| 摘要 |
PURPOSE:To increase the available range by providing a conductive layer divided into a plurality on the surface of a shape memory cell, and independently supplying currents thereto, thereby increasing the output. CONSTITUTION:An actuator 10 is composed of a supporting mechanism 11, a shape memory cell 12 secured to the mechanism, 1 transmitting mechanism 13 for transmitting the opening regulator of a valve Z for the mechanical displacement of the movable end side of the cell, and a current supply unit 14 for heating the cell 12 by Joule heat. After the element 12 is linearly stored in the shape, it has a strip alloy plate 24 formed in an arcuate shape. In this case, conductive layers 25-27 are coated longitudinally at three positions on one surface of the plate 24, conductive layers 28, 29 are coated on both end faces, and the layers 25-29 are energized from the unit 14. Thus, one zone partitioned by the layers 25-29 is selectively energized to partly recover the shape in the cell 12, thereby stepwisely controlling finely the operation amount. |
