Flexible flat cable harness

Abstract

The invention provides a flexible flat cable harness, which relates to the field of cables and comprises a first wire, a second wire and a tension detection part, the first wire comprises a plurality of first flat wires arranged in parallel, a first upper insulating layer and a first lower insulating layer; the second wire comprises a plurality of second flat wires arranged in parallel, a second upper insulating layer and a second lower insulating layer; the first wire is arranged on the upper side of the second wire, or the first wire and the second wire are arranged side by side; the left end of the first wire and the left end of the second wire are connected with the same first plug, the right end of the first wire is connected with the second plug, and the right end of the second wire is connected with the third plug. The tension detection part is arranged on the first wire and / or the second wire and used for detecting the tension of the first wire and / or the second wire. The flexible flat cable harness has the advantages of being light in weight and flat, tension detection is achieved on the premise that the layout and the size of the wires are not changed, and the integration degree of the whole system is improved.

Description

Technical Field

[0001] The present invention relates to the field of cables, in particular to a flexible wiring harness. Background Art

[0002] Conventional connector harnesses cover different wiring relationships, and each corresponding one requires a separate wire connection, which makes the product bulky and unsuitable, and the overall weight is high; the shielding layer uses shielding tape, which makes the harness product larger and unable to meet the needs of product use, and the electromagnetic interference effect is poor. With the upgrade of equipment, the production requirements of conventional connector harnesses can no longer meet the transmission of equipment signals, and higher requirements are placed on lightweight, flat, miniaturized, and integrated. In addition, the existing connector harnesses do not have a tensile force detection function, and may be pulled by the outside during the use of the harness, causing the harness to fall off or break. Therefore, in response to the above technical problems, the present application provides a lightweight, flat, and flexible wiring harness with a tensile force detection function. Summary of the Invention

[0003] In view of the above technical problems, the present invention provides a flexible wiring harness, comprising: a first conductor, a second conductor and a tension detection unit;

[0004] The first conductor includes a plurality of first flat conductors arranged in parallel, a first upper insulating layer, and a first lower insulating layer; the first upper insulating layer is provided on the upper side of the first flat conductor, and the first lower insulating layer is provided on the lower side of the first flat conductor;

[0005] The second conductor includes a plurality of second flat conductors arranged in parallel, a second upper insulating layer, and a second lower insulating layer; the second upper insulating layer is provided on the upper side of the second flat conductor, and the second lower insulating layer is provided on the lower side of the second flat conductor;

[0006] The first wire is arranged on the upper side of the second wire, or the first wire and the second wire are arranged side by side; the left end of the first wire and the left end of the second wire are connected to the same first plug, the right end of the first wire is connected to the second plug, and the right end of the second wire is connected to the third plug;

[0007] The tension detection portion is provided on the first conductive wire and / or the second conductive wire, and is used to detect the tension of the first conductive wire and / or the second conductive wire.

[0008] Optionally, the first flat wire and the second flat wire have the same height and width.

[0009] Optionally, the first upper insulating layer, the first lower insulating layer, the second upper insulating layer, and the second lower insulating layer are made of the same material.

[0010] Optionally, the first upper insulating layer, the first lower insulating layer, the second upper insulating layer and the second lower insulating layer are all provided with grooves matching the flat wires, and the flat wires are combined with the insulating layers in an embedded manner.

[0011] Optionally, when the first wire is arranged on the upper side of the second wire, the left side of the first wire is bonded to the left side of the second wire by glue; the right side of the first wire is separated from the right side of the second wire; the first flat wire and the second flat wire are staggered.

[0012] Optionally, when the first wire and the second wire are arranged side by side, the first flat wire is located in the middle and the second flat wire is located on both sides of the first flat wire; the first flat wire and the second flat wire share the first upper insulating layer and the first lower insulating layer.

[0013] Optionally, a shielding layer is provided on the upper side and / or the lower side of the first conductive wire and the second conductive wire.

