JPH01107366A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPH01107366A JPH01107366A JP26560687A JP26560687A JPH01107366A JP H01107366 A JPH01107366 A JP H01107366A JP 26560687 A JP26560687 A JP 26560687A JP 26560687 A JP26560687 A JP 26560687A JP H01107366 A JPH01107366 A JP H01107366A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- housing base
- spindle
- bearings
- magnetic
- 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
Links
- 239000000314 lubricant Substances 0.000 claims abstract description 12
- 230000007257 malfunction Effects 0.000 abstract description 4
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 101150026536 HDA2 gene Proteins 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
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、特にスピンドル回転
機構部に用いられる軸受の潤滑剤の特性に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk drive, and more particularly to the characteristics of a lubricant for a bearing used in a spindle rotation mechanism.
従来、この種の磁気ディスク装置は、スピンドル回転機
構部に設けられる軸受の潤滑剤は、電気的絶縁特性を有
するグリースを使用しており、スピンドル回転機構部は
アースパッドを介してのみハウジングと導通をとる構成
となっていた。Conventionally, in this type of magnetic disk drive, the lubricant for the bearing provided in the spindle rotation mechanism uses grease that has electrical insulation properties, and the spindle rotation mechanism is electrically connected to the housing only through the ground pad. It was structured to take the following.
上述した従来の磁気ディスク装置は、スピンドル軸受の
潤滑剤が電気的絶縁特性を有する為、磁気ディスク装置
がノンストップで常時スピンドルが回転するシステムで
使用される場合、軸受の内輪と外輪との間に存在する玉
と内外輪との間に潤滑剤の電気的絶縁膜が形成され、内
輪と外輪とが絶縁され、従って内輪と導通する磁気ディ
スクと、外輪と導通するハウジングベース間は絶縁され
、アースパッドを介しての磁気ディスクとハウジングベ
ース間との導通が瞬断現象を起こしたとき、データの書
込み・読出しが不可能になるという欠点がある。In the conventional magnetic disk drive described above, the lubricant in the spindle bearing has electrical insulating properties, so when the magnetic disk drive is used in a system where the spindle constantly rotates non-stop, there is a risk of damage between the inner and outer rings of the bearing. An electrically insulating film of lubricant is formed between the balls present in the inner ring and the inner and outer rings, the inner ring and the outer ring are insulated, and therefore the magnetic disk which is electrically connected to the inner ring and the housing base which is electrically connected to the outer ring are insulated. There is a drawback that when there is a momentary interruption in the conduction between the magnetic disk and the housing base via the ground pad, it becomes impossible to write or read data.
本発明の磁気ディスク装置は、磁気ディスクを支持回転
させるスピンドル回転機構と、該スピンドル回転機構の
スピンドル軸の両端に配置される軸受と、該軸受を介し
て前記スピンドル回転機構を支持するハウジングベース
と、該ノ１ウジングベースに設けられるアースパッドと
、前記磁気ディスクに対して情報の記録・再生を行う磁
気ヘッドと、該磁気ヘッドを保持固定するキャリッジと
を具備する磁気ディスク装置に於て、軸受に電気的導伝
性を有する潤滑剤を用いたことを特徴とする。A magnetic disk device of the present invention includes: a spindle rotation mechanism that supports and rotates a magnetic disk; bearings disposed at both ends of a spindle shaft of the spindle rotation mechanism; and a housing base that supports the spindle rotation mechanism via the bearings. , a magnetic disk device comprising an earth pad provided on the housing base, a magnetic head for recording and reproducing information on the magnetic disk, and a carriage for holding and fixing the magnetic head; It is characterized by using a lubricant having electrical conductivity.
次に本発明の実施例について図面を参照して説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１図は、本発明の一実施例である磁気ディスク装置の
部分断面図、第２図は上記実施例を示すアースパッド近
傍の拡大断面図である。FIG. 1 is a partial sectional view of a magnetic disk drive according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the vicinity of a ground pad showing the embodiment.
