] 1. Upper cover; 2. Bracket; 3. Heat insulation block; 4. First spring; 5. Heating block; 6. Stop block; 7. Slide block; 8. Limit hole; 9. Hook; 10. Middle support; 11. Foam block; 12. Base; 13. Terminal block; 14. Microswitch; 15. Driving rod; 16. Single-pole single-throw switch; 17. Plug; 18. Support plate; 19. Second spring; 20. Connecting piece; 21. Connecting rod; 22. Cross plate; 23. Rotating shaft, 24. Chute; 25. Pushing plate. Detailed implementation manners

[0024] The following further describes in detail the specific implementation manners of the present invention by describing the embodiments with reference to the accompanying drawings.

[0025] As Figures 1 to 3 shown, the flexible circuit board flattening tool includes a base, the upper cover, an insulating block, a middle support, and a heating block. The same ends of the upper cover and the middle support are hinged to one end of the base. The middle support is located between the base and the upper cover. The heating block is provided at the other end of the middle support. The insulating block is provided corresponding to the heating block at the lower part of the other end of the upper cover. A first spring is provided between the upper cover and the middle support, and a second spring is provided between the middle support and the base.

[0026] A protruding connecting piece is provided at one end of the base. One ends of the upper cover and the middle support are hinged to the connecting piece through a rotating shaft. A foam block is provided corresponding to the other end of the middle support at the other end of the base. The lower surface of the other end of the middle support is flat; preferably, a convex platform is provided at the other end of the base. The convex platform is located directly below the heating block. An installation groove is provided on the convex platform, and the foam block is provided in the installation groove.

[0027] A chute is provided on the middle support, and a slide block is provided on the chute. The upper end of the first spring is connected to the upper cover, and the lower end of the first spring is connected to the slide block. The slide block is provided with a groove corresponding to the hinged end of the middle support, and a hook for connecting with the lower end of the first spring is provided in the groove. A stop block is provided at the end of the middle support far from the hinged end of the middle support. The distance from the end of the chute far from the hinged end of the middle support to the stop block is equal to the length of the heating block.

[0028] A cross plate is provided at the lower part of the middle support, and a support plate is provided on the base directly below the cross plate. The second spring is provided between the cross plate and the support plate. A connecting rod is provided at the lower part of the cross plate, and a hole for the lower end of the connecting rod to pass through is provided on the support plate. A microswitch for controlling the operation of the heating block is provided below the support plate, and a driving rod for touching the microswitch is hinged at the lower end of the connecting rod.

[0029] The tool further includes a plug for connecting to an external power supply, and a manual control switch is provided on the power line between the plug and the microswitch for easy control.

[0030] The flexible circuit board flattening tool has a reasonable structural design. By using an external force, both the upper cover and the middle support rotate towards the base direction, enabling the insulating material and the heating block to compact the part of the FPC to be flattened. At the same time, the connecting rod drives the microswitch downward, and the heating device starts to work, thus combining hot pressing and flattening. While reducing the process, it avoids the risk of high-temperature scalding after the FPC is hot pressed and significantly improves the flattening effect of the FPC. Driven by an external force, the CR foam and the bottom end of the middle support clamp the part of the FPC to be wiped, and the wiping function is realized through the relative movement between the FPC and this flattening tool, avoiding direct contact between the hand and the FPC, thereby avoiding contaminating the circuit board. Its flattening operation is simple and the flattening effect is good.

