JPS63113919A - Floating head - Google Patents
Floating headInfo
- Publication number
- JPS63113919A JPS63113919A JP25857686A JP25857686A JPS63113919A JP S63113919 A JPS63113919 A JP S63113919A JP 25857686 A JP25857686 A JP 25857686A JP 25857686 A JP25857686 A JP 25857686A JP S63113919 A JPS63113919 A JP S63113919A
- Authority
- JP
- Japan
- Prior art keywords
- slider
- ski
- magnetic disk
- floating head
- center
- 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
- 239000000463 material Substances 0.000 claims description 21
- 239000000126 substance Substances 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 3
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006903 response to temperature Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5565—Track change, selection or acquisition by displacement of the head across disk tracks system adaptation for compensation of variations of physical parameters, e.g. temperature
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/60—Fluid-dynamic spacing of heads from record-carriers
- G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は浮動ヘッドに関し、磁気ディスク装置の熱オフ
トラックを低減し得るよう工夫したものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a floating head and is devised to reduce thermal off-track of a magnetic disk device.
〈従来の技術〉
第３図に示すように、磁気ディスク装置における磁気デ
ィスク１０は、同一回転軸１１上に軸方向に亘り等間隔
に多数枚が配設されている。この磁気ディスク１０に対
し情報の書き込み、読み出しを行なう磁気ヘッドは、浮
動ヘッド１２からなり各浮動ヘッド１２が各磁気ディス
ク１０に対応して多数へッドボジショナ１３に等間隔で
支持されている。また、この浮動ヘッド１２の目標トラ
ックへの位置決めは、ヘッドポジショナ１３と位置決め
回路とによって構成されろ閉ループサーボ系によって、
ヘッドポジショナ１３が磁気ディスク１０の径方向に関
し前後進し、多数の浮動ヘッド１２を一体的に移動せし
めることにより行なう。この際の浮動ヘッド１２の位置
検出は、サーボディスク１０ａと呼ぶ磁気ディスクに記
録した位置情報をサーボヘッド１２ａにより読み出すこ
とにより行なっている。<Prior Art> As shown in FIG. 3, a large number of magnetic disks 10 in a magnetic disk device are arranged on the same rotating shaft 11 at equal intervals in the axial direction. A magnetic head for writing and reading information to and from the magnetic disk 10 is composed of floating heads 12, and each floating head 12 is supported by a plurality of head positioners 13 at equal intervals in correspondence with each magnetic disk 10. Further, positioning of the floating head 12 to the target track is performed by a closed loop servo system consisting of a head positioner 13 and a positioning circuit.
This is done by moving the head positioner 13 back and forth in the radial direction of the magnetic disk 10 and moving a large number of floating heads 12 as one. At this time, the position of the floating head 12 is detected by using the servo head 12a to read position information recorded on a magnetic disk called a servo disk 10a.
第４図は従来技術に係る浮動ヘッド１２を示す斜視図で
ある。同図に示すように、電磁変換部２は、磁気ディス
クの移動方向（矢印Ａ）に対し直角な方向であるスライ
ダ１の幅方向（矢印Ｂ）に関する中央部に設けられたス
キー７の流出端部に固定されている。またスライダ１は
前記中央部を介して第３図に示すヘッドボレシ３す１３
に支持されている。FIG. 4 is a perspective view showing a floating head 12 according to the prior art. As shown in the figure, the electromagnetic transducer 2 is located at the outflow end of the ski 7 provided at the center in the width direction (arrow B) of the slider 1, which is a direction perpendicular to the moving direction (arrow A) of the magnetic disk. It is fixed to the part. Further, the slider 1 is connected to the head bolt 313 shown in FIG. 3 through the central portion.
is supported by
〈発明が解決しようとする問題点〉
ところで、磁気ディスク装置を駆動すると、／＼ラッド
ィスクアセンブリ （浮動ヘッド１２、その支持部及び
磁気ディスク回転部等が一体になったもの。以下ＨＤＡ
と略称する。）内は、ディスク回転系の風損や軸受損、
あるいは、スピンドルモータやボイスコイルモータから
の発熱等で温度が上昇する。また、環境温度の変化によ
ってもＨＤＡの温度は変わる。<Problems to be Solved by the Invention> By the way, when a magnetic disk device is driven, /\ rad disk assembly (a structure in which the floating head 12, its support part, magnetic disk rotating part, etc. are integrated; hereinafter referred to as HDA)
It is abbreviated as. ) is the windage loss and bearing loss of the disk rotation system,
Alternatively, the temperature may rise due to heat generation from the spindle motor or voice coil motor. Furthermore, the temperature of the HDA changes depending on changes in the environmental temperature.
