WO2022062360A1

WO2022062360A1 - Strip-shaped electrical cable

Info

Publication number: WO2022062360A1
Application number: PCT/CN2021/085302
Authority: WO
Inventors: 李森林; 汪青海
Original assignee: 贸联电子 (昆山) 有限公司
Priority date: 2020-09-22
Filing date: 2021-04-02
Publication date: 2022-03-31
Also published as: CN213070660U

Abstract

A strip-shaped electrical cable, comprising a cable core and a covered Mylar layer (4) covering the exterior of the cable core. The cable core comprises signal lines (1) and/or power supply lines (2). The signal lines (1) and/or the power supply lines (2) are extended in a first direction; the signal lines (1) and/or the power supply lines (2) are arranged in a second direction; and the first direction is perpendicular to the second direction. The cable core also comprises several reinforcing lines (3) used for reinforcing the tensile performance and the flexural performance of the strip-shaped electrical cable. The reinforcing lines (3) are extended in the first direction and arranged jointly with the signal lines (1) and/or the power supply lines (2) in the second direction. The signal lines (1) are coaxial cables or twisted pair cables. The power supply lines (2) are coaxial cables or twisted pair cables. The reinforcing lines (3) are cotton threads, nylon threads, or bulletproof fibers. The strip-shaped electrical cable is flat, has a small footprint, has improved tensile and flexural performances, and satisfies requirements of electronic products.

Description

a ribbon cable

technical field

The present invention relates to a ribbon cable.

Background technique

With the advent of the smart home era, consumer electronic products are required to be thinner, softer, smaller, and easier to carry. The traditional cables used to transmit signals and electrical energy in electronic products are mostly round wires, which are composed of signal transmission wires and other cables and braids. Each process will destroy the performance of signal transmission, and it is easy to bend during processing, which can no longer be satisfied. these requirements. Therefore, it is necessary to design a flexible ribbon cable with a small footprint, bending resistance, high temperature resistance, and electromagnetic interference resistance.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a ribbon cable with small occupied space and good tensile and bending resistance properties at the same time.

To achieve the above object, the technical scheme adopted in the present invention is:

A ribbon cable, comprising a cable core and a covered Mylar layer wrapped around the cable core; the cable core includes a signal line and/or a power line, and the signal line and/or the power line are Extending in a first direction, the signal wires and/or the power wires are arranged in a second direction, and the first direction is perpendicular to the second direction; the cable core further comprises a The reinforcing wire of tensile resistance and bending resistance, the reinforcing wire extends along the first direction and is arranged in the second direction together with the signal wire and/or the power wire.

By arranging the signal wires and/or the power wires and/or the reinforcing wires in the same direction, the overall cable is in the form of a flat ribbon, which occupies a small space. In addition, the reinforcement wire is arranged to enhance the tensile resistance and bending resistance of the ribbon cable, so that the cable has good tensile and bending resistance while occupying a small space.

According to some preferred implementation aspects of the present invention, the ribbon cable is provided with the reinforcing wires at least at the two outermost sides arranged along the second direction. That is, the two outermost sides of the flat cable are provided with reinforcing wires, so that when the flat cable is stretched or bent, it can play a more protective role than just disposing the reinforcing wires at other positions inside. In some embodiments, if there are multiple reinforcing wires, the other reinforcing wires are symmetrically arranged in the ribbon cable except for the reinforcing wires on both sides, so as to have better tensile and bending resistance effects. Specifically, if there are three reinforcing wires, one reinforcing wire is arranged in the middle of the ribbon cable; if there are four reinforcing wires, then approximately one-third and two-thirds of the ribbon cable are arranged. a reinforcement line.

By arranging the reinforcing wires symmetrically on both sides and inside, when the ribbon cable is stretched by external force, the reinforcing wires can be uniformly stressed, so that the tensile resistance effect of the ribbon cable is good; The reinforcement wire is the first to be stressed, which plays a certain buffering role and improves the bending resistance of the ribbon cable. On the other hand, arranging the power lines and signal lines inside and the enhancement lines outside can better protect the internal signal lines and power lines.

According to some preferred implementation aspects of the present invention, the signal wire is a coaxial cable or a twisted pair cable, and the power wire is a coaxial cable or a twisted pair cable. The use of twisted pair cables can further improve the tensile and bending resistance of the ribbon cable.

