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. 22, 2004
Filed:
Mar. 21, 2002
Kazunari Kato, Iwaki, JP;
Alpine Electronics, Inc., Tokyo, JP;
Abstract
A disc device in which a clamping member for supporting a clamper is pushed against a supporting portion by a holding elastic member. At the side opposite the supporting portion, a clamping elastic member is provided between a drive chassis and the clamping member. The distance from a supporting fulcrum to a portion upon which the elastic force of the clamping elastic member acts is greater than the distance from the supporting fulcrum to a portion upon which a clamping force acts, so that the elastic force of the clamping elastic member for setting the clamping force can be small. Therefore, a large localized force does not act upon the clamping member from the clamping elastic member. In a conventional vehicle-mounted disc device, a spring having a large elastic force is used to exert a clamping force to clamp a disc by a clamper. Therefore, a large localized force acts on a clamping member for supporting the clamper. In addition, a large force is required to lift the clamping member. The present invention solves these problems.