[0031] The preferred specific example is as follows:

[0032] The FPC flattening tool includes a heating block 5, a base 12, a microswitch 14, a second spring 19, and a rotating shaft 23. A wiring terminal 13 is installed at the central position of the bottom end inside the base 12, and a single-pole single-throw switch 16 is installed at one end of the bottom end inside the base 12. A microswitch 14 is installed at the bottom end inside the base 12 on one side of the single-pole single-throw switch 16, and a driving rod 15 is provided at the top of the microswitch 14. A connecting member 20 is installed at one end of the top of the base 12, and a support plate 18 is installed at the top of the base (12) at the bottom end of the connecting member 20. A foam block 11 is fixed at one end of the top of the base 12 away from the connecting member 20, and a rotating shaft 23 parallel and perpendicular to both sides of the connecting member 20 is installed at the top of the connecting member 20. The connecting member 20 installs a middle support 10 and an upper cover 1 through the rotating shaft 23. A cross plate 22 is fixed at one end of the bottom end of the middle support 10, and a second spring 19 is vertically installed at the top of the support plate 18 at the bottom of the cross plate. A connecting rod 21 vertically installed at the central position of the bottom end of the cross plate 22 penetrates through the support plate 18 and the top of the base 12, and a driving rod 15 is hinged at the bottom end of the connecting rod 21. A stop block 6 is provided at one end of the top of the middle support 10 away from the rotating shaft 23, and a heating block 5 is installed at the top of the middle support on one side of the stop block. Two sliding grooves 24 are horizontally opened on both sides of the middle support 10 on one side of the heating block, and a push plate is installed through a slider 7 matching with the sliding grooves 24. A groove is opened at the bottom end of the side of the push plate facing the rotating shaft 23, and a hook 9 is installed at the central position of the side of the groove facing the rotating shaft 23. An insulating block 3 is installed at the bottom end of one end of the upper cover 1 away from the rotating shaft 23, and a bracket 2 is installed at the top end inside the upper cover 1. The plug 17 is electrically connected to the wiring terminal 13, the microswitch 14, the single-pole single-throw switch 16, and the heating block 5 through a wire.

[0033] The push plate forms a sliding structure with the slider 7 through the sliding groove 24, and the distance from the end of the sliding groove 24 away from the rotating shaft 23 to the stop block 6 is equal to the length of the heating device 5. The heating block is clamped by the slider and the stop block.

[0034] The upper cover 1, the middle support 10, and the base 12 form a rotating mechanism through the rotating shaft 23, and the rotations between the upper cover, the middle support, and the base do not affect each other.

[0035] The axis of the second spring 19 coincides with the axis of the connecting rod 21, and the length of the second spring 19 is equal to the vertical distance from the support plate 18 to the cross plate 22. A first spring 4 is fixed to the bottom end of one end of the bracket 2, and the first spring 4 is connected to the hook 9 on the side of the groove through the limit hole 8 at the top of the push plate. Moreover, the diameter of the first spring 4 is equal to the height of the groove of the push plate, and the axis of the part of the first spring 4 inside the groove is always parallel to the axis of the middle support 10.

[0036] A hole is provided on the side of the base 12 near the single-pole single-throw switch 16, and the blade of the single-pole single-throw switch 16 penetrates through the side of the base 12 through the hole.

