Integrally-formed multi-layer flexible fabric circuit

Abstract

The invention belongs to the technical field of flexible circuits, and discloses an integrally formed multilayer flexible fabric circuit which comprises a main circuit I, a branch circuit I, a main circuit II and a branch circuit II according to functional layout classification, the main circuit I is connected with the branch circuit I, the main circuit II is connected with the branch circuit II, the main circuit I is not connected with the main circuit II, and the branch circuit II is connected with the branch circuit II. The branch circuit I is not connected with the branch circuit II; the main circuit I and the main circuit II define a [-shaped area, and the branch circuit I and the branch circuit II are both located in the area. According to composition and structure classification, the warp knitting fabric comprises an insulating warp knitting fabric, and a single conductive yarn a, a single conductive yarn b and a plurality of conductive yarns X which are simultaneously positioned inside the insulating warp knitting fabric; the conductive yarn a and the conductive yarn b are respectively weft yarns which are lined into the insulated warp knitting fabric from the left side and the right side. The fabric has the advantages of light weight, softness and breathability, is good in ductility, is integrally formed during weaving, and keeps the structural integrity and the yarn continuity.

Description

Technical Field

[0001] The invention belongs to the technical field of flexible circuits and relates to an integrally formed multi-layer flexible fabric circuit. Background Art

[0002] The rapid development of technologies related to smart textiles has made flexible circuits based on fabrics attract widespread attention due to their excellent flexibility and breathability, especially in the fields of motion recognition and health monitoring. Traditional smart textiles usually combine rigid materials or semiconductors with fabrics through thicker wires. Their shortcomings of being bulky, easy to wear and unable to deform with the fabric cannot meet the diversified needs of people's lives. Therefore, a flexible circuit that is light, soft and fits well with human skin has come into being. Flexible circuits are mainly composed of conductive materials such as metal nanoparticles, metal oxides, conductive polymers, etc., mixed with flexible substrates such as paper, films, silicone, etc., and usually have high elasticity and wear resistance, but poor air permeability. In contrast, flexible circuits based on fabrics have better flexibility and air permeability, can achieve deformations such as bending, twisting, stretching, etc. at any angle, and can meet the use requirements of daily life.

[0003] Currently, common methods for preparing flexible circuits include screen printing, inkjet printing and conductive yarn introduction.

[0004] Screen printing is mainly used to prepare fabric sensors. For example, patent application US20230181110A1 discloses a fabric circuit system for infant health monitoring, which specifically integrates a flexible printed circuit into a baby suit and connects a temperature sensor through a circuit layout design to transmit the collected temperature signal. Patent application US20230358570A1 discloses a strain sensing system for vehicles, which uses conductive ink to form a sensing circuit or a shielding circuit on a flexible insulating substrate such as a fabric by screen printing. The substrate is an elastic memory film or fabric, which can reduce the damage of the printed circuit on the fabric surface during repeated tension and relaxation. The document (Circuit design and performance of electrothermal composite fabrics [J]. Printing and Dyeing, 2020, 46(03): 1-4+14.) proposes a method of using silver paste as a conductive and heating material, printing a series or parallel circuit on a thermoplastic polyurethane (TPU) film by screen printing, and then using a second TPU film to fit and encapsulate it. Finally, two pieces of polyester fabric are used to composite the upper and lower surfaces to prepare a flexible electrothermal composite fabric. Its circuits are divided into two types: series and parallel, which serve as both conductive circuits and heating materials. Because two layers of film and two layers of fabric are used in combination, the final fabric has a large gram weight and is not breathable. Another prior art using a similar method is patent application CN202310911132.9, which discloses a large-size double / multi-layer flexible fabric base film circuit and a preparation method thereof, wherein the preparation method is to use a conductive slurry to screen print two separate circuit layers on two layers of thermoplastic film. Flexible fabric circuits should meet certain mechanical performance requirements, and most printing is carried out under low mechanical stress. The resistance of the printed flexible circuit will change during the stretching process. For complex circuits, changes in wire resistance will affect the normal operation of the entire connecting wire.

[0005] Inkjet printing is a rapid additive manufacturing method that sprays ink droplets onto a substrate to form a conductive pattern. This method has the characteristics of non-contact, high resolution, high precision, and digital rapid prototyping. For example, patent ZL202222414823.1 discloses a flexible, stretch-resistant printed circuit fabric, whose circuit is arranged in a wavy shape on the conductive layer and can stretch with the fabric. Through the printed circuit made of conductive silver paste and the sensor, it can collect human body signals when in contact with the human body. However, the dispersed silver particles during inkjet printing are easy to block the nozzle, and it is necessary to optimize the ink formulation and inkjet printing process to improve the ink printing ability, and the printed pattern must be sintered at high temperature to obtain conductivity, which will cause irreversible damage to the fabric substrate. Secondly, the thickness of the solidified conductive material deposited by inkjet printing is usually less than 1μm, and it is difficult to print a continuous conductive layer on a fabric with a rough surface. Similar prior art includes patent application CN202310283345.1, which uses this method to print printed circuits on fabrics. As the fabric bends and stretches, it often shows poor ductility and stability.

[0006] The conductive yarn introduction method is to use traditional weaving processes such as embroidery, weaving, and knitting to introduce conductive yarns into the fabric structure to form conductive connecting wires. This conductive fabric is light in weight and breathable. It has both the comfort of ordinary fabrics and excellent conductivity. The introduction of wires on the surface of the fabric by embroidery makes the fabric stiffer, reduces the overall extensibility of the fabric, and is not suitable for the circuit design of close-fitting fabrics. For example, patent application CN202010072986.9 uses a weaving method to weave conductive metal wires and surface-insulated conductive tapes into fabric circuits. Patent ZL201720616339.3 and patent application CN201810417358.2 use weaving and knitting methods to weave conductive wires and non-conductive wires into plain fabrics. Patent ZL202122012574.9 inserts conductive yarns into the base of a warp knitted fabric in the form of weft inserting to achieve regular or irregular zigzag, wavy, and trapezoidal distribution of conductive yarns. Patent application CN201010120005.X designs a double-layer conductive woven fabric, in which the first layer and the second layer are woven with conductive threads and non-conductive threads respectively, and the non-conductive threads weave the first layer and the second layer together. The conductive yarn-introduced conductive fabric mentioned above only introduces the conductive yarn into the fabric base, and does not introduce the electrode into the fabric to form a complete fabric circuit. Patent ZL202020922231.9 invented a fabric heating sheet, in which the single-layer fabric layer is divided into an electrode part and a heating part, but the electrode yarn partially introduced into the fabric still needs an external wire to be connected to the power supply, and a complete and integrated fabric circuit is not truly realized. Patent ZL202110495938.5 discloses a multi-layer woven composite heating fabric, the fabric circuit contained in which is interwoven by two groups of conductive warp and weft yarns, and the warp yarns in the two groups of conductive yarns are woven in staggered layers with insulating yarns to avoid contact with the conductive weft yarns of the other group. The two sets of conductive yarns in this textile circuit can directly connect electrodes without the need for additional external wires, but the multi-layer interweaving makes the fabric stiff and has poor ductility.