[0014] Optionally, the tension detection portion includes a strain portion, a first elastic insulating layer, a stretchable wire, and a second elastic insulating layer;

[0015] The strain portion includes a first strain resistor, a second strain resistor, a third strain resistor, a fourth strain resistor and an X-shaped conductive member;

[0016] The first strain resistor, the second strain resistor, the third strain resistor, and the fourth strain resistor are all double S-shaped resistors, which include two S-shaped resistors connected in series up and down; the first strain resistor and the second strain resistor are symmetrically arranged on both sides of the Y axis; the fourth strain resistor and the second strain resistor are symmetrically arranged on both sides of the X axis; and the third strain resistor and the first strain resistor are symmetrically arranged on both sides of the X axis; wherein the X axis is the transverse centerline of the tension detection portion, the Y axis is the longitudinal centerline of the tension detection portion, and the transverse direction is the extension direction of the first wire or the second wire;

[0017] The stretchable wire includes an intermittent wire and a curved wire; the intermittent wires are arranged on both sides of the curved wire; the number of the intermittent wires is two; the number of the curved wires is multiple, and the total number and positions of the intermittent wires and the curved wires correspond to the total number and positions of the first flat wire or the second flat wire; the curved wire has straight portions on both sides and a wavy curved portion in the middle, and the length of the wavy curved portion is the same as the length of the interruption of the intermittent wire;

[0018] The discontinuous conductive line includes a first terminal at the lower left position, a second terminal at the lower right position, a third terminal at the upper left position, and a fourth terminal at the upper right position; the first terminal and the second terminal are coaxially arranged; the third terminal and the fourth terminal are coaxially arranged; the first terminal is connected to the outer end point of the first strain resistor, the second terminal is connected to the outer end point of the second strain resistor, the third terminal is connected to the outer end point of the third strain resistor, and the fourth terminal is connected to the outer end point of the fourth strain resistor;

[0019] The four endpoints of the X-shaped conductive member are respectively connected to the inner endpoints of the first strain resistor, the second strain resistor, the third strain resistor, and the fourth strain resistor at corresponding positions.

[0020] Optionally, the strain portion, the first elastic insulating layer, the stretchable wire and the second elastic insulating layer are arranged in sequence from top to bottom, and the first elastic insulating layer is used to isolate the strain portion and the stretchable wire except the connection end points; the upper side of the strain portion is covered with a flexible protective layer.

[0021] Optionally, the first strain resistor is alternately arranged on both sides of the top surface and the bottom surface of the curved wire, and the two do not contact each other; the second strain resistor, the third strain resistor and the fourth strain resistor are arranged in the same manner as the first strain resistor; the strain part and the stretchable wire are cast and covered by the first elastic insulating layer, and are insulated and isolated; the overall thickness of the tension detection part is the same as the thickness of the first wire or the second wire.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] 1. A flat, flexible wiring harness structure is used, with a single-layer wire thickness of 0.2-0.5mm, meeting the needs of most flat-space equipment. This flexible wiring harness overcomes the drawbacks of previous flying wire configurations and improves system simplicity. By connecting different plugs, the flexible wiring harness enables electrical connections between compartments or components, ensuring the proper interconnection and transmission of signals such as power supply, switch acquisition signals, ignition drive signals, video, and communication data.

