JP2024112532A - Pressure Detector - Google Patents

Abstract

To provide a pressure detector having a pair of pressure sensors which are symmetrical and can be easily manufactured.SOLUTION: The pressure detector includes: a first pressure sensor arranged in a predetermined first surface; and a second pressure sensor arranged in a predetermined second surface, the first pressure sensor and the second pressure sensor being symmetrical. The first pressure sensor has a first array substrate and a first sensor sheet deposited on the first surface sequentially. The second pressure sensor has a second sensor sheet and a second array substrate deposited on the second surface sequentially. The second pressure sensor and the first pressure sensor have the same structure.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pressure detection device.

A pressure sensor is a device that detects input pressure. The pressure sensor in the following patent document includes an array substrate on which multiple array electrodes are provided, a sensor sheet that covers the array electrodes, and a protective sheet that covers the sensor sheet.

JP 2022-49511 A

In recent years, studies have been conducted on attaching a pressure sensor to a part of a human body and detecting the pressure acting on that part. For example, to detect the pressure distribution acting on the sole of the foot, a pressure sensor for the right foot that matches the shape of the right sole, and a pressure sensor for the left foot that matches the shape of the left sole, are required. Thus, some parts on which pressure sensors are attached have symmetrical shapes. However, manufacturing the pressure sensors for the right foot and the left foot separately complicates the manufacture of the pressure sensors and increases the manufacturing costs. For these reasons, it is desirable to be able to easily manufacture a pair of symmetrical pressure sensors.

The present invention aims to provide a pressure detection device that is symmetrical and has a pair of pressure sensors that are easy to manufacture.

A pressure detection device according to one aspect of the present disclosure includes a first pressure sensor arranged on a predetermined first surface, and a second pressure sensor arranged on a predetermined second surface and symmetrical to the first pressure sensor. The first pressure sensor includes a first array substrate and a first sensor sheet that are stacked in order on the first surface. The second pressure sensor includes a second sensor sheet and a second array substrate that are stacked in order on the second surface. The second pressure sensor and the first pressure sensor have the same structure.

FIG. 1 is an exploded perspective view of a pressure detection device according to a first embodiment. FIG. 2 is a plan view of the pressure detection device of the first embodiment as viewed from above. FIG. 3 is a cross-sectional view of the right shoe taken in a direction perpendicular to the first plane direction. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view showing a state in which a pressure (load) is input to the first pressure sensor. FIG. 6 is a circuit diagram showing a circuit configuration of the first pressure sensor according to the first embodiment. FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. FIG. 8 is a cross-sectional view showing a state in which a load (pressure) is input to the second pressure sensor. FIG. 9 is an exploded perspective view of the pressure detection device according to the second embodiment. FIG. 10 is a schematic diagram of a pressure sensor device according to the third embodiment. FIG. 11 is a cross-sectional view of the pressure sensor of the first modified example. FIG. 12 is a cross-sectional view of the pressure sensor of the first modification in a state where pressure is input. FIG. 13 is a cross-sectional view of a pressure sensor according to the second modification. FIG. 14 is a cross-sectional view of the pressure sensor of the second modification in a state where pressure is input. FIG. 15 is a cross-sectional view of a pressure sensor according to the third modification. FIG. 16 is a cross-sectional view of a pressure sensor according to the fourth modification.

A detailed description of the form (embodiment) for carrying out the pressure detection device of the present disclosure will be given with reference to the drawings. The invention of the present disclosure is not limited to the contents described in the following embodiment. The components described below include those that a person skilled in the art can easily imagine and those that are substantially the same. Furthermore, the components described below can be appropriately combined. Note that the disclosure is merely an example, and those that a person skilled in the art can easily imagine appropriate modifications while maintaining the gist of the invention are naturally included in the scope of the present invention. In order to make the explanation clearer, the drawings may show the width, thickness, shape, etc. of each part in a schematic manner compared to the actual embodiment, but they are merely an example and do not limit the interpretation of the present invention. Furthermore, in this specification and each figure, the same reference numerals are used for components similar to those described above with respect to the previous figures, and detailed explanations may be omitted as appropriate.

