WO2020040248A1 - Sensor-equipped seat - Google Patents

Sensor-equipped seat Download PDF

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Publication number
WO2020040248A1
WO2020040248A1 PCT/JP2019/032793 JP2019032793W WO2020040248A1 WO 2020040248 A1 WO2020040248 A1 WO 2020040248A1 JP 2019032793 W JP2019032793 W JP 2019032793W WO 2020040248 A1 WO2020040248 A1 WO 2020040248A1
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WO
WIPO (PCT)
Prior art keywords
sheet
sensor
conductive
cloth
conductive cloth
Prior art date
Application number
PCT/JP2019/032793
Other languages
French (fr)
Japanese (ja)
Inventor
慎二 杉山
太郎 村山
知也 ▲高▼橋
Original Assignee
テイ・エス テック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by テイ・エス テック株式会社 filed Critical テイ・エス テック株式会社
Publication of WO2020040248A1 publication Critical patent/WO2020040248A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for

Definitions

  • the present invention relates to a sensor-equipped seat, and more particularly to a sensor-equipped seat having a function of measuring biological information of a seated person sitting on the seat.
  • a vehicle seat having a function of measuring biological information of a driver at the time of driving a vehicle is known.
  • a driver uses a capacitive coupling type sensor that detects a driver's body potential.
  • Various seats and the like have been proposed that have a function of measuring a heart rate and promptly informing the driver when an abnormality occurs in the change of the heart rate (specifically, see Patent Documents 1 and 2). .
  • a capacitance-coupled sheet-shaped sensor is disposed between a cushion pad and a trim cover that constitute a seatback, and a living body of a seated person detected from the sheet-shaped sensor is detected. It is disclosed that a heart rate of a seated person is measured based on an electric signal. More specifically, the sheet-like sensor is attached to the cushion pad with an adhesive, and is covered with a trim cover having a three-layer structure of a conductive cloth, a skin, and a wading material in order from the surface on the occupant side.
  • the vehicle seat with an occupant detection sensor described in Patent Document 2 also has the same configuration, and discloses a configuration in which a seat-shaped occupant detection sensor, a wading material, and a skin are sequentially bonded on a seat pad.
  • the sheet-shaped sensor is configured to be attached to a cushion pad with an adhesive or a double-sided tape or the like.
  • a wadding material is disposed in order to suppress the occurrence of wrinkles that affect the appearance and durability of the trim cover. Since is an insulator, there is a possibility that the capacitance due to the sheet-shaped sensor may decrease.
  • a device for facilitating attachment of the sheet-shaped sensor has been required in order to suppress the manufacturing cost.
  • the present invention has been made in view of the above problems, and an object of the present invention is to more stably detect a biological signal of a seated person in a seat with a sensor having a function of measuring biological information of the seated person. It is an object of the present invention to provide a sensor-equipped sheet capable of performing the following. It is another object of the present invention to provide a sensor-equipped sheet that can suppress a decrease in capacitance due to a sheet-like sensor. It is another object of the present invention to provide a sensor-equipped sheet that can reduce manufacturing costs.
  • the object is to provide a seat body formed by covering a cushion pad with an epidermis, and an electric power disposed between the cushion pad and the epidermis and according to a bioelectric potential of a seated person.
  • a sheet-shaped sensor that detects a signal, based on the electric signal detected from the sheet-shaped sensor, a sensor-equipped seat that can measure the biological information of the seated person, wherein the sheet-shaped sensor, The problem is solved by being attached to the skin at a predetermined portion facing the skin.
  • the sheet-shaped sensor is attached not to the cushion pad but to the skin, it is possible to suppress the position of the sheet-shaped sensor from being shifted with respect to the skin on the occupant side, The biological signal of the seated person can be stably detected.
  • the sheet-like sensor is attached to the skin in advance, when assembling the seat body, the cushion pad may be covered with the skin with the sheet-like sensor, so that the assembly becomes easy and the manufacturing cost can be reduced. it can.
  • the skin is provided on the seated person side, and is at least composed of a conductive cloth having conductivity, and a wading material attached to the back surface of the conductive cloth.
  • a folded portion that is folded back to the side opposite to the seated person side so as to sandwich a wading material therebetween is formed, and the sheet-shaped sensor is attached to the folded portion of the conductive cloth in the skin. good.
  • one end portion of the wadding material is folded back together with the conductive cloth at the folded portion so as not to protrude from the conductive cloth.
  • the conductive cloth includes a first conductive cloth disposed on one side in a predetermined direction of the sheet body, and a second conductive cloth disposed on the other side in the predetermined direction.
  • the sensor is disposed at a position facing the first conductive cloth, and is disposed at a position opposite to the first sheet-like sensor attached to the folded portion provided on the first conductive cloth and the second conductive cloth.
  • a second sheet-like sensor attached to the folded portion provided on the second conductive cloth.
  • the conductive cloth has a cloth end attaching portion to which ends of the first conductive cloth and the second conductive cloth are attached to each other, and the cloth end attaching portion is provided with the first sheet-like sensor and the first sheet-like sensor. It is good to be arrange
  • the conductive cloth is at least composed of a base cloth and a conductive yarn attached to the base cloth and made of a conductive material, and a first conductive yarn provided on the first conductive cloth; It is preferable that the second conductive yarn provided on the two conductive cloths extend along a predetermined direction and are arranged at different positions in a direction intersecting the predetermined direction.
  • the sheet-shaped sensor is at least constituted by a conductive sheet having conductivity, and a conductive wire provided on a surface of the conductive sheet and made of a conductive material. It is preferable that a portion where no line is provided is sewn to the skin. According to the above configuration, it is possible to avoid direct sewing on the conductive wire on the conductive sheet, so that deformation or the like of the conductive wire can be suppressed.
  • the sheet-shaped sensor has a base film attached to the back surface of the conductive sheet, and a portion of the base film facing the first sheet-shaped sensor and a portion facing the second sheet-shaped sensor. It is preferable that a long through-hole is formed in the width direction of the sheet between the portion to be formed.
  • the first sheet-shaped sensor is a sensor for configuring a ground electrode portion that defines a reference potential when detecting an electric signal according to the bioelectric potential of the seated person, and the first sheet-shaped sensor is The sensor is preferably formed to be wider toward both sides in the sheet width direction than the second sheet-shaped sensor. According to the above configuration, since the sensor forming the ground electrode portion is relatively wide, the electrical contact between the occupant and the ground electrode is more stable, and the biological signal of the occupant can be more stably detected.
  • the sheet-shaped sensor is provided on a seat cushion of the seat body, and the first sheet-shaped sensor is provided on each of left and right sides in a seat width direction, and a center portion of the sheet body is interposed therebetween.
  • the second sheet-shaped sensor is disposed at a sandwiching position, and is provided on each of left and right sides in a sheet width direction, and is disposed at a position sandwiching a central portion of the sheet body.
  • the present invention it is possible to realize a sensor-equipped seat that can more stably detect a biological signal of a seated person.
  • a sensor-equipped sheet that can suppress manufacturing costs.
  • deformation and the like of the sheet-like sensor (conductive wire) can be suppressed.
  • the weight of the sheet-shaped sensor can be reduced while securing the holding property of the sheet-shaped sensor.
  • FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, illustrating a connection relationship between a conductive cloth and a sheet-like sensor. It is a top view of a sensor unit. It is a figure explaining the positional relationship of a seated person and a sheet-like sensor. It is a top view of the sensor unit of a 2nd embodiment.
  • This embodiment includes a sheet-shaped sensor that is disposed between a cushion pad and an epidermis in a seat body and detects an electric signal according to a bioelectric potential of a seated person, and seats based on the electric signal detected from the sheet-shaped sensor.
  • a sensor-equipped sheet capable of measuring a person's biological information, wherein the skin is made up of a conductive cloth having conductivity and a wadding material attached to the back surface of the conductive cloth.
  • a folded portion that is folded back to the side opposite to the occupant side is formed so that the folded portion of the conductive cloth in the skin is attached to the folded portion of the seat. It relates to the invention.
  • the side of the sensor-equipped seat with respect to the seat back is the front side of the seat.
  • the sensor-equipped seat S of the present embodiment is a vehicle seat, and is attached to a seat body including a seat cushion 1, a seat back 2, and a headrest 3, and is mounted inside the seat body.
  • a heart rate measuring device D biological information measuring device
  • the heart rate measuring device D is attached to a rear portion inside the seat cushion 1 and detects an electric signal according to a bioelectric potential of a seated person.
  • the sensor unit 30 is attached to a front portion inside the seat cushion 1 and a sensor unit.
  • an electric control unit (ECU) 50 that is connected via a cable 40 and receives an electric signal detected by the sensor unit 30 and analyzes the electric signal to calculate a heart rate of the occupant. Is configured.
  • the seat cushion 1 is a seating portion that supports an occupant from below, and is configured by placing a cushion pad 10 on a cushion frame (not shown) serving as a skeleton and covering the cushion pad 10 with a skin 20.
  • the seat back 2 is a backrest portion that supports the occupant's back from behind, and is configured by placing a cushion pad (not shown) on a back frame (not shown) serving as a skeleton and covered with a skin (not shown).
  • the headrest 3 is a head that supports the occupant's head from behind, and is configured by placing a cushion pad (not shown) on a headrest pillar (not shown) serving as a core material and covered with a skin (not shown). .
  • the cushion pad 10 is a pad member made of urethane foam or the like. As shown in FIG. 2, on the left and right side portions in the seat width direction on the surface of the cushion pad 10, a skin suspension extending in the seat front-rear direction is provided. Each of the grooves 11 and 12 is formed, and a through hole 13 is formed in a central portion in the seat width direction for inserting a cable 40 connecting the sensor unit 30 and the ECU 50.
  • the skin 20 is provided on the occupant side, and has a conductive cloth 21 having conductivity, and a wadding material 22 attached to the back surface of the conductive cloth 21 with an adhesive or a double-sided tape. It is composed of
  • the conductive cloth 21 includes a base cloth 21a made of a natural fiber or a synthetic fiber, and a conductive thread 21b attached to the base cloth by sewing and made of a conductive material.
  • the wadding material 22 is formed of, for example, a PVC (polyvinyl chloride) foam, a PP (polypropylene) foam, a PE (polyethylene) foam, or the like.
