BIOLOGICAL INFORMATION MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To easily remove variation of the internal pressure of high frequency caused not by pulse but by noise in measuring the pulse by a simple mechanical structure, and to improve the precision in measuring the pulse.

SOLUTION: A wristwatch 100 consists of a pulse detecting part 3 for detecting the pulse and a band member 4 for attaching a case body 2 with the pulse detecting part to a wrist R. The pulse detecting part comprises a first medium chamber 34 filled with silicone oil with higher viscosity than air for converting the tension variation caused by the pulsation of an artery around the wrist transmitted via the band member to the internal pressure variation, a second medium chamber 35 filled with silicone oil to which the internal pressure variation in the first medium chamber is transmitted via a hole part 36a, and a metal plate 37 and a piezoelectric element 38 mounted in the second medium chamber for detecting the pulse based on the internal pressure variation in the second medium chamber.

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