CN210006494U

CN210006494U - kinds of flexible flat cable

Info

Publication number: CN210006494U
Application number: CN201920655259.8U
Authority: CN
Inventors: 王智勇; 张发明
Original assignee: Hefei Huike Jinyang Technology Co Ltd
Current assignee: Hefei Huike Jinyang Technology Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-01-31
Anticipated expiration: 2029-05-08

Abstract

The utility model is suitable for the technical field of electronic equipment, and provides flexible flat cables, including flexible flat cable body, Maila insulating layer and set up in flexible flat cable body with the aluminium foil Maila between the Maila insulating layer covers flexible flat cable through the aluminium foil Maila, realizes the shielding of communication cable to signal interference to impedance mismatch problem in the use has been avoided, the problem that shielding noise point can appear or cross striation interference appears when current flexible flat cable carries out the electromagnetic shield has been solved.

Description

kinds of flexible flat cable

Technical Field

The application belongs to the technical field of electronic equipment, in particular to flexible flat cables.

Background

The Flexible Flat Cable (FFC) is a data Cable formed by pressing PET insulating materials and extremely thin tinned Flat copper wires, and has the advantages of softness, random bending and folding, thin thickness, small volume, simple connection, convenient disassembly and easy solution to electromagnetic shielding (EMI).

Currently, the flexible flat cable is electromagnetically shielded by attaching aluminum foil and conductive cloth to its surface, however, this shielding method often causes noise or interference of cross-stripes.

SUMMERY OF THE UTILITY MODEL

The utility model provides an aim at provides kinds of flexible flat cable, can appear shielding noise point or the problem that the cross striation disturbed when aiming at solving present flexible flat cable and carrying out the electromagnetic shield.

The embodiment of the application provides flexible flat cables, include:

a flexible flat cable body;

the th surface of the flexible flat cable body is provided with an aluminum foil mylar;

and a mylar insulating layer is arranged on the surface of the aluminum foil mylar.

Optionally, the flexible flat cable body includes:

a lead group consisting of a plurality of leads and an th insulating layer covering the lead group.

Optionally, the lead set includes at least ground wires;

the aluminum foil mylar is electrically connected with the grounding wire.

Optionally, the plurality of wires are copper wires.

Optionally, the diameter of the copper wire is greater than 0.5 mm.

Optionally, the th end of the flexible flat cable body is provided with a th signal interface, and the second end of the flexible flat cable body is provided with a second signal interface.

Optionally, the flexible flat cable body includes: a lead group composed of a plurality of leads;

the th signal interface is provided with a plurality of th signal pins corresponding to a plurality of wires in the wire group;

the second signal interface is provided with a plurality of second signal pins corresponding to the plurality of wires in the wire group.

Optionally, the th signal interface or the second signal interface is provided with a metal ground terminal;

the aluminum foil mylar is connected with the metal grounding end.

Optionally, the mylar insulating layer is a mylar film.

Optionally, a foam adhesive tape with a preset thickness is arranged at the corner of the flexible flat cable.

The embodiment of the application provides flexible flat cables, which comprise a flexible flat cable body, a Mylar insulating layer and an aluminum foil Mylar arranged between the flexible flat cable body and the Mylar insulating layer, wherein the flexible flat cable is covered by the aluminum foil Mylar, so that the shielding of a communication cable on signal interference is realized, the problem of impedance mismatching in the use process is avoided, and the problem that the shielding noise or cross-striation interference occurs when the current flexible flat cable is subjected to electromagnetic shielding is solved.

Drawings

Fig. 1 is a schematic structural view of a flexible flat cable provided by embodiments of the present application;

fig. 2 is a schematic structural view of a flexible flat cable body 10 provided by embodiments of the present application;

fig. 3 is a schematic structural view of a flexible flat cable provided in another embodiments of the present application;

FIG. 4 is a schematic structural diagram of a signal interface 13 provided by embodiments of the present application;

FIG. 5 is a schematic structural diagram of the signal interface 13 provided by embodiments of the present application connected to a flexible flat cable;

fig. 6 is a schematic view of a flexible flat cable according to embodiments of the present application when it is folded;

fig. 7 is an impedance test chart of the flexible flat cable in embodiments of the present application.

