Fingertip pulse wave sensor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 10, 1990
Grant Date -
N/A
app pub date -
Mar 28, 1989
filing date -
Jul 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fingertip pulse wave sensor includes a fingertip supporting base having either a nail supporting surface or a fingertip cushion supporting surface, and a slider having the other of the nail supporting surface and the fingertip cushion supporting surface. The slider is guided on the fingertip supporting base in such a manner as to be slidable in the direction in which it is moved away from or toward the fingertip supporting base. The slider is urged in the direction in which it is moved toward the fingertip supporting base by an elastic body which is capable of applying a substantially fixed amount of pressure with respect to the variations in the slide stroke in the direction in which the slider is moved away from the fingertip supporting base which occur when different fingertips are set. The fingertip pulse wave sensor also includes a light-emitting element disposed in one of the nail supporting surfaces and the fingertip cushion supporting surface, and a light-receiving element disposed on the other of the nail supporting surface and the fingertip cushion supporting surface.
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