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. 07, 2006
Filed:
Nov. 21, 2003
Hideaki Sugiura, Yamagata, JP;
Taizo Nakata, Osaka, JP;
Tetsuo Nishikawa, Yamaguchi, JP;
Pioneer Corporation, Tokyo, JP;
Tohoku Pioneer Corporation, Yamagata, JP;
Abstract
In a speaker devicehaving: a magnetic circuitincluding a magnetand a yokea voice coilwhich is placed in a magnetic gapof the magnetic circuitand a diaphragmwhich is vibrating available in a state where the diaphragm is coupled with the voice coila peripheral edge of the diaphragmbeing fixed to a housinga damper holderis disposed in a portion where a damperis attached to the housingThe damper holderis in point contact with the housingvia three or more projectionswhich are disposed on one of the damper holderand the housingPreferably, the damper holderis made of a hybrid material of a resin (polypropylene) and tungsten, and has a specific gravity of 10.0 or larger.