Title:
ULTRASONIC SENSOR
Document Type and Number:
WIPO Patent Application WO/2016/147917
Kind Code:
A1
Abstract:
An ultrasonic sensor (103) is provided with a closed-end cylindrical case (1), a piezoelectric element (2i) joined to an inner bottom surface (11a) of the case (1), and a conducting member connected thereto. The piezoelectric element (2i) is provided with a piezoelectric body plate, a first electrode (23) formed on one principal surface thereof, and a second electrode including a second electrode main body formed on the other principal surface of the piezoelectric body plate so as to have an effective vibration region that is a region facing at least part of the first electrode (23) with the piezoelectric body plate therebetween, and a second electrode folded part formed on the one principal surface of the piezoelectric body plate so as to be electrically connected to the second electrode main body. The conducting member is electrically connected individually to the first electrode (23) and the second electrode folded part (26). The outer shape of the piezoelectric element (2i) includes a circular arc part (31), and a linear orientation flat part (32) provided in one or more places so as to be continuous with the circular arc part (31).
Inventors:
NAKANISHI HIROKAZU (JP)
MATSUMOTO TAKU (JP)
MATSUMOTO TAKU (JP)
Application Number:
PCT/JP2016/056840
Publication Date:
September 22, 2016
Filing Date:
March 04, 2016
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04R17/00; H01L41/047; H01L41/113
Domestic Patent References:
| WO2013047544A1 | 2013-04-04 | |||
| WO2014084184A1 | 2014-06-05 |
Foreign References:
| JP2011250327A | 2011-12-08 | |||
| JP2012205184A | 2012-10-22 | |||
| JPS5333089A | 1978-03-28 |
Attorney, Agent or Firm:
Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)
Patent business corporation Fukami patent firm (JP)
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