Patent ID: 8901786

Claim:
Actuator having a drive element ( 16 ) which can be driven in reaction to electrical operation of a coil device ( 14 ), said drive element consisting of a magnetic shape-memory material and being designed to transmit mechanical drive energy to an actuating partner ( 28 ), wherein the drive element, which is in the form of an expansion unit ( 16 ) and is aligned such that it extends in a drive direction ( 22 ), is associated with a pair of laterally adjacent magnetic flux guide elements ( 18 , 20 ) for a magnetic flux produced by the coil device, such that the magnetic flux is guided between the flux guide elements through the expansion unit and transversely with respect to the drive direction, the coil device ( 14 ) being provided such that it is circumferential around the expansion unit ( 16 ) which extends axially in the drive direction.