このように、ＨＤＡの温度が変わると記録再生時に、Ｈ
ＤＡの構成部材の熱歪みによる熱オフトラック、すなわ
ち、浮動ヘッド１２と磁気ディスク１０の位置ずれが生
じ、安定な記録再生ができないという事態を生起する。In this way, when the HDA temperature changes, H
Thermal off-track, ie, misalignment between the floating head 12 and the magnetic disk 10, occurs due to thermal distortion of the components of the DA, resulting in a situation in which stable recording and reproduction cannot be performed.
更に評言すると、サーボヘッド１２ａのサーボディスク
１０ｎに対する位置に基づき決定した浮動ヘッドの位置
が、ＨＤＡの各部を構成する部材の材質の違いによる熱
膨張係数のバラツキ及び同一材質の部材であっても夫々
の部分の温度差による膨張量のバラツキ等により帰位し
てしまう。To further comment, the position of the floating head determined based on the position of the servo head 12a with respect to the servo disk 10n may vary due to variations in the coefficient of thermal expansion due to differences in the materials of the members constituting each part of the HDA, and even if the members are made of the same material. Due to variations in the amount of expansion caused by the temperature difference between the parts, it will return to its original position.
この熱オフトラックを低減するために、従来から三つの
方法がとられている。Three methods have been conventionally used to reduce this thermal off-track.
第一は、ＨＤＡＪｅファンなどで強制的に空冷して、Ｈ
ＤＡの温度上昇を抑えて、熱オフトラックを低減する方
法である。The first is to forcefully cool the H
This is a method of suppressing the temperature rise of the DA and reducing thermal off-track.
第二は、ＨＤＡ内の空気の温度を均一化す くるために
、エアースポイラを設置して、ＨＤＡ内の空気の流れを
最適化し、温度差による熱オフトランクを低減する方法
である。The second method is to install an air spoiler to equalize the temperature of the air inside the HDA, optimize the air flow inside the HDA, and reduce thermal off-trunk caused by temperature differences.
第三は、熱オフトラックに関係の深い構成部材の材料を
変えて、熱膨張量をコントロールする方法である。The third method is to control the amount of thermal expansion by changing the material of the components closely related to thermal off-track.
このような対処法で熱オフトラックの低減を図っている
が、これらの技術では、オフトラック量が明らかであっ
ても、そのオフトラック量に相当する値の補正を行うこ
とは困難であるばかりでなく、ＨＤＡ自体若しくはその
周辺部分の構成が複雑になり、また嵩も増大するという
欠点があった。Although these methods are used to reduce thermal off-track, even if the amount of off-track is clear, it is difficult to correct the value corresponding to the amount of off-track. However, the structure of the HDA itself or its surroundings becomes complicated, and its bulk increases.
本発明は、上記従来技術に鑑み、スライダ部にスライダ
材とは異なる熱膨張係数を持つ、異種物質を挿入するこ
とで、熱オフトラックの低減をはかり得ろ磁気ディスク
装置に用いる浮動ヘッドを提供することを目的とする。In view of the above-mentioned prior art, the present invention provides a floating head for use in a magnetic disk device in which thermal off-track can be reduced by inserting a different material having a coefficient of thermal expansion different from that of the slider material in the slider portion. The purpose is to
ぐ問題点を解決するための手段〉
上記目的を達成する本発明の構成は、磁気ディスク装置
の浮動ヘッドにおいて、磁気ディスクの移動方向に対し
直角な方向であるスライダの幅方向に関する中央部以外
の部分に設けられたスキーの流出端部に電磁変換部を固
定するとともに、前記中央部と前記スキーとの間に異種
物質を介在せしめたスライダを有すること、及び磁気デ
ィスクの移動方向に対し直角な方向であるスライダの幅
方向に関する中央部以外の部分に設けられたスキーの流
出端部に電磁変換部を固定するとともに、前記スキーに
沿いこのスキーの内側に隣接して流出側より溝が切り欠
かれ、更にこの溝内に異種物質を介在せしめたスライダ
を有することを特徴とする。Means for Solving the Problems> The configuration of the present invention that achieves the above object is such that, in a floating head of a magnetic disk device, a portion other than the central portion in the width direction of the slider, which is a direction perpendicular to the moving direction of the magnetic disk, An electromagnetic transducer is fixed to the outflow end of the ski provided in the part, and a slider having a different material interposed between the central part and the ski, and a slider that is perpendicular to the moving direction of the magnetic disk. An electromagnetic transducer is fixed to the outflow end of the ski provided in a part other than the center in the width direction of the slider, and a groove is cut out from the outflow side along the ski and adjacent to the inside of the ski. It is further characterized in that it has a slider in which a different material is interposed in the groove.
