KR20190097737A - Flexible Flat Cable - Google Patents

Abstract

The present invention relates to a flexible flat cable used in various electric and electronic devices and, more specifically, to a flexible flat cable which can protect or organize leads by mounting a mesh cover having flexibility on a cut portion of a cable. The flexible flat cable is divided into a cut section having a cut unit and a connection section having a lead exposure unit to allow a plurality of leads to form a single lead group in the cut section and allow a plurality of lead groups to be divided by respective cut units. The connection section is integrally formed into the cut section by covering an insulation film by interposing leads in the cut section and the connection section excluding the lead exposure unit. A first gap is formed on both edges in the longitudinal direction of the cut section to gather leads in the connection section on both ends of the cut section to form the lead exposure unit exposed to the outside. A second gap is formed on the edges and center of the lead exposure unit making up the connection section, and protection tape is attached to the lower end surface. A mesh cover is covered across the entire length of the cut section.

Description

Flexible Flat Cable {Flexible Flat Cable}

The present invention relates to a flexible flat cable used in various electrical and electronic devices, and more particularly, a flexible flat that is equipped with a reticular reticulated cover on the cutout of the cable to protect or organize the respective conductors. It's about cables.

In recent years, as high-definition products such as personal computers, digital printers, scanners, and the like have been developed, high-speed signal transmission is required, and electromagnetic interference is a problem.

That is, in signal transmission, unnecessary electromagnetic waves are easily leaked due to the high frequency and injected into adjacent cables, which may cause adverse effects such as malfunction or transmission loss.

Accordingly, various types of flexible flat cables that can shield electromagnetic waves by depositing a shielding layer made of a conductive metal on the surface of the insulating film or by adhering a shielding tape have been developed and used.

This flexible flat cable is widely used due to its excellent flexibility and low manufacturing cost, and the electromagnetic wave is prevented from being transmitted to the cable for signal transmission by the shield layer or the shield tape formed on both surfaces of the insulating film. It can be shielded from being emitted to or incident from the outside.

Regarding such a flexible flat cable, it is known by a number of publications such as Korean Patent Nos. 0890200, 0894443, 1009869, 1217099 and the like.

However, in the conventional flexible flat cable as described above, an insulating film is simply interposed between the conductor and the metal layer, and the width of the conductive metal layer is the same as the width of the insulating film, so that the side of the conductive metal layer is exposed to the outside. When contacted with, various problems such as a short circuit may occur.

In addition, since the flexible flat cable is configured to cut the entire section except the connection portion of the terminal, the conductors are easily split during the transportation or installation to the device. For this reason, it is necessary to perform the cleaning work by using a binding means such as a separate tape.

Patent No. 0890200 (2009.03.17) Name of the invention: Flexible flat cable. Patent No. 0894443 (2009.04.15) Name of the invention: flame-retardant adhesive film and flat cable comprising the same. Patent No.0981069 (2010.09.02) Name of the invention: Flexible flat cable. Patent No. 1217099 (2012.12.24) Name of the invention: Flexible flat cable.

The present invention is to solve the conventional problems as described above, an object of the present invention is to install a reticular cover body having elasticity to the cut portion of the flat cable to protect the individual wires as well as to arrange them uniformly. To provide a flexible flat cable.

In order to achieve the above object, the present invention is divided into a cutout section having a cutout and a connection section having a lead exposed part, so that a plurality of conductors form a single conductor group in the cutout section, and a plurality of conductor groups are each cut. It is configured to be divided by a portion, and formed integrally with the connection section incision section by covering the insulating film through the conductive wires in the incision section and the connection section except the exposed portion of the wire, and along the longitudinal direction of the incision section The first gap is formed at the edge to form a conductor exposed portion where the conductors are collected at the connection sections at both ends of the incision section and exposed to the outside, and a second gap is formed at the edge and the center of the exposed portion of the conductor constituting the connection section and at the same time, A protective tape is attached to the surface and a reticular cover is covered over the entire length of the incision section. Will.

In addition, the conductive wire exposed portion is configured to be arranged to be divided with each other around the second gap formed in the center, the reticulated cover body is configured to have elasticity by weaving two warp and weft yarns of the synthetic resin material in a tubular shape.

The present invention prevents the wires from splitting during transport or installation on the device by covering the reticular section of the flat cable having the conductive wire exposed portions at both ends thereof so as not to be exposed. You can do it.

This eliminates the need for additional work to clean up using a binding means such as a separate tape, as well as protects the wires.

