JPS605490A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPS605490A JPS605490A JP11239983A JP11239983A JPS605490A JP S605490 A JPS605490 A JP S605490A JP 11239983 A JP11239983 A JP 11239983A JP 11239983 A JP11239983 A JP 11239983A JP S605490 A JPS605490 A JP S605490A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- bearing
- fixed
- fluid
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
- G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
Description
【発明の詳細な説明】
（ａｔ 発明の技術分野
本発明は回転駆動される媒体に記録再生を行う磁気ディ
スク装置に係シ、特に媒体全回転するスピンドル部の回
転軸に磁性シールが設けられた磁気ディスク装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a magnetic disk device that performs recording and reproduction on a rotationally driven medium, and in particular, to a magnetic disk device in which a magnetic seal is provided on the rotating shaft of a spindle unit that rotates the entire medium. Related to magnetic disk devices.
（ｂ） 従来技術と問題点
回転される円板状の媒体の記録再生すべき所定トラック
を選択して磁気ヘッドによって記録再生を行う磁気ディ
スク装置は第１図に示すように構成されている。第１図
は従来の磁気ディスク装置の概略を示す（ａ）は斜視図
、（ｂ）は側面図、（Ｃ）は磁気シールの詳細図である
。(b) Prior Art and Problems A magnetic disk device which selects a predetermined track on a rotating disc-shaped medium to be recorded and reproduced and performs recording and reproduction using a magnetic head is constructed as shown in FIG. FIG. 1 schematically shows a conventional magnetic disk drive, with (a) a perspective view, (b) a side view, and (C) a detailed view of a magnetic seal.
従来の磁気ディスク装置は（ａ）（ｂｌに示すように、
ＤＣモータ３の回転駆動によって回転されるスピンドル
部２０回転軸２Ａ、２Ｂに固着された）・プ５Ａ、５Ｂ
Ｋは円板状の匹体４が複数個それぞれ所定間隔で固着さ
れておシ、媒体４はＤ −１）軸を中心に矢印Ａに示す
方向に回転される。この回転軸２ＡはカバＩＡ’ｔｊ￥
通せしめるように設けられ、カバＩＡに固着されたベア
リング７によって両端部が回転自在に保持され、また、
回転軸２Ｂはフレーム１０に固着された軸受１１を介し
て固着されたベアリング７Ａ、７Ｂによって回転自在に
保持されている。ベアリング７Ｂはスプリング１２の圧
縮力が加わり回転軸２Ｂの係正にガタが生じないように
されている。As shown in (a) (bl), the conventional magnetic disk device is
spindle portion 20 which is rotated by the rotational drive of the DC motor 3;
K has a plurality of disc-shaped bodies 4 fixed at predetermined intervals, and the medium 4 is rotated in the direction shown by arrow A around the D-1) axis. This rotating shaft 2A is a cover IA'tj\
Both ends are rotatably held by bearings 7 fixed to the cover IA, and
The rotating shaft 2B is rotatably held by bearings 7A and 7B fixed to the frame 10 via a bearing 11. The compressive force of the spring 12 is applied to the bearing 7B, so that no looseness occurs in the engagement of the rotating shaft 2B.
このｆＩｌ：体４の記録再生は媒体４が回転されること
で、アクチュエータ機構に固着された磁気ヘッド（図示
されていない）全浮上させ、媒体４の記録面と磁気ヘッ
ドのスライダとの間に所定間隙が形成され記録再生が行
なわれる。この間隙は高密度記録に伴ない極力徽小間隙
になるように配慮されている。The recording/reproduction of the fIl: body 4 is performed by rotating the medium 4, so that the magnetic head (not shown) fixed to the actuator mechanism is completely lifted up, and between the recording surface of the medium 4 and the slider of the magnetic head. A predetermined gap is formed and recording/reproduction is performed. This gap is designed to be as small as possible due to high-density recording.