[0007] Therefore, studying a truly complete flexible fabric circuit is of great significance to enhancing its flexibility and comfort in various application scenarios. Summary of the invention

[0008] The purpose of the present invention is to solve the problems existing in the prior art and provide an integrally formed multi-layer flexible fabric circuit.

[0009] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0010] An integrally formed multi-layer flexible fabric circuit, classified by functional layout, includes main circuit I, branch circuit I, main circuit II, and branch circuit II. Main circuit I is connected to branch circuit I, main circuit II is connected to branch circuit II, main circuit I is not connected to main circuit II, and branch circuit I is not connected to branch circuit II;

[0011] Main circuit I and main circuit II enclose a "匚"-shaped area, and both branch circuit I and branch circuit II are located within this area;

[0012] The resistance ratio of main circuit I to branch circuit I is not less than 6, and the resistance ratio of main circuit II to branch circuit II is not less than 6. This can ensure that current can be transmitted to the entire main circuit and branch circuit, and prevent the current from forming a closed loop in some length segments of the main circuit and branch circuit, so that it cannot be transmitted to the entire main circuit and branch circuit;

[0013] Classified by composition structure, it includes an insulating warp knitted fabric and a single conductive yarn a, a single conductive yarn b, and multiple (i.e., two or more) conductive yarns X located inside it at the same time;

[0014] Conductive yarn a is a weft yarn inserted into the insulating warp knitted fabric from the left side, and conductive yarn b is a weft yarn inserted into the insulating warp knitted fabric from the right side;

[0015] Main circuit I is composed of a part of conductive yarn a and a part of conductive yarn X in contact with it, branch circuit I is composed of another part of conductive yarn a, main circuit II is composed of a part of conductive yarn b and another part of conductive yarn X in contact with it, and branch circuit II is composed of another part of conductive yarn b.

[0016] As a preferred technical solution:

[0017] For an integrally formed multi-layer flexible fabric circuit as described above, multiple conductive yarns X include multiple (i.e., two or more) conductive yarns c, multiple (i.e., two or more) conductive yarns d, and multiple (i.e., two or more) conductive yarns e;

[0018] Multiple conductive yarns c and multiple conductive yarns d respectively correspond to the front segment and the rear segment arranged along the warp direction formed after multiple conductive yarns Y are cut. One end of multiple conductive yarns c and multiple conductive yarns d exposes from the technological reverse side of the insulating warp knitted fabric;

[0019] Conductive yarn a is divided into left and right parts; conductive yarn b is divided into left and right parts, and the left part of conductive yarn b is divided into a left front part and a left rear part arranged along the warp direction; conductive yarn a is located in front of the left rear part of conductive yarn b;

[0020] The main circuit I is composed of the left part of the conductive yarn a and the conductive yarn c in contact with it, the branch circuit I is composed of the right part of the conductive yarn a, the main circuit II is composed of the left rear part of the conductive yarn b, the conductive yarn d in contact with the left rear part, the right part of the conductive yarn b, and the conductive yarn e in contact with the right part, and the branch circuit II is composed of the left front part of the conductive yarn b.

[0021] In the above-mentioned one-piece multi-layer flexible fabric circuit, a plurality of conductive yarns Y are woven between the loop stem and the extension line of the insulating warp knitted fabric in the form of warp lining, weft lining or looping; a plurality of conductive yarns e are woven between the loop stem and the extension line of the insulating warp knitted fabric in the form of warp lining, weft lining or looping; when the conductive yarn Y or the conductive yarn e is woven between the loop stem and the extension line of the insulating warp knitted fabric in the form of weft lining, the entire multi-layer flexible fabric circuit has excellent tensile properties due to the good stretchability of the conductive yarn Y or the conductive yarn e along the warp direction; when the conductive yarn Y or the conductive yarn e is woven between the loop stem and the extension line of the insulating warp knitted fabric in the form of looping, the resistance of the main circuit I and the main circuit II is small.

[0022] In the above-mentioned one-piece multi-layer flexible fabric circuit, all loop-forming modes are selected from chain weaving, plain warp, pile warp, and bias warp.

[0023] The one-piece multi-layer flexible fabric circuit as described above also includes electrodes located on the surface of the insulating warp knitted fabric according to the composition structure classification, and the ends of multiple conductive yarns c and multiple conductive yarns d exposed from the insulating warp knitted fabric are respectively connected to the positive and negative electrodes of the electrodes.

[0024] The one-piece multi-layer flexible fabric circuit as described above, according to the composition structure classification, also includes a conductive yarn f located inside the insulating warp knitted fabric, and the conductive yarn f is in contact with the branch circuit I and the branch circuit II at the same time.

[0025] In the above-mentioned one-piece multi-layer flexible fabric circuit, the conductive yarn f is woven into the loop trunk and the extension line of the insulating warp knitted fabric in the form of warp lining, weft lining or loop lining.

[0026] In the above-mentioned one-piece multi-layer flexible fabric circuit, the line resistance of the conductive yarn f is 100-5000Ω / cm, and the line resistance of the conductive yarn a and the conductive yarn b is 0.01-1Ω / cm, so that the current can act on the conductive yarn f as much as possible.

