Patent ID: 9677547
Date: 2017-06-13
CPC Classifications: F03G,G03B

Claim:
1. An impact drive type actuator comprising: a wire-shaped shape memory alloy which contracts upon being electrified and heated, an insulating heat conductor which contacts said wire-shaped shape memory alloy and releases the heat which is generated at said wire-shaped shape memory alloy, and a drive circuit which instantaneously electrifies said wire-shaped shape memory alloy to make said wire-shaped shape memory alloy contract, wherein said insulating heat conductor is formed as a rotor which is provided freely rotatably, said wire-shaped shape memory alloy is provided contacting and winding around the circumferential surface of said insulating heat conductor and is fastened at its two ends, and said wire-shaped shape memory alloy tightens against said insulating heat conductor and brakes rotational operation of the insulating heat conductor when said wire-shaped shape memory alloy is electrified and contracts, and the wire-shaped shape memory alloy contacts said insulating heat conductor closely to be made to extend by instantaneous dispersion of heat which is stored by being electrified, and thereby the braking operation by the tightening is removed and repetition of sequential operations of the contracting and extending gives said insulating heat conductor as the rotor a click feeling.