Bioinformation measurement device

Abstract

Bioinformation of a seated person is more accurately measured. A heartbeat measurement device for measuring heartbeat of a person seated on a vehicle seat has heartbeat sensors and a circuit substrate: the heartbeat sensors have leading wires which output electric signals corresponding to a heartbeat and constitute a transmission path for the electric signals; and the circuit substrate has input terminals which receives the electric signals output from the heartbeat sensors, and a differential amplifier which amplifies the electric signals input to the input terminals. The heartbeat sensors and the circuit substrate are disposed in positions adjacent to each other in the vehicle seat, and terminal portions of the leading wires come out from portions adjacent to the circuit board of the heartbeat sensors are connected to the input terminals in a state abutting the input terminals.

1 . A bioinformation measurement device for measuring a bioinformation of a seated person who is seated on a seat, comprising:
 a sensor which outputs an electric signal according to the bioinformation, and comprises a leading wire constituting a transmission path for the electric signal, and   a circuit substrate comprising an input terminal provided to receive the electric signal from the sensor, and an amplification unit which amplifies the electric signal input to the input terminal, wherein   the sensor and the circuit substrate are disposed in positions adjacent to each other in the seat, and   in the sensor, a terminal portion of the leading wire come out from a portion adjacent to the circuit substrate is connected to the input terminal in a state abutting the input terminal.   
     
     
         2 . The bioinformation measurement device according to  claim 1 , wherein the circuit substrate is attached to the seat so as to be positioned in the width direction center of the seat. 
     
     
         3 . The bioinformation measurement device according to  claim 1 , comprising a plural number of the sensor, wherein
 the plural number of the sensor are arranged across a gap in the width direction of the seat, and   the circuit substrate is disposed within the gap in a state sandwiched between the sensors.   
     
     
         4 . The bioinformation measurement device according to  claim 1 , comprising a guard ring disposed in a manner surrounding the sensor, wherein
 the sensor is disposed on a face, which come in contact with the seated person, of the seat, and   the sensor, the guard ring, and the circuit substrate are disposed in a state arranged along the width direction of the seat.   
     
     
         5 . The bioinformation measurement device according to  claim 2 , wherein the circuit substrate is attached so as to be positioned in the width direction center of a seatback provided to the seat. 
     
     
         6 . The bioinformation measurement device according to  claim 2 , wherein the circuit substrate is attached so as to be positioned in the width direction center of a seat cushion provided to the seat. 
     
     
         7 . The bioinformation measurement device according to  claim 1 , wherein
 the sensor and the circuit substrate are attached individually to the seat cushion and the seatback provided to the seat, and   a range where the circuit substrate attached to the seat cushion is present in the seat width direction, and a range where the circuit substrate attached to the seatback is present, overlap with each other in the width direction.