Sensor sheet

Abstract

A sensor sheet (18) is provided with: an insulating insulator sheet (24); a first electrode sheet (25) which is formed from a first conductive cloth (41) having a first plating layer (44) comprising a metal on the surface thereof, and which is disposed on one surface of the insulator sheet (24); and a first auxiliary member (50) which is provided with a first conductive material (50a) that is conductive, is disposed on one surface of the first electrode sheet (25) in a state in which the first conductive cloth (41) is electrically connected to the first conductive material (50a), and forms an electrical conduction path at a location where the first plating layer (44) is broken.

Description

Technical Field

[0001] The present invention relates to a sensor sheet. Background Art

[0002] Patent Document 1 describes a transducer in which an electrode sheet is arranged on one surface of an insulating sheet. The transducer can function as a sensor sheet that detects contact or proximity of a conductor having a potential by utilizing a change in electrostatic capacitance between electrodes.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-68414 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the above-mentioned technology, the electrode sheet may be formed of a conductive cloth. The conductive cloth is produced by forming a plated layer made of metal on a cloth woven from woven yarns.

[0008] There is a risk that the plating layer formed on the conductive cloth may break when a force is applied from the outside to the sensor sheet formed of the conductive cloth. If the plating layer breaks, the electrical conduction path in the portion may be disconnected. Therefore, there is a concern that the electrical conduction path in the electrode sheet may be disconnected, thereby increasing the resistance value of the sensor sheet.

[0009] The present invention has been made in view of this background, and provides a sensor sheet that suppresses an increase in resistance value.

[0010] Means used to solve problems

[0011] One embodiment of the present invention is a sensor sheet,

[0012] The sensor sheet comprises:

[0013] Insulating insulator sheets;

[0014] a first electrode sheet formed of a first conductive cloth having a first plated layer made of metal on a surface thereof, and arranged on one surface of the insulating sheet; and

[0015] The first auxiliary member includes a first conductive material having electrical conductivity and is disposed on one surface of the first electrode sheet in a state where the first conductive cloth and the first conductive material are electrically connected to form an electrical conduction path at a portion where the first plating layer is broken.

[0016] Effects of the Invention

[0017] According to one embodiment of the present invention, even if the first plated layer formed by the first conductive cloth constituting the first electrode sheet is broken, the first conductive material of the first auxiliary member can form an electrical conduction path to assist the electrical conduction of the first electrode sheet, thereby suppressing an increase in the resistance value of the sensor sheet.

[0018] In addition, the reference numerals in parentheses described in the claims indicate the corresponding relationship with the specific means described in the embodiments described later, and do not limit the technical scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view showing a steering wheel to which the sensor sheet according to the first embodiment is mounted.

[0020] Figure 2 yes Figure 1 AA line section view.

[0021] Figure 3 This is a plan view showing the sensor sheet according to the first embodiment.

[0022] Figure 4 yes Figure 3 BB line cross-sectional view.

[0023] Figure 5 is an enlarged plan view showing a portion of the first electrode sheet in Embodiment 1, Figure 5 (a) shows the state where the first plating layer is not broken. Figure 5 (b) shows a state where a part of the first plating layer is broken.

[0024] Figure 6 This is a partially enlarged plan view showing a third conductive cloth of the first auxiliary member according to the first embodiment.

[0025] Figure 7 This is a partially enlarged plan view showing another embodiment of the third conductive cloth.

[0026] Figure 8 This is a partially enlarged side cross-sectional view showing the sensor sheet according to the first embodiment.

[0027] Fig. 9 This is a schematic cross-sectional view for explaining the electrical conduction path of the sensor sheet according to the first embodiment.

[0028] Fig.10 This is a schematic plan view showing the relationship between the orientation direction of the first woven yarns of the first conductive cloth and the orientation direction of the third woven yarns of the third conductive cloth according to the first embodiment.

[0029] Fig.11 It is a cross-sectional view showing a sensor sheet according to the second embodiment.

[0030] Fig.12 It is a cross-sectional view showing a sensor sheet according to the third embodiment.

[0031] Fig.13 It is a cross-sectional view showing a sensor sheet according to the fourth embodiment.

[0032] Fig.14 This is a partially enlarged plan view showing the second conductive cloth according to the fourth embodiment.

[0033] Fig.15 is a cross-sectional view showing a sensor sheet according to Embodiment 5, Fig.15 (a) is a mode in which the first auxiliary member is arranged on the first surface side of the first electrode sheet, and the third auxiliary member is arranged on the surface on the opposite side of the insulating sheet in the second electrode sheet, Fig.15 (b) is a mode in which the first auxiliary member is arranged on the second surface side of the first electrode sheet, and the third auxiliary member is arranged on the surface of the second electrode sheet on the insulating sheet side.

[0034] Fig.16 is a cross-sectional view showing a sensor sheet according to Embodiment 6, Fig.16 (a) is a mode in which the first auxiliary member is arranged on the first surface of the first electrode sheet, and the second auxiliary member is arranged on the second surface of the first electrode sheet, Fig.16 (b) is a mode in which the plurality of first splitting auxiliary members and the plurality of second splitting auxiliary members do not overlap in the stacking direction. Fig.16 (c) is a mode in which a plurality of first division assisting members and a plurality of second division assisting members overlap in the stacking direction. DETAILED DESCRIPTION

[0035] (Implementation Method 1)

[0036] 1. Overview of sensor sheet

[0037] The sensor sheet is an electrostatic type, and functions as a sensor that detects the contact or approach of a conductor with a potential by utilizing the change in electrostatic capacitance between electrodes. When a conductor with a potential contacts or approaches the sensor sheet, the electrostatic capacitance between the electrodes changes, and a voltage corresponding to the changed electrostatic capacitance between the electrodes is detected, thereby detecting the contact or approach of the conductor.

[0038] The sensor sheet is mounted on, for example, a steering wheel of a vehicle to detect whether a passenger's hand (fingers, palm, back of hand, etc.) is in contact with or close to the steering wheel.

[0039] 2. Overall structure of the steering wheel 10

[0040] First, refer to Figure 1-2The structure of the steering wheel 10 will be described. Figure 1 As shown, the steering wheel 10 includes a core 11, a ring 12, and a plurality of (three in this embodiment) connecting portions 13 connecting the core 11 and the ring 12. In the following description, sometimes, for a plurality of identical components, only some of the components are marked with reference numerals, and reference numerals are omitted for the other components.

[0041] The ring portion 12 is formed into a circular ring shape. However, the ring portion 12 is not limited to a circular shape, and can be formed into any shape. Figure 2 As shown, the cross-sectional shape of the ring portion 12 at right angles to the axis is formed into a circular shape, for example.

[0042] 3. Detailed Structure of Steering Wheel 10

[0043] Reference Figure 1-2 , the detailed structure of the steering wheel 10 will be described. In particular, the detailed structure of the ring portion 12 will be described.

[0044] The ring portion 12 includes a core 16, a resin inner layer material 17, a sensor sheet 18, and a skin material 19. The core 16 constitutes the central portion of the ring portion 12 and is formed into a shape corresponding to the shape of the ring portion 12. In other words, the core 16 is formed into a circular ring shape and has a circular cross-section at right angles to the axis. Here, the cross-sectional shape of the core 16 at right angles to the axis is not limited to a circle, and can be set to any shape such as an ellipse, an egg shape, a U shape, a C shape, a polygon, etc. The core 16 of this embodiment is formed of a metal such as aluminum and magnesium and has conductivity. The material of the core 16 can be applied to materials other than metal.

[0045] The resin inner layer material 17 covers the outer surface of the core 16 over the entire circumference of the annular shape of the core 16 and the entire circumference of the circular cross-sectional shape of the core 16. In this embodiment, the cross-section of the resin inner layer material 17 at right angles to the axis is formed into a circle. Assuming that the core 16 has a U-shaped cross-section at right angles to the axis, the resin inner layer material 17 is filled in the U-shaped recess of the core 16 on the basis of being filled in the radially outer side of the cross-section at right angles to the axis of the core 16. The resin inner layer material 17 is formed on the outer surface side of the core 16 by injection molding and is directly bonded to the outer surface of the core 16. The cross-sectional shape at right angles to the axis of the resin inner layer material 17 is not limited to a circle, and can be set to any shape such as an egg shape, an ellipse, a polygon, etc. The resin inner layer material 17 is formed, for example, by a foamed resin. The resin inner layer material 17 uses, for example, a foamed polyurethane resin. In addition, the resin inner layer material 17 can also use a non-foamed resin.

[0046] The sensor sheet 18 is wound around the outer surface of the resin inner layer material 17. The sensor sheet 18 is formed into a C-shape in a state of being wound around the resin inner layer material 17. The sensor sheet 18 will be described in detail later.

[0047] The skin material 19 covers the outer surface of the sensor sheet 18 (the surface of the sensor sheet 18 on the side opposite to the resin inner layer material 17) over the entire annular circumference of the sensor sheet 18. That is, when the electrode portion of the sensor sheet 18 is exposed on the side of the surface 27 of one side of the insulator sheet 24, the skin material 19 functions as a covering material of the sensor sheet 18. The skin material 19 is formed by injection molding, and is wound around the outer surface side of the sensor sheet 18 and bonded to the outer surface of the sensor sheet 18. The skin material 19 is formed of, for example, a polyurethane resin. The outer surface of the skin material 19 constitutes an exterior surface. It is preferable that a non-foamed polyurethane resin or a slightly foamed polyurethane resin is used for the skin material 19.

[0048] 4. Overall structure of the sensor sheet 18

[0049] Reference Figure 3-4 The overall structure of the sensor sheet 18 of the first embodiment is described. Figure 3 As shown in FIG. 1 , the sensor sheet 18 is formed in a long strip shape in the longitudinal direction X as a whole. The sensor sheet 18 includes a sheet main body 20 formed in a rectangular shape as a whole. The sheet main body 20 includes a pair of long side edges 20a extending along the longitudinal direction X, and a pair of short side edges 20b extending in a direction intersecting the longitudinal direction X. In addition, in the following description, the arrow line X indicates the longitudinal direction X of the sensor sheet 18, the arrow line Y indicates the intersecting direction intersecting the longitudinal direction X, and the arrow line Z indicates the thickness direction (stacking direction) of the sensor sheet 18. In addition, in the following drawings, although not specifically mentioned, the thickness dimension is sometimes emphasized for the convenience of description.

[0050] The sheet recess 21 that is recessed inward in the intersecting direction Y that intersects the long side direction X is formed in the pair of long side edges 20a of the sheet body 20. The sheet recess 21 is formed at a position including an overlapping region in the intersecting direction Y of the pair of long side edges 20a of the sheet body 20. However, the sheet recess 21 may be formed only in one of the pair of long side edges 20a.

[0051] A plurality of (four in this embodiment) sheet recesses 21 are formed at intervals on one long side edge 20a. However, one sheet recess 21 may be formed on one long side edge 20a. In addition, two to three or five or more sheet recesses 21 may be formed on one long side edge 20a.

[0052] A sheet extension portion 22 is formed at one of the pair of long side edges 20a of the sheet body portion 20, and the sheet extension portion 22 extends from one of the long side edges 20a at positions close to both ends of the sheet body portion 20 in the long side direction X in a direction intersecting the long side direction X. In addition, the sheet extension portion 22 can be formed at any position of the sheet body portion 20.

[0053] The sheet extension portion 22 is formed in a shape that is bent in the longitudinal direction X after being extended in the cross direction Y. The sheet extension portion 22 includes a connecting portion 22a that connects the sheet extension portion 22 to the sheet main body 20, and a wire connecting portion 22b that extends from the end of the connecting portion 22a in the longitudinal direction X and connects the wire 32. In addition, the sheet extension portion 22 (connecting portion 22a, wire connecting portion 22b) can be set to any shape, such as using the connecting portion 22a of the sheet extension portion 22 also as the wire connecting portion 22b.

[0054] Figure 4 FIG. 1 is a cross-sectional view of the sensor sheet 18. The sensor sheet 18 includes an insulator sheet 24, a first electrode sheet 25, a second electrode sheet 26, a first auxiliary member 50, and a third auxiliary member 80. The first electrode sheet 25 and the second electrode sheet 26 are conductive and formed in a layered form.

[0055] The first electrode sheet 25 is stacked on one surface 27 of the insulating sheet 24. The first electrode sheet 25 is formed in a shape slightly smaller than the insulating sheet 24. Thus, the edge of one surface 27 of the insulating sheet 24 is exposed from the edge of the first electrode sheet 25.

[0056] like Figure 3 As shown in FIG. 1 , the first electrode sheet 25 includes a main body 25a that is long in the longitudinal direction X. A recess 30 that is recessed inward in the cross direction Y is formed at a position of the main body 25a that corresponds to the sheet recess 21 of the sensor sheet 18. The portion of the main body 25a sandwiched between the two recesses 30 arranged in the cross direction Y is formed as a first neck 25b (an example of a neck) that is narrower in width than other portions in the cross direction Y. The portion of the main body 25a that is adjacent to the first neck 25b in the longitudinal direction X is formed as a wide portion 25c that is wider than the first neck 25b in the cross direction Y.

[0057] An extension portion 25d is formed at a position of the first electrode sheet 25 corresponding to the sheet extension portion 22 of the sensor sheet 18, and the extension portion 25d extends from the long side edge along the long side direction X of the main body portion 25a of the first electrode sheet 25 in the cross direction Y intersecting the long side direction X. The extension portion 25d includes a second neck portion 25e (an example of a neck portion) overlapping the connecting portion 22a of the sheet main body 20, and a terminal portion 25f extending from the end of the second neck portion 25e in the cross direction Y and connected to the core wire 32a exposed from the end of the electric wire 32. The second neck portion 25e is formed between the main body portion 25a and the terminal portion 25f. The terminal portion 25f is connected to an external circuit via the electric wire 32.

[0058] The width dimension of the second neck portion 25e in the longitudinal direction X is formed to be smaller than the length dimension of the terminal portion 25f in the longitudinal direction X and the width dimension in the cross direction Y. The wide width portion 25c connected to the second neck portion 25e in the first electrode sheet 25 is formed to be wider than the second neck portion 25e in the longitudinal direction X. The terminal portion 25f connected to the second neck portion 25e in the first electrode sheet 25 is formed to be wider than the second neck portion 25e in the longitudinal direction X, and is set as an example of the wide width portion 25c.

[0059] The terminal portion 25f is connected to a core wire 32a exposed from an end portion of the electric wire 32. The core wire 32a and the terminal portion 25f are electrically connected by a known method such as welding, soldering, or ultrasonic welding.

[0060] like Figure 4 As shown, the second electrode sheet 26 is stacked on the other surface 28 of the insulating sheet 24. The second electrode sheet 26 is formed in a shape slightly smaller than the insulating sheet 24. Thus, the edge of the other surface 28 of the insulating sheet 24 is exposed from the edge of the second electrode sheet 26.

[0061] The first electrode sheet 25 and the second electrode sheet 26 may be of the same shape and size, or may be of similar shape with one being slightly larger than the other.

[0062] In addition, since the second electrode sheet 26 has substantially the same configuration as that of the first electrode sheet 25 , overlapping descriptions may be omitted in the following description.

[0063] The insulator sheet 24 is formed to contain an elastomer as a main component, for example. Therefore, the insulator sheet 24 is soft. In other words, the insulator sheet 24 is configured to have flexibility and be able to stretch in the plane direction. The insulator sheet 24 contains, for example, a thermoplastic material, and in particular, a thermoplastic elastomer as a main component. The insulator sheet 24 may be formed of the thermoplastic elastomer itself, or may be formed of an elastomer cross-linked by heating the thermoplastic elastomer as a raw material as a main component.

[0064] In addition, the insulator sheet 24 may include rubber, resin, foamed resin, other materials other than thermoplastic elastomers, etc. For example, when the insulator sheet 24 includes rubber such as ethylene-propylene rubber (EPM, EPDM), the flexibility of the insulator sheet 24 is improved. From the viewpoint of improving the flexibility of the insulator sheet 24, the insulator sheet 24 may contain a flexibility-imparting component such as a plasticizer. Furthermore, the insulator sheet 24 may be configured to include a reaction-curable elastomer or a thermosetting elastomer as a main component.

[0065] Furthermore, the insulator sheet 24 is preferably a material with good thermal conductivity. Therefore, the insulator sheet 24 may be made of a thermoplastic elastomer with high thermal conductivity, or may contain a filler capable of improving thermal conductivity. In addition, the insulator sheet 24 may be configured to have a foam structure with a fine air layer. Furthermore, the insulator sheet 24 may be configured to have perforations (regular physical holes represented by eyelets) and slits (cuts, incisions).

[0066] The first electrode sheet 25 is disposed on one surface 27 of the insulator sheet 24, that is, on the upper surface ( Figure 4 The second electrode sheet 26 is arranged on the other side 28 of the insulator sheet 24, that is, the lower surface ( Figure 4 At least the first electrode sheet 25 constitutes a detection electrode. The first electrode sheet 25 and the second electrode sheet 26 are conductive. Furthermore, the first electrode sheet 25 and the second electrode sheet 26 are soft. In other words, the first electrode sheet 25 and the second electrode sheet 26 are configured to be flexible and extendable in the surface direction.

[0067] like Figure 4 As shown in FIG. 1 , the first auxiliary member 50 is disposed on the first surface 29a of the first electrode sheet 25 which is located on the side opposite to the insulator sheet 24. Figure 3 As shown, the first auxiliary member 50 is disposed at a position where the first neck portion 25 b and the second neck portion 25 e of the first electrode sheet 25 overlap.

[0068] like Figure 3 As shown, the first auxiliary member 50 fixed to the first neck portion 25b is arranged in a region including at least a portion of the first neck portion 25b in the main body portion 25a of the first electrode sheet 25. The first auxiliary member 50 fixed to the first neck portion 25b is arranged across the first neck portion 25b and the wide portion 25c in the long side direction X. However, the first auxiliary member 50 may be arranged to overlap only in the region of the first neck portion 25b.

[0069] The first auxiliary member 50 fixed to the second neck portion 25e is arranged in a region including at least a portion of the second neck portion 25e in the main body portion 25a of the first electrode sheet 25. The first auxiliary member 50 fixed to the second neck portion 25e is arranged across the second neck portion 25e and the wide portion 25c in the cross direction Y, and is arranged across the second neck portion 25e and the terminal portion 25f. However, the first auxiliary member 50 may be arranged to overlap only in the region of the second neck portion 25e.

[0070] 5. Configuration of the First Electrode Sheet 25

[0071] Reference Figure 4-5 , the structure of the first electrode sheet 25 is described. Figure 5 As shown in (a) of FIG. 1 , the first electrode sheet 25 is formed of a first conductive cloth 41 having conductivity. The first electrode sheet 25 has conductivity and flexibility. The first electrode sheet 25 has stretchability in the longitudinal direction X and the cross direction Y. The first electrode sheet 25 has a plurality of first woven yarns 42 having conductivity.

[0072] The first conductive cloth 41 has a first plated layer 44 made of a conductive metal on the surface of a woven fabric formed by weaving a plurality of first fibers 43 made of resin. The first woven yarn 42 is formed by forming the first plated layer 44 on the surface of the first fibers 43. However, the entire surface of the plurality of first woven yarns 42 may not be covered with the first plated layer 44.

[0073] The manufacturing method of the first electrode sheet 25 is not particularly limited. For example, the conductive material may be covered on a cloth formed by weaving the first fibers 43 made of resin, or the first woven yarn 42 may be woven by weaving the first fibers 43 after the conductive material is covered on the surface. The first electrode sheet 25 of this embodiment is manufactured by forming the first plated layer 44 made of the conductive material on the cloth formed by weaving the first fibers 43 made of resin.

[0074] Examples of the resin constituting the first woven yarn 42 include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyamides such as nylon 6 and nylon 6, 6. However, the resin constituting the first woven yarn 42 is not limited to the above, and any resin can be appropriately selected.

[0075] As the metal plated on the first woven wire 42, any metal or alloy such as copper, nickel, tin, solder, etc. can be appropriately selected. The first plating layer 44 formed on the surface of the first fiber 43 can be composed of one metal species, and can also be composed of multiple metal species. For example, only copper can be plated on the surface of the first fiber 43, and only nickel can be plated on the surface of the first fiber 43, and a copper plating layer composed of copper can be formed on the surface of the first fiber 43, and a nickel plating layer composed of nickel can be formed on the surface of the copper plating layer. The first plating layer 44 formed on the surface of the first fiber 43 can be formed by electrolytic plating, and can also be formed by electroless plating.

[0076] like Figure 5 As shown in (a) of FIG. 1 , the first electrode sheet 25 of this embodiment is formed by weaving a plurality of first woven yarns 42. The first electrode sheet 25 includes openings 34 which are gaps between the plurality of first woven yarns 42.

[0077] like Figure 5 As shown in (a) in FIG. 1 , each first woven yarn 42 is formed by one first fiber 43. However, each first woven yarn 42 may be formed by an untwisted yarn bundle in which a plurality of first fibers 43 are bundled without being twisted, or may be formed by a twisted yarn in which a plurality of first fibers 43 are twisted.

[0078] like Figure 5 As shown in (a) in FIG. 1 , the orientation direction of the first woven wire 42 intersects with the long side direction X of the first electrode sheet. The orientation direction of the first woven wire 42 is set to an acute angle of substantially 45° relative to the long side direction X of the first electrode sheet 25. Substantially 45° means, for example, an acute angle of 35 to 55° is set relative to the long side direction X of the first electrode sheet 25.

[0079] However, the orientation direction of the first woven yarns 42 may be an angle different from the acute angle of substantially 45° with respect to the longitudinal direction X of the first electrode sheet 25 .

[0080] like Figure 5 As shown in (a) in the figure, the intervals between adjacent first woven yarns 42 are substantially equidistant. However, substantially equidistant means including the case of equidistant, and even in the case of not equidistant, it also includes the case that can be identified as substantially equidistant. However, the intervals between adjacent first woven yarns 42 may be different.

[0081] like Figure 4As shown, at least a portion of the first electrode sheet 25 is buried on the side of the surface 27 of one side of the insulator sheet 24. Only a portion of the first electrode sheet 25 may be buried in the insulator sheet 24, or the entire first electrode sheet 25 may be buried in the insulator sheet 24. In addition, the first electrode sheet 25 may not be buried in the insulator sheet 24, but may be bonded to the insulator sheet 24 using a known bonding means such as an adhesive or a bonding agent.

[0082] Part of the insulator sheet 24 exists inside the opening 34 of the first electrode sheet 25 as a welding material for welding the first electrode sheet 25 and the insulator sheet 24. The opening 34 of the first electrode sheet 25 is filled with part of the insulator sheet 24.

[0083] 6. First auxiliary member 50

[0084] Reference Figure 4 , Figure 6 to Figure 8 , the first auxiliary member 50 is described. Figure 4 As shown, the first auxiliary member 50 involved in this embodiment includes a conductive first conductive material 50a. The first auxiliary member 50 is arranged on one surface 27 of the first electrode sheet 25. The first auxiliary member 50 is arranged in a state where the first conductive cloth 41 and the first conductive material 50a are electrically connected. The first auxiliary member 50 forms an electrical conduction path at a portion where the first plating layer 44 of the first conductive cloth 41 is broken. The first conductive material 50a may also be made of a metal that includes the same metal as the metal constituting the first plating layer 44 formed on the first conductive cloth 41.

[0085] The first conductive material 50a of the first auxiliary member 50 is a laminated body including a conductor layer 50b of a conductor and a conductive adhesive layer or a conductive adhesive layer 50d (an example of a conductive adhesive). The conductive adhesive layer includes a conductive filler and a curable resin. The conductive adhesive layer 50d includes a conductive filler and a binder resin (an example of an adhesive). The conductor layer 50b is electrically connected to the conductive adhesive layer, and the conductor layer 50b is electrically connected to the conductive adhesive layer 50d. In this embodiment, the conductive adhesive layer 50d is used.

[0086] As the conductive filler, any metal having conductivity, such as silver or silver alloy, copper or copper alloy, gold or gold alloy, can be selected. In addition, as the conductive filler, conductive carbon or graphite can also be included. As the graphite, any graphite, such as natural graphite, acetylene black, Ketjen black, etc. can be selected. The shape of the conductive filler can be any shape, such as spherical, flake, foil, etc.

[0087] As the curable resin, any curable resin such as moisture curable resin, oxygen curable resin, two-component curable resin, etc. can be adopted. As the binder resin, any resin such as acrylic adhesive, silicone adhesive, urethane adhesive, rubber adhesive, etc. can be appropriately selected.

[0088] The conductor layer 50b of this embodiment is composed of the third conductive cloth 51. Figure 6 As shown, the third conductive cloth 51 has a third plated layer 54 made of metal on the surface. The third conductive cloth 51 is conductive and flexible. The third conductive cloth 51 is stretchable in the longitudinal direction X and the cross direction Y. The third conductive cloth 51 has a plurality of third woven yarns 52 that are conductive.

[0089] The third conductive cloth 51 has a third plating layer 54 made of a conductive metal on the surface of a woven fabric formed by weaving a plurality of third fibers 53 made of resin. The third plating layer 54 is formed on the surface of the third fibers 53 to form a plurality of third woven wires 52. However, the entire surface of the plurality of third woven wires 52 may not be covered by the third plating layer 54. The third plating layer 54 is electrically connected to the conductive adhesive layer, and the third plating layer 54 is electrically connected to the conductive adhesive layer 50d.

[0090] The manufacturing method of the third conductive cloth 51 is not particularly limited, and for example, the conductive material may be covered on a cloth formed by weaving the third fibers 53 made of resin, or the third woven yarn 52 covered with the conductive material on the surface of the third fibers 53 may be weaved. The third conductive cloth 51 of this embodiment is manufactured by forming a third plated layer 54 made of a conductive material on the cloth formed by weaving the third fibers 53 made of resin.

[0091] Examples of the resin constituting the third woven yarn 52 include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyamides such as nylon 6 and nylon 6, 6. However, the resin constituting the first woven yarn 42 is not limited to the above, and any resin can be appropriately selected.

[0092] As the metal plated on the third woven wire 52, any metal or alloy such as copper, nickel, tin, solder, etc. can be appropriately selected. The third plating layer 54 formed on the surface of the first fiber 43 can be composed of one metal species, and can also be composed of multiple metal species. For example, copper can be plated only on the surface of the third fiber 53, and nickel can be plated only on the surface of the third fiber 53, and a copper plating layer composed of copper can be formed on the surface of the third fiber 53, and a nickel plating layer composed of nickel can also be formed on the surface of the copper plating layer. The third plating layer 54 formed on the surface of the third fiber 53 can be formed by electrolytic plating, and can also be formed by electroless plating.

[0093] like Figure 6 As shown in FIG. 1 , the third conductive cloth 51 of this embodiment includes a plurality of third woven yarns 52. Each third woven yarn 52 of this embodiment is composed of an untwisted yarn bundle in which a plurality of third fibers 53 are bundled without being twisted. However, the third woven yarn 52 may be composed of a single third fiber 53, similarly to the first woven yarn 42 described above. Figure 7 As shown, it can also be composed of a twisted yarn in which a plurality of third fibers 53 are twisted.

[0094] like Figure 6 As shown, the orientation direction of the third woven wire 52 intersects with the long side direction X of the first electrode sheet 25. The orientation direction of the third woven wire 52 is set to an acute angle of substantially 45° relative to the long side direction X of the first electrode sheet 25. Substantially 45° means that, for example, the acute angle relative to the long side direction X of the first electrode sheet 25 is set to 35 to 55°.

[0095] However, the alignment direction of the third woven yarns 52 may be an angle different from the acute angle of substantially 45° with respect to the longitudinal direction X of the first electrode sheet 25 .

[0096] like Figure 8 As shown, at least a portion of the third conductive cloth 51 is buried in the conductive adhesive layer 50d. Only a portion of the third conductive cloth 51 may be buried in the conductive adhesive layer 50d, or the entire third conductive cloth 51 may be buried in the conductive adhesive layer 50d. In addition, the third conductive cloth 51 may not be buried in the conductive adhesive layer 50d, but may be bonded to the conductive adhesive layer 50d and laminated.

[0097] like Figure 8 As shown in the figure, in a state where the first auxiliary member 50 is fixed to the first electrode sheet 25, a part of the first conductive cloth 41 is embedded in one surface 27 of the insulator sheet 24. In addition, the conductive adhesive layer 50d of the first auxiliary member 50 is arranged to fill the opening 34 of the first conductive cloth 41. Furthermore, a part of the third fiber 53 of the third conductive cloth 51 constituting the first auxiliary member 50 is arranged to enter the opening 34 of the first conductive cloth 41.

[0098] like Figure 8 As shown, the diameter of the third fibers 53 constituting the third conductive cloth 51 is formed to be smaller than the diameter of the first fibers 43 constituting the first conductive cloth 41. However, the diameter of the third fibers 53 constituting the third conductive cloth 51 may be formed to be larger than the diameter of the first fibers 43 constituting the first conductive cloth 41, or the diameter of the first fibers 43 and the diameter of the third fibers 53 may be formed to be the same.

