VIBRATION MEMBER USING ELECTRO-MECHANICAL ENERGY CONVERSION ELEMENT AS DRIVING SOURCE, VIBRATION WAVE DRIVING APPARATUS USING VIBRATION MEMBER AS DRIVING SOURCE AND APPARATUS PROVIDED WITH VIBRATION WAVE DRIVING APPARATUS
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United States of America Patent
Stats
-
Jan 6, 2004
Grant Date -
N/A
app pub date -
Jul 26, 2000
filing date -
Jul 28, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed a vibration member comprising: a driving portion; an elastic member including the driving portion; and an electro-mechanical energy conversion element as a driving source in contact with the elastic member. The electro-mechanical energy conversion element is provided with an alternating signal to generate a plurality of vibrations, and the plurality of vibrations are combined to generate a driving vibration in the driving portion. An ununiformity of rigidity of the vibration member caused by a polarization treatment performed on the electro-mechanical energy conversion element is offset by partially changing the rigidity of the vibration member, so that a stable driving vibration of the vibration member can be outputted.
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