초록 ▼

A drive apparatus for reversible movements of an actuator is provided with a drive element made from a shape memory alloy with one-way effect. The drive element acts upon a lever rotatable about an axle in opposition to the force of a resetting element, wherein the lever can be used as a coupling me

A drive apparatus for reversible movements of an actuator is provided with a drive element made from a shape memory alloy with one-way effect. The drive element acts upon a lever rotatable about an axle in opposition to the force of a resetting element, wherein the lever can be used as a coupling member for converting a deformation of the drive element into a movement of the actuator. The drive element is a winding with a plurality of turns of a wire, wherein the turns are fixed and arranged mechanically parallel between an anchor point and the lever so that the lever is rotatable about the axle by means of a deformation of a turn, and the tractive force acting upon the lever by means of the drive element results from the individual forces of the turns of the winding acting mechanically parallel upon the lever. The diameter of the wire is advantageously approximately equal to the standardised diameter of the crystalline grain of the shape memory alloy in the austenitic state.

대표청구항 ▼

Drive apparatus for effecting reversible movements of an actuator, the drive apparatus comprising: a drive element comprising a winding made from a shape memory alloy with one-way effect, the winding comprising a plurality of turns of wire; a lever rotatable about an axle in opposition to the force

Drive apparatus for effecting reversible movements of an actuator, the drive apparatus comprising: a drive element comprising a winding made from a shape memory alloy with one-way effect, the winding comprising a plurality of turns of wire; a lever rotatable about an axle in opposition to the force of a resetting element; an anchor point for the turns of said winding; wherein the turns of said winding are fixed and arranged mechanically parallel between said anchor point and said lever such that said lever is rotatable about said axle by means of deformation of a said turn and the tractive force applied to said lever by said winding results from the individual forces applied by said turns acting mechanically parallel upon said lever, wherein said lever can be used as a coupling element for converting a deformation of said winding into a movement of the actuator; and wherein the diameter of said wire is substantially equal to the standardized diameter of the crystalline grain of said shape memory alloy in the austenitic state.