Vehicle-mounted flexible flat cable

Abstract

The utility model discloses a vehicle-mounted flexible flat cable, which comprises an upper base material layer, a lower base material layer and a plurality of metal wires arranged between the upper base material layer and the lower base material layer, and the plurality of metal wires distributed at intervals are packaged between the upper base material layer and the lower base material layer through an adhesive layer. One end of each of the plurality of metal wires arranged side by side is electrically connected with a first connecting terminal, the other end of each of the plurality of metal wires is electrically connected with a second connecting terminal, and the middle section area of each metal wire extends in a wave shape, so that a plurality of wave crests arranged at equal intervals and a plurality of wave troughs arranged at equal intervals are formed. According to the vehicle-mounted flexible flat cable, on the basis that the weight is reduced and the flexibility is improved, the bending-resistant performance of the whole vehicle-mounted flexible flat cable, especially the bending-resistant performance of the metal wires, is further improved, so that the stability of signal transmission in the long-time use process is improved, and the overall anti-interference performance can also be improved.

Description

Technical Field

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

[0002] With the increase in automobile functions and the widespread application of electronic control technology, there are more and more electrical parts and wires. The number of circuits and power consumption in the car have increased significantly, and the wiring harness has become thicker and heavier, making it inconvenient to bend and install. If forced to bend, it will easily affect the stability of the cable signal transmission. Utility Model Content

[0003] The purpose of the utility model is to provide a vehicle-mounted flexible flat cable, which can further improve the overall bending resistance, especially the metal wire, on the basis of reducing weight and improving flexibility, thereby improving the stability of signal transmission during long-term use and improving the overall anti-interference performance.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a vehicle-mounted flexible flat cable, comprising: an upper substrate layer, a lower substrate layer and a plurality of metal wires arranged between the upper substrate layer and the lower substrate layer, wherein the plurality of metal wires distributed at intervals are encapsulated between the upper substrate layer and the lower substrate layer through an adhesive layer, and one end of each of the plurality of metal wires arranged side by side is electrically connected to a first connection terminal, and the other end of each of the plurality of metal wires is electrically connected to a second connection terminal, and the middle section of each of the metal wires extends in a wave shape, thereby forming a plurality of equally spaced peaks and a plurality of equally spaced troughs.

[0005] The further improved scheme in the above technical scheme is as follows:

[0006] 1. In the above solution, the middle section of each metal wire extends in the shape of a sine curve.

[0007] 2. In the above solution, the outer side of each metal wire is covered with an insulating layer.

[0008] 3. 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.

[0009] 4. 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.

[0010] 5. In the above solution, a second adhesive layer is disposed on the surface of the upper substrate layer or the lower substrate layer opposite to the adhesive layer, and a release film is applied to the side of the second adhesive layer opposite to the substrate layer.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] In the vehicle-mounted flexible flat cable of the utility model, one end of each of the plurality of metal wires arranged side by side is electrically connected to a first connection terminal, and the other end of each of the metal wires is electrically connected to a second connection terminal. The middle section of each of the metal wires extends in a wave shape, thereby forming a plurality of equally spaced wave crests and a plurality of equally spaced wave troughs. On the basis of reducing weight and improving flexibility, the overall bending resistance, especially the metal wires, can be further improved, thereby improving the stability of signal transmission during long-term use, and the overall anti-interference performance can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a schematic diagram of the structure of the vehicle-mounted flexible flat cable of the utility model;

[0014] Attached Figure 2 This is a partial structural diagram of the vehicle-mounted flexible flat cable of the utility model;

[0015] Attached Figure 3 It is a partial structural diagram of the first embodiment of the vehicle-mounted flexible flat cable of the utility model;

[0016] Attached Figure 4 It is a partial structural diagram of the second embodiment of the vehicle-mounted flexible flat cable of the utility model.

[0017] In the above figures: 1, upper substrate layer; 2, lower substrate layer; 3, metal wire; 31, insulation layer; 4, adhesive layer; 51, first connecting terminal; 52, second connecting terminal; 61, solder pad; 62, gold finger group; 7, second adhesive layer; 8, release film. Implementation

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A vehicle-mounted flexible flat cable, comprising: an upper substrate layer 1, a lower substrate layer 2, and a plurality of metal wires 3 disposed between the upper substrate layer 1 and the lower substrate layer 2, wherein the plurality of metal wires 3 are distributed at intervals and are encapsulated between the upper substrate layer 1 and the lower substrate layer 2 through an adhesive layer 4, wherein one end of each of the plurality of metal wires 3 disposed side by side is electrically connected to a first connection terminal 51, and the other end of each of the plurality of metal wires 3 is electrically connected to a second connection terminal 52, and the middle section of each of the metal wires 3 extends in a wave shape, thereby forming a plurality of equally spaced wave crests and a plurality of equally spaced wave troughs;

[0020] During the processing, the printing device and method for metal wires disclosed in the inventor's previous patent application (such as CN113968078A) are used to print micron-scale metal wires onto the substrate layer, and based on the printing processing method, the metal wires can be laid on the substrate layer in any shape.

[0021] The middle section of each of the metal wires 3 extends in the shape of a sine curve;

[0022] The metal wire is printed into a wavy shape, preferably a sine curve shape, so as to improve the bending resistance of the metal wire in all directions and avoid damage or even breakage of the metal wire due to local twisting.

[0023] Each of the metal wires 3 is coated with an insulating layer 31 on its outer side.