According to some preferred implementation aspects of the present invention, when the signal wire is a coaxial cable, the signal wire includes a signal wire conductor core wire, a signal wire insulation layer covering the signal wire conductor core wire, a covering The signal line anti-interference layer of the signal line insulation layer. When the signal wire is a coaxial cable, the signal wire anti-interference layer includes a signal wire copper alloy shielding layer covering the signal wire insulation layer, and a signal wire metal shielding layer covering the signal wire copper alloy shielding layer. The Mylar layer and the signal line heat-melting Mylar layer covering the metal Mylar layer of the signal line.

According to other preferred implementation aspects of the present invention, when the signal wire is a twisted pair cable, the signal wire includes two twisted pair signal transmission wires, and the signal transmission wire includes a signal wire conductor core wire, which covers the The signal wire insulating layer of the conductor core wire of the signal wire, and the signal wire anti-interference layer covering the signal wire insulating layer. When the signal wire is a twisted pair cable, the signal wire anti-interference layer includes a signal wire copper alloy shielding layer covering the signal wire insulation layer, and a signal wire metal shielding layer covering the signal wire copper alloy shielding layer. The Mylar layer and the signal line heat-melting Mylar layer covering the metal Mylar layer of the signal line.

No matter when the signal line is a coaxial cable or a twisted pair cable, the anti-interference layer of the signal line includes, from the inside to the outside, the copper alloy shielding layer of the signal line, the metal Mylar layer of the signal line and the hot-melt Mylar of the signal line. Floor. That is, the signal wire or signal transmission wire in the present application is provided with a three-layer shielding structure outside the conductor core wire and the insulating layer, so as to play a better shielding effect and improve the anti-electromagnetic interference capability of the ribbon cable.

According to some preferred implementation aspects of the present invention, the metal in the metal Mylar layer of the signal line is in contact with the copper alloy in the copper alloy shielding layer of the signal line. Specifically, the metal Mylar layer of the signal line includes a substrate layer such as a PET layer and a metal such as copper foil and/or aluminum foil attached to the substrate layer, and the metal is in contact with the copper alloy in the copper alloy shielding layer of the signal line and conducts , which can better play a shielding role. In some embodiments, the copper alloy in the copper alloy shielding layer of the signal line is a braided structure of copper wires; the metal Mylar layer may be a copper foil Mylar layer, an aluminum foil Mylar layer, or a copper-aluminum wheat layer including both copper and aluminum. Pull layers.

According to some preferred implementation aspects of the present invention, when the power cord is a coaxial cable, the power cord includes a power cord conductor core wire and a power cord insulation layer covering the power cord conductor core wire.

According to other preferred implementation aspects of the present invention, when the power cord is a twisted pair cable, the power cord includes two twisted power transmission lines, and the power transmission line includes a conductor core wire of the power cord, which covers the Power cord insulation for power cord conductor cores.

According to some preferred implementation aspects of the present invention, when both the signal line and the power line are coaxial cables, the diameter of the conductor core of the power line is larger than the diameter of the conductor core of the signal line; when the power line When the signal line is a coaxial cable and the signal line is a twisted pair cable, the diameter of the conductor core wire of the power supply line is larger than the diameter of the conductor core wire of the signal line in the signal transmission line. The power line is used to transmit power, and the signal line is used to transmit signals. Since the signal line has a three-layer shielding structure in addition to the inner core wire and insulating layer, the diameter of the conductor core wire of the power supply line or power transmission line in the above case is larger than Conductor core wire of signal line or signal transmission line to better realize their respective functions and ensure that the overall diameter (coaxial cable or twisted pair cable) is maintained within a certain range, so that the outermost ring is covered with Mylar layer The fit and filling between the cable is beneficial to the tensile and bending resistance of the ribbon cable.

According to some preferred implementation aspects of the present invention, when both the signal line and the power line are twisted pair cables, the adjacent signal transmission lines, the adjacent power transmission lines, and/or the adjacent signal transmission lines Fitting between the transmission line and the power transmission line. When the pitch of the helix formed by the cables in the twisted-pair cable is relatively large, since the cross-section of the twisted-pair cable is not a regular circle, it is possible to make the distance between adjacent signal transmission lines and signal transmission lines, or between adjacent signal transmission lines. Adjacent signal transmission lines and power transmission lines or between adjacent power transmission lines and power transmission lines can be partially fitted to strengthen the connection between the cables, improve the bending resistance of the ribbon cable, and can further reduce the take up space.

According to some preferred implementation aspects of the present invention, the reinforcing thread is cotton thread, nylon thread or bulletproof thread, so as to better improve the tensile and bending resistance of the ribbon cable.

According to some preferred implementation aspects of the present invention, the signal line is disposed between the power line and the enhancement line. Placing the signal line between the power line and the enhancement line can further protect the signal line to ensure stable signal transmission.

