Vibration actuator reduced in size and suppressed in generating abnormal noise and optical device
AssigneeCanon Kabushiki Kaisha
InventorTakao Mori
Life of this patent
Estimating the term…
Abstract
A vibration actuator suppressed in generating abnormal noise while realizing size reduction. The vibration actuator includes a vibration element having a piezoelectric element and an elastic member, and a contact body in contact with the vibration element. The contact body has a direction in which the vibration element and the contact body move relative to each other as a longitudinal direction and a square bar shape substantially uniform in width and thickness in the longitudinal direction, and includes a first section and a second section which are formed with respective R surfaces different in curvature radius on an edge extending in the longitudinal direction, in an area where the contact body performs frictional sliding on the vibration element.
Claims16
A vibration actuator comprising:
- a vibration element including an electromechanical energy conversion element and an elastic member;
- and
- a contact body in contact with the vibration element,
- wherein the contact body has a direction in which the vibration element and the contact body move relative to each other as a longitudinal direction, and a square bar shape which is substantially uniform in width and thickness in the longitudinal direction, and includes a first section and a second section which are formed with respective R surfaces different in curvature radius on an edge extending in the longitudinal direction, in an area where the contact body performs frictional sliding on the vibration element.
A vibration actuator comprising:
- a vibration element including an electromechanical energy conversion element and an elastic member;
- and
- a contact body in contact with the vibration element,
- wherein the contact body has an annular shape substantially uniform in width in a radial direction and thickness in an axial direction, in which a surface parallel to the radial direction is a frictional sliding surface on the vibration element, and includes a first section and a second section having respective R surfaces different in curvature radius formed on an outer peripheral edge.
An optical device including:
- a vibration actuator, and
- an optical component driven by the vibration actuator,
- the vibration actuator comprising:
- a vibration element including an electromechanical energy conversion element and an elastic member;
- and
- a contact body in contact with the vibration element,
- wherein the contact body has a direction in which the vibration element and the contact body move relative to each other as a longitudinal direction, and a square bar shape which is substantially uniform in width and thickness in the longitudinal direction, and includes a first section and a second section which are formed with respective R surfaces different in curvature radius on an edge extending in the longitudinal direction, in an area where the contact body performs frictional sliding on the vibration element.
An optical device including:
- a vibration actuator, and
- an optical component driven by the vibration actuator,
- the vibration actuator comprising:
- a vibration element including an electro mechanical energy conversion element and an elastic member;
- and
- a contact body in contact with the vibration element,
- wherein the contact body has an annular shape substantially uniform in width in a radial direction and thickness in an axial direction, in which a surface parallel to the radial direction is a frictional sliding surface on the vibration element, and includes a first section and a second section having respective R surfaces different in curvature radius formed on an outer peripheral edge.
Dependencies are inferred from the claim text.