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:
Jun. 07, 2011
Filed:
Dec. 21, 2005
Michitaka Oda, Mie, JP;
Shinya Tabata, Mie, JP;
Takenori Yamakawa, Mie, JP;
Yasuhiro Nakanishi, Mie, JP;
Michitaka Oda, Mie, JP;
Shinya Tabata, Mie, JP;
Takenori Yamakawa, Mie, JP;
Yasuhiro Nakanishi, Mie, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A loudspeaker includes the following components: a frame () that has a magnetic circuit () including a magnetic gap () therein; and a diaphragm () that is bonded to a voice coil () fitted into the magnetic gap () in the center thereof, and to the periphery of the frame () along the outer periphery thereof. The magnetic circuit () includes a yoke (), a magnet (), and a top plate (). Tongue-shaped flanges () are disposed at a substantially equidistant spacing in three positions to protrude from the top end face of the yoke (). The total area of these tongue-shaped flanges () in the three positions does not exceed a half of the total area corresponding to the flange part without flanges (). The frame () also includes engaging parts () each for receiving one of the tongue-shaped flanges () therein.