According to some preferred implementation aspects of the present invention, the material of the insulating layer is a polyfluorinated material, such as Fluorinated ethylene propylene (FEP), tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (Polyfluoroalkoxy, PFA), ethylene-tetrafluoro-ethylene (ethylene-tetra-fluoro-ethylene, ETFE). Polyfluorine-based materials have many excellent properties such as low smoke and halogen-free, environmental protection, high/low temperature resistance, aging resistance, oil resistance, etc. The use of them to prepare insulating layers makes the shielding effect of signal lines and power lines resistant to stretching and bending. The folding effect is better, thereby improving the anti-electromagnetic interference and resistance to stretching and bending of the ribbon cable. And the insulating layer is prepared by using polyfluorinated materials. Due to the characteristics of polyfluorinated materials (low dielectric constant), even if the layer thickness of the insulating layer is reduced, the insulating effect can also be guaranteed, and the diameter of the cable can be reduced. Take up less space.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the ribbon cable of the present invention is flat, which not only occupies less space, but also has better tensile and bending resistance properties, and can meet the needs of electronic products. demand.

Description of drawings

FIG. 1 is a schematic cross-sectional view of the ribbon cable according to the first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the ribbon cable according to the second embodiment of the present invention.

FIG. 3 is another schematic cross-sectional view of the ribbon cable according to the second embodiment of the present invention.

In the above drawings: 1. Signal wire; 11. Signal wire conductor core wire; 12. Signal wire insulating layer; 13. Signal wire copper alloy shielding layer; 14. Signal wire metal Mylar layer; 15. Signal wire hot-melt wheat Pull layer; 16. Signal transmission line;

2. Power cord; 21. Conductor core wire of power cord; 22. Power cord insulation layer; 23. Power transmission line;

3. Enhanced line;

4. Covered with Mylar layer.

detailed description

The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

Example 1

As shown in FIG. 1 , a flat cable includes a cable core containing a plurality of cables and a covering Mylar layer 4 (sheath layer) wrapped around the cable core.

In this embodiment, the cable core includes a plurality of signal wires 1 and a plurality of power wires 2 . Both the signal line 1 and the power line 2 extend along the first direction and are arranged along the second direction, wherein the first direction is perpendicular to the second direction. In FIG. 1 , the first direction is the direction perpendicular to the drawing surface, and the second direction is the horizontal direction on the drawing surface. Therefore, the signal line 1 and the power line 2 extend in parallel and are arranged side by side in a row, so that the entire cable core presents a flat ribbon shape.

The cable core further includes a reinforcing wire 3, and the reinforcing wire 3 is used to enhance the tensile resistance and bending resistance of the ribbon cable. The reinforcing wire 3 also extends in the first direction, and is arranged in the second direction together with the signal wire 1 and the power wire 2 . The reinforcing thread 3 can be made of cotton thread, nylon thread or bulletproof thread.

As shown in FIG. 1, the signal line 1 and the power line 2 can be arranged at intervals; for another example, the signal line 1 and the power line 2 are respectively set as multiple groups, and each group includes one or more signal lines 1 Or power lines 2, multiple groups of signal lines 1 and multiple groups of power lines 2 are arranged at intervals. Preferably, the signal line 1 is arranged between the power line 2 and the enhancement line 3, which can further protect the signal line 1 to ensure stable transmission of the signal. In this embodiment, the signal lines 1 are divided into two groups, one group includes four signal lines 1, the other group includes two signal lines 1, and the power lines 2 are divided into one group, including two power lines 2, and two A group of signal lines 1 are located on both sides of a group of power lines 2 respectively. Two reinforcing wires 3 are used and are divided into two groups, which are respectively arranged on both sides of the whole formed by the signal wire 1 and the power wire 2, so that when the ribbon cable is bent, the reinforcing wires 3 on both sides are first stressed, Play a certain buffering effect and improve the bending resistance of the ribbon cable.

In other embodiments, while the reinforcement lines 3 are provided outside the two sides of the whole formed by the signal line 1 and the power line 2, the adjacent power lines can also be located between the

adjacent signal lines

1 and 1 and the adjacent power lines. 2 and the power line 2, and between the adjacent signal line 1 and the power line 2, there are reinforcement lines.

