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公开(公告)号：US20230236474A1
公开(公告)日：2023-07-27
申请号：US17919027
申请日：2021-04-16
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Stephen Matthew Bunting , Oliver Hart , Joshua Carr , David Ooi , Andrew Benjamin Simpson Brown , James Howarth , Robin Eddington
CPC classification number: G03B3/10 , G03B5/00 , G03B2205/0076 , G03B2205/0015
Abstract: An actuator assembly (23) includes a first part (24), a second part (25), and a bearing arrangement (26) mechanically coupling the first part (24) to the second part (25). The actuator assembly (23) also includes a drive arrangement (11, 20) including a total of four lengths of shape memory alloy wire (141, 142, 143, 144). The drive arrangement (11, 20) and the bearing arrangement (26) are configured such that the second part (25) is movable towards or away from the first part (24) along a primary axis (z), and the second part (25) is movable relative to the first part (24) along a first axis (x) and/or a second axis (y). The first and second axes (x, y) are perpendicular to the primary axis (z) and the second axis (y) is different to the first axis (x).
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公开(公告)号：US20230204900A1
公开(公告)日：2023-06-29
申请号：US17927310
申请日：2021-05-27
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Oliver Hart , Peter Van Wyk , Andrew Benjamin Simpson Brown , David Ooi , Joshua Carr
CPC classification number: G02B7/09 , F03G7/0665 , F03G7/06143 , G03B13/36 , G03B5/02 , G03B2205/0076
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：US20230032266A1
公开(公告)日：2023-02-02
申请号：US17789094
申请日：2020-12-21
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Stephen Matthew Bunting , Oliver Hart , David Ooi , Peter Van Wyk , Joshua Carr
Abstract: An 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 along a helical path around a helical axis; an actuating mechanism configured to drive rotation of the movable element around the helical axis which the helical bearing arrangement converts into said helical movement; and a loading arrangement configured to exert a biasing force on the movable element in a direction that is at least substantially normal to the helical path over an operating range of the helical movement.
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公开(公告)号：US20250027485A1
公开(公告)日：2025-01-23
申请号：US18713045
申请日：2022-11-24
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Andrew Benjamin Simpson Brown , Stephen Matthew Bunting , Robin Eddington , Oliver Hart , James Howarth
Abstract: An actuator assembly comprising: a support structure comprising a first friction surface; a movable part comprising a second friction surface engaging the first friction surface; one or more SMA wires arranged, on contraction, to move the movable part relative to the support structure to any position within a range of movement; a biasing arrangement 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, on contraction, to reduce the normal force between first and second friction surfaces.
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公开(公告)号：US20240329421A1
公开(公告)日：2024-10-03
申请号：US18580253
申请日：2022-07-20
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Stephen Matthew Bunting , Samuel Armstrong , Robert Langhorne , Andrew Benjamin Simpson Brown , Oliver Hart , Kiran Auchoybur , Alexander Johnson , Peter Van Wyk
CPC classification number: G02B27/646 , G02B7/022 , G03B13/36
Abstract: An actuator assembly comprising: a static part; a moving part; an intermediate part; a first bearing arrangement which guides movement of the intermediate part relative to the static part; a second bearing arrangement which guides movement of the moving part relative to the intermediate part; and an actuator arrangement arranged to drive movement of the moving part relative to the static part; and at least one overall endstop between the static part and the moving part and arranged such that the moving part contacts the static part at a limit of movement of the moving part relative to the static part.
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Patent Agency Ranking
公开(公告)号：US20230213836A1
公开(公告)日：2023-07-06
申请号：US17912654
申请日：2021-03-26
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Robin Eddington , James Howarth , Konstantinos Pantelidis , Stephen Matthew Bunting , Daniel John Burbridge , Oliver Hart , Joshua Carr , Peter Van Wyk , Stephen Kindness
CPC classification number: G03B5/00 , H04N23/55 , H04N23/685 , G03B2205/0076 , G03B2205/0007
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：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
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.
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公开(公告)号：US20250020111A1
公开(公告)日：2025-01-16
申请号：US18710375
申请日：2022-11-15
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Andrew Benjamin Simpson Brown , James Howarth , Robin Eddington , Stephen Matthew Bunting , Oliver Hart
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：US20240369805A1
公开(公告)日：2024-11-07
申请号：US18563781
申请日：2022-06-01
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Andrew Benjamin Simpson Brown , James Howarth , Stephen Matthew Bunting , Oliver Hart
Abstract: An actuator arrangement for use in a camera is disclosed. The camera comprises two or more camera elements including an image sensor and one or more optical elements for forming, or aiding forming of, an image of an object on the image sensor. The actuator arrangement comprises: a first part defining a first axis; a first actuator for providing a first type of movement of one or more of the camera elements relative to the first part; a second actuator for providing a second, different type of movement of one or more of the camera elements relative to the first part; a controller configured to (a) cause the first actuator to move one or more of the camera elements so as to provide a first optical image stabilisation (OIS) effect, and (b) cause the second actuator to move one or more of the camera elements so as to provide a second OIS effect. The first and second OIS effects combine to provide an overall OIS effect that is greater than either of the first and second OIS effects.
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公开(公告)号：US20230161226A1
公开(公告)日：2023-05-25
申请号：US17919069
申请日：2021-04-16
Applicant: CAMBRIDGE MECHATRONICS LIMITED
Inventor： Stephen Bunting , Oliver Hart , David Ooi , Joshua Carr , Andrew Benjamin Simpson Brown , James Howarth , Robin Eddington
CPC classification number: G03B5/00 , G03B3/10 , H04N23/54 , G03B2205/0007 , G03B2205/0076
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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