1 is a perspective view showing an extract of the flexible flat cable disclosed in the Patent Publication No. 2015-0008764,
2 is an exploded perspective view of FIG. 1;
3 is a partial perspective view showing a state in which the cables are cut and stacked in the incision section,
4 is a plan view showing the arrangement of the conductors in the cable,
5 is a partially enlarged view of FIG. 4;
6 is a partial side view of the cable,
7 is a perspective view showing a flexible flat cable according to the present invention,
FIG. 8 is a plan view of FIG. 7;
9 is a cross-sectional view showing the center portion of the cable cut;
10 is a perspective view of a cable covered with a reticular cover body,
FIG. 11 is a plan view of FIG. 10;
12 is a cross-sectional view showing the center portion of the cable cut away.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, but the specific structures and functions of the present invention are not limited to the embodiments described in the specification because they illustrate only one configuration example.

First, a description will be given of a technique disclosed in Korean Laid-Open Patent No. 2015-0008764 as a preferred example to which the present invention is applied, and after the problem is derived, the configuration and effect of the present invention will be described below.

As shown in FIGS. 1 to 6, the flexible flat cable 100 includes a cutting section 101 in which a cutting line 109 is formed in a longitudinal direction, and a connection including a lead exposure end 105. It is divided into a section 103 and a transition section 105 connecting the incision section 101 and the connection section 103.

In the cutout section 101, a plurality of conductive wires form one conductive wire group at a pitch interval of 0.5 mm, and the plurality of conductive wire groups are gathered at a 1.0 mm pitch interval. A cutting line 109 is formed between the lead group and the lead group in the incision section 101. The cutting line serves to separate each group of conductors into strips 101.

In the transition section 105, all the conductors extending from the incision section 101 are gathered to form a constant interval, and in the connection section 103, all the conductors extending from the transition section 105 are in a straight line at a pitch interval of 0.5 mm. At the end, the leads extend outwards.

For convenience of description, a portion in which the conductive lines extend in a straight line at a pitch of 0.5 mm is called a straight line, and a portion where the conductive lines are exposed is defined as the conductive line exposed part 107. The straight section of the connection section is inserted into the connector 200 so that each of the conductive wires exposed by the conductive line exposed portion 107 is in electrical contact with the connecting terminals of the connector.

Referring to FIG. 2, the conductive wires 140 of the flexible flat cable are sandwiched between the lower insulating film 120 and the upper insulating film 160. Both of the upper insulating film 160 and the lower insulating film 120 are narrower than the width of the center portion so that the connector insertion portion when the final product is a final product.

Both ends of the upper insulating film 160 are shorter than the lower insulating film 120 so that the conductive wire is exposed in the final product to become the electrical contact terminal 143. Electrical contact terminals are exposed to the outside through the conductive wire 140 between the upper insulating film 160 and the lower insulating film 120 through both ends of the upper insulating film 160 which is shorter than the lower insulating film 120. (143).

Reinforcing plates 180 are attached to both ends of the lower insulating film 120 forming the connector inserting portion. The reinforcement plate 160 reinforces both ends of the final product to form a connector insert even without using a separate PCB board.

FIG. 3 shows a shape in which each conductor group is separated and stacked by a stipp 101 as a cutting line 109 between the conductor group and the conductor group in the incision section 101.

Next, the arrangement of the conductive wires inserted between the upper insulating film 160 and the lower insulating film 120 will be described. As shown in FIGS. 4 and 5, in the incision section 101, a plurality of conductive wires 140 are gathered at a 0.5 mm pitch P1 interval to form a single conductive wire group, and the plurality of conductive wires 140 are gathered again. Conductor groups are grouped at 1.0 mm width (P2 = 2X P1).

The cutting line 109 is formed between the lead group and the lead group in the incision section (C). The cutting line serves to separate each conductive group group G1, G2, G3, G4, and G5 into strips. Each of the conductors in one conductor group is arranged at an interval of 0.5 mm pitch P1, and the conductor group and the conductor group have a width P2 of 1.0 mm.

Referring to FIG. 6, in the flexible flat cable, the conductive wire 140 is disposed between the upper insulating film 160 and the lower insulating film 120. An end portion of the conductive wire 140 is exposed to the outside at the conductive line exposed end C3 of the connection section C, and a reinforcing plate 180 is attached to the lower insulating film 120 at the connecting section C.

A reinforcing plate 180 is attached to both ends of the lower end of the lower insulating film 120 which is a connection part inserted into the connector. The reinforcement plate 180 reinforces both ends in the final product so that the connector insertion part is not used even if a separate PCB board is not used.

However, in the prior art as described above, since the insulating film is simply interposed between the conductor and the metal layer, a problem may occur as the side end of the metal layer is exposed to the outside.

In addition, since the entire section is a cut-out part, the conductors are easily cracked in the process of transporting or installing in the device, and thus, the cumbersome work of using a binding means such as a separate tape must be performed.

