JP7169455B2 - Sensor device and vehicle seat - Google Patents

Description

The present invention relates to a sensor device and a vehicle seat.

2. Description of the Related Art There is known a device that uses electrodes placed near a living body to detect motion and electrical phenomena of the living body in a non-contact manner. For example, a sensor device has been disclosed in which electrodes are provided on a vehicle seat to perform non-contact electrocardiographic measurement of a person (for example, Patent Document 1). In addition, since accurate electrocardiogram results cannot be obtained if the person is away from the vehicle seat, a pressure sensor is provided to detect whether the person is in the correct position. discloses a device that determines a biological condition (for example, Patent Document 2).

WO2019/116919 Japanese Patent No. 4962735

However, the method disclosed in Patent Document 2 requires the provision of a pressure sensor, which leads to an increase in cost and complicates the overall configuration. Therefore, there has been a demand for a sensor device that has a simple configuration and can accurately detect biological information when a person is in close contact with a vehicle seat.

According to one aspect of the present embodiment, a flexible and insulating sheet-like base material, a first electrode provided on one surface of the base material, and and a wiring electrode provided on the other surface of the base material and connected to a circuit board, and the first surface of the through hole is provided on the side of the one surface. A contact portion connected to the electrode is provided, and the contact portion connected to the wiring electrode is provided on the other side of the through hole.

According to the disclosed sensor device, it is possible to obtain a sensor device with a simple configuration that can accurately detect biological information while a person is in close contact with a vehicle seat.

1 is a perspective view of a vehicle seat provided with a sensor device according to a first embodiment; FIG. 1 is an exploded perspective view of a sensor device according to a first embodiment; FIG. FIG. 2 is a top view of the sensor device according to the first embodiment; Bottom view of the sensor device in the first embodiment Sectional view of the sensor device in the first embodiment Principal part sectional drawing of the sensor apparatus in 1st Embodiment Explanatory diagram (1) of the sensor device in the first embodiment Explanatory diagram (2) of the sensor device in the first embodiment Explanatory drawing of modification 1 of the sensor device in the first embodiment Explanatory drawing (1) of arrangement of wiring electrodes of the sensor device according to the first embodiment Explanatory drawing (2) of arrangement of wiring electrodes of the sensor device according to the first embodiment BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing (1) of the vehicle seat provided with the sensor device in 1st Embodiment Explanatory drawing (2) of a vehicle seat provided with the sensor device according to the first embodiment The top view of the sensor device in the second embodiment Bottom view of the sensor device in the second embodiment Sectional view of the sensor device in the second embodiment Top view of the sensor device in the third embodiment Bottom view of the sensor device in the third embodiment Cross-sectional view of the sensor device in the third embodiment Explanatory drawing (1) of the vehicle seat in the fourth embodiment Explanatory drawing (2) of the vehicle seat in the fourth embodiment Explanatory drawing of modification 1 of the vehicle seat in the fourth embodiment Explanatory drawing of modification 2 of the vehicle seat in the fourth embodiment Explanatory drawing of modification 3 of the vehicle seat in the fourth embodiment

The form for carrying out is demonstrated below. In addition, the same reference numerals are assigned to the same members and the description thereof is omitted.

[First Embodiment]
FIG. 1 is a diagram showing an example of a vehicle seat 100 provided with a sensor device 10 according to this embodiment. The vehicle seat 100 includes a backrest portion 100a and a seat portion 100b, and a plurality of sensor devices 10 are installed inside the respective surfaces. The vehicle seat 100 may have a function of blowing temperature-adjusting air from the surfaces of the backrest portion 100a and the seat portion 100b, for example. In this case, since the sensor device 10 according to the present embodiment has air permeability, it does not hinder the flow of air. Therefore, the sensor device 10 can be installed at an appropriate location on the backrest portion 100a or the seat portion 100b without affecting the temperature control function. such as electrical signals generated by living organisms) can be detected.