そこで、媒体４が位置された部屋１は外気による鳳埃が
混入されないように完全に密閉構造にすることが重要で
ある。（ａ）の場合はカバーＩＡは一体構造で構成し、
カバーＩＡの貫通部の貫通孔と回転＠２Ａとの間隙には
磁性シール６が設けられ、また、（ｂ）の場合はフレー
ム１０にカバーＩＢを覆うように設け、軸受１１と回転
軸２Ｂとの間隙には前述と同様に磁性シール６が設けら
れ、部屋■は外気よりｇ蔽するように形成されている。Therefore, it is important that the room 1 in which the medium 4 is located has a completely sealed structure so that dust from the outside air is not mixed in. In the case of (a), the cover IA is composed of an integral structure,
A magnetic seal 6 is provided in the gap between the through hole of the penetration part of the cover IA and the rotation @2A, and in the case of (b), it is provided on the frame 10 so as to cover the cover IB, and the bearing 11 and the rotation shaft 2B are A magnetic seal 6 is provided in the gap as described above, and the room (2) is formed so as to be shielded from the outside air.
また、カバーＩＡ、ＩＢの外周面には媒体４の回転によ
る部／Ｍｌの発熱が放熱されるようにツイーンＩＡ−１
，ＩＢ−１が設けられている。更に、部Ｊｕｌの圧力ｔ
−調整するために、例えｉｆ （ｂ）に示すようにカバ
ーＩＢの外周に部屋ｌの中に外気を取り込む呼吸フィル
タ１３と呼吸孔１４とが設けらｉＬ１外気は呼吸フィル
タ１３によってろ過されて取９込まれるように構成され
ている。In addition, the outer peripheral surfaces of the covers IA and IB are provided with Tween IA-1 so that the heat generated by the rotation of the medium 4 is radiated.
, IB-1 are provided. Furthermore, the pressure t in part Jul
- In order to adjust, for example, as shown in if (b), a breathing filter 13 and a breathing hole 14 are provided on the outer periphery of the cover IB to take outside air into the room l. 9.
磁性シール６は（ｃ）に示すように磁石６ＡのＮ、Ｓ極
性にリング状に形成した継鉄６Ｂｔ回転軸２Ａ。The magnetic seal 6 is a yoke 6Bt rotating shaft 2A formed in a ring shape with the N and S polarities of the magnet 6A as shown in (c).
２Ｂの外周に近接されるように突起させて固着し、磁石
６Ａｆ、カバーＩＡまたは軸受１１の部材に固着して構
成されている。この磁石６Ａによりて矢印Ｇに示す磁束
が形成され、継鉄６Ｂの中間に磁性粉と油とを混自して
形成された磁性流体６０ｆ：注入することで、磁性流体
６Ｃは磁束に沿って拘束され、回転軸２Ａ、２Ｂの外周
と継鉄６Ｂの先端との間隙Ｅに被膜が形成される。この
ような被膜が形成されると、外部０より部屋■に矢印Ｃ
に示す外気の流れ込みｔ−ａ蔽する。The magnet 2B is protruded and fixed to the outer periphery of the magnet 2B, and is fixed to the magnet 6Af, the cover IA, or the bearing 11. A magnetic flux shown by an arrow G is formed by this magnet 6A, and by injecting a magnetic fluid 60f formed by mixing magnetic powder and oil into the middle of the yoke 6B, the magnetic fluid 6C flows along the magnetic flux. A film is formed in the gap E between the outer periphery of the rotating shafts 2A, 2B and the tip of the yoke 6B. When such a film is formed, an arrow C is drawn from the outside 0 to the room ■.
The inflow of outside air shown in t-a is covered.
この被膜は回転軸２Ａ、２Ｂの矢印Ａに示す回転が行な
われても磁性流体６Ｃの粘性および磁束の拘束力により
て破壊されないように形成される。This coating is formed so that it will not be destroyed by the viscosity of the magnetic fluid 6C and the binding force of the magnetic flux even if the rotating shafts 2A, 2B are rotated as shown by the arrow A.
