A flexible circuit board bending device

Abstract

The present invention discloses a flexible circuit board bending device, comprising an adsorption jig carrier, a screen material jig carrier, a bending adjustment stepper motor assembly, a bending main drive, a bending angle adjustment drive assembly and a bending axis adjustment drive assembly. The adsorption jig carrier is arranged on the bending adjustment stepper motor assembly, the screen material jig carrier is located below the adsorption jig carrier, the bending main drive is connected to the bending adjustment stepper motor assembly, the bending adjustment stepper motor assembly is arranged on the bending axis adjustment drive assembly, the bending axis adjustment drive assembly is arranged on the bending angle adjustment drive assembly, the screen material jig carrier is flipped, the adsorption jig carrier adsorbs the FPC, the bending adjustment stepper motor assembly adjusts the center position of the FPC, the bending axis adjustment drive assembly performs axis alignment adjustment on the FPC, the bending main drive bends the FPC, stably obtains the required position accuracy of the bending center and the position accuracy of the FPC relative to the screen after bending, thereby improving the accuracy and efficiency of the FPC bending process.

Description

Technical Field

[0001] The present invention relates to the field of precision manufacturing machinery, and in particular to a flexible circuit board bending device. Background Art

[0002] With the development of technology, there are more and more curved screen mobile phones, bracelets and other similar products. The current structural space of mobile phones or wearable products is very limited. Therefore, the bending process of products such as curved mobile phones or bracelets is an inevitable process flow before product assembly in order to optimize wiring and increase assembly density.

[0003] The bending process of curved mobile phones, bracelets and other products involves the bending process of flexible circuit boards (FPCs). When the FPC is bent, the stress types on both sides of its center line are different. The inside is pressure and the outside is tension. The stress magnitude is related to the FPC thickness, bending radius and bending motion trajectory. The common bending mechanisms currently available in the industry are all for flat or two-sided curved products. Such products have no curved glass hard screen (CG) blocking the bending rotation center, so the bending difficulty is small and the bending process is easy to implement. The existing common FPC bending machine mechanism, from the alignment The methods can be divided into FPC alignment and screen alignment. In the FPC alignment method, when the FPC is fixed by vacuum adsorption, the alignment movement of the screen will affect the position of the FPC, resulting in reduced bending accuracy; in the screen alignment method, when the screen is fixed by vacuum adsorption during the bending process, the FPC moves for alignment. Because the distance between the product movement center and the adjustment center of the mechanism is too far, the alignment accuracy is low and the motion control is complex. The above two alignment methods make the mechanism too complicated and difficult to control when dealing with four-sided curved photography, there are problems such as high bending error rate, low bending accuracy and low bending efficiency.

[0004] Therefore, how to improve the accuracy and efficiency of the flexible circuit board bending process is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a flexible circuit board bending device, which can stably obtain the required position accuracy of the bending center and the position accuracy of the FPC relative to the screen after bending through separate control of the FPC bending center and the screen body, thereby greatly improving the accuracy and efficiency of the flexible circuit board bending process.

[0006] In order to solve the above technical problems, the present invention provides a flexible circuit board bending device, including an adsorption jig carrier, a screen material jig carrier, a bending adjustment stepper motor assembly, a bending main drive, a bending angle adjustment drive assembly and a bending axis adjustment drive assembly. The adsorption jig carrier is slidably set on the bending adjustment stepper motor assembly, the screen material jig carrier is located below the adsorption jig carrier and is used to place products, the bending main drive is connected to the bending adjustment stepper motor assembly, the bending adjustment stepper motor assembly is slidably set on the bending axis adjustment drive assembly, and the bending axis adjustment drive assembly is slidably set on the bending angle adjustment drive assembly.

[0007] Preferably, an alignment platform is provided below the screen material feed fixture carrier, and a leveling rubber pad is also provided below the alignment platform.

[0008] Preferably, it also includes a loading and unloading screw module for slidingly connecting the screen material fixture carrier.

