Multi-layer bending-resistant FPC flexible circuit board structure

Abstract

The utility model discloses a multilayer anti-bending FPC flexible circuit board structure, which comprises an FPC circuit board main body and an anti-bending structure, the FPC circuit board main body is formed by compounding a plurality of layers of structures, and the anti-bending structure is arranged on the FPC circuit board main body; when the FPC circuit board main body is in a bending and folding state, the FPC circuit board main body has a transitional cambered surface through the bending-resistant structure, and can not be directly folded by 90 degrees or 180 degrees. According to the utility model, through the anti-bending structure, when the FPC circuit board main body is in a bending state, a transitional cambered surface can be formed, and direct folding of 90 degrees or 180 degrees is avoided, so that stress can be effectively dispersed, and the damage risk of the FPC circuit board under extreme conditions is reduced.

Description

Technical Field

[0001] This utility model relates to a, specifically to a multilayer bend-resistant FPC flexible circuit board structure. Background Technology

[0002] With the rapid development of electronic technology, flexible printed circuit boards (FPCs) are being used more and more widely, especially in fields such as smartphones, wearable devices, automotive electronics, and medical devices. FPCs are favored for their thinness and flexibility, but they also face the challenge of insufficient bending resistance. Traditional FPCs often need to be bent or folded during use, but their material and structural limitations make them prone to circuit breakage or functional failure under extreme bending conditions of 90° or 180°. This defect is particularly evident in high-frequency applications, seriously affecting the reliability and lifespan of devices.

[0003] When FPC is bent or folded, stress concentration often occurs, causing certain areas to bear excessive mechanical stress, which in turn leads to circuit damage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multilayer anti-bending FPC flexible circuit board structure to solve the problems existing in the background art.

[0005] The multi-layer anti-bending FPC flexible circuit board structure of this utility model is achieved through the following technical solution, including the FPC circuit board body and the anti-bending structure;

[0006] The FPC circuit board body is composed of a multi-layer composite structure, and an anti-bending structure is provided on the FPC circuit board body; when the FPC circuit board body is in a bent and folded state, the anti-bending structure makes it have a transitional arc surface, so that it cannot be folded directly at 90° or 180°.

[0007] As a preferred technical solution, the anti-bending structure includes clamping components disposed on both sides, and an upper transition shaft and a lower transition shaft are rotatably disposed above and below the clamping components via bearings;

[0008] When the anti-bending structure is installed, the upper transition shaft is placed above the FPC circuit board body, and the lower transition shaft is placed below the FPC circuit board body.

[0009] As a preferred technical solution, the clamping assembly includes an upper clamping seat and a lower clamping seat;

[0010] A guide groove is provided below the upper clamping seat, and a guide block is provided above the lower clamping seat. The guide block is inserted into the guide groove. A spring groove is provided in the center of the guide block, and a tension spring is provided in the spring groove.

[0011] One end of the tension spring is fixed in the spring groove, and the other end of the tension spring is fixed in the guide groove, thereby realizing the assembly of the upper clamping seat and the lower clamping seat. Under the action of the tension spring, the upper transition shaft and the lower transition shaft have an inward squeezing force to prevent the FPC circuit board body from separating from the anti-bending structure.

[0012] As a preferred technical solution, both the upper and lower transition shafts are equipped with rotating shafts, and the rotating shafts are fixed to the inner ring of the bearing, thereby realizing the rotational connection between the upper and lower transition shafts.

[0013] As a preferred technical solution, the main body of the FPC circuit board includes an upper conductive layer, an intermediate insulating layer, and a lower conductive layer, and the upper conductive layer, the intermediate insulating layer, and the lower conductive layer are compositely connected; the conductive layer is made of a highly conductive material, and the insulating layer is made of a high-strength, bend-resistant flexible material.

[0014] As a preferred technical solution, the upper transition shaft and the lower transition shaft are made of insulating material.

[0015] The beneficial effects of this utility model are:

[0016] This invention utilizes an anti-bending structure to form a transitional arc surface when the FPC circuit board body is in a bent state, avoiding direct folding at 90° or 180°, thus effectively dispersing stress and reducing the risk of damage to the FPC circuit board under extreme conditions.

[0017] This invention uses a clamping component to tightly integrate the FPC circuit board body with the anti-bending structure, preventing them from separating during use and allowing the FPC circuit board body to be bent at any position. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the bending structure of this utility model;

[0021] Figure 3 and Figure 4 This is a schematic diagram of the bending-resistant structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the clamping assembly structure of this utility model.

[0023] 1. FPC circuit board body; 2. Anti-bending structure; 3. Clamping assembly; 4. Upper transition shaft; 5. Lower transition shaft; 6. Bearing; 7. Upper clamping seat; 8. Lower clamping seat; 9. Guide groove; 10. Guide block; 11. Spring groove; 12. Tension spring; 13. Rotating shaft; 14. Upper conductive layer; 15. Intermediate insulating layer; 16. Lower conductive layer. Detailed Implementation

[0024] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0025] like Figures 1-5 As shown, the present invention provides a multilayer anti-bending FPC flexible circuit board structure, including an FPC circuit board body 1 and an anti-bending structure 2.

