JPS6332793A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPS6332793A JPS6332793A JP17604586A JP17604586A JPS6332793A JP S6332793 A JPS6332793 A JP S6332793A JP 17604586 A JP17604586 A JP 17604586A JP 17604586 A JP17604586 A JP 17604586A JP S6332793 A JPS6332793 A JP S6332793A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- head
- magnetic disk
- linear expansion
- temperature
- 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
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 abstract description 6
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 abstract description 5
- 239000000758 substrate Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
Landscapes
- Supporting Of Heads In Record-Carrier Devices (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、特に各々アルミ合金
材を用いた磁気ディスクと磁気ヘッドのヘッドアームと
で構成されるトラックフォローイング型式の磁気ディス
ク装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic disk device, and particularly to a track following type magnetic disk consisting of a magnetic disk and a head arm of a magnetic head, each of which is made of an aluminum alloy material. Regarding equipment.
従来、この種の磁気ディスク装置は、磁気ディスクは高
純度アルミ合金(具体的にはA3086)材で製造し、
磁気ヘッドのヘッドアームは、鋳造用アルミ合金材で構
成されていた。Conventionally, in this type of magnetic disk device, the magnetic disk is manufactured from a high-purity aluminum alloy (specifically A3086) material.
The head arm of the magnetic head was made of cast aluminum alloy material.
上述した従来の磁気ディスク装置は、磁気ディスクの材
料の線膨張係数はバラツキが比較的小さいのに対し、磁
気ヘッドの線膨張係数は、鋳造方法或いはアルミニウム
純度の違いによりバラツキが大きく、磁気ディスクと磁
気ヘッドとの線膨張係数の差のバラツキが大きい為、情
報の記録時と再生時とで温度差がある場合、磁気ディス
クと磁気ヘッドとの半径方向の相対位置関係がずれ、所
謂、サーマルオフトラック現象を起こし、情報の書込み
、読出しに誤動作を発生するという欠点がある。In the conventional magnetic disk drive described above, the variation in the coefficient of linear expansion of the material of the magnetic disk is relatively small, but the coefficient of linear expansion of the magnetic head varies widely due to differences in casting method or aluminum purity. Because there is a large variation in the difference in linear expansion coefficient between the magnetic head and the magnetic head, if there is a temperature difference between recording and reproducing information, the relative positional relationship in the radial direction between the magnetic disk and the magnetic head will shift, resulting in so-called thermal off. This method has the drawback of causing a tracking phenomenon and causing malfunctions in writing and reading information.
C問題点を解決するだめの手段〕
本発明は、上記従来の問題点に着目してなされたもので
、情報の記録時と再生時とで温度差が有る場合に生じる
磁気ディスクと磁気ヘッドとの半径方向の相対的位置ず
れを極小とし、情報の書込み、読出しにおける誤動作を
少くすることのできる磁気ディスク装置を提供せんとす
るものである。[Means for Solving Problem C] The present invention has been made by focusing on the above-mentioned conventional problem, and it solves the problem of the magnetic disk and magnetic head that occurs when there is a temperature difference between recording and reproducing information. It is an object of the present invention to provide a magnetic disk device that can minimize the relative positional deviation in the radial direction of the magnetic disk and reduce malfunctions in writing and reading information.
その為に本発明は、磁気ディスク群と前記磁気ディスク
群を積層するスペーサリングと、前記磁気ディスク群を
支持回転させるスピンドルト、前記磁気ディスク群を前
記スピンドルに固定するクランプリングと、情報記録再
生用の複数の磁気ヘッドと、前記磁気ヘッドを保持し位
置決めを行うキャリッジとを具備する磁気ディスク装置
において、前記磁気ディスク群と前記磁気ヘッドのヘッ
ドアームとの線膨張係数の差が僅少、且つ、正負関係が
一定となるアルミ合金材料で各々を形成したことを特徴
とする。To this end, the present invention provides a magnetic disk group, a spacer ring for stacking the magnetic disk group, a spindle for supporting and rotating the magnetic disk group, a clamp ring for fixing the magnetic disk group to the spindle, and information recording/reproducing. In a magnetic disk device comprising a plurality of magnetic heads for use in a vehicle and a carriage for holding and positioning the magnetic heads, the difference in coefficient of linear expansion between the magnetic disk group and the head arm of the magnetic head is small, and They are each made of an aluminum alloy material that has a constant positive/negative relationship.
