Anti-tearing FPC

Abstract

The utility model relates to the technical field of flexible circuit boards, in particular to an anti-tear FPC (Flexible Printed Circuit), which comprises a flexible circuit board body, a first joint and a second joint are respectively connected to the head side and the tail side of the flexible circuit board body, and the flexible circuit board body is connected to each device or a display screen end through the first joint and the second joint. The flexible circuit board comprises a flexible circuit board body, the outer side of the edge of the flexible circuit board body is fixedly connected with a connecting strip, the outer side of each connecting strip is tightly sleeved with a straight connecting piece, the corner of the outer side of the flexible circuit board body is fixedly connected with a corner connecting piece, and a flexible bending sensor is embedded in the flexible circuit board body. As the edge of the flexible circuit board is provided with the connecting strip, the straight connecting piece and the corner connecting piece, the force applied to the edge of the original flexible circuit board can be transferred to the structure, the risk of tearing caused by long-term bending force applied to the edge is avoided, and the purpose of preventing tearing is further achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible printed circuit boards, and specifically relates to an anti-tear FPC. Background Art

[0002] A flexible printed circuit board is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film, and has the characteristics of high wiring density, light weight, thin thickness, and good bendability. The flexible printed circuit board is favored for its excellent characteristics such as light weight, thin thickness, and free bending and folding.

[0003] After retrieval, a flexible printed circuit board with a bending protection structure is mentioned in the publication number CN213694290U, which includes a flexible printed circuit board body. Two strip-shaped elastic pieces are in movable contact with the bottom of the flexible printed circuit board body. L-shaped blocks are arranged on both sides of the flexible printed circuit board body, and the two L-shaped blocks are symmetrically arranged. The bottom of the flexible printed circuit board body is in movable contact with the inner walls of the bottoms of the two L-shaped blocks. The two strip-shaped elastic pieces are fixedly embedded in the left side of the L-shaped block on the right side of the two L-shaped blocks. The L-shaped block on the left side is movably sleeved on the two strip-shaped elastic pieces, and a rectangular groove is opened at the top of the L-shaped block. The utility model has reasonable design, is convenient for bending protection of the flexible printed circuit board body, reduces the damage risk of over-bending and folding, and is convenient for adjusting according to flexible printed circuit board bodies with different lengths and thicknesses, so as to be able to quickly install flexible printed circuit board bodies with different thicknesses and lengths, improve the applicable range, and meet the use requirements.

[0004] Although the above solution solves the problems mentioned in the background art, there are still the following deficiencies: If the above flexible printed circuit board is bent multiple times during use, fine cracks are likely to occur on the flexible printed circuit board, especially at the edges, which will then cause the internal circuits of the circuit board to break. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-tear FPC to protect the edge of the flexible printed circuit board and avoid tearing at the edge, so as to solve the problems mentioned in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An anti - tear FPC includes a flexible printed circuit board body. First connectors and second connectors are respectively connected to the head and tail sides of the flexible printed circuit board body, and the flexible printed circuit board body is connected to each device or display end through the first connectors and the second connectors. Connecting strips are fixedly connected to the outer sides of the edges of the flexible printed circuit board body. Straight connectors are tightly sleeved and installed on the outer sides of each connecting strip. A corner connector is fixedly connected to the outer corner of the flexible printed circuit board body. A flexible bending sensor is also embedded and installed inside the flexible printed circuit board body.

[0008] As a preferred solution of the present utility model, the connecting strip is fixedly connected to the outer side of the edge of the flexible printed circuit board body, and its thickness is less than that of the flexible printed circuit board body. A second connection hole is also provided on the connecting strip.

[0009] As a preferred solution of the present utility model, a concave groove body is provided inside the straight connector, and it is hermetically connected to the outer side of the connecting strip through this concave groove body. A first connection hole is also provided on the straight connector. The straight connector and the connecting strip are tightly fixed by inserting a locking rivet through the first connection hole and the second connection hole.

[0010] As a preferred solution of the present utility model, the corner connector adopts an arc structure matching the corner of the flexible printed circuit board body. A concave groove body matching the connecting strip is provided inside it, and a third connection hole is provided on it. The third connection hole on the corner connector is plugged with other second connection holes on the connecting strips on both sides by using a locking rivet.

[0011] As a preferred solution of the present utility model, both the connecting strip and the straight connector are made of high - strength flexible materials.

[0012] As a preferred solution of the present utility model, the flexible bending sensor is electrically welded to the flexible printed circuit board body through a circuit for detecting the bending degree of the flexible printed circuit board body.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] In the present utility model, by providing an anti - tear FPC, when using this anti - tear FPC, since connecting strips, straight connectors, and corner connectors are provided at the edges of the flexible printed circuit board, and both the connecting strip and the straight connector are made of high - strength flexible materials, the force originally received at the edge of the flexible printed circuit board can be transferred to this structure, avoiding the risk of tearing caused by long - term bending force at the edge, and thus achieving the purpose of anti - tearing. Description of the Drawings

[0015] Figure 1 It is a three - dimensional structure schematic diagram of the whole of the present utility model;

[0016] Figure 2 is Figure 1 The three-dimensional structural schematic diagram after the removal of the straight connector;

[0017] Figure 3 is Figure 1 The three-dimensional structural schematic diagram of the decomposition of the flexible circuit board body and its local interior;

[0018] Figure 4 is the three-dimensional structural schematic diagram of the corner connector of the present utility model;

[0019] Figure 5 is the three-dimensional structural schematic diagram of the straight connector of the present utility model.