In addition, in this specification and claims, when describing a mode in which a structure is placed on top of another structure, the term "on top" is used, unless otherwise specified, to include both a case in which another structure is placed directly on top of a structure so as to be in contact with the structure, and a case in which another structure is placed above a structure via yet another structure.

(Embodiment 1)
Fig. 1 is an exploded perspective view of a pressure detection device of embodiment 1. As shown in Fig. 1, the pressure detection device 100 of embodiment 1 is a device that is placed on the bottom surface of a shoe 200 and measures the load (pressure) acting on the bottom surface of the shoe 200. In other words, the pressure detection device 100 is a device that measures the weight distribution on the sole of a person's foot. The shoe 200 includes a right shoe 210 and a left shoe 220.

The pressure detection device 100 comprises a first pressure sensor 1 attached to the bottom surface (predetermined first surface) 211 of a right shoe 210, and a second pressure sensor 2 attached to the bottom surface (predetermined second surface) 221 of a left shoe 220. The first pressure sensor 1 comprises a first array substrate 10 and a first sensor sheet 20. The second pressure sensor 2 comprises a second array substrate 30 and a second sensor sheet 40.

In addition, in this embodiment, the first pressure sensor 1 and the second pressure sensor 2 are overlaid with insoles 250 (insole 251 for the right foot and insole 252 for the left foot). Hereinafter, the direction in which the insole 250 is arranged from the bottom surface of the shoe 200 is referred to as the first direction X1. The direction in which the bottom surface of the shoe 200 is arranged from the insole 250 is referred to as the second direction X2.

2 is a plan view of the pressure detection device of the first embodiment as viewed from above. As shown in FIG. 2, the first pressure sensor 1 has the same shape as the bottom surface 211 of the right shoe 210 (see FIG. 1). The second pressure sensor 2 has the same shape as the bottom surface 221 of the left shoe 220 (see FIG. 1). The first pressure sensor 1 and the second pressure sensor 2 are line-symmetric (bilaterally symmetric) with respect to a virtual line L extending in the first planar direction Y. The first planar direction Y is parallel to a virtual plane perpendicular to the first direction X1 (second direction X2), and is perpendicular to the direction in which the first pressure sensor 1 and the second pressure sensor 2 are arranged (hereinafter referred to as the second planar direction Z).

The first array substrate 10 of the first pressure sensor 1 is provided with a first wiring substrate 3. Similarly, the second array substrate 30 of the second pressure sensor 2 is provided with a second wiring substrate 5. The first wiring substrate 3 and the second wiring substrate 5 are flexible printed circuit boards. The first wiring substrate 3 is electrically connected to the first control substrate 4. The second wiring substrate 5 is electrically connected to the second control substrate 6. The first control substrate 4 and the second control substrate 6 are provided with control units 4a and 6a and batteries 4b and 6b, respectively.

The control units 4a and 6a are so-called computers, and are equipped with a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and storage devices such as a hard disk drive (HDD). The CPU reads and executes programs stored in the RAM, and outputs the results of the calculations to the storage device. The RAM is a main memory that can record and read programs and data. The ROM stores programs such as the BIOS (Basic Input Output System). In addition, the batteries 4b and 6b supply a predetermined amount of voltage signals to a gate line driving circuit (not shown) and a signal line selection circuit (not shown), and supply a predetermined amount of current to the common electrode (first common electrode 22 (see FIG. 4) or second common electrode 42 (see FIG. 7)).

Figure 3 is a cross-sectional view of the right shoe cut in a direction perpendicular to the first plane direction. The first wiring board 3 and the first control board 4 are attached to the right side 213 of the right shoe 210. Therefore, no load (pressure) acts on the first wiring board 3 and the first control board 4. The first control board 4 is also attached to the outer side of the right side 213. This prevents the first control board 4 from interfering with putting on the right shoe 210 or causing discomfort when exercising. Although not specifically shown, the second wiring board 5 and the second control board 6 are also attached to the side of the right side of the left shoe 220.

