Flexible pressure sensor and manufacturing method thereof

Abstract

The invention discloses a flexible pressure sensor and a manufacturing method thereof. The manufacturing method of the flexible pressure sensor comprises the steps that a base body, a plurality of conductive wires and a plurality of metal terminals are provided, and the base body is made of cloth; a plurality of conductive wires are arranged in the base body in a penetrating mode in a knitting, embroidering or plain weaving mode, and the plurality of conductive wires are arranged on the base body at intervals; corresponding to the conductive wires, the first ends of the metal terminals penetrate through the base body, the metal terminals are arranged to be electrically connected with the conductive wires, and each metal terminal is connected with one conductive wire; and pressing and fixing the first end of the metal terminal on the substrate to obtain the flexible pressure sensor. The method has the advantages of simple process, reliable yield, high efficiency, easy mass production and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a flexible pressure sensor and a manufacturing method thereof. BACKGROUND

[0002] With the continuous progress of sensor technology, flexible pressure sensors are increasingly widely used in electronic devices. Flexible pressure sensors are widely used in high-end chairs, smart wear, medical devices and other fields due to their unique flexibility and high sensitivity, especially in smart chairs such as massage chairs, car seats, aviation seats, aerospace seats, and vehicle accessories such as vehicle refrigerators, vehicle temperature boxes, glove boxes, and interior accessories. They are often used to detect pressure changes and assist in realizing interactive functions. However, the existing manufacturing process of flexible pressure sensors is not mature, and there are problems such as complex process, low efficiency, limited yield, expensive materials, and further problems such as poor bending resistance of multiple positions of the sensor, complex structure and process, and unreliable electrical connection. SUMMARY

[0003] The flexible pressure sensor and the manufacturing method thereof disclosed in the present application solve the problems of complex process, low efficiency, and limited yield in the related art, and the manufactured flexible pressure sensor has advantages such as bending and pulling resistance, stable signal connection, simple and reliable structure and process, and low process material cost.

[0004] In a first aspect, the present application provides a manufacturing method of a flexible pressure sensor, comprising: providing a base body, a plurality of conductive wires, and a plurality of metal terminals, wherein the material of the base body includes cloth; inserting the plurality of conductive wires into the base body by knitting, embroidering, or plain weaving, and arranging the plurality of conductive wires on the base body at intervals; corresponding to the conductive wires, piercing the first end of the metal terminal into the base body and arranging the metal terminal in electrical connection with the conductive wire, wherein each metal terminal is connected to one conductive wire; pressing and fixing the first end of the metal terminal to the base body to obtain a flexible pressure sensor.

[0005] In a second aspect, the present application provides a flexible pressure sensor, and the manufacturing process includes the manufacturing method of the flexible pressure sensor in any embodiment of the present application.

[0006] The manufacturing method of the flexible pressure sensor provided in the application reliably inserts the conductive wire into the base body through knitting, embroidery and plain weaving, etc., facilitates the subsequent mass production of terminal crimping by using batch application jigs and optical detection. The use of metal terminals for puncture and compression can more reliably achieve fastening with the base body and stable connection with the conductive wire, improve the stability and reliability of the overall process and product, and improve the yield and production efficiency. Moreover, due to the arrangement of the metal terminals, it is possible to achieve reliable crimping and pluggable connection with the connector, which widens the design space and application scenarios of the flexible pressure sensor and facilitates application in multiple fields and products.

[0007] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0009] Figure 1 is a structural schematic diagram of a flexible pressure sensor provided by an embodiment of the application; Figure 2a is Figure 1 is an enlarged schematic diagram of the first view of the local structure of the flexible pressure sensor at A; Figure 2b is Figure 1 is a perspective schematic diagram of the first view of the local structure of the flexible pressure sensor at A; Figure 3 is Figure 1 is a sectional view schematic diagram of the local structure of the flexible pressure sensor at B; Figure 4a is Figure 3 is a schematic diagram of the local structure of the first electrode layer at C; Figure 4b is Figure 3 is a schematic diagram of the local structure of the second electrode layer at D; Figure 5 is Figure 1 is a perspective schematic diagram of the second view of the local structure of the flexible pressure sensor at A; Figure 6 is Figure 5 is a sectional view schematic diagram of the local structure of the flexible pressure sensor at E; Figure 7 is a structural schematic diagram of a flexible pressure sensor provided by an embodiment of the application; Figure 8 is Figure 7 is a local structure enlarged schematic view of the flexible pressure sensor at F shown in FIG. 1; Figure 9 is a step flow schematic diagram of a manufacturing method of a flexible pressure sensor according to an embodiment of the present application; Figure 10 is a step flow schematic diagram of a manufacturing method of a flexible pressure sensor according to an embodiment of the present application; Figure 11 is a step flow schematic diagram of a manufacturing method of a flexible pressure sensor according to an embodiment of the present application.

[0010] Legend of reference signs: 100, flexible pressure sensor; 10, main body; 101, first electrode layer; 102, second electrode layer; 103, resistance layer; 11, base body; 111, first base body; 112, second base body; 12, metal terminal; 121, first end of the metal terminal; 122, second end of the metal terminal; 123, first connecting part; 124, second connecting part; 13, conductive wire; 131, first electrode; 132, second electrode; 141, first cover layer; 142, second cover layer; 15, protective glue body; 16, auxiliary layer; 20, electric connection assembly; 21, electric connection wire; 211, first end of the electric connection wire; 212, second end of the electric connection wire; 22, electric connection flat cable; 30, circuit board assembly; 31, PCBA board; 41, first connector; 42, second connector; 43, third connector; 44, fourth connector; 45, foolproof structure.

[0011] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0013] The flowchart shown in the drawings is only an example and does not necessarily include all the contents and operations / steps, nor does it necessarily execute in the order described. For example, some operations / steps can be further decomposed, combined or partially merged, so the actual execution order may be changed according to the actual situation.

[0014] It should be understood that the terms used in this specification of the application are only for the purpose of describing particular embodiments of the application and are not intended to limit the application. As used in this specification and the appended claims, the singular forms "a," "an" and "the" are intended to include plural forms unless the context clearly dictates otherwise.

[0015] It should be understood that, in order to facilitate the clear description of the technical solutions of the embodiments of the application, in the embodiments of the application, the terms "first", "second", etc. are used to distinguish the same or similar items with basically the same function and role. For example, the first data and the second data are only used to distinguish different data, and do not limit the order. Those skilled in the art can understand that the terms "first", "second", etc. do not limit the quantity and execution order, and the terms "first", "second", etc. also do not necessarily mean different.

