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:
Jul. 17, 2007
Filed:
Apr. 08, 2003
Hidetoshi Tanaka, Chiba, JP;
Yuji Shishido, Kanagawa, JP;
Hiroshi Kawamura, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An objective lens drive device () includes a supporting block (), a movable block () for holding an objective lens (), and supporting springs () for connecting the supporting block and the movable block. Elements of the supporting block of the objective lens drive device () are a stationary section (), a supporting shaft (), a tilt drive section (), and tilt drive magnetic circuits (and). The stationary section () is secured to a movable base () that is movable in radial directions of a disc-shaped recording medium (). An axial direction of the supporting shaft () is perpendicular to both focusing directions and tracking directions. The tilt drive section () is rotatably supported at the stationary section through the supporting shaft and is connected to the movable block through the supporting springs. The tilt drive magnetic circuits (and) are used to rotate the tilt drive section with respect to the stationary section.