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, 2011
Filed:
Jun. 06, 2006
Takeshi Nishimura, Tokyo, JP;
Masato Sorimachi, Tokyo, JP;
Yuuzo Nakajima, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
Kiyoshi Ootani, Hyogo, JP;
Akira Nishikawa, Hyogo, JP;
Yuichi Nakajima, Hyogo, JP;
Kiyosei Shibata, Hyogo, JP;
Takeshi Nishimura, Tokyo, JP;
Masato Sorimachi, Tokyo, JP;
Yuuzo Nakajima, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
Kiyoshi Ootani, Hyogo, JP;
Akira Nishikawa, Hyogo, JP;
Yuichi Nakajima, Hyogo, JP;
Kiyosei Shibata, Hyogo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Fujitsu Ten Limited, Kobe-shi, JP;
Abstract
A flat speaker comprising a vibrating plate including a spiral voice coil, a lead portion extracted from the vice coil and reinforced by the reinforcing member, and an electric supply line; an edge portion supporting the vibrating plate; and a yoke, supporting the edge portion, on which the permanent magnet arranged to face the voice coil. The flat speakerof the invention includes a vibrating membraneof an insulating base filmwith a spiral or meandering voice coilformed on one or both faces thereof, a permanent magnetarranged on corresponding location facing the voice coil; and a yokeon which the permanent magnetis arranged. The vibrating membraneis avoided from hitting the permanent magnet by providing a perforated sheet on the back face of the yoke to control acoustic resistance.