JPH02128381A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce the wear of a magnetic head slider and recording medium due to the contact between them at the time of actuation and stoppage by providing a system which detects the position of the floating head slider in the track direction at the time of landing on and off and another system which detects the number of landing on and off operations. CONSTITUTION:The operating number of a landing on/off mechanism 3 is monitored by means of a number of times detecting system 8 which counts the operating number of the mechanism 3 and the landing position P of a floating head slider 1 is changed within the extent of tracks 1-n in the landing zone L on the surface of a recording medium 2 outside the data zone. The landing position P is detected by means of a position detecting system 9 which is fitted to a head positioning mechanism 7 and detects the stopping position of the front wheel 7a of the mechanism 7 corresponding to the landing position P. Since the landing on/off operations are performed at several track positions on the surface of the recording medium in such way, the damage of a magnetic head and the surface of the recording medium 2 caused by the contact between them at the time of actuation and stoppage can be reduced.

Description

【発明の詳細な説明】 （１）発明の目的 ［産業上の利用分野１ 本発明は、高密度の磁気記録を行う磁気ディスク装賀に
係わり、特に装置の起動・停止時におけるヘッドと磁気
記録媒体の接触による信頼性の低下を防止出来るように
した磁気ディスク装置に関する。Detailed Description of the Invention (1) Purpose of the Invention [Industrial Application Field 1] The present invention relates to a magnetic disk mounting system for performing high-density magnetic recording, and particularly relates to the mounting of a magnetic disk that performs high-density magnetic recording. The present invention relates to a magnetic disk device that can prevent a decrease in reliability due to contact between media.

［従来の技術］ コンピュータの外部記憶装置として用いられている磁気
ディスク装置には、旋回する記録媒体表面の粘性空気流
の初圧効果を利用して、電磁変換部を記録媒体上に浮動
させる浮動ヘッドスライダが用いられている。記録媒体
と電磁変換部は非接触に保たれるため、高速動作と高信
頼性を兼ね備えた磁気ディスク装置が実現されている。[Prior Art] A magnetic disk drive used as an external storage device for a computer uses a floating system that uses the initial pressure effect of a viscous air flow on the surface of a rotating recording medium to float an electromagnetic transducer above the recording medium. A head slider is used. Since the recording medium and the electromagnetic transducer are kept in non-contact, a magnetic disk device that has both high-speed operation and high reliability has been realized.

しかし、装置の起動・停止時には浮動ヘッドスライダに
は十分な動圧（浮上刃）が発生しないため、電磁変換部
と記録媒体の間の接触が起こる。However, since sufficient dynamic pressure (floating blade) is not generated in the floating head slider when the apparatus is started or stopped, contact occurs between the electromagnetic transducer and the recording medium.

第２図に従来のＣ，Ｓ、Ｓ、方式（ＣｏｎｔａｃｔＳｔ
ａｒｔ　＆　５ｔｏｐ）　！！気ディスク装置の起動・
停止時における浮動ヘッドスライダの浮上状態を示す。Figure 2 shows the conventional C, S, S method (ContactSt
art & 5top)! ! Starting the disk device
The floating state of the floating head slider when stopped is shown.

同図中１は浮動ヘッドスライダ、ＦＳは支持機構による
押し付は荷重、Ｆｈはスライダに働く浮上刃であり、第
２図（ａ）は浮動ヘッドスライダ１の起動・停止時を示
し、記録媒体面２走行速度Ｕが小さい時には、Ｆｈ＜Ｆ
ｓであるために浮動ヘッドスライダ１は記録媒体と第２
図（ｂ）のように接触走行し、第２図（Ｃ）は記録媒体
面２走行速麿（）が大きい時のＦｈ＞ＦＳ条件下での浮
上走行を示す。この６式の磁気ディスク装置においては
、浮動ヘッドスライダ１の摺動に耐える機械的強度の高
い記録媒体面２の使用が必須である。しかし、近年実用
に供されつつある連続薄膜記録媒体面２は、従来の塗布
記録媒体面と比較すると記録媒体面２の強１立が極端に
低く、起動停止時の記録媒体面２の摩耗・損傷が著しい
。また記録媒体面２の平坦度が良いために、停止時ある
いは低速摺動時には浮動ヘッドスライダ１と記録媒体面
２が吸着を起こし、記録媒体面２の走行方向への引張り
力により支持機構が破損したり、記録媒体面２の摩耗損
傷が増加する可能性がある。In the figure, 1 is the floating head slider, FS is the load pushed by the support mechanism, and Fh is the floating blade acting on the slider. Figure 2 (a) shows the floating head slider 1 when it starts and stops, and the recording medium When surface 2 traveling speed U is small, Fh<F
s, the floating head slider 1 is connected to the recording medium and the second
The contact running is performed as shown in FIG. 2(b), and FIG. 2(C) shows the floating running under the condition of Fh>FS when the recording medium surface 2 running speed () is large. In these six types of magnetic disk drives, it is essential to use a recording medium surface 2 that has high mechanical strength to withstand the sliding movement of the floating head slider 1. However, in the continuous thin film recording medium surface 2 that has been put into practical use in recent years, the strength of the recording medium surface 2 is extremely low compared to the conventional coated recording medium surface, and the wear and tear of the recording medium surface 2 during startup and stop. Significant damage. In addition, since the flatness of the recording medium surface 2 is good, the floating head slider 1 and the recording medium surface 2 will stick together when stopped or sliding at low speed, and the support mechanism will be damaged due to the tensile force of the recording medium surface 2 in the running direction. Otherwise, wear damage on the recording medium surface 2 may increase.

