JPS61121573U

JPS61121573U -

Info

Publication number: JPS61121573U
Application number: JP504585U
Authority: JP
Priority date: 1985-01-18
Filing date: 1985-01-18
Publication date: 1986-07-31

Description

[Brief explanation of drawings]

第１図ａ，ｂはこの考案の第１実施例を示すも
ので、ａは要部の構成図、ｂはａ図Ｂ―Ｂ線に沿
う断面構成図、第２図は第１実施例の装置におけ
るステツピングモータのシヤフトのラジアル方向
荷重に対するラジアル方向移動量変化をプロツト
したグラフ、第３図ａ，ｂはこの考案の第２の実
施例を示すもので、ａは要部の構成図、ｂはａ図
Ｂ―Ｂ線に沿う断面構成図、第４図ａ，ｂはこの
考案の第３の実施例を示すもので、ａは要部の構
成図、ｂはａ図Ｂ―Ｂ線に沿う断面構成図、第５
図は従来の磁気デイスク装置の平面構成図、第６
図は第５図Ｖ―Ｖ線に沿う断面構成図、第７図は
同磁気デイスク装置のステツピングモータのシヤ
フトのベアリングの作用を説明するための概略構
成図、第８図は従来の磁気デイスク装置における
ステツピングモータのシヤフトのラジアル方向荷
重に対するラジアル方向移動量変化をプロツトし
たグラフである。１…磁気デイスク、２……スピンドル、３……
磁気ヘツド、５……ステツピングモータ、８……
キヤリツジ、２０……シヤフト、２１……ベアリ
ング、２１ａ……インナーレース、２１ｂ…アウ
タレース、２２……リアハウジング、２３……嵌
着凹部、２３ａ……軸方向の内壁、２３ｂ……径
方向の内壁、２４……皿ばね（弾性部材）、２５
……穴、２６……コイルばね（弾性部材）、２７
……環状溝、２８……Ｏ―リング（弾性部材）。 Figures 1a and b show the first embodiment of this invention, where a is a block diagram of the main parts, b is a cross-sectional diagram taken along line B-B in figure a, and Figure 2 is a diagram of the first embodiment. Figures 3a and 3b, which are graphs plotting changes in the amount of radial movement against the radial load of the shaft of the stepping motor in the device, show a second embodiment of this invention, and a is a diagram of the main part; b is a cross-sectional configuration diagram taken along the line B-B in Figure a, Figures 4 a and b show the third embodiment of this invention, where a is a configuration diagram of the main parts, and b is a diagram taken along the line B-B in Figure A. 5th cross-sectional configuration diagram along
The figure is a plan configuration diagram of a conventional magnetic disk device.
The figure is a cross-sectional configuration diagram taken along line V-V in Figure 5, Figure 7 is a schematic configuration diagram for explaining the action of the shaft bearing of the stepping motor of the same magnetic disk device, and Figure 8 is a conventional magnetic disk drive. 3 is a graph plotting changes in the amount of radial movement of the shaft of the stepping motor in the apparatus with respect to the radial load. 1...Magnetic disk, 2...Spindle, 3...
Magnetic head, 5... Stepping motor, 8...
Carriage, 20... Shaft, 21... Bearing, 21a... Inner race, 21b... Outer race, 22... Rear housing, 23... Fitting recess, 23a... Inner wall in axial direction, 23b... Inner wall in radial direction , 24... disk spring (elastic member), 25
... Hole, 26 ... Coil spring (elastic member), 27
...Annular groove, 28...O-ring (elastic member).

Claims

[Claims for Utility Model Registration] A magnetic head attached to a carriage is movably provided on a magnetic disk attached to a spindle of a motor, and the carriage is configured to be moved by a stepping motor, In the radial direction of the shaft, there is a space between a bearing attached to the shaft of the stepping motor and an inner wall in the axial direction of the shaft of a fitting recess formed in the rear or front housing of the stepping motor to fix the bearing. In a magnetic disk device in which an elastic member is interposed to bias the race of the bearing in order to reduce the play between the fitting recess and the bearing in the fitting recess. A magnetic disk device characterized in that an elastic member is interposed to urge the bearing from one side of the inner wall to the other side.