[0099] like Figure 8As shown, the first fibers 43 of the first conductive cloth 41 are in contact with the conductive adhesive layer 50d of the first auxiliary member 50. Thus, the first plated layer 44 of the first conductive cloth 41 and the conductive adhesive layer 50d of the first auxiliary member 50 are electrically connected.

[0100] Furthermore, the first fibers 43 of the first conductive cloth 41 are in contact with the third fibers 53 of the third conductive cloth 51. Thus, the first plated layer 44 of the first conductive cloth 41 and the third plated layer 54 of the third conductive cloth 51 are electrically connected.

[0101] like Figure 4 As shown, in this embodiment, the thickness of the first auxiliary member 50 is smaller than the thickness of the first electrode sheet 25 .

[0102] In this embodiment, the elastic modulus of the first auxiliary member 50 in the longitudinal direction X is larger than the elastic modulus of the first electrode sheet 25 in the longitudinal direction X.

[0103] In this embodiment, the bending strength of the first auxiliary member 50 when the first auxiliary member 50 is bent by setting the direction within the plane of the first auxiliary member 50 that intersects the long side direction X as a fold line is greater than the bending strength of the first electrode sheet 25 when the first electrode sheet 25 is bent by setting the direction within the plane of the first electrode sheet 25 that intersects the long side direction X as a fold line.

[0104] In this embodiment, the first electrode sheet is formed into a strip in the longitudinal direction X, and the resistivity of the first auxiliary member 50 in the longitudinal direction X is set to be the same as or lower than the resistivity of the first electrode sheet in the longitudinal direction X.

[0105] 7. Conductive Path of the First Electrode Sheet 25 and the First Auxiliary Component 50

[0106] Reference Figure 5 , Figure 9-10 , the conductive path of the first electrode sheet 25 and the first auxiliary member 50 is described. Figure 5 As shown in (a) in FIG. 1 , the first conductive cloth 41 has a plurality of intersections A, B, and C where the first woven yarns 42 intersect with each other. Figure 5 (a) in FIG. 1 illustrates three intersections A, B, and C. For example, conduction paths a, b, and c indicated by arrow lines a, b, and c are illustrated as conduction paths passing through the three intersections A, B, and C.

[0107] Here, when an external force is applied to the first conductive cloth 41, the load is likely to concentrate on the intersections A, B, and C where the plurality of first woven yarns 42 intersect each other. Therefore, there is a tendency that the first plating layer 44 is likely to break at the intersections A, B, and C. However, for the intersections not marked with reference numerals, the first plating layer 44 tends to break easily as described above.

[0108] For example, Figure 5 As shown in (b) of FIG. 1 , it is assumed that the first plating layer 44 at the intersections B and C is broken, and the first fiber 43 is exposed. Figure 5 In (a), the conduction paths b and c indicated by arrow lines b and c are disconnected. As a result, Figure 5 In (b), the conductive path a indicated by the arrow line a is left. This means that the three conductive paths A, B, and C are reduced to one conductive path a. In other words, the conductor area is reduced only by the amount of conductive paths b and c. As a result, there is a concern that the resistance value of the first conductive cloth 41 will decrease.

[0109] like Fig. 9 As shown in the present embodiment, the third conductive cloth 51 and the conductive adhesive layer 50d are stacked on the first conductive cloth 41 constituting the first electrode sheet 25. Thus, a portion of the first conductive cloth 41 is formed so that even if Fig. 9 The conductive path of the portion indicated by the "×" mark is disconnected, but the conductive path is formed by the conductive adhesive layer 50d or the third conductive cloth 51. This will be described in detail below.

[0110] like Fig. 9 As shown, in the first conductive cloth 41, the conduction path is disconnected between the conduction path L1 indicated by the arrow line L1 and the conduction path L2 indicated by the arrow line L2. Therefore, if the first auxiliary member 50 is not provided, the resistance value of the first electrode sheet 25 may increase.

[0111] In this embodiment, the first conductive cloth 41 is electrically connected to the conductive adhesive layer 50d of the first auxiliary member 50, so as shown by the arrow lines M1 and M3, conductive paths M1 and M3 are formed between the first conductive cloth 41 and the conductive adhesive layer 50d. In addition, as shown by the arrow line M2, a conductive path M2 is formed in the conductive adhesive layer 50d. Therefore, in this embodiment, the current flows through the conductive paths L1, M1, M2, M3, and L2. As a result, the resistance value of the first electrode sheet 25 is suppressed from increasing.

[0112] In addition, in this embodiment, the conductive adhesive layer 50d is electrically connected to the third conductive cloth 51. As a result, as shown by arrow lines N1 and N3, conductive paths N1 and N3 are formed between the conductive adhesive layer 50d and the third conductive cloth 51. In addition, as shown by arrow line N2, a conductive path N2 is formed in the layer of the third conductive cloth 51. As a result, in this embodiment, current flows through the conductive paths L1, M1, N1, N2, N3, M3, and L2. As a result, the resistance value of the first electrode sheet 25 is suppressed from increasing.

[0113] Fig.10Schematic diagram showing the orientation direction of the first woven yarn 42 of the first conductive cloth 41 and the orientation direction of the third woven yarn 52 of the third conductive cloth 51. In this embodiment, the first woven yarn 42 of the first conductive cloth 41 and the third woven yarn 52 of the third conductive cloth 51 are oriented in the same direction. The same direction means that the orientation direction of the first woven yarn 42 of the first conductive cloth 41 and the orientation direction of the third woven yarn 52 of the third conductive cloth 51 are the same, and even if they are different, they can be regarded as substantially the same.

[0114] In addition, the metal constituting the third plating layer 54 of the third conductive cloth 51 is the same as the metal constituting the first plating layer 44 of the first conductive cloth 41. The same means that the metal constituting the third plating layer 54 of the third conductive cloth 51 is the same as the metal constituting the first plating layer 44 of the first conductive cloth 41, and even if they are different, it can be recognized that the difference in composition is substantially the same.

[0115] Even in the case where the metal constituting the third plating layer 54 of the third conductive cloth 51 is different from the metal constituting the first plating layer 44 of the first conductive cloth 41, the ionization tendency of the metal constituting the third plating layer 54 of the third conductive cloth 51 and the metal constituting the first plating layer 44 of the first conductive cloth 41 may be the same or substantially the same.

[0116] 8. Second electrode sheet 26

[0117] like Figure 4 As shown, at least a portion of the second electrode sheet 26 is buried on the other side 28 of the insulator sheet 24. Only a portion of the second electrode sheet 26 may be buried in the insulator sheet 24, or the entire second electrode sheet 26 may be buried in the insulator sheet 24. In addition, the second electrode sheet 26 may not be buried in the insulator sheet 24, but may be bonded to the insulator sheet 24 using a known bonding means such as an adhesive or a bonding agent.

[0118] The structure of the second electrode sheet 26 is substantially the same as the first electrode sheet 25 except that the first electrode sheet 25 is replaced by the second electrode sheet 26, the first conductive cloth 41 is replaced by the fourth conductive cloth 71, and the first plating layer 44 is replaced by the fourth plating layer 74 in the description related to the first electrode sheet 25, so repeated descriptions are omitted.

[0119] 9. Third auxiliary member 80

[0120] like Figure 4As shown, a third auxiliary member 80 is arranged on the surface of the second electrode sheet 26 on the side opposite to the insulator sheet 24. The third auxiliary member 80 includes a conductive second conductive material 80a. The second conductive material 80a is electrically connected to the fourth conductive cloth 71. The third auxiliary member 80 forms an electrical conduction path at a portion where the fourth plating layer 74 of the fourth conductive cloth 71 is broken.

[0121] The third auxiliary member 80 includes a fifth conductive cloth 81. The fifth conductive cloth 81 has a fifth plated layer 84 made of metal on the surface. The fifth conductive cloth 81 is made of the same material as the fourth conductive cloth 71.

[0122] In the description related to the structure of the first auxiliary component 50, the structure of the third auxiliary component 80 is substantially the same as the first auxiliary component 50, wherein the first auxiliary component 50 is replaced by the third auxiliary component 80, the third conductive cloth 51 is replaced by the fifth conductive cloth 81, and the third plating layer 54 is replaced by the fifth plating layer 84, and therefore repeated descriptions are omitted.

[0123] The third auxiliary member 80 is arranged at a position overlapping at least a portion of the first auxiliary member 50 in the stacking direction Z in which the third auxiliary member 80 is stacked on the second electrode sheet 26. In this embodiment, the third auxiliary member 80 and the first auxiliary member 50 are arranged at a position overlapping in the stacking direction Z.

[0124] 10. Effects of this method

[0125] Next, the effects of this method are described. The sensor sheet 18 involved in this method includes an insulating insulator sheet 24, a first electrode sheet 25, and a first auxiliary member 50. The first electrode sheet 25 is formed by a first conductive cloth 41 having a first plating layer 44 composed of metal on the surface. The first electrode sheet 25 is arranged on a surface 27 of one side of the insulating sheet 24. The first auxiliary member 50 includes a conductive first conductive material 50a. The first auxiliary member 50 is arranged on a surface of one side of the first electrode sheet 25 in a state where the first conductive cloth 41 and the first conductive material 50a are electrically connected, forming an electrical conduction path at the part where the first plating layer 44 is broken.

[0126] According to this embodiment, even if the first plated layer 44 formed by the first conductive cloth 41 constituting the first electrode sheet 25 is broken, an electrical conduction path can be formed by the first conductive material 50a of the first auxiliary member 50, thereby assisting the electrical conduction of the first electrode sheet 25. Thus, an increase in the resistance value of the sensor sheet 18 can be suppressed.

