CN216671275U

CN216671275U - FFC high-frequency transmission line with fusing structure

Info

Publication number: CN216671275U
Application number: CN202123248047.4U
Authority: CN
Inventors: 叶时堃
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-06-03
Anticipated expiration: 2031-12-22

Abstract

The utility model provides an FFC high-frequency transmission line with a fusing structure, which is mainly formed by pressing a copper wire layer, two fusing wires, a first insulating layer and a second insulating layer through adhesive 40, wherein the copper wire layer comprises a plurality of copper wires arranged at intervals, at least one copper wire is provided with a first copper wire section and a second copper wire section forming a space with the first copper wire section.

Description

FFC high-frequency transmission line with fusing structure

Technical Field

The present invention relates to a high frequency transmission line, and more particularly, to an FFC (flexible flat cable) high frequency transmission line with a fuse structure.

Background

A Flexible Flat Cable (FFC) is a signal transmission device, and has the advantages of flexibility, free bending and folding, thin thickness, small volume, simple connection, easy detachment, and easy solution to electromagnetic shielding. In addition, the flexible flat cable can select the number and the interval of the wires at will, the connection is convenient, the volume of an electronic product is greatly reduced, the production cost is reduced, the production efficiency is improved, the flexible flat cable is most suitable for being used as a data transmission cable between a mobile part and a mainboard, between a PCB and the PCB and in miniaturized electrical equipment, and the flexible flat cable is matched with an electrical connector for use so as to transmit signals from one end to the other end and achieve the purpose of signal transmission.

As shown in fig. 1, the present flexible flat cable 10 is formed by laminating a PET (polyester film) insulating material and an extremely thin tin-plated flat copper wire through a high-tech automatic equipment production line, that is, by laminating a copper wire 13 through an upper PET film 11 and a lower PET film 12 through an adhesive; however, since the conventional flexible flat cable 10 has no fuse structure, when a circuit to which the flexible flat cable 10 belongs fails or is abnormal, the current will rise continuously, and the rising current may damage some important electrical components in the circuit, and may burn the circuit or even cause a fire.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an FFC high-frequency transmission line with a fusing structure, which is mainly used for fusing and cutting off current when the current is abnormally increased, thereby playing a role in protecting the safe operation of a circuit.

In order to achieve the above object, the present invention adopts a technical solution of an FFC high frequency transmission line with a fuse structure, comprising: the copper wire layer comprises a plurality of copper wires arranged at intervals, and at least one copper wire is provided with a first copper wire section and a second copper wire section which forms a space with the first copper wire section; the fuse wire is electrically connected between the first copper wire section and the second copper wire section of the at least one copper wire, and the melting point of the at least one fuse wire is lower than that of the at least one copper wire; a first insulating layer bonded to one side of the copper wire layer by an adhesive; and a second insulating layer adhered to the other side of the copper wire layer by the adhesive and covering the at least one fuse.

The utility model has the following effects: because the utility model is electrically connected with a fuse wire by a copper wire with a space, and the melting point of the fuse wire is lower than that of the copper wire, when the copper wire electrically connected with the fuse wire is used as a circuit design, once the circuit is in failure or abnormal, the circuit will be continuously increased along with the current and generate heat, the heating value is increased along with the increase of time, and when the temperature is increased to be higher than the melting point of the fuse wire, the fuse wire is fused, so that the circuit is broken, and the effect of protecting the safe operation of the circuit is achieved.

Preferably, the at least one fuse includes a fuse layer electrically connecting the first copper wire segment and the second copper wire segment, and an insulating layer disposed on the fuse layer.

Preferably, the fuse layer of the at least one fuse wire is one of an aluminum foil, a copper foil or a tin foil.

Preferably, the insulating layer of the at least one fuse is one of polypropylene (PP), Polyethylene (PE) or polyester film (PET).

Preferably, the at least one fuse wire has two wire portions and a fuse portion connected between the two wire portions and having a width smaller than that of the two wire portions, and the fuse portion corresponds to a distance between the first copper wire segment and the second copper wire segment.

Preferably, the at least one fuse line is a line body with the same width and has a through hole, and the through hole corresponds to the distance between the first copper wire section and the second copper wire section.

Preferably, the cross sections of the at least one copper wire and the at least one fuse wire are rectangular.

Preferably, the width of the at least one fuse line is smaller than the width of the at least one copper line.