次に、本発明の一実施例について図面を参照して説明す
る。Next, an embodiment of the present invention will be described with reference to the drawings.
図面において、スピンドル1は磁気ディスク2をスペー
サリング10を介して等間隔に積層搭載し、クランブリ
ング6により磁気ディスク2を固定し、下基板3.−上
基板4に各々軸受(図示せず)を介して回転自在に取付
けられており、専用のモータ(図示せず)によって駆動
される。In the drawing, a spindle 1 has magnetic disks 2 stacked at regular intervals through a spacer ring 10, the magnetic disks 2 are fixed by a clamping ring 6, and a lower substrate 3. - They are rotatably attached to the upper substrate 4 via bearings (not shown), and are driven by dedicated motors (not shown).
この磁気ディスク2に対して、データ信号の書込み・読
出しを行う磁気ヘッド5(リードライトヘッド)および
位置決め信号(サーボ信号)を記録しであるサーボディ
スク2aからサーボ信号を読出すだめのサーボヘッド5
aとを搭載するキャリッジ7は、磁気ディスク2の中心
方向に向かって直線的に往復運動を行う。このキャリッ
ジ7の往復運動を駆動するため、永久磁石によって構成
されろ磁気回路8が設けられており、磁気回路8はフレ
ーム9を介して、上基板4および下基板3に取付けられ
、キャリッジ7に設けられているコイル(図示せず)と
共働してキャリッジ7の往復運動を行う。A magnetic head 5 (read/write head) writes and reads data signals to and from the magnetic disk 2, and a servo head 5 records positioning signals (servo signals) and reads servo signals from the servo disk 2a.
The carriage 7 carrying the magnetic disk a performs linear reciprocating motion toward the center of the magnetic disk 2. In order to drive the reciprocating motion of the carriage 7, a magnetic circuit 8 made of permanent magnets is provided.The magnetic circuit 8 is attached to the upper substrate 4 and the lower substrate 3 via a frame 9, and The reciprocating motion of the carriage 7 is performed in cooperation with a provided coil (not shown).
これらの磁気ディスク2.キャリッジ7、磁気へノド5
は基板板4.下基板3.フレーム9およびカバ(図示せ
ず)とによって覆われ、密封ケース内に収容されている
。These magnetic disks2. Carriage 7, magnetic throat 5
is the substrate plate 4. Lower board 3. It is covered by a frame 9 and a cover (not shown) and housed in a sealed case.
上述のような構成された磁気ディスク装置は次のように
動作する。モータによって駆動されて磁気ディスク2が
スピンドル1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7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5にて情報の記録或いは再生
を行う。The magnetic disk device configured as described above operates as follows. When the magnetic disk 2 is driven by the motor and rotates together with the spindle 1, when a positioning command is received from the host device, the carriage 7 is instructed by a positioning control circuit (not shown) to perform a seek operation and move to the commanded predetermined position. At this point, information is recorded or reproduced using the magnetic head 5.
従って、情報の記録時と再生時とで密封ケース内の温度
は、磁気ディスク装置の使用環境温度差、およびモータ
によってスピンドル1が駆動された時間の相違による温
度差により大きく異なっている場合がある。Therefore, the temperature inside the sealed case when recording and reproducing information may vary greatly due to temperature differences in the operating environment of the magnetic disk device and temperature differences due to differences in the time during which the spindle 1 is driven by the motor. .
本実施例では、サーボヘッド5aの板間温度に比して、
データヘッドの板間温度の方が低くなる為、情報の記録
時、再生時における上記板間温度差と密封ケース内の温
度差の両者を考慮した場合に生じるサーマルオフトラッ
クが理論上最小となるべく、磁気ディスク2の線膨張係
数に比して磁気ヘッド5のヘッドアーム11の線膨張係
数が僅かに大きいアルミ合金材料で形成しておシ(具体
的には、磁気ディスクの線膨張係数をαd、ヘッドアー
ムの線膨張係数をαaとすると、0.3 X 10−’
/’C−<αa−αd 40.9 X 10”’/’C
)、且つ、αa−αd)Qの材料としている為、情報の
記録・再生時とで密封ケース内の温度が大きく異なって
いる場合にも、サーマルオフトラック量が小さく、情報
の書込み・読出しにおける誤動作が少くなる。In this embodiment, compared to the interplate temperature of the servo head 5a,
Since the temperature between the plates of the data head is lower, the thermal off-track that occurs when considering both the temperature difference between the plates and the temperature difference inside the sealed case when recording and reproducing information can be theoretically minimized. The head arm 11 of the magnetic head 5 is made of an aluminum alloy material whose linear expansion coefficient is slightly larger than that of the magnetic disk 2 (specifically, the linear expansion coefficient of the magnetic disk is αd). , if the linear expansion coefficient of the head arm is αa, then 0.3 X 10-'
/'C-<αa-αd 40.9 X 10"'/'C
), and αa-αd)Q material, the amount of thermal off-track is small even when the temperature inside the sealed case differs greatly between recording and reproducing information, making it easy to read and write information. Malfunctions are reduced.
