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:
Feb. 28, 2012
Filed:
Feb. 20, 2006
Tomoyasu Takase, Mie, JP;
Mitsutaka Enomoto, Mie, JP;
Kazuya Yamasaki, Osaka, JP;
Kazutaka Kubo, Mie, JP;
Masahide Sumiyama, Mie, JP;
Tomoyasu Takase, Mie, JP;
Mitsutaka Enomoto, Mie, JP;
Kazuya Yamasaki, Osaka, JP;
Kazutaka Kubo, Mie, JP;
Masahide Sumiyama, Mie, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A plate material is drawn into the shape of a rectangular dish and the peripheral border of each corner is press worked. A yoke is fabricated which has an outwardly projecting tongue-like flange provided at a position a predetermined distance below the top end surface. A frame made of resin is insert molded in a manner covering the flange. A magnet is secured inside the yoke and a magnetic circuit having magnetic gap is formed. A diaphragm joined with a voice coil is joined with the frame. By making a loudspeaker in this way, the bonding strength between the yoke and the frame is enhanced and a low-profile loudspeaker is achieved. Also, clearance at each corner of the yoke is eliminated, and a loudspeaker that is free from magnetic flux leakage and excellent both in quality and performance is obtained.