  • a portion facing the portion where the sensor unit 30 is arranged and a peripheral portion of the seat cushion 1 are formed of the conductive cloth 21 and the wading material 22.
  • a rectangular skin 20a with a thread is attached.
  • a threadless skin 20b made of a base cloth 21a and a wading material 22 is attached to a portion other than the above-described portion and the peripheral portion of the seat cushion 1. That is, the threadless skin 20b has no conductivity because the conductive thread 21b is not sewn on the base cloth 21a. According to the above configuration, it is possible to reduce the manufacturing cost while suppressing a decrease in the capacitance of the sensor unit 30.
  • the conductive cloth 21 is, as shown in FIG. 2, arranged in a substantially rectangular central portion of the seat cushion 1, and is arranged so as to be arranged on the rear side of the seat with respect to the first conductive cloth 21.
  • a second conductive cloth 21 having a rectangular shape.
  • the first conductive yarn 21b provided on the first conductive cloth 21 and the second conductive yarn 21b provided on the second conductive cloth 21 respectively extend in a dashed line along the front-back direction of the sheet, and extend in the sheet width direction.
  • the plurality of first conductive yarns 21b and the plurality of second conductive yarns 21b are respectively arranged at different positions in the sheet width direction.
  • first conductive yarn 21b and the second conductive yarn 21b are considered so as not to contact each other, a first sheet-like sensor 32 described later connected to the first conductive cloth 21 and a second conductive yarn 21b It is possible to suppress mutual interference between the cloth 21 and a second sheet-like sensor 33 to be described later connected thereto.
  • a folded portion 23 that is folded back to the side opposite to the occupant side is formed in a central portion of the threaded skin 20a in the front-back direction of the seat.
  • One end of the conductive cloth 21 is folded at the folded portion 23 so as to sandwich the one end of the wadding material 22 therebetween.
  • One end of the wading material 22 is folded back together with the conductive cloth 21 at the folded portion 23 so as not to protrude from one end of the conductive cloth 21.
  • a cloth end attachment portion 24 to which the respective ends of the first conductive cloth 21 and the second conductive cloth 21 are attached by sewing is formed.
  • the cloth edge attachment portion 24 is formed so as to extend along the sheet width direction.
  • the sensor unit 30 is disposed between the cushion pad 10 and the skin 20 as shown in FIG. 2, and a base film 31 serving as a base material and a surface of the base film 31 as shown in FIGS. Among them, a pair of left and right first sheet-like sensors 32 attached to the front part of the seat, a pair of left and right second sheet-like sensors 33 attached to the rear part of the seat, and a buffer attached between the left and right second sheet-like sensors And a circuit 34.
  • the base film 31 is a rectangular film base formed of PET (polyethylene terephthalate) or the like.
  • a pair of left and right through holes 31a is formed between the left and right first sheet sensors 32 and the left and right second sheet sensors 33.
  • the left and right through holes 31a are formed so as to be long in the sheet width direction, and are arranged apart from each other so as to sandwich the central portion of the base film 31 in the sheet width direction.
  • the first sheet-shaped sensor 32 is a capacitive coupling type sensor, and is a ground that defines a reference potential when detecting an electric signal corresponding to a bioelectric potential of a seated person. It is a sensor that becomes an electrode unit.
  • the left and right first sheet-like sensors 32 are provided on the conductive sheet 32a having conductivity, the conductive sheet 32a, a conductive line 32b made of a conductive material, and laminated on the conductive sheet 32a, and have a conductivity. It mainly comprises a conductive rubber 32c and a conductive sheet 32a, a conductive wire 32b, and a dielectric (not shown) laminated on the surface of the conductive rubber 32c.
  • the dielectric (not shown) is, for example, a coating layer made of a metal ink such as barium titanate, which increases the capacitance between the occupant's skin and the sensor and increases the detection accuracy of the sensor. is there.
  • the conductive sheet 32a is formed from a conductive carbon resin sheet.
  • the conductive wire 32b is a conductive wire member formed of a metal such as silver, and is included in the conductive sheet 32a.
  • the left and right conductive lines 32b extend so as to form a predetermined conductor pattern, and more specifically, extend so as to form two rectangular bodies adjacent in the sheet width direction. Extending on a diagonal line of. In other words, the left and right conductive lines 32b are arranged to intersect at two or more locations.
  • the end portions of the left and right conductive wires 32b are gathered at the central portion in the sheet width direction, and the gathered end portions extend toward the rear of the seat and are connected to the input terminals 34b provided in the buffer circuit 34. Have been.
  • the conductive rubber 32c is a rectangular member formed by mixing conductive carbon black or the like with a known rubber raw material, and extends so as to be long in the sheet width direction.
  • the conductive rubber 32c is disposed on the conductive sheet 32a at a portion different from the portion provided with the conductive wire 32b.
  • the second sheet-shaped sensor 33 is a sensor that, together with the first sheet-shaped sensor 32, detects an electric signal corresponding to the bioelectric potential of the occupant.
  • the bioelectric potential of the occupant changes according to the heart rate (heart rate) of the occupant, and as a result, an electric signal corresponding to the heart rate of the occupant is detected.
  • the left and right second sheet sensors 33 have substantially the same configuration as the left and right first sheet sensors 32.
  • the left and right conductive lines 33b each extend to form a predetermined conductor pattern, and specifically, extend to form two rectangular bodies that are adjacent to each other in the sheet front-rear direction. It extends diagonally and on the center line of the body. In other words, the left and right conductive lines 33b are arranged to intersect at two or more locations.
  • the end portions of the left and right conductive lines 33b are gathered at a central portion in the sheet width direction, and the gathered end portions extend inward in the sheet width direction to form input terminals 34b provided in the buffer circuit 34. It is connected.
  • the left and right first sheet-like sensors 32 and the left and right second sheet-like sensors 33 are respectively arranged at positions sandwiching the central portion of the seat cushion 1.
  • the left and right first sheet-like sensors 32 are formed to be wider toward both sides in the sheet width direction than the left and right second sheet-like sensors 33, and are also wider in the sheet width direction than the left and right through holes 31a. Are formed so as to become wider toward both sides of the.
  • the left and right second sheet-like sensors 33 are formed to be narrower in the sheet width direction than the left and right through holes 31a.
  • the buffer circuit 34 is an electric circuit that relays between the sheet sensors 32 and 33 and the ECU 50. More specifically, the buffer circuit 34 amplifies electric signals from the sheet sensors 32 and 33. , And outputs the amplified signal to the ECU 50.
  • the buffer circuit 34 is connected to a rectangular circuit board 34a serving as a base, an input terminal 34b mounted on the circuit board 34a and connected to the sheet sensors 32 and 33, and a cable 40 provided on the ECU 50 side. And an input terminal 34c.
  • the sensor unit 30 is attached by sewing to the folded portion 23 of the skin 20 (the threaded skin 20a). More specifically, the first sheet-like sensor 32 and the second sheet-like sensor 33 are arranged at positions facing the first conductive cloth 21 and the second conductive cloth 21, respectively, in the threaded skin 20a. Each is attached to the folded portion 23 of the first conductive cloth 21 and the folded portion 23 of the second conductive cloth 21. Therefore, while the wadding material 22 is applied to the conductive cloth 21, the conductive cloth 21 is directly connected to the sheet-like sensors 32 and 33, so that wrinkles of the conductive cloth 21 can be suppressed, and the sheet-like sensor can be formed. A decrease in capacitance due to the sensors 32 and 33 can be suppressed.
  • conductive rubbers 32c and 33c are sewn to the skin 20 together with the conductive sheets 32a and 33a. Therefore, since it is possible to avoid direct sewing on the conductive lines 32b and 33b on the conductive sheets 32a and 33a, deformation of the conductive lines 32b and 33b can be suppressed.
  • the conductive rubbers 32c and 33c are provided, the sewing attachment strength can be improved, and the detection sensitivity of the sensor can be improved.
  • the cloth end attachment portion 24 is disposed in the through hole 31 a between the first sheet-like sensor 32 and the second sheet-like sensor 33. Therefore, the first sheet sensor 32 and the second sheet sensor 33 can be prevented from interfering with each other.
  • the first sheet-like sensor 32 and the second sheet-like sensor 33 are respectively provided on the left and right sides in the sheet width direction, and are arranged at positions sandwiching the central portion of the sheet body. Have been. Therefore, as shown in FIG. 5, these sheet-like sensors 32 and 33 are arranged at positions where the left and right buttocks (sciatic tuberosity) of the seated person are easily contacted, and the biological signal of the seated person is more stably transmitted. Can be detected. Further, since the sheet-like sensors 32 and 33 are arranged so as to avoid the central portion of the seat body, depending on the softness of the seat cushion 1, for example, the seat cushion 1 faces the central portion of the left and right hips of the seated person. Where the position is in the non-contact range, the sensor can be arranged avoiding the non-contact range, and the detection sensitivity of the sensor can be improved.
  • the cable 40 is a known cable member that connects the sensor unit 30 and the ECU 50, as shown in FIG. More specifically, the cable 40 bends and extends downward from the rear part of the seat of the sensor unit 30 to pass through the through hole 13 of the cushion pad 10, and further bends forward of the seat so as to be bent at the bottom of the cushion frame (not shown). And is connected to the ECU 50.
  • the ECU 50 is a control part of the heart rate measuring device D, and is attached to a bottom surface of a cushion frame (not shown) of the seat cushion 1.
  • the ECU 50 calculates the heart rate of the occupant by analyzing the electric signal detected by the sensor unit 30.
  • a known calculation method for example, a calculation method described in JP-A-2015-123359
  • JP-A-2015-123359 a calculation method described in JP-A-2015-123359
  • a sensor unit 130 according to a second embodiment will be described with reference to FIG. In the following description, the description of the same contents as those of the sensor unit 30 will be omitted.
  • the shape of the through-hole 131a is different from that of the sensor unit 30.
  • the left and right through holes 131a have a substantially L-shape, and are formed to be long in the sheet width direction. Further, of the left and right through holes 131a, the inner portion in the sheet width direction is formed to be wider in the sheet front-rear direction than the outer portion in the sheet width direction.
