JPH01179286A - Floating head mechanism - Google Patents
Floating head mechanismInfo
- Publication number
- JPH01179286A JPH01179286A JP33635387A JP33635387A JPH01179286A JP H01179286 A JPH01179286 A JP H01179286A JP 33635387 A JP33635387 A JP 33635387A JP 33635387 A JP33635387 A JP 33635387A JP H01179286 A JPH01179286 A JP H01179286A
- Authority
- JP
- Japan
- Prior art keywords
- spacer
- shape memory
- head
- hda
- memory alloy
- 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
- 230000007246 mechanism Effects 0.000 title claims description 11
- 125000006850 spacer group Chemical group 0.000 claims abstract description 26
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 15
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 5
- 230000006386 memory function Effects 0.000 abstract description 4
- 230000006870 function Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006903 response to temperature Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はヘッド・ディスクアセンブリ（以下ＨＤＡとい
う。）の温度変化によって発生するオフトラックを低減
する浮動ヘッド機構に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a floating head mechanism that reduces off-track caused by temperature changes in a head disk assembly (hereinafter referred to as HDA).
（従来技術及び発明が解決しようとする問題点）従来の
浮動ヘッド機構には、ＨＤＡの温度変化に対応して発生
するサーがヘッドとデータヘッドの位置ずれ、すなわち
、熱オフトラックを補正する機構は無かった。(Prior Art and Problems to be Solved by the Invention) The conventional floating head mechanism has a mechanism for correcting thermal off-track, which is the positional deviation between the head and the data head that occurs in response to temperature changes in the HDA. There was no.
熱オフトラックは、ＨＤＡの起動直後に記録した情報を
ＨＤＡが熱飽和した状態で再生しようとしても、ＨＤＡ
Ｏ熱分布の不平衡による構造体の変形や、構造体を構成
する部品の線膨張係数の違いなどで、位置ずれをおこし
て再生不能になる現象である。Thermal off-track means that even if you try to play back information recorded immediately after the HDA started up when the HDA is thermally saturated, the HDA
This is a phenomenon in which positional deviation occurs due to deformation of the structure due to unbalanced O heat distribution or differences in linear expansion coefficients of the parts that make up the structure, making it impossible to reproduce.
熱オフトラックはＨＤＡの設計に起因する固有の傾向が
あり、それぞれ機種のＨＤＡ対応で原因の究明と対策が
なされていた。具体的には、磁気ディスク回転系や磁気
へ７ドポジシ暫す系の構成材料の適正化や、機構構成・
形状などの変更によって、熱オフトラックの低減を図っ
ていた。しかし、これらの対策にも限界があシ、磁気デ
ィスク装置の高トラツク密度化の障害になっていた。Thermal off-track has a unique tendency due to the HDA design, and the cause has been investigated and countermeasures have been taken based on the HDA compatibility of each model. Specifically, we will optimize the constituent materials of the magnetic disk rotation system and the magnetic 7-position system, and improve the mechanical configuration and
The aim was to reduce thermal off-track by changing the shape and other aspects. However, these countermeasures had their limits, and were an obstacle to increasing the track density of magnetic disk drives.
近年、磁気ヘッドを支持するジンバル支持バネに、通称
ホイットニー形が用いられるようになったが、このホイ
ットニー形は、第２図に示すように、ある角度をもって
磁気ディスク媒体に対応している。図中の１は磁気ディ
スク、２は磁気ヘッド、３はジンバル支持バネ、４はヘ
ッドアーム、５はスペーサである。In recent years, gimbal support springs that support magnetic heads have come to be of the so-called Whitney shape, and as shown in FIG. 2, the Whitney shape corresponds to the magnetic disk medium at a certain angle. In the figure, 1 is a magnetic disk, 2 is a magnetic head, 3 is a gimbal support spring, 4 is a head arm, and 5 is a spacer.
