FPC flat cable

Abstract

The utility model provides a flexible printed circuit (FPC) flat cable, which comprises an FPC layer provided with a plurality of flat conductors in parallel, and two sides of the FPC layer are provided with wire ports. Insulating layers are attached to the front and back surfaces of the FPC layer, the front surfaces of the wired ports are not covered by the insulating layers, and the back surfaces of the wired ports are covered by the insulating layers; and a woven mesh is coated outside the insulating layer. External force is dispersed through a high-density fiber structure of the woven mesh, and the risk that friction directly acts on the FPC layer is reduced, so that the service life is prolonged; and the flexible characteristic of the woven mesh allows the flat cable to bend along with the moving part without generating internal stress concentration, so that the probability of wire breakage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to FPC technical field, especially a kind of FPC wire harness. BACKGROUND

[0002] Wire harness, also called flexible printed circuit (FPC), is used for data transmission in movable components and movable areas, such as data lines connecting hard disk and optical drive in computer internal mainboard, data lines connecting display screen in mobile phone mainboard, and data lines connecting devices.

[0003] The current FPC wire harness, without protective layer, is easily damaged and has a short service life when used in movable components or components that need to move with movable components. Therefore, the present application proposes an FPC wire harness to at least partially solve the problems in the prior art. SUMMARY

[0004] In view of the above problems, the utility model is proposed to provide an FPC wire harness that overcomes the above problems or at least partially solves the above problems.

[0005] To solve the above problems, the utility model discloses an FPC wire harness, comprising:

[0006] The FPC layer with a plurality of flat conductors arranged in parallel has wire ports on both sides;

[0007] The FPC layer has an insulating layer on both sides, and the front side of the wire port is not covered by the insulating layer, while the back side is covered by the insulating layer;

[0008] The insulating layer is coated with a woven mesh.

[0009] Preferably, the two ends of the woven mesh are also coated with acetate cloth.

[0010] Preferably, the middle part of the FPC layer and the insulating layer is divided into a plurality of parts arranged in superposition along the conductor direction, and a silica gel tube is sleeved at the superposition position.

[0011] Preferably, the wire ports at both ends of the FPC layer are opposite to each other, and the back side of the wire port is covered by the insulating layer.

[0012] Preferably, the back side of the wire port is also provided with a reinforcing plate with a length not less than that of the wire port.

[0013] Preferably, the reinforcing plate is a steel sheet.

[0014] Preferably, the flat conductor is a tinned conductor.

[0015] Preferably, the conductor at the wire port position has a gold plating layer.

[0016] The utility model discloses the following advantages:

[0017] Through the FPC layer that a plurality of flat conductor is arranged in parallel, its both sides are equipped with wire port, the positive and negative of FPC layer is attached and is equipped with insulating layer, and the positive of wire port is not covered by insulating layer, and its back is covered by insulating layer, and the insulating layer is covered with braided mesh. The high density fiber structure of braided mesh disperses external force, reduces the risk of friction direct action on FPC layer, thereby prolongs life, and the flexible characteristic of braided mesh allows the flexible cord to bend with the movable member and does not produce internal stress concentration, thereby reduces the probability of wire breakage. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the drawing used in the embodiment needed to make a simple introduction, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0019] Figure 1 It is the basic structure schematic diagram of FPC flexible cord provided in the embodiment of the utility model;

[0020] Figure 2 It is the front structure schematic diagram of FPC flexible cord provided in the embodiment of the utility model;

[0021] Figure 3 It is the complete structure schematic diagram of FPC flexible cord provided in the embodiment of the utility model.

[0022] In the drawing: 101, FPC layer;102, insulating layer;103, wire port;104, reinforcing plate;105, braided mesh;106, acetate cloth;107, silica gel tube. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clearly, the following will be combined with the drawing in the embodiment of the utility model, and the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiments;The components of the embodiment of the utility model described and shown in the drawing here can be arranged and designed in various different configurations.

[0024] The following detailed description of some embodiments of the present application will be made in conjunction with the drawings. In the case of no conflict, each of the following embodiments and each feature in the embodiments can be combined with each other.

[0025] Please refer to Figure 1-3 The utility model discloses an FPC flat cable, which comprises an FPC layer 101 provided with a plurality of flat conductors arranged in parallel, and wire ports 103 arranged on both sides of the FPC layer 101; the front and back surfaces of the FPC layer 101 are attached with an insulating layer 102, and the front surface of the wire port 103 is not covered by the insulating layer 102, while the back surface is covered by the insulating layer 102; and the insulating layer 102 is wrapped with a woven mesh 105.

[0026] In the present application, the two wire ports 103 can have better electrical connection through the parallel arrangement of the flat conductors; the insulating layer 102 is arranged on both surfaces of the FPC layer 101 to realize insulation in the non-connection area and avoid the risk of conductor delamination and short circuit during bending; the woven mesh 105 is wrapped outside the insulating layer 102 as a core protection layer to solve the problems of friction and impact in dynamic scenarios. The woven mesh 105 disperses external force through a high-density fiber structure to reduce the risk of friction directly acting on the FPC layer 101, thereby prolonging the service life; the flexible nature of the woven mesh 105 allows the flat cable to bend with the moving part without causing internal stress concentration, thereby reducing the probability of wire breakage.

