Vibration-type driving apparatus
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United States of America Patent
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Mar 3, 2015
Grant Date -
Jun 14, 2012
app pub date -
Nov 22, 2011
filing date -
Dec 9, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A vibration-type driving apparatus includes a vibration member, to which an electrical-mechanical energy conversion element is fixed and which is vibrated when a driving voltage is applied to the electrical-mechanical energy conversion element; and a moving member that comes into contact with the vibration member and rotates relative to the vibration member in accordance with the vibration. The moving member includes a body portion and a contacting portion with a friction surface that comes into frictional contact with the vibration member and, in an area extending from a rotation axis in a radial direction, a line connecting a centroid of a shape of the moving member to an arbitrary point of the contacting portion of the moving member is parallel to a direction of the vibration trajectory of the vibration member.
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