[0027] The present invention also provides an integrally formed multi-layer flexible fabric circuit, comprising an insulating weft-knitted double-sided fabric and a single conductive yarn g and a single conductive yarn h located inside the fabric at the same time;

[0028] The conductive yarn g does not contact the conductive yarn h;

[0029] The conductive yarn g is divided into two parts, the left part is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of yarn plaiting, the left part constitutes the main circuit III, and the right part constitutes the branch circuit III;

[0030] The conductive yarn h is divided into two parts, the right part is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of adding yarn loops, the right part constitutes the main circuit IV, and the left part constitutes the branch circuit IV;

[0031] The resistance ratio of the main circuit III to the branch circuit III is not less than 6, and the resistance ratio of the main circuit IV to the branch circuit IV is not less than 6. This ensures that the current can be transmitted to the entire main circuit and branch circuit, and avoids the current forming a closed loop in some length sections of the main circuit and branch circuit, and cannot be transmitted to the entire main circuit and branch circuit.

[0032] As the preferred technical solution:

[0033] In the above-mentioned one-piece multi-layer flexible fabric circuit, the right part of the conductive yarn g is a floating line; and the left part of the conductive yarn h is a floating line.

[0034] The one-piece multi-layer flexible fabric circuit as described above also includes electrodes located on the surface of the insulating weft-knitted double-sided fabric; one end of the conductive yarn g and the conductive yarn h are exposed from the same side of the insulating weft-knitted double-sided fabric and are respectively connected to the positive and negative electrodes of the electrodes.

[0035] The one-piece multi-layer flexible fabric circuit as described above further includes a conductive yarn i located inside the insulating weft-knitted double-sided fabric, and the conductive yarn i is in contact with the branch circuit III and the branch circuit IV at the same time.

[0036] In the above-mentioned one-piece multi-layer flexible fabric circuit, the conductive yarn i is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of yarn addition loops.

[0037] In the above-mentioned one-piece multi-layer flexible fabric circuit, the line resistance of the conductive yarn i is 100-5000Ω / cm, and the line resistance of the conductive yarn g and the conductive yarn h is 0.01-1Ω / cm, so that the current can act on the conductive yarn i as much as possible.

[0038] Beneficial effects:

[0039] The integrated multi-layer flexible fabric circuit of the present invention is integrally formed during weaving, does not need to be cut or only needs to be cut once, and maintains the integrity of the structure and the continuity of the yarn.

[0040] The integrally formed multi-layer flexible fabric circuit body of the present invention is an insulating warp knitted fabric or an insulating weft knitted double-sided fabric, which has good ductility, and the warp elongation rate and weft elongation rate can reach 30% and 15% respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 and Figure 2 is a schematic diagram of the integrally formed multi-layer flexible fabric circuit of Embodiment 1 of the present invention;

[0042] Figure 3 is an exploded schematic diagram of the integrally formed multi-layer flexible fabric circuit of Embodiment 1 of the present invention;

[0043] Figure 4 is an exploded schematic diagram of the integrally formed multi-layer flexible fabric circuit of Embodiment 2 of the present invention;

[0044] Figure 5 is an exploded schematic diagram of the integrally formed multi-layer flexible fabric circuit of Embodiment 3 of the present invention;

[0045] Among them, 1 is an integrally formed multi-layer flexible fabric circuit, 2-1 is the process front side of the insulating warp knitted fabric, 2-2 is the process back side of the insulating warp knitted fabric, 3 is the conductive yarn X, 4 is the conductive yarn f, 5 is the conductive yarn b, 6 is the main circuit I, 7 is the branch circuit I, 8 is the main circuit II, and 9 is the branch circuit II. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0047] Embodiment 1

[0048] An integrally formed multi-layer flexible fabric circuit, as Figure 2 shown, classified by functional layout includes a main circuit I 6, a branch circuit I 7, a main circuit II 8, and a branch circuit II 9. The main circuit I 6 is connected to the branch circuit I 7, the main circuit II 8 is connected to the branch circuit II 9, the main circuit I 6 is not connected to the main circuit II 8, and the branch circuit I 7 is not connected to the branch circuit II 9;

[0049] The main circuit I 6 and the main circuit II 8 enclose a "匚"-shaped area, and both the branch circuit I 7 and the branch circuit II 9 are located within this area;

[0050] The resistance ratio of the main circuit I 6 to the branch circuit I 7 is 6, and the resistance ratio of the main circuit II 8 to the branch circuit II 9 is 6;

[0051] like Figure 1 As shown, the integrally formed multi-layer flexible fabric circuit 1 is classified according to the composition structure and consists of an insulating warp knitted fabric (composed of insulating yarn, the insulating yarn is polyacrylonitrile pre-oxidized yarn, the specification is 40s, and is divided into a process front side 2-1 of the insulating warp knitted fabric and a process back side 2-2 of the insulating warp knitted fabric), an electrode located on the surface of the insulating warp knitted fabric, and a single conductive yarn a (the line resistance of the conductive yarn a is 0.04Ω / cm, and the conductive yarn a is twisted by 9 copper wires with a diameter of 0.03mm), a single conductive yarn b 5 (the line resistance of the conductive yarn b is 0.04Ω / cm, and the conductive yarn b is twisted by 9 copper wires with a diameter of 0.03mm), a conductive yarn X 3, and a conductive yarn f 4 (the conductive yarn f is polyester fiber coated with carbon nanotube conductive paste, the specification is 70D, and the line resistance is 2000Ω / cm) located inside the insulating warp knitted fabric;

[0052] The conductive yarn a is a weft yarn inserted into the insulating warp knitted fabric from the left side, and consists of two parts, left and right;

[0053] The conductive yarn b5 is a weft yarn inserted into the insulating warp knitted fabric from the right side, and is composed of two parts, the left part is divided into a left front part and a left rear part arranged along the warp direction;

[0054] The conductive yarn a is located at the front side of the left rear portion of the conductive yarn b 5;

[0055] The conductive yarn X 3 is composed of a plurality of conductive yarns c, a plurality of conductive yarns d, and a plurality of (30) conductive yarns e (the line resistance of the conductive yarn e is 0.04 Ω / cm, and the conductive yarn e is formed by twisting 9 copper wires with a diameter of 0.03 mm);

[0056] The plurality of conductive yarns c and the plurality of conductive yarns d correspond to the front section and the rear section arranged along the warp direction formed after the plurality of (30) conductive yarns Y (the line resistance of the conductive yarn Y is 0.04Ω / cm, and the conductive yarn Y is formed by twisting 9 copper wires with a diameter of 0.03mm) are cut, respectively. One end of the plurality of conductive yarns c and the plurality of conductive yarns d are exposed from the technical reverse side 2-2 of the insulating warp knitted fabric and are respectively connected to the positive electrode and the negative electrode of the electrode;

