US 12,498,532 B2
Actuator assembly
Andrew Benjamin Simpson Brown, Cambridge (GB); Stephen Bunting, Cambridge (GB); James Howarth, Cambridge (GB); and Daniel Burbridge, Cambridge (GB)
Assigned to CAMBRIDGE MECHATRONICS LIMITED, Cambridge (GB)
Appl. No. 17/291,334
Filed by CAMBRIDGE MECHATRONICS LIMITED, Cambridge (GB)
PCT Filed Nov. 15, 2019, PCT No. PCT/GB2019/053260
§ 371(c)(1), (2) Date May 5, 2021,
PCT Pub. No. WO2020/099897, PCT Pub. Date May 22, 2020.
Claims priority of application No. 1818654 (GB), filed on Nov. 15, 2018.
Prior Publication US 2022/0003957 A1, Jan. 6, 2022
Int. Cl. G02B 7/00 (2021.01); F16C 31/06 (2006.01); G03B 5/04 (2021.01); H02K 41/035 (2006.01)
CPC G02B 7/005 (2013.01) [G03B 5/04 (2013.01); H02K 41/0356 (2013.01); F16C 31/06 (2013.01); G03B 2205/0069 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An actuator assembly comprising:
a static part;
a movable part;
a helical bearing arrangement supporting the movable part on the static part and arranged to guide movement of the movable part, with respect to the static part, to both rotate around, and translate along, a helical axis; and
one or more actuators arranged to drive movement of the movable part with respect to the static part around the helical axis, wherein the one or more actuators comprise at least one of a voice coil motor comprising a magnetic element mounted on the moveable part or the static part.