Actuator assembly

An actuator assembly comprises relatively movable first and second parts 10, (20, figure 1A) and one or more actuating units (30, figure 1A), each of which comprises a body portion 31, a force-modifying mechanism 32 connected between the body portion and the first part, a coupling link (33, figure 2...

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Bibliographische Detailangaben
Hauptverfasser:	Robin Eddington, Robert Langhorne
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM BLASTING CINEMATOGRAPHY ELECTROGRAPHY HEATING HOLOGRAPHY LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOTOTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISEPROVIDED FOR OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PHOTOGRAPHY PHYSICS PRODUCING MECHANICAL POWER SPRING, WEIGHT, INERTIA OR LIKE MOTORS WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	An actuator assembly comprises relatively movable first and second parts 10, (20, figure 1A) and one or more actuating units (30, figure 1A), each of which comprises a body portion 31, a force-modifying mechanism 32 connected between the body portion and the first part, a coupling link (33, figure 2B) connected between the body portion and the second part, and a shape memory alloy (SMA) wire 34 connected between the first part and the body portion for applying an input force on the body portion thereby causing the body portion to apply an output force on the coupling link and causing the coupling link to apply an actuating force on the second part. The actuating force has at least a major component in a plane perpendicular to a primary axis, and the coupling link is compliant in directions perpendicular to the actuating force. One or more limiting arrangements 51 are configured to limit movement along the primary axis of at least a part of at least one of the actuating units. The actuator assembly may be part of a camera assembly which also has an image sensor having an imaging axis parallel to the primary axis, and the actuator assembly is for providing sensor-shift optical image stabilisation.