浮動ヘラ・ド機構は、このような構成になっているなめ
に、ＨＤＡＯ熱変形や機構部品の熱変形量の違いなどで
、第３図に示すように、磁気ディスク回転系Ａと磁気ヘ
ッドポ・ゾシ冒す系Ｂとに、磁気ディスク回転系の回転
軸方向Ｙ 、 Ｙ’の位置ずれが生じると、上下の磁気
ヘッド２はお互いに異なった方向ｘ 、 ｘ’にずれて
しまい、記録・再生に悪影響を与え、高トラツク密度化
が図れないという欠点があった。As shown in Fig. 3, the floating head mechanism has such a structure because of the HDAO thermal deformation and the difference in the amount of thermal deformation of the mechanical parts. If a positional deviation occurs in the rotational axis directions Y and Y' of the magnetic disk rotation system in the system B, the upper and lower magnetic heads 2 will be shifted in different directions x and x', causing recording and reproducing problems. This has the disadvantage that it has an adverse effect on the track density and makes it impossible to achieve high track density.
（発明の目的）
本発明はＨＤＡの温度変化に対応して発生する熱オフト
ラックを抑圧するように構成した浮動ヘッド機構を提供
することを目的とする。(Object of the Invention) An object of the present invention is to provide a floating head mechanism configured to suppress thermal off-track that occurs in response to temperature changes in an HDA.
（問題点を解決するための手段）
本発明は上記目的を達成するために提案されたもので、
ホイットニー形のジンバル支持バネとヘッドパーとの間
に、形状記憶合金からなるスペーサを配設し、該形状記
憶合金の変態温度をＨＤＡ ＜２）温度変化と対応する
ような温度に設定し、さらに、形状を記憶する方向は形
状記憶合金からなるスペーサの厚みが変化する方向に設
定するようにしたものである。(Means for solving the problems) The present invention has been proposed to achieve the above objects, and
A spacer made of a shape memory alloy is disposed between the Whitney-shaped gimbal support spring and the head par, and the transformation temperature of the shape memory alloy is set to a temperature corresponding to HDA<2) temperature change, and further, The direction in which the shape is memorized is set in the direction in which the thickness of the spacer made of the shape memory alloy changes.
上記の形状記憶合金からなるスペーサの変態温度に対応
した変形方向は、伸縮いずれの方向でも活用することが
可能であり、第３図に示した上下のヘッドのいずれかの
スペーサに対応して用いることで、形状記憶合金からな
るスペーサ厚の約１０％程度の位置ずれまでは補正する
ことが可能であり、これは従来のステンレス材からなる
スペーサには無った機能である。The deformation direction corresponding to the transformation temperature of the spacer made of the above-mentioned shape memory alloy can be used in either direction of expansion or contraction, and can be used for either the spacer of the upper or lower head shown in Fig. 3. By doing so, it is possible to correct positional deviations up to about 10% of the thickness of the spacer made of a shape memory alloy, which is a function that conventional spacers made of stainless steel do not have.
以下、図面に沿って本発明の実施例について説明する。Embodiments of the present invention will be described below along with the drawings.
なお、実施例は一つの例示であって、本発明の精神を逸
脱しない範囲で種々の変更あるいは改良を行いうろこと
は言うまでもない。It should be noted that the embodiments are merely illustrative, and it goes without saying that various changes and improvements may be made without departing from the spirit of the present invention.
第１図は本発明の一実施例を示す図で、第３図の上側の
磁気ヘッドのスペーサに本発明の形状記憶合金からなる
ス被−サ５′ヲ用いた場合の実施例である。FIG. 1 shows an embodiment of the present invention, in which a spacer 5' made of the shape memory alloy of the present invention is used as the spacer of the upper magnetic head in FIG.
この場合の形状記憶合金からなるスペーサ５′は、ＨＤ
Ａの温度上昇に伴って板厚が厚くなるように変形する形
状記憶機能を与える。In this case, the spacer 5' made of shape memory alloy is HD
Provides a shape memory function that deforms so that the plate thickness increases as the temperature of A increases.
また、下側の磁気ヘッドのスペーサに本発明の形状記憶
合金からなるスペーサを用いる場合には、ＨＤＡの温度
上昇に伴って、スペーサの板厚が薄くなるように形状記
憶機能を与える。Further, when a spacer made of the shape memory alloy of the present invention is used as the spacer of the lower magnetic head, a shape memory function is provided so that the thickness of the spacer becomes thinner as the temperature of the HDA increases.