  • the left and right through holes 131a are sandwiched between the left and right sheet sensors 132, 133 and have a shape along the outer edges of the left and right sheet sensors 132, 133.
  • the sheet sensors 32 and 33 are mounted inside the seat cushion 1, but can be changed without any particular limitation, and can be mounted inside the seat back 2. Or it may be mounted inside the headrest 3.
  • the sensor-equipped seat S includes the heart rate measuring device D that measures the heart rate of the occupant seated on the seat, but is not particularly limited.
  • a biological information measuring device for measuring biological information other than the number for example, electrocardiogram, blood pressure, body temperature, respiration, etc., may be provided instead.
  • the vehicle seat used for an automobile has been described as a specific example.However, without being limited to this, a vehicle seat such as a train, a bus, an airplane, a vehicle seat such as a ship, and a work seat It can also be used as an office chair.
  • the sensor-equipped sheet according to the present invention has been mainly described.
  • the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention.
  • the present invention can be modified and improved without departing from the gist of the present invention, and the present invention naturally includes equivalents thereof.
  • the arrangement and configuration of the skin and sheet-like sensors described in the above embodiment are merely examples, and do not limit the present invention.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Pathology (AREA)
  • Cardiology (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Signal Processing (AREA)
  • Physiology (AREA)
  • Seats For Vehicles (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

Provided is a sensor-equipped seat that can more stably detect a biological signal of a sitter. A sensor-equipped seat (S) comprises sheet-shaped sensors (32, 33) that are positioned between a cushion pad (10) and a surface cover (20) in a seat cushion (1), and detect an electrical signal corresponding to the bioelectric potential of a sitter, wherein biological information for the sitter can be measured on the basis of the electrical signal detected from the sheet-shaped sensors (32, 33). The surface cover (20) is structured from a conductive fabric (21) that is electrically conductive, and a wadding material (22) that is attached to the underside of the conductive fabric (21). Formed at one end section of the conductive fabric (21) is a foldover section (23) that is folded over to the opposite side from a sitter side, so as to sandwich the wadding material (22) therein. The sheet-shaped sensors (32, 33) are attached to the foldover section (23) of the conductive fabric (21) in the surface cover (20).

Description

センサ付きシートSeat with sensor
　本発明は、センサ付きシートに係り、特に、シートに着座している着座者の生体情報を計測する機能を備えたセンサ付きシートに関する。 The present invention relates to a sensor-equipped seat, and more particularly to a sensor-equipped seat having a function of measuring biological information of a seated person sitting on the seat.
　従来、車両運転時において運転者の生体情報を計測する機能を備えた車両用シートが知られており、例えば、運転者の身体電位を検出する静電容量結合型のセンサを用いて運転者の心拍を計測し、心拍の変化に異常が生じた場合に運転者に素早く報知することが可能な機能を備えたシート等が種々提案されている（具体的には、特許文献１，２参照）。 2. Description of the Related Art Conventionally, a vehicle seat having a function of measuring biological information of a driver at the time of driving a vehicle is known. For example, a driver uses a capacitive coupling type sensor that detects a driver's body potential. Various seats and the like have been proposed that have a function of measuring a heart rate and promptly informing the driver when an abnormality occurs in the change of the heart rate (specifically, see Patent Documents 1 and 2). .
　特許文献１に記載の車両用シートでは、シートバックを構成するクッションパッドとトリムカバーの間に静電容量結合型のシート状センサが配置されており、シート状センサから検出された着座者の生体電気信号に基づいて着座者の心拍を計測することが開示されている。
　詳しく言うと、シート状センサは、クッションパッド上に接着剤によって貼り付けられており、着座者側の表面から順に導電布、表皮及びワディング材の３層構造からなるトリムカバーによって被覆されている。 In the vehicle seat described in Patent Literature 1, a capacitance-coupled sheet-shaped sensor is disposed between a cushion pad and a trim cover that constitute a seatback, and a living body of a seated person detected from the sheet-shaped sensor is detected. It is disclosed that a heart rate of a seated person is measured based on an electric signal.
More specifically, the sheet-like sensor is attached to the cushion pad with an adhesive, and is covered with a trim cover having a three-layer structure of a conductive cloth, a skin, and a wading material in order from the surface on the occupant side.
　また、特許文献２に記載の乗員検知センサ付き乗り物用シートも同様の構成であって、シートパッド上にシート状の乗員検知センサ、ワディング材及び表皮が順に接着された構成が開示されている。 The vehicle seat with an occupant detection sensor described in Patent Document 2 also has the same configuration, and discloses a configuration in which a seat-shaped occupant detection sensor, a wading material, and a skin are sequentially bonded on a seat pad.
特開２０１５－１２３３５９号公報JP 2015-123359 A 特開２０１７－９４９７９号公報JP 2017-94979 A
　ところで、特許文献１、２のような車両用シートでは、シート状センサがクッションパッドに対して接着剤や両面テープ等で貼り付けられる構成となっているため、着座者側にあるトリムカバー（導電布）に対してシート状センサの位置がずれてしまい、着座者の生体信号を安定的に検出できなくなる虞があった。
　また、着座者側にある導電布とシート状センサとの間には、トリムカバーの外観性、耐久性に影響するしわの発生を抑制すべく、ワディング材が配置されているところ、当該ワディング材は絶縁体であるため、シート状センサによる静電容量が低下してしまう虞があった。
　また、シート状センサ付きの車両用シートを製造するにあたって、製造コストを抑制すべく、シート状センサの取り付けを容易にする工夫が求められていた。 By the way, in a vehicle seat as disclosed in Patent Documents 1 and 2, the sheet-shaped sensor is configured to be attached to a cushion pad with an adhesive or a double-sided tape or the like. There is a possibility that the position of the sheet-shaped sensor is shifted with respect to the cloth), and the biological signal of the seated person cannot be detected stably.
Further, between the conductive cloth on the occupant side and the sheet-shaped sensor, a wadding material is disposed in order to suppress the occurrence of wrinkles that affect the appearance and durability of the trim cover. Since is an insulator, there is a possibility that the capacitance due to the sheet-shaped sensor may decrease.
Further, when manufacturing a vehicle seat with a sheet-shaped sensor, a device for facilitating attachment of the sheet-shaped sensor has been required in order to suppress the manufacturing cost.
　本発明は、上記の課題に鑑みてなされたものであり、本発明の目的は、着座者の生体情報を計測する機能を備えたセンサ付きシートにおいて、着座者の生体信号をより安定的に検出することが可能なセンサ付きシートを提供することにある。
　また、本発明の他の目的は、シート状センサによる静電容量の低下を抑制することが可能なセンサ付きシートを提供することにある。
　また、本発明の他の目的は、製造コストを抑制することが可能なセンサ付きシートを提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to more stably detect a biological signal of a seated person in a seat with a sensor having a function of measuring biological information of the seated person. It is an object of the present invention to provide a sensor-equipped sheet capable of performing the following.
It is another object of the present invention to provide a sensor-equipped sheet that can suppress a decrease in capacitance due to a sheet-like sensor.
It is another object of the present invention to provide a sensor-equipped sheet that can reduce manufacturing costs.
　前記課題は、本発明のセンサ付きシートによれば、クッションパッドに表皮を被覆して構成されるシート本体と、前記クッションパッドと前記表皮の間に配置され、着座者の生体電位に応じた電気信号を検出するシート状センサと、を備え、該シート状センサから検出された前記電気信号に基づいて、前記着座者の生体情報を計測可能なセンサ付きシートであって、前記シート状センサは、前記表皮と対向する所定部分において前記表皮に対し取り付けられていること、により解決される。
　上記構成により、着座者の生体信号をより安定的に検出することが可能なセンサ付きシートを実現することができる。
　具体的には、前記シート状センサが、クッションパッドではなく表皮に対して取り付けられているため、着座者側にある表皮に対しシート状センサの位置がずれてしまうことを抑制することができ、着座者の生体信号を安定的に検出することができる。
　また、シート状センサが予め表皮に対して取り付けられているため、シート本体を組み立てるときには、クッションパッドにシート状センサ付きの表皮を被覆すれば良いので組み立てが容易となり、製造コストを抑制することができる。 According to the sensor-equipped seat of the present invention, the object is to provide a seat body formed by covering a cushion pad with an epidermis, and an electric power disposed between the cushion pad and the epidermis and according to a bioelectric potential of a seated person. A sheet-shaped sensor that detects a signal, based on the electric signal detected from the sheet-shaped sensor, a sensor-equipped seat that can measure the biological information of the seated person, wherein the sheet-shaped sensor, The problem is solved by being attached to the skin at a predetermined portion facing the skin.
With the above configuration, it is possible to realize a sensor-equipped seat capable of more stably detecting a biological signal of a seated person.
Specifically, since the sheet-shaped sensor is attached not to the cushion pad but to the skin, it is possible to suppress the position of the sheet-shaped sensor from being shifted with respect to the skin on the occupant side, The biological signal of the seated person can be stably detected.
In addition, since the sheet-like sensor is attached to the skin in advance, when assembling the seat body, the cushion pad may be covered with the skin with the sheet-like sensor, so that the assembly becomes easy and the manufacturing cost can be reduced. it can.
　このとき、前記表皮は、前記着座者側に設けられ、導電性を有する導電布と、該導電布の裏面に取り付けられるワディング材と、から少なくとも構成され、前記導電布の一端部分には、前記ワディング材を間に挟むように前記着座者側とは反対側に折り返される折り返し部が形成され、前記シート状センサは、前記表皮のうち、前記導電布の前記折り返し部に対し取り付けられていると良い。
　上記構成により、導電布にワディング材を付与しながらも、導電布とシート状センサとが直接接続する構成を実現しているため、導電布のしわの発生を抑制することができ、かつ、シート状センサによる静電容量の低下を抑制することができる。 At this time, the skin is provided on the seated person side, and is at least composed of a conductive cloth having conductivity, and a wading material attached to the back surface of the conductive cloth. A folded portion that is folded back to the side opposite to the seated person side so as to sandwich a wading material therebetween is formed, and the sheet-shaped sensor is attached to the folded portion of the conductive cloth in the skin. good.
