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. 30, 1996
Filed:
Oct. 27, 1994
Sony Corporation, Tokyo, JP;
Abstract
According to the electromagnetic driving device of the present invention, since it has a fixed member having an outside yoke and an inside yoke, a magnet for generating the thrust being bonded on either side of the outside yoke or inside yoke, and a movable member having a driven holding body portion for holding a body to be driven, and a coil wound in more than two phases in an axial direction between said outside yoke and inside yoke, and is movable in an axial direction with respect to the fixed member, in which a body to be detected is provided in said movable member, and a position-detecting element is provided in the fixed member which detects the magnetic field of said magnet and detects the position of the movable member to generate a position-detecting signal for controlling the current supply to the coil, any restrictions of the moving range and any decrease in the moving speed due to wiring and the like of the movable member are not caused, and smooth movements according to the current supply to the coil can be provided, with respect to the position detection of the movable member.