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GB2581689A - Continuous wiring of shape memory alloy actuators - Google Patents

Continuous wiring of shape memory alloy actuators Download PDF

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Publication number
GB2581689A
GB2581689A GB2006363.2A GB202006363A GB2581689A GB 2581689 A GB2581689 A GB 2581689A GB 202006363 A GB202006363 A GB 202006363A GB 2581689 A GB2581689 A GB 2581689A
Authority
GB
United Kingdom
Prior art keywords
wire
sma
moveable
static
sma actuator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB2006363.2A
Other versions
GB2581689B (en
GB202006363D0 (en
Inventor
Farmer Geoffrey
Howarth James
Henry Reddall Nicholas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cambridge Mechatronics Ltd
Original Assignee
Cambridge Mechatronics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cambridge Mechatronics Ltd filed Critical Cambridge Mechatronics Ltd
Priority to GB2217195.3A priority Critical patent/GB2609866B/en
Publication of GB202006363D0 publication Critical patent/GB202006363D0/en
Publication of GB2581689A publication Critical patent/GB2581689A/en
Application granted granted Critical
Publication of GB2581689B publication Critical patent/GB2581689B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
    • F03G7/0614—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using shape memory elements
    • F03G7/06143—Wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
    • F03G7/0616—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element characterised by the material or the manufacturing process, e.g. the assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/066—Actuator control or monitoring
    • F03G7/0665—Actuator control or monitoring controlled displacement, e.g. by using a lens positioning actuator

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Micromachines (AREA)

Abstract

Embodiments of the present techniques provide methods for manufacturing large volumes of shape memory alloy (SMA) actuator assemblies, which may also advantageously simplify and/or speed-up the process of manufacturing SMA actuator assemblies.

Claims (36)