With the above-described configuration, a configuration in which the conductive cloth and the sheet-shaped sensor are directly connected to each other is realized while the wadding material is applied to the conductive cloth, so that wrinkles of the conductive cloth can be suppressed, and A decrease in capacitance due to the shape sensor can be suppressed.
　このとき、前記ワディング材の一端部分は、前記折り返し部において前記導電布とともに折り返され、該導電布から張り出さないように配置されていると良い。
　上記構成により、導電布とシート状センサとが直接接続する構成を実現し易くなる。そのため、シート状センサによる静電容量の低下を一層抑制できる。 At this time, it is preferable that one end portion of the wadding material is folded back together with the conductive cloth at the folded portion so as not to protrude from the conductive cloth.
With the above configuration, it is easy to realize a configuration in which the conductive cloth and the sheet-like sensor are directly connected. Therefore, a decrease in capacitance due to the sheet-like sensor can be further suppressed.
　このとき、前記導電布は、前記シート本体において所定方向の一方側に配置される第１導電布と、前記所定方向の他方側に配置される第２導電布と、を有し、前記シート状センサは、前記第１導電布と対向する位置に配置され、該第１導電布に設けられた前記折り返し部に取り付けられる第１シート状センサと、前記第２導電布と対向する位置に配置され、該第２導電布に設けられた前記折り返し部に取り付けられる第２シート状センサと、を有すると良い。
　また、前記導電布は、前記第１導電布、前記第２導電布それぞれの端部同士が取り付けられる布端部取り付け部を有し、該布端部取り付け部が、前記第１シート状センサと前記第２シート状センサの間に配置されていると良い。
　上記構成により、例えば第１シート状センサと第２シート状センサとが異なるセンサであった場合に、センサ同士が相互干渉してしまうことを抑制できる。 At this time, the conductive cloth includes a first conductive cloth disposed on one side in a predetermined direction of the sheet body, and a second conductive cloth disposed on the other side in the predetermined direction. The sensor is disposed at a position facing the first conductive cloth, and is disposed at a position opposite to the first sheet-like sensor attached to the folded portion provided on the first conductive cloth and the second conductive cloth. And a second sheet-like sensor attached to the folded portion provided on the second conductive cloth.
Further, the conductive cloth has a cloth end attaching portion to which ends of the first conductive cloth and the second conductive cloth are attached to each other, and the cloth end attaching portion is provided with the first sheet-like sensor and the first sheet-like sensor. It is good to be arrange | positioned between the said 2nd sheet-shaped sensors.
According to the above configuration, for example, when the first sheet-shaped sensor and the second sheet-shaped sensor are different sensors, it is possible to suppress the sensors from interfering with each other.
　このとき、前記導電布は、ベース布と、該ベース布に取り付けられ、導電性材料からなる導電糸と、から少なくとも構成され、前記第１導電布に設けられた第１導電糸と、前記第２導電布に設けられた第２導電糸とが、互いに所定方向に沿って延びており、かつ、前記所定方向とは交差する方向において互いに異なる位置に配置されていると良い。
　上記構成により、第１導電糸と第２導電糸とが互いに接触しないように配慮されているため、第１導電布と接続される第１シート状センサと、第２導電布と接続される第２シート状センサとが相互干渉することを一層抑制できる。 At this time, the conductive cloth is at least composed of a base cloth and a conductive yarn attached to the base cloth and made of a conductive material, and a first conductive yarn provided on the first conductive cloth; It is preferable that the second conductive yarn provided on the two conductive cloths extend along a predetermined direction and are arranged at different positions in a direction intersecting the predetermined direction.
With the above configuration, since the first conductive yarn and the second conductive yarn are considered so as not to contact each other, the first sheet-like sensor connected to the first conductive cloth and the first sheet-like sensor connected to the second conductive cloth are provided. Mutual interference with the two-sheet sensor can be further suppressed.
　このとき、前記シート状センサは、導電性を有する導電性シートと、該導電性シートの表面に設けられ、導電性材料からなる導電線と、から少なくとも構成され、前記導電性シートのうち前記導電線が設けられていない部分が、前記表皮に対して縫製されていると良い。
　上記構成により、導電性シート上にある導電線に対し直接縫製してしまうことを避けることができるため、導電線の変形等を抑制できる。 At this time, the sheet-shaped sensor is at least constituted by a conductive sheet having conductivity, and a conductive wire provided on a surface of the conductive sheet and made of a conductive material. It is preferable that a portion where no line is provided is sewn to the skin.
According to the above configuration, it is possible to avoid direct sewing on the conductive wire on the conductive sheet, so that deformation or the like of the conductive wire can be suppressed.
　このとき、前記シート状センサは、前記導電性シートの裏面に取り付けられるベースフィルムを有し、該ベースフィルムのうち、前記第１シート状センサに対向する部分と、前記第２シート状センサに対向する部分との間には、シート幅方向に長尺な貫通孔が形成されていると良い。
　上記構成により、シート状センサに対し変形するような力が加わった場合であっても、シート幅方向に長尺な貫通孔を形成しておくことで、シート状センサに撓みを発生させることができ、シート状センサの変形を抑制することができる。
　また、ベースフィルムに長尺な貫通孔を形成することで、シート状センサの保持性を確保しながらも、シート状センサの軽量化を果たすことができる。 At this time, the sheet-shaped sensor has a base film attached to the back surface of the conductive sheet, and a portion of the base film facing the first sheet-shaped sensor and a portion facing the second sheet-shaped sensor. It is preferable that a long through-hole is formed in the width direction of the sheet between the portion to be formed.
With the above configuration, even when a force that deforms the sheet-like sensor is applied, the sheet-like sensor can be bent by forming a long through hole in the sheet width direction. The deformation of the sheet-like sensor can be suppressed.
Further, by forming a long through hole in the base film, it is possible to reduce the weight of the sheet-shaped sensor while securing the holding properties of the sheet-shaped sensor.
　このとき、前記第１シート状センサは、前記着座者の生体電位に応じた電気信号を検出する際の基準電位を規定するアース電極部を構成するためのセンサであって、前記第１シート状センサは、前記第２シート状センサよりもシート幅方向の両側に向かって幅広となるように形成されていると良い。
　上記構成により、アース電極部を構成するセンサが比較的幅広となるため、着座者とアース電極との電気的な接触がより安定し、着座者の生体信号をより安定的に検出できる。 At this time, the first sheet-shaped sensor is a sensor for configuring a ground electrode portion that defines a reference potential when detecting an electric signal according to the bioelectric potential of the seated person, and the first sheet-shaped sensor is The sensor is preferably formed to be wider toward both sides in the sheet width direction than the second sheet-shaped sensor.
According to the above configuration, since the sensor forming the ground electrode portion is relatively wide, the electrical contact between the occupant and the ground electrode is more stable, and the biological signal of the occupant can be more stably detected.
　このとき、前記シート状センサは、前記シート本体のうち、シートクッションに設けられ、前記第１シート状センサは、シート幅方向の左右側方にそれぞれ設けられ、前記シート本体の中央部分を間に挟む位置に配置され、前記第２シート状センサは、シート幅方向の左右側方にそれぞれ設けられ、前記シート本体の中央部分を間に挟む位置に配置されていると良い。
　上記構成により、一対の第１シート状センサ、一対の第２シート状センサが、それぞれ着座者の左右の臀部（坐骨結節部）に接触する位置に配置され易くなるため、着座者の生体信号をより安定的に検出することができる。 At this time, the sheet-shaped sensor is provided on a seat cushion of the seat body, and the first sheet-shaped sensor is provided on each of left and right sides in a seat width direction, and a center portion of the sheet body is interposed therebetween. It is preferable that the second sheet-shaped sensor is disposed at a sandwiching position, and is provided on each of left and right sides in a sheet width direction, and is disposed at a position sandwiching a central portion of the sheet body.
According to the above configuration, the pair of first sheet-shaped sensors and the pair of second sheet-shaped sensors are easily arranged at positions where they come into contact with the left and right hips (sciatic tuberosity) of the seated person. Detection can be performed more stably.
　本発明によれば、着座者の生体信号をより安定的に検出することが可能なセンサ付きシートを実現することができる。また、製造コストを抑制可能なセンサ付きシートを実現できる。
　また本発明によれば、導電布のしわの発生を抑制することができ、かつ、シート状センサによる静電容量の低下を抑制できる。
　また本発明によれば、シート状センサ同士が相互干渉してしまうことを抑制できる。
　また本発明によれば、シート状センサ（導電線）の変形等を抑制できる。
　また本発明によれば、シート状センサの保持性を確保しながらも、シート状センサの軽量化を果たせる。
　また本発明によれば、着座者の生体信号をより安定的に検出できる。 According to the present invention, it is possible to realize a sensor-equipped seat that can more stably detect a biological signal of a seated person. In addition, it is possible to realize a sensor-equipped sheet that can suppress manufacturing costs.
Further, according to the present invention, it is possible to suppress the occurrence of wrinkles of the conductive cloth and to suppress a decrease in capacitance due to the sheet-like sensor.
Further, according to the present invention, it is possible to suppress the sheet-shaped sensors from interfering with each other.
Further, according to the present invention, deformation and the like of the sheet-like sensor (conductive wire) can be suppressed.
Further, according to the present invention, the weight of the sheet-shaped sensor can be reduced while securing the holding property of the sheet-shaped sensor.
Further, according to the present invention, it is possible to more stably detect a biological signal of a seated person.
本実施形態に係るセンサ付きシートの外観斜視図である。It is an appearance perspective view of a sheet with a sensor concerning this embodiment. シートクッションの上面図である。It is a top view of a seat cushion. 図２のＩＩＩ－ＩＩＩ断面図であり、導電布とシート状センサの接続関係を説明する図である。FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, illustrating a connection relationship between a conductive cloth and a sheet-like sensor. センサユニットの上面図である。It is a top view of a sensor unit. 着座者とシート状センサの位置関係を説明する図である。It is a figure explaining the positional relationship of a seated person and a sheet-like sensor. 第２実施形態のセンサユニットの上面図である。It is a top view of the sensor unit of a 2nd embodiment.