[0016] It should also be understood that the terms "and / or", "or" used in the specification and the appended claims mean one or more of the associated listed items and all possible combinations, and include these combinations.

[0017] With the continuous progress of sensor technology, flexible pressure sensors are increasingly widely used in electronic devices. Due to their unique flexibility and high sensitivity, these sensors are widely used in smart phones, smart wear, medical devices and other fields, especially in smart chairs such as massage chairs, car seats, aviation seats, space seats, and vehicle accessories such as vehicle refrigerators, vehicle temperature boxes, glove boxes, and interior accessories. Flexible pressure sensors are often used to detect pressure changes and assist in realizing interactive functions.

[0018] However, existing flexible pressure sensors face multiple challenges in practical applications. First, the poor bending resistance caused by the structure and process is a major problem. Because the sensor body, wires, and control mainboard have different physical properties and textures, the connection points between the conductive wires and the wires are very fragile, and after repeated bending, cracks or even breaks can occur, which not only greatly shortens the service life of the sensor, but also can cause the sensor to suddenly fail, affecting the normal use of the device. Second, the structure and manufacturing process of related technologies are relatively complex. In order to ensure softness, point-by-point electric welding + FPC board is often used to achieve connection, which not only leads to rising production costs, but also makes it impossible to achieve pluggable characteristics, severely limiting the design flexibility of the sensor and its application potential in modern electronic devices that pursue miniaturization and thinness. Third, the stability of the electrical connection also greatly affects user experience. Traditional welding or conductive adhesive bonding methods are prone to poor contact due to vibration, temperature changes, or humidity in complex, repeated, and frequent use scenarios such as medical beds and car seats, causing great inconvenience to users.

[0019] In addition, the existing connection method and manufacturing process also have obvious improvement space in cost-effectiveness, reliability, and firmness. Although traditional point-by-point electric welding and FPC connection are still widely used in some application scenarios, when faced with large-scale production and diversified application scenarios, production, design, adaptation, and even maintenance costs will increase dramatically, and its limitations gradually exposed. These problems, combined, not only severely restrict the large-scale production and market promotion of flexible pressure sensors, but also have a negative impact on users' actual use experience. Therefore, developing a flexible pressure sensor with excellent bending resistance, simple structure, and stable electrical connection is of great significance for promoting the widespread application and industrial development of this technology.

[0020] To solve some of the above problems, an embodiment of the present application provides a flexible pressure sensor. Please refer to Figure 1 and FIG. 2. The flexible pressure sensor 100 can include a main body 10, an electrical connection component 20, and a circuit board component 30. Among them, the main body 10 can include a base body 11, a plurality of metal terminals 12, and a plurality of conductive wires 13 arranged at intervals in the base body 11. It should be understood that Figure 2a corresponding to the plurality of conductive wires 13 in Figure 2b are arranged at intervals in the base body 11 and are arranged in the base body 11, which are not directly shown in Figure 2a and Figure 2b , those skilled in the art should understand that arranging at least part of the conductive wires 13 outside is only one embodiment provided by the present application, and therefore it cannot limit the protection scope of the present application.

[0021] Specifically, the conductive wire 13 can be arranged in the base body 11 by knitting, embroidering or flat knitting, and the plurality of metal terminals 12 are arranged on the base body 11 in an interval, each metal terminal 12 is connected to one conductive wire 13, and the material of the base body 11 includes cloth.

[0022] In this way, the softness and bending resistance of the cloth can be utilized to improve the flexibility of the flexible pressure sensor 100, enhance the bending resistance of the flexible pressure sensor 100, and prevent the flexible pressure sensor 100 from producing noise when applied to a bed or a seat 200, and prevent the flexible pressure sensor 100 from being broken or short-circuited after being pressed, deformed and bent.

[0023] In some embodiments, the electrical connection assembly 20 can include the electrical connection wire 22 and the first connector 41, the electrical connection wire 22 can include a plurality of electrical connection lines 21, and the first ends 211 of the plurality of electrical connection lines 21 can be connected to the first connector 41 in an array, and each metal terminal 12 can be electrically connected to the second end 212 of one electrical connection line 21.

[0024] Specifically, each metal terminal 12 can be electrically connected to the second end 212 of one electrical connection line 21 by crimping, welding or inserting. It should be understood that when the metal terminal 12 is connected to the second end 212 of the electrical connection line 21 by crimping or inserting, the metal terminal 12 can be directly crimped to the electrical connection line 21, or a wire harness connector such as a third connector 43 or a fourth connector 44 can be provided and arranged, and the metal terminal 12 can be crimped or inserted into the wire harness connector to achieve electrical connection. For example, the metal terminal 12 can be provided with a barb, and the metal terminal 12 can be fixedly connected to the wire harness connector through the barb. Since the number of conductive wires 13 is large, the arrangement of the wire harness connector and the metal terminal 12 can make the wiring connection of the conductive wires 13 clearer and safer, which is conducive to improving the yield and durability of the product. It should be understood that the electrical connection wire 22 of the electrical connection assembly 20 can be continuous, bifurcated or have nodes, which is not specifically limited here. For example, the electrical connection wire 22 can include at least a first section of wire and a second section of wire, wherein the first section of wire is electrically connected to the second section of wire through an adapter. The arrangement of the multiple sections of wire can improve the flexibility of the design of the length and layout of the electrical connection wire 22.

[0025] In some embodiments, the circuit board assembly 30 can include a PCBA board 31 and a second connector 42 disposed on the PCBA board 31, and the second connector 42 and the first connector 41 can be detachably connected through male-female connection. Through the design of detachable connection, it is very convenient for users to replace the circuit board assembly 30, or to extend, adapt, and the like, the electrical connection assembly 20. For example, in the trial production test of the automobile seat 200, the system integration team often needs to test the flexible pressure sensor 100 in multiple functions, which may sometimes cause current overload to affect the performance of the circuit board assembly 30 or even cause the circuit board assembly 30 to fail. The traditional flexible pressure sensor 100 often adopts an integrated design of the main body 10 and the circuit board assembly 30. When testing or using the flexible pressure sensor 100, once the circuit board assembly 30 fails, the entire flexible pressure sensor 100 product needs to be replaced, causing production delay, efficiency reduction, and cost increase. The detachable connection design of male-female connection not only realizes the pluggable and replaceable of the circuit board assembly 30, but also avoids the complex and low-yield process link of welding the conductive wire 13 to the circuit board assembly 30 in the traditional scheme, which is beneficial to mass production, cost saving, and clear and simple electrical wiring, which is conducive to positioning problems and design maintenance.

