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:
Nov. 22, 2005
Filed:
Apr. 06, 2004
Applicants:
Tomoya Takei, Tokyo, JP;
Shinichi Orimo, Kanagawa, JP;
Inventors:
Tomoya Takei, Tokyo, JP;
Shinichi Orimo, Kanagawa, JP;
Assignee:
Sony Corporation, , JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B003/10 ; G02B007/02 ; H02K041/035 ;
U.S. Cl.
CPC ...
Abstract
To enable the thrust of a linear actuator comprised of a driving magnet and a drive coil to act in a fixed and stable manner, the present invention is a lens driving device that comprises a driven body supporting an optical lens capable of freely moving along an optical axis direction, a drive coil fitted to the driven body, and a magnet having a surface set so as to have a prescribed gap with the moving drive coil, wherein a gap between the surface of the magnet and the drive coil is set in such a manner as to be broader at a central part of the range of movement of the drive coil than at an end part.