　本実施形態は、シート本体においてクッションパッドと表皮の間に配置され、着座者の生体電位に応じた電気信号を検出するシート状センサを備え、シート状センサから検出された電気信号に基づいて着座者の生体情報を計測可能なセンサ付きシートであって、表皮は、導電性を有する導電布と、導電布の裏面に取り付けられるワディング材とから構成され、導電布の一端部分には、ワディング材を間に挟むように着座者側とは反対側に折り返される折り返し部が形成され、シート状センサは、表皮のうち導電布の折り返し部に対し取り付けられていることを特徴とするセンサ付きシートの発明に関するものである。
　なお、センサ付きシートのシートバックに対して着座する側がシート前方側となる。 This embodiment includes a sheet-shaped sensor that is disposed between a cushion pad and an epidermis in a seat body and detects an electric signal according to a bioelectric potential of a seated person, and seats based on the electric signal detected from the sheet-shaped sensor. A sensor-equipped sheet capable of measuring a person's biological information, wherein the skin is made up of a conductive cloth having conductivity and a wadding material attached to the back surface of the conductive cloth. A folded portion that is folded back to the side opposite to the occupant side is formed so that the folded portion of the conductive cloth in the skin is attached to the folded portion of the seat. It relates to the invention.
The side of the sensor-equipped seat with respect to the seat back is the front side of the seat.
　本実施形態のセンサ付きシートＳは、図１に示すように、車両用シートであって、シートクッション１と、シートバック２と、ヘッドレスト３とを備えるシート本体と、シート本体の内部に取り付けられ、シートに着座している着座者の心拍数（生体情報）を計測する心拍計測装置Ｄ（生体情報計測装置）と、から主に構成されている。
　心拍計測装置Ｄは、シートクッション１の内部において後方部分に取り付けられ、着座者の生体電位に応じた電気信号を検出するセンサユニット３０と、シートクッション１の内部において前方部分に取り付けられ、センサユニット３０とケーブル４０を介して接続され、センサユニット３０で検出された電気信号を受信し、当該電気信号を解析することで着座者の心拍数を算出するＥＣＵ（Ｅｌｅｃｔｉｏｎ　Ｃｏｎｔｒｏｌ　Ｕｎｉｔ）５０と、から主に構成されている。 As shown in FIG. 1, the sensor-equipped seat S of the present embodiment is a vehicle seat, and is attached to a seat body including a seat cushion 1, a seat back 2, and a headrest 3, and is mounted inside the seat body. And a heart rate measuring device D (biological information measuring device) for measuring the heart rate (biological information) of the occupant sitting on the seat.
The heart rate measuring device D is attached to a rear portion inside the seat cushion 1 and detects an electric signal according to a bioelectric potential of a seated person. The sensor unit 30 is attached to a front portion inside the seat cushion 1 and a sensor unit. And an electric control unit (ECU) 50 that is connected via a cable 40 and receives an electric signal detected by the sensor unit 30 and analyzes the electric signal to calculate a heart rate of the occupant. Is configured.
　シートクッション１は、図１に示すように、乗員を下方から支持する着座部であって、骨格となる不図示のクッションフレームにクッションパッド１０を載置して表皮２０で被覆されて構成されている。
　シートバック２は、乗員の背中を後方から支持する背もたれ部であって、骨格となる不図示のバックフレームに不図示のクッションパッドを載置して不図示の表皮で被覆されて構成されている。
　ヘッドレスト３は、乗員の頭を後方から支持する頭部であって、芯材となる不図示のヘッドレストピラーに不図示のクッションパッドを載置して不図示の表皮で被覆されて構成されている。 As shown in FIG. 1, the seat cushion 1 is a seating portion that supports an occupant from below, and is configured by placing a cushion pad 10 on a cushion frame (not shown) serving as a skeleton and covering the cushion pad 10 with a skin 20. I have.
The seat back 2 is a backrest portion that supports the occupant's back from behind, and is configured by placing a cushion pad (not shown) on a back frame (not shown) serving as a skeleton and covered with a skin (not shown). .
The headrest 3 is a head that supports the occupant's head from behind, and is configured by placing a cushion pad (not shown) on a headrest pillar (not shown) serving as a core material and covered with a skin (not shown). .
　クッションパッド１０は、発泡ウレタン等からなるパッド部材であって、図２に示すように、クッションパッド１０の表面上のうち、シート幅方向の左右側方部分には、シート前後方向に延びる表皮吊り込み溝１１、１２がそれぞれ形成され、また、シート幅方向の中央部分には、センサユニット３０とＥＣＵ５０とを接続するケーブル４０を挿通させるための貫通孔１３が形成されている。 The cushion pad 10 is a pad member made of urethane foam or the like. As shown in FIG. 2, on the left and right side portions in the seat width direction on the surface of the cushion pad 10, a skin suspension extending in the seat front-rear direction is provided. Each of the grooves 11 and 12 is formed, and a through hole 13 is formed in a central portion in the seat width direction for inserting a cable 40 connecting the sensor unit 30 and the ECU 50.
　表皮２０は、図２、図３に示すように、着座者側に設けられ、導電性を有する導電布２１と、導電布２１の裏面に接着剤や両面テープ等で取り付けられるワディング材２２と、から構成されている。
　導電布２１は、天然繊維や合成繊維からなるベース布２１ａと、ベース布に縫製によって取り付けられ、導電性材料からなる導電糸２１ｂと、から構成されている。
　ワディング材２２は、例えば、ＰＶＣ（ポリ塩化ビニル）フォーム、ＰＰ（ポリプロピレン）フォーム、ＰＥ（ポリエチレン）フォーム等から形成されている。
　表皮２０にワディング材２２を具備することによって、表皮２０を被覆したシートクッション１の着座感が向上し、また、表皮２０の耐久性に影響するしわの発生を抑制できる。 As shown in FIGS. 2 and 3, the skin 20 is provided on the occupant side, and has a conductive cloth 21 having conductivity, and a wadding material 22 attached to the back surface of the conductive cloth 21 with an adhesive or a double-sided tape. It is composed of
The conductive cloth 21 includes a base cloth 21a made of a natural fiber or a synthetic fiber, and a conductive thread 21b attached to the base cloth by sewing and made of a conductive material.
The wadding material 22 is formed of, for example, a PVC (polyvinyl chloride) foam, a PP (polypropylene) foam, a PE (polyethylene) foam, or the like.
By providing the wadding material 22 on the skin 20, the seating feeling of the seat cushion 1 covered with the skin 20 is improved, and wrinkles that affect the durability of the skin 20 can be suppressed.
　表皮２０について詳しく言うと、図２に示すように、シートクッション１のうち、センサユニット３０が配置された部分と対向する部分及び周辺部分には、上記の導電布２１及びワディング材２２から構成される矩形状の糸付き表皮２０ａが取り付けられている。
　一方で、シートクッション１のうち、上記部分及び周辺部分以外の部分には、ベース布２１ａ及びワディング材２２からなる糸なし表皮２０ｂが取り付けられている。
　すなわち、糸なし表皮２０ｂにおいては、ベース布２１ａに導電糸２１ｂが縫製されていないため、導電性を有さない表皮となっている。
　上記構成により、センサユニット３０の静電容量の低下を抑制しながらも、製造コストを抑えることができる。 More specifically, as shown in FIG. 2, in the seat cushion 1, a portion facing the portion where the sensor unit 30 is arranged and a peripheral portion of the seat cushion 1 are formed of the conductive cloth 21 and the wading material 22. A rectangular skin 20a with a thread is attached.
On the other hand, a threadless skin 20b made of a base cloth 21a and a wading material 22 is attached to a portion other than the above-described portion and the peripheral portion of the seat cushion 1.
That is, the threadless skin 20b has no conductivity because the conductive thread 21b is not sewn on the base cloth 21a.
According to the above configuration, it is possible to reduce the manufacturing cost while suppressing a decrease in the capacitance of the sensor unit 30.
　導電布２１は、図２に示すように、シートクッション１の略中央部分に配置される矩形状の第１導電布２１と、第１導電布２１よりもシート後方側に並ぶように配置される矩形状の第２導電布２１と、を有している。
　第１導電布２１に設けられた第１導電糸２１ｂ、第２導電布２１に設けられた第２導電糸２１ｂは、それぞれシート前後方向に沿って破線状に延びており、また、シート幅方向において所定の間隔を空けて複数配置されている。
　また、複数の第１導電糸２１ｂ、複数の第２導電糸２１ｂが、それぞれシート幅方向において互いに異なる位置に配置されている。
　上記構成により、第１導電糸２１ｂと第２導電糸２１ｂとが互いに接触しないように配慮されているため、第１導電布２１と接続される後述の第１シート状センサ３２と、第２導電布２１と接続される後述の第２シート状センサ３３とが相互干渉することを抑制することができる。 As shown in FIG. 2, the conductive cloth 21 is, as shown in FIG. 2, arranged in a substantially rectangular central portion of the seat cushion 1, and is arranged so as to be arranged on the rear side of the seat with respect to the first conductive cloth 21. A second conductive cloth 21 having a rectangular shape.
The first conductive yarn 21b provided on the first conductive cloth 21 and the second conductive yarn 21b provided on the second conductive cloth 21 respectively extend in a dashed line along the front-back direction of the sheet, and extend in the sheet width direction. Are arranged at predetermined intervals.
In addition, the plurality of first conductive yarns 21b and the plurality of second conductive yarns 21b are respectively arranged at different positions in the sheet width direction.
With the above configuration, since the first conductive yarn 21b and the second conductive yarn 21b are considered so as not to contact each other, a first sheet-like sensor 32 described later connected to the first conductive cloth 21 and a second conductive yarn 21b It is possible to suppress mutual interference between the cloth 21 and a second sheet-like sensor 33 to be described later connected thereto.
　糸付き表皮２０ａのシート前後方向の中央部分には、図３に示すように、着座者側とは反対側に折り返される折り返し部２３が形成されている。
　導電布２１の一端部分は、折り返し部２３においてワディング材２２の一端部分を間に挟むように折り返されている。
　ワディング材２２の一端部分は、折り返し部２３において導電布２１とともに折り返され、導電布２１の一端部分から張り出さないように配置されている。 As shown in FIG. 3, a folded portion 23 that is folded back to the side opposite to the occupant side is formed in a central portion of the threaded skin 20a in the front-back direction of the seat.
One end of the conductive cloth 21 is folded at the folded portion 23 so as to sandwich the one end of the wadding material 22 therebetween.