（発明の効果）
以上説明したように、本発明はジンバル支持バネとへラ
ドパーとの間のスペーサに、ＨＤＡ内の環境温度の変化
に対応して、板の厚みが変化するように記憶させた形状
記憶合金を用いたことによシその効果として、ＨＤＡの
温度変化によって、磁気ディスク回転系と磁気へッドポ
ゾシ１す系に、磁気ディスク回転系の回転軸方向の位置
ずれが発生しても、スペーサはこの位置ずれを補正する
ように機能し、前記の位置ずれに起因するオフトラック
を抑圧することができ、磁気ディスク装置の高トラツク
密度化が実現できる。(Effects of the Invention) As explained above, the present invention is configured such that the spacer between the gimbal support spring and the spatula is memorized so that the thickness of the plate changes in response to changes in the environmental temperature within the HDA. The effect of using a shape memory alloy is that even if a temperature change in the HDA causes a positional shift between the magnetic disk rotation system and the magnetic head position system in the direction of the rotation axis of the magnetic disk rotation system, The spacer functions to correct this positional deviation, suppressing off-track caused by the positional deviation, and realizing a high track density of the magnetic disk device.
第１図は本発明の一実施例を示す図で、第３図の位置ず
れを補正するように形状記憶合金からなるスペーサを配
設した浮動へノド機構を示す図、第２図は従来の磁気デ
ィスクと浮動ヘッド機構の関係を示す図、第３図は磁気
ディスク回転系と磁気ヘノドポジシ璽す系の位置ずれに
よるオフトラックの説明図である。
１・・・磁気ディスク、２・・・磁気ヘッド、３・・・
シンバル支持バネ、４・・・ヘッドパー、５・・・スペ
ーサ、５′・・・形状記憶合金からなるスペーサ。Fig. 1 shows an embodiment of the present invention, Fig. 3 shows a floating gutter mechanism in which a spacer made of a shape memory alloy is arranged to correct the positional deviation, and Fig. 2 shows a conventional gutter mechanism. FIG. 3 is a diagram showing the relationship between the magnetic disk and the floating head mechanism, and is an explanatory diagram of off-track caused by positional deviation between the magnetic disk rotation system and the magnetic head positioning system. 1...Magnetic disk, 2...Magnetic head, 3...
Cymbal support spring, 4... Head par, 5... Spacer, 5'... Spacer made of shape memory alloy.
Claims (1)
の磁気ヘッドと、該磁気ヘッドを支持するジンバル支持
バネとヘッドアームとで構成する浮動ヘッド機構におい
て、前記ジンバル支持バネとヘッドアームとの接合部に
形状記憶合金からなるスペーサを挾持したことを特徴と
する浮動ヘッド機構。In a floating head mechanism consisting of a floating magnetic head that performs recording and reproduction in correspondence with the surface of a magnetic disk medium, a gimbal support spring that supports the magnetic head, and a head arm, the gimbal support spring and the head arm A floating head mechanism characterized by a spacer made of a shape memory alloy held at the joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33635387A JPH01179286A (en) | 1987-12-28 | 1987-12-28 | Floating head mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33635387A JPH01179286A (en) | 1987-12-28 | 1987-12-28 | Floating head mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01179286A true JPH01179286A (en) | 1989-07-17 |
Family
ID=18298250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33635387A Pending JPH01179286A (en) | 1987-12-28 | 1987-12-28 | Floating head mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01179286A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5563522A (en) * | 1993-05-25 | 1996-10-08 | Mitsubishi Denki Kabushiki Kaisha | Microwave band probing apparatus |
| US9488162B2 (en) | 2011-03-29 | 2016-11-08 | Fujitsu Limited | Electronic device |
-
1987
- 1987-12-28 JP JP33635387A patent/JPH01179286A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5563522A (en) * | 1993-05-25 | 1996-10-08 | Mitsubishi Denki Kabushiki Kaisha | Microwave band probing apparatus |
| US9488162B2 (en) | 2011-03-29 | 2016-11-08 | Fujitsu Limited | Electronic device |
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