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. 11, 2002
Filed:
Jun. 04, 1999
Akihiko Makita, Akashi, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical disk drive has a swing arm that is pivotally supported and upon which is mounted an optical head. The optical head illuminates a small laser beam spot, through an objective lens, onto an optical disk. The swing arm is rotated around a pivotable supporting assembly by a rotary motor through a gear train. One of the gears in the gear train is mounted on a tip of the arm. The arm is stably supported at two portions—one portion being the pivotable supporting assembly and the other portion being the rotary motor cooperating with the gear train. One of gears in the gear train preferably has a backlash eliminator including a plurality of associated gears, one of which is elastically suspended by a biasing element that applies a force in a constant direction. The rotary motion of the rotary motor is transferred to arm-rotation without slippage. The drive has an electromagnet, which applies a magnetic field onto the disk and is mounted a position opposite to the objective lens with respect to the disk.