In this embodiment, the diameter of the signal line 1 and the diameter of the power line 2 are equal to or similar to the diameter of the reinforcement line 3, and the signal line 1, the power line 2 and the reinforcement line 3 are arranged and arranged along the second direction so as to form various parts of the structure. For the cable core with the same thickness, the thickness direction of the cable core is the third direction perpendicular to the first direction and the second direction, that is, the vertical direction on the drawing in Figure 1, and the width of the cable core in the second direction is greater than Thickness in the third direction. By limiting the overall diameter of each cable to be the same or within a similar range (such as signal and power cables and the ratio of the diameter of the reinforcement wire is 1:0.8-1.2:0.8-1.2), avoid a certain cable or some wires If the cable is too thin or too thick, it ensures the fit and filling between the outermost covered Mylar layer 4 and the cable core, which is beneficial to the tensile and bending resistance of the ribbon cable.

The covered Mylar layer 4 is made of PET Mylar material and is made by the FFC lamination process, that is, the upper and lower PET films of the cable core are pasted onto the cable core through the adhesive layer on the inner surface thereof to form the covered Mylar layer 4 .

The signal line 1 and the power line 2 in this embodiment all use coaxial cables. For the signal line 1, it is a single signal transmission line 16, and each signal transmission line 16 includes a signal line conductor core 11 for transmitting radio signals, a signal line insulating layer 12 covering the signal line conductor core 11, and a signal line covering the signal line. Signal line anti-interference layer of the line insulating layer 12 . Wherein, the signal line anti-interference layer used to reduce the interference of surrounding metal objects to signal transmission further includes the signal line copper alloy shielding layer 13 covering the signal line insulating layer 12 and the signal line copper foil covering the signal line copper alloy shielding layer 13 The Mylar layer 14 and the signal line hot-melt Mylar layer 15 made of PET material covering the signal line copper foil Mylar layer 14 . Wherein, the copper alloy shielding layer 13 of the signal line can be grounded. For the single power transmission lines 23 , each power transmission line 23 includes a power line conductor core 21 for transmitting power signals, and a power line insulation layer 22 covering the power line conductor core 21 .

The signal line is provided with a three-layer shielding structure (anti-interference layer) outside the conductor core wire and the insulating layer to better achieve the shielding effect and improve the anti-electromagnetic interference ability of the ribbon cable. Further, in this embodiment, the copper foil in the signal line copper foil Mylar layer 14 is in contact with the copper alloy in the signal line copper alloy shielding layer 13, which can better play a shielding role.

In this embodiment, the diameter of the conductor core wire 21 of the power supply line is larger than the diameter of the conductor core wire 11 of the signal line. The power line is used to transmit power, and the signal line is used to transmit signals. Since the signal line has three layers of signal line anti-interference layers in addition to the inner core wire and insulating layer, the diameter of the conductor core wire of the power line is set larger than that of the signal transmission line. The core wire, on the one hand, can better realize their respective functions, and at the same time ensure that the overall diameter is maintained within a certain range, so that the outermost covered Mylar layer 4 and the cable core are better fitted and filled, which is beneficial to Stretching and bending resistance of ribbon cables.

In this embodiment, the insulating layers of the cable (signal wire insulating layer 12, power wire insulating layer 22) are made of polyfluorine materials, which can reduce the diameter of the cable and reduce the occupied space while ensuring the insulating effect.

Embodiment 2

As shown in FIG. 2 , the difference between the ribbon cable of this embodiment and the first embodiment is that both the signal line 1 and the power line 2 use twisted pair cables.

For the signal line 1, it includes two twisted signal transmission lines 16, and each signal transmission line 16 includes a signal line conductor core 11, a polyfluorine-based signal line insulating layer 12 covering the signal conductor core 11, and a signal covering the signal line. Signal line anti-interference layer of the line insulating layer 12 . The signal line anti-interference layer includes a signal line copper alloy shielding layer 13 covering the signal line insulating layer 12, a signal line metal Mylar layer 14 covering the signal line copper alloy shielding layer 13, and a signal line metal Mylar layer covering the signal line The signal line of PET material 14 is hot-melted with the Mylar layer 15. The power cord 2 includes two twisted power transmission lines 23 , and each power transmission line 23 includes a power cord conductor core 21 and a polyfluorine power cord insulation layer 22 covering the power cord conductor core 21 .

When both the signal line and the power line use twisted pair cables, use the signal transmission line and the power transmission line with the same or similar diameter, so that the overall size of the formed signal line 1 and power line 2 is the same or similar, and the diameter of the reinforcement line 3 is set to The overall size of the signal line 1 and the power line 2 is the same or close to avoid that a certain cable or some cables are too thin or too thick, and ensure the fit and filling between the outermost covered Mylar layer 4 and the cable core , which is beneficial to the tensile and bending resistance of the ribbon cable.

