Improved data transmission shielding flexible flat cable

Abstract

The utility model provides an improved data transmission shielding flexible flat cable, which is used for reducing the radiation disturbance problem of internal interconnection wires of products such as cameras and the like. The cable comprises a cable layer, wherein a plurality of cables are arranged in the cable layer; a grid copper sheet is also included; in the cable layer, the ground signal cables of the adjacent pins are combined and routed, and the power signal cables of the adjacent pins are combined and routed; the cable layer is covered with an electromagnetic shielding film; the grid copper sheet is fixed at the bottom of the cable layer; a ground signal cable in the cable layer is connected to the grid copper sheet, so that the attribute of the grid copper sheet is defined as ground, and a ground plane is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to an improved data transmission shielding flexible flat cable applied to a digital video camera and also applied to other audio and video, information technology and communication technology equipment. BACKGROUND

[0002] In the existing digital video camera, many circuit boards are contained in the interior due to structural appearance and other considerations, including a lens Sensor board, a lens motor driving board, a main board, a front Mic board, a rear Mic board, an LED lamp board and the like, and many interconnecting wires are required in the interior of the product. With the increasing attention of customers to electromagnetic compatibility (EMC) and the extensive demand of various domestic and foreign certifications, the radiation problem caused by the interior wires of the product is increasingly prominent, and the flexible flat cable commonly used in the existing camera product is used for power supply communication between the main board and other various functional circuit boards, the difference parameters of various wires are only wire length and pin number, and the shielding effect is completely absent. SUMMARY

[0003] The utility model discloses a kind of improved data transmission shielding flexible flat cables with reasonable structure design, to reduce the radiation disturbance problem of interconnecting wires in the interior of camera and the like.

[0004] The utility model discloses the technical scheme for solving above-mentioned problem is: improved data transmission shielding flexible flat cable, including cable layer, be provided with multiple cable in cable layer;Its characterized in that: still include grid copper sheet;In cable layer, the ground signal cable of adjacent pin is merged and is wired, and the power signal cable of adjacent pin is merged and is wired;The cable layer is covered with electromagnetic shielding film;Grid copper sheet is fixed in the bottom of cable layer;Ground signal cable in cable layer is connected to grid copper sheet, so that grid copper sheet attribute definition is ground, forms ground plane.

[0005] The utility model discloses the both ends of cable layer are provided with the terminal of connection.

[0006] The utility model discloses the cable is arranged in parallel with the mode of wiring.

[0007] The utility model discloses the electromagnetic shielding film adopts silver paste film.

[0008] The utility model discloses the silk print text is set on cable layer.

[0009] The utility model discloses the grid copper sheet, and the hollow grid is formed by copper wire cross wiring.

[0010] Compared with the prior art, the utility model has the following advantages and effects:

[0011] The utility model discloses a kind of cable layers and grid copper sheets, which can reduce the radiation disturbance problem of internal interconnection wire of camera and other products, and also improve the anti-interference ability of product, such as electrostatic discharge immunity (ESD), radiation disturbance immunity (RS) and the like.The line material provided by the utility model has a little increase in line material cost (more than 1 yuan than commonly used flexible flat cable (FFC)), but the electromagnetic compatibility of product is improved, and the convenience of flexible flat cable installation is also maintained.In addition, compared with FFC line material, electromagnetic shielding film and grid copper sheet are added, and the improvement of line material hardness also improves the tensile resistance of line material. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of cable layer of the utility model embodiment.

[0013] Figure 2 It is the structure schematic diagram of grid copper sheet of the utility model embodiment. DETAILED DESCRIPTION

[0014] The utility model will be further explained in detail by combining with drawings and through embodiment, and the following embodiment is the explanation of the utility model, and the utility model is not limited to the following embodiment.

[0015] The utility model embodiment includes cable layer 1 and grid copper sheet 2.

[0016] Cable layer 1 is located at the front of flexible flat cable, and the both ends of cable layer 1 are provided with terminal 3 for connection, and terminal 3 still uses the terminal of commonly used flexible flat cable.Multiple cables are provided in cable layer 1, and these cables are arranged in parallel.In this embodiment, the actual installation position of two interconnection circuit boards, the pin number of connector and the pin pitch are needed to be known first, which are used to determine the length, pin number and line pitch of flexible flat cable, which is the same as commonly used FFC line;the pin definition of interconnection circuit board is checked, and ground signal or power signal is marked.In cable layer 1, for adjacent pin ground signal cable or power signal cable, ground signal cable or power signal cable is thickened or combined, and combined wire is used instead of commonly used flexible flat cable parallel wire, and the gap between two parallel wires is used, and the width of actual ground line or power line is increased, and current flow can also be increased.

[0017] Electromagnetic shielding film is covered on cable layer 1, and the radiation leakage of cable layer 1 is shielded, and the influence of external electromagnetic interference on line material is reduced.Silver paste film is used for electromagnetic shielding film.

[0018] The grid copper sheet 2 is located on the back of the flexible flat cable and is fixed on the bottom of the cable layer 1. The ground signal cable in the cable layer 1 is connected to the grid copper sheet 2 through punching, so that the grid copper sheet 2 is defined as ground, and a ground plane is formed. The grid copper sheet 2 can well absorb the radiation in the transmission process of the wire, and provide a good interference discharge path for various functional boards when receiving external interference such as electrostatic discharge, and provide a low-impedance loop for signal transmission, while forming a certain space with the ground signal line, wrapping the data or power signal line of the cable layer 1. In the grid copper sheet 2, the copper wire is cross-connected to form a hollow grid, instead of a full solid copper plane, in order to maintain the flexibility of the wire, so that it is consistent with the commonly used flexible flat cable during actual installation.

[0019] The cable layer 1 is provided with silk screen text for prompting the direction of the assembler during actual insertion of the flat cable.

[0020] During use, the silk screen text is checked for prompting, and the two ends of the wire are respectively inserted into the corresponding seats of the functional circuit board and the main board or other circuit boards according to the direction. The clock signal, data signal, power signal and other signals transmitted by each functional single board can absorb part of the radiation leakage on the transmission path through the improvement of the utility model, and can be compared through spectrum analyzer and actual anechoic chamber test.

[0021] In addition, it should be noted that the specific embodiments described in the specification, the shape of the components, the name taken, etc. can be different, and the above description in the specification is only an example of the structure of the utility model. Any equivalent changes or simple changes made according to the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent.

Claims

1. An improved data transmission shielded flexible flat cable, comprising a cable layer in which a plurality of cables are arranged; characterized in that: It also includes a grid copper sheet; in the cable layer, the ground signal cable of adjacent pins is merged and wired, and the power signal cable of adjacent pins is merged and wired; the cable layer is covered with an electromagnetic shielding film; the grid copper sheet is fixed at the bottom of the cable layer; the ground signal cable in the cable layer is connected to the grid copper sheet, so that the grid copper sheet is defined as ground, forming a ground plane.

2. The improved data transmission shielded flexible flat cable of claim 1, wherein: The cable layer is provided with terminals for connection at both ends.

3. The improved data transmission shielded flexible flat cable of claim 1, wherein: The cable is arranged in a parallel wiring manner.

4. The improved data transmission shielded flexible flat cable of claim 1, wherein: The electromagnetic shielding film adopts a silver paste film.

5. The improved data transmission shielded flexible flat cable of claim 1, wherein: Silk screen printing is provided on the cable layer.

6. The improved data transmission shielded flexible flat cable of claim 1, wherein: In the grid copper sheet, the hollow grid is formed by cross wiring of copper wires.

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