Driving device
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United States of America Patent
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-
Oct 5, 2010
Grant Date -
May 21, 2009
app pub date -
Nov 14, 2008
filing date -
Nov 15, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A driving device includes a piezoelectric element that expands and contracts by the application of voltage, a driving shaft fixed to one end of the piezoelectric element in a direction of the optical axis, a lens holder fixed to the other end of the piezoelectric element in the direction of the optical axis, a friction portion frictionally engaged with the driving shaft, and a base that supports the driving shaft such that the driving shaft is capable of moving along the optical axis. The friction portion includes a receiving portion and a leaf spring that are arranged in a manner such that the driving shaft extending along the optical axis is clamped therebetween in the radial direction.
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