(sensor device)
Next, the sensor device 10 according to this embodiment will be described with reference to FIGS. 2 to 6. FIG. 2 is an exploded perspective view of sensor device 10 according to the present embodiment as seen from the bottom side, FIG. 3 is a top view, FIG. 4 is a bottom view, and FIG. -3B, and FIG. 6 is a cross-sectional view taken along dashed line 3C-3D in FIG. In addition, FIG. 6 is expanded for convenience.

The sensor device 10 according to the present embodiment includes a sheet-like base material 20, sensor electrodes 30 attached to one surface 21 of the base material 20, and a shield attached to the other surface 22 of the base material 20. and an electrode 40 . In the present application, the sensor electrode 30 may be referred to as the first electrode, and the shield electrode 40 as the second electrode.

A through-hole 23 is provided in the substrate 20, and a sensor lead-out electrode 31 extending to the through-hole 23 is formed in the sensor electrode 30 provided on one surface 21 of the base 20. A contact portion 31 a provided at the end of the through hole 23 covers one surface 21 side of the through hole 23 . A wiring electrode 50 having a contact portion 50a covering the through hole 23 is provided on the other surface 22 of the base material 20. The wiring electrode 50 is connected to a sensor electrode connection terminal 61 provided on the circuit board 60 and solder or the like. connected by In the present embodiment, the through hole 23 is formed in a circular shape, and the contact portion 31a of the sensor extraction electrode 31 and the contact portion 50a of the wiring electrode 50 are formed in a circular shape slightly larger than the through hole 23. .

A shield lead electrode 41 is formed on the shield electrode 40 provided on the other surface 22 of the base material 20 to reach the shield electrode connection terminal 62 of the circuit board 60, and the end portion of the shield lead electrode 41 is , are connected to shield electrode connection terminals 62 provided on the circuit board 60 by soldering or the like.

Therefore, the through hole 23 is covered with the contact portion 31a of the sensor lead electrode 31 on one surface 21 side of the substrate 20, and is covered with the contact portion 50a of the wiring electrode 50 on the other surface 22 side. It is Therefore, in the through hole 23 of the base material 20, the contact portion 31a of the sensor extraction electrode 31 and the contact portion 50a of the wiring electrode 50 face each other.

The sheet-shaped base material 20 is thin, flexible, and insulating. The base material 20 is made of, for example, nonwoven fabric. A nonwoven fabric is a sheet-shaped member in which insulating fibers are entangled and stretched in a plane. The nonwoven fabric is made of, for example, synthetic fibers such as polyester and polyimide, or inorganic fibers such as glass fibers.

The sensor electrode 30, the shield electrode 40, and the wiring electrode 50 are made of easily deformable conductive cloth, conductive mesh, or the like. For example, fabrics made of chemical fibers such as polyester fibers are surface-coated with metals (conductors) such as copper and nickel, or fabrics made of fiber materials containing conductive materials (such as carbon). formed. The circuit board 60 has insulating properties and is formed of a deformable flexible board.

In this embodiment, the thickness of the base material 20 is approximately 1 mm, and the thicknesses of the sensor electrode 30, the shield electrode 40 and the wiring electrode 50 are 0.1 to 0.2 mm. The through hole 23 provided in the base material 20 has a diameter of 5 mm to 10 mm.

The sensor electrode 30 is attached to one surface 21 of the substrate 20 with a bonding material such as an adhesive or hot melt, and the shield electrode 40 is attached to the other surface 22 of the substrate 20 using an adhesive or hot melt. It is attached by a bonding material such as melt. As a method of attaching the sensor electrode 30 and the shield electrode 40 to the base material 20, for example, the sensor electrode 30 and the shield electrode 40 are superimposed on the base material 20, and heat or vibration is applied to the place to be bonded. , may be melted by irradiation with a laser beam.

The size of the shield electrode body portion of the shield electrode 40 excluding the shield lead-out electrode 41 is formed to be larger than the size of the sensor electrode body portion of the sensor electrode 30 excluding the sensor lead-out electrode 31. , covering the sensor electrode body. That is, the sensor electrode main body is formed on one surface 21 within the area where the shield electrode main body is provided.