[0026] The FPC circuit board body 1 is composed of a multi-layer structure, and the anti-bending structure 2 is disposed on the FPC circuit board body 1. When the FPC circuit board body 1 is in a bent and folded state, the anti-bending structure 2 makes it have a transitional arc surface, so that it cannot be folded directly at 90° or 180°.

[0027] The anti-bending structure 2 includes clamping components 3 on both sides, and an upper transition shaft 4 and a lower transition shaft 5 are rotatably provided above and below the clamping components 3 via bearings 6.

[0028] When the anti-bending structure 2 is installed, the upper transition shaft 4 is positioned above the FPC circuit board body 1, and the lower transition shaft 5 is positioned below the FPC circuit board body 1.

[0029] In order to facilitate the clamping and fixing of the FPC circuit board body, in this embodiment, the clamping assembly 3 includes an upper clamping seat 7 and a lower clamping seat 8;

[0030] A guide groove 9 is provided below the upper clamping seat 7, and a guide block 10 is provided above the lower clamping seat 8. The guide block 10 is inserted into the guide groove 9. A spring groove 11 is provided in the center of the guide block 10, and a tension spring 12 is provided in the spring groove 11.

[0031] One end of the tension spring 12 is fixed in the spring groove 11, and the other end of the tension spring 12 is fixed on the guide groove 9, thereby realizing the assembly of the upper clamping seat 7 and the lower clamping seat 8. Under the action of the tension spring 12, the upper transition shaft 4 and the lower transition shaft 5 have an inward squeezing force to prevent the FPC circuit board body 1 from separating from the anti-bending structure 2.

[0032] In addition, both the upper transition shaft 4 and the lower transition shaft 5 are provided with a rotating shaft 13, and the rotating shaft 13 is fixed to the inner ring of the bearing 6, thereby realizing the rotational connection between the upper transition shaft 4 and the lower transition shaft 5.

[0033] The FPC circuit board body 1 includes an upper conductive layer 14, an intermediate insulating layer 15, and a lower conductive layer 16, and the upper conductive layer 14, the intermediate insulating layer 15, and the lower conductive layer 16 are compositely connected; the conductive layer is made of a highly conductive material (such as copper foil), and the insulating layer is made of a high-strength, bend-resistant flexible material (such as polyimide).

[0034] In order to achieve the effect of insulation protection, in this embodiment, the upper transition shaft 4 and the lower transition shaft 5 are made of insulating material.

[0035] This invention utilizes an anti-bending structure to form a transitional arc surface when the FPC circuit board body is in a bent state, avoiding direct folding at 90° or 180°, thus effectively dispersing stress and reducing the risk of damage to the FPC circuit board under extreme conditions.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A multilayer bend-resistant FPC flexible circuit board structure, characterized in that, It includes an FPC circuit board body (1) and a bending-resistant structure (2); The FPC circuit board body (1) is composed of a multi-layer structure, and the anti-bending structure (2) is set on the FPC circuit board body (1); when the FPC circuit board body (1) is in a bent and folded state, the anti-bending structure (2) makes it have a transitional arc surface, and it cannot be directly folded at 90° or 180°.

2. The multilayer bend-resistant FPC flexible circuit board structure according to claim 1, characterized in that: The anti-bending structure (2) includes clamping components (3) disposed on both sides, and an upper transition shaft (4) and a lower transition shaft (5) are rotatably disposed above and below the clamping components (3) via bearings (6); When the anti-bending structure (2) is installed, the upper transition shaft (4) is placed above the FPC circuit board body (1), and the lower transition shaft (5) is placed below the FPC circuit board body (1).

3. The multilayer bend-resistant FPC flexible circuit board structure according to claim 2, characterized in that: The clamping assembly (3) includes an upper clamping seat (7) and a lower clamping seat (8); The upper clamping seat (7) is provided with a guide groove (9) below, and the lower clamping seat (8) is provided with a guide block (10) above. The guide block (10) is inserted into the guide groove (9). The guide block (10) is provided with a spring groove (11) in the center, and a tension spring (12) is provided in the spring groove (11). One end of the tension spring (12) is fixed in the spring groove (11), and the other end of the tension spring (12) is fixed on the guide groove (9), thereby realizing the assembly of the upper clamping seat (7) and the lower clamping seat (8). Under the action of the tension spring (12), the upper transition shaft (4) and the lower transition shaft (5) have an inward squeezing force to prevent the FPC circuit board body (1) from separating from the anti-bending structure (2).

4. The multilayer bend-resistant FPC flexible circuit board structure according to claim 3, characterized in that: Both the upper transition shaft (4) and the lower transition shaft (5) are provided with a rotating shaft (13), and the rotating shaft (13) is fixed to the inner ring of the bearing (6), thereby realizing the rotational connection between the upper transition shaft (4) and the lower transition shaft (5).

5. The multilayer bend-resistant FPC flexible circuit board structure according to claim 1, characterized in that: The FPC circuit board body (1) includes an upper conductive layer (14), an intermediate insulating layer (15) and a lower conductive layer (16), and the upper conductive layer (14), the intermediate insulating layer (15) and the lower conductive layer (16) are compositely connected; the conductive layer is made of a highly conductive material and the insulating layer is made of a high-strength, bend-resistant flexible material.

6. The multilayer bend-resistant FPC flexible circuit board structure according to claim 3, characterized in that: The upper transition shaft (4) and the lower transition shaft (5) are made of insulating material.

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