[0057] The main circuit I 6 is composed of the left part of the conductive yarn a and the conductive yarn c in contact therewith, the branch circuit I 7 is composed of the right part of the conductive yarn a, the main circuit II 8 is composed of the left rear part of the conductive yarn b 5, the conductive yarn d in contact with the left rear part, the right part of the conductive yarn b 5, and the conductive yarn e in contact with the right part, and the branch circuit II 9 is composed of the left front part of the conductive yarn b 5;

[0058] The conductive yarn f4 is in contact with the branch circuit I7 and the branch circuit II9 simultaneously;

[0059] As Figure 3 shown, multiple conductive yarns Y are woven between the loop stems and the延展线 (it seems there is a typo here, assuming it should be "延展线" which might be "延展线" in Chinese) of the insulating warp knitted fabric in the manner of warp insertion; multiple conductive yarns e are woven between the loop stems and the延展线 of the insulating warp knitted fabric in the manner of warp insertion; the conductive yarn f4 is woven between the loop stems and the延展线 of the insulating warp knitted fabric in the manner of weft insertion.

[0060] The preparation method of the integrally formed multi - layer flexible fabric circuit as described above is as follows: A single - needle - bed warp knitting machine with two large - traverse pattern combs and three ground combs is used for knitting. The arrangement order of the combs from the front of the machine to the back is: GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), PB1 (large - traverse pattern comb), PB2 (large - traverse pattern comb). During the knitting process, GB1 forms a plain stitch, GB2 does warp insertion, GB3 does 1 - needle weft insertion, and PB1 and PB2 do weft - insertion movement according to the Figure 3 trajectory shown, and then the knitted fabric is taken off the machine. Cut the conductive yarn Y as shown in Figure 3 shown, connect the electrodes, and then the integrally formed multi - layer flexible fabric circuit 1 is obtained. Among them, GB1 is fully threaded with insulating yarn, both the left and right sides of GB2 are fully threaded with 30 conductive yarns X, GB3 is fully threaded with conductive yarn f, PB1 is threaded with 1 conductive yarn a, and PB2 is threaded with 1 conductive yarn b.

[0061] Example 2

[0062] An integrally formed multi - layer flexible fabric circuit, classified by functional layout, includes a main circuit I, a branch circuit I, a main circuit II, and a branch circuit II. The main circuit I is connected to the branch circuit I, the main circuit II is connected to the branch circuit II, the main circuit I is not connected to the main circuit II, and the branch circuit I is not connected to the branch circuit II;

[0063] The main circuit I and the main circuit II enclose a "匚" - shaped area, and both the branch circuit I and the branch circuit II are located within this area;

[0064] The resistance ratio of the main circuit I to the branch circuit I is 10, and the resistance ratio of the main circuit II to the branch circuit II is 10;

[0065] According to the composition structure, it is composed of an insulating warp knitted fabric (composed of insulating yarn, which is flame-retardant nylon filament with a specification of 100D / 48F), an electrode located on the surface of the insulating warp knitted fabric, and a single conductive yarn a located inside the insulating warp knitted fabric (the line resistance of the conductive yarn a is 0.025Ω / cm, and the conductive yarn a is twisted by 12 copper wires with a diameter of 0.03mm), a single conductive yarn b (the line resistance of the conductive yarn b is 0.025Ω / cm, and the conductive yarn b is twisted by 12 copper wires with a diameter of 0.03mm), a conductive yarn X, and a conductive yarn f (the conductive yarn f is a pre-oxidized yarn carbonized at low temperature, and the line resistance is 3000Ω / cm);

[0066] The conductive yarn a is a weft yarn inserted into the insulating warp knitted fabric from the left side, and consists of two parts, left and right;

[0067] The conductive yarn b is a weft yarn inserted into the insulating warp knitted fabric from the right side, and is composed of two parts, the left part is divided into a left front part and a left rear part arranged along the warp direction;

[0068] The conductive yarn a is located at the front side of the left rear portion of the conductive yarn b;

[0069] The conductive yarn X is composed of a plurality of conductive yarns c, a plurality of conductive yarns d, and a plurality of (30) conductive yarns e (the conductive yarn e is a copper wire with a diameter of 0.03 mm, formed by twisting 12 yarns, and a line resistance of 0.025 Ω / cm);

[0070] The plurality of conductive yarns c and the plurality of conductive yarns d correspond to the front section and the rear section arranged along the warp direction formed by cutting a plurality of (30) conductive yarns Y (the conductive yarn Y is a copper wire with a diameter of 0.03 mm, formed by twisting 12 strands, and having a line resistance of 0.025 Ω / cm), respectively. One end of the plurality of conductive yarns c and the plurality of conductive yarns d are exposed from the technical reverse side of the insulating warp knitted fabric and are respectively connected to the positive electrode and the negative electrode of the electrode;

[0071] The main circuit I is composed of the left part of the conductive yarn a and the conductive yarn c in contact with it, the branch circuit I is composed of the right part of the conductive yarn a, the main circuit II is composed of the left rear part of the conductive yarn b, the conductive yarn d in contact with the left rear part, the right part of the conductive yarn b, and the conductive yarn e in contact with the right part, and the branch circuit II is composed of the left front part of the conductive yarn b;

[0072] The conductive yarn f is in contact with the branch circuit I and the branch circuit II at the same time;

[0073] Multiple conductive yarns Y are woven between the loop stems and extension lines of the insulating warp knitted fabric in a weft-inserted manner; multiple conductive yarns e are woven between the loop stems and extension lines of the insulating warp knitted fabric in a weft-inserted manner; and conductive yarn f is woven between the loop stems and extension lines of the insulating warp knitted fabric in a warp-inserted manner.

[0074] The preparation method of the integrally formed multi-layer flexible fabric circuit as described above is as follows: A single needle bed warp knitting machine with two large cross-lapping combs and three ground combs is used for knitting. The arrangement order of the combs from the front of the machine to the back is: GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), PB1 (large cross-lapping comb), PB2 (large cross-lapping comb). During the knitting process, GB1 forms a plain stitch, GB2 acts as a laid-in warp, GB3 acts as a 1-needle laid-in weft, and PB1 and PB2 perform a laid-in weft movement according to the Figure 3 trajectory shown, and then the knitted fabric is taken off the machine. Cut the conductive yarn Y according to the Figure 3 trajectory shown, and connect the electrodes to obtain the integrally formed multi-layer flexible fabric circuit. Among them, GB1 is fully threaded with insulating yarn, GB2 is fully threaded with 30 conductive yarns X on both the left and right sides, GB3 is fully threaded with conductive yarn f, PB1 is threaded with 1 conductive yarn a, and PB2 is threaded with 1 conductive yarn b.