The sensor electrode 30 is arranged inside the vehicle seat 100 so as to be close to and face the outer surface of the vehicle seat 100, and is electrostatically coupled to a person (not shown) who is a living body. An electrical signal such as an electrocardiogram can be detected. Also, the shield electrode 40 is provided to suppress noise components incident from the side opposite to the living body.

The circuit board 60 is arranged inside the vehicle seat 100 away from the outer surface of the seat by bending the shield lead-out electrode 41 and the wiring electrode 50, and is a detection circuit for detecting an electric signal from the sensor electrode 30. Also, a detection unit having an amplifier circuit for amplifying the electric signal is provided. When detecting an electrical signal or the like from the living body, the shield electrode 40 may be controlled to have the same potential as the sensor electrode 30, for example.

The sensor device according to the present embodiment is installed in the vehicle seat 100 so that the sensor electrode 30 faces the outside as described above. Therefore, when a person sits on the vehicle seat 100 , the person who sits pushes the sensor device according to the present embodiment, and the contact portion 31 a of the sensor lead-out electrode 31 and the wiring contact portion 31 a of the sensor lead-out electrode 31 in the through hole 23 of the base material 20 . The contact portion 50a of the electrode 50 contacts and is electrically connected. Thus, the sensor electrode 30 and the circuit board 60 are connected by electrically connecting the sensor lead-out electrode 31 and the wiring electrode 50, and a voltage is applied to the sensor electrode 30, and electrostatically coupled with the human body. A potential generated on the surface of the human body is detected by the sensor electrode 30 and transmitted to the circuit board 60 .

Specifically, when no one is seated on the vehicle seat 100, the contact portion 31a of the sensor extraction electrode 31 and the contact portion 50a of the wiring electrode 50 are separated from each other in the through hole 23 of the base material 20. , the sensor electrode 30 and the circuit board 60 are not connected. However, when a person is seated on the vehicle seat 100, the contact portion 31a of the sensor lead electrode 31 and the contact portion 50a of the wiring electrode 50 are in contact with each other in the through hole 23 of the base material 20. The circuit board 60 is connected, a voltage is applied to the sensor electrode 30, and a detected electrical signal is output.

That is, in the present embodiment, the contact portion 31a of the sensor extraction electrode 31 and the contact portion 50a of the wiring electrode 50, which face each other in the through hole 23 of the substrate 20, constitute a contact structure, which functions as a switch. do. FIG. 7 is a diagram schematically showing the functions of the sensor device according to this embodiment. The switch 70 in FIG. 7 is formed by the contact portion 31a of the sensor lead-out electrode 31 and the contact portion 50a of the wiring electrode 50 facing each other in the through hole 23 of the substrate 20, and particularly requires other members. Instead, it is formed by providing a through hole 23 in the base material 20 and providing a contact portion 31a of the sensor extraction electrode 31 and a contact portion 50a of the wiring electrode 50 so as to face each other in the through hole 23 . As described above, since the through hole 23 is provided in the base material 20 and the sensor electrode 30 and the wiring electrode 50 are attached to the one surface 21 and the other surface 22 of the base material 20, the configuration is simple. Yes, and can be manufactured at low cost.

FIG. 8 is a diagram showing the circuit configuration of the sensor device according to this embodiment.
As shown in FIG. 8, the sensor electrode 30 is connected to the input (+) of an amplifier 72 via a switch 70. As shown in FIG. The output of the amplifier 72 is input to the detection section 71 , and the output of the amplifier 72 is connected to the input (−) of the amplifier 72 and also connected to the shield electrode 40 . A voltage of 2.5 V is applied to the input (+) side of the amplifier 72 connected to the sensor electrode 30 via a 5 GΩ resistor. The output of the amplifier 72 is connected to the shield electrode 40 so that the same voltage as the voltage of the sensor electrode 30 is applied to the shield electrode 40, but the ground potential may be applied.

