JPS5974564U

JPS5974564U - disk drive

Info

Publication number: JPS5974564U
Application number: JP17058582U
Authority: JP
Inventors: 南　喜八郎; 柾彦藤田
Original assignee: 株式会社日立製作所
Priority date: 1982-11-12
Filing date: 1982-11-12
Publication date: 1984-05-21

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、本考案に係る磁気ディスクの断面図、第２図
は、第１図に示す磁気ディスクが回転駆動可能な状態に
セットされた様子を示す模式図、第３図は本考案の他の
実施例の断面図、第４、第５図は同じ（説明斜視図であ
る。１・・・・・・磁気ディスク、２・・・・・・媒体、３
・・・・・・センターハブ、５・・・・・・磁性板、５
Ａ・・・・・・磁性材ピン、６・・・・・・ディスク、
駆動モータ、９・・・・・・回転テーブル、１０・・・
・・・マグネット、１０′・・・・・・多極マグネット
、１５・・・・・・発電線素を備えたプリント基板。FIG. 1 is a cross-sectional view of the magnetic disk according to the present invention, FIG. 2 is a schematic diagram showing the magnetic disk shown in FIG. 1 set in a rotatable state, and FIG. The cross-sectional views of other embodiments, FIGS. 4 and 5 are the same (explanatory perspective views). 1...Magnetic disk, 2...Medium, 3
... Center hub, 5 ... Magnetic plate, 5
A...Magnetic material pin, 6...Disk,
Drive motor, 9...Rotary table, 10...
... Magnet, 10'... Multipolar magnet, 15... Printed circuit board with power generation line element.

Claims

[Scope of utility model registration request]

In a disk drive device that rotatably drives a magnetic disk having a center plate made of a hard material with a magnetic plate on a rotary table equipped with a magnet for attracting the magnetic plate, the magnet is mounted on a rotating table. A disk drive device characterized by magnetizing a pole and thereby obtaining a disk rotation speed detection signal.