ULTRASONIC MOTOR, ULTRASONIC PROBE AND MEDICAL DEVICE SYSTEM

WIPO Patent Application WO/2023/032202

A1

An ultrasonic motor 1 according to the present invention is equipped with: a vibrator 2 which has a piezoelectric element 3 and an elastic body 4 to which the piezoelectric element is affixed, and vibrates as a result of applying an alternating voltage to the piezoelectric element; a rotor 5 which rotates upon receiving vibrations from the vibrator by being pressed upon while in a state of contact with the surface of the vibrator; a biasing member 10 for biasing the rotor against the elastic body, and an output shaft 6 for outputting the rotations of the rotor. Therein, the elastic body has a hollow section 4a, the rotor and the biasing member are housed in the hollow section, and the rotor rotates while in a state of being pressed against the inner wall surface 4d of the hollow section of the elastic body.

SHIGA YUICHI (JP)
KUGO TOMOYUKI
KOYAMA TAKAHIRO

PCT/JP2021/032656

March 09, 2023

September 06, 2021

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OLYMPUS MEDICAL SYSTEMS CORP (JP)

A61B8/14; H02N2/10

JP2012060707A	2012-03-22
JP2016197946A	2016-11-24

MORITA ET AL.: "A Cylindrical Micro Ultrasonic Motor Using PZT Thin Film Deposited by Single Process Hydrothermal Method", IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTRROL, vol. 45, no. 5, 1998, pages 1178 - 1187, XP011437807, DOI: 10.1109/58.726441
KANDA ET AL.: "A CYLINDRICAL MICRO ULTRASONIC MOTOR USING MICRO- MACHINED PIEZOELECTRIC VIBRATOR", THE 13TH INTERNATIONAL CONFERENCE ON SOLID- STATE SENSORS, ACTUATORS AND MICROSYSTEMS, 9 June 2005 (2005-06-09), pages 721 - 724, XP010828257, DOI: 10.1109/SENSOR.2005.1496518

ITOH-SHIN PATENT OFFICE (JP)

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