Sma actuator assembly
OwnerAndrew Benjamin Simpson Brown, Joshua Carrinventors
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Abstract
An actuator assembly comprises a support structure (6), a movable part (5) movable relative to the support structure, at least one shape memory alloy (SMA) wire (2) connected between the support structure and the movable part via wire attach components and arranged, on contraction, to drive movement of the movable part and a control circuit configured to apply drive signals to the at least one SMA wire so as to drive movement of the movable part relative to the support structure between predetermined positions in a repeated pattern; wherein the length of the at least one SMA wire extending between respective wire attach components is less than 5 mm.
Claims30
An actuator assembly comprising:
- a support structure:
- a movable part movable relative to the support structure:
- at least one shape memory alloy (SMA) wire connected between the support structure and the movable part via wire attach components and arranged, on contraction, to drive movement of the movable part;
- and
- a control circuit configured to apply drive signals to the at least one SMA wire so as to induce movement of the movable part relative to the support structure between predetermined positions in a repeated pattern,
- wherein the length of the at least one SMA wire extending between respective wire attach components is less than 5 mm.
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An actuator assembly comprising:
- a support structure;
- a movable part movable relative to the support structure;
- and
- at least one shape memory alloy (SMA) wire connected between the support structure and the movable part via wire attach components and arranged, on contraction, to drive movement of the movable part;
- wherein the length of the at least one SMA wire extending between respective wire attach components is less than 5 mm, preferably less than 4 mm, more preferably less than 3 mm.
Dependencies are inferred from the claim text.