Foldable reinforced FPC flexible circuit board

Abstract

The utility model relates to the field of FPC boards, and discloses a foldable reinforced FPC flexible circuit board, which comprises an FPC board, the left end and the right end of the FPC board are fixedly connected with welding boards, the middle part of the FPC board is provided with a bending board, the bending board is V-shaped, the left side and the right side of the bending board are fixedly connected with board bodies, and the board bodies are fixedly connected with the left side and the right side of the bending board. The welding plate is fixedly connected with the ends, far away from each other, of the two plate bodies, the upper side and the lower side of the front portion and the rear portion of the bent plate are fixedly connected with reinforcing strips, the reinforcing strips are fixed to the middle bent position of the bent plate and are made of flexible colloid materials, the outer portion of the welding plate is fixedly connected with a plurality of golden fingers, and the FPC plate comprises a substrate. According to the utility model, the bending plate is arranged in the middle section of the FPC board, and the bending plate is V-shaped, so that the FPC board can be effectively prevented from being damaged due to excessive stress concentration when the FPC board is folded, the service life of the FPC board can be prolonged, and the FPC board is more practical.

Description

Technical Field

[0001] This utility model relates to the field of FPC boards, and in particular to a foldable and reinforced FPC flexible circuit board. Background Technology

[0002] FPC, or Flexible Printed Circuit Board, is a type of circuit board that is flexible and bendable. It is usually made of polyimide or polyester material and has good electrical and mechanical properties. FPC boards are widely used in mobile phones, tablets, medical devices, automotive electronics and other fields, and are favored for their thinness, small size and strong adaptability.

[0003] When FPC boards are used in applications such as foldable screen phones, wearable devices, or medical devices such as portable monitoring devices, these application scenarios require FPC boards to have high flexibility within a limited space, and the FPC boards will be folded and operated multiple times during use.

[0004] Existing traditional FPC boards, when repeatedly folded, experience stress concentration, which can lead to material fatigue in the circuit wires, gradually forming micro-cracks and eventually causing breakage. Furthermore, due to the lack of reinforcement and cushioning after repeated folding, creases easily appear at the folded areas of some traditional FPC boards, accelerating fatigue damage over time and affecting their lifespan, making them impractical. Therefore, a foldable reinforced FPC flexible circuit board is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a foldable and reinforced FPC flexible circuit board, which aims to improve the problem that some existing traditional FPC boards, when repeatedly folded, cause stress concentration, which leads to material fatigue of the wires in the circuit, gradually forming micro cracks and eventually causing breakage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a foldable and reinforced FPC flexible circuit board, comprising an FPC board, wherein welding plates are fixedly connected to both the left and right ends of the FPC board, and a bending plate is provided in the middle of the FPC board, wherein the bending plate is configured as a V-shape.

[0007] As a further description of the above technical solution:

[0008] The bending plate is fixedly connected to the left and right sides of the plate body, and the welding plate is fixedly connected to the two ends of the plate body that are far apart from each other.

[0009] As a further description of the above technical solution:

[0010] The front and rear upper and lower sides of the bent plate are fixedly connected with reinforcing strips.

[0011] As a further description of the above technical solution:

[0012] The reinforcing strip is fixed at the middle bend of the bent plate and is made of flexible rubber material.

[0013] As a further description of the above technical solution:

[0014] The welding plate is externally fixed with gold fingers, and there are multiple gold fingers.

[0015] As a further description of the above technical solution:

[0016] The FPC board includes a substrate, a circuit layer is fixedly connected to the upper part of the substrate, and a bottom coating layer is fixedly connected to the bottom of the substrate.

[0017] As a further description of the above technical solution:

[0018] A reinforcing layer is fixedly connected to the lower part of the bottom film layer.

[0019] As a further description of the above technical solution:

[0020] A top cover film layer is fixedly connected to the upper part of the circuit layer, and a reinforcement cover film layer is fixedly connected to the lower part of the reinforcement layer.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by setting a bending plate in the middle section of the FPC board and setting the bending plate in a V shape, the stress concentration of the FPC board can be effectively avoided when it is folded, thereby preventing damage to the FPC board and extending the service life of the FPC board, making it more practical.

[0023] 2. In this utility model, by providing reinforcing strips on the upper and lower sides and front and rear parts of the bending plate, the reinforcing strips can deform along with the bending plate when it is bent, while providing a certain degree of support for the bending plate and preventing the bending plate from being over-bent and producing creases, making it more practical. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a foldable and reinforced FPC flexible circuit board proposed in this utility model;

[0025] Figure 2 This is a partial three-dimensional structural diagram of the bending plate of a foldable and reinforced FPC flexible circuit board proposed in this utility model during bending.

[0026] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of a foldable and reinforced FPC flexible circuit board proposed in this utility model.