しかし、発熱などによって温度が上昇すると、磁性流体
６Ｃの粘性が弱くなること又、（ｃ凧示すように回転軸
２Ａ、２Ｂが水平に位置する状態で長時間放置されると
重力によって磁性流体６Ｃは下面に溜り、回転軸２Ａ、
２Ｂの回転時に矢印Ｆに示す磁性流体６・Ｃのう１ζ沫
が生じる欠点を有していた。However, when the temperature rises due to heat generation, etc., the viscosity of the magnetic fluid 6C becomes weaker, and if the rotating shafts 2A and 2B are left horizontally for a long time as shown in (c), gravity will cause the magnetic fluid 6C to weaken. accumulates on the bottom surface, and the rotating shaft 2A,
This had the disadvantage that droplets of magnetic fluid 6.C, as shown by arrow F, were generated during rotation of 2B.
このように磁性流体６ｃの飛沫が発生すると、飛沫され
た磁性流体６Ｃが媒体４の記録面に付着しヘッドクラッ
シュ表どの障害となる問題を有していた。When the magnetic fluid 6c is splashed in this manner, the splashed magnetic fluid 6C adheres to the recording surface of the medium 4, causing problems such as head crashes.
（ｃ） 発明の目的
本発明の目的は磁性シールよ）飛沫された磁性流体が媒
体の配置された部屋内に入シ込むのを防止し、前述の問
題点を除去したもの又、飛散状態の確認及び組立後の補
充が可能となるものを提供するものである。(c) Purpose of the Invention The purpose of the present invention is to prevent the splashed magnetic fluid from entering the room where the medium is placed (magnetic seal), and to eliminate the above-mentioned problems and to prevent the splashed magnetic fluid from entering the room where the medium is placed. This provides something that allows for confirmation and replenishment after assembly.
（ｄｌ 発明の構成
本発明の目的は、か＼る磁気ディスク装置において、回
転軸が回転自在に保持される軸受部にはベアリングと、
該回転軸が貫通される貫通孔と該回転軸の外周との間隙
に磁性流体が充填される磁性シールとを備えると共に、
該ベアリングと該磁性シールとは該回転軸の軸方向に対
して媒体の固着側より核ベアリング次ぎに、該磁性シー
ルの順序で配設されることを特徴とする磁気ディスク装
置により達成される。(dl Structure of the Invention The object of the present invention is to provide such a magnetic disk device with a bearing in which a rotating shaft is rotatably held;
a magnetic seal in which a magnetic fluid is filled in a gap between a through hole through which the rotating shaft passes and an outer periphery of the rotating shaft;
This is achieved by a magnetic disk device characterized in that the bearing and the magnetic seal are arranged in this order from the side to which the medium is fixed with respect to the axial direction of the rotating shaft: the core bearing, then the magnetic seal.
（ｅ） 発明の実施例 以下本発明を第２図を参考に詳細に説明する。(e) Examples of the invention The present invention will be explained in detail below with reference to FIG.
第２図の（ａ）は本発明による磁気グイスフ装置の一実
施例を示す側面図（ｂ）は磁性シールの詳細図である。FIG. 2(a) is a side view of one embodiment of the magnetic seal device according to the present invention, and FIG. 2(b) is a detailed view of the magnetic seal.
スピンドル部２２０回転軸２２Ａの一端にはハブ２５が
回着され、池端にはＤＣモータ２３のロータ２３Ａが固
着され、中間部はフレーム２０に固着された軸受１１に
設けられたベアリング７Ａ。A hub 25 is rotatably attached to one end of the rotating shaft 22A of the spindle portion 220, a rotor 23A of a DC motor 23 is fixed to the end thereof, and a bearing 7A is provided in the bearing 11 fixed to the frame 20 at the intermediate portion.
７Ｂによって回転自在に保持されている。It is rotatably held by 7B.