第１図および第２図において本発明の磁気ディスク装置
は、ベースプレート１上にはモータ（図示せず）および
ヘッド・ディスク組立２（以下ＨＤＡと略す）が搭載さ
れて゛いる。このＨＤＡ２は、ハウジングベース（Ｕ）
３ 、ハウジングベース（Ｌ）４、スピンドル５．キ
ャリッジ６、磁気回路７゜÷シーム８により構成されて
いる。1 and 2, the magnetic disk drive of the present invention includes a motor (not shown) and a head/disk assembly 2 (hereinafter abbreviated as HDA) mounted on a base plate 1. As shown in FIGS. This HDA2 has a housing base (U)
3. Housing base (L) 4. Spindle 5. It is composed of a carriage 6, a magnetic circuit 7°÷seam 8.
スピンドル５は、シャフト１０．スピンドルハブ１１．
軸受１２および１３．スピンドルプーリ１４より構成さ
れ、スピンドルハブ１１には磁気ディスク９がスペーサ
リング１５を介して等間に積層され、クランプリング１
６に依りスピンドルハブ１１に固定されている。キャリ
ッジ６には磁気ヘッド２３が実装され、磁気回路７の磁
界とキャリッジ６に取り付けられているコイル１８に電
流を印加することに依り生じる磁界との反発作用により
、キャリッジ６は磁気ディスク９に対して半径方向に直
線往復運動を行い、磁気ヘッド２３を磁気ディスク９の
半径方向に直線往復運動させる。The spindle 5 has a shaft 10. Spindle hub 11.
Bearings 12 and 13. It is composed of a spindle pulley 14, and magnetic disks 9 are stacked on the spindle hub 11 at equal intervals via a spacer ring 15, and a clamp ring 1
6 is fixed to the spindle hub 11. A magnetic head 23 is mounted on the carriage 6, and the carriage 6 is moved against the magnetic disk 9 due to the repulsion between the magnetic field of the magnetic circuit 7 and the magnetic field generated by applying a current to the coil 18 attached to the carriage 6. This causes the magnetic head 23 to move linearly in the radial direction of the magnetic disk 9 .
一方、スピンドルハブ１１に固定される磁気ディスク９
は、ベースプレート１上に配置されたモータ（図示せず
）の回転をベルト２５およびスピンドルプーリ１４を介
してスピンドル５に伝達することにより回転させられる
。On the other hand, the magnetic disk 9 fixed to the spindle hub 11
is rotated by transmitting the rotation of a motor (not shown) disposed on the base plate 1 to the spindle 5 via the belt 25 and the spindle pulley 14.
モータによって駆動されて磁気ディスク９がスピンドル
５と共に回転しているとき、上位装置から位置決め指令
を受けるとキャリッジ６は、位置決め制御回路（図示せ
ず）に指示されてシーク動作を行い、指令所定位置にお
いて磁気ヘッド２３にて情報の記録或いは再生を行う。When the magnetic disk 9 is driven by the motor and rotates together with the spindle 5, when a positioning command is received from the host device, the carriage 6 performs a seek operation in response to an instruction from a positioning control circuit (not shown), and moves to the commanded predetermined position. In the magnetic head 23, information is recorded or reproduced.
本実施例ではハウジングベース（Ｕ）３とスピンドル５
との導通をとる為のアースパッド１７がハウジングベー
ス（Ｕ）３に取り付けらｈており、且つ、電気的導伝性
を有する潤滑剤１２ｄ、１３ｄを用いた軸受１２および
１３がスピンドル５のシャフト１０両端に配置されてい
る為、軸受１２および１３の内輪１２ａ、１３ａと外輪
１２ｃ。In this embodiment, the housing base (U) 3 and the spindle 5
A grounding pad 17 is attached to the housing base (U) 3 for establishing electrical continuity with the shaft of the spindle 5, and bearings 12 and 13 using electrically conductive lubricants 12d and 13d 10, so the inner rings 12a, 13a and outer rings 12c of the bearings 12 and 13.
