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:
Feb. 03, 1998
Filed:
Dec. 21, 1995
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An objective lens driving apparatus for driving, in a focus direction and a tracking control direction, an objective lens for converging light onto an optical recording medium, includes a lens bobbin for holding the objective lens. The lens bobbin is provided with two types of drive coils for driving the lens bobbin in the focus and tracking control directions. The lens bobbin is attached in a floating state to a magnetic yoke by a pair of suspensions functioning as cantilevers. The magnetic yoke is provided with a magnet for generating a magnetic field. The lens bobbin is situated such that the drive coils are placed within the magnetic field. Each of the suspensions consists essentially of a rectangular metal frame having a plurality of plate spring portions defined in planes perpendicular to the focus and tracking control directions. A number of through holes are formed in the plate spring portions.