An impact drive type actuator (10) is comprised of a wire-shaped shape memory alloy (11) which contracts upon being electrified and heated, a disk-shaped insulating heat conductor (12) which contacts this wire-shaped shape memory alloy (11) and releases the heat which is generated at the wire-shaped
An impact drive type actuator (10) is comprised of a wire-shaped shape memory alloy (11) which contracts upon being electrified and heated, a disk-shaped insulating heat conductor (12) which contacts this wire-shaped shape memory alloy (11) and releases the heat which is generated at the wire-shaped shape memory alloy, and a drive circuit (16, 17) which instantaneously electrifies the wire-shaped shape memory alloy and instantaneously makes the wire-shaped shape memory alloy contract. According to this impact drive type actuator, it realizes a heat conduction structure which gives rise to a high heat dispersion action by the heat characteristics of the shape memory alloy, so it becomes possible to utilize the deformation by extension and contraction of a shape memory alloy which has a wire-shaped form, improve the speed and response of the deformation operation characteristics, and improve practicality.
대표청구항▼
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, anda drive
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, anda drive circuit which instantaneously electrifies said wire-shaped shape memory alloy to make said wire-shaped shape memory alloy contract, whereinsaid 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, andsaid 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. 2. 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, anda drive circuit which instantaneously electrifies said wire-shaped shape memory alloy to make said wire-shaped shape memory contract, and whereinsaid insulating heat conductor is formed as a rotor which is provided freely rotatably with a circumferential surface formed with a spiral shaped groove,said wire-shaped shape memory alloy is provided contacting and winding around the inside of said groove at the circumferential surface of said insulating heat conductor and one end of the wire-shaped shape memory alloy being fixed and the other end being supported by an elastic mechanism to be tensed,said wire-shaped shape memory alloy making said insulating heat conductor rotate when the wire-shaped shape memory alloy is electrified and contracts,said wire-shaped shape memory alloy winds around said insulating, heat conductor and displaces it rotatably when it is electrified and contracts, and contacts said insulating heat conductor closely to be made to extend by instantaneous dispersion of heat which is stored by being electrified, said insulating heat conductor is rotated to a former position by said elastic mechanism and repetition of sequential operations of the contracting and extending makes said insulating heat conductor rotate. 3. The impact drive type actuator as set forth in claim 2, further comprising: a second wire-shaped shape memory alloy which is separated from said wire-shaped shape memory alloy,said second wire-shaped shape memory alloy, contacting the inside of said groove at the circumferential surface of said insulating heat conductor and winding in a direction opposite to a winding direction of said wire-shaped shape memory alloy, one end of the second wire-shaped memory alloy being fixed and the other end being supported by a second elastic mechanism to be tensed, andsaid wire-shaped shape memory alloy makes said insulating heat conductor turn in one direction when it is electrified and contracts while said second wire-shaped shape memory alloy makes said insulating heat conductor turn in an opposite direction to said one direction when said second wire-shaped shape memory alloy is electrified and contracts. 4. The impact drive type actuator as set forth in claim 2 wherein said spiral shaped groove which is formed at the circumferential surface of said insulating heat conductor is structured so that said wire-shaped shape memory alloy does not contact itself. 5. An impact drive type actuator comprising: a wire-shaped shape memory alloy which contracts upon being electrified and heated.two insulating heat conductors which contact said wire-shaped memory alloy and release the heat which is generated at said wire-shaped shape memory alloy, each of said insulating heat conductors having a plate-shaped form, anda drive circuit which instantaneously electrifies said wire shaped shape memory alloy to make said wire-shaped shape memory contract, wherein,the two plate-shaped insulating heat conductors are arranged facing each other, one of said plate-shaped insulating heat conductors being fixed in place, the other of said plate-shaped insulating heat conductors being arranged to be freely movable and being provided to be pulled in one direction by an elastic mechanism,said wire-shaped shape memory alloy is arranged between said two plate-shaped insulating heat conductors so that said wire shaped shape memory alloy connects said two plate-shaped insulating heat conductors, andsaid wire-shaped shape memory alloy makes said freely movable plate-shaped insulating heat conductor displace by exactly a predetermined distance against said elastic mechanism when it is electrified and contracts. 6. The impact drive type actuator as set forth in claim 5, further comprising a moving member arranged on top of said freely movable plate-shaped insulating heat conductor in a friction contact state and said freely movable plate-shaped insulating heat conductor is repeatedly made to displace whereby said moving member is made to move in one direction.
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