PROBLEM TO BE SOLVED: To enable a subject to continuously measure his or her heartbeat in a daily movement, without causing him or her to take time and efforts for wearing a heartbeat meter and without causing him or her to feel troublesomeness while wearing it.SOLUTION: A heartbeat measuring system includes: an oral cavity electrode provided to a head part of a toothbrush where brush bristles are planted, the oral cavity electrode being brought into contact with a portion in the oral cavity of a subject a hand electrode provided to a grip part of the toothbrush, the hand electrode being brought into contact with a hand of the subject and a detection part for detecting a heartbeat of the subject. The detection part derives a potential difference between the portion in the oral cavity and the hand by a signal from the oral cavity electrode and a signal from the hand electrode, and acquires heartbeat data on the subject based on the derived potential difference.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】被験者が装着する手間や装着中の煩わしさを感じることなく、日常動作の中で被験者の心拍を継続的に計測することができる。【解決手段】心拍計測システムは、歯ブラシにおけるブラシ毛が植設されたヘッド部に設けられ、被験者の口腔内部位に接触させるための口腔内電極と、歯ブラシにおける把持部に設けられ、被験者の手に接触させるための手電極と、被験者の心拍を検出する検出部と、を備え、検出部は、口腔内電極からの信号および手電極からの信号により、口腔内部位と手との電位差を導出し、導出した当該電位差に基づいて被験者の心拍データを取得するものである。【選択図】図1