In the present embodiment, when the voltage detected by the detection unit 71 exceeds a predetermined threshold, it is assumed that an electrical signal from the living body has been detected, and subsequent processing is performed. is treated as if no electrical signals from the living body were detected. Specifically, when a person sits on the vehicle seat 100, the contact portion 31a of the sensor lead-out electrode 31 and the contact portion 50a of the wiring electrode 50, which face each other in the through hole 23 of the substrate 20, come into contact with each other. Therefore, the switch 70 is turned on, voltage is applied to the sensor electrode 30 , and the detected electrical signal is transmitted to the detection section 71 . The voltage value of the electrical signal detected in this manner is a value exceeding a predetermined threshold. However, when no one is seated on the vehicle seat 100, the contact portion 31a of the sensor lead-out electrode 31 and the contact portion 50a of the wiring electrode 50 facing each other in the through hole 23 of the substrate 20 should not contact each other. Therefore, the switch 70 is non-conducting, and the voltage value detected by the detection unit 71 is an electrical signal from the living body detected by the wiring electrode 50. Since the area of the wiring electrode 50 is small, the predetermined threshold value It is below.

(Modification)
In this embodiment, as shown in FIG. 9, a sensor extraction electrode 31 and a first wiring electrode 51 are provided on one side 21 of the through hole 23 of the base material 20, and the other side 22 of the through hole 23 is provided. The second wiring electrode 52 may be provided on the . The first wiring electrode 51 is connected to the sensor electrode connection terminal of the circuit board 60, and the sensor extraction electrode 31 and the first wiring electrode 51 are separated. In this sensor device, when a person sits on the vehicle seat 100 , the sensor lead-out electrode 31 on one surface 21 and the second wiring electrode 52 on the other surface 22 come into contact with each other in the through hole 23 of the base material 20 . , the second wiring electrode 52 on the other surface 22 and the first wiring electrode 51 on the one surface 21 are in contact with each other. Thereby, an electric signal detected by the sensor electrode 30 is transmitted to the circuit board 60 via the sensor extraction electrode 31 , the second wiring electrode 52 and the first wiring electrode 51 . When no one is seated on the vehicle seat 100, the sensor extraction electrode 31 and the first wiring electrode 51 on one side 21 are separated from the second wiring electrode 52 on the other side 22. Therefore, the sensor electrodes 30 are not connected to the circuit board 60 .

Moreover, in the present embodiment, the wiring electrodes 50 are provided on the other surface 22 of the base material 20 and the other surface 64 of the circuit board 60 as shown in FIG. Alternatively, it may be provided on the other surface 22 of the substrate 20 and the one surface 63 of the circuit board 60 .

Furthermore, in the present embodiment, the sensor electrode 30 has the sensor lead-out electrode 31, and the contact portion 31a is provided on the sensor lead-out electrode 31. However, the sensor electrode 30 may be rectangular and the contact portion may be provided. .

(Installation on vehicle seat)
As shown in FIG. 12, a vehicle seat 100 according to the present embodiment includes a seat body 101 made of urethane or the like, a seat cover 102 covering the seat body 101, and the like. , is installed between the seat body portion 101 and the seat cover 102 .

In this embodiment, the sheet main body portion 101 may be provided with a hard portion 103 that is harder than other portions at positions corresponding to the through holes 23 of the base material 20 . The rigid portion 103 protrudes toward the sensor device 10 side more than other portions of the seat body portion 101 , and when a person sits on the vehicle seat 100 from the left side, the contact portion of the sensor lead-out electrode 31 through the seat cover 102 . 31a is pushed to the right side, but since the rigid portion 103 is harder than other portions of the sheet main body 101 and is less likely to deform, the contact portion 31a of the sensor lead-out electrode 31 and the contact portion 31a of the sensor lead-out electrode 31 facing each other in the through hole 23 of the substrate 20 Contact with the contact portion 50a of the wiring electrode 50 can be ensured.

Further, as shown in FIG. 13, a protrusion 102a may be provided inside the seat cover 102. As shown in FIG. The projecting portion 102 a is provided in a portion corresponding to the through hole 23 of the base member 20 of the sensor device 10 and protrudes from other portions of the seat cover 102 . As a result, when a person sits on the vehicle seat 100 from the left side, a force is applied to push the seat cover 102 to the right side, and the protrusion 102 a provided inside the seat cover 102 contacts the contact portion of the sensor lead-out electrode 31 . Since the contact portion 31a is pushed, contact between the contact portion 31a of the sensor extraction electrode 31 and the contact portion 50a of the wiring electrode 50 facing each other in the through hole 23 of the substrate 20 can be ensured.