これらを回避するためには、ディスク停止時には浮動ヘ
ッドスライダ１を記録媒体面２から遠ざけて非接触に保
ち、ディスク起動時には記録媒体面２が回転した状態で
浮動ヘッドスライダ１を記録媒体面２上に静かに着地す
るランデインタオン・オフ機構の採用が有効である。In order to avoid these problems, when the disk is stopped, the floating head slider 1 is kept away from the recording medium surface 2 to keep it out of contact, and when the disk is started, the floating head slider 1 is moved above the recording medium surface 2 while the recording medium surface 2 is rotating. It is effective to employ a landing on/off mechanism that allows the vehicle to land quietly.

第３図に磁気ディスク装置Ａにおけるランデインタオン
・オフ機構の一例を示す。搦円カム状のランデインタオ
ン・オフ機構３を１／４回転することにより、浮動ヘッ
ドスライダ１を磁気記録媒体４の記録媒体面２に着地ま
たは分ｍ動作させる。ここで、５はジンバルバネ、６は
スライダ支持機構、７はヘッド位置決め機構を表す。し
かし、この方式においては、浮動ヘッドスライダ１の僅
かな傾きにより、ランデインタオン・オフ時に浮動ヘッ
ドスライダ１のエツジ部と高速回転する記録媒体面２上
のランアウトや微小なうねりが接触し、記録媒体面２お
よび磁気ヘッドスライダ１の摩耗を促進するという問題
があった。FIG. 3 shows an example of a turn-on/off mechanism in the magnetic disk device A. The floating head slider 1 lands on the recording medium surface 2 of the magnetic recording medium 4 or is moved by a minute m by rotating the circular cam-shaped land-interon/off mechanism 3 by 1/4 rotation. Here, 5 represents a gimbal spring, 6 represents a slider support mechanism, and 7 represents a head positioning mechanism. However, in this method, due to the slight inclination of the floating head slider 1, the edge portion of the floating head slider 1 comes into contact with the run-out or minute waviness on the recording medium surface 2 rotating at high speed during the run-in turn on/off, resulting in the recording There is a problem in that the wear of the medium surface 2 and the magnetic head slider 1 is accelerated.

（２）発明の構成 ［充用が解決しようとする課題］ 本発明は、このような事情に鑑みてなされたものであり
、磁気ディスク装置の起動・停止時における磁気ヘッド
スライダと記録媒体面の接触によるＩ↑擦・摩耗を低減
し、信頼性を向上させた磁気ディスク装置を提供せんと
することにある。(2) Structure of the invention [Problems to be solved by application] The present invention was made in view of the above circumstances, and it solves the problem of contact between the magnetic head slider and the recording medium surface when starting and stopping a magnetic disk device. The object of the present invention is to provide a magnetic disk device that reduces friction and wear due to I↑ and improves reliability.

［実　施　例］ 以下、本発明の実施例を第１図に基づいて説明する。[Example] Embodiments of the present invention will be described below with reference to FIG.

同図中１は浮動ヘッドスライダ、２は記録媒体面、３は
ランデインタオン・オフ機構、４は磁気記録媒体、５は
ジンバルバネ、６はスライダ支持ｍ構、７はヘッド位置
決め機構、８は回数検出系、９は位置検出系である。In the figure, 1 is a floating head slider, 2 is a recording medium surface, 3 is a landing gear on/off mechanism, 4 is a magnetic recording medium, 5 is a gimbal spring, 6 is a slider support mechanism, 7 is a head positioning mechanism, and 8 is a number of times Detection system 9 is a position detection system.