[0009] Preferably, it also includes a first linked screw module for connecting to the bending main drive.

[0010] Preferably, it also includes a second linkage screw module for slidingly connecting the bending axis adjustment drive assembly, and the second linkage screw module is connected to the bending angle adjustment drive assembly.

[0011] Preferably, it also includes a photographing drive mechanism arranged on the outside of the screen material fixture carrier.

[0012] Preferably, the photographing drive mechanism includes a synchronous belt, a planetary reducer and a drive motor, one end of the planetary reducer is connected to the drive motor, the synchronous belt is transmission-connected to the other end of the planetary reducer, and the synchronous belt is meshed with the pulley on the outside of the screen material feed fixture carrier.

[0013] Preferably, it also includes a bending adjustment auxiliary mechanism connected to the bending angle adjustment drive assembly.

[0014] Preferably, the bending angle adjustment drive assembly includes a bending angle adjustment servo motor, a reducer, a coupling, a ball screw and a roller slider. The reducer is connected to the bending angle adjustment servo motor, the coupling is connected to the reducer, the ball screw is connected to the coupling, and the movable nut of the ball screw is slidably connected to the roller slider.

[0015] Preferably, the bending adjustment stepper motor assembly is provided with an adjustment mechanism and a bending pre-pressing block, the bending pre-pressing block is installed on the side of the adjustment mechanism, and the adsorption fixture carrier is arranged in the adjustment mechanism.

[0016] Preferably, the adjustment mechanism includes a precision angular contact bearing, a precision thrust bearing, a precision deep groove ball bearing and a synchronous wheel, and the precision angular contact bearing, the precision thrust bearing, the precision deep groove ball bearing and the synchronous wheel are all connected to the adsorption fixture carrier.

[0017] Preferably, the output end of the bending main drive is further provided with a hollow platform, and the bending adjustment stepper motor assembly is installed on the side of the hollow platform.

[0018] The flexible circuit board bending equipment provided by the present invention includes an adsorption jig carrier, a screen material jig carrier, a bending adjustment stepper motor assembly, a bending main drive, a bending angle adjustment drive assembly and a bending axis adjustment drive assembly. The adsorption jig carrier is slidably arranged on the bending adjustment stepper motor assembly. The screen material jig carrier is located below the adsorption jig carrier and is used to place products. The bending main drive is connected to the bending adjustment stepper motor assembly. The bending adjustment stepper motor assembly is slidably arranged on the bending axis adjustment drive assembly. The bending axis adjustment drive assembly is slidably arranged on the bending angle adjustment drive assembly. The product material is placed on the screen material jig carrier. At this time, the adsorption jig carrier stops in the standby position according to the characteristics of the product, that is, it holds the appropriate position of the product FPC, and the adsorption jig carrier is placed on the screen material jig carrier. The vacuum stage is turned on, the screen material jig carrier is flipped to the appropriate angle, the adsorption jig carrier vacuum adsorbs the FPC, the screen material jig carrier returns to the initial position, the bending adjustment stepper motor assembly adjusts the center position of the FPC bending R angle to make the center position accurate when the FPC is bent, the bending axis adjustment drive assembly adjusts the θ axis when the FPC is bent to make the FPC and the screen body accurately aligned, the bending main drive is linked with the pre-set motion trajectory, and the bending linkage continues until the FPC is completely bent. Through the split control of the FPC bending center alignment and the screen body alignment, the required position accuracy of the bending center and the position accuracy of the FPC relative to the screen after bending are stably obtained, which greatly improves the accuracy and efficiency of the flexible circuit board bending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the overall structure of a specific embodiment provided by the present invention;

[0021] Figure 2 for Figure 1 The schematic diagram of the screen material fixture carrier structure shown;

[0022] Figure 3 for Figure 1 Another angle view of the structure shown;

[0023] Figure 4 for Figure 3 The schematic diagram of the roller slider structure shown;

[0024] Figure 5 for Figure 1 Schematic diagram of the bending main drive structure shown;

[0025] Figure 6 for Figure 5 A cross-sectional view of the structure shown.