１３ｃとの間に存在する玉１２ｂ、１３ｂと内外輪１２
ａ、１３ａおよび１２ｃ、１３ｃとの間に潤滑剤１２ｄ
、１３ｄの潤滑膜が形成された場合にも、内外輪は導通
が有り、従って、磁気ディスク９とハウジングベース（
Ｕ）３との間は常に導通性が有り、アースパッド１７を
介しての磁気ディスク９とハウジングベース（Ｕ）３間
との導通が瞬断現象などにより無くなった場合でも情報
の書込み・読出しにおける誤動作を起こすことがなくな
る。Balls 12b and 13b existing between the inner and outer rings 12 and 13c
lubricant 12d between a, 13a and 12c, 13c
, 13d, there is continuity between the inner and outer rings, and therefore the magnetic disk 9 and the housing base (
There is always continuity between the magnetic disk 9 and the housing base (U) 3 through the ground pad 17, and even if the continuity between the magnetic disk 9 and the housing base (U) 3 is lost due to a momentary interruption phenomenon, it is still possible to write and read information. No more malfunctions.
本発明は以上説明したように、電気的導伝性を有する潤
滑剤を用いた軸受を設けるという簡単な構成により、磁
気ディスクとハウジングベースとの導通を常時確保する
ことにより、情報の書込み・読出し時の誤動作を起こさ
ない信頼性の高い磁気ディスク装置が得られるという効
果がある。As explained above, the present invention has a simple configuration in which a bearing using an electrically conductive lubricant is provided, and by constantly ensuring continuity between the magnetic disk and the housing base, information can be written and read. This has the effect of providing a highly reliable magnetic disk device that does not cause malfunctions.
第１図は本発明の磁気ディスク装置の一実施例を示す部
分断面図、第２図は上記実施例を示すアースパッド近傍
の拡大断面図である。
３・・・・・・ハウジングベース（Ｕ）、５・・・・・
・スピンドル、９・・・・・・磁気ディスク、１２．１
３・・・・・・軸受、２３・・・・・・磁気ヘッド。
代理人 弁理士 内 原 晋
、−−
Ｎ〜℃） 幻FIG. 1 is a partial cross-sectional view showing one embodiment of a magnetic disk device of the present invention, and FIG. 2 is an enlarged cross-sectional view of the vicinity of a ground pad showing the above-mentioned embodiment. 3...Housing base (U), 5...
・Spindle, 9...Magnetic disk, 12.1
3...Bearing, 23...Magnetic head. Agent Patent Attorney Susumu Uchihara, -- N~℃) Illusion
Claims (1)
該スピンドル回転機構のスピンドル軸の両端に配置され
る軸受と、該軸受を介して前記スピンドル回転機構を支
持するハウジングベースと、該ハウジングベースに設け
られるアースパッドと前記磁気ディスクに対して情報の
記録・再生を行う磁気ヘッドと、該磁気ヘッドを保持固
定するキャリッジとを具備する磁気ディスク装置に於て
、前記軸受に電気的導伝性を有する潤滑剤を用いたこと
を特徴とする磁気ディスク装置。a spindle rotation mechanism that supports and rotates the magnetic disk;
Bearings disposed at both ends of the spindle shaft of the spindle rotation mechanism, a housing base that supports the spindle rotation mechanism via the bearings, an earth pad provided on the housing base, and information recording on the magnetic disk. - A magnetic disk device comprising a magnetic head for reproducing and a carriage for holding and fixing the magnetic head, characterized in that a lubricant having electrical conductivity is used in the bearing. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26560687A JPH01107366A (en) | 1987-10-20 | 1987-10-20 | Magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26560687A JPH01107366A (en) | 1987-10-20 | 1987-10-20 | Magnetic disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107366A true JPH01107366A (en) | 1989-04-25 |
Family
ID=17419469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26560687A Pending JPH01107366A (en) | 1987-10-20 | 1987-10-20 | Magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107366A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6594110B2 (en) | 2000-07-26 | 2003-07-15 | Nec Corporation | Removable disk drive |
-
1987
- 1987-10-20 JP JP26560687A patent/JPH01107366A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6594110B2 (en) | 2000-07-26 | 2003-07-15 | Nec Corporation | Removable disk drive |
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