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. 11, 2009
Filed:
Dec. 09, 2005
Osamu Funahashi, Osaka, JP;
Seiichi Yoshida, Osaka, JP;
Kimihiro Ando, Mie, JP;
Kazuyoshi Umemura, Mie, JP;
Yoichi Asahi, Aichi, JP;
Osamu Funahashi, Osaka, JP;
Seiichi Yoshida, Osaka, JP;
Kimihiro Ando, Mie, JP;
Kazuyoshi Umemura, Mie, JP;
Yoichi Asahi, Aichi, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The speaker has a frame, a magnetic circuit, a voice coil body and a diaphragm. The magnetic circuit is disposed inside of the frame to form a magnetic gap. The voice coil body is disposed movably in the magnetic gap. The diaphragm is coupled to the voice coil body by an inner periphery edge thereof and to the frame by an outer periphery edge thereof. The outer peripheral surface of a convex portion provided on a bottom of the frame is at least either being brought into contact with or in proximity to the magnetic circuit. The configuration can provide the speaker with excellent heat dissipation characteristics.