[0026] in, Figures 1-6 middle:

[0027] Adsorption fixture carrier - 1, screen material fixture carrier - 2, bending adjustment stepper motor assembly - 3, bending main drive - 4, bending angle adjustment drive assembly - 5, bending axis adjustment drive assembly - 6, positioning platform - 7, leveling rubber pad - 8, loading and unloading screw module - 9, first linkage screw module - 10, second linkage screw module - 11, camera drive mechanism - 12, synchronous belt - 13, planetary reducer - 14, drive motor - 15, bending Bending adjustment auxiliary mechanism—16, bending angle adjustment servo motor—17, speed reducer—18, coupling—19, ball screw—20, roller slider—21, adjustment mechanism—22, bending preload block—23, precision angular contact bearing—24, precision thrust bearing—25, precision deep groove ball bearing—26, synchronous wheel—27, hollow platform—28, right hinge support—29, left hinge support—30, linear guide adjustment—31, cylinder—32. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of the overall structure of a specific embodiment provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the screen material fixture carrier structure shown; Figure 3 for Figure 1 Another angle view of the structure shown; Figure 4 for Figure 3 The schematic diagram of the roller slider structure shown; Figure 5for Figure 1 Schematic diagram of the bending main drive structure shown; Figure 6 for Figure 5 A cross-sectional view of the structure shown.

[0030] In a specific embodiment provided by the present invention, it mainly includes an adsorption jig carrier 1, a screen material jig carrier 2, a bending adjustment stepper motor assembly 3, a bending main drive 4, a bending angle adjustment drive assembly 5 and a bending axis adjustment drive assembly 6. The adsorption jig carrier 1 is slidably set on the bending adjustment stepper motor assembly 3, the screen material jig carrier 2 is located below the adsorption jig carrier 1 and is used to place the product, the bending main drive 4 is connected to the bending adjustment stepper motor assembly 3, the bending adjustment stepper motor assembly 3 is slidably set on the bending axis adjustment drive assembly 6, and the bending axis adjustment drive assembly 6 is slidably set on the bending angle adjustment drive assembly 5.

[0031] Among them, the adsorption jig carrier 1 is slidably set on the bending adjustment stepper motor assembly 3, the adsorption jig carrier 1 is used to adsorb and fix the products loaded on the screen incoming jig carrier 2, the screen incoming jig carrier 2 is located below the adsorption jig carrier 1 and is used to place the product, the bending main drive 4 is connected to the bending adjustment stepper motor assembly 3, the bending main drive 4 is used to bend the product through a preset trajectory, the bending adjustment stepper motor assembly 3 is slidably set on the bending axis adjustment drive assembly 6, the bending adjustment stepper motor assembly 3 is used to adjust the center position of the bending R angle of the product, the bending axis adjustment drive assembly 6 is slidably set on the bending angle adjustment drive assembly 5, and the bending axis adjustment drive assembly 6 is used to adjust the alignment of the θ axis when bending the product.

[0032] Specifically, in the actual application process, the incoming product is placed on the screen incoming material jig carrier 2. At this time, the adsorption jig carrier 1 stops in the standby position according to the characteristics of the product, that is, it holds the appropriate position of the product FPC, the adsorption jig carrier 1 is vacuum opened, the screen incoming material jig carrier 2 is flipped to the appropriate angle, the adsorption jig carrier 1 vacuum adsorbs the FPC, the screen incoming material jig carrier 2 returns to the initial position, the bending adjustment stepper motor assembly 3 adjusts the center position of the bending R angle of the FPC to make the center position accurate when the FPC is bent, the bending axis adjustment drive assembly 6 adjusts the alignment of the θ axis when the FPC is bent to make the FPC and the screen body accurately aligned, the bending main drive 4 is linked with a pre-set motion trajectory, and the bending linkage continues until the FPC is completely bent.