[0127] According to this embodiment, the first electrode sheet 25 includes the openings 34 which are gaps between the plurality of first woven yarns 42 constituting the first conductive cloth 41 , and at least a portion of the first auxiliary member 50 is disposed inside the openings 34 .

[0128] According to this embodiment, since the adhesion between the first electrode sheet 25 and the first auxiliary member 50 is improved, the electrical contact resistance between the first electrode sheet 25 and the first auxiliary member 50 can be reduced. This can suppress the increase in the resistance value of the sensor sheet 18.

[0129] According to this embodiment, the first auxiliary member 50 is disposed on the first surface 29 a of the first electrode sheet 25 that is located on the opposite side to the insulator sheet 24 .

[0130] The first surface 29a of the first electrode sheet 25 is located on the side opposite to the insulator sheet 24 and is therefore exposed to the outside. Therefore, the first surface 29a of the first electrode sheet 25 may be subjected to external force. According to this embodiment, the first surface 29a of the first electrode sheet 25 is protected by the first auxiliary member 50, thereby suppressing the first plating layer 44 formed on the first surface 29a of the first electrode sheet 25 from being broken due to external force. As a result, it is possible to suppress the increase in the resistance value of the sensor sheet 18.

[0131] According to this embodiment, each of the plurality of first woven yarns 42 of the first conductive cloth 41 constituting the first electrode sheet 25 is formed from one first fiber 43 .

[0132] If the first plating layer 44 formed by one first fiber 43 is broken, the conductive path formed by the first fiber 43 is disconnected. In the case where one first woven yarn 42 is formed by one first fiber 43, if the first plating layer 44 formed by one first fiber 43 is broken, the conductive path formed by the first fiber 43 is also disconnected. In this embodiment, in the case where one first woven yarn 42 is formed by one first fiber 43, even if the first plating layer 44 formed by one first fiber 43 is broken, an electrical conductive path is formed through the first conductive cloth 41, so that the resistance value of the sensor sheet 18 can be suppressed from increasing.

[0133] The first electrode sheet 25 of this embodiment includes first neck 25b to second neck 25e which are narrower than other adjacent portions, and wide width portion 25c and terminal portion 25f which are arranged adjacent to the first neck 25b to second neck 25e and wider than the first neck 25b to second neck 25e. The first auxiliary member 50 is arranged in a region of the first electrode sheet 25 including at least a portion of the first neck 25b to second neck 25e.

[0134] The first neck 25b to the second neck 25e are formed to be narrower than other parts, so they are easily deformed by external force. Therefore, the first electrode sheet 25 arranged at the first neck 25b to the second neck 25e also becomes easily deformed. As a result, the first plated layer 44 formed on the first conductive cloth 41 of the first electrode sheet 25 arranged at the first neck 25b to the second neck 25e becomes easier to break than other parts. According to this method, even if the first neck 25b to the second neck 25e are

[0135] Even when the first plating layer 44 of the second neck portion 25 e is broken, a conduction path can be formed through the first auxiliary member 50 , thereby suppressing an increase in the resistance value of the sensor sheet 18 .

[0136] According to this embodiment, the first auxiliary member 50 is arranged across the first neck 25b to the second neck 25e, the wide width portion 25c, and the terminal portion 25f. Stress tends to concentrate at the boundary portion between the first neck 25b to the second neck 25e, which is easy to deform, and the wide width portion 25c and the terminal portion 25f, which are difficult to deform compared to the neck. Therefore, the first plating layer 44 tends to break at the boundary portion between the first neck 25b to the second neck 25e, the wide width portion 25c, and the terminal portion 25f in the first electrode sheet 25. According to this embodiment, the first auxiliary member 50 is arranged across the first neck 25b to the second neck 25e, the wide width portion 25c, and the terminal portion 25f, so even if the first plating layer 44 breaks at the boundary portion between the first neck 25b to the second neck 25e, the wide width portion 25c, and the terminal portion 25f, a conductive path can be formed. As a result, it is possible to suppress the increase in the resistance value of the sensor sheet 18.

[0137] The first electrode sheet 25 according to the present embodiment includes a main body portion 25 a that is elongated in the longitudinal direction X. The first neck portion 25 b is formed to be narrow in a direction intersecting the longitudinal direction X in the main body portion 25 a.

[0138] In the first neck portion 25 b , even if the first plating layer 44 of the first electrode sheet 25 is broken, a conduction path is formed by the first auxiliary member 50 , thereby suppressing a decrease in the resistance value of the first electrode sheet 25 .

[0139] The first electrode sheet 25 involved in this embodiment includes a main body 25a formed into a strip in the long side direction X, and an extension 25d extending from the main body 25a in a direction intersecting the long side direction X. A terminal 25f connected to an external circuit is formed at a position close to the front end of the extension 25d. The second neck 25e is formed between the main body 25a and the terminal 25f in the extension 25d.

[0140] For example, an external force is sometimes applied to the terminal portion 25f during the operation of connecting the terminal portion 25f to an external circuit or laying the electric wire 32 involved in the external circuit. The external force applied to the terminal portion 25f is likely to be concentrated on the second neck portion 25e. If the stress is concentrated on the second neck portion 25e, there is a risk that the first plating layer 44 disposed on the second neck portion 25e will break. According to this embodiment, even if the first plating layer 44 of the second neck portion 25e breaks, a conductive path is formed by the first auxiliary member 50, so that the resistance value of the sensor sheet 18 can be suppressed from increasing.

[0141] According to this embodiment, the insulator sheet 24 is formed of an elastic body, and at least a portion of the first electrode sheet 25 and at least a portion of the first auxiliary member 50 are buried in the elastic body. This can improve the fixing strength of the insulator sheet 24 and the first electrode sheet 25.

[0142] The first conductive material 50a of the first auxiliary member 50 according to the present embodiment may be formed of the same metal as the metal of the first plated layer 44 formed on the first conductive cloth 41 constituting the first electrode sheet 25. In this case, it is possible to suppress the occurrence of galvanic corrosion between the metal of the first plated layer 44 of the first conductive cloth 41 constituting the first electrode sheet 25 and the metal contained in the first conductive material 50a of the first auxiliary member 50.

[0143] The first conductive material 50a of the first auxiliary member 50 of the present embodiment may be made of conductive carbon or graphite. In this case, the first conductive material 50a of the first auxiliary member 50 does not contain metal, so that the occurrence of electrical corrosion in the first conductive material 50a of the first auxiliary member 50 can be suppressed.

[0144] The first conductive material 50a of the first auxiliary member 50 involved in this embodiment is a laminate of a conductive layer 50b including a conductor, and a conductive adhesive layer including a conductive filler and a curable resin, or a conductive adhesive layer 50d including a conductive filler and a binder resin. According to this embodiment, an electrical conduction path can be formed at the part where the first plating layer 44 is broken through the conductive layer 50b or the conductive adhesive layer 50d. Thus, even if either the conductive layer 50b or the conductive adhesive layer 50d is electrically cut off, the resistance value of the first electrode sheet 25 can be suppressed from increasing.

[0145] The conductor layer 50b of the first conductive material 50a according to this embodiment is formed by a third conductive cloth 51 having a third plating layer 54 made of metal on the surface. The metal constituting the third plating layer 54 of the third conductive cloth 51 is the same as the metal constituting the first plating layer 44 of the first conductive cloth 41. Thus, it is possible to suppress the occurrence of electrical corrosion between the first plating layer 44 of the first conductive cloth 41 and the third plating layer 54 of the third conductive cloth.

[0146] The third woven yarn 52 constituting the third conductive cloth 51 involved in this embodiment is a twisted yarn in which a plurality of third fibers 53 are twisted, or an untwisted yarn bundled in a state where a plurality of third fibers 53 are not twisted. Thus, even if any one of the plurality of third fibers 53 is electrically cut off, a conductive path is formed through the other third fibers 53, so that an increase in the resistance value of the first electrode sheet 25 can be suppressed.

[0147] According to this embodiment, the first woven yarn 42 constituting the first conductive cloth 41 is formed of the first fiber 43, and the third woven yarn 52 constituting the third conductive cloth 51 is formed of the third fiber 53, and the diameter of the third fiber 53 is smaller than the diameter of the first fiber 43. According to this embodiment, the diameter of the third fiber 53 is smaller than the diameter of the first fiber 43, so the flexibility of the third conductive cloth 51 formed by the third fiber 53 is higher than the flexibility of the first conductive cloth 41. Therefore, the third conductive cloth 51 is flexibly deformed along the shape of the first conductive cloth 41, thereby improving the close contact between the first conductive cloth 41 and the third conductive cloth 51. Therefore, a backup conduction path for the first conductive cloth 41 can be reliably formed by the third conductive cloth 51, so that the increase in the resistance value of the sensor sheet 18 can be suppressed.

[0148] According to this embodiment, the woven yarns of the first conductive cloth 41 constituting the first electrode sheet 25 and the woven yarns of the third conductive cloth 51 constituting the first auxiliary member 50 are aligned in the same direction.

[0149] The conduction path of the first conductive cloth 41 is formed along the first woven wire 42 constituting the first conductive cloth 41. In addition, the conduction path of the third conductive cloth 51 is formed along the third woven wire 52 constituting the third conductive cloth 51. In this embodiment, the third woven wire 52 is oriented in the same direction as the first woven wire 42, so the conduction path of the third conductive cloth 51 is formed along the conduction path of the first conductive cloth 41. That is, in the sensor sheet 18 of this embodiment, a spare conduction path based on the third conductive cloth 51 is formed along each conduction path of the first conductive cloth 41. Therefore, in the case where the first plated layer 44 of the first woven wire 42 of the first conductive cloth 41 is broken, a conduction path along the woven wire of the first conductive cloth 41 from which the first plated layer 44 has been peeled can be formed by the third woven wire 52 of the third conductive cloth 51, so that the increase in the resistance value of the sensor sheet 18 can be suppressed.