［作　　　用］ 本発明は前記のように構成するから、ランデインタオン
・オフ機構３の動作回数を計数する回数検出系８により
モニタし、動作回数に応じて浮動ヘッドスライダ１のラ
ンディング位置Ｐを記録媒体面２のデータゾーンＤ外側
のランディングゾーンＬ自トラツク■〜■の範囲で変え
る。ランディング位ｔｆｉＰの検出は、ヘッド位置決め
機構７に取り付けた位置検出系９によりランディング位
ＶＩＰに対応するヘッド位置決め機構７の前輪７ａの停
止位置を検出して行う。ｎ箇所のそれぞれ決められた範
囲のトラック内でランデインタオン・オフを精確に行う
ことにより、起動停止時における本発明の磁気ディスク
装［Ｂの信頼性を従来のｎ倍に向上させることができる
。[Function] Since the present invention is constructed as described above, the number of operations of the landing gear on/off mechanism 3 is monitored by the number detection system 8 that counts the number of operations, and the landing position P of the floating head slider 1 is determined according to the number of operations. The landing zone L outside the data zone D on the recording medium surface 2 can be changed within the range of ■ to ■. The landing position tfiP is detected by the position detection system 9 attached to the head positioning mechanism 7 detecting the stop position of the front wheel 7a of the head positioning mechanism 7 corresponding to the landing position VIP. By accurately performing turn-on and turn-off within tracks within a predetermined range at n locations, the reliability of the magnetic disk drive of the present invention during startup and stop can be improved by n times compared to the conventional one. .

（３）発明の効果 かくして、本発明に係わる磁気ディスク装置は、記録媒
体面の数カ所のトラック位置においてランデインタオン
・オフ動作を行わせるため、磁気ディスク装置の起動停
止時に磁気ヘッドと記録媒体面の接触により受けるダメ
ージを低減し、装置の信頼性を向上させる等優れた効果
を奏する。(3) Effects of the Invention In this way, the magnetic disk device according to the present invention performs land-interon/off operations at several track positions on the recording medium surface, so that when the magnetic disk device starts and stops, the magnetic head and the recording medium surface It has excellent effects such as reducing damage caused by contact with other parts and improving reliability of the device.

【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概念図、第２図は従来の
Ｃ，Ｓ、Ｓ、方式の磁気ヘッド動作原理図、第３図は従
来のランデインタオン・オフ方式の磁気ヘッド動作原理
図である。 Ａ、Ｂ・・・磁気ディスク装置 １・・・浮動ヘッドスライダ ２・・・記録媒体面 ３・・・ランデインタオン・オフ機構 ４・・・磁気記録媒体　　　５・・・ジンバルバネ６・
・・スライダ支持ｍ構 ７・・・ヘッド位置決め機構 ８・・・回数検出系　　　　９・・・位置検出系Ｆｓ・
・・押し付は荷重　　Ｆｈ・・・浮上刃Ｕ・・・媒体面
走行速度Fig. 1 is a conceptual diagram showing an embodiment of the present invention, Fig. 2 is a diagram of the operation principle of a conventional C, S, S type magnetic head, and Fig. 3 is an operation principle of a conventional land-interon-off type magnetic head. It is a principle diagram. A, B...Magnetic disk device 1...Floating head slider 2...Recording medium surface 3...Landing turn on/off mechanism 4...Magnetic recording medium 5...Gimbal spring 6...
...Slider support m structure 7...Head positioning mechanism 8...Number of times detection system 9...Position detection system Fs...
...Pushing is load Fh...Floating blade U...Media surface running speed

Claims (1)

【特許請求の範囲】[Claims] １、回転する磁気記録媒体上に微小な隙間を介して該磁
気記録媒体面上の所望のトラック位置に位置決めされて
情報の記録・再生を行う浮動ヘッドスライダと、該磁気
記録媒体の起動・停止時に該浮動ヘッドスライダを該磁
気記録媒体面に対して押圧または分離するためのランデ
インタオン・オフ機構とを搭載してなる磁気ディスク装
置において、ランデインタオン・オフ時における該浮動
ヘッドスライダのトラック方向の位置検出系と、ランデ
インタオン・オフ動作の回数検出系とを具備することを
特徴とする磁気ディスク装置1. A floating head slider that is positioned on a rotating magnetic recording medium through a minute gap at a desired track position on the surface of the magnetic recording medium to record and reproduce information, and starting and stopping the magnetic recording medium. In a magnetic disk drive equipped with a land-inter on/off mechanism for pressing or separating the floating head slider from the surface of the magnetic recording medium, the track of the floating head slider at the time of land-inter on/off. A magnetic disk device comprising: a direction position detection system; and a run-interon/off operation frequency detection system.