JPH02177057A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPH02177057A
JPH02177057A JP63333047A JP33304788A JPH02177057A JP H02177057 A JPH02177057 A JP H02177057A JP 63333047 A JP63333047 A JP 63333047A JP 33304788 A JP33304788 A JP 33304788A JP H02177057 A JPH02177057 A JP H02177057A
Authority
JP
Japan
Prior art keywords
base plate
magnetic
magnetic fluid
magnetic disk
spindle
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.)
Pending
Application number
JP63333047A
Other languages
Japanese (ja)
Inventor
Hiroshi Koriyama
郡山　博
Junichi Sasahara
笹原　淳一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, NEC Engineering Ltd filed Critical NEC Corp
Priority to JP63333047A priority Critical patent/JPH02177057A/en
Publication of JPH02177057A publication Critical patent/JPH02177057A/en
Pending legal-status Critical Current

Links

Landscapes

  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Sealing Devices (AREA)
  • Sealing Of Bearings (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To prevent head clash between a magnetic disk and a magnetic head by providing at least one labyrinth seal or over between a magnetic fluid seal and the inside of a base plate. CONSTITUTION:A bearing housing 1 supporting a shaft of a spindle 3 freely turnably is provided at both ends of the shaft and a magnetic fluid seal 6 is fitted between the bearing 2 and the base plate 5 to keep the sealing between the inside and the outside of the base plate. A labyrinth seal 7 forming a labyrinth through the combination of ruggedness parts is provided between the magnetic fluid seal 6 and the inside of the base plate 5 and if the magnetic fluid of the magnetic fluid seal is scattered, the invasion of the magnetic fluid in the inside of the base plate 5 is prevented. Thus, a failure such as head clash due to the scattered magnetic fluid is prevented.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は磁気ディスク装置に関し、特に磁気ディスクを
搭載したスピンドルをベースプレートの中に密封して収
容した磁気ディスク装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device in which a spindle carrying a magnetic disk is hermetically housed in a base plate.

〔従来の技術〕[Conventional technology]

磁気ディスクを搭載したスピンドルをベースプレートの
中に密封して収容した従来の磁気ディスク装置は、第２
図に示すように、ベアリングハウジング１１およびベア
リング１２によって支持されて回転するスピンドル１３
に等間隔に積層して搭載した磁気ディスク１４をベース
プレート１５の中に内蔵しており、外部との間を密封さ
れている。この磁気ディスク１４上に情報の記録または
再生を行うため、スピンドル１３は回転するが、その回
転軸（シャフト）の両端部には磁性流体シール１６を設
けて、ベースプレート１５の内部と外部との間の密封を
保っている。A conventional magnetic disk device, in which a spindle carrying a magnetic disk is hermetically housed in a base plate, has a second
As shown in the figure, a spindle 13 is supported and rotates by a bearing housing 11 and a bearing 12.
Magnetic disks 14 stacked and mounted at equal intervals are housed in a base plate 15, and are sealed from the outside. In order to record or reproduce information on the magnetic disk 14, the spindle 13 rotates, and magnetic fluid seals 16 are provided at both ends of the rotating shaft to connect the inside and outside of the base plate 15. is kept sealed.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述したように、従来の磁気ディスク装置は、磁気ディ
スクを密封するために磁性流体シールを用いているが、
スピンドルのシャフトの表面の精度や傷や磁性液体の注
入量の多少や熱の影響による空気の膨張等から影響を受
け、磁性液体が漏れたり飛散したりするため、磁気ディ
スク装置の内部に磁性流体が入り込んで磁気ディスクに
よる情報の記録または再生が不可能となるばかりでなく
、サブミクロンオーダの粒子となって磁気ディスクの上
に浮遊し、これが記録や再生を行なっている磁気ヘッド
に付着して磁気ディスクの損傷（いわゆるヘッドクラッ
シュ）を発生させるという欠点を有している。As mentioned above, conventional magnetic disk drives use magnetic fluid seals to seal magnetic disks.
The magnetic fluid may leak or scatter due to the precision and scratches on the surface of the spindle shaft, the amount of magnetic fluid injected, the expansion of air due to the influence of heat, etc. Not only do these particles get into the magnetic disk, making it impossible to record or read information on the magnetic disk, but they also become submicron-order particles that float on the magnetic disk and attach to the magnetic head that is recording and reproducing them. This has the disadvantage of causing damage to the magnetic disk (so-called head crash).

〔課題を解決するための手段〕[Means to solve the problem]

本発明の磁気ディスク装置は、複数枚の磁気ディスクを
一定の間隔に積層して保持するスピンドルと、前記スピ
ンドルを内蔵してベアリングによって回転自在に支持す
るベースプレートと、前記スピンドルのシャフトの両端
部に取付けられて前記ベースプレートの内部と外部との
間をシールする磁性液体シールとを備える磁気ディスク
装置において、前記ベースプレートの内部と前記スピン
ドルとの間に設けた少くとも１個所以上のラビリンスシ
ールを有している。The magnetic disk device of the present invention includes a spindle that holds a plurality of magnetic disks stacked at regular intervals, a base plate that incorporates the spindle and rotatably supports it with bearings, and a base plate that includes a spindle that is mounted on both ends of a shaft of the spindle. A magnetic disk drive including a magnetic liquid seal attached to the base plate for sealing between the inside and outside of the base plate, the magnetic disk drive having at least one labyrinth seal provided between the inside of the base plate and the spindle. ing.

