Title:
OPTICAL ELEMENT DRIVING DEVICE, CAMERA MODULE, AND CAMERA-EQUIPPED DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/113510
Kind Code:
A1
Abstract:
Provided are an optical element driving device, a camera module, and a camera-equipped device, whereby it is possible to suppress a decrease in drive performance over time that accompanies wear of an active element or a passive element. The optical element driving device comprises: a fixed part; a movable part positioned apart from the fixed part; a support part for supporting the movable part in relation to the fixed part; and a drive unit (30) having an ultrasonic motor which has a piezoelectric element (32) and an active element (31) that resonates with vibration of the piezoelectric element (32), and a passive element (34) that contacts the active element (31) in a state of being urged thereby and moves relative to the active element (31). Passive-side contact parts (343) of the passive element (34) are formed of a ceramic material having higher hardness than active-side contact parts (312) of the active element (31).
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Inventors:
OSAKA TOMOHIKO
Application Number:
PCT/JP2021/035569
Publication Date:
June 02, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
MITSUMI ELECTRIC CO LTD (JP)
OSAKA TOMOHIKO
OSAKA TOMOHIKO
International Classes:
G02B7/04; G03B5/00; G03B30/00; H02N2/04; H04N5/225; H04N5/232
Domestic Patent References:
| WO2013099260A1 | 2013-07-04 | |||
| WO2011055503A1 | 2011-05-12 |
Foreign References:
| JP2010063349A | 2010-03-18 | |||
| JP2017055554A | 2017-03-16 | |||
| JPH11318090A | 1999-11-16 | |||
| JP2016080960A | 2016-05-16 |
Attorney, Agent or Firm:
WASHIDA & ASSOCIATES (JP)
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