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:
Aug. 27, 2013
Filed:
Oct. 20, 2009
Mitsukazu Kuze, Mie, JP;
Takehiko Tanabu, Mie, JP;
Satoshi Itoh, Mie, JP;
Masashi Kawabe, Mie, JP;
Mamiko Tsutsumi, Mie, JP;
Mitsukazu Kuze, Mie, JP;
Takehiko Tanabu, Mie, JP;
Satoshi Itoh, Mie, JP;
Masashi Kawabe, Mie, JP;
Mamiko Tsutsumi, Mie, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In a loud speaker, the diaphragm has a protruded part protruding on a yoke side on the inside and in the vicinity of an inner coupling part as a coupled portion to a voice coil. The loud speaker can be manufactured with the voice coil accurately positioned with respect to a diaphragm, and the voice coil is accurately vibrated vertically inside a magnetic gap. The possibility of the voice coil coming into contact with a plate and a yoke as a magnetic circuit body of the loud speaker can be reduced, thereby to improve production efficiency and a yield at the time of manufacturing the loud speaker.