〔実施例〕 次に本発明の実施例について図面を参照して説明する。〔Example〕 Next, embodiments of the present invention will be described with reference to the drawings.

第１図は本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing one embodiment of the present invention.

本実施例は、第１図に示すように、スピンドル３のシャ
フトの両端には、このシャフトを回転自在に支持するベ
アリングハウジング１およびベアリング２とベースプレ
ート５との間に磁性流体シール６が取付けられており、
これによってベースプレートの内部と外部との間の密封
を保っている。In this embodiment, as shown in FIG. 1, magnetic fluid seals 6 are installed at both ends of the shaft of a spindle 3 between a bearing housing 1 that rotatably supports the shaft, and a bearing 2 and a base plate 5. and
This maintains a seal between the inside and outside of the base plate.

磁性流体シール６とベースプレート５の内部との間には
凹凸部を組合せて迷路状としたラビリンスシール７が設
けてあり、磁性流体シールの磁性流体が飛散した時、磁
性流体がベースプレート５の内部に侵入するのを防いで
いる。これによって飛散磁性流体に起因するヘッドクラ
ッシュ等の障害を防止することができる。A maze-like labyrinth seal 7 is provided between the magnetic fluid seal 6 and the inside of the base plate 5, and when the magnetic fluid of the magnetic fluid seal is scattered, the magnetic fluid flows into the inside of the base plate 5. Preventing intrusion. This makes it possible to prevent problems such as head crashes caused by the scattered magnetic fluid.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の磁性ディスク装置は、磁
性流体シールとベースプレートの内部との間に少なくと
も１個所以上のラビリンスシールを設けることにより、
磁性流体が飛散してベースプレートの内部に、侵入する
のを防ぐことができイ、ため、磁気ディスクと磁気ヘッ
ドとのヘッドクラッシュを防止することができるという
効果がある。As explained above, the magnetic disk device of the present invention provides at least one labyrinth seal between the magnetic fluid seal and the inside of the base plate.
It is possible to prevent the magnetic fluid from scattering and entering the inside of the base plate, which has the effect of preventing a head crash between the magnetic disk and the magnetic head.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の−・実施例を示す断面図、第２図は従
来の磁気ディスク装置の一例を示す断面図である。 １・１１・・・ベアリングハウジング、２・１２・・・
ベアリング、３・１３・・・スピンドル、４・１４・・
・磁気ディスク、５・１５・・・ベースプレート、６・
１６・・・磁性流体シール、７・・・ラビリンスシール
。 第　　１　固FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing an example of a conventional magnetic disk device. 1.11...Bearing housing, 2.12...
Bearing, 3/13...Spindle, 4/14...
・Magnetic disk, 5.15...Base plate, 6.
16...Magnetic fluid seal, 7...Labyrinth seal. 1st hard

Claims (1)

【特許請求の範囲】[Claims] 複数枚の磁気ディスクを一定の間隔に積層して保持する
スピンドルと、前記スピンドルを内蔵してベアリングに
よって回転自在に支持するベースプレートと、前記スピ
ンドルのシャフトの両端部に取付けられて前記ベースプ
レートの内部と外部との間をシールする磁性液体シール
とを備える磁気ディスク装置において、前記ベースプレ
ートの内部と前記スピンドルとの間に設けた少くとも１
個所以上のラビリンスシールを有することを特徴とする
磁気ディスク装置。A spindle that holds a plurality of magnetic disks stacked at regular intervals; a base plate that houses the spindle and rotatably supports it with bearings; In a magnetic disk drive including a magnetic liquid seal for sealing between the outside and the outside, at least one magnetic liquid seal provided between the inside of the base plate and the spindle.
A magnetic disk device characterized by having labyrinth seals in more than one place.
JP63333047A 1988-12-27 1988-12-27 Magnetic disk device Pending JPH02177057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63333047A JPH02177057A (en) 1988-12-27 1988-12-27 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63333047A JPH02177057A (en) 1988-12-27 1988-12-27 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPH02177057A true JPH02177057A (en) 1990-07-10

Family

ID=18261677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63333047A Pending JPH02177057A (en) 1988-12-27 1988-12-27 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPH02177057A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580041A2 (en) 1992-07-10 1994-01-26 Fuji Photo Film Co., Ltd. Method of processing silver halide photographic material and composition for processing
EP0589460A1 (en) 1992-09-24 1994-03-30 Fuji Photo Film Co., Ltd. Method for processing a black & white silver halide light-sensitive material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580041A2 (en) 1992-07-10 1994-01-26 Fuji Photo Film Co., Ltd. Method of processing silver halide photographic material and composition for processing
EP0589460A1 (en) 1992-09-24 1994-03-30 Fuji Photo Film Co., Ltd. Method for processing a black & white silver halide light-sensitive material

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