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:
Oct. 02, 2007
Filed:
Apr. 26, 2006
Applicants:
Jun Suzuki, Tokorozawa, JP;
Eiji Kuroki, Tokorozawa, JP;
Kazutaka Goami, Tokorozawa, JP;
Inventors:
Assignee:
Pioneer Corporation, Tokyo-to, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A magnet used for an actuator of an optical pickup has a magnetization pattern has two different pole areas adjacent with each other. At a corner part defined by the boundary line of the two pole areas, the pole area inside the corner part has a projection area, projecting in the direction of the pole area outside the corner part. Owing to the existence of the projection area, insufficiency of the magnetic flux density at the corner part particularly close to the vertex can be improved so that a desirable magnetic field can be provided to the printed coil substrate disposed in the vicinity of the magnet.