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. 23, 2013
Filed:
Aug. 13, 2009
Yoshiaki Yamauchi, Omitama, JP;
Takayuki Fujimoto, Tsuchiura, JP;
Shinya Tsubota, Mito, JP;
Makoto Ibe, Hitachinaka, JP;
Nozomu Harada, Kawasaki, JP;
Seiji Hamaie, Kawasaki, JP;
Shinya Asano, Tokyo, JP;
Yoshiaki Yamauchi, Omitama, JP;
Takayuki Fujimoto, Tsuchiura, JP;
Shinya Tsubota, Mito, JP;
Makoto Ibe, Hitachinaka, JP;
Nozomu Harada, Kawasaki, JP;
Seiji Hamaie, Kawasaki, JP;
Shinya Asano, Tokyo, JP;
Hitachi Consumer Electronics Co., Ltd., Tokyo, JP;
Hitachi-LG Data Storage, Inc., Tokyo, JP;
Abstract
A disc drive apparatus comprises: a spindle motorfor hold a discand for rotate it; an optical headfor conducting either one of recording or reproducing of information onto/from the disc; a driver unit for moving the optical head in a radial direction of the disc; and a unit mechanism chassisfor supporting those thereon, fixedly, wherein the spindle motor is constructed with a rotational drive means made of a magnetic circuit, a rotor portion and a rotation shaft, which define a rotation body, and a spindle motor attachment plate to hold those thereon, and the spindle motor attachment plate has a semi-circular shaped plate configuration in a part thereof, nearly fitting to an outer diameter the rotor portion, in a direction where the optical head is provided, and has a step-like structure in thickness direction of the plate thereof, within a semi-circular shaped region with respect to a line connecting between corner portions on both ends of that semi-circular shape, and also bridging over that line.