JPS62175455U

JPS62175455U -

Info

Publication number: JPS62175455U
Application number: JP6210786U
Authority: JP
Priority date: 1986-04-24
Filing date: 1986-04-24
Publication date: 1987-11-07

Description

[Brief explanation of the drawing]

第１図はこの考案による磁気デイスク装置の一
実施例を示す断縦断面図、第２図は第１図の要部
拡大図、第３図は従来の磁気デイスク装置を示す
縦断面図である。図中、２は保持具、９は回転軸、１０，１１は
玉軸受、１２は磁性流体シール、１４はハブ、１
５は磁気デイスク、２０は筒体である。なお、図
中同一符号は同一部分を示す。 FIG. 1 is a vertical sectional view showing an embodiment of a magnetic disk device according to this invention, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is a vertical sectional view showing a conventional magnetic disk device. . In the figure, 2 is a holder, 9 is a rotating shaft, 10 and 11 are ball bearings, 12 is a magnetic fluid seal, 14 is a hub, 1
5 is a magnetic disk, and 20 is a cylinder. Note that the same reference numerals in the figures indicate the same parts.

補正昭６１．７．２２実用新案登録請求の範囲を次のように補正する
。Amendment July 22, 1981 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】電動機の回転軸に円筒状のハブを固定し、この
ハブに磁気デイスクを入すると共に、上記回転軸
をこれに挿通された玉軸受を介して円筒状の保持
具で支承し、上保持具の上記ハブ側端部内周面に
磁性流体シールを設けたものにおいて、上記保持
具の内周面に高透磁率材料からなる筒体を固定し
、この筒体の内面に上記磁性流体シール及び上記
玉軸受を配置したことを特徴とする磁気デイスク
装置。[Claims for Utility Model Registration] A cylindrical hub is fixed to the rotating shaft of an electric motor, a magnetic disk is inserted into this hub, and the rotating shaft is connected to a cylindrical holder through a ball bearing inserted therein. in which a cylindrical body made of a high magnetic permeability material is fixed to the inner periphery of the holder, and a magnetic fluid seal is provided on the inner circumferential surface of the hub-side end of the upper holder. A magnetic disk device characterized in that the magnetic fluid seal and the ball bearing are arranged in the magnetic disk device.

Claims

[Scope of utility model registration request]

A hub is fixed to the rotating shaft of the electric motor, a magnetic disk is fitted into this hub, and the rotating shaft is supported by a cylindrical holder via a ball bearing inserted through the hub, and the hub side of the holder is supported by a cylindrical holder. In the device in which a magnetic fluid seal is provided on the inner peripheral surface of the end, a cylinder made of a high magnetic permeability material is fixed to the inner peripheral surface of the holder, and the magnetic fluid seal and the ball bearing are arranged on the inner surface of the cylinder. A magnetic disk device characterized by: