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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.
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公开(公告)号：WO2021191626A1
公开(公告)日：2021-09-30
申请号：PCT/GB2021/050741
申请日：2021-03-26
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： EDDINGTON, Robin , HOWARTH, James , PANTELIDIS, Konstantinos , BUNTING, Stephen Matthew , BURBRIDGE, Daniel John , HART, Oliver , CARR, Joshua , VAN WYK, Peter , KINDNESS, Stephen
IPC: F03G7/06 , G02B7/00 , G03B3/10 , G03B5/00 , G02B27/646 , G02B7/08 , G03B2205/0007 , G03B2205/0069 , G03B2205/0076 , G03B30/00 , H04N5/2254 , H04N5/23248 , H04N5/2328 , H04N5/23287
Abstract: A shape memory alloy (SMA) actuator (100) for a camera assembly, comprising: - a support structure supporting an electronic component, wherein the electronic component is susceptible to interference caused by magnetic flux; - a moveable part moveable relative to the support structure; one or more SMA components (12) connected between the moveable part and the support structure, wherein the one or more SMA components are configured to, on contraction, drive movement of the movable part; - a first electrical path and a second electrical path defined between, and/or including, each of the one or more SMA components (12) and respective electrical terminals (3a); and wherein the first and second electrical paths of each of the one or more SMA components are configured to, at least in part, extend adjacently to and in parallel with each other, and enabling the electrical current in the respective paths to flow in opposite directions, so as to minimise combined magnetic flux from the first and second electrical paths into the electronic component.
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公开(公告)号：WO2023089334A1
公开(公告)日：2023-05-25
申请号：PCT/GB2022/052939
申请日：2022-11-18
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： HART, Oliver , JOHNSON, Alexander , HEIJNE, Nicolas , BUNTING, Stephen Matthew , ARMSTRONG, Samuel , EDDINGTON, Robin , BROWN, Andrew Benjamin Simpson , HOWARTH, James
Abstract: An apparatus comprising: a support structure; a movable part; an actuator assembly configured to move the movable part relative to the support structure; a flat flexible connector for making electrical connections to the movable part, wherein the flexible connector is connected at one end to the movable part and comprises a bend about an axis substantially parallel to a major surface of the flexible connector; and a locating feature configured to locate the bend relative to the movable part.
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公开(公告)号：WO2023084251A1
公开(公告)日：2023-05-19
申请号：PCT/GB2022/052893
申请日：2022-11-15
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： BROWN, Andrew Benjamin Simpson , HOWARTH, James , EDDINGTON, Robin , BUNTING, Stephen Matthew , HART, Oliver
IPC: F03G7/06
Abstract: An actuator assembly (1) comprising: a support structure (10) comprising a first friction surface (10f); a movable part (20) comprising a second friction surface (20f) engaging the first friction surface; one or more SMA wires (40) arranged, on contraction, to move the movable part relative to the support structure to any position within a range of movement; a biasing arrangement (30) arranged to bias the first and second friction surfaces against each other with a normal force, thereby generating a static frictional force that constrains the movement of the movable part relative to the support structure at any position within the range of movement when the one or more SMA wires are not contracted, wherein the one or more SMA wires are arranged such that the normal force between the first and second friction surfaces remains substantially constant on contraction of the one or more SMA wires.
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公开(公告)号：WO2022200779A1
公开(公告)日：2022-09-29
申请号：PCT/GB2022/050713
申请日：2022-03-22
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： HOWARTH, James , BUNTING, Stephen Matthew , EDDINGTON, Robin , OOI, David , HART, Oliver
Abstract: An actuator assembly (1) comprising a support structure (2); a movable part (10) movable relative to the support structure; a bearing arrangement (20) supporting the movable part on the support structure and arranged to guide helical movement of the movable part with respect to the support structure about a helical axis (H), wherein the bearing arrangement includes at least one flexure (22) which is arranged to flex to cause said guiding; and at least one actuator component connected between the support structure and the movable part and arranged, on contraction, to drive rotation of the movable part around the helical axis, said rotation being converted into helical movement around the helical axis by the bearing arrangement, wherein the actuator assembly includes a resilient portion (41a, 41b), the resilient portion being configured not to deform during normal operation of the assembly, and which is such that, when the assembly is subject to external loads exceeding those of normal operation, the resilient portion is arranged to deform and to thereby permit movement of the movable part relative to the support structure in a plane orthogonal to the helical axis.