ハブ２５には複数の媒体４が所定間隔で固着されており
、ロータ２３Ａの外周にはコイル２３Ｂが固着されてい
る。軸受１１に設けられたベアリング７Ｂ、７Ｂはイン
チ側が回転＠２２Ａに圧入されベアリング７Ｂのアクタ
側は軸受１１に固着された押え金具２９とスゲリング１
２の圧縮力とによって挾持されることで係止されている
。また、磁性シール６はベアリング７Ａの固着箇所とロ
ータ２３の固着Ｗ！ｉ所の間に固着されている。カバー
２１は媒体４を覆う密閉室Ｉを形成するようにフレーム
２０に固着され、カバー２１の外周には放熱用のツイー
ン２１Ａ、外気を取り込む呼吸フィルタ１３と呼吸孔１
４および密閉室１内の湿度を吸収する乾燥剤が収納さｎ
るケース２１Ｂが設けられている。更に、回転軸２２Ａ
の先端には静電気を除去するためのアースバ２８が設け
られている。A plurality of media 4 are fixed to the hub 25 at predetermined intervals, and a coil 23B is fixed to the outer periphery of the rotor 23A. The inch side of the bearings 7B, 7B installed in the bearing 11 is press-fitted into the rotation @ 22A, and the actor side of the bearing 7B is fitted with the presser metal fitting 29 fixed to the bearing 11 and the sugering 1.
It is locked by being clamped by the compressive force of 2. Also, the magnetic seal 6 is fixed to the bearing 7A and the rotor 23 W! It is fixed between the i places. The cover 21 is fixed to the frame 20 so as to form a sealed chamber I covering the medium 4, and the cover 21 has a tween 21A for heat radiation, a breathing filter 13 for taking in outside air, and a breathing hole 1 on the outer periphery of the cover 21.
4 and a desiccant that absorbs the humidity in the sealed room 1 are stored.
A case 21B is provided. Furthermore, the rotating shaft 22A
An earth bar 28 for removing static electricity is provided at the tip.
そこで、ロータ２３ＡがＤ−Ｄ軸を中心に矢印入方向に
回転駆動することで媒体４社回転され、前述の磁気ヘッ
ドによって記録再生が行なわれるように構成されている
。Therefore, the rotor 23A is rotated about the DD axis in the direction of the arrow, thereby rotating the four media, and recording and reproducing is performed by the above-mentioned magnetic head.
媒体４が回転されることで、密閉室工の中の空気は遠心
力によりて回転軸２２Ａの近傍より媒体４の外周部に送
風され、送風された空気はカバー２１の内壁に押圧され
、押圧された一部の空気は回転軸２２Ａの近傍に流れ込
み、更に、媒体４の外周部に送風されるように循環され
る。したがって、媒体４の外周部では圧力が高く、回転
軸２２Ａの近傍では圧力は低くなる。また、外気と密閉
室■との温度差によって生じる密閉室Ｉの内部圧力と外
気の圧力との差を調整する必要がある。この調整は密閉
室工の中に外気を取り込むか、または、密閉室Ｉの内部
より外ｔこ空気を排出づ−ることで行なわれる。この取
り込みまたは排出には回転軸２２Ａと軸受１１との間隙
は磁性シール６によりて矢印Ｃに示す外気の泥れ込みま
たは反対に排出することが行なわれないように遮蔽され
ているため、呼吸孔１４と呼吸フィルタ１３とを介して
行なわれる。As the medium 4 is rotated, the air inside the closed chamber is blown from the vicinity of the rotating shaft 22A to the outer periphery of the medium 4 due to centrifugal force, and the blown air is pressed against the inner wall of the cover 21, causing pressure. A part of the air flows into the vicinity of the rotating shaft 22A, and is further circulated so as to be blown around the outer circumference of the medium 4. Therefore, the pressure is high at the outer periphery of the medium 4, and the pressure is low near the rotating shaft 22A. Furthermore, it is necessary to adjust the difference between the internal pressure of the closed chamber I and the pressure of the outside air, which is caused by the temperature difference between the outside air and the closed chamber (1). This adjustment is carried out by introducing outside air into the closed chamber or by exhausting outside air from inside the closed chamber I. For this intake or discharge, the gap between the rotating shaft 22A and the bearing 11 is shielded by a magnetic seal 6 to prevent outside air from entering or being discharged as shown by arrow C. 14 and a breathing filter 13.