[0024] 2. The flexible wiring harness features a tension detection function. The tension detection unit can detect tension across the entire cross-section of the wire, improving detection accuracy. The tension detection unit is integrated with the wire, enabling tension detection without changing the wire layout or dimensions, thus improving overall system integration. Users can connect the corresponding terminal blocks as needed, enhancing convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A schematic diagram of a first structure of a flexible wiring harness provided by an embodiment of the present invention;

[0026] Figure 2 A left side view of a first structure of a flexible wiring harness provided by one embodiment of the present invention;

[0027] Figure 3 A schematic diagram of a second structure of a flexible wiring harness provided by an embodiment of the present invention;

[0028] Figure 4 The left side is a schematic diagram of the second structure of a flexible wiring harness provided by one embodiment of the present invention;

[0029] Figure 5 A schematic structural diagram of a flexible wiring harness provided by one embodiment of the present invention in practical application;

[0030] Figure 6 A schematic structural diagram of a tension detection unit in a flexible wiring harness provided by one embodiment of the present invention;

[0031] Figure 7 A schematic structural diagram of a strain gauge in a flexible wiring harness according to an embodiment of the present invention;

[0032] Figure 8 A schematic structural diagram of a stretchable conductor in a flexible wiring harness provided by one embodiment of the present invention;

[0033] Figure 9 A schematic structural diagram of a single-sided layout of a strain relief portion in a flexible wiring harness provided by one embodiment of the present invention;

[0034] Figure 10 This is a schematic structural diagram of an alternately arranged strain relief layout in a flexible wiring harness provided by one embodiment of the present invention.

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] like Figures 1-10 As shown, an embodiment of the present invention provides a flexible wiring harness, comprising: a first conductor 1, a second conductor 2, and a tension detection unit 3;

[0038] The first conductor 1 includes a plurality of parallel first flat conductors 11, a first upper insulating layer 12, and a first lower insulating layer 13; the first upper insulating layer 12 is provided on the upper side of the first flat conductor 11, and the first lower insulating layer 13 is provided on the lower side of the first flat conductor 11;

[0039] The second conductor 2 includes a plurality of parallel second flat conductors 21, a second upper insulating layer 22, and a second lower insulating layer 23. The second upper insulating layer 22 is provided on the upper side of the second flat conductor 21, and the second lower insulating layer 23 is provided on the lower side of the second flat conductor 21.

[0040] The first wire 1 is arranged on the upper side of the second wire 2 (the first structure, such as Figure 1 ), or, the first conductor 1 and the second conductor 2 are arranged side by side (the second structure, such as Figure 3 ); The left end of the first wire 1 and the left end of the second wire 2 are connected to the same first plug 5 (such as Figure 5 ), the right end of the first wire 1 is connected to the second plug 6, and the right end of the second wire 2 is connected to the third plug 7;

[0041] The tension detection unit 3 is provided on the first conductive wire 1 and / or the second conductive wire 2 , and is used to detect the tension of the first conductive wire 1 and / or the second conductive wire 2 .

[0042] Optionally, the first flat wire 11 and the second flat wire 21 have the same height and width; the first flat wire 11 and the second flat wire 21 are both made of copper.

[0043] Optionally, the first upper insulating layer 12 , the first lower insulating layer 13 , the second upper insulating layer 22 and the second lower insulating layer 23 are made of the same material, which includes saturated polyester resin, polyimide, polyurethane, etc.

[0044] Optionally, the first upper insulating layer 12 , the first lower insulating layer 13 , the second upper insulating layer 22 and the second lower insulating layer 23 are all provided with grooves matching the flat wires, and the flat wires are combined with the insulating layers in an embedded manner.

[0045] Optionally, when the first wire 1 is arranged on the upper side of the second wire 2, the left side of the first wire 1 is bonded to the left side of the second wire 2 by glue; the right side of the first wire 1 is separated from the right side of the second wire 2; the first flat wire 11 and the second flat wire 21 are staggered (such as Figure 2 ).

[0046] Optionally, when the first wire 1 and the second wire 2 are arranged side by side, the first flat wire 11 is located in the middle, and the second flat wire 21 is located on both sides of the first flat wire 11; the first flat wire 11 and the second flat wire 21 share the first upper insulating layer 12 and the first lower insulating layer 13 (such as Figure 4 ).

[0047] Optionally, a shielding layer 4 is provided on the upper side and / or the lower side of the first conductive wire 1 and the second conductive wire 2 ; the shielding layer 4 may be copper foil or the like.

