Importance

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Abstract

The invention relates to a cuff for a sphygmomanometer, which is able to judge the maximum blood pressure and minimum blood pressure at a high accuracy. The cuff 10 comprises a bendably deformable hard curved plate 10a, an outside cloth 10b which surrounds the outer periphery of said curved plate 10a, an inside cloth 10c sewed to the outside cloth 10b so that the same surrounds the inner periphery of said curved plate 10a, an air bag 10d secured inside the inside cloth 10c, and an engaging fastener 10e sewed to the outer periphery of the outside cloth 10b. The air bag 10d is composed of a transparent bag member 10g in which reinforcing fabric 10f is incorporated in a latticed state. Each optical range sensor 12 is composed of a photocoupler 12a fixed at the outside of the bag member 10g and a reflection plate 12b fixed at the inside of the bag member 10g so as to be opposite to the photocoupler 12a. The photocoupler 12a has a light emitting diode and a phototransistor, whereby light emitted by the light emitting diode is reflected by the reflection plate 12b and is made incident into the phototransistor, and the output of the phototransistor may change in accordance with the distance between the photocoupler 12a and the reflection plate 12b.

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First Claim