[0037] When using this FPC flattening tool, insert the heating block 5 into the power supply socket at the bottom of the middle support 10 in a manner that closely adheres to the stop block 6. Apply an external force to press the upper cover 1 so that it rotates around the rotating shaft 23 towards the middle support 10. The first spring 4 contracts with the movement of the upper cover 1 to generate elastic force, which is connected to the hook 9 through the limiting hole 8, converting the direction of the elastic force into a direction parallel to the axis of the middle support 10. Under the action of the elastic force generated by the first spring 4, the push plate moves towards the stop block 6 side through the cooperation of the slider 7 in the chute 24. When the slider 6 moves to the leftmost end of the chute 24, the distance between the slider and the stop block 6 is exactly equal to the length of the heating block 5, thereby fixing the heating block 5 under the combined action of the slider and the stop block 6. Replace the foam block as needed, and use a dropper to suck a little alcohol and inject it into it. The plug 17 is externally connected to a power supply to supply power to the device. Turn the single-pole single-throw switch 16 to the closed position, place the FPC part to be flattened between the heating block 5 and the heat insulation block 3, apply an external force to press the upper cover 1 so that it continues to move towards the middle support 10 until the heat insulation block 3 contacts the heating block 5. Continue to apply an external force to the upper cover 1, and the middle support 10 will rotate towards the base 12 together with the upper cover 1 under the action of the upper cover 1 until the bottom end of the middle support 10 contacts the base 12. At this time, due to the rotation of the middle support 10, the second spring 19 is compressed to generate tension, and the connecting rod 21 moves downward to push the driving rod 15, causing the microswitch 14 to conduct, and the heating block 5 works normally. The FPC is reshaped through relative movement with this flattening tool in the hot pressing state, thus combining hot pressing and flattening, reducing the process while avoiding the risk of high-temperature scalding after FPC hot pressing, and significantly improving the FPC flattening effect. Gradually remove the external force acting on the upper cover 1, and the middle support 10 rotates away from the base 12 together with the upper cover 1 under the tension of the second spring 19. The connecting rod 21 moves upward at the same time and pulls up the driving rod 15, the microswitch disconnects, and the heating block 5 stops working. Wait for the middle support 10 and the upper cover 1 to return to the initial position, take out the flattened FPC, turn off the single-pole single-throw switch, then place the FPC part to be wiped above the foam block, apply an external force to the upper cover 1 through the above method, so that the FPC is clamped by the foam block and the bottom end of the middle support 10, and move the FPC for wiping. After wiping, gradually remove the external force acting on the upper cover 1. Wait for the middle support 10 and the upper cover 1 to return to the initial position, take out the wiped FPC and place it in the corresponding position, and repeat the above operations to continue working on the next FPC.

[0038] The above is only an illustration of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiment schemes of the present invention.

[0039] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A flattening tool for flexible circuit boards, comprising a base, characterized in that: An upper cover, an insulating block, a middle support, and a heating block. One end of the upper cover and the middle support are both hinged to one end of the base. The middle support is located between the base and the upper cover. The heating block is provided at the other end of the middle support. The insulating block is provided corresponding to the heating block at the lower part of the other end of the upper cover. A first spring is provided between the upper cover and the middle support. A second spring is provided between the middle support and the base; A protruding connecting member is provided at one end of the base. One end of the upper cover and the middle support are hinged to the connecting member through a rotating shaft. A sliding groove is provided on the middle support, and a sliding block is provided on the sliding groove. The upper end of the first spring is connected to the upper cover, and the lower end of the first spring is connected to the sliding block.

2. The flattening tool for flexible circuit boards according to claim 1, characterized in that: A foam block is provided corresponding to the other end of the middle support at the other end of the base. The lower surface of the other end of the middle support is a plane.

3. The flattening tool for flexible circuit boards according to claim 1, characterized in that: A horizontal plate is provided at the lower part of the middle support. A support plate is provided on the base directly below the horizontal plate. The second spring is provided between the horizontal plate and the support plate.

4. The flattening tool for flexible circuit boards according to claim 2, characterized in that: A boss is provided at the other end of the base. The boss is located directly below the heating block. An installation groove is provided on the boss, and the foam block is provided in the installation groove.

5. The flattening tool for flexible circuit boards according to claim 1, characterized in that: The sliding block is provided with a groove corresponding to the hinged end of the middle support, and a hook for connecting with the lower end of the first spring is provided in the groove.

6. The flattening tool for flexible circuit boards according to claim 1, characterized in that: A stop block is provided at the end of the middle support far from the hinged end of the middle support. The distance from the end of the sliding groove far from the hinged end of the middle support to the stop block is equal to the length of the heating block.

7. The flattening tool for flexible circuit boards according to claim 3, characterized in that: A connecting rod is provided at the lower part of the horizontal plate. A hole for the lower end of the connecting rod to pass through is provided on the support plate. A microswitch for controlling the operation of the heating block is provided below the support plate. The lower end of the connecting rod is hinged with a driving rod for touching the microswitch.

8. The flattening tool for flexible circuit boards according to claim 7, characterized in that: It further includes a plug for connecting with an external power supply. A manual control switch is provided on the power line between the plug and the microswitch.

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