Patent ID: 6404098
Filing Date: 2002-06-11
Classification: F03G,F16F

Abstract:
A drive unit using a shape memory alloy, comprising:a shape memory alloy member made from a shape memory alloy, said shape memory alloy member exhibiting superelasticity when being energized; a drive body connected to said shape memory alloy member, said drive body being moved from a stopping position to a specific operational position when said shape memory alloy member is energized; and a locking mechanism for retaining said drive body at said specific operational position, wherein said locking mechanism is provided with a locking portion, said drive body is integrally provided with a portion to be locked with said locking portion, and said locking mechanism is additionally provided with a locking-releasing mechanism responsive to an extensible/contractible member made from a shape memory alloy and that exhibits superelasticity when being electrified, whereby the retention of said drive body at said specific operational position is released by energizing said extensible/contractible member.