Vibration wave motor and lens driving apparatus
AssigneeCanon Kabushiki Kaisha
InventorShunsuke Ninomiya
Life of this patent
Estimating the term…
Abstract
A vibration wave motor includes a vibrator, a pressing member configured to press the vibrator against a friction member, a holding member configured to hold the vibrator, and a buffering member provided between the vibrator and the holding member. The vibrator and the friction member are moved relatively to each other in a relative movement direction by vibration of the vibrator, and the holding member holds the vibrator in such a manner that an extending part extending in a pressing direction of the pressing member sandwiches the vibrator and the buffering member.
Claims13
A vibration wave motor comprising:
- a vibrator;
- a pressing member configured to press the vibrator against a friction member;
- a holding member configured to hold the vibrator;
- and
- a buffering member provided between the vibrator and the holding member,
- wherein the vibrator and the friction member are moved relatively to each other in a relative movement direction by vibration of the vibrator,
- wherein the holding member includes an extending part extending in a pressing direction of the pressing member and holds the vibrator in such a manner that the holding member sandwiches the vibrator and the buffering member with the extending part,
- wherein the vibrator is provided with one of a holding projection and a holding recess having a concave shape, and the extending part is provided with the other one of the holding projection and the holding recess, and the holding projection and the holding recess engage with each other to regulate and hold movement of the vibrator in the relative movement direction relative to the holding member, and
- wherein the one of the holding projection and the holding recess provided on the vibrator is provided at an intersection between nodes of two natural vibration modes generated in the vibrator.
A lens driving apparatus comprising:
- a vibration wave motor including:
- a vibrator;
- a pressing member configured to press the vibrator against a friction member;
- a holding member configured to hold the vibrator;
- and
- a buffering member provided between the vibrator and the holding member;
- and
- a lens,
- wherein the vibrator and the friction member are moved relatively to each other in a relative movement direction by vibration of the vibrator,
- wherein the holding member includes an extending part extending in a pressing direction of the pressing member and holds the vibrator in such a manner that the holding member sandwiches the vibrator and the buffering member with the extending part,
- wherein the vibrator is provided with one of a holding projection and a holding recess having a concave shape, and the extending part is provided with the other one of the holding projection and the holding recess, and the holding projection and the holding recess engage with each other to regulate and hold movement of the vibrator in the relative movement direction relative to the holding member,
- wherein the one of the holding projection and the holding recess provided on the vibrator is provided at an intersection between nodes of two natural vibration modes generated in the vibrator, and
- wherein the lens is driven by the relative movement in an optical axis direction.
Dependencies are inferred from the claim text.