[0150] The thickness dimension of the first auxiliary member 50 involved in this embodiment is smaller than the thickness dimension of the first electrode sheet 25. As a result, the first auxiliary member 50 becomes easy to deform corresponding to the shape of the first electrode sheet 25. As a result, the close contact between the first auxiliary member 50 and the first electrode sheet 25 is improved, so that even if the first plating layer 44 of the first electrode sheet 25 is broken, a conductive path can be reliably formed through the first auxiliary member 50.

[0151] The first electrode sheet 25 involved in this embodiment is formed into a long strip in the longitudinal direction X, and the elastic coefficient of the first auxiliary member 50 in the longitudinal direction X is greater than the elastic coefficient of the first electrode sheet 25 in the longitudinal direction X. According to this embodiment, the first auxiliary member 50 can reinforce the first electrode sheet 25. Thus, it is possible to prevent the first electrode sheet 25 from being damaged by external force.

[0152] According to this embodiment, the first electrode sheet 25 is formed into a strip in the long side direction X, and the bending strength of the first auxiliary member 50 when the first auxiliary member 50 is bent by setting the direction in the plane of the first auxiliary member 50 that intersects the long side direction X as a fold line is greater than the bending strength of the first electrode sheet 25 when the first electrode sheet 25 is bent by setting the direction in the plane of the first electrode sheet 25 that intersects the long side direction X as a fold line. According to this embodiment, the first electrode sheet 25 can be reinforced by the first auxiliary member 50. Thus, the first electrode sheet 25 can be prevented from being damaged by external force.

[0153] The first electrode sheet 25 involved in this embodiment is formed into a long strip in the long side direction X, and the resistivity of the first auxiliary member 50 in the long side direction X is the same as or lower than the resistivity of the first electrode sheet 25 in the long side direction X. According to this embodiment, the resistivity of the conductive path formed by the first auxiliary member 50 can be the same as or lower than the resistivity of the first electrode sheet 25, so that the resistance value of the sensor sheet 18 can be suppressed from increasing.

[0154] The sensor sheet 18 involved in this embodiment includes a second electrode sheet 26 and a third auxiliary member 80. The second electrode sheet 26 is formed of a fourth conductive cloth 71 having a fourth plated layer 74 made of metal on the surface and is arranged on the other side of the insulator sheet 24. The third auxiliary member 80 includes a conductive second conductive material 80a and is arranged on one side of the second electrode sheet 26 in a state where the fourth conductive cloth 71 and the second conductive material 80a are electrically connected, forming an electrical conduction path at a portion where the fourth plated layer 74 is broken. According to this embodiment, for example, the second electrode sheet 26 can also be used as a sensor electrode or a shielding electrode paired with the first electrode sheet 25, and can also be used as a heater, so that the function of the sensor sheet 18 can be improved.

[0155] According to this embodiment, in the stacking direction Z in which the third auxiliary member 80 is stacked on the second electrode sheet 26, the third auxiliary member 80 is arranged at a position overlapping with at least a portion of the first auxiliary member 50. In the portion where the sensor sheet 18 is greatly bent or where a large force is applied to the sensor sheet 18, a portion where the third auxiliary member 80 overlaps with the first auxiliary member 50 is formed, thereby forming an electrical conduction path in the portion where the first plating layer 44 of the first electrode sheet 25 or the fourth plating layer 74 of the second electrode sheet 26 is broken.

[0156] The third auxiliary member 80 according to this embodiment includes a fifth conductive cloth 81 having a fifth plated layer 84 made of metal on its surface. The fifth conductive cloth 81 can form an electrical conduction path in the broken portion of the fourth plated layer 74 of the second electrode sheet 26 .

[0157] The fifth conductive cloth 81 according to this embodiment is formed of the same material as the fourth conductive cloth 71. According to this embodiment, the fifth conductive cloth 81 and the fourth conductive cloth 71 can be formed of the same material, so that the manufacturing cost of the sensor sheet 18 can be reduced. In addition, the occurrence of electrical corrosion between the fifth plated layer 84 of the fifth conductive cloth 81 and the fourth plated layer 74 of the fourth conductive cloth 71 can be suppressed.

[0158] (Implementation Method 2)

[0159] Next, refer to Fig.11Embodiment 2 is described. The first auxiliary member 50 involved in this embodiment is composed of a plurality of first splitting auxiliary members 150 arranged at intervals. The plurality of first splitting auxiliary members 150 may be arranged in any direction, for example, they may be arranged at intervals in the longitudinal direction X or at intervals in the intersecting direction Y.

[0160] The third auxiliary member 80 according to this embodiment is composed of a plurality of spaced-apart third splitting auxiliary members 180. The plurality of third splitting auxiliary members 180 may be arranged in any direction, for example, spaced-apart in the longitudinal direction X or spaced-apart in the intersecting direction Y.

[0161] The third auxiliary member 80 of this embodiment is arranged at a position that does not overlap with the first auxiliary member 50 in the stacking direction Z.

[0162] In addition, among the reference numerals used in Embodiment 2 and thereafter, the same reference numerals as those used in the existing embodiments represent the same components as those in the existing embodiments unless otherwise indicated.

[0163] Next, the effects of this method are described. The first auxiliary member 50 involved in this method is a plurality of first split auxiliary members 150 arranged at intervals. Thus, a conductive path can be formed for a portion where the first electrode sheet 25 is locally bent to a large extent or a portion where a large force is applied to the first electrode sheet 25 locally.

[0164] According to this embodiment, the third auxiliary member 80 is disposed at a position not overlapping the first auxiliary member 50 in the lamination direction Z in which the third auxiliary member 80 is laminated on the second electrode sheet 26. This can suppress an increase in the resistance value of the sensor sheet 18 without losing the flexibility of the sensor sheet 18.

[0165] (Implementation 3)

[0166] Next, refer to Fig.12 Embodiment 3 will be described. The first auxiliary member 50 according to this embodiment is disposed on the second surface 29 b of the first electrode sheet 25 that is located on the insulating sheet 24 side.

[0167] Furthermore, the third auxiliary member 80 according to the present embodiment is disposed on the surface of the second electrode sheet 26 on the insulating sheet 24 side.

[0168] The first auxiliary member 50 is disposed between the first electrode sheet 25 and the insulator sheet 24, and is therefore less likely to be damaged by external force. Therefore, when the first plating layer 44 of the first electrode sheet 25 is broken by external force, a conductive path can be formed through the first auxiliary member 50. Thus, an increase in the resistance value of the sensor sheet 18 can be suppressed.

[0169] (Implementation 4)

[0170] Next, refer to Figure 13-14 Embodiment 4 is described. The first auxiliary member 50 according to this embodiment includes a second conductive cloth 61. The second conductive cloth 61 has a second plated layer 64 made of metal on the surface. The second conductive cloth 61 is arranged on the second surface 29b of the first electrode sheet 25. However, the second conductive cloth 61 may also be arranged on the first surface 29a of the first electrode sheet 25.

[0171] like Fig.14 As shown, the second conductive cloth 61 includes a plurality of second woven yarns 62. The second conductive cloth 61 according to this embodiment is made of the same material as the first conductive cloth 41. However, the second conductive cloth 61 and the first conductive cloth 41 may be made of different materials.

[0172] The metal constituting the second plating layer 64 formed on the second conductive cloth 61 of the present embodiment is the same as the metal constituting the first plating layer 44 formed on the first electrode sheet 25 .

[0173] In implementation mode 1 Figure 8 In the description of the first auxiliary member 50 described above, the second conductive cloth 61 according to the present embodiment is substantially the same as the first auxiliary member 50 except that the third conductive cloth 51 is replaced by the second conductive cloth 61, the third woven yarn 52 is replaced by the second woven yarn 62, and the third fiber 53 is replaced by the second fiber 63. Therefore, repeated description is omitted. In addition, the second conductive cloth 61 according to the present embodiment is configured not to include the conductive adhesive layer 50d in the first auxiliary member 50 described in Embodiment 1.

[0174] The elastic body constituting the insulator sheet 24 enters the opening 34 of the first conductive cloth 41 constituting the first electrode sheet 25. At least a part of the first auxiliary member 50 is buried in the elastic body. In detail, the elastic body constituting the insulator sheet 24 enters the gaps between the second woven yarns 62 constituting the second conductive cloth 61, whereby the first electrode sheet 25 and the first auxiliary member 50 are fixed integrally with the insulator sheet 24.

[0175] In addition, in this embodiment, the third auxiliary member 80 is formed of a fifth conductive cloth 81 having a fifth plated layer 84 made of metal on the surface. The third auxiliary member 80 is arranged on the surface of the second electrode sheet 26 on the side of the insulator sheet 24. However, the third auxiliary member 80 may be arranged on the side of the second electrode sheet 26 opposite to the insulator sheet 24.

[0176] In this embodiment, although details are not shown, the elastic body constituting the insulator sheet 24 enters the opening of the fourth conductive cloth 71 constituting the second electrode sheet 26. At least a portion of the third auxiliary member 80 is embedded in the elastic body. Specifically, the elastic body constituting the insulator sheet 24 enters the gaps between the fifth woven yarns 82 of the fifth conductive cloth 81 constituting the third auxiliary member 80, whereby the second electrode sheet 26 and the third auxiliary member 80 are fixed integrally with the insulator sheet 24.

[0177] The third auxiliary member 80 may be formed on the same surface as the surface of the second electrode sheet 26 on the side opposite to the insulator sheet 24, or may protrude from the surface of the second electrode sheet 26 on the side opposite to the insulator sheet 24. In addition, the third auxiliary member 80 includes a fifth conductive cloth 81. The configuration of the fifth conductive cloth 81 is substantially the same as that of the second conductive cloth 61 described above, and therefore repeated descriptions are omitted.

