| 摘要 |
PROBLEM TO BE SOLVED: To provide a shape memory alloy actuator whose operating speed is fast by preventing any external force from directly acting through an operation edge on a shape memory alloy even when any force acts on the operation edge from the outside part. SOLUTION: When a shape recovery force is generated, an intermediate member 3 is moved to first and second intermediate member stabilizing positions by linking first and second shape memory alloys 14a and 14b to the intermediate member 3. An energizing means 12 for inversion for energizing the prescribed part of an operation edge member 7 and the prescribed part of the intermediate member 3 for making them close to each other or away from each other energizes the operation edge member 7 to any opposite direction at either a first operation edge member stabilizing position side or a second operation edge member stabilizing position side according to whether the intermediate member 3 is present at the first intermediate member stabilizing position side or second intermediate member stabilizing position of a neutral position.
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