Drawings

Fig. 1 is a schematic cross-sectional view of a conventional flex cable.

Fig. 2 is a perspective view of the first embodiment of the present invention.

Fig. 3 is a cross-sectional view taken along line 3-3 of fig. 2.

Fig. 4 is a partially enlarged view of fig. 3.

Fig. 5 is a cross-sectional view taken along line 5-5 of fig. 2.

FIG. 6 is a schematic longitudinal cross-sectional view of a second embodiment of the present invention, showing a state where the width of the fuse line is smaller than the width of the copper line.

Fig. 7 is a longitudinal cross-sectional view of a third embodiment of the present invention, showing a state where each copper wire is provided with a fuse.

FIG. 8 is a schematic cross-sectional view of a fourth embodiment of the present invention, showing a fuse wire having a fuse portion with a smaller width.

Fig. 9 is a schematic cross-sectional view of a fifth embodiment of the present invention, showing a state where a fuse is provided with a through hole.

Description of the reference numerals

10 … flexible flat cable

11 … PET film

12 … PET film

13 … copper wire

100 … FFC high frequency transmission line

20 … copper wire layer

X … transverse direction

Y … longitudinal direction

21 … copper wire

211 … first copper wire section

212 … spacing

213 … second copper wire section

214 … width

30 … fuse

31 … fusion layer

32 … insulating layer

33 … width

34 … line part

35 … fused part

36 … perforation

40 … first insulating layer

50 … second insulating layer

60 … glue.

Detailed Description

The foregoing and other aspects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.

Referring to fig. 2 to 5, a first embodiment of the utility model provides an FFC high-frequency transmission line 100 with a fuse structure, which is formed by laminating a copper wire layer 20, two fuse wires 30, a first insulating layer 40 and a second insulating layer 50 through an adhesive 60, wherein:

the copper wire layer 20 comprises four copper wires 21 which are arranged at equal intervals along the transverse direction X and are tinned flat, and the section of each copper wire 21 is rectangular; the two copper lines 21 arranged at a certain distance have a first copper line segment 211 and a second copper line segment 213 forming a certain distance 212 with the first copper line segment 211 along the length direction Y.

Two fuse links 30 electrically connected between the first copper wire segment 211 and the second copper wire segment 213 of the copper wire 21, so that the fuse links 30 are disposed between the first copper wire segment 211 and the second copper wire segment 213 in a crossing manner, thereby electrically connecting the first copper wire segment 211 and the second copper wire segment 213; the melting points of the two other fuse wires 30 are lower than the melting point of the copper wire 21; in the present embodiment, each fuse 30 includes a fuse layer 31 electrically connecting the first copper segment 211 and the second copper segment 213, and an insulating layer 32 disposed on the fuse layer 31; wherein the melting layer 31 of the fuse wire 30 is an aluminum foil, but not limited thereto, either a copper foil or a tin foil may be used, as long as the melting point of the melting layer 31 is lower than the melting point of the copper wire 21; the insulating layer 32 of the fuse 30 is polypropylene (PP), but not limited thereto, Polyethylene (PE) or polyester film (PET) may be used.

The first insulating layer 40 is bonded to one side of the copper wire layer 20 by an adhesive 60; in this embodiment, the first insulating layer 40 is a polyester film (PET).

The second insulating layer 50 is bonded to the other side of the copper wire layer 20 by the adhesive 60 and covers the fuse wires 30; in this embodiment, the first insulating layer 50 is a polyester film (PET).

The above is a description of the FFC high-frequency transmission line 100 with the fuse structure of the present invention, and accordingly, the present invention particularly electrically connects the fuse 30 between the first copper line segment 211 and the second copper line segment 213 of the copper line 21, so that the fuse 30 is disposed between the first copper line segment 211 and the second copper line segment 213, thereby electrically connecting the first copper line segment 211 and the second copper line segment 213, and in addition, with the characteristic that the melting point of the fuse 30 is lower than the melting point of the copper line 21, therefore, when the copper wire 21 electrically connected to the fuse 30 is designed as a circuit, if a failure or abnormality occurs in the circuit, the current rises and heat is generated, and the amount of heat generated increases with the increase of time, when the temperature rises above the melting point of the fuse wire 30, the fuse wire 30 is fused, and the circuit is broken, so that the safe operation of the circuit is protected.

