Vibration wave motor
AssigneeCanon Kabushiki Kaisha
InventorsIchiro Okumura, Hitoshi Mukohjima, Sadayuki Ueha
Life of this patent
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Abstract
A vibration wave motor includes circular shape vibration part having a helical stepped portion inside or outside thereof; a unit, coupled to said vibration part for causing the vibration part to generate a travelling vibration wave propagating along a circumferential direction of the vibration part; and a movable part having a stepped portion threadably engaged with the helical stepped portion, the movable part being frictionally driven by the travelling vibration wave generated by the vibration part.
Claims13
A vibration wave motor comprising:
- (a) circular shape vibration means having a helical stepped portion inside or outside thereof;
- (b) means, coupled to said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means;
- and
- (c) movable means having a stepped portion, threadably engaged with said helical stepped portion said movable means being frictionally driven by the travelling vibration wave generated by said vibration means.
A vibration wave motor comprising:
- (a) cylindrical vibration means having a helical stepped portion inside or outside thereof;
- (b) a pair of electro-mechanical conversion means, respectively connected to end faces of said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means;
- and
- (c) movable means having a stepped portion threadably engaged with said helical stepped portion, said movable means being frictionally driven by the travelling vibration wave generated by said vibration means.
A vibration wave motor comprising:
- (a) circular shape vibration means having a helical stepped portion inside or outside thereof, said vibration means being provided with an engaging portion in part thereof;
- (b) means, coupled to said vibration means, for causing said vibration means to generate a travelling vibration wave propagating along a circumferential direction of said vibration means;
- (c) movable means having a stepped portion threadably engaged with said helical stepped portion, said movable means being frictionally driven by the travelling vibration wave generated by said vibration means;
- and
- (d) fixing means having an engaging portion engaged with said engaging portion of said vibration means, for fixing said vibration means at a predetermined position.
Dependencies are inferred from the claim text.