US 2010/0133956 A1 · ULTRASONIC ACTUATOR

Abstract

An ultrasonic actuator (3) includes an actuator body (4) performing a plurality of vibrations including a bending vibration, and a driver element (5) which is attached to a long side surface (40b) of the actuator body (4), and outputs a driving force by making an orbit motion in response to the vibrations of the actuator body (4). The driver element (5) is provided with an attachment surface (51), and is attached to the long side surface (40b) with the attachment surface (51) in surface contact with the long side surface (40b). A width of the attachment surface (51) in the longitudinal direction of the long side surface (40b) is smaller than a maximum width of the driver element (5) in the longitudinal direction of the long side surface (40b).

Claims9

Dependent claims

An ultrasonic actuator comprising:

an actuator body having a piezoelectric element and performing a bending vibration and a longitudinal vibration;
and
a driver element which is attached to the actuator body and, in response to the bending vibration and the longitudinal vibration of the actuator body, outputs a driving force by making an orbit motion in a plane including a vibration direction of the bending vibration and a vibration direction of the longitudinal vibration, wherein
a width of an area where the driver element is in contact with the actuator body in the vibration direction of the longitudinal vibration is smaller than a maximum width of the driver element in the vibration direction of the longitudinal vibration.

1 more element

Dependencies are inferred from the claim text.

Ultrasonic actuator

Life of this patent

Ultrasonic actuator

Life of this patent

Abstract

Claims9