Patent ID: 9468388
Filing Date: 2016-10-18
CPC Classification: A61B

Claim Text:
1. An electrocardiographic waveform measuring apparatus mounted in a seat having a seat skin element, which provides a contact surface with a user, the electrocardiographic waveform measuring apparatus comprising: a sensor electrode disposed at a seat interior side of the seat as a back side of the contact surface so that the sensor electrode is covered with the seat skin element; an insulating elastic element disposed at the seat interior side of the sensor electrode in the seat opposite to the seat skin element so that the insulating elastic element faces the sensor electrode, and the insulating elastic element has a thickness larger than a thickness of the seat skin element; a guard electrode disposed at the seat interior side of the insulating elastic element in the seat opposite to the sensor electrode so that the guard electrode is opposed to the sensor electrode through the insulating elastic element; and a housing case disposed at the seat interior side of the insulating elastic element in the seat opposite to the sensor electrode so that the housing case is opposite to the insulating elastic element, the housing case accommodating a sensor circuit with at least an amplifier circuit, to which a potential signal indicating a potential of the sensor electrode is initially input.