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:
Jan. 29, 2013
Filed:
Mar. 17, 2011
Hiroyuki Takewa, Osaka, JP;
Hiroyuki Takewa, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A speaker includes a diaphragm, edges, at least one voice coil bobbin, a voice coil, and a magnetic circuit. The diaphragmis a long flat plate. The edgesat ends of the diaphragmin a longer-side direction support the diaphragmto vibrate. The voice coil bobbinhas a substantially square pillar shape with a height more than twice as vibrational amplitude of the diaphragm, includes an opening having a periphery connected directly to the diaphragm, and supports the diaphragmto transmit vibration to it. The voice coilis wound around an outer periphery of the voice coil bobbinsubstantially at center in a height direction. The magnetic circuitdrives the voice coil. The long speaker is unlikely to cause breakeup resonance, and has smooth frequency characteristics to offer good sound quality.