[0075] Example 3

[0076] An integrally formed multi-layer flexible fabric circuit, classified by functional layout, includes main circuit I, branch circuit I, main circuit II, and branch circuit II. Main circuit I is connected to branch circuit I, main circuit II is connected to branch circuit II, main circuit I is not connected to main circuit II, and branch circuit I is not connected to branch circuit II;

[0077] Main circuit I and main circuit II enclose a "匚"-shaped area, and both branch circuit I and branch circuit II are located within this area;

[0078] The resistance ratio of main circuit I to branch circuit I is 20, and the resistance ratio of main circuit II to branch circuit II is 20;

[0079] Classified by composition structure, it consists of an insulating warp knitted fabric (made of insulating yarn, the insulating yarn is wool yarn, with a specification of 60 Nm), electrodes located on the surface of the insulating warp knitted fabric, and single conductive yarn a (the wire resistance of conductive yarn a is 0.015 Ω / cm, and conductive yarn a is twisted from 7 copper wires with a diameter of 0.05 mm), single conductive yarn b (the wire resistance of conductive yarn b is 0.015 Ω / cm, and conductive yarn b is twisted from 12 copper wires with a diameter of 0.05 mm), conductive yarn X, and conductive yarn f (conductive yarn f is low-temperature carbonized pre-oxidized yarn, with a wire resistance of 5000 Ω / cm) located inside the insulating warp knitted fabric at the same time;

[0080] Conductive yarn a is a weft yarn inserted into the insulating warp knitted fabric from the left, and consists of left and right parts;

[0081] Conductive yarn b is a weft yarn inserted into the insulating warp knitted fabric from the right, and consists of left and right parts. The left part is divided into a left front part and a left rear part arranged along the warp direction;

[0082] The conductive yarn a is located at the front side of the left rear portion of the conductive yarn b;

[0083] The conductive yarn X is composed of a plurality of conductive yarns c, a plurality of conductive yarns d, and a plurality of (30) conductive yarns e (the conductive yarn e is a copper wire with a diameter of 0.05 mm, which is twisted by 7 strands and has a line resistance of 0.015 Ω / cm);

[0084] The plurality of conductive yarns c and the plurality of conductive yarns d correspond to the front section and the rear section arranged along the warp direction formed by cutting a plurality of (30) conductive yarns Y (the conductive yarn Y is a copper wire with a diameter of 0.05 mm, formed by twisting 7 strands, and having a line resistance of 0.015 Ω / cm), respectively. One end of the plurality of conductive yarns c and the plurality of conductive yarns d are exposed from the technical reverse side of the insulating warp knitted fabric and are respectively connected to the positive electrode and the negative electrode of the electrode;

[0085] The main circuit I is composed of the left part of the conductive yarn a and the conductive yarn c in contact with it, the branch circuit I is composed of the right part of the conductive yarn a, the main circuit II is composed of the left rear part of the conductive yarn b, the conductive yarn d in contact with the left rear part, the right part of the conductive yarn b, and the conductive yarn e in contact with the right part, and the branch circuit II is composed of the left front part of the conductive yarn b;

[0086] The conductive yarn f is in contact with the branch circuit I and the branch circuit II at the same time;

[0087] A plurality of conductive yarns Y are woven into the loop stem and the extension line of the insulating warp knitted fabric in a loop-forming manner (the loop-forming manner is chain-weaving); a plurality of conductive yarns e are woven into the loop stem and the extension line of the insulating warp knitted fabric in a loop-forming manner (the loop-forming manner is chain-weaving); and a conductive yarn f is woven into the loop stem and the extension line of the insulating warp knitted fabric in a loop-forming manner (the loop-forming manner is warp flat).

[0088] The method for preparing the integrated multi-layer flexible fabric circuit as described above is specifically as follows: a single needle bed warp knitting machine with two large transverse pattern combs and three ground combs is used for weaving, and the arrangement order of the combs from the front to the back of the machine is: GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), PB1 (large transverse pattern comb), PB2 (large transverse pattern comb), during the weaving process, GB1 forms a warp flat, GB2 is used as a lining warp, GB3 is used as a 1-needle weft lining, and PB1 and PB2 are arranged in a straight line. Figure 3 The weft insertion movement is performed along the trajectory shown in the figure, and then the woven fabric is unloaded from the machine. Figure 3 As shown, the conductive yarn Y is cut and the electrodes are connected to obtain an integrated multi-layer flexible fabric circuit; wherein GB1 is fully penetrated with insulating yarn, GB2 is fully penetrated with 30 conductive yarns X on both sides, GB3 is fully penetrated with conductive yarn f, PB1 is penetrated with 1 conductive yarn a, and PB2 is penetrated with 1 conductive yarn b.

[0089] Example 4

[0090] An integrally formed multi-layer flexible fabric circuit, classified by functional layout, includes main circuit I, branch circuit I, main circuit II, and branch circuit II. Main circuit I is connected to branch circuit I, main circuit II is connected to branch circuit II, main circuit I is not connected to main circuit II, and branch circuit I is not connected to branch circuit II;

[0091] Main circuit I and main circuit II enclose a "匚"-shaped area, and both branch circuit I and branch circuit II are located within this area;

[0092] The resistance ratio of main circuit I to branch circuit I is 15, and the resistance ratio of main circuit II to branch circuit II is 15;

[0093] Classified by composition structure, it consists of an insulating warp knitted fabric (made of insulating yarns, the insulating yarns are flame-retardant polyester with a specification of 100D / 48F), electrodes located on the surface of the insulating warp knitted fabric, and single conductive yarn a (the linear resistance of conductive yarn a is 0.04Ω / cm, and conductive yarn a is twisted from 9 copper wires with a diameter of 0.03mm), single conductive yarn b (the linear resistance of conductive yarn b is 0.04Ω / cm, and conductive yarn b is twisted from 9 copper wires with a diameter of 0.03mm), conductive yarn X, and conductive yarn f (conductive yarn f is pre-oxidized yarn low-temperature carbonized, with a linear resistance of 5000Ω / cm);