なお、本実施例では、αa−αd)Qとしているが、磁
気ディスク装置の構成によっては、αd−αa〉0とな
る場合もあり、この場合も本発明と同等の効果があシ、
本発明に含まれることはいうまでもない。In this embodiment, αa-αd)Q is used, but depending on the configuration of the magnetic disk device, αd-αa>0 may be obtained, and in this case, the same effect as the present invention is obtained.
It goes without saying that it is included in the present invention.
以上説明したように本発明は、磁気ディスクと磁気ヘッ
ドのヘッドアームとの線膨張係数の差を僅少、且つ正負
関係が一定となるアルミ合金材料で各々を形成すること
により、情報の記録・再生時とで温度差が犬亡ぐ異なる
場合にもサーマルオフトラック量が小さく、その結果情
報の宵込み。As explained above, the present invention enables recording and reproduction of information by forming the magnetic disk and the head arm of the magnetic head from an aluminum alloy material that has a slight difference in coefficient of linear expansion and has a constant positive/negative relationship. Even if the temperature difference differs from time to time, the amount of thermal off-track is small, resulting in a loss of information.
読出しにおける誤動作を少くすることができるという効
果がある。This has the effect of reducing malfunctions during reading.
図面は本発明の一実施例の磁気ディスク装置を示す断面
図である。
1・・・・・・スピンドル、2・・・・・・磁気ディス
ク、5・・・・・・磁気−・4ツド、7・・・・・・・
キャリッジ、11・・・・・・ヘッドアーム。The drawing is a sectional view showing a magnetic disk device according to an embodiment of the present invention. 1...Spindle, 2...Magnetic disk, 5...Magnetic disk, 7......
Carriage, 11...Head arm.
Claims (1)
ディスク群を支持回転させるスピンドルと、前記磁気デ
ィスク群を前記スピンドルに固定するクランプリングと
、情報記録再生用複数の磁気ヘッドと、前記磁気ヘッド
を保持し位置決めを行うキャリッジとを具備する磁気デ
ィスク装置において、前記磁気ディスク群と前記複数の
磁気ヘッドのヘッドアームとを互いの線膨張係数の差が
僅少で且つ正負関係が一定となるアルミ合金材料で各々
を形成したことを特徴とする磁気ディスク装置。A spacer ring for stacking a group of magnetic disks, a spindle for supporting and rotating the group of magnetic disks, a clamp ring for fixing the group of magnetic disks to the spindle, a plurality of magnetic heads for recording and reproducing information, and holding the magnetic head. and a carriage for positioning, the magnetic disk group and the head arms of the plurality of magnetic heads are made of an aluminum alloy material with a slight difference in coefficient of linear expansion and a constant positive/negative relationship. A magnetic disk device characterized by forming each.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17604586A JPS6332793A (en) | 1986-07-25 | 1986-07-25 | Magnetic disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17604586A JPS6332793A (en) | 1986-07-25 | 1986-07-25 | Magnetic disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6332793A true JPS6332793A (en) | 1988-02-12 |
Family
ID=16006753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17604586A Pending JPS6332793A (en) | 1986-07-25 | 1986-07-25 | Magnetic disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6332793A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60201578A (en) * | 1984-03-25 | 1985-10-12 | Fujitsu Ltd | Arm for magnetic disk device |
JPS61123068A (en) * | 1984-11-20 | 1986-06-10 | Fujitsu Ltd | Magnetic head arm |
-
1986
- 1986-07-25 JP JP17604586A patent/JPS6332793A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60201578A (en) * | 1984-03-25 | 1985-10-12 | Fujitsu Ltd | Arm for magnetic disk device |
JPS61123068A (en) * | 1984-11-20 | 1986-06-10 | Fujitsu Ltd | Magnetic head arm |
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