As shown in Figure 3, when the pitch of the helix formed by the cable in the twisted pair cable is relatively large, since the cross section of the twisted pair cable is not a regular circle, the adjacent signal transmission lines can be The signal transmission lines, the adjacent signal transmission lines and the power transmission lines, and the adjacent power transmission lines and the power transmission lines can be partially fitted to strengthen the connection between the cables and improve the bending resistance of the ribbon cable, and The occupied space can be further reduced.

The advantages of the above scheme are: 1. The multi-layer shielding structure has excellent anti-electromagnetic interference performance; and the metal in the metal Mylar layer of the signal line is set in contact with the copper alloy in the copper alloy shielding layer of the signal line, which can better protect the 2. There are reinforcing lines on both sides of the ribbon cable, which can effectively improve the tensile and bending resistance of the cable; 3. The jacket layer adopts the FFC lamination process, which is neatly arranged without distortion and occupation. Small space and resistance to bending; 4. The polyfluorine insulating layer is made of high temperature resistant polyfluorine insulating material. Due to the low dielectric constant, the thickness of the insulating layer can be reduced while ensuring the insulating effect, thereby reducing the cable's thickness. 5. Change the circular structure of the traditional cable to a ribbon structure without cabling and weaving, reducing the damage to signal transmission by various processes.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the art to understand the content of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included within the protection scope of the present invention.

Claims

A ribbon cable, characterized in that: the ribbon cable includes a cable core and a covered Mylar layer wrapped around the cable core; the cable core includes a signal wire and/or a power wire, and the signal wire And/or the power cords all extend along a first direction and are arranged along a second direction, and the first direction is perpendicular to the second direction; the cable core further comprises a tensile strength for strengthening the ribbon cable. A reinforcing wire for extensibility and bending resistance is provided, the reinforcing wire extends along the first direction and is arranged along the second direction together with the signal wire and/or the power wire.
The ribbon cable according to claim 1, wherein the ribbon cable is provided with the reinforcing wires at least on the two outermost sides arranged along the second direction.
The ribbon cable according to claim 1, wherein the signal wire is a coaxial cable or a twisted pair cable, and the power wire is a coaxial cable or a twisted pair cable.
The ribbon cable according to claim 3, wherein when the signal wire is a coaxial cable, the signal wire comprises a conductor core wire of the signal wire, a conductor core wire covering the signal wire Signal line insulating layer, signal line anti-interference layer covering the signal line insulating layer; when the signal line is a twisted pair cable, the signal line at least includes two twisted pair signal transmission lines, the signal transmission line It includes a signal wire conductor core wire, a signal wire insulation layer covering the signal wire conductor core wire, and a signal wire anti-interference layer covering the signal wire insulation layer.
The ribbon cable according to claim 4, wherein: when the signal line is a coaxial cable, the signal line anti-interference layer of the signal line and when the signal line is a twisted pair cable At the same time, the signal line anti-interference layer of the signal transmission line includes a signal line copper alloy shielding layer covering the signal line insulating layer, a signal line metal Mylar layer covering the signal line copper alloy shielding layer, The signal line of the metal Mylar layer of the signal line is thermally fused to the Mylar layer.
The ribbon cable according to claim 5, wherein the metal in the metal Mylar layer of the signal line is in contact with the copper alloy in the copper alloy shielding layer of the signal line.
The ribbon cable according to claim 4, characterized in that: when the power cord is a coaxial cable, the power cord comprises a conductor core wire of the power cord, a conductor core wire covering the power cord conductor Power line insulation layer; when the power line is a twisted pair cable, the power line includes at least two twisted power transmission lines, and the power transmission line includes a power line conductor core wire, and a power line conductor core that covers the power line. The power cord insulation of the cord.
The ribbon cable according to claim 7, wherein when the signal line and the power line are both coaxial cables, the diameter of the conductor core of the power line is larger than the diameter of the conductor core of the signal line When the power line is a coaxial cable and the signal line is a twisted pair cable, the diameter of the conductor core wire of the power supply line is larger than the diameter of the conductor core wire of the signal line in the signal transmission line.
The ribbon cable according to claim 3, wherein when the signal line and the power line are both twisted pair cables, the adjacent signal transmission lines and the adjacent power transmission lines Fitting between and/or between the adjacent signal transmission lines and power transmission lines.
A ribbon cable according to claim 1, characterized in that: the reinforcing thread is cotton thread, nylon thread or bulletproof thread.
The ribbon cable according to claim 1, wherein the signal wire is arranged between the power wire and the reinforcement wire.
A ribbon cable according to claim 4 or 7, characterized in that: the material of the insulating layer is a polyfluorine material.