PROBLEM TO BE SOLVED: To provide a displacement mechanism which can obtain a large curved angle utilizing shape-memory alloy wires with small displacement.SOLUTION: The mechanism includes a first pipe having a first fixing part and a first connection part, a second pipe having a second fixing part and a second connection part, a shape-memory member firmly fixed to the first fixing part and the second fixing part, and a connection member to connect the first connection part with the second connection part mechanically. The first pipe and the second pipe rotate around a first connection part and second connection part respectively. A prescribed formula: LD1>LD2 is satisfied, where a distance between the first connection part and the second connection part is LD1, and the maximum value of the distance between the center of the first fixing part and the center of the second fixing part is LD0.COPYRIGHT: (C)2013,JPO&INPIT【課題】形状記憶合金ワイヤの少ない変位を活用して大きな湾曲角度を得ることのできる変位機構を提供する。【解決手段】第1固定部及び第1連結部を有する第1の管と、第2固定部及び第2連結部を有する第2の管と、第1固定部及び第2固定部に固着された形状記憶部材と、第1連結部と第2連結部を機械的につなぐ連結部材と、を備え、第1連結部及び第2連結部を中心に第1の管及び第2の管がそれぞれ回動する。第1連結部と第2連結部の距離をLD1とし、第1固定部の中心と第2固定部の中心の距離の最大値をLD0としたときに所定の式を満足する。【選択図】図1
