公开(公告)号：WO2021240161A2

公开(公告)日：2021-12-02

申请号：PCT/GB2021/051293

申请日：2021-05-27

Applicant: CAMBRIDGE MECHATRONICS LIMITED

Inventor： BROWN, Andrew Benjamin Simpson ,  CARR, Joshua ,  HART, Oliver

IPC: F03G7/06 ,  G02B7/00 ,  G02B7/02 ,  G03B3/10 ,  G03B5/00 ,  G02B7/04 ,  F03G7/0614 ,  F03G7/0665 ,  G02B7/023 ,  G02B7/102 ,  G03B2205/0046 ,  G03B2205/0053 ,  G03B2205/0076

Abstract: Actuator assembly comprising a first part (102), a second part (110), and a helical bearing arrangement (20). The helical bearing arrangement is arranged to guide helical movement of the second part with respect to the first part around a helical axis. The helical bearing arrangement comprises first and second helical bearings. The first helical bearing comprises a first track and a first bearing element received in the first track and the second helical bearing comprises a second track and second bearing element received in the second track. The first and second bearing elements are offset in a direction along the helical axis. The present disclosure also relates to an autofocus system and a camera system.

公开(公告)号：WO2021262531A1

公开(公告)日：2021-12-30

申请号：PCT/US2021/037947

申请日：2021-06-17

Applicant: HUTCHINSON TECHNOLOGY INCORPORATED

Inventor： RUZICKA, Ryan, N. ,  SAKAMOTO, Yasushi

IPC: F03G7/06 ,  G02B7/04 ,  G02B7/09 ,  G02B7/10 ,  G03B3/10 ,  G03B13/36 ,  H01H61/00 ,  F03G7/06143 ,  F03G7/0665

Abstract: SMA actuators and related methods are described. One embodiment of an actuator includes a base; a plurality of buckle arms; and at least a first shape memory alloy wire coupled with a pair of buckle arms of the plurality of buckle arms. Another embodiment of an actuator includes a base and at least one bimorph actuator including a shape memory alloy material. The bimorph actuator attached to the base.

公开(公告)号：WO2021240165A1

公开(公告)日：2021-12-02

申请号：PCT/GB2021/051298

申请日：2021-05-27

Applicant: CAMBRIDGE MECHATRONICS LIMITED

Inventor： HART, Oliver ,  EDDINGTON, Robin ,  VAN WYK, Peter ,  BROWN, Andrew Benjamin Simpson ,  FARMER, Geoffrey

IPC: G02B7/00 ,  G02B7/02 ,  G02B7/04 ,  G03B3/10 ,  G03B5/00 ,  F03G7/06 ,  F03G7/0665 ,  G02B7/08 ,  G03B2205/0007 ,  G03B2205/0046 ,  G03B2205/0076

Abstract: An actuation apparatus is disclosed. The actuation apparatus comprises a first part (2), a second part (10), and a bearing arrangement (20) supporting the second part on the first part. The bearing arrangement is arranged to guide movement of the second part with respect to the first part. The bearing arrangement comprises a bearing having a first bearing surface (31) located on the first part and a second bearing surface (32) located on the second part, and a rolling bearing (33, 38) configured to be disposed between the first and second bearing surfaces such that the first and second bearing surfaces are spaced by a gap. One of the first bearing surface and the second bearing surface is configured such that the bearing surface has a single contact point with the rolling bearing at any one time and the other of the first bearing surface and the second bearing surface is configured such that the bearing surface has two contact points with the rolling bearing at any one time. The two contact points of the first or second bearing surface are located closer to the axis of rotation of the rolling bearing than the single contact point of the other of the first or second bearing surface, such that the distance moved by the rolling bearing relative to the first part is different to the distance moved by the second part relative to the rolling bearing.