[Second embodiment]
Next, a sensor device according to a second embodiment will be described with reference to FIGS. 14 to 16. FIG. 14 is a top view of the sensor device according to the present embodiment, FIG. 15 is a bottom view, and FIG. 16 is a cross-sectional view taken along dashed-dotted line 14A-14B in FIG.

The sensor device according to the present embodiment includes a first wiring electrode 151, a second wiring electrode 152, a third wiring electrode 153, and a fourth wiring electrode 154 so as to surround the sensor electrode 130 and the shield electrode 40. and a fifth wiring electrode 155 connected to the circuit board 60 is provided.

The sensor electrode 130 is formed on one surface 21 of the substrate 20, and the sensor electrode body is similar to the sensor electrode 30 in the first embodiment. The sensor electrode 130 is formed with a sensor lead-out electrode 131 extending in the upper right direction on one surface 21 of the substrate, and a contact portion 131a is provided at the end of the sensor lead-out electrode 131 .

The first wiring electrode 151 is provided on the other surface 22 of the base material 20 . The first wiring electrode 151 is provided above the shield electrode 40 shown in FIG. 15 and is formed to extend in the horizontal direction. Both ends of the first wiring electrode 151 are provided with contact portions 151a and 151b.

The second wiring electrode 152 is provided on one surface 21 of the base material 20 . The second wiring electrode 152 is provided on the left side of the sensor electrode 130 shown in FIG. 14, and is formed to extend vertically from the upper left to the middle of the left side. Both ends of the second wiring electrode 152 are provided with contact portions 152a and 152b.

The third wiring electrode 153 is provided on the other surface 22 of the base material 20 . The third wiring electrode 153 is provided on the right side of the shield electrode 40 shown in FIG. 15, and is formed to extend vertically from the center of the right side to the lower right. Both ends of the third wiring electrode 153 are provided with contact portions 153a and 153b.

The fourth wiring electrode 154 is provided on one surface 21 of the base material 20 . The fourth wiring electrode 154 is provided below the sensor electrode 130 shown in FIG. 14 and is formed to extend in the lateral direction. Both ends of the fourth wiring electrode 154 are provided with contact portions 154a and 154b.

The fifth wiring electrode 155 is provided on the other surface 22 of the base material 20 . The fifth wiring electrode 155 is provided on the left side of the shield electrode 40 shown in FIG. 15, and its end is connected to the sensor electrode connection terminal 61 provided on the circuit board 60 by soldering or the like. A contact portion 155 a is provided at the end of the fifth wiring electrode 155 opposite to the side connected to the sensor electrode connection terminal 61 of the circuit board 60 .

In the present embodiment, as shown in FIG. 16, the substrate 20 is provided with a through hole 123, and the contact portion 131a of the sensor lead-out electrode 131, the contact portion 131a, A contact portion 151a of the first wiring electrode 151 is provided on the other surface 22 side, thus forming a contact structure. Therefore, when no force is applied, the contact portion 131a of the sensor extraction electrode 131 and the contact portion 151a of the first wiring electrode 151 facing each other in the through hole 123 of the substrate 20 are separated from each other. When the contact portion 131a of the sensor lead-out electrode 131 is pressed from the side of one surface 21 of the material 20, the contact portion 131a of the sensor lead-out electrode 131 and the contact portion 151a of the first wiring electrode 151 are brought into contact with each other to electrically Connected.

