US 2023/0364645 A1 · ULTRASONIC MOTOR

Abstract

A device may include a stator including a vibrating body in a plate shape having a first principal surface and a second principal surface opposed to each other, and including a piezoelectric device provided on the first principal surface of the vibrating body. A device may include a rotor directly or indirectly in contact with the second principal surface of the vibrating body. A device may include a spring in a plate shape having an opening and configured to give elastic force to the rotor in a direction from a side of the rotor to a side of the stator. A device may include a shaft inserted into the opening of the spring and having a mating portion, wherein. A device may include a shape of the opening of the spring is a noncircular shape in a plan view.

Claims20

Dependent claims

An ultrasonic motor comprising:

a stator including a vibrating body in a plate shape with a first principal surface and a second principal surface that oppose each other, and including a piezoelectric device on the first principal surface of the vibrating body;
a rotor in contact with the second principal surface of the vibrating body;
a spring in a plate shape having an opening and configured to generate an elastic force to the rotor in a direction from a side of the rotor to a side of the stator;
and
a shaft inserted into the opening of the spring and including a mating portion,
wherein a shape of the opening of the spring is a noncircular shape in a plan view thereof.

3 more elements

Dependencies are inferred from the claim text.

Ultrasonic motor

Life of this patent

Ultrasonic motor

Life of this patent

Abstract

Claims20