CN209912526U

CN209912526U - Flexible flat cable

Info

Publication number: CN209912526U
Application number: CN201920878457.0U
Authority: CN
Inventors: 焦养国; 颜红方; 王洁; 李荣耀
Original assignee: Changshu Hongbo Communication Technology Co Ltd
Current assignee: Changshu Hongbo Communication Technology Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-01-07
Anticipated expiration: 2029-06-12

Abstract

The utility model discloses a flexible flat cable, including insulating layer and a plurality of wire of arranging side by side, flexible flat cable is equipped with first wire kink and second wire kink, two wire kinks are parallel tip to flexible flat cable both ends, be equipped with the contained angle between the part of first wire kink and second wire kink or whole wire and the wire of parallel tip, the wire that is located between first wire kink and the second wire kink divide into a plurality of wire units, every wire unit contains a plurality of wires, interval between two nearest wires on the adjacent wire unit is greater than the interval between each wire on the single wire unit, first wire kink, the cross-section of second wire kink and the wire of part between the two is circular, the cross-section of parallel tip's wire is flat rectangle form. The utility model discloses be favorable to the production to realize, improve the product production yield, ensure product electrical property stable.

Description

Flexible flat cable

Technical Field

The utility model relates to a flexible cable especially relates to a flexible flat cable.

Background

The Flexible Flat Cable (hereinafter referred to as Flexible Flat Cable, FFC for short) is a novel multi-core Cable capable of selecting the number of the wires and the space between the adjacent wires at will, has the advantages of easy bending, thin thickness, small wiring space and the like, and is suitable for connecting electrical appliances among mobile electric devices in severe environments such as power generation, metallurgy, chemical engineering, ports and the like. The basic structure of the flexible flat wire comprises an upper insulating film and a lower insulating film, and a plurality of flat wires which are arranged in parallel at a certain interval and are clamped between the two insulating films. In order to reduce the occupied space of the cable, improve the universality and reduce the probability of short circuit of the cable. Chinese patent publication No. CN 205845539U discloses a flexible flat round conductor wire, which includes a flexible flat conductor wire, wherein a plurality of round conductor wire strips with the same width are formed in the middle of the flexible flat conductor wire in the length direction, and each round conductor wire strip includes a plurality of round conductor wires arranged in parallel at the same interval and insulating films bonded to the upper and lower surfaces of the plurality of conductor wires. The flexible flat wire is provided with reinforcing plates at both ends in the longitudinal direction, and the wire is extended toward both ends in the longitudinal direction and is formed in a flat shape at a portion corresponding to the reinforcing plates. In the actual production process, in order to ensure the safety of slitting and slitting, the distance between two round conductors positioned at the adjacent edges of two adjacent slitting is larger than the distance between all round conductors on the slitting of the round conductor on two adjacent slitting round conductors. In order to realize this structure, it is necessary to bend the round conductors on the partial round wire partial strip to change the pitch between the round conductors, and the bent portion is formed on the round conductors. The conductors are arranged at equal intervals from the bent portion to one end of the lead, and a part of the cross section of each conductor at the parallel end portion is flat (a part near one end of the lead) and the other part is circular (a part near the bent portion). Because the bending part is formed by pulling the conductor to the left side and the right side in parallel through the production device, the distance between the conductors on the parallel end parts is controlled by the wire grooves, the width of the wire grooves is determined according to the width of the flat section conductor, but the flat section conductor is formed by rolling the round section conductor, so the diameter of the round section conductor is smaller than the width of the flat section conductor, the round section conductor can swing in the wire grooves, the problem that the distance between the conductors on the parallel end parts is different when the conductor is pulled is easily caused, the product yield is influenced, and the electrical performance of the flexible flat cable is also influenced.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned prior art defect, the utility model discloses a task lies in providing a flexible flat cable, reduces the production difficulty through the cable structure change, improves the product production yield, stabilizes flexible flat cable's electrical property.

The utility model discloses technical scheme is such: a flexible flat cable comprises an insulating layer and a plurality of wires which are arranged in parallel, wherein the wires are fixed between the insulating layer by vertically laminating the insulating layer, the flexible flat cable is provided with a first wire bending part and a second wire bending part, parallel end parts are arranged between the first wire bending part and one end of the flexible flat cable and between the second wire bending part and the other end of the flexible flat cable, included angles are arranged between part or all of the wires of the first wire bending part and the second wire bending part and the wires of the parallel end parts, the wires positioned between the first wire bending part and the second wire bending part are divided into a plurality of wire units, each wire unit comprises a plurality of wires, the distance between two wires which are closest to each other on the adjacent wire units is larger than the distance between the wires on the single wire unit, the cross sections of the wires positioned at the first wire bending part, the second wire bending part and the part between the first wire bending part and the second wire bending part are circular, and the cross section of the wire positioned at the parallel end part is in a flat rectangular shape.

Further, the portion of the lead wire having a circular cross section and the portion of the lead wire having a flat rectangular cross section are integrally formed.

Further, each wire in the single wire unit is arranged in parallel and has equal spacing.

Further, the wires at the parallel ends are arranged in parallel and at equal intervals.

Furthermore, the insulating layer at the parallel end part is provided with a notch for exposing the lead.

Furthermore, reinforcing plates are arranged on the surfaces of the insulating layers at the two ends of the flexible flat cable.

Compared with the prior art, the utility model the advantage lie in: the wire cross-section of parallel tip is flat rectangle form, and the wire cross-section that begins to the second wire kink from first wire kink is circular, and the first bending point of wire is at the tie point of flat rectangle form wire and circular wire, can avoid the wire to deviate central point in the wire casing of production facility when the interval changes (constitutes a plurality of wire units), can guarantee that the interval between each wire of parallel tip is stable, improves product production yield, ensures that product electrical property is stable.