[0033] It should be noted that an alignment platform 7 is provided under the screen material jig carrier 2, and a leveling rubber pad 8 is also provided under the alignment platform 7. The leveling rubber pad 8 is used to adjust the alignment platform 7 in the horizontal direction, so that the alignment platform 7 can be in a horizontal state. When the product is loaded onto the screen material jig carrier 2, the horizontality of the product is guaranteed, which provides more favorable conditions for the subsequent FPC bending process.

[0034] Furthermore, the flexible circuit board bending equipment also includes a loading and unloading screw module 9 for slidingly connecting the screen incoming material jig carrier 2. When the product is loaded or unloaded, the operator places the product on the screen incoming material jig carrier 2. The loading and unloading screw module 9 is responsible for moving the screen incoming material jig carrier 2 so that the product reaches the corresponding adsorption position of the adsorption jig carrier 1. Automated processing can reduce errors caused by human operations.

[0035] It should be noted that the flexible circuit board bending equipment also includes a first linkage screw module 10 for connecting to the bending main drive 4. The bending main drive 4 drives the first linkage screw module 10 according to a preset driving mode, and the first linkage screw module 10 performs a bending action on the FPC.

[0036] Furthermore, the flexible circuit board bending equipment also includes a second linkage screw module 11 for slidingly connecting the bending axis adjustment drive assembly 6, and the second linkage screw module 11 is connected to the bending angle adjustment drive assembly 5. The second linkage screw module 11 is driven by the bending axis adjustment drive assembly 6 and the bending angle adjustment drive assembly 5, and is used to adjust the axial position and angular position of the FPC, so that the FPC can adjust the axial position and angular position at the same time.

[0037] It should be noted that the flexible circuit board bending equipment also includes a photographing drive mechanism 12 arranged on the outside of the screen material jig carrier 2. The photographing drive mechanism 12 includes a synchronous belt 13, a planetary reducer 14 and a drive motor 15. One end of the planetary reducer 14 is connected to the drive motor 15, and the synchronous belt 13 is transmission-connected to the other end of the planetary reducer 14. The synchronous belt 13 is meshed with the pulley on the outside of the screen material jig carrier 2, and there are right hinge supports 29 and left hinge supports 30 arranged at both ends of the screen material jig carrier 2. When the screen material jig carrier 2 is fed, the drive motor 15 starts to drive the planetary reducer 14 to move. The planetary reducer 14 drives the synchronous belt 13 to rotate, and the synchronous belt 13 drives the screen material jig carrier 2 to rotate around the right hinge support 29 and the left hinge support 30 at both ends to rotate the product. During this process, a photo is taken at the initial position of the product, a photo is taken when the adsorption jig carrier 1 adsorbs the FPC, and a photo is taken when the FPC is about to complete the bending. The screen material jig carrier 2 is used as a feeding platform, a flip function for FPC photography, and a sampling inspection platform for easy operation by personnel, which greatly reduces the size and weight of the feeding platform components, thereby improving the stability and efficiency of the equipment.

[0038] Furthermore, the flexible circuit board bending device also includes a bending adjustment auxiliary mechanism 16 connected to the bending angle adjustment drive assembly 5, the bending adjustment auxiliary mechanism 16 includes a linear guide rail 31 and a cylinder 32, the bending angle adjustment drive assembly 5 also includes a bending angle adjustment servo motor 17, a reducer 18, a coupling 19, a ball screw 20 and a roller slider 21, the reducer 18 is connected to the bending angle adjustment servo motor 17, the coupling 19 is connected to the reducer 18, the ball screw 20 is connected to the coupling 19, and the movable nut of the ball screw 20 Slidingly connected to the roller slider 21, the bending angle adjustment servo motor 17 drives the movable nut of the ball screw 20 to move up and down, which is converted into a small range movement of the slider for adjusting the linear guide 31 through the roller slider 21 mechanism. During the movement of the slider, the cylinder 32 plays the role of pre-tightening of the roller slider 21 and return of the mechanism. The line contact rolling friction principle of the roller slider 21 is utilized to make the position accuracy of the center of the bending R angle easier to obtain. The change of transmission direction can greatly simplify the installation method, thereby improving the production accuracy and operability of the equipment.

