| 摘要 |
PURPOSE:To permit to convert the force of a spring into a torque immediately by a method wherein the spring of shape memory alloy, for generating the torque, is attached so as to be expanded and contracted only but not to be moved especially in order not to generate a resistant force which preclude the rotation of the device. CONSTITUTION:When low-temperature fluid is supplied into first cylinder 6a and high-temperature fluid is supplied into fifth cylinder 6e, three sets of coil springs 9 in fifth - seventh cylinders 6e-6g are contracted and respective coil springs 9 in the first - third cylinders 6a-6c are expanded. Accordingly, the component of their tensions is changed into the axial direction of the seventh cylinder 6g and a ring member 4 moves to the direction of the component whereby a disc 3 rotates clock-wise about an output shaft 1. |
