Bending-resistant flat cable

Abstract

The utility model discloses a bending-resistant flat cable which comprises a first base material layer, a second base material layer and a third base material layer which are sequentially stacked, and a plurality of first metal wires are packaged between the first base material layer and the second base material layer through a first adhesive layer. A plurality of second metal wires are packaged between the second base material layer and the third base material layer through a second adhesive layer, and the plurality of first metal wires arranged side by side and the plurality of second metal wires arranged side by side are arranged in a staggered mode in the arrangement direction of the first metal wires and the second metal wires. The middle section areas of the first metal wires and the second metal wires extend in a wave shape. According to the bending-resistant flat cable, on the basis of reducing the weight and improving the flexibility, the bending-resistant performance of the whole flat cable, especially the bending-resistant performance of the metal wires, is further improved, so that the stability of signal transmission in a long-time use process is improved, mutual interference between adjacent wires can be avoided while the distance between the wires is reduced, and the service life of the flat cable is prolonged. And the stability of signal transmission is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cables, in particular to a bending-resistant flat cable. Background Art

[0002] As flat cables are used to connect electrical and electronic components in automobiles and transmit signals, it is necessary to ensure both the transmission of electrical signals and the reliability of the connection circuits.

[0003] The cables in the prior art are getting heavier and heavier, and are not easy to bend and install. In addition, the spacing between adjacent wires is small, which makes it easy for them to interfere with each other, affecting the stability of signal transmission. Utility Model Content

[0004] The purpose of the utility model is to provide a bending-resistant flat cable, which can further improve the overall bending resistance, especially the bending resistance of the metal wire, on the basis of reducing weight and improving flexibility, thereby improving the stability of signal transmission during long-term use, and can also avoid mutual interference between adjacent wires while reducing the wire spacing, further improving the stability of signal transmission.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a bending-resistant cable, comprising: a first substrate layer, a second substrate layer and a third substrate layer stacked in sequence, a plurality of first metal wires are encapsulated between the first substrate layer and the second substrate layer through a first adhesive layer, a plurality of second metal wires are encapsulated between the second substrate layer and the third substrate layer through a second adhesive layer, a plurality of first metal wires arranged side by side and a plurality of second metal wires arranged side by side are staggered in the direction of their arrangement, and the middle sections of the first metal wires and the second metal wires extend in a wavy shape, thereby forming a plurality of equally spaced peaks and a plurality of equally spaced troughs on each metal wire.

[0006] The further improved scheme in the above technical scheme is as follows:

[0007] 1. In the above solution, the middle section of each metal wire extends in the shape of a sine curve.

[0008] 2. In the above solution, the outer side of each metal wire is covered with an insulating layer.

[0009] 3. In the above solution, the same end of each of the plurality of first metal wires and the plurality of second metal wires is electrically connected to a first connection terminal, and the other end of each of the plurality of first metal wires and the plurality of second metal wires is electrically connected to a second connection terminal.

[0010] 4. In the above solution, one end of each of the first connection terminal and the second connection terminal has a plurality of pads corresponding to the metal wires, and each of the pads is connected to the end of the corresponding metal wire by soldering with solder paste.

[0011] 5. In the above solution, a gold finger group for external electrical connection is provided on the other end of each of the first connection terminal and the second connection terminal.

[0012] 6. In the above solution, the diameter of the metal wire is 10μm~100μm.

[0013] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0014] The utility model is a bending-resistant cable, in which a plurality of first metal wires are encapsulated between the first substrate layer and the second substrate layer by a first adhesive layer, and a plurality of second metal wires are encapsulated between the second substrate layer and the third substrate layer by a second adhesive layer. The plurality of first metal wires arranged side by side and the plurality of second metal wires arranged side by side are staggered in the direction of their arrangement, and the middle sections of the first metal wires and the second metal wires extend in a wave shape, so that a plurality of equally spaced peaks and a plurality of equally spaced troughs are formed on each metal wire. On the basis of reducing weight and improving flexibility, the overall bending resistance, especially the metal wire, can be further improved, thereby improving the stability of signal transmission during long-term use, and can also avoid mutual interference between adjacent wires while reducing the wire spacing, thereby further improving the stability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a schematic diagram of the structure of the bending-resistant cable of the utility model;

[0016] Attached Figure 2 It is a partial structural diagram of the bending-resistant cable of the utility model;

[0017] Attached Figure 3 It is a partial structural schematic diagram of the first embodiment of the bending-resistant cable of the utility model;

[0018] Attached Figure 4 It is a partial structural schematic diagram of the second embodiment of the bending-resistant cable of the utility model.