Figure 4 is a cross-sectional view taken along line IV-IV in Figure 2. As shown in Figure 4, the first pressure sensor 1 comprises a first array substrate 10 and a first sensor sheet 20, which are stacked in this order on the bottom surface 211 of a right shoe 210. The first array substrate 10 comprises a first array substrate 11 and a first array layer 12 arranged in the first direction X1 of the first array substrate 11. In addition, a plurality of first array electrodes 13 are provided on the surface 12a of the first array layer 12 facing the first direction X1. The plurality of first array electrodes 13 are arranged in a matrix in the first planar direction Y and the second planar direction Z (see Figure 2).

The first array substrate 11 is an insulating resin substrate. The surface of the first array substrate 11 facing the second direction X2 constitutes the bottom surface 1a of the first pressure sensor 1, and abuts against the bottom surface 211 of the right shoe 210. An adhesive layer may be provided on the bottom surface 1a of the first pressure sensor 1, and the first pressure sensor 1 may be adhered to the bottom surface 211. Other configurations of the first array substrate 10 will be described later.

The first sensor sheet 20 includes a first sensor substrate 21, a first common electrode 22 provided on the surface of the first sensor substrate 21 in the second direction X2, and a first sensor layer 23 provided on the surface of the first common electrode 22 in the second direction X2. The first sensor substrate 21 is made of, for example, a resin substrate or a resin film, and is insulating and flexible. The surface of the first sensor substrate 21 in the first direction X1 constitutes the surface 1b of the first pressure sensor 1. The surface 1b of the first pressure sensor 1 is in contact with the right foot insole 251. The first common electrode 22 is a solid film provided on the entire surface of the first sensor substrate in the second direction X2. A predetermined amount of current is supplied to the first common electrode 22 from a battery 4b (see FIG. 2) through a supply line (not shown).

The lower surface of the first sensor layer 23 abuts against the first array electrode 13. The first sensor layer 23 is a pressure-sensitive layer that contains conductive particles inside a highly insulating resin layer. The particles are dispersed inside the resin layer and are separated from each other. Therefore, when the resin layer is not deformed, the resistance value of the first sensor layer 23 is high, and the first array electrode 13 and the first common electrode 22 are not electrically connected.

Figure 5 is a cross-sectional view showing a state in which pressure (load) is input to the first pressure sensor. On the other hand, as shown in Figure 5, when pressure F is input to a part of the surface 1b of the first pressure sensor 1 and the resin layer of the first sensor layer 23 is deformed, the fine particles come into contact or approach each other, and the resistance value of the first sensor layer 23 decreases. As a result, a current flows from the first common electrode 22 to the first array electrode 13 through the first sensor layer 23 (see arrow A in Figure 5). Also, when the deformation amount of the resin layer increases, the amount of contact of the fine particles increases, and the resistance value of the first sensor layer 23 decreases significantly. Therefore, the current flowing to the first array electrode 13 increases. Therefore, the current value input to the first array electrode 13 increases in proportion to the input pressure.

As shown in FIG. 4, the first array layer 12 is provided with a plurality of first transistors 14. The plurality of first transistors 14 are arranged in a matrix in the first planar direction Y and the second planar direction Z. The first transistor 14 includes a semiconductor layer 14a, a gate insulating film 14b, a gate electrode 14c, a source electrode 14d, and a drain electrode 14e. The source electrode 14d is electrically connected to the first array electrode 13.

The first array substrate 11 and the first array layer 12 are flexible. Therefore, when a load is input to the first array substrate 10 from the second direction X2, the substrate 10 is deformed. As a result, the load is transmitted to the first sensor sheet 20 arranged in the first direction X1. Note that in the first array substrate 10, a stretchable substrate having a portion with a meandering shape may be used as the first array substrate 11. A stretchable substrate has excellent elasticity and flexibility.

Figure 6 is a circuit diagram showing the circuit configuration of the first pressure sensor of embodiment 1. As shown in Figure 6, the first array layer 12 has gate lines 15, signal lines 16, a gate line driving circuit (not shown), and a signal line selection circuit (not shown) as a configuration for driving the first transistor 14. The gate lines 15 extend in the second planar direction Z and are connected to the gate electrode 14c of the first transistor 14. A plurality of gate lines 15 are provided and arranged in the first planar direction Y. The signal lines 16 extend in the first planar direction Y and are connected to the drain electrode 14e. A plurality of signal lines 16 are provided and arranged in the second planar direction Z.