[0039] It should be noted that the bending adjustment stepper motor assembly 3 is provided with an adjustment mechanism 22 and a bending pre-pressing block 23. The bending pre-pressing block 23 is installed on the side of the adjustment mechanism 22. The adsorption fixture carrier 1 is arranged in the adjustment mechanism 22. The adjustment mechanism 22 includes a precision angular contact bearing 24, a precision thrust bearing 25, a precision deep groove ball bearing 26 and a synchronous wheel 27. The precision angular contact bearing 24, the precision thrust bearing 25, the precision deep groove ball bearing 26 and the synchronous wheel 27 are all connected to the adsorption fixture carrier 1. The bending adjustment stepper motor assembly 3 is connected to the synchronous wheel 27 through a synchronous belt to drive the adsorption fixture carrier 1 to rotate in the θ direction. The adjustment mechanism 22 is used to align the θ axis when bending the FPC to ensure that the FPC is aligned with the θ axis after bending. The screen has no deflection angle, that is, the length and width directions are parallel. The adsorption fixture carrier 1 can be driven by the bending adjustment stepper motor assembly 3 to make alignment adjustment in the θ direction, and can also be driven by the hollow platform 28 in conjunction with the bending adjustment stepper motor assembly 3 to make a pre-set bending trajectory movement. The θ direction rotation of the FPC adsorption fixture is based on the movement of the precision angular contact bearing 24, the precision thrust bearing 25, and the precision deep groove ball bearing 26 precision bearings. It is accurate and efficient, so that the θ axis of the FPC is separated from the alignment platform, miniaturized and integrated under the adsorption fixture carrier 1, realizing the most direct way to achieve functional requirements, avoiding cumulative transmission errors and cumulative assembly errors, thereby improving production accuracy and equipment operability.

[0040] Furthermore, a hollow platform 28 is provided at the output end of the bending main drive 4, and a bending adjustment stepper motor assembly 3 is installed on the side of the hollow platform 28. The hollow platform 28 and the bending adjustment stepper motor assembly 3 are used together to drive the FPC to perform a bending action.

[0041] In summary, the flexible circuit board bending equipment provided in this embodiment mainly includes an adsorption jig carrier, a screen material jig carrier, a bending adjustment stepper motor assembly, a bending main drive, a bending angle adjustment drive assembly and a bending axis adjustment drive assembly. The adsorption jig carrier is slidably arranged on the bending adjustment stepper motor assembly. The screen material jig carrier is located below the adsorption jig carrier and is used to place products. The bending main drive is connected to the bending adjustment stepper motor assembly. The bending adjustment stepper motor assembly is slidably arranged on the bending axis adjustment drive assembly. The bending axis adjustment drive assembly is slidably arranged on the bending angle adjustment drive assembly. The product material is placed on the screen material jig carrier. At this time, the adsorption jig carrier stops in the standby position according to the characteristics of the product, that is, it holds the appropriate position of the product FPC, and the adsorption The vacuum of the attached jig carrier is turned on, the screen material jig carrier is flipped to the appropriate angle, the adsorption jig carrier vacuum adsorbs the FPC, the screen material jig carrier returns to the initial position, and the bending adjustment stepper motor assembly adjusts the center position of the FPC bending R angle to make the center position accurate when the FPC is bent. The bending axis adjustment drive assembly adjusts the θ axis when bending the FPC to make the FPC and the screen body accurately aligned. The main bending drive is linked with a pre-set motion trajectory, and the bending linkage continues until the FPC is completely bent. Through the split control of the FPC bending center alignment and the screen body alignment, the required position accuracy of the bending center and the position accuracy of the FPC relative to the screen after bending are stably obtained, which greatly improves the accuracy and efficiency of the flexible circuit board bending process.