Similarly, the substrate 20 is provided with a through hole (not shown) between the contact portion 151b of the first wiring electrode 151 and the contact portion 152a of the second wiring electrode 152. It's becoming A through hole (not shown) is also provided in the substrate 20 between the contact portion 152b of the second wiring electrode 152 and the contact portion 153a of the third wiring electrode 153, forming a contact structure. ing. Between the contact portion 153b of the third wiring electrode 153 and the contact portion 154a of the fourth wiring electrode 154, a through hole (not shown) is also provided in the substrate 20 to form a contact structure. . Between the contact portion 154b of the fourth wiring electrode 154 and the contact portion 155a of the fifth wiring electrode 155, a through hole (not shown) is also provided in the substrate 20 to form a contact structure. .

Therefore, five contact structures are provided in the sensor device according to the present embodiment. In the present embodiment, when a person sits on the vehicle seat 100 in a desired posture, the contact portions facing each other in the five contact structures are electrically connected, and the sensor electrodes are electrically connected. The electrical signal detected at 130 is transmitted to the circuit board 60 side.

That is, when a person sits in a desired posture, such as when a person sits in a state in which the entire back surface is in close contact with the vehicle seat 100, the contact portion 131a of the sensor extraction electrode 131 and the contact portion 151a of the first wiring electrode 151 are connected. , the contact portion 151b of the first wiring electrode 151 and the contact portion 152a of the second wiring electrode 152 are in contact, and the contact portion 152b of the second wiring electrode 152 and the contact portion of the third wiring electrode 153 are in contact. The contact portion 153b of the third wiring electrode 153 and the contact portion 154a of the fourth wiring electrode 154 are in contact, and the contact portion 154b of the fourth wiring electrode 154 and the fifth wiring electrode 155 are in contact. contact portion 155a.

Therefore, the electric signal detected by the sensor electrode 130 is applied to the sensor extraction electrode 131, the first wiring electrode 151, the second wiring electrode 152, the third wiring electrode 153, the fourth wiring electrode 154, and the fifth wiring. It is transmitted to the circuit board 60 via the electrodes 155 .

In this embodiment, the electrical signal detected by sensor electrode 130 is transmitted to circuit board 60 only when a desired weight is applied to the entire surface of the sensor device. In addition, when it is expected that an accurate detection result of biological information cannot be obtained because, for example, a part of the back is separated from the vehicle seat 100 and the desired weight is not applied to the entire surface of the sensor device. Since the detection signal is below the threshold, more accurate detection is possible.

Contents other than the above are the same as in the first embodiment.

[Third Embodiment]
Next, a sensor device according to a third embodiment will be described with reference to FIGS. 17 to 19. FIG. 17 is a top view of the sensor device according to the present embodiment, FIG. 18 is a bottom view, and FIG. 19 is a cross-sectional view taken along dashed-dotted line 17A-17B in FIG.

The sensor device according to this embodiment also has a contact structure between the shield electrode 240 and the circuit board 60 . By providing a contact structure on the side of the shield electrode 240 as well, even if static electricity noise flows in from the shield electrode 240 when there is no need to perform detection such as when a person is not seated, the contact structure provided on the circuit board 60 It is possible to prevent damage to circuit elements such as the detection unit.

In this embodiment, the shield electrode 240 is formed on the other surface 22 of the substrate 20, and the shield electrode body is similar to the shield electrode 40 in the first embodiment. The shield electrode 240 is formed with a shield lead electrode 241 extending rightward on the other surface 22 of the base material 20, and the end of the shield lead electrode 241 is provided with a contact portion 241a.

The sixth wiring electrode 256 is provided on one surface 21 of the base material 20 . The sixth wiring electrode 256 is provided on the right side of the sensor electrode 130 shown in FIG. 17 and is formed to extend in the vertical direction. Both ends of the sixth wiring electrode 256 are provided with contact portions 256a and 256b.

The seventh wiring electrode 257 is provided on the other surface 22 of the base material 20 . The seventh wiring electrode 257 is provided on the left side of the shield electrode 240 shown in FIG. 18, and its end is connected to the shield electrode connection terminal 62 provided on the circuit board 60 by soldering or the like. A contact portion 257 a is provided at the end of the seventh wiring electrode 257 opposite to the side connected to the shield electrode connection terminal 62 of the circuit board 60 .

