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:
Sep. 02, 2008
Filed:
Apr. 19, 2005
Manabu Ochi, Fujisawa, JP;
Hirofumi Taguchi, Yokohama, JP;
Hiroyuki Toyoda, Chiyoda, JP;
Hitachi Media Electronics Co., Ltd., Mizusawa-Shi, JP;
Abstract
An optical pickup device comprises a semiconductor laser that causes outgoing of laser beam used for reproduction and recording of information on an optical disk, and an objective lens that conducts the laser beam outgoing from the semiconductor laser to the optical disk. The objective lens is driven by a yoke, a focusing coil, a tracking coil, etc. These elements are accommodated in a pickup housing. First and second bearing portions supporting the pickup housing to make the same movable are attached to the pickup housing and arranged on both sides with the objective lens therebetween. The yoke is thermally connected to the first bearing portion positioned on an opposite side of the yoke to the semiconductor laser.