[0178] The first auxiliary member 50 according to this embodiment is formed of the second conductive cloth 61 having the second plated layer 64 made of metal on the surface. According to this embodiment, the first conductive cloth 41 constituting the first electrode sheet 25 is in contact with the second conductive cloth 61 constituting the first auxiliary member 50, thereby forming a conductive path without intervening the conductive adhesive layer 91, the conductive adhesive 92, etc. Thus, the resistance value of the sensor sheet 18 can be suppressed from increasing.

[0179] The second conductive cloth 61 according to this embodiment is formed of the same material as the first conductive cloth 41. According to this embodiment, the first conductive cloth 41 and the second conductive cloth 61 can be formed of the same material, so that the manufacturing cost of the sensor sheet 18 can be reduced. In addition, the occurrence of electrical corrosion between the first plated layer 44 of the first conductive cloth 41 and the second plated layer 64 of the second conductive cloth 61 can be suppressed.

[0180] In this embodiment, the second woven yarn 62 constituting the second conductive cloth 61 can be a twisted yarn in which a plurality of second fibers 63 are twisted, or an untwisted yarn bundled in a state where a plurality of second fibers 63 are not twisted. According to this embodiment, a conductive path is formed by a plurality of fibers. Therefore, even if the second plating layer 64 is broken in the plurality of fibers constituting the second conductive cloth 61, the possibility of the conductive path remaining is increased. Thus, the increase in the resistance value of the sensor sheet 18 can be suppressed.

[0181] In this embodiment, the first woven yarns 42 constituting the first conductive cloth 41 are composed of the first fibers 43 , and the second woven yarns 62 constituting the second conductive cloth 61 are composed of the second fibers 63 . The diameter of the second fibers 63 may be smaller than that of the first fibers 43 .

[0182] According to this embodiment, the diameter of the second fibers 63 is smaller than the diameter of the first fibers 43, so the flexibility of the second conductive cloth 61 formed by the second fibers 63 is higher than the flexibility of the first conductive cloth 41. Therefore, the second conductive cloth 61 is flexibly deformed along the shape of the first conductive cloth 41, thereby improving the adhesion between the first conductive cloth 41 and the second conductive cloth 61. Therefore, a backup conduction path for the first conductive cloth 41 can be reliably formed by the second conductive cloth 61, so that the increase in the resistance value of the sensor sheet 18 can be suppressed.

[0183] In this embodiment, the second woven yarns 62 of the second conductive cloth 61 constituting the first auxiliary member 50 may be oriented in the same direction as the first woven yarns 42 of the first conductive cloth 41 constituting the first electrode sheet 25 .

[0184] The conductive path of the first conductive cloth 41 is formed along the first woven wire 42 constituting the first conductive cloth 41. In addition, the conductive path of the second conductive cloth 61 is formed along the second woven wire 62 constituting the second conductive cloth 61. In this embodiment, the second woven wire 62 is oriented in the same direction as the first woven wire 42, so the conductive path of the second conductive cloth 61 is formed along the conductive path of the first conductive cloth 41. That is, in the sensor sheet 18 of this embodiment, a spare conductive path based on the second conductive cloth 61 is formed along each conductive path of the first conductive cloth 41. Therefore, in the case where the first plating layer 44 of the woven wire of the first conductive cloth 41 is broken, the conductive path along the woven wire of the first conductive cloth 41 after the first plating layer 44 is peeled off can be formed through the woven wire of the second conductive cloth 61, so that the increase in the resistance value of the sensor sheet 18 can be suppressed.

[0185] (Implementation 5)

[0186] Next, refer to Fig.15 Implementation method 5 is described. Fig.15 (a) in the figure represents a modification example (1) of the fifth embodiment. The first conductive material 50a of the first auxiliary member 50 of this modification example (1) is different from the first embodiment in that it does not have a third conductive cloth 51. That is, the first conductive material 50a of this embodiment is composed only of a conductive adhesive layer 91 containing a conductive filler and a binder resin. In addition, the first conductive material 50a may be a conductive adhesive 92 containing a conductive filler and a curable resin. In addition, the first conductive material 50a may also be a conductive paste 93 containing an electrical filler and a binder resin. The curable resin and the adhesive are the same as those in the first embodiment, so repeated descriptions are omitted. As the binder resin, a known binder resin such as a silicone resin can be appropriately selected.

[0187] like Fig.15As shown in (a) of FIG. 2 , the first auxiliary member 50 of this embodiment is arranged on the first surface 29a of the first electrode sheet 25. In this embodiment, the first auxiliary member 50 is formed by bulging from the first surface 29a of the first electrode sheet 25. However, the first auxiliary member 50 can also be formed on the same surface as the first surface 29a of the first electrode sheet 25. In addition, the first auxiliary member 50 can also be arranged to be stacked with the first surface 29a of the first electrode sheet 25.

[0188] like Fig.15 As shown in (a) in FIG. 1 , the third auxiliary member 80 of this embodiment is arranged on the surface of the second electrode sheet 26 on the side opposite to the insulator sheet 24. In this embodiment, the third auxiliary member 80 is formed by bulging from the surface of the second electrode sheet 26 on the side opposite to the insulator sheet 24. However, the third auxiliary member 80 may be formed on the same surface as the surface of the second electrode sheet 26 on the side opposite to the insulator sheet 24, or by being stacked. The second conductive material 80a constituting the third auxiliary member 80 may be a conductive adhesive layer 91, a conductive adhesive 92, or a conductive paste 93.

[0189] in addition, Fig.15 (b) shows a modification (2) of Embodiment 5. The first auxiliary member 50 of this modification (2) is arranged on the second surface 29 b of the first electrode sheet 25 .

[0190] like Fig.15 As shown in FIG. 2( b ), the third auxiliary member 80 of this embodiment is disposed on the surface of the second electrode sheet 26 on the insulating sheet 24 side.

[0191] The first conductive material 50a of the first auxiliary member 50 of this embodiment may be a conductive adhesive layer 91 containing a conductive filler and a binder resin, a conductive adhesive 92 containing a conductive filler and a curable resin, or a conductive paste 93 containing a conductive filler and a binder resin. Thus, the increase in the resistance value of the sensor sheet 18 can be suppressed without reducing the flexibility of the sensor sheet 18.

[0192] (Implementation method 6)

[0193] Next, refer to Fig.16 Implementation 6 is described. Fig.16 As shown in FIG. 5( a ), the first auxiliary member 50 is disposed on the first surface 29 a of the first electrode sheet 25 according to the modification (1) of the sixth embodiment, and the second auxiliary member 100 is disposed on the second surface 29 b of the first electrode sheet 25 .

[0194] The second auxiliary member 100 includes a second conductive material 80a. The second conductive material 80a is electrically connected to the first conductive cloth 41. The second auxiliary member 100 forms an electrical conduction path at a location where the first plated layer 44 of the first conductive cloth 41 is broken. In the description related to the first auxiliary member 50, the second auxiliary member 100 includes a sixth conductive cloth 101 and a conductive adhesive layer 50d. The second auxiliary member 100 is substantially the same as the first auxiliary member 50 except that the third conductive cloth 51 is replaced by the sixth conductive cloth 101, and therefore repeated descriptions are omitted.

[0195] like Fig.16 As shown in (a) of the figure, the second auxiliary member 100 according to the modification (1) of the sixth embodiment is arranged at a position overlapping with at least a portion of the first auxiliary member 50 in the stacking direction Z in which the first auxiliary member 50 is stacked on the first electrode sheet 25. In this modification (1), the second auxiliary member 100 is arranged at a position overlapping with the first auxiliary member 50 in the stacking direction Z.

[0196] like Fig.16 As shown in (b) of the figure, the first auxiliary member 50 according to the modification (2) of the sixth embodiment is composed of a plurality of first splitting auxiliary members 150 arranged at intervals. In addition, the second auxiliary member 100 according to the modification (2) is composed of a plurality of second splitting auxiliary members 160 arranged at intervals. The first splitting auxiliary members 150 and the second splitting auxiliary members 160 are arranged at positions that do not overlap in the stacking direction Z.

[0197] like Fig.16 As shown in (c) in the figure, the first auxiliary member 50 involved in the modification example (3) of the embodiment 6 is composed of a plurality of first splitting auxiliary members 150 arranged at intervals. In addition, the second auxiliary member 100 involved in the modification example (2) is composed of a plurality of second splitting auxiliary members 160 arranged at intervals. The first splitting auxiliary member 150 and the second splitting auxiliary member 160 are arranged at a position where they overlap at least partially in the stacking direction Z. In this embodiment, the second splitting auxiliary member 160 is formed to be slightly larger than the first splitting auxiliary member 150. However, the first splitting auxiliary member 150 can also be formed to be slightly larger than the second splitting auxiliary member 160, and the first splitting auxiliary member 150 and the second splitting auxiliary member 160 can also be the same size.

[0198] like Fig.16As shown in (a) of FIG. 1 , the sensor sheet 18 of this embodiment can be configured such that in the stacking direction Z in which the first auxiliary member 50 is stacked on the first electrode sheet 25, the second auxiliary member 100 is arranged at a position overlapping with the first auxiliary member 50. Thus, a conductive path can be reliably formed through the first auxiliary member 50, and a conductive path can also be formed through the second auxiliary member 100. Thus, an increase in the resistance value of the sensor sheet 18 can be further suppressed.

[0199] like Fig.16 As shown in (b) in FIG. 1 , the sensor sheet 18 of this embodiment can be configured so that the second auxiliary member 100 does not overlap with the first auxiliary member 50 in the stacking direction Z where the first auxiliary member 50 is stacked on the first electrode sheet 25. By configuring the first auxiliary member 50 not to overlap with the second auxiliary member 100 in the stacking direction Z, the increase in the resistance value of the sensor sheet 18 can be suppressed without losing the flexibility of the sensor sheet 18.