[0020] In the figure: 1. Flexible circuit board body; 2. First joint; 3. Second joint; 4. Connecting strip; 5. Straight connector; 6. Corner connector; 7. Flexible bending sensor; 8. Second connection hole; 9. First connection hole; 10. Third connection hole. Specific embodiments

[0021] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0022] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] For the embodiments, please refer to Figures 1-5 , this utility model provides a technical solution:

[0026] A tear-resistant FPC includes a flexible printed circuit board body 1. First connectors 2 and second connectors 3 are respectively connected to both the head and tail sides of the flexible printed circuit board body 1, and the flexible printed circuit board body 1 is connected to each device or display end through the first connectors 2 and second connectors 3. Connection strips 4 are fixedly connected to the outer sides of the edges of the flexible printed circuit board body 1. A straight connector 5 is tightly sleeved and installed on the outer side of each connection strip 4. A corner connector 6 is fixedly connected to the outer corner of the flexible printed circuit board body 1. A flexible bending sensor 7 is also embedded and installed inside the flexible printed circuit board body 1.

[0027] Among them, the connection strip 4 is fixedly connected to the outer side of the edge of the flexible printed circuit board body 1, and its thickness is less than that of the flexible printed circuit board body 1. A second connection hole 8 is also provided on the connection strip 4. A concave groove is provided inside the straight connector 5, and it is hermetically connected to the outer side of the connection strip 4 through this concave groove. A first connection hole 9 is also provided on the straight connector 5. The straight connector 5 and the connection strip 4 are tightly fixed by inserting a locking rivet through the first connection hole 9 and the second connection hole 8. The corner connector 6 adopts an arc structure matching the corner of the flexible printed circuit board body 1. A concave groove matching the connection strip 4 is provided inside it, and a third connection hole 10 is provided on it. The third connection hole 10 on the corner connector 6 is inserted with the second connection holes 8 on the other connection strips 4 on both sides by using a locking rivet. The connection strip 4 and the straight connector 5 are both made of high-strength flexible materials. By sleeving and installing the straight connector 5 on the outer side of the corresponding connection strip 4 and locking and fixing it with a rivet, at the same time, installing the corner connector 6 at the corner of the flexible printed circuit board body 1 and also locking and fixing it with a rivet. Since the connection strip 4 and the straight connector 5 are both made of high-strength flexible materials, it is used to bear the force originally received at the edge of the flexible printed circuit board, so as to achieve the purpose of preventing tearing.

[0028] Among them, the flexible bending sensor 7 is electrically welded to the flexible circuit board body 1 through a circuit, and is used to detect the bending degree of the flexible circuit board body 1. Moreover, the flexible bending sensor 7 can also be connected to an external alarm lamp; by detecting the bending degree of the flexible circuit board body 1 through the flexible bending sensor 7, after excessive bending, an alarm prompt is given through the alarm lamp, which can also avoid tearing caused by excessive bending.

[0029] The working process of the present utility model: When using this tear-proof FPC, the straight connector 5 is sleeved and installed outside the corresponding connecting strip 4, and is locked and fixed by using rivets. At the same time, the corner connector 6 is installed at the corner of the flexible circuit board body 1, and is also locked and fixed by using rivets. Since the connecting strip 4 and the straight connector 5 are both made of high-strength flexible materials, they are used to bear the force received at the edge of the original flexible circuit board, so as to achieve the purpose of preventing tearing; during the daily use of the circuit board, the bending degree of the flexible circuit board body 1 is detected through the flexible bending sensor 7. After excessive bending, an alarm prompt is given through the alarm lamp, which can also avoid tearing caused by excessive bending.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tear-resistant FPC, comprising a flexible circuit board body (1), characterized in that: The first connector (2) and the second connector (3) are respectively connected to the head and tail sides of the flexible circuit board body (1), and the flexible circuit board body (1) is connected to various devices or display screen ends through the first connector (2) and the second connector (3). The outer side of the edge of the flexible circuit board body (1) is fixedly connected with a connecting strip (4), and the outer side of each connecting strip (4) is tightly fitted with a straight connecting piece (5). A corner connecting piece (6) is fixedly connected at the outer corner of the flexible circuit board body (1), and a flexible bending sensor (7) is also embedded and installed inside the flexible circuit board body (1).

2. The tear-resistant FPC according to claim 1, characterized in that: The connecting strip (4) is fixedly connected to the outer side of the edge of the flexible circuit board body (1), and its thickness is less than the thickness of the flexible circuit board body (1). A second connecting hole (8) is also provided on the connecting strip (4).

3. The tear-resistant FPC according to claim 1, characterized in that: The straight connecting piece (5) is provided with a concave groove body inside, and a sealing connection is achieved through the concave groove body and the outer side of the connecting strip (4). A first connecting hole (9) is also provided on the straight connecting piece (5), and the straight connecting piece (5) and the connecting strip (4) are fastened and fixed by means of locking rivets passing through the first connecting hole (9) and the second connecting hole (8).

4. The tear-resistant FPC according to claim 1, characterized in that: The corner connector (6) adopts an arc-shaped structure that matches the corner of the flexible circuit board body (1), and has a concave groove body that matches the connecting strip (4) inside, and a third connecting hole (10) is opened on it. The third connecting hole (10) on the corner connector (6) adopts a locking rivet to be plugged with other second connecting holes (8) on the connecting strips (4) on both sides.

5. The tear-resistant FPC according to claim 1, characterized in that: The connecting strip (4) and the straight connecting piece (5) are both made of high-strength flexible material.

6. The tear-resistant FPC according to claim 1, characterized in that: The flexible bending sensor (7) is electrically welded to the flexible circuit board body (1) through a circuit, and is used to detect the bending condition of the flexible circuit board body (1).

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