Driving device capable of obtaining a stable frequency characteristic
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United States of America Patent
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Dec 15, 2009
Grant Date -
Oct 23, 2008
app pub date -
Apr 15, 2008
filing date -
Apr 17, 2007
priority date (Note) -
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Abstract
A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a static member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion coupled to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The driving device is covered with a cabinet. An elastic member lies between the cabinet and the static member.
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