One end of the wading material 22 is folded back together with the conductive cloth 21 at the folded portion 23 so as not to protrude from one end of the conductive cloth 21.
　また、糸付き表皮２０ａのシート前後方向の中央部分には、第１導電布２１、第２導電布２１それぞれの端部同士が縫製で取り付けられる布端部取り付け部２４が形成されている。
　布端部取り付け部２４は、シート幅方向に沿って延びるように形成されている。 At the center of the threaded skin 20a in the front-rear direction of the sheet, a cloth end attachment portion 24 to which the respective ends of the first conductive cloth 21 and the second conductive cloth 21 are attached by sewing is formed.
The cloth edge attachment portion 24 is formed so as to extend along the sheet width direction.
　センサユニット３０は、図２に示すように、クッションパッド１０と表皮２０の間に配置されており、図３、図４に示すように、基材となるベースフィルム３１と、ベースフィルム３１の表面のうち、シート前方部分に取り付けられる左右一対の第１シート状センサ３２と、シート後方部分に取り付けられる左右一対の第２シート状センサ３３と、左右の第２シート状センサの間に取り付けられるバッファ回路３４と、から主に構成されている。 The sensor unit 30 is disposed between the cushion pad 10 and the skin 20 as shown in FIG. 2, and a base film 31 serving as a base material and a surface of the base film 31 as shown in FIGS. Among them, a pair of left and right first sheet-like sensors 32 attached to the front part of the seat, a pair of left and right second sheet-like sensors 33 attached to the rear part of the seat, and a buffer attached between the left and right second sheet-like sensors And a circuit 34.
　ベースフィルム３１は、ＰＥＴ（ポリエチレンテレフタレート）等から形成される矩形状のフィルム基材である。
　ベースフィルム３１の表面上には、左右の第１シート状センサ３２と左右の第２シート状センサ３３の間において左右一対の貫通孔３１ａが形成されている。
　左右の貫通孔３１ａは、それぞれシート幅方向に長尺となるように形成されており、ベースフィルム３１のシート幅方向の中央部分を間に挟むように互いに離間して配置されている。 The base film 31 is a rectangular film base formed of PET (polyethylene terephthalate) or the like.
On the surface of the base film 31, a pair of left and right through holes 31a is formed between the left and right first sheet sensors 32 and the left and right second sheet sensors 33.
The left and right through holes 31a are formed so as to be long in the sheet width direction, and are arranged apart from each other so as to sandwich the central portion of the base film 31 in the sheet width direction.
　第１シート状センサ３２は、図３、図４に示すように、静電容量結合型のセンサであって、着座者の生体電位に応じた電気信号を検出する際の基準電位を規定するアース電極部となるセンサである。
　左右の第１シート状センサ３２は、導電性を有する導電性シート３２ａと、導電性シート３２ａに設けられ、導電性材料からなる導電線３２ｂと、導電性シート３２ａ上に積層され、導電性を有する導電ゴム３２ｃと、導電性シート３２ａ、導電線３２ｂ及び導電ゴム３２ｃの表面上に積層される不図示の誘電体と、から主に構成されている。
　なお、不図示の誘電体は、例えばチタン酸バリウム等の金属インクからなるコーティング層であって、着座者の皮膚とセンサとの間における静電容量を増加させ、センサの検出精度を高めるものである。 As shown in FIGS. 3 and 4, the first sheet-shaped sensor 32 is a capacitive coupling type sensor, and is a ground that defines a reference potential when detecting an electric signal corresponding to a bioelectric potential of a seated person. It is a sensor that becomes an electrode unit.
The left and right first sheet-like sensors 32 are provided on the conductive sheet 32a having conductivity, the conductive sheet 32a, a conductive line 32b made of a conductive material, and laminated on the conductive sheet 32a, and have a conductivity. It mainly comprises a conductive rubber 32c and a conductive sheet 32a, a conductive wire 32b, and a dielectric (not shown) laminated on the surface of the conductive rubber 32c.
The dielectric (not shown) is, for example, a coating layer made of a metal ink such as barium titanate, which increases the capacitance between the occupant's skin and the sensor and increases the detection accuracy of the sensor. is there.
　導電性シート３２ａは、導電性を有するカーボン樹脂製のシートから形成されている。
　導電線３２ｂは、銀などの金属から形成される導線部材であって、導電性シート３２ａに内包されている。
　左右の導電線３２ｂは、それぞれ所定の導線パターンを形成するように延びており、具体的には、シート幅方向に隣り合う２つの矩形体を形成するように延びており、かつ、これら矩形体の対角線上を通るように延びている。言い換えれば、左右の導電線３２ｂは、２箇所以上で交差するように配置されている。
　左右の導電線３２ｂの末端部分は、シート幅方向の中央部分に集約されており、当該集約された末端部分は、シート後方に向かって延びて、バッファ回路３４に設けられた入力端子３４ｂと接続されている。
　導電ゴム３２ｃは、公知なゴム原材料に導電性カーボンブラック等を配合することで形成される矩形状の部材であって、シート幅方向に長尺となるように延びている。
　導電ゴム３２ｃは、導電性シート３２ａ上に置いて導電線３２ｂが設けられた部分とは異なる部分に配置されている。 The conductive sheet 32a is formed from a conductive carbon resin sheet.
The conductive wire 32b is a conductive wire member formed of a metal such as silver, and is included in the conductive sheet 32a.
The left and right conductive lines 32b extend so as to form a predetermined conductor pattern, and more specifically, extend so as to form two rectangular bodies adjacent in the sheet width direction. Extending on a diagonal line of. In other words, the left and right conductive lines 32b are arranged to intersect at two or more locations.
The end portions of the left and right conductive wires 32b are gathered at the central portion in the sheet width direction, and the gathered end portions extend toward the rear of the seat and are connected to the input terminals 34b provided in the buffer circuit 34. Have been.
The conductive rubber 32c is a rectangular member formed by mixing conductive carbon black or the like with a known rubber raw material, and extends so as to be long in the sheet width direction.
The conductive rubber 32c is disposed on the conductive sheet 32a at a portion different from the portion provided with the conductive wire 32b.
　第２シート状センサ３３は、図３、図４に示すように、第１シート状センサ３２とともに、着座者の生体電位に応じた電気信号を検出するセンサである。
　ここで着座者の生体電位は、着座者の心拍（心拍数）に応じて変化するものであるため、結果的に、着座者の心拍に応じた電気信号を検出することになる。 As shown in FIGS. 3 and 4, the second sheet-shaped sensor 33 is a sensor that, together with the first sheet-shaped sensor 32, detects an electric signal corresponding to the bioelectric potential of the occupant.
Here, the bioelectric potential of the occupant changes according to the heart rate (heart rate) of the occupant, and as a result, an electric signal corresponding to the heart rate of the occupant is detected.
　左右の第２シート状センサ３３は、左右の第１シート状センサ３２とほぼ同様の構成となっている。
　左右の導電線３３ｂについては、それぞれ所定の導線パターンを形成するように延びており、具体的には、シート前後方向に隣り合う２つの矩形体を形成するように延びており、かつ、これら矩形体の対角線上及び中央線上を通るように延びている。言い換えれば、左右の導電線３３ｂは、２箇所以上で交差するように配置されている。
　左右の導電線３３ｂの末端部分は、シート幅方向の中央部分に集約され、当該集約された末端部分は、シート幅方向の内側に向かって延びて、バッファ回路３４に設けられた入力端子３４ｂと接続されている。 The left and right second sheet sensors 33 have substantially the same configuration as the left and right first sheet sensors 32.
The left and right conductive lines 33b each extend to form a predetermined conductor pattern, and specifically, extend to form two rectangular bodies that are adjacent to each other in the sheet front-rear direction. It extends diagonally and on the center line of the body. In other words, the left and right conductive lines 33b are arranged to intersect at two or more locations.
The end portions of the left and right conductive lines 33b are gathered at a central portion in the sheet width direction, and the gathered end portions extend inward in the sheet width direction to form input terminals 34b provided in the buffer circuit 34. It is connected.
　左右の第１シート状センサ３２、左右の第２シート状センサ３３は、図４に示すように、それぞれシートクッション１の中央部分を間に挟む位置に配置されている。
　左右の第１シート状センサ３２は、左右の第２シート状センサ３３よりもシート幅方向の両側に向かって幅広となるように形成されており、かつ、左右の貫通孔３１ａよりもシート幅方向の両側に向かって幅広となるように形成されている。
　また、左右の第２シート状センサ３３は、左右の貫通孔３１ａよりもシート幅方向において幅狭となるように形成されている。 As shown in FIG. 4, the left and right first sheet-like sensors 32 and the left and right second sheet-like sensors 33 are respectively arranged at positions sandwiching the central portion of the seat cushion 1.
The left and right first sheet-like sensors 32 are formed to be wider toward both sides in the sheet width direction than the left and right second sheet-like sensors 33, and are also wider in the sheet width direction than the left and right through holes 31a. Are formed so as to become wider toward both sides of the.
The left and right second sheet-like sensors 33 are formed to be narrower in the sheet width direction than the left and right through holes 31a.
　バッファ回路３４は、図４に示すように、シート状センサ３２，３３と、ＥＣＵ５０との間を中継する電気回路であって、詳しく言うと、シート状センサ３２，３３からの電気信号を増幅し、増幅後の信号をＥＣＵ５０に向けて出力するものである。
　バッファ回路３４は、ベースとなる矩形状の回路基板３４ａと、回路基板３４ａ上に取り付けられ、シート状センサ３２，３３側と接続される入力端子３４ｂと、ＥＣＵ５０側にあるケーブル４０と接続される入力端子３４ｃと、を有している。 As shown in FIG. 4, the buffer circuit 34 is an electric circuit that relays between the sheet sensors 32 and 33 and the ECU 50. More specifically, the buffer circuit 34 amplifies electric signals from the sheet sensors 32 and 33. , And outputs the amplified signal to the ECU 50.
The buffer circuit 34 is connected to a rectangular circuit board 34a serving as a base, an input terminal 34b mounted on the circuit board 34a and connected to the sheet sensors 32 and 33, and a cable 40 provided on the ECU 50 side. And an input terminal 34c.