[0026] In this way, the small size, the mechanical structure strength, the high fixed connection strength, the pressure resistance, the bending resistance, the pull resistance, and the characteristics of not being easy to fall off due to external collision or scratching of the metal terminal 12 can be fully utilized, so that the connection between the conductive wire 13 and the electrical connection assembly 20 is more stable and reliable. On the other hand, as a kind of connector, the metal terminal 12 has a wide range of adaptable wire harness connectors. By connecting the conductive wire 13 with the metal terminal 12, the flexible pressure sensor 100 has the opportunity to access mass production standard and stable and reliable electrical connection scheme through the wire harness connector at a lower cost, and it is possible to realize flexible and diverse pluggable connection, and it is easy to adapt to industry and mass production. Thirdly, compared with traditional connection methods such as welding and FPC connection, the metal terminal 12 can be directly fixed to the base body 11 and electrically connected to the conductive wire 13 through crimping, piercing, and the like, which has great advantages in process and material cost, reliability, and firmness, and has the advantages of compact structure, simple process, stable signal, and durable and reliable performance.

[0027] In some embodiments, please refer to Figure 3 , Figure 4a and Figure 4bThe main body 10 can include a first electrode layer 101, a second electrode layer 102, and a resistance layer 103, wherein the first electrode layer 101 includes a first base 111 and a plurality of first electrodes 131 arranged at intervals on the first base 111, the second electrode layer 102 includes a second base 112 and a plurality of second electrodes 132 arranged at intervals on the second base 112, and the first base 111 and the second base 112 are made of cloth.

[0028] Specifically, the first electrodes 131 can be arranged in the first base 111 by knitting, plain weaving, or embroidering, the second electrodes 132 can be arranged in the second base 112 by knitting, plain weaving, or embroidering, and the extension direction of the second electrodes 132 intersects the extension direction of the first electrodes 131. The first electrodes 131 and the second electrodes 132 are respectively connected to two surfaces of the resistance layer 103, and the first electrodes 131 and the circuit board assembly 30 and / or the second electrodes 132 and the circuit board assembly 30 are electrically connected by the conductive wire 13. For example, the first electrodes 131 can extend in the X direction, and the second electrodes 132 can extend in the Y direction, and the X and Y directions intersect.

[0029] In some embodiments, the resistance layer 103 can be a cloth structure made of carbon fiber or other high-resistance conductive material. The cloth can be one or more of natural cloth, chemical cloth, cotton cloth, or polyester. By arranging the plurality of first electrodes 131 and the plurality of second electrodes 132 on the two surfaces of the resistance layer 103 and making the directions of the first electrodes 131 and the second electrodes 132 intersect, the pressure sensing points and the area of the pressure sensing points can be increased, the pressure detection accuracy can be improved, and due to the material of the resistance layer 103, the resistance layer 103 can be stably connected to other cloth bases 11 by weaving or other methods, ensuring the reliability and comfort of pressure detection.

[0030] In some embodiments, the flexible pressure sensor 100 can be laid on the surface of a mattress or a seat 200. When the user's body or limbs are attached to the mattress or the seat 200 and apply pressure, the pressure sensing points of the resistance layer 103 are deformed by external force or weight, and / or the contact area of the resistance layer 103 with the first electrodes 131 and the second electrodes 132 changes, resulting in a change in the resistance value of the resistance layer 103. The change in the resistance value is converted into an electrical signal, which is transmitted to the circuit board assembly 30 through the first electrodes 131 or the second electrodes 132. The circuit board assembly 30 transmits the processed electrical signal to an external terminal device. It should be further understood that the first electrodes 131 and the second electrodes 132 can be a conductive wire 13, which can include one or more of conductive wire, knitted wire, conductive yarn, conductive copper foil, or conductive adhesive tape.

[0031] In some embodiments, referring to Figure 5 and Figure 6The metal terminal 12 includes a first connecting portion 123 which penetrates the base 11 (e.g., the first base 111 or the second base 112, and can also penetrate more materials including the auxiliary layer 16, etc.) and is crimped to the conductive wire 13 (e.g., the first electrode 131 or the second electrode 132). Specifically, the first connecting portion 123 of the metal terminal 12 can include at least two penetrating members and a contact member or a contact surface provided between the penetrating members. When the penetrating members penetrate the base 11, the contact member can contact the conductive wire 13. Then, the penetrating members are clamped and crimped by a terminal crimping device, so that the metal terminal 12 is firmly arranged on the fabric base 11 and a stable electrical connection is achieved.

[0032] In some embodiments, please refer to Figure 7 and Figure 8 The conductive wire 13 can be electrically connected to the electrical connection assembly 20 through the wire connector. For example, the electrical connection assembly 20 can include a third connector 43, and the second end of the electrical connection cable 22 is fixedly arranged and electrically connected to the third connector 43. Specifically, the plurality of metal terminals 12 on the first base 111 and the second base 112 can be arranged in double rows in the third connector 43, and the metal terminals 12 are electrically connected to the second end 212 of the electrical connection cable 21 through the third connector 43.

[0033] In some embodiments, please refer to Figure 7 and Figure 8 The conductive wire 13 can be electrically connected to the electrical connection assembly 20 through the wire connector. For example, the electrical connection assembly 20 can include a third connector 43, and the second end of the electrical connection cable 22 is fixedly arranged and electrically connected to the third connector 43. Specifically, the plurality of metal terminals 12 on the first base 111 and the second base 112 can be arranged in double rows in the third connector 43, and the metal terminals 12 are electrically connected to the second end 212 of the electrical connection cable 21 through the third connector 43.

[0034] It should be understood that through the design of the wire connector and the conductive wire 13, the electrical connection reliability of the conductive wire 13 and the electrical connection assembly 20 and the circuit board assembly 30 can be greatly improved. Especially in transportation or harsh environment applications, since the conductive wire 13 is reliably connected to the metal terminal 12, and the metal terminal 12 is inserted into the wire connector, compared with the traditional method of directly welding the conductive wire 13 to the circuit board assembly 30, it can better resist risks such as jolting and impact. Moreover, the stability and reliability of the wire connector itself can facilitate subsequent wiring, anti-crosstalk design, etc., improving the design flexibility, modular degree and customizability of the product.