[0094] Conductive yarn a is a weft yarn inserted into the insulating warp knitted fabric from the left side and consists of left and right parts;

[0095] Conductive yarn b is a weft yarn inserted into the insulating warp knitted fabric from the right side and consists of left and right parts. The left part is divided into a left front part and a left rear part arranged along the warp direction;

[0096] Conductive yarn a is located in front of the left rear part of conductive yarn b;

[0097] Conductive yarn X is composed of multiple conductive yarns c, multiple conductive yarns d, and multiple (30) conductive yarns e (conductive yarn e is a copper wire with a diameter of 0.03mm, twisted from 9 wires, and the linear resistance is 0.04Ω / cm);

[0098] Multiple conductive yarns c and multiple conductive yarns d respectively correspond to the front and rear segments arranged along the warp direction formed after multiple (30) conductive yarns Y (conductive yarn Y is a copper wire with a diameter of 0.03mm, twisted from 9 wires, and the linear resistance is 0.04Ω / cm) are cut. One end of multiple conductive yarns c and multiple conductive yarns d exposes from the process reverse side of the insulating warp knitted fabric and is respectively connected to the positive and negative electrodes;

[0099] The main circuit I is composed of the left part of the conductive yarn a and the conductive yarn c in contact with it, the branch circuit I is composed of the right part of the conductive yarn a, the main circuit II is composed of the left rear part of the conductive yarn b, the conductive yarn d in contact with the left rear part, the right part of the conductive yarn b, and the conductive yarn e in contact with the right part, and the branch circuit II is composed of the left front part of the conductive yarn b;

[0100] The conductive yarn f is in contact with the branch circuit I and the branch circuit II at the same time;

[0101] A plurality of conductive yarns Y are woven into the loop stem and the extension line of the insulating warp knitted fabric in a loop-forming manner (the loop-forming manner is warp flat); a plurality of conductive yarns e are woven into the loop stem and the extension line of the insulating warp knitted fabric in a loop-forming manner (the loop-forming manner is warp flat); and a conductive yarn f is woven into the loop stem and the extension line of the insulating warp knitted fabric in a loop-forming manner (the loop-forming manner is chain braiding).

[0102] The method for preparing the integrated multi-layer flexible fabric circuit as described above is specifically as follows: a single needle bed warp knitting machine with two large transverse pattern combs and three ground combs is used for weaving, and the arrangement order of the combs from the front to the back of the machine is: GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), PB1 (large transverse pattern comb), PB2 (large transverse pattern comb), during the weaving process, GB1 forms a warp flat, GB2 is used as a lining warp, GB3 is used as a 1-needle weft lining, and PB1 and PB2 are arranged in a straight line. Figure 3 The weft insertion movement is performed along the trajectory shown in the figure, and then the woven fabric is unloaded from the machine. Figure 3 As shown, the conductive yarn Y is cut and the electrodes are connected to obtain an integrated multi-layer flexible fabric circuit; wherein GB1 is fully penetrated with insulating yarn, GB2 is fully penetrated with 30 conductive yarns X on both sides, GB3 is fully penetrated with conductive yarn f, PB1 is penetrated with 1 conductive yarn a, and PB2 is penetrated with 1 conductive yarn b.

[0103] Example 5

[0104] An integrally formed multi-layer flexible fabric circuit, comprising an insulating weft-knitted double-sided fabric (composed of insulating yarn, which is polyacrylonitrile pre-oxidized yarn with a specification of 40s), an electrode located on the surface of the insulating weft-knitted double-sided fabric, and a single conductive yarn g (the conductive yarn g has a line resistance of 0.04Ω / cm, and the conductive yarn g is formed by twisting 9 copper wires with a diameter of 0.03mm), a single conductive yarn h (the conductive yarn h has a line resistance of 0.04Ω / cm, and the conductive yarn h is formed by twisting 9 copper wires with a diameter of 0.03mm), and a conductive yarn i (the conductive yarn i is polyester fiber coated with carbon nanotube conductive paste with a specification of 70D and a line resistance of 2000Ω / cm) located inside the insulating weft-knitted double-sided fabric;

[0105] The conductive yarn g does not contact the conductive yarn h;

[0106] One end of the conductive yarn g and the conductive yarn h are exposed from the same side of the insulating weft-knitted double-sided fabric and are connected to the positive electrode and the negative electrode of the electrode respectively;

[0107] The conductive yarn g is divided into two parts, the left part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, and the right part is a floating line. The left part constitutes the main circuit III, and the right part constitutes the branch circuit III.

[0108] The conductive yarn h is divided into two parts, the right part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, the left part is a floating line, the right part constitutes the main circuit IV, and the left part constitutes the branch circuit IV;

[0109] The resistance ratio of the trunk circuit III to the branch circuit III is 6, and the resistance ratio of the trunk circuit IV to the branch circuit IV is 6;

[0110] The conductive yarn i is in contact with the branch circuit III and the branch circuit IV at the same time;

[0111] The conductive yarn i is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of yarn plaiting.

[0112] A method for preparing the integrally formed multi-layer flexible fabric circuit as described above is specifically as follows: on a computer flat knitting machine with a machine number of 18 needles, four yarn mouths are used for weaving to weave the electrically heated fabric, the yarn mouths from left to right are YG1, YG2, YG3 and YG4, YG1 and YG2 weave ribbed yarn on the left side of the fabric, YG1 and YG3 weave ribbed yarn in the middle of the fabric, YG1 and YG4 weave ribbed yarn on the right side of the fabric, YG2 and YG4 are respectively brought into the yarn i area through floating lines to connect the electrodes; wherein, YG1 wears insulating yarn, YG2 wears conductive yarn g, YG3 wears conductive yarn i, and YG4 wears conductive yarn h.