　上記において、センサユニット３０は、図３に示すように、表皮２０（糸付き表皮２０ａ）の折り返し部２３に対し縫製によって取り付けられている。
　詳しく言うと、第１シート状センサ３２、第２シート状センサ３３は、糸付き表皮２０ａのうち、それぞれ第１導電布２１、第２導電布２１と対向する位置に配置されており、また、それぞれ第１導電布２１の折り返し部２３、第２導電布２１の折り返し部２３に対し取り付けられている。
　そのため、導電布２１にワディング材２２を付与しながらも、導電布２１とシート状センサ３２，３３とが直接接続する構成となるため、導電布２１のしわの発生を抑制でき、かつ、シート状センサ３２，３３による静電容量の低下を抑制できる。 In the above, as shown in FIG. 3, the sensor unit 30 is attached by sewing to the folded portion 23 of the skin 20 (the threaded skin 20a).
More specifically, the first sheet-like sensor 32 and the second sheet-like sensor 33 are arranged at positions facing the first conductive cloth 21 and the second conductive cloth 21, respectively, in the threaded skin 20a. Each is attached to the folded portion 23 of the first conductive cloth 21 and the folded portion 23 of the second conductive cloth 21.
Therefore, while the wadding material 22 is applied to the conductive cloth 21, the conductive cloth 21 is directly connected to the sheet- like sensors 32 and 33, so that wrinkles of the conductive cloth 21 can be suppressed, and the sheet-like sensor can be formed. A decrease in capacitance due to the sensors 32 and 33 can be suppressed.
　また上記において、図３に示すように、シート状センサ３２，３３の導電性シート３２ａ，３３ａのうち、導電線３２ｂ，３３ｂが設けられていない部分、すなわち導電ゴム３２ｃ，３３ｃが設けられた部分が、表皮２０に対して縫製されている。
　詳しく言うと、導電ゴム３２ｃ，３３ｃが、導電性シート３２ａ，３３ａとともに表皮２０に対して縫製されている。
　そのため、導電性シート３２ａ，３３ａ上にある導電線３２ｂ，３３ｂに対し直接縫製してしまうことを避けられるため、導電線３２ｂ，３３ｂの変形等を抑制できる。
　また、導電ゴム３２ｃ，３３ｃを具備しているため、縫製の取り付け強度を向上させるとともに、センサの検出感度を向上させることができる。 In the above description, as shown in FIG. 3, a portion of the conductive sheets 32 a, 33 a of the sheet sensors 32, 33 where the conductive wires 32 b, 33 b are not provided, that is, a portion where the conductive rubbers 32 c, 33 c are provided. Are sewn to the epidermis 20.
More specifically, conductive rubbers 32c and 33c are sewn to the skin 20 together with the conductive sheets 32a and 33a.
Therefore, since it is possible to avoid direct sewing on the conductive lines 32b and 33b on the conductive sheets 32a and 33a, deformation of the conductive lines 32b and 33b can be suppressed.
In addition, since the conductive rubbers 32c and 33c are provided, the sewing attachment strength can be improved, and the detection sensitivity of the sensor can be improved.
　また上記において、図３に示すように、布端部取り付け部２４が、第１シート状センサ３２と第２シート状センサ３３の間にある貫通孔３１ａに配置されている。
　そのため、第１シート状センサ３２と第２シート状センサ３３同士が、相互干渉してしまうことを抑制できる。 In the above description, as shown in FIG. 3, the cloth end attachment portion 24 is disposed in the through hole 31 a between the first sheet-like sensor 32 and the second sheet-like sensor 33.
Therefore, the first sheet sensor 32 and the second sheet sensor 33 can be prevented from interfering with each other.
　また上記において、図４に示すように、第１シート状センサ３２、第２シート状センサ３３は、それぞれシート幅方向の左右側方に設けられ、シート本体の中央部分を間に挟む位置に配置されている。
　そのため、図５に示すように、これらシート状センサ３２，３３が、着座者の左右の臀部（坐骨結節部）に接触し易い位置に配置されることとなり、着座者の生体信号をより安定的に検出できる。
　また、これらシート状センサ３２，３３がシート本体の中央部を避けて配置されているため、例えばシートクッション１の柔らかさによっては、シートクッション１において着座者の左右の臀部の中央部に対向する位置が非接触範囲となってしまうところ、当該非接触範囲を避けてセンサを配置することができ、センサの検出感度を向上できる。 In the above description, as shown in FIG. 4, the first sheet-like sensor 32 and the second sheet-like sensor 33 are respectively provided on the left and right sides in the sheet width direction, and are arranged at positions sandwiching the central portion of the sheet body. Have been.
Therefore, as shown in FIG. 5, these sheet- like sensors 32 and 33 are arranged at positions where the left and right buttocks (sciatic tuberosity) of the seated person are easily contacted, and the biological signal of the seated person is more stably transmitted. Can be detected.
Further, since the sheet- like sensors 32 and 33 are arranged so as to avoid the central portion of the seat body, depending on the softness of the seat cushion 1, for example, the seat cushion 1 faces the central portion of the left and right hips of the seated person. Where the position is in the non-contact range, the sensor can be arranged avoiding the non-contact range, and the detection sensitivity of the sensor can be improved.
　ケーブル４０は、図１に示すように、センサユニット３０とＥＣＵ５０とを接続する公知なケーブル部材である。
　詳しく言うと、ケーブル４０は、センサユニット３０のシート後方部分からシート下方に屈曲して延びてクッションパッド１０の貫通孔１３を通過し、さらにシート前方に屈曲して不図示のクッションフレームの底面に沿って延びて、ＥＣＵ５０と接続されている。 The cable 40 is a known cable member that connects the sensor unit 30 and the ECU 50, as shown in FIG.
More specifically, the cable 40 bends and extends downward from the rear part of the seat of the sensor unit 30 to pass through the through hole 13 of the cushion pad 10, and further bends forward of the seat so as to be bent at the bottom of the cushion frame (not shown). And is connected to the ECU 50.
　ＥＣＵ５０は、図１に示すように、心拍計測装置Ｄの制御部分であって、シートクッション１の不図示のクッションフレームの底面に取り付けられている。
　ＥＣＵ５０は、センサユニット３０で検出された電気信号を解析することで着座者の心拍数を算出する。
　なお、センサユニット３０からの電気信号に基づいて心拍数を算出する具体的な方法については、公知の算出方法（例えば、特開２０１５－１２３３５９号公報に記載の算出方法）が利用可能であって、具体的な説明については省略する。 As shown in FIG. 1, the ECU 50 is a control part of the heart rate measuring device D, and is attached to a bottom surface of a cushion frame (not shown) of the seat cushion 1.
The ECU 50 calculates the heart rate of the occupant by analyzing the electric signal detected by the sensor unit 30.
As a specific method of calculating the heart rate based on the electric signal from the sensor unit 30, a known calculation method (for example, a calculation method described in JP-A-2015-123359) can be used. The detailed description is omitted.
　　＜センサユニットの第２実施形態＞
　次に、第２実施形態となるセンサユニット１３０について、図６に基づいて説明する。
　なお、以下の説明において、センサユニット３０と重複する内容は説明を省略する。
　センサユニット１３０では、センサユニット３０と比較して、貫通孔１３１ａの形状が異なっている。
　左右の貫通孔１３１ａは、略Ｌ字形状からなり、それぞれシート幅方向に長尺となるように形成されている。
　また左右の貫通孔１３１ａのうち、シート幅方向の内側部分がシート幅方向の外側部分よりもシート前後方向において幅広となるように形成されている。
　言い換えれば、左右の貫通孔１３１ａは、左右のシート状センサ１３２，１３３の間に挟まれており、かつ、左右のシート状センサ１３２，１３３の外縁に沿わせた形状を有している。
　上記構成により、ベースフィルム１３１に対するシート状センサ１３２，１３３の保持性を確保しながらも、センサユニット１３０の軽量化を果たせる。 <Second embodiment of sensor unit>
Next, a sensor unit 130 according to a second embodiment will be described with reference to FIG.
In the following description, the description of the same contents as those of the sensor unit 30 will be omitted.
In the sensor unit 130, the shape of the through-hole 131a is different from that of the sensor unit 30.
The left and right through holes 131a have a substantially L-shape, and are formed to be long in the sheet width direction.
Further, of the left and right through holes 131a, the inner portion in the sheet width direction is formed to be wider in the sheet front-rear direction than the outer portion in the sheet width direction.
In other words, the left and right through holes 131a are sandwiched between the left and right sheet sensors 132, 133 and have a shape along the outer edges of the left and right sheet sensors 132, 133.
With the above configuration, the weight of the sensor unit 130 can be reduced while securing the holding properties of the sheet- like sensors 132 and 133 with respect to the base film 131.
　　＜その他の実施形態＞
　上記実施形態では、図１に示すように、シート状センサ３２，３３がシートクッション１の内部に取り付けられているが、特に限定されることなく変更可能であって、シートバック２の内部に取り付けられていても良いし、ヘッドレスト３の内部に取り付けられていても良い。 <Other embodiments>
In the above embodiment, as shown in FIG. 1, the sheet sensors 32 and 33 are mounted inside the seat cushion 1, but can be changed without any particular limitation, and can be mounted inside the seat back 2. Or it may be mounted inside the headrest 3.
　上記実施形態では、図１に示すように、センサ付きシートＳが、シートに着座している着座者の心拍数を計測する心拍計測装置Ｄを備えているが、特に限定されることなく、心拍数以外の生体情報、例えば心電図や血圧、体温、呼吸といった生体情報を計測する生体情報計測装置を代わりに備えていても良い。 In the above embodiment, as shown in FIG. 1, the sensor-equipped seat S includes the heart rate measuring device D that measures the heart rate of the occupant seated on the seat, but is not particularly limited. A biological information measuring device for measuring biological information other than the number, for example, electrocardiogram, blood pressure, body temperature, respiration, etc., may be provided instead.
　上記実施形態では、具体例として自動車に用いられる車両用シートについて説明したが、これに限定されることなく、電車、バス等の車両用シート、飛行機、船等の乗り物用シートのほか、作業用の事務椅子としても利用することができる。 In the above-described embodiment, the vehicle seat used for an automobile has been described as a specific example.However, without being limited to this, a vehicle seat such as a train, a bus, an airplane, a vehicle seat such as a ship, and a work seat It can also be used as an office chair.