In the present embodiment, through holes 223 and 224 are provided in the base material 20 as shown in FIG. In the portion where the through hole 223 is formed, the contact portion 256a of the sixth wiring electrode 256 is provided on the one surface 21 side of the base material 20, and the shield is provided on the other surface 22 side. A contact portion 241a of the extraction electrode 241 is provided to form a contact structure. In the portion where the through hole 224 is formed, the contact portion 256b of the sixth wiring electrode 256 is provided on one surface 21 side of the base material 20, and the contact portion 256b is provided on the other surface 22 side of the base material 20. , and a contact portion 257a of the seventh wiring electrode 257 are provided to form a contact structure.

Therefore, when no one is seated on the vehicle seat 100, the contact portion 256a of the sixth wiring electrode 256 and the contact portion 241a of the shield lead-out electrode 241 facing each other in the through hole 223 of the base material 20 are separated from each other. , the contact portion 256b of the sixth wiring electrode 256 and the contact portion 257a of the seventh wiring electrode 257, which face each other in the through hole 224 of the substrate 20, are separated from each other.

When a person sits on the vehicle seat 100, the sensor lead-out electrode 131 is pushed from the one surface 21 side of the substrate 20, and the contact portion 256a of the sixth wiring electrode 256 and the contact portion 241a of the shield lead-out electrode 241 are brought into contact with each other. The contact portion 256b of the sixth wiring electrode 256 and the contact portion 257a of the seventh wiring electrode 257 are brought into contact and electrically connected.

Contents other than the above are the same as those of the second embodiment.

[Fourth Embodiment]
Next, a fourth embodiment will be described. As shown in FIGS. 20 to 24, the vehicle seat of the present embodiment is characterized by seat main body 101 or seat cover 102 of vehicle seat 100 having sensor device 10 of the first embodiment installed therein. It has The sensor device 10 is installed between the seat body portion 101 and the seat cover 102 of the vehicle seat 100 .

In one of the present embodiments, as shown in FIG. 20, a recess 102b is provided inside the seat cover 102 to receive the sensor device 10. As shown in FIG. It is put in the recess 102b inside the seat cover 102. - 特許庁

Since the seat cover 102 is thinner at the recess 102b than at other portions, when a person sits on the vehicle seat 100, the distance between the sensor device 10 and the person becomes short, and the static electricity between the person and the sensor device 10 becomes short. The state of connection is stabilized, and biometric information of a person sitting in a vehicle seat can be obtained more accurately. Further, by inserting the sensor device 10 into the recess 102b of the seat cover 102, the position of the sensor device 10 is stabilized, and the sensor device 10 moves between the seat body 101 and the seat cover 102 during use. You can prevent it from getting lost.

Further, in this embodiment, as shown in FIG. 22, the portion of the seat main body portion 101 where the sensor device 10 is installed may be formed of a hard portion 101a that is harder than the other portions. The hard part 101a is made of, for example, hard urethane. In this way, in the seat body portion 101, the portion where the sensor device 10 is installed is formed of the hard portion 101a that is harder than the other portions, so that even when a person sits on the vehicle seat, the hard portion 101a is is hard, it does not deform much compared to other parts, and the capacitive coupling between the person and the sensor device 10 is more reliable.

Further, in this embodiment, as shown in FIG. 23, in the seat body portion 101, the portion where the sensor device 10 is installed is provided with a convex portion 101b projecting toward the sensor device 10 side more than the other portions. It can be anything that exists. By providing the convex portion 101b in the portion where the sensor device 10 is installed in the seat main body portion 101 in this way, when a person sits on the vehicle seat, the portion where the convex portion 101b is provided in particular can be easily displaced. is concentrated, the capacitive coupling between the person and the sensor device 10 becomes more reliable.

Further, in this embodiment, as shown in FIG. 24, a seat structure member 104 made of metal or a hard resin material is positioned behind a portion of the seat main body 101 where the sensor device 10 is installed. The sensor device 10 may be installed as follows. The seat structure member 104 is made of a material harder than the seat body portion 101, and when a person sits on the vehicle seat, the seat body portion 101 is thin at the portion where the seat structure member 104 is provided. , less deformation than other parts. Therefore, the load of the person is concentrated on the portion where the sensor device 10 is installed, and the capacitive coupling between the person and the sensor device 10 becomes more reliable.