[0048] Optionally, the tension detection unit 3 includes a strain portion 31, a first elastic insulating layer 32, a stretchable wire 33 and a second elastic insulating layer 34 (eg Figure 6 );

[0049] The strain part 31 includes a first strain resistor 311, a second strain resistor 312, a third strain resistor 313, a fourth strain resistor 314 and an X-shaped conductive member 315 (such as Figure 7 );

[0050] The first strain resistor 311, the second strain resistor 312, the third strain resistor 313, and the fourth strain resistor 314 are all double S-shaped resistors, which include two S-shaped resistors connected in series up and down; the first strain resistor 311 and the second strain resistor 312 are symmetrically arranged on both sides of the Y axis; the fourth strain resistor 314 and the second strain resistor 312 are symmetrically arranged on both sides of the X axis; and the third strain resistor 313 and the first strain resistor 311 are symmetrically arranged on both sides of the X axis; wherein the X axis is the transverse centerline of the tension detection portion 3, the Y axis is the longitudinal centerline of the tension detection portion 3, and the transverse direction is the extension direction of the first wire 1 or the second wire 2;

[0051] The stretchable wire 33 includes a discontinuous wire 331 and a curved wire 332 (such as Figure 8 ); the intermittent wires 331 are arranged on both sides of the curved wire 332; the number of the intermittent wires 331 is two; the number of the curved wires 332 is multiple, and the total number and positions of the intermittent wires 331 and the curved wires 332 correspond to the total number and positions of the first flat wire 11 or the second flat wire 21; the curved wire 332 has straight portions on both sides and a wavy curved portion in the middle, and the length of the wavy curved portion is the same as the length of the interruption of the intermittent wire 331;

[0052] The intermittent wire 331 includes a first terminal 331a at the lower left, a second terminal 331b at the lower right, a third terminal 331c at the upper left, and a fourth terminal 331d at the upper right. The first terminal 331a and the second terminal 331b are coaxially arranged. The third terminal 331c and the fourth terminal 331d are coaxially arranged. The first terminal 331a is connected to the outer end point of the first strain gauge resistor 311, the second terminal 331b is connected to the outer end point of the second strain gauge resistor 312, the third terminal 331c is connected to the outer end point of the third strain gauge resistor 313, and the fourth terminal 331d is connected to the outer end point of the fourth strain gauge resistor 314.

[0053] The four endpoints of the X-shaped conductive member 315 are respectively connected to the inner endpoints of the first strain resistor 311 , the second strain resistor 312 , the third strain resistor 313 , and the fourth strain resistor 314 at corresponding positions.

[0054] Optionally, the strain portion 31, the first elastic insulating layer 32, the stretchable wire 33 and the second elastic insulating layer 34 are arranged in sequence from top to bottom (single-sided layout, such as Figure 9 ), the first elastic insulating layer 32 is used to isolate the strain portion 31 and the stretchable wire 33 except the connection end point; the upper side of the strain portion 31 is covered with a flexible protective layer 35.

[0055] Optionally, the first strain resistors 311 are alternately arranged on both sides of the top surface and the bottom surface of the curved wire 332, and the two do not contact each other (alternate arrangement layout, such as Figure 10 ); the second strain resistor 312, the third strain resistor 313 and the fourth strain resistor 314 are arranged in the same manner as the first strain resistor 311; the strain portion 31 and the stretchable wire 33 are cast and coated by the first elastic insulating layer 32 for insulation isolation; the overall thickness of the tension detection portion 3 is the same as the thickness of the first wire 1 or the second wire 2.

[0056] Optionally, the "\ portion" and the " / portion" in the X-shaped conductive member 315 are arranged in layers and connected through a conductive ring arranged in the middle, and the conductive ring does not contact the curved wire 332; the "\ portion" and the " / portion" are respectively arranged on both sides of the top surface and the bottom surface of the curved wire 332.