[0035] Specifically, the metal terminal 12 can be provided with a barb, the third connector 43 can be provided with a terminal accommodating cavity, and the metal terminal 12 can be clamped and fixed in the terminal accommodating cavity through the barb; or the metal terminal 12 can be provided with a barb, the fourth connector 44 can be provided with a terminal accommodating cavity, and the metal terminal 12 can be clamped and fixed in the terminal accommodating cavity through the barb.

[0036] In some embodiments, the first connector 41 and the second connector 42 are provided with a fool-proof structure 45; and / or, the third connector 43 and the fourth connector 44 are provided with a fool-proof structure 45. Through the design of the fool-proof structure 45, on the one hand, the use of the user is facilitated, and on the other hand, the problem of misplug in production testing is avoided, and the yield of mass production is improved.

[0037] In some embodiments, please refer to Figure 2b 、 Figure 7 and Figure 8 , the metal terminal 12 can include a second connecting portion 124 which can be electrically connected to the second end 212 of the electric connecting wire 21 by welding. It should be understood that the first end 121 of the metal terminal 12 can be understood as including the part of the metal terminal 12 which is in contact with the conductive wire 13 (such as the first connecting portion 123), and the second end 122 of the metal terminal 12 can be understood as including the part of the metal terminal 12 which directly connects with the electric connecting wire 21 or the bundle connector electric contact (such as the second connecting portion 124).

[0038] In some embodiments, the flexible pressure sensor 100 can further include a protective glue 15, and the plurality of metal terminals 12 are fixedly arranged in the protective glue 15. By fixing the plurality of metal terminals 12 in the protective glue 15, the welding points, crimping points or plug-in points and other electrically connected points of the metal terminals 12 can be protected, the waterproof and anti-crosstalk performance can be improved, and the physical reinforcement and protection effect can be achieved to prevent problems such as line displacement, entanglement and pulling in harsh environments such as impact and vibration, thereby improving the stability, reliability and safety of the flexible pressure sensor 100. In particular, the protective glue 15 can protect the relatively fragile welding points. Specifically, the material of the protective glue 15 can include low-temperature injection soft glue.

[0039] In some embodiments, at least one side of the base 11 is provided with an auxiliary layer 16, the auxiliary layer 16 is fixedly attached to the base 11, at least a part of the protective glue 15 is directly bonded to the auxiliary layer 16, and the material of the auxiliary layer 16 includes plastic such as PET, PI or PE. In this way, on the one hand, relative to the base 11, the other side (the auxiliary layer 16) formed after the metal terminal 12 and its piercing and holding are both of relatively hard material, and the connection stability between the metal terminal 12 and the cloth base 11 can be further improved by compressing the relatively soft material such as cloth in the middle with the two relatively hard sides, and a certain circuit protection effect such as waterproof, anti-electric shock and anti-crosstalk can be achieved, and on the other hand, by fixing the protective glue 15 to the auxiliary layer 16, the problem of unstable adhesion between the cloth and the protective glue 15 due to physical and chemical properties is solved, and greater design flexibility in cloth selection is provided. Through the arrangement of the plastic auxiliary layer 16, the connection strength between the protective glue 15 can be improved.

[0040] In some embodiments, the base body 11 comprises a first cover layer 141 covering at least a portion of the conductive wire 13, and the material of the first cover layer 141 comprises non-woven fabric. The first connecting portion 123 can be provided to penetrate the base body 11 and the first cover layer 141 and be connected to the conductive wire 13. Through the design of the first cover layer 141, the conductive wire 13 can be protected from impact, disconnection or short circuit, and the detection performance of the pressure sensor can be improved. It should be understood that the first connecting portion 123 can be provided with at least two penetrating needles, and the connecting portion between the two penetrating needles can form a contact surface. When the penetrating needles penetrate the multi-layer material or the base body 11, the contact surface is in contact with the conductive wire 13 between the two penetrating needles, forming an electrical connection. It should be further understood that the penetrating needles do not pierce the conductive wire 13, but pierce the material such as fabric on both sides of the conductive wire 13, and the conductive wire 13 is in contact and electrical connection with the connecting portion between the two penetrating needles. Then, during the pressing process, the two penetrating needles bend towards each other to form a clamping fixation to the base body 11 and the conductive wire 13.

[0041] In some embodiments, the first cover layer 141 can further be provided with a second cover layer 142, the material of the second cover layer 142 comprises flat-woven fabric, and the thickness of the second cover layer 142 is less than or equal to 0.15 mm; and / or, the material of the first cover layer 141 further comprises flat-woven fabric, and the thickness of the first cover layer 141 is less than or equal to 0.15 mm. In this way, on the one hand, the design of the layer thickness can improve the transparency of the cover layer, thereby facilitating automatic production based on optical alignment, improving the connection accuracy and reliability of the metal terminal 12 and the conductive wire 13, and avoiding problems such as miswelding and virtual welding that are prone to occur in traditional manual production such as spot welding. On the other hand, by laminating non-woven fabric and flat-woven fabric to form a composite material, the non-stretching property of flat-woven fabric can be used to prevent plastic deformation of non-woven fabric after stretching, so that the region is resistant to bending and pulling, and the signal is stable.

[0042] In some embodiments, the first cover layer 141 can be a part of the base body 11 (e.g., formed by folding, etc.), or connected to the base body 11. Two first cover layers 141 can be provided and attached to the first base body 111 and the second base body 112, respectively. For example, the fabric used for the base body 11 can comprise non-woven fabric and flat-woven fabric, thereby functionally equivalent to forming the first cover layer 141.

[0043] In some embodiments, the material of the first cover layer 141 or the second cover layer 142 can include an insulating material, and can cover at least a portion of the conductive wire 13. For example, the first cover layer 141 can be arranged between the first base body 111 and the second base body 112, and cover at least a portion of the area of the base body 11 that is not covered by the resistive layer 103. In this way, short circuiting of the conductive wire on the first base body 111 and the conductive wire on the second base body 112 in the area of the base body 11 that is not covered by the resistive layer 103 can be prevented, and the stability, accuracy and reliability of the circuit and signal can be ensured.

