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:
Mar. 22, 2022
Filed:
Aug. 22, 2018
Foster Electric Company, Limited, Tokyo, JP;
Takayuki Tabata, Tokyo, JP;
Foster Electric Company, Limited, Tokyo, JP;
Abstract
A speaker unit, which can be made thin, includes: a magnetic circuithaving a space serving as a magnetic gap G formed inside a cylindrical portion; a voice coilarranged in the magnetic gap G; and a diaphragmhaving a center holethat penetrates a center of the diaphragm, an outer peripheral portionsupported on a frame, and an inner peripheral portionwhose inner peripheral surface is connected to the voice coil. The cylindrical portionof the magnetic circuitincludes a standing wallformed along a vibration direction A of the diaphragm, and a slit. The inner peripheral portionof the diaphragmincludes an insert hole (a standing wall receiving portion)in which the standing wallis inserted, and an insert portionwhich is inserted in the slit