A folding keyboard wiring connection structure

Abstract

The application relates to a folding keyboard line connection structure used for the connection between the key areas of a folding keyboard, which comprises a flexible printed circuit board provided with copper wires; the folding keyboard has at least two key areas, and each of the at least two key areas is provided with a conductive film, one side of the conductive film is provided with a conductive silver paste line facing the keys of the key area, and at least part of the conductive film is reversely folded and connected with the flexible printed circuit board through an ACF process, so as to realize the electrical conduction and mechanical bonding between the conductive film and the flexible printed circuit board; the flexible printed circuit board can be bent, and then a bending area is formed in the key area connection area of the folding keyboard, and the folding keyboard is bent and folded through the bending area.

Description

Technical Field

[0001] This application belongs to the field of folding keyboard technology and relates to a folding keyboard circuit connection structure. Background Technology

[0002] With the increasing prevalence of mobile work and portable electronic devices, folding keyboards have become an important peripheral accessory for smartphones, tablets, and other devices due to their compact size and portability. Folding keyboards typically achieve folding by dividing the keyboard body into multiple key areas and incorporating bending mechanisms between these areas, thus significantly reducing the space they occupy when stored.

[0003] In existing technologies, there are two main solutions for connecting the circuits between different sections of a folding keyboard: direct conductive film connection and socket connection. However, the direct conductive film connection involves directly attaching the conductive film across the keyboard's folding hinge. During repeated opening and closing of the keyboard, the conductive film is subjected to frequent bending and stress concentration at the hinge, which can easily lead to fatigue and breakage of the internal circuitry, causing partial or complete keyboard malfunction. The socket connection method involves placing circuit boards on each folding section of the keyboard and interconnecting them using independent connectors (such as board-to-board connectors or wire-to-board connectors). However, the connectors themselves have a large physical size and height, requiring significant space inside the keyboard. This contradicts the design philosophy of folding keyboards, which emphasizes thinness and lightness, and limits the layout of the keyboard's internal structure. Utility Model Content

[0004] To overcome the problems existing in related technologies, this application aims to provide a folding keyboard circuit connection structure that can increase the stability and lifespan of the circuit connection, save space and reduce product thickness.

[0005] This application is achieved through the following technical solution.

[0006] This technical solution provides a wiring connection structure for a foldable keyboard, used for connecting the key areas of a foldable keyboard, including:

[0007] A flexible printed circuit board, wherein the flexible printed circuit board is provided with copper wires;

[0008] The folding keyboard has at least two key areas, each of which is provided with a conductive film. The conductive film has a side with conductive silver paste lines facing the key area. At least a portion of the conductive film is folded back and connected to a flexible printed circuit board through an ACF (Anisotropic Conductive Film) process to achieve electrical conduction and mechanical bonding between the conductive film and the flexible printed circuit board.

[0009] The flexible printed circuit board can be bent, thereby forming a bending area in the key area connection area of ​​the folding keyboard, and the folding keyboard is folded through the bending area.

[0010] This technical solution uses a conductive film to connect a flexible printed circuit board, and the conductive film and the flexible printed circuit board are connected by ACF process. The flexible printed circuit board can be bent and folded freely, which increases the stability and lifespan of the circuit connection, saves space and reduces the product thickness, and is suitable for key area connection of two-fold or multi-fold keyboards.

[0011] The present invention is further configured such that the flexible printed circuit board includes a bending portion and a fixing portion symmetrically arranged about the bending portion, the bending portion being used to bend in conjunction with a folding keyboard, and the fixing portion being connected to a conductive film.

[0012] The present invention is further configured such that there is a height difference between the bending portion and the fixing portion to form an "L"-shaped limit on both sides of the bending portion for positioning the installation position of the flexible printed circuit board.

[0013] The present invention is further configured such that the flexible printed circuit board has a clearance portion for accommodating ACF adhesive.

[0014] The present invention is further configured such that the avoidance part is a protrusion formed on the surface of the flexible printed circuit board after pressing.

[0015] The present invention is further configured such that the avoidance portion is a receiving groove formed on the surface of the flexible printed circuit board.

