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:
Sep. 05, 2017
Filed:
Sep. 02, 2015
Taiyo Yuden Co., Ltd., Taito-ku, Tokyo, JP;
TAIYO YUDEN CO., LTD., Tokyo, JP;
Abstract
In an embodiment, an electroacoustic converter (earphone) has an enclosure, piezoelectric sounding body, electromagnetic sounding body, and passage. The piezoelectric sounding bodyincludes a vibration platehaving a periphery supported directly or indirectly on the enclosure, and a piezoelectric elementplaced at least on one side of the vibration plate. The piezoelectric sounding bodydivides the interior of the enclosureinto a first space Sand a second space S. The electromagnetic sounding bodyis placed in the first space S. A passageis provided in or around the piezoelectric sounding body, to connect the first space Sand second space S. The electroacoustic converter is capable of obtaining desired frequency characteristics easily.