公开(公告)号：US20210263392A1

公开(公告)日：2021-08-26

申请号：US17253696

申请日：2019-06-21

Applicant: CAMBRIDGE MECHATRONICS LIMITED

Inventor： Andrew Brown ,  Stephen Bunting ,  Daniel Burbridge ,  Oliver Hart ,  Nicholas Heijne ,  James Howarth ,  Marc-Sebastian Scholz

IPC: G03B3/10 ,  F03G7/06 ,  G02B7/00 ,  H04N5/232

Abstract: A shape memory alloy actuation apparatus comprises a support structure (2) and a movable element (10). A helical bearing arrangement (20) supporting the movable element on the support structure guides helical movement of the movable element with respect to the support structure around a helical axis (H). At least one shape memory alloy actuator wire (60) is connected between the support structure and the movable element in, or at an acute angle to, a plane normal to the helical axis, so as to drive rotation of the movable element around the helical axis which the helical bearing arrangement converts into said helical movement.