Referring to fig. 6, a second embodiment of the utility model provides an FFC high-frequency transmission line 100 with a fuse structure, which is different from the first embodiment in that:

the cross-section of each copper wire 21 and each fuse wire 30 is rectangular, and the width 33 of each fuse wire 30 is smaller than the width 214 of the copper wire 21, so as to change the type of the fuse wire 30 according to the requirement to control the resistance value or the breaking capacity thereof, so that the fuse wire 30 can be surely fused at the maximum allowable current under the rated voltage.

Referring to fig. 7, a third embodiment of the utility model provides an FFC high-frequency transmission line 100 with a fuse structure, which is different from the first embodiment in that:

the four copper lines 21 each have a first copper line segment 211 and a second copper line segment 213 spaced from the first copper line segment 211 by a distance 212, and the number of the fuse lines 30 is four corresponding to the number of the copper lines 21, so as to meet the requirement of circuit design.

Referring to fig. 8, a fourth embodiment of the utility model provides an FFC high-frequency transmission line 100 with a fuse structure, which is different from the third embodiment in that:

each fuse wire 30 has two wire portions 34 and a fusing portion 35 connected between the two wire portions 34 and having a width smaller than that of the two wire portions 34, the fusing portion 35 corresponds to the distance 212 between the first copper wire segment and the second copper wire segment, so as to ensure that the fusing portion of the fuse wire 30 is the fusing portion 35, and the fusing portion 35 is located at the distance 212 between the first copper wire segment and the second copper wire segment, thereby ensuring that the circuit is broken and achieving the effect of protecting the safe operation of the circuit.

Referring to fig. 9, a fifth embodiment of the utility model provides an FFC high frequency transmission line 100 with a fuse structure, which is different from the third embodiment in that:

each fuse wire 30 is a wire body with the same width and has a through hole 36, and the through hole 36 corresponds to the distance 212 between the first copper wire section and the second copper wire section, so as to ensure that the fused part of the fuse wire 30 is located at the distance 212 between the first copper wire section and the second copper wire section, thereby ensuring that the circuit is broken, and achieving the effect of protecting the safe operation of the circuit.

It should be noted that the above-mentioned embodiments and drawings are only preferred embodiments of the present invention, and the scope of the present invention should not be limited by the above-mentioned embodiments.

Claims

1. The utility model provides a FFC high frequency transmission line of utensil fusing structure which characterized in that: comprises the following steps:

the copper wire layer comprises a plurality of copper wires arranged at intervals, and at least one copper wire is provided with a first copper wire section and a second copper wire section which forms a space with the first copper wire section;

the fuse wire is electrically connected between the first copper wire section and the second copper wire section of the at least one copper wire, and the melting point of the at least one fuse wire is lower than that of the at least one copper wire;

a first insulating layer bonded to one side of the copper wire layer by an adhesive; and

a second insulating layer adhered to the other side of the copper wire layer by the adhesive and covering the at least one fuse wire.

2. The FFC high-frequency transmission line with the fuse structure of claim 1, wherein: the at least one fuse wire comprises a fusing layer and an insulating layer, wherein the fusing layer is electrically connected between the first copper wire section and the second copper wire section, and the insulating layer is arranged on the fusing layer.

3. The FFC high-frequency transmission line with the fuse structure of claim 2, wherein: the fusing layer of the at least one fusing line is one of aluminum foil, copper foil or tin foil.

4. The FFC high-frequency transmission line with the fuse structure of claim 2, wherein: the insulating layer of the at least one fuse is one of polypropylene (PP), Polyethylene (PE) or polyester film (PET).

5. The FFC high-frequency transmission line with the fuse structure of claim 1, wherein: the fuse wire is provided with two wire parts and a fusing part which is connected between the two wire parts and has a width smaller than the two wire parts, and the fusing part corresponds to the distance between the first copper wire section and the second copper wire section.

6. The FFC high-frequency transmission line with the fuse structure of claim 1, wherein: the at least one fuse wire is a wire body with the same width and a through hole, and the through hole corresponds to the distance between the first copper wire section and the second copper wire section.

7. The FFC high-frequency transmission line with the fuse structure of claim 1, wherein: the cross sections of the at least one copper wire and the at least one fuse wire are rectangular.

8. The FFC high-frequency transmission line with the fuse structure of claim 7, wherein: the width of the at least one fuse wire is smaller than that of the at least one copper wire.