The gate line driving circuit is a circuit that drives multiple gate lines 15 based on various control signals. The gate line driving circuit selects multiple gate lines 15 sequentially or simultaneously and supplies a gate driving signal to the selected gate lines 15. The signal line selection circuit is a switch circuit that selects multiple signal lines 16 sequentially or simultaneously. The signal line selection circuit is, for example, a multiplexer. The signal line selection circuit connects the selected signal line 16 to the control unit 4a based on a selection signal supplied from the control unit 4a. From the above, when the gate lines 15 are scanned, the electrical state of the first array electrode 13, in other words, the electrical signal (current value) input to the first array electrode 13 is sent to the control unit 4a via the signal line 16.

The second pressure sensor 2 is the same as the first pressure sensor 1. In detail, the second pressure sensor 2 is the first pressure sensor rotated 180 degrees (flipped) around the imaginary line L (see FIG. 2). Therefore, in the second pressure sensor 2, the second array board 30 is arranged in the first direction X1 of the second sensor sheet 40. In addition, the bottom surface 1a of the first pressure sensor 1 is replaced with the surface 2b of the second pressure sensor 2. The surface 1b of the first pressure sensor 1 is replaced with the bottom surface 2a of the second pressure sensor 2. In addition, as shown in FIG. 2, the first wiring board 3 and the first control board 4 arranged on the left side of the first array board 10 are arranged on the right side of the second array board 30 in the second pressure sensor 2.

Next, the second pressure sensor 2 will be described in detail, but the second array substrate 30 has the same structure as the first array substrate 10, and the second sensor sheet 40 has the same structure as the first sensor sheet 20. Therefore, the description of the structures of the second array substrate 30 and the second sensor sheet 40 will be omitted. However, the second pressure sensor 2 is an inverted version of the first pressure sensor 1, and is arranged differently from the first pressure sensor 1. Therefore, the following description will focus on the arrangement of the second pressure sensor 2.

Figure 7 is a cross-sectional view taken along the line VII-VII in Figure 2. As shown in Figure 7, the second pressure sensor 2 comprises a second sensor sheet 40 and a second array substrate 30, which are stacked in this order on the bottom surface 221 of the left shoe 220. The second sensor sheet 40 comprises a second sensor substrate 41, a second common electrode 42 provided on the surface of the second sensor substrate 41 in the first direction X1, and a second sensor layer 43 provided on the surface of the second common electrode 42 in the first direction X1. The surface of the second sensor substrate 41 in the second direction X2 constitutes the bottom surface 2a of the second pressure sensor 2, and is in contact with the bottom surface 221 of the left shoe 220. An adhesive layer may be provided on the bottom surface 2a of the second pressure sensor 2, and the second pressure sensor 2 may be bonded to the bottom surface 221.

The second array substrate 30 includes a second array substrate 31, which is a base material, and a second array layer 32 arranged in the second direction X2 of the second array substrate 31. The surface of the second array substrate 31 facing the first direction X1 constitutes the surface 2b of the second pressure sensor 2 and abuts against the left foot insole 252. A plurality of second array electrodes 33 abutting against the second sensor layer 43 are provided on the surface 32a of the second array layer 32 facing the second direction X2. A plurality of second transistors 34 are provided on the second array layer 32. The second transistor 34 includes a semiconductor layer 34a, a gate insulating film 34b, a gate electrode 34c, a source electrode 34d, and a drain electrode 34e.

Figure 8 is a cross-sectional view showing a state in which a load (pressure) is input to the second pressure sensor. As shown in Figure 8, in the second pressure sensor 2, the load (pressure) is input to a part of the surface 2b. In addition, the second array substrate 30 is flexible. Therefore, the second array substrate 30 is deformed, and the load (pressure) is transmitted to the second sensor layer 43. As a result, the second sensor layer 43 is crushed, the resistance value of the second sensor layer is reduced, and a current flows from the second common electrode 42 to the second array electrode 33 (see arrow B in Figure 8). Then, the electrical signal input to the second array electrode 33 is sent to the control unit 6a via the signal line 16 (see Figure 6), and the pressure input to the surface 2b is detected.