1. A method of manufacture of shape memory alloy (SMA) sub-assemblies, comprising : providing a sheet of material comprising a plurality of static wire attach structures and a plurality of moveable wire attach structures; laying, using a continuous wiring mechanism, at least one SMA actuator wire on the static and moveable wire attach structures; attaching the at least one SMA actuator wire to the static and moveable wire attach structures; and detaching, from the sheet of material, a plurality of SMA sub-assemblies, each comprising a sacrificial body portion formed integrally with at least one static wire attach structure and at least one moveable wire attach structure.
2. The method as claimed in claim 1 wherein the step of laying the at least one SMA actuator wire comprises: laying one SMA actuator wire on the static and moveable wire attach structures, such that each SMA sub-assembly comprises one SMA actuator wire that is: coupled at a first end to a static wire attach structure, and coupled at a second end to a moveable wire attach structure.
3. The method as claimed in claim 1 wherein the step of laying the at least one SMA actuator wire comprises: laying one SMA actuator wire on the static and moveable wire attach structures, such that each SMA sub-assembly comprises one SMA actuator wire that is: coupled at a first end to a first static wire attach structure, coupled at a second end to a second static wire attach structure, and coupled part-way along its length to a moveable wire attach structure.
4. The method as claimed in claim 1 wherein the step of laying the at least one SMA actuator wire comprises: laying two SMA actuator wires on the static and moveable wire attach structures, such that each SMA sub-assembly comprises two SMA actuator wires that are each : coupled at a first end to a static wire attach structure, and coupled at a second end to a moveable wire attach structure.
5. The method as claimed in claim 1 wherein the step of laying the at least one SMA actuator wire comprises: laying a total of two SMA actuator wires on the static and moveable wire attach structures, such that each SMA sub-assembly comprises two SMA actuator wires that are each : coupled at a first end to a first static wire attach structure, coupled at a second end to a second static wire attach structure; and coupled part-way along its length to a moveable wire attach structure.
6. The method as claimed in claim 1 wherein the step of laying at least one SMA actuator wire comprises: laying a total of four SMA actuator wires on the static and moveable wire attach structures, such that each SMA sub-assembly comprises four SMA actuator wires that are each : coupled at a first end to one of four static wire attach structures, and coupled at a second end to one of two moveable wire attach structures, such that each moveable wire attach structure is coupled to two SMA actuator wires.
7. The method as claimed in claim 1 wherein the step of laying at least one SMA actuator wire comprises: laying a total of four SMA actuator wires on the static and moveable wire attach structures, such that each SMA sub-assembly comprises four SMA actuator wires that are each : coupled at a first end to one of four static wire attach structures, and coupled at a second end to one of four moveable wire attach structures.
8. The method as claimed in any preceding claim wherein the step of providing a sheet of material comprises providing a sheet of phosphor bronze, steel or stainless steel material .
9. The method as claimed in any preceding claim wherein the step of providing a sheet of material comprises providing a sheet of etched material that has been formed to provide the plurality of static and moveable wire attach structures.
10. The method as claimed in any preceding claim wherein the plurality of static and moveable wire attach structures are open crimps, and the step of laying the at least one SMA actuator wire on the static and moveable wire attach structures comprises: laying the at least one SMA actuator wire on the static and moveable open crimps.
11. The method as claimed in claim 10 wherein the step of attaching the at least one SMA actuator wire to the static and moveable wire attach structures comprises: closing the static and moveable open crimps around the at least one SMA actuator wire; and applying a punch tool to each of the static and moveable closed crimps.
12. The method as claimed in any one of claims 1 to 11 wherein the step of detaching the plurality of SMA sub-assemblies comprises: applying a punch tool to detach the body portion from the sheet of material.
13. The method as claimed in any one of claims 1 to 11 wherein the step of detaching the plurality of SMA sub-assemblies comprises: etching the sheet of material to detach the body portion from the sheet of material.
14. The method as claimed in any one of claims 1 to 11 wherein the step of detaching the plurality of SMA sub-assemblies comprises: cutting the sheet of material to detach the body portion from the sheet of material .
15. The method as claimed in any preceding claim wherein the step of detaching the plurality of SMA sub-assemblies comprises: cutting the at least one SMA actuator wire at a position on the sheet of material between adjacent SMA sub-assemblies.
16. The method as claimed in any one of claims 1 to 15 wherein the step of laying the at least one SMA actuator wire comprises weaving the at least one SMA actuator wire around one or more guide tabs in the sheet of material .
17. The method as claimed in any one of claims 1 to 15 wherein the step of laying the at least one SMA actuator wire comprises: laying the at least one SMA actuator wire on a first wire attach structure; weaving the at least one SMA actuator wire between one or more guide tabs on the sheet of material to control the position and length of SMA actuator wire between adjacent wire attach structures; and laying the at least one SMA actuator wire on a second wire attach structure.
18. The method as claimed in any preceding claim wherein the step of laying the at least one SMA actuator wire comprises: laying the at least one SMA actuator wire on a wire attach structure around one or more crimp guide tabs on the sheet of material in the vicinity of each wire attach structure to retain the SMA actuator wire on the wire attach structure.
19. The method as claimed in claim 18 wherein a first crimp guide tab is provided on a first side of the wire attach structure, and a second crimp guide tab is provided on a second side of the wire attach structure.