[0113] Example 6

[0114] An integrally formed multi-layer flexible fabric circuit, comprising an insulating weft-knitted double-sided fabric (composed of insulating yarn, which is flame-retardant nylon filament with a specification of 100D / 48F), an electrode located on the surface of the insulating weft-knitted double-sided fabric, and a single conductive yarn g (the conductive yarn g has a line resistance of 0.025Ω / cm, and the conductive yarn g is formed by twisting 12 copper wires with a diameter of 0.03mm), a single conductive yarn h (the conductive yarn h has a line resistance of 0.025Ω / cm, and the conductive yarn g is formed by twisting 12 copper wires with a diameter of 0.03mm), and a conductive yarn i (the conductive yarn i is a pre-oxidized yarn carbonized at low temperature, and has a line resistance of 3000Ω / cm) located inside the insulating weft-knitted double-sided fabric;

[0115] The conductive yarn g does not contact the conductive yarn h;

[0116] One end of the conductive yarn g and the conductive yarn h are exposed from the same side of the insulating weft-knitted double-sided fabric and are connected to the positive electrode and the negative electrode of the electrode respectively;

[0117] The conductive yarn g is divided into two parts, the left part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, and the right part is a floating line. The left part constitutes the main circuit III, and the right part constitutes the branch circuit III.

[0118] The conductive yarn h is divided into two parts, the right part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, the left part is a floating line, the right part constitutes the main circuit IV, and the left part constitutes the branch circuit IV;

[0119] The resistance ratio of the trunk circuit III to the branch circuit III is 8, and the resistance ratio of the trunk circuit IV to the branch circuit IV is 8;

[0120] The conductive yarn i is in contact with the branch circuit III and the branch circuit IV at the same time;

[0121] The conductive yarn i is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of yarn plaiting.

[0122] A method for preparing the integrally formed multi-layer flexible fabric circuit as described above is specifically as follows: on a computer flat knitting machine with a machine number of 18 needles, four yarn mouths are used for weaving to weave the electrically heated fabric, the yarn mouths from left to right are YG1, YG2, YG3 and YG4, YG1 and YG2 weave ribbed yarn on the left side of the fabric, YG1 and YG3 weave ribbed yarn in the middle of the fabric, YG1 and YG4 weave ribbed yarn on the right side of the fabric, YG2 and YG4 are respectively brought into the yarn i area through floating lines to connect the electrodes; wherein, YG1 wears insulating yarn, YG2 wears conductive yarn g, YG3 wears conductive yarn i, and YG4 wears conductive yarn h.

[0123] Example 7

[0124] An integrally formed multi-layer flexible fabric circuit, comprising an insulating weft-knitted double-sided fabric (composed of insulating yarn, which is wool yarn with a specification of 60Nm), an electrode located on the surface of the insulating weft-knitted double-sided fabric, and a single conductive yarn g (the conductive yarn g has a line resistance of 0.015Ω / cm, and the conductive yarn g is twisted by 7 copper wires with a diameter of 0.05mm), a single conductive yarn h (the conductive yarn h has a line resistance of 0.015Ω / cm, and the conductive yarn h is twisted by 7 copper wires with a diameter of 0.05mm), and a conductive yarn i (the conductive yarn i is a pre-oxidized yarn carbonized at low temperature, and has a line resistance of 5000Ω / cm) located inside the insulating weft-knitted double-sided fabric;

[0125] The conductive yarn g does not contact the conductive yarn h;

[0126] One end of the conductive yarn g and the conductive yarn h are exposed from the same side of the insulating weft-knitted double-sided fabric and are connected to the positive electrode and the negative electrode of the electrode respectively;

[0127] The conductive yarn g is divided into two parts, the left part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, and the right part is a floating line. The left part constitutes the main circuit III, and the right part constitutes the branch circuit III.

[0128] The conductive yarn h is divided into two parts, the right part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, the left part is a floating line, the right part constitutes the main circuit IV, and the left part constitutes the branch circuit IV;

[0129] The resistance ratio of the trunk circuit III to the branch circuit III is 10, and the resistance ratio of the trunk circuit IV to the branch circuit IV is 10;

[0130] The conductive yarn i is in contact with the branch circuit III and the branch circuit IV at the same time;

[0131] The conductive yarn i is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of yarn plaiting.

[0132] A method for preparing the integrally formed multi-layer flexible fabric circuit as described above is specifically as follows: on a computer flat knitting machine with a machine number of 18 needles, four yarn mouths are used for weaving to weave the electrically heated fabric, the yarn mouths from left to right are YG1, YG2, YG3 and YG4, YG1 and YG2 weave ribbed yarn on the left side of the fabric, YG1 and YG3 weave ribbed yarn in the middle of the fabric, YG1 and YG4 weave ribbed yarn on the right side of the fabric, YG2 and YG4 are respectively brought into the yarn i area through floating lines to connect the electrodes; wherein, YG1 wears insulating yarn, YG2 wears conductive yarn g, YG3 wears conductive yarn i, and YG4 wears conductive yarn h.

[0133] Example 8

[0134] An integrally formed multi-layer flexible fabric circuit, comprising an insulating weft-knitted double-sided fabric (composed of insulating yarn, which is flame-retardant polyester with a specification of 100D / 48F), an electrode located on the surface of the insulating weft-knitted double-sided fabric, and a single conductive yarn g located inside the insulating weft-knitted double-sided fabric (the conductive yarn g has a line resistance of 0.04Ω / cm, and is formed by twisting 7 copper wires with a diameter of 0.03mm), a single conductive yarn h (the conductive yarn h is a copper wire with a diameter of 0.03mm, which is twisted by 9 wires, and has a line resistance of 0.04Ω / cm), and a conductive yarn i (the conductive yarn i is a pre-oxidized yarn carbonized at low temperature, and has a line resistance of 5000Ω / cm);

[0135] The conductive yarn g does not contact the conductive yarn h;

[0136] One end of the conductive yarn g and the conductive yarn h are exposed from the same side of the insulating weft-knitted double-sided fabric and are connected to the positive electrode and the negative electrode of the electrode respectively;

[0137] The conductive yarn g is divided into two parts, the left part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, and the right part is a floating line. The left part constitutes the main circuit III, and the right part constitutes the branch circuit III.

[0138] The conductive yarn h is divided into two parts, the right part is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a looping manner, the left part is a floating line, the right part constitutes the main circuit IV, and the left part constitutes the branch circuit IV;

[0139] The resistance ratio of the trunk circuit III to the branch circuit III is 10, and the resistance ratio of the trunk circuit IV to the branch circuit IV is 10;

[0140] The conductive yarn i is in contact with the branch circuit III and the branch circuit IV at the same time;

[0141] The conductive yarn i is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of yarn plaiting.

