Title:
ULTRASONIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2023/157372
Kind Code:
A1
Abstract:
Provided is an ultrasonic motor which is capable of preventing a stator and a rotor from wearing differently and in which the reduction of lifetime hardly occurs. The ultrasonic motor according to the present invention comprises: a stator 2 having a plate-shaped vibrating body 3 and a plurality of piezoelectric elements 13, said vibrating body 3 including a first principal surface 3a and a second principal surface 3b which face each other, said plurality of piezoelectric elements 13 being provided on the first principal surface 3a of the vibrating body 3 and disposed in a distributed manner in an orbital direction in plan view; a flexible wire 5 provided on the first principal surface 3a of the vibrating body 3 and connected to the plurality of piezoelectric elements 13 by extending along a route A that connects the adjacent piezoelectric elements 13 to each other in the orbital direction; and a rotor that is in contact with the second principal surface 3b of the vibrating body 3. The flexible wire 5 has at least one bent portion 5A that bends so as to deviate from the route A and then return to the route A when viewed in the orbital direction.
Inventors:
YAMASHITA TOSHIAKI (JP)
ASANO HIROSHI (JP)
ASANO HIROSHI (JP)
Application Number:
PCT/JP2022/037656
Publication Date:
August 24, 2023
Filing Date:
October 07, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02N2/12; H02N2/16
Foreign References:
| JPH11187677A | 1999-07-09 | |||
| JP2006269721A | 2006-10-05 |
Attorney, Agent or Firm:
OSAKA FRONT (JP)
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