　本実施形態では、主として本発明に係るセンサ付きシートに関して説明した。
　ただし、上記の実施形態は、本発明の理解を容易にするための一例に過ぎず、本発明を限定するものではない。本発明は、その趣旨を逸脱することなく、変更、改良され得ると共に、本発明にはその等価物が含まれることは勿論である。
　特に、表皮、シート状センサの配置や構成について、上記の実施形態にて説明したものは、あくまで一例に過ぎず、本発明を限定するものではない。 In the present embodiment, the sensor-equipped sheet according to the present invention has been mainly described.
However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the gist of the present invention, and the present invention naturally includes equivalents thereof.
In particular, the arrangement and configuration of the skin and sheet-like sensors described in the above embodiment are merely examples, and do not limit the present invention.
Ｓ　センサ付きシート
１　シートクッション
２　シートバック
３　ヘッドレスト
１０　クッションパッド
１１，１２　表皮吊り込み溝
１３　貫通孔
２０　表皮
　２０ａ　糸付き表皮
　２０ｂ　糸なし表皮
２１　導電布（第１導電布，第２導電布）
　２１ａ　ベース布
　２１ｂ　導電糸（第１導電糸，第２導電糸）
２２　ワディング材
２３　折り返し部
２４　布端部取り付け部
Ｄ　心拍計測装置（生体情報計測装置）
３０，１３０　センサユニット
３１，１３１　ベースフィルム
　３１ａ，１３１ａ　貫通孔
３２，１３２　第１シート状センサ
　３２ａ，３３ａ　導電性シート
　３２ｂ，３３ｂ　導電線
　３２ｃ，３３ｃ　導電ゴム
３３，１３３　第２シート状センサ
３４　バッファ回路
　３４ａ　回路基板
　３４ｂ，３４ｃ　入力端子
４０　ケーブル
５０　ＥＣＵ S Sensor-equipped seat 1 Seat cushion 2 Seat back 3 Headrest 10 Cushion pad 11, 12 Skin hanging groove 13 Through hole 20 Skin 20a Threaded skin 20b Threadless skin 21 Conductive cloth (first conductive cloth, second conductive cloth)
21a Base cloth 21b Conductive yarn (first conductive yarn, second conductive yarn)
22 Wadding material 23 Folding part 24 Cloth end attaching part D Heart rate measuring device (biological information measuring device)
30, 130 Sensor unit 31, 131 Base film 31a, 131a Through hole 32, 132 First sheet- like sensor 32a, 33a Conductive sheet 32b, 33b Conductive wire 32c, 33c Conductive rubber 33, 133 Second sheet-like sensor 34 Buffer circuit 34a circuit board 34b, 34c input terminal 40 cable 50 ECU

Claims (10)

  1. 　クッションパッドに表皮を被覆して構成されるシート本体と、
    　前記クッションパッドと前記表皮の間に配置され、着座者の生体電位に応じた電気信号を検出するシート状センサと、を備え、
    　該シート状センサから検出された前記電気信号に基づいて、前記着座者の生体情報を計測可能なセンサ付きシートであって、
    　前記シート状センサは、前記表皮と対向する所定部分において前記表皮に対し取り付けられていることを特徴とするセンサ付きシート。     A seat body composed of a cushion pad covered with a skin,
    A sheet-like sensor that is disposed between the cushion pad and the epidermis and detects an electric signal according to a bioelectric potential of a seated person,
    A sensor-equipped seat capable of measuring biological information of the seated person based on the electric signal detected from the sheet-shaped sensor,
    The sheet with the sensor, wherein the sheet-like sensor is attached to the skin at a predetermined portion facing the skin.
  2. 　前記表皮は、前記着座者側に設けられ、導電性を有する導電布と、該導電布の裏面に取り付けられるワディング材と、から少なくとも構成され、
    　前記導電布の一端部分には、前記ワディング材を間に挟むように前記着座者側とは反対側に折り返される折り返し部が形成され、
    　前記シート状センサは、前記表皮のうち、前記導電布の前記折り返し部に対し取り付けられていることを特徴とする請求項１に記載のセンサ付きシート。     The skin is provided on the occupant side, a conductive cloth having conductivity, and a wading material attached to the back surface of the conductive cloth, at least configured,
    At one end portion of the conductive cloth, a folded portion that is folded back to the opposite side to the seated person side so as to sandwich the wadding material therebetween is formed,
    The sensor-equipped sheet according to claim 1, wherein the sheet-shaped sensor is attached to the folded portion of the conductive cloth in the skin.
  3. 　前記ワディング材の一端部分は、前記折り返し部において前記導電布とともに折り返され、該導電布から張り出さないように配置されていることを特徴とする請求項２に記載のセンサ付きシート。 3. The sensor-equipped sheet according to claim 2, wherein one end portion of the wadding material is folded back together with the conductive cloth at the folded portion so as not to protrude from the conductive cloth. 4.
  4. 　前記導電布は、前記シート本体において所定方向の一方側に配置される第１導電布と、前記所定方向の他方側に配置される第２導電布と、を有し、
    　前記シート状センサは、
    　前記第１導電布と対向する位置に配置され、該第１導電布に設けられた前記折り返し部に取り付けられる第１シート状センサと、
    　前記第２導電布と対向する位置に配置され、該第２導電布に設けられた前記折り返し部に取り付けられる第２シート状センサと、を有することを特徴とする請求項３に記載のセンサ付きシート。     The conductive cloth has a first conductive cloth disposed on one side in a predetermined direction in the sheet body, and a second conductive cloth disposed on the other side in the predetermined direction,
    The sheet-like sensor,
    A first sheet-shaped sensor arranged at a position facing the first conductive cloth and attached to the folded portion provided on the first conductive cloth;
    The sensor according to claim 3, further comprising: a second sheet-shaped sensor disposed at a position facing the second conductive cloth and attached to the folded portion provided on the second conductive cloth. Sheet.
  5. 　前記導電布は、前記第１導電布、前記第２導電布それぞれの端部同士が取り付けられる布端部取り付け部を有し、
    　該布端部取り付け部が、前記第１シート状センサと前記第２シート状センサの間に配置されていることを特徴とする請求項４に記載のセンサ付きシート。     The conductive cloth has a cloth end attaching portion to which ends of the first conductive cloth and the second conductive cloth are attached to each other,
    5. The sensor-equipped sheet according to claim 4, wherein the cloth end attachment portion is disposed between the first sheet-shaped sensor and the second sheet-shaped sensor. 6.
  6. 　前記導電布は、ベース布と、該ベース布に取り付けられ、導電性材料からなる導電糸と、から少なくとも構成され、
    　前記第１導電布に設けられた第１導電糸と、前記第２導電布に設けられた第２導電糸とが、互いに所定方向に沿って延びており、かつ、前記所定方向とは交差する方向において互いに異なる位置に配置されていることを特徴とする請求項４に記載のセンサ付きシート。     The conductive cloth is at least composed of a base cloth and a conductive yarn attached to the base cloth and made of a conductive material,
    The first conductive yarn provided on the first conductive cloth and the second conductive yarn provided on the second conductive cloth extend along a predetermined direction, and intersect with the predetermined direction. The sensor-equipped sheet according to claim 4, wherein the sensor-equipped sheets are arranged at positions different from each other in the direction.
  7. 　前記シート状センサは、導電性を有する導電性シートと、該導電性シートの表面に設けられ、導電性材料からなる導電線と、から少なくとも構成され、
    　前記導電性シートのうち前記導電線が設けられていない部分が、前記表皮に対して縫製されていることを特徴とする請求項４に記載のセンサ付きシート。     The sheet-shaped sensor is at least configured by a conductive sheet having conductivity, and a conductive wire provided on a surface of the conductive sheet and made of a conductive material,
    The sensor-equipped sheet according to claim 4, wherein a portion of the conductive sheet where the conductive wire is not provided is sewn to the skin.
  8. 　前記シート状センサは、前記導電性シートの裏面に取り付けられるベースフィルムを有し、
    　該ベースフィルムのうち、前記第１シート状センサに対向する部分と、前記第２シート状センサに対向する部分との間には、シート幅方向に長尺な貫通孔が形成されていることを特徴とする請求項７に記載のセンサ付きシート。     The sheet-shaped sensor has a base film attached to the back surface of the conductive sheet,
    In the base film, between the portion facing the first sheet-like sensor and the portion facing the second sheet-like sensor, a long through hole is formed in the sheet width direction. The sensor-equipped sheet according to claim 7, wherein:
  9. 　前記第１シート状センサは、前記着座者の生体電位に応じた電気信号を検出する際の基準電位を規定するアース電極部を構成するためのセンサであって、
    　前記第１シート状センサは、前記第２シート状センサよりもシート幅方向の両側に向かって幅広となるように形成されていることを特徴とする請求項５に記載のセンサ付きシート。     The first sheet-shaped sensor is a sensor for configuring a ground electrode portion that defines a reference potential when detecting an electric signal corresponding to the bioelectric potential of the seated person,
    The sensor-equipped sheet according to claim 5, wherein the first sheet-like sensor is formed to be wider toward both sides in the sheet width direction than the second sheet-like sensor.
  10. 　前記シート状センサは、前記シート本体のうち、シートクッションに設けられ、
    　前記第１シート状センサは、シート幅方向の左右側方にそれぞれ設けられ、前記シート本体の中央部分を間に挟む位置に配置され、
    　前記第２シート状センサは、シート幅方向の左右側方にそれぞれ設けられ、前記シート本体の中央部分を間に挟む位置に配置されていることを特徴とする請求項５に記載のセンサ付きシート。     The sheet-shaped sensor is provided on a seat cushion of the seat body,
    The first sheet-like sensor is provided on each of the left and right sides in the sheet width direction, and is disposed at a position sandwiching a central portion of the sheet body,
    The sensor-equipped sheet according to claim 5, wherein the second sheet-shaped sensors are provided on left and right sides in a sheet width direction, respectively, and are arranged at positions sandwiching a central portion of the sheet body. .
PCT/JP2019/032793 2018-08-23 2019-08-22 Sensor-equipped seat WO2020040248A1 (en)

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