[0024] One end of each of the first connection terminal 51 and the second connection terminal 52 has a plurality of pads 61 corresponding to the metal wires 3 , and each of the pads 61 is connected to the end of the corresponding metal wire 3 by soldering with solder paste.

[0025] 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 .

[0026] A second adhesive layer 7 is arranged on the surface of the upper substrate layer 1 opposite to the adhesive layer 4, and a release film 8 is applied to the second adhesive layer 7 opposite to the substrate layer. After peeling off the release film, the exposed second 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.

[0027] The diameter of the metal wire 3 is 70 μm.

[0028] Embodiment 2: A vehicle-mounted flexible flat cable, comprising: an upper substrate layer 1, a lower substrate layer 2, and a plurality of metal wires 3 disposed between the upper substrate layer 1 and the lower substrate layer 2, wherein the plurality of metal wires 3 are spaced apart and encapsulated between the upper substrate layer 1 and the lower substrate layer 2 through an adhesive layer 4, wherein one end of each of the plurality of metal wires 3 disposed side by side is electrically connected to a first connection terminal 51, and the other end of each of the plurality of metal wires 3 is electrically connected to a second connection terminal 52, and the middle section of each of the metal wires 3 extends in a wave shape, thereby forming a plurality of equally spaced wave crests and a plurality of equally spaced wave troughs;

[0029] For the adhesive layer, the adhesive layer can be obtained by coating on the lower substrate layer, the metal wire can be printed on the adhesive layer that has not yet been completely cured, and then the upper 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 passed through the adhesive first and then printed on the lower substrate layer, thereby forming an adhesive layer to achieve the connection and fixation between the upper and lower substrate layers and the metal wire.

[0030] The middle section of each of the metal wires 3 extends in the shape of a sine curve.

[0031] One end of each of the first connection terminal 51 and the second connection terminal 52 has a plurality of pads 61 corresponding to the metal wires 3 , and each of the pads 61 is connected to the end of the corresponding metal wire 3 by soldering with solder paste.

[0032] A second adhesive layer 7 is provided on the surface of the lower substrate layer 2 opposite to the adhesive layer 4, and a release film 8 is applied to the side of the second adhesive layer 7 opposite to the substrate layer. The flat and highly flexible wire body can be fixed by whole-surface pasting and has good adherence. It can be bent and changed with the shape of the object to be pasted, and has good installation stability and orderliness.

[0033] The plurality of metal wires 3 are arranged at equal intervals.

[0034] The metal wire 3 is a copper wire;

[0035] Using nano-level copper wires and laying them in a wavy shape can not only improve the overall flexibility and bending resistance, but also improve the anti-interference performance to a certain extent, especially the mutual interference between adjacent metal wires. It can also simplify the processing technology and reduce the processing cost, so that the line 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.

[0036] The end surface of the metal wire 3 is circular;

[0037] Using nano-level copper wires and laying them in a wavy shape can not only improve the overall flexibility and bending resistance, but also improve the anti-interference performance to a certain extent, especially the mutual interference between adjacent metal wires. It can also simplify the processing technology and reduce the processing cost, so that the line 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.

[0038] The diameter of the metal wire 3 is 40 μm.

[0039] The principle of the utility model is described as follows:

[0040] 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;

[0041] As for the adhesive layer, the adhesive layer can be obtained by coating on the lower substrate layer, the metal wire can be printed on the adhesive layer that has not yet been completely cured, and then the upper 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 lower substrate layer, thereby forming an adhesive layer to achieve the connection and fixation between the upper and lower substrate layers and the metal wire;

[0042] 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 improve the anti-interference performance to a certain extent, especially the mutual interference between adjacent metal wires. It can 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.

[0043] The flat and highly flexible wire can be fixed by whole-surface pasting and has good adhesion. It can bend and change with the shape of the object to be pasted, and has good installation stability and orderliness.

[0044] When the above-mentioned vehicle-mounted soft flat cable is used, it can further improve the overall bending resistance, especially 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 improve the overall anti-interference performance.

[0045] 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 vehicle-mounted flexible flat cable, comprising: An upper substrate layer (1), a lower substrate layer (2) and a plurality of metal wires (3) arranged between the upper substrate layer (1) and the lower substrate layer (2), wherein the plurality of metal wires (3) are arranged at intervals and are encapsulated between the upper substrate layer (1) and the lower substrate layer (2) via an adhesive layer (4), characterized in that one end of each of the plurality of metal wires (3) arranged side by side is electrically connected to a first connection terminal (51), and the other end of each of the plurality of metal wires (3) is electrically connected to a second connection terminal (52), and the middle section of each of the metal wires (3) extends in a wave shape, thereby forming a plurality of equally spaced wave crests and a plurality of equally spaced wave troughs.

2. The vehicle-mounted flexible flat cable according to claim 1, characterized in that: The middle section of each metal wire (3) extends in the shape of a sine curve.

3. The vehicle-mounted flexible flat cable according to claim 1, characterized in that: The outer side of each metal wire (3) is coated with an insulating layer (31).

4. The vehicle-mounted flexible flat cable according to claim 1, 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 wire (3) at one end, and each of the solder pads (61) is connected to the end of the corresponding metal wire (3) by soldering with solder paste.

5. The vehicle-mounted flexible flat cable according to claim 4, 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).

6. The vehicle-mounted flexible flat cable according to claim 1, characterized in that: A second adhesive layer (7) is provided on the surface of the upper substrate layer (1) or the lower substrate layer (2) opposite to the adhesive layer (4), and a release film (8) is applied to the side of the second adhesive layer (7) opposite to the substrate layer.

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