Drawings

Fig. 1 is a schematic view of the surface structure of a flexible flat cable.

Fig. 2 is a side sectional structural schematic view of the flexible flat cable.

Fig. 3 is a schematic view of a flexible flat cable conductor arrangement.

Fig. 4 is a partially enlarged view of a portion at 1 in fig. 3.

Detailed Description

The present invention will be further described with reference to the following examples, which should not be construed as limiting the invention.

Referring to fig. 1 to 3, the flexible flat cable according to the present embodiment includes an insulating layer 1 and a plurality of wires 2 arranged in parallel, wherein the insulating layer 1 is attached to the insulating layer 1 from top to bottom to fix the wires 2 between the insulating layer 1, the insulating layer 1 is generally made of a hot melt adhesive film such as a PET film, and the wires are covered with the insulating layer to fix and insulate the positions of the wires 2 from each other, thereby improving the overall flexibility of the flexible flat cable.

The flexible flat cable is provided with a first conducting wire bending part a and a second conducting wire bending part B, and it should be noted that the first conducting wire bending part a and the second conducting wire bending part B do not mean that the flexible flat cable is bent as a whole, but mean that the conducting wire 2 inside the insulating layer 1 is bent. Parallel end portions C are arranged between the first lead bending portion A and one end of the flexible flat cable and between the second lead bending portion B and the other end of the flexible flat cable, each lead 2 of the parallel end portions C are arranged in parallel, the distance between the lead 2 is equal, and the cross section of the lead 2 positioned at the parallel end portion C is in a flat rectangular shape. The insulating layer 1 of the parallel end portion C is provided with a notch 1a of an exposed wire, and the wire 2 exposed through the notch 1a forms a golden finger connected with other electric components. The surfaces of the insulating layers 1 at the two ends of the flexible flat cable, namely the back parts of the golden fingers, are provided with reinforcing plates 3 to enhance the strength of the connecting parts. An included angle is formed between part or all of the wires 2 of the first wire bending part A and the second wire bending part B and the wires 2 of the parallel end part C. The wires 2 between the first wire bending part a and the second wire bending part B are divided into a plurality of wire units 2a, each wire unit 2a comprises a plurality of wires 2, and the wires 2 in the wire units 2a are arranged in parallel and have equal intervals. As shown in fig. 4, a distance D1 between two nearest wires 2 of the adjacent wire units 2a is greater than a distance D2 between the wires 2 of the single wire unit 2 a. Each of the conductive wires 2 on the flexible flat cable is connected by welding instead of being formed in sections as a whole, the first conductive wire bending part a, the second conductive wire bending part B and the conductive wire 2 between the first conductive wire bending part a and the second conductive wire bending part B have circular cross sections, and the flat rectangular conductive wire with parallel end parts C is formed by rolling a circular conductive wire.

In the production process, all round wires 2 are arranged in parallel, then a calender rolls the part to be formed into a parallel end part C to form a flat rectangular wire 2, each wire 2 is fixed by the joint of an upper insulating layer 1 and a lower insulating layer 1, the flat rectangular wire 2 at the parallel end part C is fixed firstly, then a part of the wire 2 is bent towards two sides at the connecting point of the flat rectangular wire 2 and the round wire 2 by utilizing a variable-pitch device in the advancing process of the wire 2, the distance between the wires 2 is changed, the upper insulating layer 1 and the lower insulating layer 1 are continuously jointed to form a first wire bending part A and a wire unit 2a, then the variable-pitch device is continuously bent to enable the wire 2 to be close towards the middle, the bending is completed at the connecting point of the round wire 2 and the flat rectangular wire 2, the upper insulating layer 1 and the lower insulating layer 1 are continuously jointed to form a second wire, subsequently, the upper and lower insulating layers 1 are further bonded to form parallel end portions C. When the flexible flat cable is used, the part between the first lead bent part A and the second lead bent part B can be cut along the length direction by taking the lead unit 2a as a unit, namely, the cutting line is positioned in the range of the distance D1, and the lead units 2a separated from each other are formed to facilitate the arrangement of the wire harness.

Claims

1. A flexible flat cable comprises an insulating layer and a plurality of wires which are arranged in parallel, wherein the wires are fixed between the insulating layer by the up-down attachment of the insulating layer, the flexible flat cable is characterized in that the flexible flat cable is provided with a first wire bending part and a second wire bending part, parallel end parts are arranged between the first wire bending part and one end of the flexible flat cable and between the second wire bending part and the other end of the flexible flat cable, included angles are arranged between part or all of the wires of the first wire bending part and the second wire bending part and the wires of the parallel end parts, the wires positioned between the first wire bending part and the second wire bending part are divided into a plurality of wire units, each wire unit comprises a plurality of wires, the space between two nearest wires on the adjacent wire units is larger than the space between the wires on a single wire unit, the cross sections of the wires positioned at the first wire bending part, the second wire bending part and the part between the first wire bending part and the second wire bending part are circular, and the cross section of the wire positioned at the parallel end part is in a flat rectangular shape.

2. The flexible flat cable according to claim 1, wherein the portion of the conductive wire having the circular cross section and the portion of the conductive wire having the flat rectangular cross section are integrally formed.

3. The flexible flat cable according to claim 1, wherein each of said conductive wires in a single said conductive wire unit is arranged in parallel and at equal intervals.

4. The flexible flat cable according to claim 1, wherein said conductive wires at said parallel end portions are arranged in parallel and at equal intervals.

5. The flexible flat cable according to claim 1, wherein the insulating layer at the parallel end portions is provided with a notch exposing the conductive wire.

6. The flexible flat cable according to claim 1, wherein the insulating layer surfaces of both ends of the flexible flat cable are provided with reinforcing plates.