[0019] In the above figures: 1, upper substrate layer; 2, lower substrate layer; 31, first metal wire; 32, second metal wire; 33, insulating layer; 41, first adhesive layer; 42, second adhesive layer; 51, first connecting terminal; 52, second connecting terminal; 61, solder pad; 62, gold finger group; 7, third adhesive layer; 8, third substrate layer; 9, release film. DETAILED DESCRIPTION

[0020] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0021] Embodiment 1: A bending-resistant cable, comprising: a first substrate layer 1, a second substrate layer 2 and a third substrate layer 8 stacked in sequence, a plurality of first metal wires 31 being encapsulated between the first substrate layer 1 and the second substrate layer 2 by a first adhesive layer 41, and a plurality of second metal wires 32 being encapsulated between the second substrate layer 2 and the third substrate layer 8 by a second adhesive layer 42, characterized in that: a plurality of first metal wires 31 arranged side by side and a plurality of second metal wires 32 arranged side by side are staggered in the direction of their arrangement, and the middle sections of the first metal wires 31 and the second metal wires 32 extend in a wave shape, so that a plurality of equally spaced wave crests and a plurality of equally spaced wave troughs are formed on each metal wire;

[0022] By packaging the metal wires in two layers and staggering the wires between the two layers, the distance between the wires can be reduced while effectively blocking the mutual interference between adjacent wires, reducing transmission attenuation and improving the stability of current transmission.

[0023] The middle section of each of the first metal wires 31 and the second metal wires 32 extends in the shape of a sine curve;

[0024] During the processing, the printing device and method for metal wires disclosed in the inventor's previously applied patents (such as CN113968078A) are used to print micron-level metal wires onto the substrate layer. Based on the printing processing method, the metal wires can be laid on the substrate layer in any shape. Therefore, the metal wires can be printed into a wavy shape, preferably a sinusoidal shape, thereby improving the bending resistance of the metal wires in all directions and avoiding damage or even breakage of the metal wires due to local distortion.

[0025] Each of the first metal wires 31 and the second metal wires 32 is coated with an insulating layer 33 on its outer side.

[0026] The same end of each of the plurality of first metal wires 31 and the plurality of second metal wires 32 is electrically connected to a first connection terminal 51 , and the other end of each of the plurality of first metal wires 31 and the plurality of second metal wires 32 is electrically connected to a second connection terminal 52 .

[0027] Each of the first connection terminal 51 and the second connection terminal 52 has a plurality of pads 61 corresponding to the metal wires at one end, and each of the pads 61 is connected to the end of the corresponding metal wire by soldering with solder paste.

[0028] A gold finger group 62 for electrical connection with the outside is disposed on the other end of each of the first connection terminal 51 and the second connection terminal 52 .

[0029] The diameter of the metal wire is 30 μm.

[0030] A third adhesive layer 7 is disposed on the surface of the first substrate layer 1 opposite to the adhesive layer, and a release film 9 is attached to a side of the third adhesive layer 7 opposite to the substrate layer.

[0031] Embodiment 2: A bending-resistant cable, comprising: a first substrate layer 1, a second substrate layer 2 and a third substrate layer 8 stacked in sequence, a plurality of first metal wires 31 being encapsulated between the first substrate layer 1 and the second substrate layer 2 by a first adhesive layer 41, and a plurality of second metal wires 32 being encapsulated between the second substrate layer 2 and the third substrate layer 8 by a second adhesive layer 42, characterized in that: a plurality of first metal wires 31 arranged side by side and a plurality of second metal wires 32 arranged side by side are staggered in the direction of their arrangement, and the middle sections of the first metal wires 31 and the second metal wires 32 extend in a wave shape, so that a plurality of equally spaced wave crests and a plurality of equally spaced wave troughs are formed on each metal wire;

[0032] For the adhesive layer, the adhesive layer can be obtained by coating on a substrate layer, the metal wire can be printed on the adhesive layer that has not yet been completely cured, and then another substrate layer can be covered and bonded to the other side of the printed metal wire; or the metal wire to be printed can be first passed through the adhesive and then printed onto the substrate layer, thereby forming an adhesive layer to achieve the connection and fixation between the two substrate layers and the metal wires between them.

[0033] The middle section of each of the first metal wires 31 and the second metal wires 32 extends in a sinusoidal shape.

[0034] The same end of each of the plurality of first metal wires 31 and the plurality of second metal wires 32 is electrically connected to a first connection terminal 51 , and the other end of each of the plurality of first metal wires 31 and the plurality of second metal wires 32 is electrically connected to a second connection terminal 52 .

[0035] The diameter of the metal wire is 80 μm.

[0036] The plurality of first metal wires 31 and the plurality of second metal wires 32 are arranged at equal intervals.

[0037] The first metal wire 31 and the second metal wire 32 are both copper wires;

[0038] Using nano-level copper wires and laying them in a wavy shape can not only improve the overall flexibility and bending resistance, but also simplify the processing technology and reduce processing costs, so that the wire length can be processed to 2 meters to meet most usage scenarios, such as electric vehicles, large-size touch blackboards, multi-axis robot arms, etc.

