Actuator assembly

Abstract

An actuator assembly comprising: a base; a rotatable part that is rotatable relative to the base about a primary axis; and one or more actuating units each configured to apply an actuating force capable of rotating the rotatable part relative to the base about the primary axis, each actuating unit comprising: a body portion; a shape memory alloy, SMA, element connected between the body portion and one of the base and the rotatable part and configured, on actuation of the actuating unit, to apply an input force to the body portion; a force-modifying element coupling the body portion and the one of the base and the rotatable part and configured such that the input force is modified to give rise to the actuating force; and a coupling element coupling the body portion to the other of the base and the rotatable part and capable of transmitting the actuating force to the other of the base and the rotatable part.

Dependencies are inferred from the claim text.