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:
May. 26, 2009
Filed:
Feb. 21, 2006
Osamu Funahashi, Osaka, JP;
Seiichi Yoshida, Osaka, JP;
Osamu Funahashi, Osaka, JP;
Seiichi Yoshida, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Disclosed is a speaker configured to reduce or eliminate distortions when a diaphragm thereof vertically moves in sound reproduction and which can be downsized. This speaker includes: a cylindrical frame having a bottom face and an open top; a magnetic circuit disposed on a inner bottom face of the frame; a voice coil having a coil portion thereof disposed in a magnetic gap of the magnetic circuit; the diaphragm disposed in an opening of the frame, and fixed to the voice coil along an inner periphery thereof, and to the frame via a first edge along an outer periphery thereof; and a support fixed to the diaphragm on the side of the magnetic circuit at one end and to the vicinity of the magnetic circuit via the second edge on the other end. The first edge is substantially analogous to the second edge in shape with respect to the boundary therebetween.