[0042] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flexible circuit board bending device, characterized in that: The invention comprises an adsorption jig carrier (1), a screen material jig carrier (2), a bending adjustment stepper motor assembly (3), a bending main drive (4), a bending angle adjustment drive assembly (5) and a bending axis adjustment drive assembly (6), wherein the adsorption jig carrier (1) is slidably arranged on the bending adjustment stepper motor assembly (3), the screen material jig carrier (2) is located below the adsorption jig carrier (1) and is used to place products, the bending main drive (4) is connected to the bending adjustment stepper motor assembly (3), the bending adjustment stepper motor assembly (3) is slidably arranged on the bending axis adjustment drive assembly (6), and the bending axis adjustment drive assembly (6) is slidably arranged on the bending angle adjustment drive assembly (5); It also includes a bending adjustment auxiliary mechanism (16) connected to the bending angle adjustment drive assembly (5), and the bending adjustment auxiliary mechanism (16) includes an adjustment linear guide rail (31) and a cylinder (32); The bending angle adjustment drive assembly (5) comprises a bending angle adjustment servo motor (17), a reducer (18), a coupling (19), a ball screw (20) and a roller slider (21), wherein the reducer (18) is connected to the bending angle adjustment servo motor (17), the coupling (19) is connected to the reducer (18), the ball screw (20) is connected to the coupling (19), and the movable nut of the ball screw (20) is slidably connected to the roller slider (21); The bending adjustment stepper motor assembly (3) is provided with an adjustment mechanism (22) and a bending pre-pressing block (23), the bending pre-pressing block (23) is installed on the side of the adjustment mechanism (22), and the adsorption fixture carrier (1) is provided in the adjustment mechanism (22); The adjustment mechanism (22) comprises a precision angular contact bearing (24), a precision thrust bearing (25), a precision deep groove ball bearing (26) and a synchronous wheel (27), and the precision angular contact bearing (24), the precision thrust bearing (25), the precision deep groove ball bearing (26) and the synchronous wheel (27) are all connected to the adsorption fixture carrier (1).

2. The flexible circuit board bending device according to claim 1, characterized in that: A positioning platform (7) is provided below the screen material feed fixture carrier (2), and a leveling rubber pad (8) is also provided below the positioning platform (7).

3. The flexible circuit board bending device according to claim 2, characterized in that: It also includes a loading and unloading screw module (9) for slidingly connecting the screen material fixture carrier (2).

4. The flexible circuit board bending device according to claim 3, characterized in that: It also includes a first linked screw module (10) for connecting to the bending main drive (4).

5. The flexible circuit board bending device according to claim 4, characterized in that: It also includes a second linked screw module (11) for slidingly connecting the bending axis adjustment drive assembly (6), and the second linked screw module (11) is connected to the bending angle adjustment drive assembly (5).

6. The flexible circuit board bending device according to claim 1, characterized in that: It also includes a photographing drive mechanism (12) arranged outside the screen material incoming fixture carrier (2).

7. The flexible circuit board bending device according to claim 6, characterized in that: The photographing drive mechanism (12) comprises a synchronous belt (13), a planetary reducer (14) and a drive motor (15), one end of the planetary reducer (14) is connected to the drive motor (15), the synchronous belt (13) is transmission-connected to the other end of the planetary reducer (14), and the synchronous belt (13) is meshedly connected to a pulley on the outside of the screen material feed fixture carrier (2).

8. The flexible circuit board bending device according to claim 1, characterized in that: The output end of the bending main drive (4) is further provided with a hollow platform (28), and the bending adjustment stepping motor assembly (3) is installed on the side of the hollow platform (28).

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