Although the embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes are possible within the scope described in the claims.

This international application claims priority based on Japanese Patent Application No. 2019-166306 filed on September 12, 2019, and the entire contents of this application are incorporated into this international application.

10 Sensor device 20 Base material 21 One surface 22 The other surface 23 Through hole 30 Sensor electrode 31 Sensor extraction electrode 31a Contact portion 40 Shield electrode 50 Wiring electrode 50a Contact portion 60 Circuit board 61 Sensor electrode connection terminal 62 Shield electrode connection terminal 100 Vehicle seat 100a Backrest portion 100b Seat portion 101 Seat body portion 102 Seat cover

Claims (8)

a flexible and insulating sheet-like base material;
a first electrode provided on one surface of the substrate;
a through hole provided in the base material;
a wiring electrode provided on the other surface of the base material and connected to a circuit board;
has
A contact portion connected to the first electrode is provided on the one surface side of the through hole,
A contact portion connected to a wiring electrode is provided on the other surface side of the through hole ,
A second electrode is provided on the other surface of the base material,
The first electrode is formed on the one surface in the region where the second electrode is provided,
A first wiring electrode and a second wiring electrode for electrically connecting the first electrode and the circuit board are provided around the first electrode and the second electrode. ,
In the substrate, a through hole is formed between an end of the first wiring electrode provided on the one surface and an end of the second wiring electrode provided on the other surface. A sensor device, comprising: 2. The sensor device according to claim 1 , wherein the first electrode and the second electrode are formed of a conductive cloth or a conductive mesh in which the surfaces of fibers are coated with a conductor. a contact portion connected to the second electrode provided on the other surface of the base;
another wiring electrode having a contact portion at an end provided on the one surface of the substrate;
has
3. The base material according to claim 1 , wherein a through hole is provided between the contact portion connected to the second electrode and the contact portion of the other wiring electrode. The described sensor device. 4. The sensor device according to any one of claims 1 to 3 , wherein the base material is a non-woven fabric. a flexible and insulating sheet-like base material;
a first electrode provided on one surface of the substrate;
a through hole provided in the base material;
a wiring electrode provided on the other surface of the base material and connected to a circuit board;
has
A contact portion connected to the first electrode is provided on the one surface side of the through hole,
A contact portion connected to a wiring electrode is provided on the other surface side of the through hole,
The circuit board is provided with a detection unit,
The wiring electrode is connected to the detection unit,
The sensor device according to claim 1, wherein an electric signal is detected at the first electrode when the value of the voltage detected by the detection unit exceeds a predetermined threshold. a sensor device;
a seat body;
a seat cover that covers the seat body;
has
The sensor device is
installed between the seat body and the seat cover ,
a flexible and insulating sheet-like base material;
a first electrode provided on one surface of the substrate;
a through hole provided in the base material;
a wiring electrode provided on the other surface of the base material and connected to a circuit board;
has
A contact portion connected to the first electrode is provided on the one surface side of the through hole,
A contact portion connected to a wiring electrode is provided on the other surface side of the through hole,
A vehicle seat according to claim 1, wherein the seat body includes a hard portion that is harder than other portions of the seat body at a position facing the contact portion of the sensor device . 7. The vehicle seat according to claim 6 , wherein the rigid portion protrudes toward the sensor device from other portions of the seat body. a sensor device;
a seat body;
a seat cover that covers the seat body;
has
The sensor device is
installed between the seat body and the seat cover,
a flexible and insulating sheet-like base material;
a first electrode provided on one surface of the substrate;
a through hole provided in the base material;
a wiring electrode provided on the other surface of the base material and connected to a circuit board;
has
A contact portion connected to the first electrode is provided on the one surface side of the through hole,
A contact portion connected to a wiring electrode is provided on the other surface side of the through hole,
A vehicle seat, wherein a protrusion is provided inside the seat cover at a position facing the contact portion of the sensor device.

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