[0200] like Fig.16 As shown in (c) of FIG. 1 , the sensor sheet 18 of this embodiment can be configured to be arranged at a position where the second auxiliary member 100 overlaps at least a portion of the first auxiliary member 50 in the stacking direction Z where the first electrode sheet 25 is stacked with the first auxiliary member 50. In the stacking direction Z, in the region where the first auxiliary member 50 and the second auxiliary member 100 overlap, the conduction path of the first electrode sheet 25 is ensured by both the first auxiliary member 50 and the second auxiliary member 100. Thus, the increase in the resistance value of the sensor sheet 18 can be further suppressed.

[0201] like Fig.16 (b)~ Fig.16 As shown in (c) of FIG. 1 , the second auxiliary member 100 of this embodiment is a plurality of second split auxiliary members 160 arranged discretely at intervals. Thus, a conductive path can be formed for a portion where the first electrode sheet 25 is locally bent greatly or where a large force is locally applied to the first electrode sheet 25.

[0202] The present invention is not limited to the above-described embodiments, and can be applied to various embodiments within the scope not departing from the gist of the invention.

Claims

1. A sensor sheet (18), wherein: The sensor sheet (18) comprises: An insulating insulator sheet (24); a first electrode sheet (25) formed of a first conductive cloth (41) having a first plated layer (44) made of metal on its surface, and arranged on one surface of the insulating sheet; and The first auxiliary member (50) comprises a first conductive material (50a) having conductivity, and is arranged on one surface of the first electrode sheet in a state where the first conductive cloth is electrically connected to the first conductive material, so as to form an electrical conduction path at a location where the first plating layer is broken.

2. The sensor sheet according to claim 1, wherein: The first electrode sheet includes an opening (34) which is a gap between a plurality of woven yarns constituting the first conductive cloth, and at least a portion of the first auxiliary member is arranged inside the opening.

3. The sensor sheet according to claim 1, wherein: The first auxiliary member is arranged on a first surface (29a) of the first electrode sheet that is located on the opposite side to the insulator sheet.

4. The sensor sheet according to claim 1, wherein: The first auxiliary member is arranged on a second surface (29b) of the first electrode sheet that is located on the insulating sheet side.

5. The sensor sheet according to claim 1, wherein: Each of the plurality of woven yarns of the first conductive cloth constituting the first electrode sheet is formed from one fiber.

6. The sensor sheet according to claim 1, wherein: The sensor sheet also has a second auxiliary component (100), which has a conductive second conductive material (80a) and is arranged on the other side of the first electrode sheet opposite to the one side in a state where the first conductive cloth is electrically connected to the second conductive material, thereby forming an electrical conduction path at the location where the first plating layer is broken.

7. The sensor sheet according to claim 6, wherein: The second auxiliary member is arranged at a position overlapping with at least a portion of the first auxiliary member in a stacking direction in which the first electrode sheet and the first auxiliary member are stacked.

8. The sensor sheet according to claim 6, wherein: The second auxiliary member is arranged at a position not overlapping with the first auxiliary member in a stacking direction in which the first electrode sheet and the first auxiliary member are stacked.

9. The sensor sheet according to claim 1, wherein: The first auxiliary member is a plurality of first splitting auxiliary members (150) arranged at intervals.

10. The sensor sheet according to claim 6, wherein: The second auxiliary member is a plurality of second splitting auxiliary members (160) that are discretely arranged at intervals.

11. The sensor sheet according to claim 1, wherein: The first electrode sheet comprises a neck portion (25b, 25e) narrower than other adjacent portions, and a wide portion (25c) disposed adjacent to the neck portion and wider than the neck portion. The first auxiliary member is disposed in a region of the first electrode sheet that includes at least a portion of the neck portion.

12. The sensor sheet according to claim 11, wherein The first auxiliary member is arranged across the neck portion and the wide portion.

13. The sensor sheet according to claim 11, wherein The first electrode sheet comprises a main body portion (25a) which is elongated in the longitudinal direction. The neck portion is formed to be narrow in width in a direction intersecting the longitudinal direction of the main body portion.

14. The sensor sheet according to claim 11, wherein The first electrode sheet comprises: a main body portion formed into a long strip in the long side direction; and an extension portion (25d) extending from the main body in a direction intersecting the longitudinal direction, A terminal portion (25f) connected to an external circuit is formed at a position close to the front end of the extension portion. The neck portion is formed between the main body portion and the terminal portion in the extension portion.

15. The sensor sheet according to claim 1, wherein The first auxiliary member is formed of a second conductive cloth (61) having a second plated layer (64) made of metal on its surface.

16. The sensor sheet according to claim 15, wherein: The second conductive cloth is formed of the same material as that of the first conductive cloth.

17. The sensor sheet according to claim 15, wherein: The second woven yarn (62) constituting the second conductive cloth is a twisted yarn in which a plurality of second fibers (63) are twisted together, or an untwisted yarn bundle in which a plurality of second fibers are bundled without being twisted together.

18. The sensor sheet according to claim 15, wherein: The first woven yarn (42) constituting the first conductive cloth is composed of first fibers (43). The second woven yarn constituting the second conductive cloth is composed of second fibers. The second fibers have a diameter smaller than a diameter of the first fibers.

19. The sensor sheet according to claim 15, wherein: The first woven yarns of the first conductive cloth constituting the first electrode sheet and the second woven yarns of the second conductive cloth constituting the first auxiliary member are aligned in the same direction.

20. The sensor sheet according to claim 15, wherein The insulator sheet is formed of an elastomer, At least a portion of the first electrode sheet and at least a portion of the first auxiliary member are buried in the elastic body.

21. The sensor sheet according to claim 1, wherein The first conductive material of the first auxiliary member is a conductive adhesive (92) containing a conductive filler and a curable resin.

22. The sensor sheet according to claim 1, wherein The first conductive material of the first auxiliary member is a conductive adhesive (50d) containing a conductive filler and a binder.

23. The sensor sheet according to claim 1, wherein: The first conductive material of the first auxiliary member is a conductive paste (93) containing a conductive filler and a binder resin.

24. The sensor sheet according to claim 1, wherein The first conductive material of the first auxiliary member includes the same metal as a metal constituting the first plated layer formed on the first conductive cloth of the first electrode sheet.

25. The sensor sheet according to claim 1, wherein The first conductive material of the first auxiliary member includes conductive carbon or graphite.

26. The sensor sheet according to claim 1, wherein The first conductive material of the first auxiliary member is a laminate of a conductive layer (50b) including a conductor and a conductive adhesive layer (50d) including a conductive filler and a curable resin or a conductive adhesive layer (50d) including a conductive filler and a binder resin.

27. The sensor sheet according to claim 26, wherein: The conductor layer is formed of a third conductive cloth (51) having a third plated layer (54) made of metal on its surface.

28. The sensor sheet according to claim 27, wherein: The metal constituting the third plated layer of the third conductive cloth is the same as the metal constituting the first plated layer of the first conductive cloth.

29. The sensor sheet according to claim 27, wherein: The third woven yarn (52) constituting the third conductive cloth is a twisted yarn in which a plurality of third fibers (53) are twisted together, or an untwisted yarn bundle in which a plurality of third fibers are bundled together without being twisted together.

30. The sensor sheet according to claim 27, wherein: The first woven yarn constituting the first conductive cloth is formed of first fibers. The third woven yarn constituting the third conductive cloth is formed of third fibers. The third fibers have a diameter smaller than a diameter of the first fibers.

31. The sensor sheet according to claim 27, wherein: The woven yarns of the first conductive cloth constituting the first electrode sheet and the woven yarns of the third conductive cloth constituting the first auxiliary member are oriented in the same direction.

32. The sensor sheet according to claim 1, wherein: The thickness of the first auxiliary member is smaller than the thickness of the first electrode sheet.

33. The sensor sheet according to claim 1, wherein: The first electrode sheet is formed into a long strip in the long side direction. The elastic modulus of the first auxiliary member in the longitudinal direction is greater than the elastic modulus of the first electrode sheet in the longitudinal direction.

34. The sensor sheet according to claim 1, wherein: The first electrode sheet is formed into a long strip in the long side direction. The bending strength of the first auxiliary member when the first auxiliary member is bent with a fold line in a direction intersecting the long side direction within the plane of the first auxiliary member being set as a fold line is greater than the bending strength of the first electrode sheet when the first electrode sheet is bent with a fold line in a direction intersecting the long side direction within the plane of the first auxiliary member being set as a fold line.

35. The sensor sheet according to claim 1, wherein: The first electrode sheet is formed into a long strip in the long side direction. The resistivity of the first auxiliary member in the long-side direction is the same as or lower than the resistivity of the first electrode sheet in the long-side direction.

36. The sensor sheet according to claim 1, wherein: The sensor sheet further comprises: a second electrode sheet (26) formed of a fourth conductive cloth (71) having a fourth plated layer (74) made of metal on its surface, and arranged on the other surface of the insulating sheet; and The third auxiliary member (80) comprises a second conductive material (80a) having conductivity, and is arranged on one surface of the second electrode sheet in a state where the fourth conductive cloth is electrically connected to the second conductive material, thereby forming an electrical conduction path at the portion where the fourth plating layer is broken.

37. The sensor sheet according to claim 36, wherein: The third auxiliary member is disposed at a position overlapping with at least a portion of the first auxiliary member in a stacking direction in which the second electrode sheet and the third auxiliary member are stacked.

38. The sensor sheet according to claim 36, wherein: In a stacking direction in which the second electrode sheet and the third auxiliary member are stacked, the third auxiliary member is arranged at a position not overlapping with the first auxiliary member.

39. The sensor sheet according to claim 36, wherein: The third auxiliary member includes a fifth conductive cloth (81) having a fifth plated layer (84) made of metal on its surface.

40. The sensor sheet according to claim 39, wherein The fifth conductive cloth is formed of the same material as that of the fourth conductive cloth.

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