このように構成することによって、（ｂ）に示づ−よう
に磁石６Ａの両側面に固着された継鉄６Ｂの先端に磁釆
によりて拘束された磁性流体６Ｃが前述の理由によって
飛沫しても、矢印Ｆ、方向に飛沫されだ磁性流体６Ｃは
ベアリング７Ａが防壁となり赳所され、矢印Ｆ２方向に
飛沫された磁性流体６ｃはＤＣモータυ１１Ｉとなる１
ζめ、磁性流体６ｃが密閉室工の内部に飛散されること
は防止される。With this configuration, as shown in (b), the magnetic fluid 6C bound by the magnetic clasp to the tip of the yoke 6B fixed to both sides of the magnet 6A is not splashed due to the above-mentioned reason. Also, the magnetic fluid 6C that is splashed in the direction of arrow F is used as a barrier by the bearing 7A, and the magnetic fluid 6c that is splashed in the direction of arrow F2 becomes the DC motor υ11I.
Therefore, the magnetic fluid 6c is prevented from being scattered inside the closed chamber.
（ｆ） 発明の詳細
な説明したように、本発明はｉｇｌ伝軸２２Ａを回転自
在に保持するベアリング７Ａ、７Ｂと間隙Ｅを遮蔽する
磁性ンール６とを軸受ｌｌに固着さぞて設けると共に、
磁性シール６の一部お２所はベアリング７Ａの同着箇所
より密閉室工に対して外側に泣ｄするようにしたもので
ある。(f) Detailed Description of the Invention As described above, the present invention provides the bearings 7A and 7B that rotatably hold the igl transmission shaft 22A and the magnetic knob 6 that shields the gap E, which are fixed to the bearing ll, and
Two parts of the magnetic seal 6 are arranged so that they extend outward relative to the closed room construction from where the bearing 7A is attached.
これにより、磁性シールにの仏性流体６ｃが飛沫しても
、ベアリング７Ａｉこよりて遮ぎられ、従来のように密
閉室Ｉの内部に飛散されることはなくまり、したがって
、ヘッドクラッシェ・よどの除害は防止でき実用効果は
大である。As a result, even if the fluid 6c is splashed onto the magnetic seal, it is blocked by the bearing 7Ai and is no longer splashed into the sealed chamber I as in the conventional case. Harm removal can be prevented and has great practical effects.
第１図は従来の磁気ディスク装置の概略・２示す（ａ）
は斜仇図、（ｂ尾側面図、（Ｃ）は磁性７−ルの詳細図
で、第２図の（ａ）は本発明による磁気ディスク装置の
一実施例を示す側面図、（ｂ）は磁性シールの詳細図を
示す。
図中において、ＩＡ、ＩＢ、２１社カバー、２．２２は
スピンドル部、２Ａ、２Ｂ、２２Ａは回転軸、３゜２３
はＤＣモータ、４は媒体、５Ａ、５Ｂ、２５はノ飄プ、
６は磁性シール、７．７Ａ、７Ｂはベアリング。
２８はアースバ、２９は押え金具、１１社軸受。
１２はスプリング、１３は呼吸フィルタ、１４は呼吸孔
を示す。
（０−２
χノ図Figure 1 shows an outline of a conventional magnetic disk device.(a)
2 is a perspective view, (b) is a tail side view, (C) is a detailed view of the magnetic disk, (a) is a side view showing an embodiment of the magnetic disk drive according to the present invention, (b) shows a detailed diagram of the magnetic seal. In the figure, IA, IB, 21 company covers, 2.22 are spindle parts, 2A, 2B, 22A are rotating shafts, 3°23
is the DC motor, 4 is the medium, 5A, 5B, 25 is the knob,
6 is a magnetic seal, 7.7A, 7B are bearings. 28 is an earth bar, 29 is a holding metal fitting, and 11 company bearings. 12 is a spring, 13 is a breathing filter, and 14 is a breathing hole. (0-2 χ diagram
Claims (1)
回転軸を有するスピンドル部と金備えた磁気ティスフ装
置において、前記回転軸を回転自在に保持するベアリン
グと該回転軸が挿入される貫通孔と該回転軸の外Ｊ４と
の間隙に磁性流体が充填される磁性シールとを設けると
共に、該ベアリングと該磁性７−ルどは該回転軸の軸方
向に対して前記媒体の固着側より１該ベアリング、該磁
性シールの順序で配設されグζことを特徴とする磁気デ