[0027] Legend:

[0028] 1. FPC board; 2. Welding board; 11. Board body; 12. Bending board; 121. Reinforcing strip; 21. Gold finger; 101. Substrate; 102. Circuit layer; 103. Top cover film; 104. Bottom cover film layer; 105. Reinforcing layer; 106. Reinforcing cover film. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a foldable and reinforced FPC flexible circuit board, including an FPC board 1, which is a foldable and reinforced FPC flexible circuit board. Welding plates 2 are fixedly connected to both the left and right ends of the FPC board 1 for installation and use. Multiple gold fingers 21 are fixedly connected to the outside of the welding plates 2 for welding the FPC board 1. A bending plate 12 is provided in the middle of the FPC board 1, serving as the bending part of the FPC board 1. The bending plate 12 is V-shaped, with the upper circuitry conforming to its shape. The V-shape design reduces stress concentration during folding, thus protecting the upper circuitry. Plate bodies 11 are fixedly connected to both the left and right sides of the bending plate 12, and the welding plates 2 are fixedly connected to the ends of the two plate bodies 11 that are far apart from each other.

[0031] Furthermore, reinforcing strips 121 are fixedly connected to the front and rear upper and lower sides of the bending plate 12. These strips provide a certain degree of support to the bending point during bending, preventing direct contact between the bending plate 12 and the bending point, or excessive bending that could cause creases and damage to the FPC plate 1. The reinforcing strips 121 are fixed at the middle bending point of the bending plate 12. They are made of flexible rubber material and can deform according to the bending to match the bending of the bending plate 12 and provide certain support to reduce the possibility of creases during bending.

[0032] Furthermore, the FPC board 1 includes a substrate 101, which is the main foundation of the FPC board 1. A circuit layer 102 is fixedly connected to the upper part of the substrate 101 to ensure the continuity of the circuit. A bottom cover film layer 104 is fixedly connected to the bottom of the substrate 101 to protect the substrate 101. A reinforcing layer 105 is fixedly connected to the lower part of the bottom cover film layer 104, which is provided with cross pressure lines. A top cover film layer 103 is fixedly connected to the upper part of the circuit layer 102. A reinforcing cover film layer 106 is fixedly connected to the lower part of the reinforcing layer 105. The top cover film layer 106 and the reinforcing cover film layer 106 cooperate with each other to protect the FPC board 1.

[0033] Working principle: During installation, the gold fingers on the welding plate 2 of the FPC board 1 are welded together with the welding position 21 using solder. When installing the FPC board 1, it is necessary to ensure that the bending plate 12 is located in the bending area. When the FPC board 1 needs to be folded during use, the bending plate 12 will bend, and the reinforcing strips 121 connecting the upper and lower parts of the bending plate 12 will also bend and deform to a certain extent, providing a certain degree of support for the bending plate 12 and preventing creases from forming at the bending point. When the bending plate 12 is bent, since the bending plate 12 is set in a V shape with a certain curvature, and the circuit on its upper part is also set to follow its shape, the stress in this area will be dispersed to a certain extent when the bending plate 12 bends, preventing damage to the FPC board 1 due to stress concentration. Furthermore, a reinforcing layer 105 is provided in the FPC board 1, which can provide a certain degree of support and reinforcement when the FPC board 1 is bent.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foldable and reinforced FPC flexible circuit board, comprising an FPC board (1), characterized in that: The FPC board (1) is fixedly connected to welding plates (2) at both ends, and a bending plate (12) is provided in the middle of the FPC board (1), and the bending plate (12) is set in a V shape.

2. The foldable reinforced FPC flexible circuit board according to claim 1, characterized in that: The bending plate (12) is fixedly connected to the left and right sides of the plate body (11), and the welding plate (2) is fixedly connected to the two ends of the plate body (11) that are far apart from each other.

3. The foldable reinforced FPC flexible circuit board according to claim 1, characterized in that: The bending plate (12) is fixedly connected to the upper and lower sides of the front and rear parts by reinforcing strips (121).

4. A foldable reinforced FPC flexible circuit board according to claim 3, characterized in that: The reinforcing strip (121) is fixed at the middle bend of the bending plate (12) and is made of flexible adhesive material.

5. A foldable reinforced FPC flexible circuit board according to claim 1, characterized in that: The welding plate (2) is externally fixedly connected with gold fingers (21), and there are multiple gold fingers (21).

6. A foldable reinforced FPC flexible circuit board according to claim 1, characterized in that: The FPC board (1) includes a substrate (101), a circuit layer (102) is fixedly connected to the upper part of the substrate (101), and a bottom coating layer (104) is fixedly connected to the bottom of the substrate (101).

7. A foldable reinforced FPC flexible circuit board according to claim 6, characterized in that: A reinforcing layer (105) is fixedly connected to the lower part of the bottom film layer (104).

8. A foldable reinforced FPC flexible circuit board according to claim 7, characterized in that: The upper part of the circuit layer (102) is fixedly connected to the top cover film layer (103), and the lower part of the reinforcement layer (105) is fixedly connected to the reinforcement cover film layer (106).

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