20. The method as claimed in any preceding claim wherein the step of laying the at least one SMA actuator wire comprises: weaving the at least one SMA actuator wire around one or more wire direction guide tabs on the sheet of material to control the angle of the SMA actuator wire between adjacent SMA sub-assemblies.
21. A method for manufacturing a shape memory alloy (SMA) actuation apparatus comprising : providing a support structure; providing a moveable component supported on the support structure in a manner allowing movement of the moveable component relative to the support structure; providing, on the support structure and moveable component, an SMA subassembly manufactured using the method of any of claims 1 to 20; attaching the static and moveable wire attach structures of the SMA subassembly to the support structure and moveable component respectively; and detaching the static and moveable wire attach structures from the sacrificial body portion of the SMA sub-assembly.
22. An array of shape memory alloy (SMA) sub-assemblies, comprising : a plurality of sacrificial body portions that are connected in a one- dimensional or two-dimensional array, each sacrificial body portion formed integrally with at least one static wire attach structure and at least one moveable wire attach structure; and at least one SMA actuator wire attached to the static and moveable wire attach structures, where the at least one SMA actuator wire is provided on the static and moveable wire attach structures using a continuous wiring process.
23. The array of SMA sub-assemblies as claimed in claim 22 further comprising : a plurality of guide tabs to control the position and length of SMA actuator wire between wire attach structures
24. The array of SMA sub-assemblies as claimed in claim 22 or 23 further comprising at least one crimp guide tab in the vicinity of each wire attach structure, to retain the SMA actuator wire on the wire attach structure during assembly .
25. The array of SMA sub-assemblies as claimed in claim 24 wherein a first crimp guide tab is provided on a first side of each wire attach structure, and a second crimp guide tab is provided on a second side of each wire attach structure.
26. The array of SMA sub-assemblies as claimed in any one of claims 22 to 25 further comprising a plurality of wire direction guide tabs to control the angle of the SMA actuator wire between adjacent sacrificial body portions .
27. A method for manufacturing shape memory alloy (SMA) actuation apparatus, comprising : providing a plurality of support structures; providing a moveable component on each of the plurality of support structures, each moveable component being supported on the support structure in a manner allowing movement of the moveable component relative to the support structure; providing an array of SMA sub-assemblies as recited in any one of claims 22 to 27 on the plurality of support structures and moveable components; attaching the static and moveable wire attach structures of each SMA sub- assembly to a support structure and moveable component respectively; cutting the at least one SMA actuator wire between adjacent SMA subassemblies; and detaching the static and moveable wire attach structures from the sacrificial body portion of each SMA sub-assembly.
28. A shape memory alloy (SMA) actuation apparatus manufactured using the method of claim 21.
29. A shape memory alloy (SMA) actuation apparatus comprising : a static component comprising four static wire attach structures; a moveable component moveable relative to the static component and comprising two moveable wire attach structures; and at least two shape memory alloy (SMA) actuator wires connected between the moveable component and the static component and arranged to, on contraction, move the moveable component.
30. The SMA actuation apparatus as claimed in claim 29 comprising a total of two SMA actuator wires connected between the moveable component and the static component and arranged to, on contraction, move the moveable component, wherein each SMA actuator wire is: coupled at a first end to one of the four static wire attach structures, coupled at a second end to another of the four static wire attach structures; and coupled part-way along its length to one of the moveable wire attach structures.
31. The SMA actuation apparatus as claimed in claim 30 comprising a total of four SMA actuator wires connected between the moveable component and the static component and arranged to, on contraction, move the moveable component, wherein each SMA actuator wire is: coupled at a first end to one of the four static wire attach structures, and coupled at a second end to one of the moveable wire attach structures, such that each moveable wire attach structure is coupled to two SMA actuator wires.
32. The SMA actuation apparatus as claimed in claim 29, 30 or 31 wherein the moveable component is moveable relative to the static component in two orthogonal directions perpendicular to a notional primary axis extending through the moveable component.
33. The SMA actuation apparatus as claimed in any one of claims 29 to 32 wherein the SMA actuator wires are slack.
34. The SMA actuation apparatus as claimed in any one of claims 29 to 33 wherein the SMA actuation apparatus is formed using a continuous wiring process.
35. An apparatus comprising an SMA actuation apparatus as claimed in any of claims 28 to 34.
36. The apparatus as claimed in claim 35 wherein the apparatus is any one of: a smartphone, a camera, a foldable smartphone, a foldable image capture device, a foldable smartphone camera, a foldable consumer electronics device, an image capture device, a 3D sensing device or system, a consumer electronics device, a mobile computing device, a mobile electronic device, a laptop, a tablet computing device, an e-reader, a computing accessory, a computing peripheral device, a security system, a medical device, a gaming system, a gaming accessory, an augmented reality system, an augmented reality device, a virtual reality system, a virtual reality device, a wearable device, a drone, an autonomous vehicle, and a vehicle.
GB2006363.2A 2017-04-20 2018-10-30 Continuous wiring of shape memory alloy actuators Active GB2581689B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2217195.3A GB2609866B (en) 2017-04-20 2018-10-30 Shape memory alloy actuator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1717858.3A GB201717858D0 (en) 2017-10-30 2017-10-30 SMA 2-wire OIS, continuous wiring
PCT/GB2018/053134 WO2019086854A2 (en) 2017-10-30 2018-10-30 Continuous wiring of shape memory alloy actuators