Meanwhile, FIGS. 7 to 12 are views for explaining a flexible flat cable according to the present invention.

As illustrated in FIGS. 7 to 9, the flexible flat cable is divided into a cutout section S including a cutout part 11 and a connection section C including a conductive line exposed part 21. In the cutout section S, a plurality of conductive wires 13 form one conductive wire group SG and a plurality of conductive wire groups SG may be separated by the cutout 11.

That is, as the insulating film 15 is coated in the cutout section S and the connection section C except the conductive line exposed portion 21 through the conductive line 13, the connection section C is cut in the cutout section S. It is formed integrally with the protective tape 17 is attached to the lower end surface of the connection section (C) to serve as a connector.

Further, first gaps M1 are formed at both edges along the longitudinal direction of the cutout section S, and the conductive wires 13 are collected and exposed to the outside at the connection section C formed at both ends of the cutout section S. FIG. The conductive wire exposed portion C3 is formed, and the second gap M2 is formed at the edge and the center of the conductive wire exposed portion 21.

Accordingly, in the flexible flat cable, the connection section C is integrally formed with the cutout section S so that the connection section C can be directly plugged into the interface unit (not shown) of the device for transmitting and receiving signals. In this case, it is possible to reduce production cost and time by not requiring a connector including a separate PCB, and it is possible to fundamentally solve a problem of connection failure caused by soldering a conductor to a PCB.

The conductive wire exposed portion C3 of the connection section C has a second gap M2 in a state where the conductive wires 13 are arranged at predetermined intervals, and at the same time, there is a cutout groove 23 between the insulating film 15. Is formed, the width of the connection section (C) is designed to be plugged into the interface unit for signal transmission / reception.

In addition, all of the conductive wire exposed portions 21 formed at both ends of the flexible flat cable may be integrally formed, but if necessary, the second gap M2 formed at the center of the conductive wire exposed portion 21 may be centered. By dividing each other, it can be connected corresponding to the arrangement position of the interface unit according to the characteristics of the device.

10 to 12 are views showing a state where the mesh cover 30 is covered with the flexible flat cable in the above-described example. That is, the reticulated cover body 30 is mounted on the cutout section S having the cutout 11.

Accordingly, in the cutting section S, while the plurality of conductive wires 13 form one conductive wire group SG, the plurality of conductive wire groups SG may be separated by the cutout 11, respectively, but the reticulated cover body ( It is possible to prevent each conductor group SG from being dismantled by 30).

The conductive wire exposed portion 21 may be arranged to be divided with each other around the second gap M2 formed at the center. In the case of the reticulated cover body 30, two warp and weft yarns of thin synthetic resin materials are formed. It is preferable to comprise so that it may be woven into a cylindrical shape and has elasticity.

As described above, according to the flexible flat cable according to the present invention, the wires are split in the process of installing or transporting the device by covering the receptacle of the flat cable with the conductive wire exposed portions at both ends thereof so as not to be exposed. Discarding can be prevented.

This eliminates the need for additional `work to clean up using binding means such as a separate tape, etc., as well as protects the wires.

The technical problem of the present invention is achieved by the technical configuration as described above, although the present invention has been described by a limited embodiment and drawings, the present invention is not limited thereto but by those skilled in the art to which the present invention pertains. Various modifications and variations are possible, without departing from the spirit and scope of the appended claims.

11: incision 13: lead wire
15: insulating film 17: protective tape
21: exposed wire 23: cutting groove
30: reticulated cover

Claims (3)

It is divided into an incision section (S) having an incision (11) and a connection section (C) having a conductor exposed part (21) so that a plurality of conductors (13) in the incision section (S) is one conductor group (SG) At the same time forming a plurality of wire group (SG) is configured to be divided by each cutout 11,
When the insulating film 15 is coated on the cutout section S and the connection section C except the conductive line exposed portion 21 via the conductive line 13, the connection section C is connected to the cutout section S and the cutout section S. Formed integrally,
The first gap M1 is formed at both edges along the longitudinal direction of the cutout section S, and the lead 13 is collected at the connection section C at both ends of the cutout section S, and exposed to the outside. 21),
A second gap M2 is formed at the edges and the centers of the conductive wire exposed portion 21 constituting the connection section C, and a protective tape 17 is attached to the bottom surface thereof.
Flexible flat cable, characterized in that the reticulated cover body 30 is covered over the entire length of the incision section (S). The flexible flat cable according to claim 1, wherein the conductive line exposed part is arranged so as to be divided with each other about a second gap M2 formed at the center. The flexible flat cable according to claim 1, wherein the reticulated cover body (30) is constructed by weaving two warp and weft yarns of synthetic resin material into a tubular shape to have elasticity.

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