く作 用〉
上記構成の本発明によれば、ＨＤ Ａの温度に対応して
、スライダの中心から電磁変換部までの距離を、自動的
に変化させ、浮動ヘンドと磁気ディスクとの位置ずれを
補正する。According to the present invention having the above configuration, the distance from the center of the slider to the electromagnetic transducer is automatically changed in accordance with the temperature of the HD A, and the positional deviation between the floating hend and the magnetic disk is prevented. to correct.
即ち、サーボヘッドのサーボディスクに対する位置関係
に精確に追従して浮動ヘッドの磁気ディスクに対する位
置関係が決定される。That is, the positional relationship of the floating head with respect to the magnetic disk is determined by accurately following the positional relationship of the servo head with respect to the servo disk.
因に、第４図に示す従来技術に係る浮動ヘッド１２は、
スライダ１の幅方向の中央部と電磁変換部２とが同一直
線上にあるため、本発明のように異種物質の介在による
暢位旦の調整は行なうことができない。Incidentally, the floating head 12 according to the prior art shown in FIG.
Since the center portion of the slider 1 in the width direction and the electromagnetic transducer 2 are on the same straight line, it is impossible to adjust the alignment by intervening a different material as in the present invention.
く実 施 例〉 以下本発明の実施例を図面に基づき詳細に説明する。Example of implementation Embodiments of the present invention will be described in detail below based on the drawings.
第１図は本発明の第１の実施例を示す斜視図であり、第
４図と同一部分には同一番号を付している。FIG. 1 is a perspective view showing a first embodiment of the present invention, and the same parts as in FIG. 4 are given the same numbers.
同図に示すように、本実施例に係る浮動ヘッド１２は、
スライダ１の幅方向の中央部と流出端部に電磁変換部２
が固定されたスキー３との間に、異種物質５が挿入され
るように構成する。As shown in the figure, the floating head 12 according to this embodiment is
Electromagnetic converter 2 is located at the center and outflow end of the slider 1 in the width direction.
The foreign material 5 is inserted between the ski 3 and the ski 3 to which the ski 3 is fixed.
このために、異種物質５の選択にあたって、異種物質５
の熱膨張係数をスライダ１の熱膨張係数よりも大きく選
ぶと、ＨＤＡの温度上昇でスライダの温度が上がると、
スライダ１の幅方向の中央部と電磁変換部２との距離は
、スライダ材だけの場合より大きくなる。また、異種物
質５の熱膨張係数をスライダ１の熱膨張係数よりも小さ
く選ぶと、上記と逆の結果が得られる。For this reason, when selecting the foreign substance 5,
If the thermal expansion coefficient of is selected to be larger than that of slider 1, when the temperature of the slider rises due to the temperature rise of HDA,
The distance between the center portion of the slider 1 in the width direction and the electromagnetic transducer 2 is larger than that in the case of only the slider material. Furthermore, if the coefficient of thermal expansion of the different material 5 is selected to be smaller than the coefficient of thermal expansion of the slider 1, the opposite result to the above will be obtained.
具体的には、スライダ材として用いられている アルミ
ナチタンカーバイトの線膨張係数は、？、８５ Ｘ １
０であるために、異種物質５に高分子材を用いると、線
膨張係数は、５５〜１８０Ｘ１０、また、石英ガラスな
どを用いると０．５Ｘ１０ など、上記の機能を満たす
ような異種物質の選択が可能である。Specifically, what is the linear expansion coefficient of alumina titanium carbide used as the slider material? , 85 x 1
Therefore, if a polymer material is used as the foreign material 5, the linear expansion coefficient will be 55 to 180X10, and if quartz glass or the like is used, the coefficient of linear expansion will be 0.5X10, etc. Select a foreign material that satisfies the above function. is possible.
したがって、予めＨＤＡの温度−膨張量特性を測定して
おき、ＨＤＡの周囲温度が変化してもサーボヘッドのサ
ーボディスクに対する位置関係に追従し得るような材質
の異種物質を選定すれば良い。Therefore, it is sufficient to measure the temperature-expansion characteristics of the HDA in advance and select a different type of material that can follow the positional relationship of the servo head with respect to the servo disk even if the ambient temperature of the HDA changes.
第２図は本発明の第２の実施例を示す斜視図であり、第
１図及び第４図と同一部分は同一番号を付している。FIG. 2 is a perspective view showing a second embodiment of the present invention, and the same parts as in FIGS. 1 and 4 are given the same numbers.
