Title:
VIBRATION DEVICE AND OPTICAL DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/038942
Kind Code:
A1
Abstract:
Provided is a vibration device which can effectively vibrate a cover having water droplets, etc., deposited thereon. A vibration device 1 according to the present invention is provided with: a piezoelectric body 7; and a first vibrator 2 and a second vibrator 5 that sandwich the piezoelectric body 7 therebetween and that are disposed so as to fix the piezoelectric body 7 thereto. When the specific frequency of the first vibrator 2 is defined as f1, the specific frequency of the second vibrator 5 is defined as f2, and the specific frequency ratio between the first vibrator 2 and the second vibrator 5 is defined as f2/f1, the specific frequency ratio of the vibration device f2/f1 is 0.6 or more .
Inventors:
SAKAGUCHI HITOSHI (JP)
KISHI NORITAKA (JP)
MORI TAKAAKI (JP)
KISHI NORITAKA (JP)
MORI TAKAAKI (JP)
Application Number:
PCT/JP2020/013578
Publication Date:
March 04, 2021
Filing Date:
March 26, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
B06B1/06; G03B17/02; G03B17/08
Domestic Patent References:
| WO2019130623A1 | 2019-07-04 | |||
| WO2017022382A1 | 2017-02-09 | |||
| WO2017110564A1 | 2017-06-29 | |||
| WO2019030982A1 | 2019-02-14 | |||
| WO2018207395A1 | 2018-11-15 | |||
| WO2018198465A1 | 2018-11-01 |
Foreign References:
| JP2017170303A | 2017-09-28 | |||
| JP2013080177A | 2013-05-02 | |||
| JP2006214779A | 2006-08-17 | |||
| JPH09308276A | 1997-11-28 | |||
| JP2017229008A | 2017-12-28 | |||
| JP2012039754A | 2012-02-23 | |||
| JP2010161615A | 2010-07-22 | |||
| JP2017085276A | 2017-05-18 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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