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Patent Agency Ranking
公开(公告)号：WO2021209767A1
公开(公告)日：2021-10-21
申请号：PCT/GB2021/050920
申请日：2021-04-16
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： BUNTING, Stephen , HART, Oliver , OOI, David , CARR, Joshua , BROWN, Andrew Benjamin Simpson , HOWARTH, James , EDDINGTON, Robin
Abstract: An actuator assembly (23) is described which includes first part (24), a second part (25) and a bearing arrangement (26) mechanically coupling the first part (24) to the second part (25). The bearing arrangement (26) includes a first bearing (27) mechanically coupling the first part (24) to a third part (28). The actuator assembly (23) also includes a drive arrangement (11, 20). The drive arrangement (11, 20) includes four lengths of shape memory alloy wire (141, 142, 143, 144). Each length of shape memory alloy wire (141, 142, 143, 144) is connected between the third part (28) and the second part (25). The drive arrangement (11, 20) and the bearing arrangement (26) are configured such that in response to a torque applied about a primary axis (z) by the drive arrangement (11, 20), the first bearing (27) generates movement of the first part (24) towards or away from the second part (25) and the third part (28) along the primary axis (z). The bearing arrangement (26) is configured to constrain rotation of the first part (24) relative to the second part (25) about the primary (z) axis.
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公开(公告)号：WO2020178347A1
公开(公告)日：2020-09-10
申请号：PCT/EP2020/055708
申请日：2020-03-04
Applicant: CAMBRIDGE MECHATRONICS LIMITED , UNIVERSITY OF BIRMINGHAM
Inventor： BRYAN, Richard , SHEPHERD, Duncan , GREEN, Naomi , VAN WYK, Peter , CARR, Joshua , HART, Oliver
IPC: A61B17/221 , A61B17/00 , A61B1/00
Abstract: The application describes a surgical device (100), a resectoscope (110) incorporating the surgical device and a method of making the surgical device. The surgical device comprises a housing (102) which is made from a flexible material; a plurality of flexible arms (104) which are attached to the housing and which are configured to move the housing between a closed configuration and an open configuration; and at least one shape memory alloy (SMA) member attached to each one of the plurality of flexible arms. Contraction of the at least one SMA member causes the flexible arm to which the at least one SMA member is attached to flex and move the housing from the closed configuration to the open configuration.
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公开(公告)号：WO2021240164A1
公开(公告)日：2021-12-02
申请号：PCT/GB2021/051296
申请日：2021-05-27
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： HART, Oliver , VAN WYK, Peter , BROWN, Andrew Benjamin Simpson , OOI, David , CARR, Joshua
Abstract: The actuator assembly comprises a first part (102), a second part (110) and a helical bearing arrangement. The helical bearing arrangement is arranged to guide helical movement of the second part with respect to the first part around a helical axis H such that rotation of the second part around the helical axis is converted into helical movement of the second part. The first and second parts comprise respective stops (152, 162) that are arranged such that the stops are spaced from each other throughout an operating range of said helical movement of the second part relative to the first part. The stops are configured to engage if the second part is moved relative to the first part in at least one direction other than the direction of said helical movement such that the engagement of the stops restricts relative movement of the first and second parts.
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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.
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公开(公告)号：WO2021130506A8
公开(公告)日：2021-07-01
申请号：PCT/GB2020/053376
申请日：2020-12-29
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： HOWARTH, James , HART, Oliver , BURBRIDGE, Daniel John , OOI, David , BUNTING, Stephen Matthew , BROWN, Andrew Benjamin Simpson , VAN WYK, Peter
Abstract: An SMA actuation apparatus comprising: a support structure; a movable element; a helical bearing arrangement supporting the movable element on the support structure and arranged to guide helical movement of the movable element with respect to the support structure around a helical axis; and a set of four SMA actuator wires, each wire connected between the support structure and the movable element in, or at an acute angle to, a plane normal to the helical axis, the set of wires comprising a first pair of wires arranged, on contraction, to drive rotation of the movable element in a first sense around the helical axis and a second pair of wires arranged, on contraction, to drive rotation of the movable element in a second, opposite sense around the helical axis, wherein the helical bearing arrangement converts the rotation into the helical movement.
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