[0044] An electronic product is provided in an embodiment of the present application. The electronic product can include the flexible pressure sensor 100 as in any embodiment of the present application. The electronic product includes one or more of a robot, a medical bed, a vehicle body accessory, an interactive toy, a smart seat 200, a smart mattress, a smart pillow, a foot detection pad, and a wearable device. A manufacturing method of the flexible pressure sensor 100 is provided in an embodiment of the present application. Please refer to Figure 9 , Figure 9 A step schematic flow chart of the manufacturing method of the flexible pressure sensor 100 is provided in an embodiment of the present application. As shown in Figure 9 , the method specifically includes steps S101 to S104.

[0045] S101, providing a base body 11, a plurality of conductive wires 13 and a plurality of metal terminals 12.

[0046] The material of the base body 11 includes cloth. It should be understood that the cloth here can include a cloth fabric that has been woven, or a cloth fiber that has not been woven.

[0047] In some embodiments, the cloth fiber of the base body 11 can be provided, and the conductive wire 13 and the cloth fiber can be woven into a base body 11 with the conductive wire 13 penetrating and arranged therein by using a shuttle loom or a rib machine. In this way, an electrode layer similar to a woven fabric can be formed. In this way, the main body 10 part of the flexible pressure sensor 100 can be more solid in texture, compact in appearance, and hard in hand feeling, and can be reliable and durable, which is beneficial to work in various scenes such as factory workshops, mechanical arms, and wharfs. The weaving is also called flat weaving.

[0048] In some embodiments, the cloth fiber of the base body 11 can be provided, and the conductive wire 13 and the cloth fiber can be woven into a base body 11 with the conductive wire 13 penetrating and arranged therein by using a shuttle loom or a rib machine. In this way, an electrode layer similar to a woven fabric can be formed. In this way, the main body 10 part of the flexible pressure sensor 100 can be more solid in texture, compact in appearance, and hard in hand feeling, and can be reliable and durable, which is beneficial to work in various scenes such as factory workshops, mechanical arms, and wharfs. The weaving is also called flat weaving.

[0049] In some embodiments, the base body 11 can be a piece of non-woven fabric or the like, and the conductive wire 13 can be arranged on the base body 11 by using a computerized embroidery machine or the like to perform flat embroidery or rope embroidery. It should be understood that although the conductive wire 13 is not completely arranged through the base body 11 by rope embroidery, the effect of being arranged through the base body 11 can still be achieved. Moreover, since the conductive wire 13 is fixed to the base body 11 by the surface thread of rope embroidery, the conductive wire 13 does not need to be continuously arranged through the base body 11, so that the conductive wire 13 formed by a plurality of conductive fibers is not easily scratched by a large amount of flat embroidery to generate burrs, thereby avoiding problems such as short circuit, open circuit, unstable signal, poor touch, and the like caused by burrs, improving the detection performance of the flexible pressure sensor 100, and making it possible to increase the area of the flexible sensor body 10 and lengthen the electrode loop, thereby expanding the detectable area of the flexible pressure sensor 100 and making it possible to be applied to electronic devices such as medical beds.

[0050] It should be understood that by embroidering, flat weaving, or knitting the conductive wire 13 on the base body 11, the relative position of the conductive wire 13 is well fixed, so that it is possible to stably and reliably electrically connect the conductive wire 13 by using the metal terminal 12 to pierce and press in the subsequent process, and the low efficiency and high cost of extending the wire one by one and spot welding are avoided, so that it is possible to use jigs and / or optical alignment for batch, reliable, and high-yield production in the subsequent process, thereby improving the stability, accuracy, and precision of optical alignment. For example, since the conductive wire 13 is stably arranged at intervals on the base body 11, the optical alignment device only needs to detect the external contour or optical positioning point of the base body 11 to determine the relative position of the plurality of conductive wires 13, and based on the external contour or optical positioning point of the base body 11, the alignment is performed and the metal terminal 12 is directly and accurately welded, inserted, pierced, or pressed in a row, thereby realizing reliable, efficient, and accurate electrical connection between the conductive wire 13 and the metal terminal 12.

[0051] In some embodiments, the material of the base body 11 can include non-woven fabric, flat woven fabric, cotton fabric, or composite fabric, or the like. For example, the material of the base body 11 can include a composite fabric composed of non-woven fabric and flat woven fabric. Since the tensile resistance of non-woven fabric is limited, it is easy to plastically deform after stretching. By forming a composite fabric by bonding or combining flat woven fabric, the flexibility and tensile resistance of the material of the base body 11 as a whole can be enhanced by using the non-stretching characteristics of flat woven fabric, thereby improving the reliability and stability of the overall product of the flexible pressure sensor 100.

[0052] It should be understood that the non-woven fabric, flat woven fabric, cotton fabric, or composite fabric or the like can also form a separate covering layer bonded, combined, or sewn to the base body 11, and can also achieve a certain technical effect of improving the physical characteristics of the overall product of the flexible pressure sensor 100.

[0053] In some embodiments, the base body 11 can also be attached with an auxiliary layer 16. Due to the limitation of physical and chemical properties, the low-temperature injection soft glue is prone to generate more air gaps after being combined with the cloth, and the bonding strength is limited, and it is easy to weather and fall off after long-term use. In order to enhance the bonding strength between the protective glue 15 and the base body 11, the auxiliary layer 16 with smooth surface and flexible texture can be attached on the base body 11. The material of the auxiliary layer 16 can include PET, PI or PE plastic. Through the setting of the plastic auxiliary layer 16, the connection strength between the protective glue 15 and the base body 11 can be enhanced.

[0054] S102, the plurality of conductive wires 13 are arranged and inserted in the base body 11 by knitting, embroidering or flat knitting.

[0055] Specifically, the plurality of conductive wires 13 are arranged and inserted in the base body 11. Due to the particularity of the knitting, embroidering and flat knitting process, the plurality of conductive wires 13 are arranged and inserted in the base body 11, and the plurality of conductive wires 13 are arranged and inserted in the base body 11.

[0056] In some embodiments, the base body 11 can include a first base body 111 and a second base body 112, and the conductive wire 13 can include a first electrode 131 and a second electrode 132. Please refer to Figure 10 , Figure 10 A step schematic flow chart of a manufacturing method of a flexible pressure sensor 100 provided by an embodiment of the present application. As shown in the figure, the method specifically includes steps S102a to S102c. The steps S102a to S102c can be used to realize the step of arranging and inserting the plurality of conductive wires 13 in the base body 11 by knitting, embroidering or flat knitting. Figure 10

[0057] S102a, a first base body 111 is provided, and the plurality of conductive wires 13 are arranged and inserted in the first base body 111 by knitting, embroidering or flat knitting.

