The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2002
Filed:
Aug. 01, 2000
Takeshi Kishimoto, Toyama-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A piezoelectric electro-acoustic transducer is constructed such that adherence of a piezoelectric diaphragm to a casing is easily performed, a sufficient supporting strength is achieved, and the piezoelectric diaphragm is supported while hindrance of vibration thereof is minimized. This piezoelectric electro-acoustic transducer includes a piezoelectric diaphragm constructed by adhering a piezoelectric ceramic plate having front and back surfaces including electrodes, onto a metallic plate, and a case in which the piezoelectric diaphragm is accommodated by fixing the peripheral portion thereof with an elastic adhesive. Support portions for supporting the peripheral portion of the piezoelectric diaphragm are provided in the case, and a supporting surface having an arcuate cross-section is provided on the supporting portions so that a center of curvature of the supporting surface is positioned near a lower surface of the peripheral portion of the piezoelectric diaphragm.