Drive mechanism having a drive element of shape memory alloy

摘要

The drive element acts on a handle (1) which is rotatable about an axis (2) against the force of a return element. The handle (1) is used as a coupling member to translate a change in shape of the drive element to movement to the control member (9). The drive element is a coil (8) with several turns of a wire (7). The wire turns are arranged and mechanically fastened parallel between an armature (6) and the handle (1). The handle (1) can be rotated about the axis (2) by a change in shape of a winding. The force acting on the handle (1) due to the drive element results from the individual forces of the parallel coil windings acting on the handle (1).