Detailed Description

For purposes of making the present application, its objects, aspects and advantages more apparent, the present application is described in further detail with reference to the drawings and the examples.

It should be noted that when an element is referred to as being "secured to" or "disposed on" another elements, it can be directly or indirectly on the other elements, when elements are referred to as being "connected" to the other elements, it can be directly or indirectly connected to the other elements.

In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.

The Flexible Flat Cable (FFC) can select the number of the conducting wires and the distance between the conducting wires at will, so that the connection is more convenient, the volume of the electronic product is greatly reduced, the production cost is reduced, the production efficiency is improved, and the Flexible Flat Cable is most suitable for being used as a data transmission Cable between a mobile component and a main board, between a PCB and the PCB and in miniaturized electrical equipment, at present is widely applied to the connection between a printing head of various printers and the main board, and the signal transmission and the board connection of products such as a plotter, a scanner, a copier, a sound box, a liquid crystal electrical appliance, a fax machine, various video disc machines and the like, and is almost ubiquitous in modern electrical equipment.

In communication signal connection in a display device, a conventional FFC wire shield is generally adopted, however, in the overall display device, although electromagnetic interference can be effectively shielded, shielding noise or cross-striation interference of a display often occurs.

Fig. 1 is a schematic structural diagram of flexible flat cables according to the present application, and referring to fig. 1, the present application provides flexible flat cables including a flexible flat cable body 10, a mylar insulating layer 30, and an aluminum foil mylar 20 disposed between the flexible flat cable body 10 and the mylar insulating layer 30.

In the present embodiment, kinds of flexible flat cables resistant to signal interference are formed by sequentially laminating the flexible flat cable body 10, the aluminum foil mylar 20, and the mylar insulating layer 30.

In applications, for example, in a liquid crystal display, the LVDS interface circuit includes a driver board side LVDS output interface circuit (LVDS transmitter) and a liquid crystal panel side LVDS input interface circuit (LVDS receiver), the LVDS transmitter converts TTL level parallel RGB data signals and control signals output by the driver board main control chip into low voltage serial LVDS signals, and then transmits the signals to the liquid crystal panel side LVDS receiver through a flexible flat cable between the driver board and the liquid crystal panel, and the LVDS receiver converts the serial signals into TTL level parallel signals to be sent to the liquid crystal panel timing control and row-column driving circuit.

In embodiments, the aluminum foil mylar 20 may be covered on any side of the flexible flat cable body 10 by using a back adhesive, wherein another side of the flexible flat cable body 10 may be used for marking parameters such as model, width, etc. of the flexible flat cable, for example, if the flexible flat cable body 10 includes a side and a second side, the aluminum foil mylar 20 is adhered to the side of the flexible flat cable body 10 by the back adhesive, and the second side of the flexible flat cable body 10 is used for marking parameters such as model, width, etc. of the flexible flat cable.

In embodiments, referring to fig. 2, the flexible flat cable body 10 includes a conductor set 11 composed of a plurality of conductors 111 and a insulating layer 12 covering the conductor set.

In the present embodiment, the plurality of wires 111 in the wire group 11 are sequentially arranged, and the th insulating layer 12 wraps the wire group 11 to prevent the wire group 11 from leaking electricity.

In embodiments, the lead set 11 comprises at least ground wires, and the aluminum foil mylar 20 is electrically connected to the ground wires.

In this embodiment, the aluminum foil mylar 20 is connected to the ground line, so that the flexible flat cable in this embodiment can transmit the accumulated electrostatic charges to the ground in time during use, thereby avoiding interference to signals transmitted by the lead group.

