Flexible circuit board

Abstract

The invention relates to the technical field of mobile terminals, and discloses a flexible circuit board. The flexible circuit board comprises a flexible circuit board body, wherein the flexible circuit board body comprises a first extension part and a second extension part; the first extension part has a first inner side edge and a first outer side edge, and the second extension part has a secondinner side edge and a second outer side edge; the first inner side edge and the second inner side edge are connected to form an inner side connecting portion; the first outer side edge and the secondouter side edge are connected to form an outer side connecting portion, and an anti-tearing opening is formed in the inner side connecting portion; the first inner side edge is provided with a firstnotch with an opening facing the second inner side edge, and the bottom edge of the first notch is connected with the side edge of the anti-tearing opening; and / or the second inner side edge is provided with a second notch with an opening facing the first inner side edge, and the bottom edge of the second notch is connected with the other side edge of the anti-tear opening. According to the flexible circuit board, by changing the structural design of the flexible circuit board body, the flexibility of bending of the flexible circuit board body is facilitated.

Description

technical field [0001] The invention relates to the technical field of mobile terminals, in particular to a flexible circuit board. Background technique [0002] Flexible printed circuit (Flexible Printed Circuit, referred to as FPC) is a highly reliable flexible printed circuit board made of polyimide or polyester film, with high wiring density, light weight, Thin thickness, good bendability and so on. Specifically, since the volume of the FPC is smaller than that of a printed circuit board (PCB), it can effectively reduce the volume of the mobile phone and increase the convenience of carrying; and the weight of the FPC is lighter than the PCB board, which can reduce the weight of the mobile phone. Weight; and the thickness of the FPC is thinner than the PCB board, which can improve the softness and strengthen the assembly of the three-dimensional space in the limited space inside the mobile phone. Therefore, in the mobile phone development process, the connection between...

AI Technical Summary

Problems solved by technology

Practice has proved that if the mark 1 is designed at a right angle, when the flexible circuit board is stretched, it is easy to generate stress concentration here, resulting in cracks, thus tearing the flexible circuit board

[0004] Although, figure 1 The arc transition at the middle mark 1 can reduce the possibility of the flexible circuit board being torn to a certain extent. However, when the flexible circuit board of this shape is bent, the flexibility of the flexible circuit board is not high.

For example, point 3 and point 4 are fixed, and point 2 is bent towards point 3. The part driven by the bending can only be bent to the arc of mark 1. If it continues to point 2 to point 3 Bending, the sign 1 will be pulled, causing tearing

In the same way, points 3 and 2 are fixed, and point 4 is bent towards point 3. The mobility is also not high, and the bending area is limited

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