同図に示すように、本実施例に係る浮動へ ・ラド１２
は、スライダ１の電磁変換部２が固定されているスキー
３に隣接して、流出端側よりＦＩ４６を加工し、この溝
６には異種物質５を挿入して固定するように構成する。As shown in the figure, to the floating according to this embodiment - Rad 12
The structure is such that an FI 46 is machined from the outflow end side adjacent to the ski 3 to which the electromagnetic transducer 2 of the slider 1 is fixed, and a foreign material 5 is inserted into this groove 6 and fixed therein.
このため、異種物質５の選択により、第１図の構成と同
等の効果がえられる。すなわち、ＨＤＡの温度変化に対
応して異種物質５は電磁変換部２が固定されているスキ
ー３を外側または内側に変形させ、スライダ１の幅方向
の中央部と電磁変換部２との距離に変化を与えることが
可能である。Therefore, by selecting the different material 5, the same effect as the configuration shown in FIG. 1 can be obtained. That is, in response to temperature changes in the HDA, the foreign substance 5 deforms the ski 3 to which the electromagnetic transducer 2 is fixed outward or inward, causing the distance between the widthwise center of the slider 1 and the electromagnetic transducer 2 to change. It is possible to make changes.
〈発明の効果〉
以上説明したように、本発明によると、異種物質を適当
に選択することによって、内周側や外周側の両方向への
熱オフトラックに対応でき、また、任意のオフトラック
量を設定することもできるので、磁気ディスク装置の高
記録密度化が容易に達成できると言う利点がある。<Effects of the Invention> As explained above, according to the present invention, by appropriately selecting different materials, it is possible to cope with thermal off-track in both directions toward the inner circumferential side and the outer circumferential side. can also be set, which has the advantage of easily increasing the recording density of the magnetic disk device.
第１図は本発明の第１の実施例を示す斜視図、第２図は
本発明の第２の実施例を示す斜視図、第３図は磁気ディ
スク装置を特にヘッドの位置決め機構を中心に示すブロ
ック図、第４図は従来技術を示す斜視図である。
図 面 中、
１はスライダ、
２は電磁変換部、
３．４ばスキー、
５は異種物質、
６は溝、
１２は浮動ヘッド、
Ａは磁気ディスクの移動方向、
Ｂは幅方向である。
第１図
第２図
第４図
へへへ５Fig. 1 is a perspective view showing a first embodiment of the present invention, Fig. 2 is a perspective view showing a second embodiment of the invention, and Fig. 3 shows a magnetic disk device, particularly focusing on a head positioning mechanism. The block diagram shown in FIG. 4 is a perspective view showing the prior art. In the drawing, 1 is a slider, 2 is an electromagnetic transducer, 3.4 is a ski, 5 is a foreign material, 6 is a groove, 12 is a floating head, A is a moving direction of the magnetic disk, and B is a width direction. Figure 1 Figure 2 Figure 4 Hehehe 5
Claims (2)
ィスクの移動方向に対し直角な方向であるスライダの幅
方向に関する中央部以外の部分に設けられたスキーの流
出端部に電磁変換部を固定するとともに、前記中央部と
前記スキーとの間に異種物質を介在せしめたスライダを
有することを特徴とする浮動ヘッド。(1) In a floating head of a magnetic disk device, an electromagnetic transducer is fixed to the outflow end of a ski provided in a portion other than the center in the width direction of the slider, which is a direction perpendicular to the direction of movement of the magnetic disk. . A floating head comprising a slider having a different material interposed between the center portion and the ski.
ィスクの移動方向に対し直角な方向であるスライダの幅
方向に関する中央部以外の部分に設けられたスキーの流
出端部に電磁変換部を固定するとともに、前記スキーに
沿いこのスキーの内側に隣接して流出側より溝が切り欠
かれ、更にこの溝内に異種物質を介在せしめたスライダ
を有することを特徴とする浮動ヘッド。(2) In a floating head of a magnetic disk device, an electromagnetic transducer is fixed to the outflow end of a ski provided in a portion other than the central portion in the width direction of the slider, which is a direction perpendicular to the direction of movement of the magnetic disk. . A floating head comprising a slider having a groove cut out from the outflow side along the ski and adjacent to the inside of the ski, and further having a foreign material interposed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25857686A JPS63113919A (en) | 1986-10-31 | 1986-10-31 | Floating head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25857686A JPS63113919A (en) | 1986-10-31 | 1986-10-31 | Floating head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63113919A true JPS63113919A (en) | 1988-05-18 |
Family
ID=17322167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25857686A Pending JPS63113919A (en) | 1986-10-31 | 1986-10-31 | Floating head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63113919A (en) |
-
1986
- 1986-10-31 JP JP25857686A patent/JPS63113919A/en active Pending
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