Abstract: A medical capsule device comprises a capsule body having a chamber formed inside and a communicating path for communicating the chamber with outside, a movable member arranged in the chamber and movable between a liquid-receiving position at which the volume of said chamber is made largest and a liquid-pushing position at which the volume of said chamber is made smallest, and a coiled operating member made of shape memory alloy heated by ultrasonic wave to move the movable member to liquid-receiving and -pushing positions selectively.

Abstract: A medical capsule device includes a capsule body provided with a chamber inside and a communicating path for communicating the chamber with the outside, a movable member arranged in the chamber and movable between a liquid-pushing position at which the volume of the chamber is made smallest and a liquid-receiving position at which the volume of the chamber is made largest, a coiled operating member made of a shape memory alloy for selectively moving the movable member to the liquid-receiving or -pushing position according to temperature changes of the operating member itself, and a switching circuit and power supply source arranged in the capsule body and adjusting the temperature of the operating member to selectively move the movable member to the liquid-pushing or -receiving position.