| 摘要 |
In a vibration driven motor, a rotatable member is brought into frictional contact with a vibration member having an electro-mechanical energy conversion element and by the application of an AC electric field to the electro-mechanical energy conversion element, a driving vibration is excited in the vibration member to drive the rotatable member; a rotation output member is provided for frictionally contacting the rotatable member to deliver an output, and the frictional force between the rotatable member and the rotation output member is set to a value smaller than the frictional force between the vibration member and the rotatable member.
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