Air valve, electronic blood pressure monitor, and air massager

摘要

An air valve comprising: an inflow opening through which air flows in; an outflow opening through which the entered air flows out; and an actuator having an elastomer or polymer that can expand and contract when supplied with a voltage and an electrode for applying a voltage on the elastomer or polymer, wherein an outflow route from the inflow opening to the outflow opening is opened and closed by driving the actuator.