[0058] The conductive wire 13 in the first base body 111 is the first electrode 131. For example, the plurality of conductive wires 13 can be arranged and inserted in the first base body 111 by embroidering method such as rope embroidering, using computer embroidery machine. For example, the first base body 111 with the plurality of conductive wires 13 arranged and inserted can also be directly woven by using the base body 11 cloth fiber and the conductive wire 13 by flat knitting or knitting.

[0059] S102b, a second base body 112 is provided, and the plurality of conductive wires 13 are arranged and inserted in the second base body 112 by knitting, embroidering or flat knitting.​

[0060] The conductive wire 13 on the second substrate 112 is the second electrode 132. By way of example, the conductive wire 13 can be arranged on the second substrate 112 by a method such as embroidery, using a computerized embroidery machine. By way of example, the second substrate 112 can be directly woven by a method such as flat weaving or knitting, using the fabric fibers of the substrate 11 and the conductive wire 13.

[0061] S102c, providing the resistance layer 103, and connecting the first electrode 131 and the second electrode 132 to two sides of the resistance layer 103, respectively.

[0062] The extension direction of the second electrode 132 intersects the extension direction of the first electrode 131. For example, because the extension direction of the second electrode 132 intersects the extension direction of the first electrode 131, in combination with the resistance layer 103 arranged between the first electrode 131 and the second electrode 132, a plurality of pressure sensing points can be naturally formed. When the pressure sensing points are pressed, the resistance value at the point will change, thereby causing the corresponding first electrode 131 and second electrode 132 to change. By detecting the electrical data of the plurality of first electrodes 131 and second electrodes 132, the pressure sensing point where the pressure is applied and the resistance value change can be located, and the pressure and other mechanical data can be determined by calculation according to the resistance value change, thereby realizing pressure detection.

[0063] S103, corresponding to the conductive wire 13, the first end 121 of the metal terminal 12 is pierced into the substrate 11, and the metal terminal 12 and the conductive wire 13 are electrically connected.

[0064] Each metal terminal 12 is connected to one conductive wire 13. It can be understood that when the metal terminal 12 is connected to the conductive wire 13, it can be a one-to-one correspondence, or it can be left blank or not connected according to actual needs. For example, there can be four metal terminals 12 and four conductive wires 13, and each metal terminal 12 and a conductive wire 13 are electrically connected one by one. For example, there can be three metal terminals 12, and four conductive wires 13 are arranged on the substrate 11, but the three metal terminals 12 are connected to three conductive wires 13 one by one, and one conductive wire 13 is not connected according to actual needs. For example, there can be five metal terminals 12 and six conductive wires 13, but according to actual needs, one metal terminal 12 and two conductive wires 13 need to be left as blank spare pins, and the remaining four metal terminals 12 and four conductive wires 13 can be connected one by one.

[0065] In some embodiments, an auxiliary layer 16, a cover layer, or the like can be provided before the metal terminal 12 pierces the metal terminal 12, so that the metal terminal 12 can simultaneously pierce multiple layers of materials and bite, improve the stability of the combination between the materials, avoid the problems of simple adhesive paste, easy to weather, easy to fall off, and the like, and strengthen the overall product structure strength and reliability of the flexible pressure sensor 100.

[0066] For example, a cover layer can be provided before the first end 121 of the metal terminal 12 pierces the base 11. The cover layer can be arranged on the side of the first base 111 away from the second base 112, and / or arranged on the side of the second base 112 away from the first base 111. The first end 121 of the metal terminal 12 pierces the base 11 and the cover layer corresponding to the conductive wire 13.

[0067] For example, a cover layer can be provided before the first end 121 of the metal terminal 12 pierces the base 11, and the cover layer is arranged on the base 11. The material of the cover layer can include an insulating material, and the cover layer can be arranged on the side of the first base 111 facing the second base 112, and / or the side of the second base 112 facing the first base 111. Specifically, the cover layer can cover at least a portion of the conductive wire 13, so as to prevent the conductive wire 13 on the first base 111 and the second base 112 from causing a short circuit, resulting in unstable circuit, unreliable signal and measurement results, by using the insulating property of the cover layer.

[0068] In some embodiments, an electrical connection assembly 20 can be provided, and the second end 122 of each metal terminal 12 is electrically connected to the second end 212 of an electrical connection wire 21. The electrical connection assembly 20 can include an electrical connection ribbon 22 and a first connector 41, and the electrical connection ribbon 22 includes a plurality of electrical connection wires 21, and the first ends 211 of the plurality of electrical connection wires 21 are connected to the first connector 41 in an array.

[0069] For example, the second end 122 of each metal terminal 12 can be electrically connected to the second end 212 of an electrical connection wire 21 by welding. Further, a protective glue 15 can be arranged on the metal terminal 12 and the electrical connection wire 21 after the second end 122 of each metal terminal 12 is welded to the second end 212 of an electrical connection wire 21. For example, a soft glue can be arranged around the welding point by a low-temperature injection molding process, so as to fix at least a portion of the metal terminal 12 and the electrical connection wire 21 in the protective glue 15, enhance the mechanical structure strength and anti-interference ability of the connection point, and avoid short circuit, open circuit, and protect the circuit loop.

[0070] Exemplarily, a third connector 43 can be provided, and the second end 122 of the metal terminal 12 is inserted into the third connector 43. The third connector 43 can be arranged on the electric connection assembly 20, and the second ends 212 of the plurality of electric connection wires 21 are connected to the third connector 43 in an array, and the metal terminal 12 is electrically connected to the second ends 212 of the electric connection wires 21 through the third connector 43.

[0071] Exemplarily, a fourth connector 44 can be provided, and the second end 122 of the metal terminal 12 is inserted into the fourth connector 44, and the fourth connector 44 is connected to the electric connection assembly 20. The electric connection assembly 20 is provided with the third connector 43, and the fourth connector 44 is connected to the electric connection assembly 20 through the third connector 43.

[0072] It should be understood that the metal terminal 12 can be provided with a barb, and the third connector 43 can be provided with a terminal accommodating cavity, and the metal terminal 12 is clamped and fixed in the terminal accommodating cavity through the barb; or the metal terminal 12 can be provided with a barb, and the fourth connector 44 can be provided with a terminal accommodating cavity, and the metal terminal 12 is clamped and fixed in the terminal accommodating cavity through the barb.