[0016] The present invention is further configured such that a stress relief groove is provided at the end of the avoidance portion of the flexible printed circuit board, and the stress relief groove is used to accommodate the ACF adhesive that overflows after pressing.

[0017] The present invention is further configured such that the avoidance part is provided in two symmetrical sets, with two in each set.

[0018] The present invention is further configured such that the avoidance part is rectangular or rhomboid.

[0019] The present invention is further configured such that the conductive film is disposed on the bottom plate of the bonding region, and is folded back to cover both sides of the bottom plate.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0022] Figure 1 This is a schematic diagram of the structure shown in one embodiment of this application;

[0023] Figure 2 This is a bottom view shown in one embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a flexible printed circuit board structure shown in one embodiment of this application;

[0025] Figure 4 This is a schematic diagram showing the connection between a conductive film and a flexible printed circuit board in one embodiment of this application.

[0026] Reference numerals: 1. Conductive thin film; 11. Conductive silver paste circuit; 2. Flexible printed circuit board; 21. Copper conductor; 22. Bending part; 23. Fixing part; 24. Clearance part. Detailed Implementation

[0027] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0029] This embodiment discloses a wiring connection structure for a foldable keyboard, used for connecting the key areas of a foldable keyboard, such as... Figures 1-4 As shown, it includes:

[0030] Flexible printed circuit board 2, which is equipped with copper wires 21;

[0031] The folding keyboard has at least two key areas, and each key area is provided with a conductive film 1. The conductive film 1 has a conductive silver paste line 11 on one side facing the key area. At least a portion of the conductive film 1 is folded back and connected to the flexible printed circuit board 2 through ACF process to achieve electrical conduction and mechanical bonding between the conductive film 1 and the flexible printed circuit board 2.

[0032] The flexible printed circuit board 2 can be bent, thereby forming a bending area with the key area of ​​the folding keyboard, and the folding keyboard is folded through the bending area.

[0033] It should be noted that the folding keyboard is existing technology. The conductive film 1 is placed on the base plate and is configured to electrically connect the two electrodes of the corresponding key circuit to generate a trigger signal characterizing the key operation. The flexible printed circuit board 2 refers to the FPC circuit board (Flexible Printed Circuit).

[0034] It should be noted that after the conductive film 1 is folded back, it is connected to the flexible printed circuit board 2 through the ACF process. This means that after the conductive film 1 is placed on one side of the base plate, it is folded back and attached to the other side of the base plate to connect with the flexible printed circuit board 2.

[0035] It should be noted that the conductive film 1 can be lengthened to avoid folding. That is, by increasing the length, the extended part can be connected to the flexible printed circuit board 2. At this time, the flexible printed circuit board 2 and the conductive film 1 are located on the same side of the base plate, realizing electrical conduction and mechanical bonding between the conductive film 1 and the flexible printed circuit board 2.

[0036] By using conductive film 1 to connect flexible printed circuit board 2, conductive film 1 and flexible printed circuit board 2 are connected using ACF process. Flexible printed circuit board 2 can be freely bent and folded, which increases the stability and lifespan of circuit connection, saves space and reduces product thickness, and is suitable for key area connection of two-fold or multi-fold keyboards.

[0037] like Figure 2 and Figure 3 As shown, the flexible printed circuit board 2 includes a bending portion 22 and a fixing portion 23 symmetrically arranged about the bending portion 22. The bending portion 22 is used to bend in conjunction with the folding keyboard, and the fixing portion 23 is connected to the conductive film 1.

[0038] like Figure 2 and Figure 3 As shown, there is a height difference between the bending portion 22 and the fixing portion 23 to form an "L"-shaped limit on both sides of the bending portion 22 for positioning the flexible printed circuit board 2 at its mounting position.

[0039] It should be noted that the height difference between the bending part 22 and the fixing part 23 can reduce the thickness of the folding area of ​​the folding keyboard, thereby reducing the product thickness.

[0040] like Figure 2 and Figure 3 As shown, the flexible printed circuit board 2 has a clearance portion 24, which is used to accommodate ACF adhesive.

[0041] like Figure 2 and Figure 3 As shown, the clearance portion 24 is a protrusion formed on the surface of the flexible printed circuit board 2 after pressing.

[0042] like Figure 2 and Figure 3 As shown, the clearance portion 24 is a receiving groove formed on the surface of the flexible printed circuit board 2.

[0043] It should be noted that the flexible printed circuit board 2 and the conductive film 1 are bonded together by thermo-pressing with anisotropic conductive film (ACF). Within the bonding area, the electrodes of the flexible printed circuit board 2 and the lead circuit of the conductive film 1 are electrically connected through the conductive particles in the anisotropic conductive film. The clearance part 24 refers to the area formed by the flexible printed circuit board 2 at the bonding area to accommodate the anisotropic conductive film.

[0044] like Figure 2 and Figure 3 As shown, the flexible printed circuit board 2 has a stress relief groove at the end of the relief portion 24, which is used to accommodate the ACF adhesive that overflows after pressing.

[0045] like Figure 2 and Figure 3 As shown, the avoidance part 24 has two symmetrical sets, two in each set.

[0046] like Figure 2 and Figure 3 As shown, the clearance part 24 is set as a rectangle or a rhombus.

[0047] like Figures 1-4 As shown, the conductive film 1 is disposed on the base plate of the bonding region, and is folded back to cover both sides of the base plate.

[0048] Working principle: By connecting the conductive film 1 to the flexible printed circuit board 2, the conductive film 1 and the flexible printed circuit board 2 are connected using the ACF process. The flexible printed circuit board 2 can be freely bent and folded, which increases the stability and lifespan of the circuit connection, saves space, and reduces the product thickness. It is suitable for key area connection of two-fold or multi-fold keyboards.

[0049] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A circuit connection structure for a folding keyboard, used for connecting the key areas of a folding keyboard, characterized in that, include: Flexible printed circuit board (2), the flexible printed circuit board (2) is provided with copper wires (21); The folding keyboard has at least two key areas, and each key area is provided with a conductive film (1). The conductive film (1) has a side of conductive silver paste line (11) facing the key area. At least a portion of the conductive film (1) is folded back and connected to the flexible printed circuit board (2) through ACF process to achieve electrical conduction and mechanical bonding between the conductive film (1) and the flexible printed circuit board (2). The flexible printed circuit board (2) can be bent, thereby forming a bending area in the key area connection area of ​​the folding keyboard, and the folding keyboard is bent and folded through the bending area.

2. The folding keyboard circuit connection structure according to claim 1, characterized in that, The flexible printed circuit board (2) includes a bending portion (22) and a fixing portion (23) symmetrically arranged about the bending portion (22). The bending portion (22) is used to bend in conjunction with the folding keyboard, and the fixing portion (23) is connected to the conductive film (1).

3. The folding keyboard circuit connection structure according to claim 2, characterized in that, There is a height difference between the bending part (22) and the fixing part (23) to form an "L" shaped limit on both sides of the bending part (22) for positioning the installation position of the flexible printed circuit board (2).

4. The folding keyboard circuit connection structure according to claim 1, characterized in that, The flexible printed circuit board (2) is provided with a clearance portion (24) for accommodating ACF adhesive.

5. The folding keyboard circuit connection structure according to claim 4, characterized in that, The clearance portion (24) is a protrusion formed on the surface of the flexible printed circuit board (2) after pressing.

6. The folding keyboard circuit connection structure according to claim 4, characterized in that, The clearance portion (24) is a receiving groove formed on the surface of the flexible printed circuit board (2).

7. The folding keyboard circuit connection structure according to claim 4, characterized in that, The flexible printed circuit board (2) has a stress relief groove at the end of the relief portion (24), which is used to accommodate the ACF glue that overflows after pressing.

8. The folding keyboard circuit connection structure according to claim 4, characterized in that, The avoidance part (24) is provided in two symmetrical sets, with two in each set.

9. The folding keyboard circuit connection structure according to claim 4, characterized in that, The avoidance part (24) is set as a rectangle or a rhombus.

10. The folding keyboard circuit connection structure according to claim 1, characterized in that, The conductive film (1) is disposed on the bottom plate of the bonding region and is folded back to cover both sides of the bottom plate.

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