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:
Aug. 16, 2011
Filed:
Oct. 21, 2008
Yoshihiro Satou, Hitachinaka, JP;
Hidenao Saito, Yokohama, JP;
Jun Hato, Fujisawa, JP;
Ryuichiro Mizuno, Fujisawa, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Yoshihiro Satou, Hitachinaka, JP;
Hidenao Saito, Yokohama, JP;
Jun Hato, Fujisawa, JP;
Ryuichiro Mizuno, Fujisawa, JP;
Katsuhiko Kimura, Kasumigaura, JP;
Hitachi Media Electronics Co., Ltd., Iwate, JP;
Abstract
The present invention provides an object lens actuator, an optical pickup, and an optical disk drive, which can increase the size of the object lens actuator driving a lens holder in the tangential tilt direction, and drive and control the lens holder with a small amount of drive current. An object lens actuator comprising a lens holder having an object lens and a first coil; a first magnet fixed to a yoke; plural elastic support parts for supporting said lens holder with a first fulcrum; a moving part for supporting said elastic support parts with a second fulcrum different from said first fulcrum, and a fixed part having a moving mechanism for moving said moving part, wherein said first coil and said first magnet constitute a first magnetic circuit, said first magnetic circuit makes said lens holder movable in a focusing direction, a tracking direction and a radial tilt direction of an optical disk for read/write, and said moving mechanism makes said moving part movable.