[0057] Optionally, the first elastic insulating layer 32 and the second elastic insulating layer 34 are made of the same material; the elastic modulus of the first elastic insulating layer 32 is less than or equal to the elastic modulus of the first upper insulating layer 12 .

[0058] Optionally, the first strain resistor 311 , the second strain resistor 312 , the third strain resistor 313 and the fourth strain resistor 314 are made of single-layer or multi-layer conductive graphene, and the resistance of the conductive graphene increases with increasing deformation.

[0059] Optionally, the tension detection part 3 is integrated with the first wire 1 or the second wire 2, and the intermittent wire 331 and the curved wire 332 have the same cross-sectional dimensions as the first flat wire 11 or the second flat wire 21, and the intermittent wire 331 and the curved wire 332 are part of the first flat wire 11 or the second flat wire 21.

[0060] Optionally, the resistance of the first strain resistor 311 is R1, the resistance of the second strain resistor 312 is R2, the resistance of the third strain resistor 313 is R3, and the resistance of the fourth strain resistor 314 is R4; in the initial state (when no force is applied), R1=R2=R3=R4.

[0061] Working principle of tension detection unit 3:

[0062] When the detection end uses two terminals: when the detection end is connected to the first terminal 331a and the third terminal 331c, the tension of the entire longitudinal section of the first wire 1 or the second wire 2 is detected by the overall change of R1 and R3; when the detection end is connected to the first terminal 331a and the fourth terminal 331d, the tension of the entire longitudinal section of the first wire 1 or the second wire 2 is detected by the overall change of R1 and R4; when the detection end is connected to the second terminal 331b and the fourth terminal 331d, the tension of the entire longitudinal section of the first wire 1 or the second wire 2 is detected by the overall change of R2 and R4; when the detection end is connected to the second terminal 331b and the third terminal 331c, the tension of the entire longitudinal section of the first wire 1 or the second wire 2 is detected by the overall change of R2 and R3; the user can connect the above two terminals as needed to realize tension detection of the entire section;

[0063] When the detection terminal uses four terminals: the first and second terminals 331a and 331b detect the change in the overall resistance of R1 and R2, and the third and fourth terminals 331c and 331d detect the change in the overall resistance of R3 and R4. By comparing the resistance changes of R1+R2 and R3+R4, the force on the left and right sides of the wire is detected and whether the force on the left and right sides of the wire is balanced. Alternatively, the overall resistance change of R1+R2+R3+R4 can be detected using all four terminals to improve detection accuracy.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A flexible wiring harness, comprising: A first conductive wire, a second conductive wire, and a tension detection unit; The first conductive wire comprises a plurality of first flat conductive wires arranged in parallel, a first upper insulating layer and a first lower insulating layer; The first upper insulating layer is disposed on the upper side of the first flat wire, and the first lower insulating layer is disposed on the lower side of the first flat wire; The second conductor includes a plurality of second flat conductors arranged in parallel, a second upper insulating layer and a second lower insulating layer; the second upper insulating layer is arranged on the upper side of the second flat conductor, and the second lower insulating layer is arranged on the lower side of the second flat conductor; The first wire is arranged on the upper side of the second wire, or the first wire and the second wire are arranged side by side; the left end of the first wire and the left end of the second wire are connected to the same first plug, the right end of the first wire is connected to the second plug, and the right end of the second wire is connected to the third plug; The tension detection unit is disposed on the first conductive wire and / or the second conductive wire, and is used to detect the tension of the first conductive wire and / or the second conductive wire.

2. The flexible wiring harness according to claim 1, characterized in that: in, The first flat conductive wire and the second flat conductive wire have the same height and width.

3. The flexible wiring harness according to claim 2, characterized in that: in, The first upper insulating layer, the first lower insulating layer, the second upper insulating layer and the second lower insulating layer are made of the same material.

