Title:
VIBRATION BODY AND VIBRATION WAVE MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/246028
Kind Code:
A1
Abstract:
This vibration body comprises an electromechanical conversion element which is a piezoelectric ceramic composed of sodium niobate/potassium metal oxide, wherein the absolute value of the temperature characteristics of the relative dielectric constant over the temperature range of from -40°C to 170°C is 500 (ppm/°C) or less; and vibration waves are generated by means of the excitation of the electromechanical conversion element. This vibration wave motor comprises: this vibration body; and a relative motion member which has a sliding surface that is brought into pressure contact with a driving surface of the vibration body, and which is relatively moved by the vibration waves.
Inventors:
ASHIZAWA TAKATOSHI (JP)
WATANABE KAZUTAKA (JP)
TAKAHASHI HIROFUMI (JP)
WATANABE KAZUTAKA (JP)
TAKAHASHI HIROFUMI (JP)
Application Number:
PCT/JP2021/011795
Publication Date:
December 09, 2021
Filing Date:
March 22, 2021
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G03B17/02; G02B7/04; G02B7/08; H01L41/09; H01L41/187; H01L41/257; H02N2/12; H02N2/14; H02N2/16
Domestic Patent References:
| WO2019078239A1 | 2019-04-25 |
Foreign References:
| JP2015180585A | 2015-10-15 | |||
| JP2017108619A | 2017-06-15 | |||
| JP2018088524A | 2018-06-07 | |||
| JP2015113279A | 2015-06-22 | |||
| JP2002255641A | 2002-09-11 | |||
| JP2000313664A | 2000-11-14 | |||
| JP2020097583A | 2020-06-25 | |||
| JPH0117354B2 | 1989-03-30 |
Attorney, Agent or Firm:
TOU-OU PATENT FIRM (JP)
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