Title:
PIEZOELECTRIC SOUNDER AND ELECTROACOUSTIC CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/194425
Kind Code:
A1
Abstract:
[Problem] To provide a piezoelectric sounder capable of improving sound pressure without decreasing resonance frequency and an electroacoustic conversion device provided therewith.
[Solution] A piezoelectric sounder 30 according to an embodiment of the present invention is provided with a plate member 32, and a plurality of piezoelectric vibration parts 31. The plurality of piezoelectric vibration parts 31 each comprise a diaphragm 311 supported by the plate member 32 so as to be able to vibrate, and a piezoelectric element 312 joined to the diaphragm 311. An electroacoustic conversion device is provided with an electromagnetic sounder 20 and the piezoelectric sounder 30.
Inventors:
DOSHIDA YUTAKA (JP)
Application Number:
PCT/JP2016/056709
Publication Date:
December 08, 2016
Filing Date:
March 04, 2016
Export Citation:
Assignee:
TAIYO YUDEN KK (JP)
International Classes:
H04R17/00; H04R1/06; H04R1/24; H04R1/26; H04R7/04; H04R9/02; H04R23/02
Foreign References:
| JP2012134956A | 2012-07-12 | |||
| JPS58109797U | 1983-07-26 | |||
| JP3196707U | 2015-03-26 |
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