Title:
ULTRASONIC TRANSDUCER AND MANUFACTURING METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2020/170286
Kind Code:
A1
Abstract:
An ultrasonic transducer according to the present invention comprises an elastic plate capable of vibrating in the plate thickness direction, a plurality of piezoelectric elements secured in a parallel state to the first surface of the elastic plate, and a sealing member made of a polymer material that covers the plurality of piezoelectric elements, the elastic plate including a plurality of vibration regions to which the plurality of piezoelectric elements are respectively fitted, a plurality of low-rigidity regions respectively enclosing the plurality of vibration region, a plurality of constraint regions respectively enclosing the plurality of low-rigidity regions, and a boundary region for defining one constraint region and an external region located radially outward of the one constraint region, the boundary region having a slit part for separating the one constraint region and the external region and a bridge part for mechanically connecting the one constraint region to the external region. The sealing member has a plurality of cylindrical parts respectively enclosing the plurality of piezoelectric elements in a plan view, the base end faces of the cylindrical parts being joined to the first surface of the elastic plate at positions crossing the slit part, a plurality of closing parts respectively closing up the free-end side of the plurality of cylindrical parts, and a filling part extending from the base end faces of the cylindrical parts to the slit part.
Inventors:
TAKASUGI SATORU (JP)
Application Number:
PCT/JP2019/005744
Publication Date:
August 27, 2020
Filing Date:
February 18, 2019
Export Citation:
Assignee:
SUNCALL CORP (JP)
International Classes:
H04R17/00; G01S7/521; H04R31/00
Domestic Patent References:
| WO2007099696A1 | 2007-09-07 |
Foreign References:
| JP2017099566A | 2017-06-08 | |||
| US20130336095A1 | 2013-12-19 |
Attorney, Agent or Firm:
ARAWORE INTERNATIONAL IP LAW FIRM (JP)
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