As described above, according to the pressure detection device 100 of the first embodiment, if two first pressure sensors are manufactured, one of them can be used as the second pressure sensor. Therefore, only the manufacturing line for manufacturing the first pressure sensor is required, and manufacturing costs can be reduced.

In addition, in the first embodiment, an example is given in which the pressure detection device 100 is applied to detect the distribution of weight acting on the soles of the feet, but the present disclosure may be applied to other parts of the body. Below, we will explain the second embodiment, which is applied to the hand.

(Embodiment 2)
9 is an exploded perspective view of a pressure detection device of embodiment 2. Pressure detection device 300 of embodiment 2 is a device that is inserted inside glove 400 that covers hand 500 (right hand 501, left hand 502) and measures the load (pressure) acting on the palm and back of the hand. Glove 400 includes right hand glove 410 and left hand glove 420.

The right hand glove 410 includes a right hand inner part 411 that covers the palm 501a of the right hand 501, and a right hand outer part 412 that covers the back 501b of the right hand 501. The left hand glove 420 includes a left hand inner part 421 that covers the palm 502a of the left hand 502, and a left hand outer part 422 that covers the back 502b of the left hand 502. Note that in FIG. 9, the right hand inner part 411 and the right hand outer part 412 are shown in an exploded state, but in reality they are integrated. Similarly, in FIG. 9, the left hand inner part 421 and the left hand outer part 422 are shown in an exploded state, but in reality they are integrated.

The pressure detection device 300 includes an inner pressure sensor for the right hand (first pressure sensor) 301, an inner pressure sensor for the left hand (second pressure sensor) 302, an outer pressure sensor for the right hand 303, and an outer pressure sensor for the left hand 304.

The right hand inner pressure sensor 301 comprises a first array board 311 and a first sensor sheet 312 which are stacked in order on the right hand inner part 411.

The left hand inner pressure sensor 302 comprises a second sensor sheet 322 and a second array board 321 which are layered in order on the left hand inner part 421. The right hand inner pressure sensor 301 and the left hand inner pressure sensor 302 are symmetrical in shape. In other words, the left hand inner pressure sensor 302 is the right hand inner pressure sensor 301 rotated 180 degrees (flipped over) based on an imaginary line L (see FIG. 9) that extends in the front-to-rear direction for the left hand. Therefore, the left hand inner pressure sensor 302 is the same as the right hand inner pressure sensor 301, and the left hand inner pressure sensor 302 can be manufactured on the same manufacturing line as the right hand inner pressure sensor 301.

The right hand outer pressure sensor 303 includes a third sheet sensor 332 and a third array board 331 that are stacked in order on the right hand outer part 412. The right hand inner pressure sensor 301 and the right hand outer pressure sensor 303 have the same shape when viewed from the direction in which the right hand inner part 411 and the right hand outer part 412 overlap. In other words, the right hand outer pressure sensor 303 is the same as the right hand inner pressure sensor 301. Therefore, the right hand outer pressure sensor 303 can be manufactured on the same manufacturing line that manufactures the right hand inner pressure sensor 301.

The left hand outer pressure sensor 304 includes a fourth array substrate 341 and a fourth sheet sensor 342 that are stacked in order on the left hand outer portion 414. The left hand outer pressure sensor 304 and the left hand inner pressure sensor 302 have the same shape when viewed from the stacking direction in which the left hand inner portion 421 and the left hand outer portion 422 overlap. Therefore, the left hand outer pressure sensor 304 is the same as the right hand inner pressure sensor 301, and the left hand outer pressure sensor 304 can be manufactured on the same manufacturing line that manufactures the right hand inner pressure sensor 301.

As described above, according to the pressure detection device 300 of the second embodiment, once the right hand inner pressure sensor (first pressure sensor) 301 is manufactured, it can be used as the left hand inner pressure sensor 302 (second pressure sensor). Furthermore, it can also be used as the right hand outer pressure sensor 303 or the left hand outer pressure sensor 304. Therefore, only a manufacturing line for manufacturing the right hand inner pressure sensor (first pressure sensor) 301 is required, which reduces manufacturing costs.