Publications (3)

Publication Number Publication Date
GB202006363D0 GB202006363D0 (en) 2020-06-17
GB2581689A true GB2581689A (en) 2020-08-26
GB2581689B GB2581689B (en) 2022-12-28

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GBGB1717858.3A Ceased GB201717858D0 (en) 2017-10-30 2017-10-30 SMA 2-wire OIS, continuous wiring
GB2006363.2A Active GB2581689B (en) 2017-04-20 2018-10-30 Continuous wiring of shape memory alloy actuators

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Application Number Title Priority Date Filing Date
GBGB1717858.3A Ceased GB201717858D0 (en) 2017-10-30 2017-10-30 SMA 2-wire OIS, continuous wiring

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CN (1) CN111295512B (en)
GB (2) GB201717858D0 (en)
WO (1) WO2019086854A2 (en)

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EP4127467A1 (en) * 2020-03-26 2023-02-08 Cambridge Mechatronics Limited A shape memory alloy actuator

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GB201917543D0 (en) 2019-12-02 2020-01-15 Cambridge Mechatronics Ltd Actuator assembly
GB2612116A (en) * 2021-10-22 2023-04-26 Cambridge Mechatronics Ltd SMA actuator assembly
GB202117956D0 (en) * 2021-12-13 2022-01-26 Cambridge Mechatronics Ltd Shape memory alloy sub-assemblies
US20240244758A1 (en) * 2023-01-16 2024-07-18 Sciperio, Inc Wire Dispensing Device

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WO2007113478A1 (en) * 2006-03-30 2007-10-11 1...Limited Camera lens actuation apparatus
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US20090051776A1 (en) * 2007-08-21 2009-02-26 Mats Goran Henry Wernersson Autofocus assembly
US20120174572A1 (en) * 2011-01-10 2012-07-12 Donato Clausi Method for mechanical and electrical integration of sma wires to microsystems
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WO2017055788A1 (en) * 2015-09-29 2017-04-06 Cambridge Mechatronics Limited Shape memory alloy actuator arrangement

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WO2010089529A1 (en) 2009-02-09 2010-08-12 Cambridge Mechatronics Limited Optical image stabilisation
EP3629081A3 (en) 2010-02-26 2020-07-29 Cambridge Mechatronics Limited Sma actuation apparatus
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WO2007113478A1 (en) * 2006-03-30 2007-10-11 1...Limited Camera lens actuation apparatus
WO2008099156A2 (en) * 2007-02-12 2008-08-21 Cambridge Mechatronics Limited Shape memory alloy actuation apparatus
US20090051776A1 (en) * 2007-08-21 2009-02-26 Mats Goran Henry Wernersson Autofocus assembly
US20120174572A1 (en) * 2011-01-10 2012-07-12 Donato Clausi Method for mechanical and electrical integration of sma wires to microsystems
WO2016189314A1 (en) * 2015-05-26 2016-12-01 Cambridge Mechatronics Limited Assembly method for a shape memory alloy actuator arrangement
WO2017055788A1 (en) * 2015-09-29 2017-04-06 Cambridge Mechatronics Limited Shape memory alloy actuator arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4127467A1 (en) * 2020-03-26 2023-02-08 Cambridge Mechatronics Limited A shape memory alloy actuator

Also Published As

Publication number Publication date
GB2581689B (en) 2022-12-28
CN111295512B (en) 2024-12-31
GB201717858D0 (en) 2017-12-13
GB202006363D0 (en) 2020-06-17
WO2019086854A2 (en) 2019-05-09
WO2019086854A3 (en) 2019-06-13
CN111295512A (en) 2020-06-16

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