[0073] In some embodiments, the metal terminal 12 can be designed into a single row, a double row, and the like, and the row operation process can be improved to improve production efficiency and product yield. For example, the second end 122 of the plurality of metal terminals 12 can be electrically connected to the electric connection ribbon wire 22 by row welding or row insertion. For another example, the first end 121 of the plurality of metal terminals 12 can be pierced into the base body 11 in an array corresponding to the plurality of conductive wires 13. For another example, the first end 121 of the plurality of metal terminals 12 can be pressed to the plurality of conductive wires 13 in an array corresponding to the plurality of conductive wires 13.

[0074] In some embodiments, the electric circuit board assembly 30 provided with the second connector 42 can be provided after the electric connection assembly 20 is provided, and the first connector 41 is inserted into the second connector 42. The second connector 42 can form a male-female detachable connection with the first connector 41.

[0075] S104, the first end 121 of the metal terminal 12 is pressed and fixed to the base body 11 to obtain the flexible pressure sensor 100.

[0076] It should be understood that the flexible pressure sensor 100 can be provided with a circuit board assembly 30 such as a control mainboard, or can not be provided with the circuit board assembly 30, but the driving control program is uploaded to the host computer, and the communication with the host computer is directly performed through the serial port, so as to realize the pressure detection. It should be further understood that the circuit board assembly 30 can be installed on the flexible pressure sensor 100 for testing the product in the production process, or the circuit board assembly 30 can not be installed or be detached from the flexible pressure sensor 100 before delivery for convenient transportation, so that the circuit board assemblies 30 with different shapes are detached for transportation, and the reliability and safety of the final installation and use are improved. The specific setting mode and whether the final product includes the circuit board assembly 30 are not limited here.

[0077] In some embodiments, a terminal crimping device and a crimping jig can be provided; the metal terminals 12 are hung in a row on the terminal crimping device, at least a part of the base body 11 is arranged on the crimping jig; and the metal terminals 12 are crimped in a row on the base body 11. Through the design of the row of puncture and the row of crimping fixation with the jig, the signal connection stability and reliability of the flexible pressure sensor 100 can be effectively improved, and mass production and high yield can be facilitated.

[0078] In some embodiments, please refer to Figure 11 , Figure 11 A step schematic flow chart of a manufacturing method of a flexible pressure sensor 100 according to an embodiment of the present application is provided. As Figure 11 shown, the manufacturing method of the flexible pressure sensor 100 can further include steps S201 to S203, so as to further strengthen the connection strength between the conductive wire 13, the metal terminal 12 and the electrical connection assembly 20.

[0079] S201, providing an auxiliary layer 16.

[0080] The material of the auxiliary layer 16 can include PET, PI or PE plastic. It should be understood that since the auxiliary layer 16 has the function of making the protective glue 15 more firmly connected, the auxiliary layer 16 does not need to cover all the area of the base body 11, but only needs to cover the part required for firm adhesion of the protective glue 15. Therefore, the area of the auxiliary layer 16 can be smaller than the base body 11 part of the flexible pressure sensor 100.

[0081] S202, the auxiliary layer 16 is attached to the base body 11.

[0082] It should be understood that the effect of attaching the auxiliary layer 16 to the base body 11 can be achieved by means of adhesion, puncture fixation, cohesive fixation, etc. For example, after attaching the auxiliary layer 16 to the base body 11, the metal terminal 12 can be used for pressure bonding, thereby achieving physical and chemical double firm fixation, improving reliability and stability, preventing chemical bonding points from falling off after weathering, etc.

[0083] It should be further understood that the step of attaching the auxiliary layer 16 to the base body 11 can occur before the step of puncturing the first end 121 of the metal terminal 12 into the base body 11, or after the step of pressure bonding the first end 121 of the metal terminal 12 to the base body 11. If it occurs before the step of puncturing the first end 121 of the metal terminal 12 into the base body 11, the metal terminal 12 can penetrate and fix the auxiliary layer 16 and the base body 11 together, enhancing the connection strength between the auxiliary layer 16 and the base body 11, and achieving double protection of chemical adhesion and physical fastening. If it occurs after the step of puncturing the first end 121 of the metal terminal 12 into the base body 11, it can also serve as an adhesion medium, on the one hand ensuring firm adhesion of the auxiliary layer 16 to the base body 11, and on the other hand ensuring firm adhesion of the protective gel 15 to the auxiliary layer 16, avoiding problems such as easy generation of air bubbles, unfirm adhesion, easy weathering and falling off after long-term use, etc. when the protective gel 15 is directly adhered to the base body 11 or other cloth.

[0084] S203, setting a protective gel 15.

[0085] Specifically, the protective gel 15 can be set by low-temperature injection molding, wherein the protective gel 15 can be a low-temperature injection molding soft gel. The protective gel 15 can cover at least a part of the auxiliary layer 16 and at least a part of the metal terminal 12. Specifically, the auxiliary layer 16 can be attached to the outward face of the base body 11. For example, when the base body 11 includes a first base body 111 and a second base body 112, the auxiliary layer 16 can be attached to the side of the first base body 111 away from the second base body 112, or the side of the second base body 112 away from the first base body 111. For another example, when the base body 11 has only one base body 11, the auxiliary layer 16 can be attached to the first face or the second face of the base body 11.

[0086] In some embodiments, a layer of covering can be provided on the surface of the conductive wire 13 or the substrate 11, and the material of the covering can include cloth, and the thickness of the covering can be less than 0.1-0.15 mm. Through the design of this thin layer of covering, on the one hand, a transparent texture and effect can be produced, so that the conductive wire 13 can be clearly visible to optical detection instruments, and the alignment and positioning operation of tools such as pressure bonding, feeding and discharging in the automatic pressure bonding process can be facilitated. On the other hand, the circuit protection effect of the covering can be fully utilized to prevent the conductive wire 13 from being completely exposed to the outside environment, thereby improving the accuracy and reliability of the pressure detection data.

[0087] Typically but not limitedly, the thickness of the covering can be less than any of 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm or 0.15 mm, or in a range between any two of 0.03 mm to 0.15 mm.

