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. 14, 1987
Filed:
Apr. 23, 1985
Toshihiko Kurihara, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A lens driving device for an optical pickup unit includes a support structure for supporting an objective lens so that its optical axis is perpendicular to the surface of a recording medium while movements in the direction of the optical axis and in a direction perpendicular to the optical axis are permitted. The device further includes a driving structure for driving the objective lens in the direction of the optical axis and in the direction perpendicular to the optical axis respectively. The driving structure is made up of a magnetic circuit which forms a gap in which first and second coils connected to the objective lens are disposed so that driving forces in the direction of the optical axis and in the direction perpendicular to the optical axis are independently produced when suitable driving currents are supplied to the first and second coils.