| 摘要 |
A continuous rotary actuator using a shape memory alloy has a simple structure, is small and light-weight, and has a high torque, which can lock the actuator against rotation during periods when the actuator is not energized. The continuous rotary actuator includes an inner drum rotating around an axis constituted by a rotating shaft. The inner drum is provided in an outer cylinder, wherein first and second shape memory alloy torsion springs, which are wound in opposite directions and which are unwound to recoil when electrically heated, are fixed between the outer cylinder and the inner drum, and wherein switching means for alternately switching the electrical heating according to the rotation angle of the inner drum are connected to the first and second shape memory alloy torsion springs.
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