[0142] A method for preparing the integrally formed multi-layer flexible fabric circuit as described above is specifically as follows: on a computer flat knitting machine with a machine number of 18 needles, four yarn mouths are used for weaving to weave the electrically heated fabric, the yarn mouths from left to right are YG1, YG2, YG3 and YG4, YG1 and YG2 weave ribbed yarn on the left side of the fabric, YG1 and YG3 weave ribbed yarn in the middle of the fabric, YG1 and YG4 weave ribbed yarn on the right side of the fabric, YG2 and YG4 are respectively brought into the yarn i area through floating lines to connect the electrodes; wherein, YG1 wears insulating yarn, YG2 wears conductive yarn g, YG3 wears conductive yarn i, and YG4 wears conductive yarn h.

Claims

1. An integrally formed multi-layer flexible fabric circuit, characterized in that: The classification by functional layout includes main circuit I, branch circuit I, main circuit II, and branch circuit II. Main circuit I is connected to branch circuit I, and main circuit II is connected to branch circuit II. Main circuit I is not connected to main circuit II, and branch circuit I is not connected to branch circuit II; Main circuit I and main circuit II enclose a "匚"-shaped area, and both branch circuit I and branch circuit II are located within this area; The resistance ratio of main circuit I to branch circuit I is not less than 6, and the resistance ratio of main circuit II to branch circuit II is not less than 6; The classification by composition structure includes an insulating warp knitted fabric and a single conductive yarn a, a single conductive yarn b, and multiple conductive yarns X located inside it at the same time; Conductive yarn a is a weft yarn inserted into the insulating warp knitted fabric from the left side, and conductive yarn b is a weft yarn inserted into the insulating warp knitted fabric from the right side; Main circuit I is composed of a part of conductive yarn a and a part of conductive yarn X in contact with it, branch circuit I is composed of another part of conductive yarn a, main circuit II is composed of a part of conductive yarn b and another part of conductive yarn X in contact with it, and branch circuit II is composed of another part of conductive yarn b.

2. The one-piece multi-layer flexible fabric circuit according to claim 1, characterized in that: Multiple conductive yarns X include multiple conductive yarns c, multiple conductive yarns d, and multiple conductive yarns e; Multiple conductive yarns c and multiple conductive yarns d respectively correspond to the front section and the rear section arranged along the warp direction formed after multiple conductive yarns Y are cut. One ends of multiple conductive yarns c and multiple conductive yarns d both protrude from the technological reverse side of the insulating warp knitted fabric; Conductive yarn a is divided into left and right parts; conductive yarn b is divided into left and right parts, and the left part of conductive yarn b is divided into a left front part and a left rear part arranged along the warp direction; conductive yarn a is located in front of the left rear part of conductive yarn b; Main circuit I is composed of the left part of conductive yarn a and conductive yarn c in contact with it, branch circuit I is composed of the right part of conductive yarn a, main circuit II is composed of the left rear part of conductive yarn b, conductive yarn d in contact with the left rear part, the right part of conductive yarn b, and conductive yarn e in contact with the right part, and branch circuit II is composed of the left front part of conductive yarn b.

3. The one-piece multi-layer flexible fabric circuit according to claim 2, characterized in that: Multiple conductive yarns Y are woven into the loop and extension line of the insulating warp knitted fabric in the form of warp insertion, weft insertion, or looping; multiple conductive yarns e are woven into the loop and extension line of the insulating warp knitted fabric in the form of warp insertion, weft insertion, or looping.

4. The one-piece multi-layer flexible fabric circuit according to claim 3, characterized in that: All looping methods are selected from one of chain stitch, plain stitch, plush stitch, and twill stitch.

5. The one-piece multi-layer flexible fabric circuit according to claim 2, characterized in that: The classification by composition structure also includes electrodes located on the surface of the insulating warp knitted fabric. One ends of multiple conductive yarns c and multiple conductive yarns d protruding from the insulating warp knitted fabric are respectively connected to the positive and negative electrodes.

6. The one-piece multi-layer flexible fabric circuit according to claim 1, characterized in that: The classification by composition structure also includes a conductive yarn f located inside the insulating warp knitted fabric. Conductive yarn f is in contact with both branch circuit I and branch circuit II at the same time; conductive yarn f is woven into the loop and extension line of the insulating warp knitted fabric in the form of warp insertion, weft insertion, or looping; the linear resistance of conductive yarn f is 100 - 5000 Ω / cm, and the linear resistances of conductive yarn a and conductive yarn b are 0.01 - 1 Ω / cm.

7. An integrally formed multi-layer flexible fabric circuit, characterized in that: It includes an insulating weft knitted double-sided fabric and a single conductive yarn g and a single conductive yarn h located inside it at the same time; The conductive yarn g does not contact the conductive yarn h; The conductive yarn g is divided into two parts, the left part is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of yarn plaiting, the left part constitutes the main circuit III, and the right part constitutes the branch circuit III; The conductive yarn h is divided into two parts, the right part is woven into the insulating weft-knitted double-sided fabric between the front coil and the back coil in the form of adding yarn loops, the right part constitutes the main circuit IV, and the left part constitutes the branch circuit IV; The resistance ratio of the main circuit III to the branch circuit III is not less than 6, and the resistance ratio of the main circuit IV to the branch circuit IV is not less than 6.

8. The one-piece multi-layer flexible fabric circuit according to claim 7, characterized in that: The right part of the conductive yarn g is a floating line; the left part of the conductive yarn h is a floating line.

9. The one-piece multi-layer flexible fabric circuit according to claim 7, characterized in that: It also includes an electrode located on the surface of the insulating weft-knitted double-sided fabric; one end of the conductive yarn g and the conductive yarn h are exposed from the same side of the insulating weft-knitted double-sided fabric and are respectively connected to the positive electrode and the negative electrode of the electrode.

10. The integrally formed multi-layer flexible fabric circuit according to claim 7, characterized in that: It also includes a conductive yarn i located inside the insulating weft-knitted double-sided fabric, and the conductive yarn i is in contact with the branch circuit III and the branch circuit IV at the same time; the conductive yarn i is woven between the front coil and the back coil of the insulating weft-knitted double-sided fabric in a loop-forming manner; the line resistance of the conductive yarn i is 100-5000Ω / cm, and the line resistance of the conductive yarn g and the conductive yarn h is 0.01-1Ω / cm.

Images