4. The flexible wiring harness according to claim 3, characterized in that: in, The first upper insulating layer, the first lower insulating layer, the second upper insulating layer and the second lower insulating layer are all provided with grooves matching with the flat wires, and the flat wires are combined with the insulating layers in an embedded manner.

5. The flexible wiring harness according to claim 4, characterized in that: in, When the first wire is arranged on the upper side of the second wire, the left side of the first wire is bonded to the left side of the second wire by glue; the right side of the first wire is separated from the right side of the second wire; the first flat wire and the second flat wire are staggered.

6. The flexible wiring harness according to claim 4, characterized in that: in, When the first wire and the second wire are arranged side by side, the first flat wire is located in the middle, and the second flat wire is located on both sides of the first flat wire; the first flat wire and the second flat wire share the first upper insulating layer and the first lower insulating layer.

7. The flexible wiring harness according to claim 4, characterized in that: in, A shielding layer is provided on the upper side and / or the lower side of the first conductive line and the second conductive line.

8. The flexible wiring harness according to claim 4, characterized in that: in, The tension detection portion includes a strain portion, a first elastic insulating layer, a stretchable wire and a second elastic insulating layer; The strain part includes a first strain resistor, a second strain resistor, a third strain resistor, a fourth strain resistor and an X-shaped conductive member; The first strain resistor, the second strain resistor, the third strain resistor and the fourth strain resistor are all double S-shaped resistors, and the double S-shaped resistor includes two S-shaped resistors connected in series up and down; the first strain resistor and the second strain resistor are symmetrically arranged on both sides of the Y axis; the fourth strain resistor and the second strain resistor are symmetrically arranged on both sides of the X axis; the third strain resistor and the first strain resistor are symmetrically arranged on both sides of the X axis; wherein the X axis is the transverse midline of the tension detection portion, the Y axis is the longitudinal midline of the tension detection portion, and the transverse direction is the extension direction of the first wire or the second wire; The stretchable wire includes an intermittent wire and a curved wire; the intermittent wire is arranged on both sides of the curved wire; the number of the intermittent wire is two; the number of the curved wire is multiple, and the total number and position of the intermittent wire and the curved wire correspond to the total number and position of the first flat wire or the second flat wire; the curved wire has straight parts on both sides and a wavy curved part in the middle, and the length of the wavy curved part is the same as the length of the interruption of the intermittent wire; The discontinuous conductive line comprises a first terminal at a lower left position, a second terminal at a lower right position, a third terminal at an upper left position, and a fourth terminal at an upper right position; the first terminal is coaxially arranged with the second terminal; the third terminal is coaxially arranged with the fourth terminal; the first terminal is connected to an outer end point of the first strain resistor, the second terminal is connected to an outer end point of the second strain resistor, the third terminal is connected to an outer end point of the third strain resistor, and the fourth terminal is connected to an outer end point of the fourth strain resistor; The four endpoints of the X-shaped conductive member are respectively connected to the inner endpoints of the first strain resistor, the second strain resistor, the third strain resistor and the fourth strain resistor at corresponding positions.

9. The flexible wiring harness according to claim 8, characterized in that: in, The strain portion, the first elastic insulating layer, the stretchable wire and the second elastic insulating layer are arranged in sequence from top to bottom, the first elastic insulating layer is used to isolate the strain portion and the stretchable wire except the connection end points; the upper side of the strain portion is covered with a flexible protective layer.

10. The flexible wiring harness according to claim 8, characterized in that: in, The first strain resistor is alternately arranged on both sides of the top surface and the bottom surface of the curved wire, and the two do not contact each other; the second strain resistor, the third strain resistor and the fourth strain resistor are arranged in the same manner as the first strain resistor; the strain part and the stretchable wire are cast and coated by the first elastic insulating layer, and are insulated and isolated; the overall thickness of the tension detection part is the same as the thickness of the first wire or the second wire.

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