Driving apparatus

Details Driving apparatus Driving apparatus

2011-01-11

2011-01-11

Budd, Mark (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323020

Reexamination Certificate

active

07868520

ABSTRACT:
A driving apparatus includes a piezoelectric element which expands and contracts when a voltage is applied thereto, a driving shaft fixed to one end of the piezoelectric element in an expanding-and-contracting direction, a friction part frictionally engaged with the driving shaft, a lens holder moved along a direction of an optical axis of a lens, and a direction-changing unit which reciprocates the lens holder in the front-rear direction along the optical axis. The direction-changing unit includes a translation cam mechanism including a moving member and a moved member, and converts a linear movement along the expanding-and-contracting direction into a linear movement along the direction of the optical axis.

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patent: 7622847 (2009-11-01), Kawakatsu
patent: 7-274544 (1995-10-01), None

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