Flexible circuit board tear-resistant structure

Abstract

The utility model discloses an anti-tear structure for a flexible circuit board, comprising a flexible circuit board body, wherein an arc chamfer is arranged at the inner corner of the edge of the flexible circuit board body, and an anti-tear reinforcement rib is arranged on the flexible circuit board body near the arc chamfer, wherein the anti-tear reinforcement rib is a copper foil; the utility model changes the right-angle structure shape at the inner corner of the edge of a traditional flexible circuit board, so that an arc chamfer is formed at the inner corner of the edge of the flexible circuit board to reduce the possibility of tearing, and at the same time, an anti-tear reinforcement rib is arranged on the flexible circuit board near the arc chamfer, and the anti-tear reinforcement rib is used to increase the structural strength of the inner corner of the edge of the flexible circuit board, thereby further improving the tear resistance.

Description

Technical Field

[0001] The utility model relates to an anti-tearing structure for a flexible circuit board, belonging to the technical field of flexible circuit boards. Background Art

[0002] Flexible Printed Circuit (FPC) is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as the substrate. It has the characteristics of high wiring density, light weight, thin thickness and good bendability. FPC is one of the important electronic components in the electronics industry. As electronic products continue to develop in the direction of thinness, smallness and precision, the application of FPC is becoming more and more extensive. FPC is a printed circuit made of a flexible insulating substrate, which can provide excellent electrical properties and meet the design requirements of smaller and higher density installation. It can be bent, wound and folded freely, and can withstand millions of dynamic bending without damaging the wires. FPC products are widely used in liquid crystal displays, electronic products, automobiles and other fields.

[0003] The FPC body is generally very thin and light. The FPC plug-in end matches the corresponding connector. It is generally made into the corresponding Pin width according to the specifications of the product-side connector. The FPC line body position comprehensively considers the impedance requirements, volume size, substrate utilization, etc. The FPC plug-in end is indented at the transition to the FPC line body position to form a 90-degree right angle (female angle) edge, such as Figure 2 As shown, since there is only a covering film but no copper foil substrate at the right angle, the right angle is prone to tearing during the use of the FPC, causing damage to the FPC. Utility Model Content

[0004] The utility model aims to provide a flexible circuit board anti-tearing structure to solve the defects of the flexible circuit board FPC in the prior art.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The flexible circuit board tear-proof structure comprises a flexible circuit board body, wherein an arc chamfer is arranged at the inner corner of the edge of the flexible circuit board body, and an anti-tear reinforcement rib is arranged on the flexible circuit board body near the arc chamfer, wherein the anti-tear reinforcement rib is copper foil.

[0007] As a preferred embodiment of the present invention, the anti-tear reinforcement rib is arranged in the interlayer of the flexible circuit board body.

[0008] As a preferred embodiment of the present invention, the anti-tear reinforcement rib extends along the edge of the circular chamfer, and the anti-tear reinforcement rib has an arc structure consistent with the arc of the circular chamfer.

[0009] As a preferred embodiment of the present invention, the width of the anti-tear reinforcement rib is at least 3 mm.

[0010] As a preferred embodiment of the present invention, the thickness of the anti-tear reinforcement rib is 0.2-0.5 mm.

[0011] The utility model is beneficial in that:

[0012] The right-angle structure shape at the inner corner of the edge of the traditional flexible circuit board is changed to form a circular arc chamfer at the inner corner of the edge of the flexible circuit board to reduce the possibility of tearing. At the same time, anti-tear reinforcement ribs are arranged on the flexible circuit board near the circular arc chamfer. The anti-tear reinforcement ribs are used to increase the structural strength of the inner corner of the edge of the flexible circuit board, thereby further improving the tear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of a traditional flexible circuit board.

[0015] Meaning of the reference numerals in the figures:

[0016] 1-Flexible circuit board body, 2-Arc chamfer, 3-Anti-tear reinforcement ribs. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 As shown, this embodiment is a flexible circuit board anti-tear structure, including a flexible circuit board body 1, an arc chamfer 2 is arranged at the edge corner of the flexible circuit board body 1, and an anti-tear reinforcement rib 3 is arranged on the flexible circuit board body 1 near the arc chamfer 2.

[0019] In this embodiment, the anti-tear reinforcement rib 3 is copper foil, and the anti-tear reinforcement rib 3 is arranged in the interlayer of the flexible circuit board body 1, and is pressed together by the upper and lower covering films of the flexible circuit board body 1; the anti-tear reinforcement rib 3 extends along the edge of the arc chamfer 2, and the anti-tear reinforcement rib 3 has an arc structure consistent with the arc chamfer 2.

[0020] In this embodiment, the width of the anti-tear reinforcement rib 3 is 3 mm. In practical applications, the width of the anti-tear reinforcement rib 3 can also be appropriately increased according to actual conditions, for example, increased to 4 mm or 5 mm.

[0021] In this embodiment, the thickness of the anti-tear reinforcement rib 3 is 0.4 mm; in actual application, the thickness of the anti-tear reinforcement rib 3 can also be appropriately increased or decreased according to actual conditions, for example: increased to 0.5 mm, or decreased to 0.2 mm, 0.3 mm.

[0022] This embodiment changes the right-angle structure shape at the inner corner of the edge of the traditional flexible circuit board, so that the inner corner of the edge of the flexible circuit board is formed with a circular arc chamfer to reduce the possibility of tearing. At the same time, anti-tear reinforcement ribs are arranged on the flexible circuit board near the circular arc chamfer, and the anti-tear reinforcement ribs are used to increase the structural strength of the inner corner of the edge of the flexible circuit board, thereby further improving the tear resistance.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A flexible circuit board tear-proof structure, comprising a flexible circuit board body, characterized in that: An arc chamfer is arranged at the inner corner of the edge of the flexible circuit board body, and an anti-tear reinforcement rib is arranged on the flexible circuit board body near the arc chamfer, and the anti-tear reinforcement rib is copper foil.

2. The flexible circuit board tear-proof structure according to claim 1, characterized in that: The anti-tear reinforcement rib is arranged in the interlayer of the flexible circuit board body.

3. The flexible circuit board anti-tearing structure according to claim 1 or 2, characterized in that: The tear-resistant reinforcement ribs extend along the edge of the circular chamfer, and the tear-resistant reinforcement ribs have a circular arc structure consistent with the arc of the circular chamfer.

4. The flexible circuit board tear-proof structure according to claim 3, characterized in that: The width of the tear-resistant reinforcement rib is at least 3 mm.

5. The flexible circuit board tear-proof structure according to claim 3, characterized in that: The thickness of the anti-tear reinforcement rib is 0.2-0.5 mm.

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