[0088] In some embodiments, the flexible pressure sensor 100 can be provided on the surface of a robot, an interactive toy, a smart pillow, a foot detection mat, a wearable device, etc. When a user or a target object exerts a force on the detection point or the detection surface, the resistance layer 103 is deformed by the external force or the weight, and / or the contact area between the resistance layer 103 and the first electrode 131 and the second electrode 132 changes, resulting in a change in the resistance value in the loop formed by the resistance layer 103, the first electrode 131 and the second electrode 132. The change in the resistance value is converted into an electrical signal and transmitted to the upper computer or the circuit board assembly 30 through the first electrode 131 or the second electrode 132, and the circuit board assembly 30 transmits the processed electrical signal to an external terminal device.

[0089] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements shall be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

[0090] The above disclosure provides many different implementations or examples for implementing the different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described in the above. Of course, they are merely examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various implementations and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0091] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. The exemplary expressions of the above terms in the present specification do not necessarily refer to the same embodiment or example. Also, the specific feature, structure, material or characteristic described can be combined in any one or more embodiments or examples in an appropriate manner.

Claims

1. A method of manufacturing a flexible pressure sensor, characterized by, The method comprises the following steps: providing a base body, a plurality of conductive wires and a plurality of metal terminals, wherein the material of the base body comprises cloth; arranging the plurality of conductive wires in the base body by knitting, embroidering or plain weaving, and spacing the plurality of conductive wires on the base body; piercing the first end of the metal terminal into the base body corresponding to the conductive wire, and arranging the metal terminal to be electrically connected with the conductive wire, wherein each metal terminal is connected with one conductive wire; pressing and fixing the first end of the metal terminal to the base body to obtain a flexible pressure sensor.

2. The method of claim 1, wherein, The base body comprises a first base body and a second base body, and the conductive wire comprises a first electrode and a second electrode; arranging the plurality of conductive wires in the base body by knitting, embroidering or plain weaving, and spacing the plurality of conductive wires in the base body comprises: providing a first base body, and arranging the plurality of conductive wires in the first base body by knitting, embroidering or plain weaving, wherein the conductive wire in the first base body is a first electrode; providing a second base body, and arranging the plurality of conductive wires in the second base body by knitting, embroidering or plain weaving, wherein the conductive wire in the second base body is a second electrode; providing a resistance layer, and connecting the first electrode and the second electrode to two sides of the resistance layer respectively, and the extension direction of the second electrode intersects with the extension direction of the first electrode.

3. The method of claim 2, wherein, Before the step of piercing the first end of the metal terminal into the base body, the method further comprises: providing a cover layer, wherein the material of the cover layer comprises non-woven fabric and / or plain woven fabric, and the thickness of the cover layer is less than or equal to 0.15 mm; arranging the cover layer on the side of the first base body away from the second base body, and / or arranging the cover layer on the side of the second base body away from the first base body; piercing the first end of the metal terminal into the base body and the cover layer corresponding to the conductive wire.

4. The method of claim 1, wherein, arranging the plurality of conductive wires in the base body by knitting, embroidering or plain weaving comprises: arranging the plurality of conductive wires in the base body by weaving with a shuttle loom or a collar loom; or arranging the plurality of conductive wires in the base body by knitting with a circular knitting machine or a free interval.

5. The method of claim 1, wherein, arranging the plurality of conductive wires in the base body by knitting, embroidering or plain weaving comprises: arranging the plurality of conductive wires in the base body by embroidering with a computer embroidery machine; or arranging the plurality of conductive wires in the base body by plain embroidering with a computer embroidery machine.

6. The method of claim 1, wherein, The method further comprises: providing an electrical connection assembly, wherein the electrical connection assembly comprises an electrical connection flat cable and a first connector, and the electrical connection flat cable comprises a plurality of electrical connection wires, and the first end of the plurality of electrical connection wires is connected to the first connector in an array; electrically connecting the second end of each metal terminal to the second end of one electrical connection wire.

7. The method of claim 6, wherein, The step of electrically connecting the second end of each metal terminal to the second end of one electrical connection wire comprises: electrically connecting the second end of each of the metal terminals to the second end of one of the electric connection wires by welding; or providing a third connector, and inserting the second end of the metal terminal into the third connector, wherein the third connector is arranged in the electric connection assembly, the second ends of the plurality of electric connection wires are connected to the third connector in a row, and the metal terminal is electrically connected to the second ends of the electric connection wires through the third connector; or providing a fourth connector, and inserting the second end of the metal terminal into the fourth connector, and connecting the fourth connector to the electric connection assembly through the third connector, wherein the electric connection assembly is provided with the third connector, and the fourth connector is connected to the electric connection assembly through the third connector.

8. The method of claim 6, wherein, The method comprises: electrically connecting the second ends of the plurality of metal terminals to the electric connection wire in a row by welding or inserting; or piercing the first ends of the plurality of metal terminals into the substrate in a row corresponding to the plurality of conductive wires; or pressing the first ends of the plurality of metal terminals to the plurality of conductive wires in a row corresponding to the plurality of conductive wires.

9. The method of claim 8, wherein, Before the row welding, row inserting, row piercing, or row pressing, the method further comprises: detecting the external contour or optical positioning point of the substrate; performing row welding, row inserting, row piercing, or row pressing according to the external contour or optical positioning point.

10. The method of claim 6, wherein, After the electric connection assembly is provided, the method further comprises: providing a circuit board assembly, wherein the circuit board assembly is provided with a second connector capable of forming a male-female matched detachable connection with the first connector; inserting the first connector into the second connector.

11. The method of claim 10, wherein, After the first end is electrically connected to the conductive wire, the method further comprises: arranging the protective gel by low-temperature injection molding, wherein the protective gel is a low-temperature injection soft gel.

12. The method according to any one of claims 1 to 11, characterized in that, The method further comprises: providing an auxiliary layer, wherein the material of the auxiliary layer comprises plastic; attaching the auxiliary layer to the substrate; arranging a protective gel, wherein the protective gel covers at least a portion of the auxiliary layer and at least a portion of the metal terminal.

13. The method of claim 12, wherein, The method of attaching the auxiliary layer to the substrate comprises: attaching the auxiliary layer to the outward surface of the substrate.

14. The method according to any one of claims 1 to 11, characterized in that, Before the first end of the metal terminal is pierced into the substrate, the method comprises: providing a cover layer, wherein the material of the cover layer comprises insulating material; arranging the cover layer on the substrate, wherein the cover layer covers at least a portion of the conductive wire.

15. A flexible pressure sensor, characterized by The manufacturing process comprises the manufacturing method of the flexible pressure sensor according to any one of claims 1-14.

Images