Although the first and second embodiments have been described above, the present disclosure is not limited to shoes 200 or gloves 400, and may be attached directly to a human body, such as the sole of the foot or the palm, or may be attached to a robot, etc. Next, a third embodiment in which the wiring board of the pressure detection device 100 of the first embodiment is modified will be described.

(Embodiment 3)
FIG. 10 is a schematic diagram of a pressure sensor device of the third embodiment. As shown in FIG. 10, the pressure sensor device 600 of the third embodiment differs from the first embodiment in that the first wiring board 603 of the first pressure sensor 1 is L-shaped. Therefore, the second wiring board 605 of the second pressure sensor 2 is also L-shaped. The first wiring board 603 has an end 603a connected to the first array board 10 and an end 603b opposite to the end 603a. The second wiring board 605 has an end 605a connected to the second array board 30 and an end 605b opposite to the end 605a. The end 603b and the end 605b are connected to the control board 604. According to the pressure sensor device 600, the number of control boards can be reduced compared to the pressure detection device 100 of the first embodiment.

Although each embodiment has been described above, the present disclosure is not limited to the examples described in the embodiments. For example, in the second pressure sensor, the distance from the bottom surface of the second pressure sensor, where pressure is input, to the second sensor layer is large. For this reason, pressure may be easily absorbed by the second array substrate or the second array layer, and sensitivity may be low. Therefore, the control unit 6a of the second pressure sensor 2 may perform correction processing to increase sensitivity.

In the embodiment, the sensor layer (first sensor layer 23 and second sensor layer 43) is exemplified as a highly insulating resin layer containing conductive fine particles, but the present disclosure is not limited to this. Below, modified examples 1 and 2 in which the sensor layer is modified are described.

(Variation 1)
Fig. 11 is a cross-sectional view of the pressure sensor of the first modification. Fig. 12 is a cross-sectional view of the pressure sensor of the first modification when pressure is input. The first sensor layer 23A of the first modification is made of conductive resin. A plurality of convex portions 24 are provided on the surface of the first sensor layer 23A in the second direction X2. At least a portion of the plurality of convex portions 24 contacts the first array electrode 13. However, since the contact area is small, the first common electrode 22 and the first array electrode 13 are not electrically connected.

When pressure is input, as shown in FIG. 12, when the first sensor layer 23A moves in the second direction X2, the number of convex portions 24 in contact with the first array electrode 13 increases, and the contact area with the first array electrode 13 increases. This electrically connects the first array electrode 13 and the first common electrode 22, and a current flows through the first array electrode 13. Also, when the input pressure is large, the convex portions 24 are pressed against the first array electrode 13 and flattened. This further increases the contact area with the first array electrode 13, and more current flows through the first array electrode 13. Thus, according to the first modification, the first sensor layer 23A inputs a larger amount of current to the first array electrode 13 in proportion to the increase in pressure (increase in contact area). Therefore, the pressure value can be detected based on the magnitude of the current value.

(Variation 2)
Fig. 13 is a cross-sectional view of the pressure sensor of the second modification. Fig. 14 is a cross-sectional view of the pressure sensor of the second modification when pressure is input. As shown in Fig. 13, the first sensor layer 23B of the second modification is made of conductive resin. The surface of the first sensor layer 23B in the second direction X2 is flattened and separated from the first array electrode 13. Therefore, the first common electrode 22 and the first array electrode 13 are not electrically connected.

When pressure is input, as shown in FIG. 14, the first sensor layer 23B moves in the second direction X2 and comes into contact with the first array electrode 13. This electrically connects the first array electrode 13 and the first common electrode 22, and a current flows through the first array electrode 13. Furthermore, if the input pressure is large, the contact area between the first sensor layer 23B and the first array electrode 13 further increases, and more current flows through the first array electrode 13. Thus, according to the second modification, the first sensor layer 23 inputs a larger amount of current to the first array electrode 13 in proportion to the increase in pressure (increase in the contact area). Therefore, the pressure value can be detected based on the magnitude of the current value.