[0039] The end surfaces of the first metal wire 31 and the second metal wire 32 are both circular.

[0040] A third adhesive layer 7 is arranged on the surface of the third substrate layer 8 opposite to the adhesive layer, and a release film 9 is applied to the side of the third adhesive layer 7 opposite to the substrate layer. After peeling off the release film, the exposed third adhesive layer can realize the bonding and fixing of the wire body to the outside, which is convenient for the installation of the wire body and has good conformability and stability after installation, and is not easy to be messy.

[0041] The principle of the utility model is described as follows:

[0042] During the processing, the printing device and method for metal wires disclosed in the inventor's previously applied patents (such as CN113968078A) are used to print micron-sized metal wires onto the substrate layer. Based on the printing processing method, the metal wires can be laid on the substrate layer in any shape. Therefore, the metal wires can be printed into a wavy shape, preferably a sine curve shape, thereby improving the bending resistance of the metal wires in all directions and avoiding the damage or even breakage of the metal wires due to local distortion. The substrate layer can be any one of PET substrate, PVC substrate, PE substrate, PBT substrate or PI substrate, preferably PET substrate;

[0043] As for the adhesive layer, the adhesive layer can be obtained by coating on one substrate layer, the metal wire can be printed on the adhesive layer that has not yet been completely cured, and then another substrate layer can be covered and bonded to the other side of the printed metal wire; or the metal wire to be printed can be first passed through the adhesive and then printed on the substrate layer, thereby forming an adhesive layer to achieve connection and fixation between the two substrate layers and the metal wire between them;

[0044] Compared with the millimeter-level aluminum metal wire or tinned metal wire obtained by stamping and other processes in the prior art FFC, the use of nano-level copper wire and laying it in a wavy shape can not only improve the overall flexibility and bending resistance, but also simplify the processing technology and reduce the processing cost, so that the wire length can be processed to 2 meters to meet most usage scenarios, such as electric vehicles, large-size touch blackboards, multi-axis robot arms, etc.

[0045] The flat and highly flexible wire can be fixed by pasting the entire surface and has good adhesion. It can be bent and changed with the shape of the object to be pasted, and the installation is stable and orderly.

[0046] By packaging the metal wires in two layers and staggering the wires between the two layers, the distance between the wires can be reduced while effectively blocking the mutual interference between adjacent wires, reducing transmission attenuation and improving the stability of current transmission.

[0047] When the above-mentioned bend-resistant flat cable is used, it can further improve the overall bending resistance, especially the bending resistance of the metal wire, on the basis of reducing weight and improving flexibility, thereby improving the stability of signal transmission during long-term use. It can also avoid mutual interference between adjacent wires while reducing the wire spacing, further improving the stability of signal transmission.

[0048] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A bending-resistant cable, comprising: A first substrate layer (1), a second substrate layer (2) and a third substrate layer (8) are stacked in sequence, a plurality of first metal wires (31) are encapsulated between the first substrate layer (1) and the second substrate layer (2) via a first adhesive layer (41), and a plurality of second metal wires (32) are encapsulated between the second substrate layer (2) and the third substrate layer (8) via a second adhesive layer (42), characterized in that: a plurality of first metal wires (31) arranged side by side and a plurality of second metal wires (32) arranged side by side are arranged alternately in the direction of their arrangement, and the middle sections of the first metal wires (31) and the second metal wires (32) extend in a wave shape, so that a plurality of wave crests and a plurality of wave troughs arranged at equal intervals are formed on each metal wire.

2. The bending-resistant cable according to claim 1, characterized in that: The middle section of each of the first metal wires (31) and the second metal wires (32) extends in the shape of a sine curve.

3. The bending-resistant cable according to claim 1, characterized in that: The outer side of each of the first metal wires (31) and the second metal wires (32) is coated with an insulating layer (33).

4. The bending-resistant cable according to claim 1, characterized in that: The same end of each of the plurality of first metal wires (31) and the second metal wires (32) is electrically connected to a first connection terminal (51), and the other end of each of the plurality of first metal wires (31) and the second metal wires (32) is electrically connected to a second connection terminal (52).

5. The bending-resistant cable according to claim 4, characterized in that: Each of the first connecting terminal (51) and the second connecting terminal (52) has a plurality of solder pads (61) corresponding to the metal wires at one end, and each of the solder pads (61) is connected to the end of the corresponding metal wire by soldering with solder paste.

6. The bending-resistant cable according to claim 5, characterized in that: A gold finger group (62) for electrical connection with the outside is provided on the other end of each of the first connection terminal (51) and the second connection terminal (52).

7. The bending-resistant flat cable according to any one of claims 1 to 6, characterized in that: The diameter of the metal wire is 10 μm-100 μm.

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