[0027] As a preferred embodiment, the two ends of the woven mesh 105 are further wrapped with acetate cloth 106. The woven mesh 105 is wrapped with acetate cloth 106 at the end; the end of the woven mesh 105 in contact with the device interface (i.e., the rear end position of the wire port 103) is wrapped with acetate cloth 106 tape. Since the acetate cloth 106 is resistant to high temperature and flexible, it prevents the woven mesh 105 from scattering due to long-term loosening, improves the sealing of the end, and prevents the woven mesh 105 from easily scattering or being torn.

[0028] The middle part of the FPC layer 101 and the insulating layer 102 is divided into a plurality of parts arranged in superposition along the conductor direction, and a silica gel tube 107 is sleeved at the superposition position. By dividing the conductor and sleeving the silica gel tube 107, for example, the middle part of the FPC layer 101 is divided into 2-3 independent branches along the conductor direction, and the silica gel tube 107 is sleeved after superposition, for example, the two ends of the above-mentioned FPC flat cable are divided into 3 strands, each strand contains 7 wires, and the wires are divided into 7 / 7 / 7, the middle part is wrapped with a 0.15T*6W*74L woven mesh, and a 12-18mm long silica gel tube can be sleeved. By segmenting, the overall rigidity can be reduced, and the silica gel tube 107 can further absorb vibration energy, which is particularly suitable for high-frequency oscillation scenarios (such as robot joints), and can further improve the strength of the FPC. The wire ports 103 at the two ends of the FPC layer 101 are opposite to each other; and the back surface of the wire port 103 is covered by the insulating layer 102. The wire ports 103 are designed to be opposite to each other, so that the wire ports 103 on both sides are located on the front and back surfaces of the FPC layer 101, respectively, and form a staggered layout when wiring. This design avoids the thickness accumulation caused by the wire ports on both sides being on the same surface, and facilitates wiring in narrow spaces.

[0029] As a preferred embodiment, the back of the wire port 103 is also attached with a reinforcing plate 104 with a length not less than that of the wire port 103. A 0.1-0.205 mm thick steel sheet reinforcing plate 104 is attached to the back of the wire port 103, which can inhibit the risk of delamination of the board during plugging and improve the reliability of the connector plugging.

[0030] Further, the reinforcing plate 104 is a steel sheet, for example, a 304 stainless steel sheet is used as the reinforcing plate 104, and the surface is sandblasted. The stainless steel has both strength and corrosion resistance, and is suitable for humid or acidic and alkaline environments.

[0031] Further, the dry flat conductor is a tinned conductor. The conductor is tinned, for example, the surface is electroplated with a 3 μm thick tin layer, which can improve the oxidation resistance and reduce the contact resistance between conductors, and is suitable for use in high humidity environments. The conductor at the position of the wire port 103 has a gold plating layer, specifically, the conductor plating layer at the wire port 103 is upgraded to a 1 μm thick hard gold layer. This can improve the plugging durability (wear resistance > 10,000 times) and improve the stability of high-frequency signal transmission.

[0032] In this application, through the multi-layer protection architecture (insulation layer + woven mesh + reinforcing plate), combined with dynamic adaptability design (silicone tube, segmented conductor), a gradient protection structure is formed. The surface woven mesh 105 resists macroscopic physical friction; the middle layer insulation layer blocks electrical damage; and the bottom layer reinforcing plate suppresses microscopic structural fatigue. It can not only be applied to the wire of the folding screen mobile phone rotating shaft area, but also to the internal wire harness of industrial robot arms, and can also improve the service life to more than 3 times that of traditional products (actual measurement > 500,000 times of bending).

[0033] Finally, it should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or terminal device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of another identical element in the process, method, article or terminal device including the element.

[0034] The above has carried out the detailed introduction to the FPC wire of the utility model, the principle and implementation mode of the utility model have been described in this paper by applying specific examples, the above embodiment is only used for helping understanding the method and core idea of the utility model; simultaneously, for the general technical personnel in the field, according to the idea of the utility model, there will be changes in specific implementation mode and application range, and the above-mentioned, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. An FPC cable, characterized in that, include: An FPC layer (101) with several flat conductors arranged in parallel has wire openings (103) on both sides. An insulating layer (102) is attached to both the front and back sides of the FPC layer (101), and the front side of the wire port (103) is not covered by the insulating layer (102), while its back side is covered by the insulating layer (102). The insulating layer (102) is covered with a woven mesh (105).

2. The FPC cable according to claim 1, characterized in that, The two ends of the woven mesh (105) are also covered with acetate cloth (106).

3. The FPC cable according to claim 2, characterized in that, The middle part of the FPC layer (101) and the insulating layer (102) is divided into multiple overlapping parts along the conductor direction, and a silicone tube (107) is sleeved at the overlapping position.

4. The FPC cable according to claim 1, characterized in that, The wire ports (103) at both ends of the FPC layer (101) are opposite to each other; and the back side of the wire ports (103) is covered by an insulating layer (102).

5. The FPC cable according to claim 4, characterized in that, A reinforcing plate (104) with a length not less than that of the wire opening (103) is also attached to the back of the wire opening (103).

6. The FPC cable according to claim 5, characterized in that, The reinforcing plate (104) is a steel sheet.

7. The FPC cable according to claim 1, characterized in that, The dry flat conductor is a tin-plated conductor.

8. The FPC cable according to claim 7, characterized in that, The conductor at the wire port (103) has a gold-plated layer.

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