In the embodiment, the common electrodes (first common electrode 22 and second common electrode 42) are illustrated as opposed electrodes arranged between the sensor layer (first sensor layer 23 and second sensor layer 43) and the sensor substrate (first sensor substrate 21 and second sensor substrate 41), but the present disclosure is not limited to this. Below, we will explain modified examples 3 and 4 in which the common electrodes are modified.

(Variation 3)
Fig. 15 is a cross-sectional view of a pressure sensor of Modification 3. As shown in Fig. 15, the first common electrode 25 of Modification 3 is different from that of the first embodiment in that it is provided on the surface 12a of the first array substrate 10, not between the first sensor layer 23 and the first sensor base material 21. In other words, the first array electrode 13 and the first common electrode 25 are arranged in a so-called parallel type. According to Modification 3, when the resistance value of the first sensor layer 23 is reduced, a current flows from the first common electrode 25 to the first array electrode 13, as shown by the arrow C in Fig. 15.

(Variation 4)
FIG. 16 is a cross-sectional view of the pressure sensor of the fourth modification. As shown in FIG. 16, the first common electrode 25 of the fourth modification is provided on the surface 12a of the first array substrate 10 in the same manner as the third modification. In addition, in the fourth modification, an electrode 26 is provided between the first sensor layer 23 and the first sensor base material 21. Therefore, the fourth modification is a hybrid type including the first common electrode 25 and the electrode 26. Note that a predetermined amount of current supplied from the battery 4b (see FIG. 2) is supplied to the first common electrode 25. According to the fourth modification, when the resistance value of the first sensor layer 23 is reduced, a current flows from the first common electrode 25 to the electrode 26, and then flows from the electrode 26 to the first array electrode 13, as shown by the arrow D in FIG. 16.

Although the above describes Modifications 3 and 4, the sensor layers in Modifications 3 and 4 may use the first sensor layer 23A or the first sensor layer 23B described in Modifications 1 and 2.

1 First pressure sensor 1a, 2a Bottom surface 1b, 2b Surface 2 Second pressure sensor 3, 603 First wiring board 4 First control board 5, 605 Second wiring board 6 Second control board 10 First array board 11 First array substrate 12 First array layer 13 First array electrode 14 First transistor 20 First sensor sheet 21 First sensor substrate 22 First common electrode 23, 23A, 23B First sensor layer 25 First common electrode 26 Electrode 30 Second array substrate 31 Second array substrate 32 Second array layer 34 Second transistor 40 Second sensor sheet 41 Second sensor substrate 42 Second common electrode 43 Second sensor layer 100, 300 Pressure detection device 200 Shoe 211 Bottom surface (predetermined first surface)
221 bottom surface (predetermined second surface)
400 Glove 301 Right hand inner pressure sensor (first pressure sensor)
302 Left hand inner pressure sensor (second pressure sensor)
303 Right hand outer pressure sensor 304 Left hand outer pressure sensor 311 First array substrate 312 First sensor sheet 321 Second array substrate 322 Second sensor sheet 331 Third array substrate 332 Third sheet sensor 341 Fourth array substrate 342 Fourth sheet sensor

Claims (4)

A first pressure sensor disposed on a predetermined first surface;
a second pressure sensor disposed on a predetermined second surface and symmetrical to the first pressure sensor;
Equipped with
the first pressure sensor includes a first array substrate and a first sensor sheet, which are stacked in order on the first surface;
the second pressure sensor includes a second sensor sheet and a second array substrate, which are stacked in order on the second surface;
The second pressure sensor and the first pressure sensor have the same structure. the first pressure sensor has a first wiring substrate, one end of which is connected to the first array substrate;
the second pressure sensor has one end connected to the second array substrate and a second wiring substrate that is symmetrical to the first wiring substrate;
The pressure detection device according to claim 1 , wherein the other end of the first wiring board and the other end of the second wiring board are connected to a common control board. The pressure detection device according to claim 1 or 2, wherein the first surface and the second surface are in the shape of a foot. The pressure detection device according to claim 1 , wherein the first surface and the second surface are in the shape of a hand.

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