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:
Mar. 12, 1996
Filed:
Feb. 17, 1995
Satoshi Sakamoto, Tokyo, JP;
Eiji Ohshima, Kanagawa, JP;
Hiroshi Kawamura, Tokyo, JP;
Shinichi Orimo, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An electromagnetic actuator for moving a focusing lens along an optical axis includes a lens barrel having two supporting rails, a set of cylindrical inner and outer yokes incorporating a pair of magnets, a lens holder which holds the lens and is supported slidably on the supporting rails by means of a bearing device and rail guide provided on two arms of the lens holder, a coil wound on a bobbin which is fixed on the lens holder and located so that the coil is exposed to the magnetic field of the magnets inside the yokes. The yokes have cut portions, allowing the arms of lens holder to cut into the yokes when the lens is moved.