In embodiments, the plurality of conductors 111 are copper wires, optionally having a diameter greater than 0.5 mm.

In embodiments, referring to fig. 3, the end of the flexible flat cable body 10 is provided with a signal interface 13, the second end of the flexible flat cable body 10 is provided with a second signal interface, and the structure of the second signal interface is the same as that of the signal interface 13, fig. 4 is a schematic structural view of the signal interface 13 provided in embodiments of the present application, referring to fig. 3 and 4, in this embodiment, the signal interface 13 includes a housing 131 for receiving the flexible flat cable body 10, and locking pieces 132 disposed on both sides of the housing 131, the locking pieces 132 are elastic structures, and the flexible flat cable body 10 placed inside the housing 131 can be fixed by pressing the locking pieces 132 on both sides of the housing 131 inward, the housing 131 further includes a rubber core, a plug pad, and a terminal base, on which a plurality of terminal contact pins are disposed parallel to each other and corresponding to a plurality of conductive wires 111 in the flexible flat cable body 10, and the terminal end of the terminal pin is pressed on the copper flat cable body 10 by itself, so as to electrically connect the flexible flat cable body 10 to the flexible flat cable body .

In embodiments, referring to fig. 3 and 4, the flexible flat cable body 10 includes a lead group 11 composed of a plurality of leads 111, the signal interface 13 is provided with a plurality of signal pins corresponding to the plurality of leads 111 in the lead group, and the second signal interface is provided with a plurality of second signal pins corresponding to the plurality of leads 111 in the lead group.

In embodiments, the signal interface or the second signal interface is provided with a metal ground 110, and the aluminum foil mylar 20 is connected to the metal ground.

In embodiments, the mylar insulating layer 30 may be a mylar film.

In embodiments, as shown in fig. 6, the folding corners 40 of the flexible flat cable are provided with foam tapes 41 with preset thickness.

Fig. 7 is an impedance test chart of the flexible flat cable in embodiments of the present application, and referring to fig. 7, the flexible flat cable in the present embodiment solves the problem of impedance mismatch of TDRs, and simultaneously avoids signal noise and cross-talk interference.

In the present embodiment, the foam tape 41 is used to isolate the flexible flat cable at the break angle, so as to avoid the signal interference caused by the breakage of the aluminum foil mylar 20 due to the break angle during the use of the flexible flat cable, and in another aspect , the foam tape is used to isolate the flexible flat cable at the break angle, so as to avoid the damage of the lead 111 for transmitting signals.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

The flexible flat cables are characterized by comprising a flexible flat cable body, a Mylar insulating layer and an aluminum foil Mylar arranged between the flexible flat cable body and the Mylar insulating layer;

the flexible flat cable body includes:

the lead group comprises a plurality of leads and an th insulating layer covering the leads, wherein the leads comprise at least ground wires;

the aluminum foil mylar is electrically connected with the grounding wire.
2. The flexible flat cable according to claim 1, wherein said plurality of conductive wires are copper wires.
3. The flexible flat cable of claim 2, wherein said copper wires have a diameter greater than 0.5 mm.
4. The flexible flat cable of claim 1, wherein the th end of the flexible flat cable body is provided with a th signal interface and the second end of the flexible flat cable body is provided with a second signal interface.
5. The flexible flat cable of claim 4, wherein said flexible flat cable body comprises: a lead group composed of a plurality of leads;

the th signal interface is provided with a plurality of th signal pins corresponding to a plurality of wires in the wire group;

the second signal interface is provided with a plurality of second signal pins corresponding to the plurality of wires in the wire group.
6. The flexible flat cable of claim 5, wherein said signal interface or said second signal interface is provided with a metal ground;

the aluminum foil mylar is connected with the metal grounding end.
7. The flexible flat cable of claim 1, wherein said mylar insulation layer is mylar film.
8. The flexible flat cable according to any of claims 1-7, wherein the corners of the flexible flat cable are provided with foam tape of a predetermined thickness.