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. 18, 2014
Filed:
Feb. 08, 2011
Yoshiaki Yamauchi, Omitama, JP;
Tatsuya Yamasaki, Hitachinaka, JP;
Nozomu Harada, Kawasaki, JP;
Sojiro Kirihara, Kawasaki, JP;
Ikuo Nishida, Ebina, JP;
Yoshiaki Yamauchi, Omitama, JP;
Tatsuya Yamasaki, Hitachinaka, JP;
Nozomu Harada, Kawasaki, JP;
Sojiro Kirihara, Kawasaki, JP;
Ikuo Nishida, Ebina, JP;
Hitachi Consumer Electronics Co., Ltd., Tokyo, JP;
Hitachi-LG Data Storage, Inc., Tokyo, JP;
Abstract
In an optical disc drive, a degradation of traveling performance of an optical pickup under hard acceleration or hard deceleration in a random access operation or the like results in a degradation of recording/reproducing performance. Groove structure is provided between two gears of a guide feed provided in an optical pickup, and the groove forms bending structure. Thus, the engagement state between a screw gear and the gears of the guide feed is stabilized. This makes it possible to prevent tooth jumping and step-out from occurring in the gears during the traveling of the optical pickup, achieving stable traveling. In consequence, the recoding/reproducing performance of the optical disc drive can be improved.