ィスク装置。A magnetic tisf device comprising a medium to be recorded and reproduced, a spindle portion having a rotating shaft to which the medium is fixed and rotated, and a bearing for rotatably holding the rotating shaft, and a through hole into which the rotating shaft is inserted. A magnetic seal filled with a magnetic fluid is provided in the gap between the hole and the outside J4 of the rotating shaft, and the bearing and the magnetic 7-rule are arranged in a direction from the side to which the medium is fixed with respect to the axial direction of the rotating shaft. 1. A magnetic disk device characterized in that the bearing and the magnetic seal are arranged in this order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11239983A JPS605490A (en) | 1983-06-22 | 1983-06-22 | Magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11239983A JPS605490A (en) | 1983-06-22 | 1983-06-22 | Magnetic disk device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS605490A true JPS605490A (en) | 1985-01-12 |
| JPH0542755B2 JPH0542755B2 (en) | 1993-06-29 |
Family
ID=14585681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11239983A Granted JPS605490A (en) | 1983-06-22 | 1983-06-22 | Magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS605490A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62141675A (en) * | 1985-12-16 | 1987-06-25 | Seiko Epson Corp | Spindle motor |
| EP0263932A2 (en) * | 1986-10-14 | 1988-04-20 | International Business Machines Corporation | Disk file including a filtration system |
| JPH01133537A (en) * | 1987-11-18 | 1989-05-25 | Nippon Densan Kk | Spindle motor |
| JPH0295612A (en) * | 1988-09-29 | 1990-04-06 | Central Conveyor Kk | Roller and conveyer for roller conveyer |
| US4996613A (en) * | 1987-11-25 | 1991-02-26 | Nippon Densan Corporation | Spindle motor with non-contact seal |
| US5243479A (en) * | 1986-10-22 | 1993-09-07 | Hitachi Ltd. | Mounting structure for information recording and reproducing apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55113177A (en) * | 1979-02-23 | 1980-09-01 | Nec Corp | Air ventilating mechanism of magnetic disk unit |
| JPS57191880A (en) * | 1981-05-22 | 1982-11-25 | Fujitsu Ltd | Magnetic disk device |
-
1983
- 1983-06-22 JP JP11239983A patent/JPS605490A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55113177A (en) * | 1979-02-23 | 1980-09-01 | Nec Corp | Air ventilating mechanism of magnetic disk unit |
| JPS57191880A (en) * | 1981-05-22 | 1982-11-25 | Fujitsu Ltd | Magnetic disk device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62141675A (en) * | 1985-12-16 | 1987-06-25 | Seiko Epson Corp | Spindle motor |
| EP0263932A2 (en) * | 1986-10-14 | 1988-04-20 | International Business Machines Corporation | Disk file including a filtration system |
| US5243479A (en) * | 1986-10-22 | 1993-09-07 | Hitachi Ltd. | Mounting structure for information recording and reproducing apparatus |
| JPH01133537A (en) * | 1987-11-18 | 1989-05-25 | Nippon Densan Kk | Spindle motor |
| US4996613A (en) * | 1987-11-25 | 1991-02-26 | Nippon Densan Corporation | Spindle motor with non-contact seal |
| JPH0295612A (en) * | 1988-09-29 | 1990-04-06 | Central Conveyor Kk | Roller and conveyer for roller conveyer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0542755B2 (en) | 1993-06-29 |
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