JPS6048054B2 - magnetic disk device - Google Patents
magnetic disk deviceInfo
- Publication number
- JPS6048054B2 JPS6048054B2 JP1658178A JP1658178A JPS6048054B2 JP S6048054 B2 JPS6048054 B2 JP S6048054B2 JP 1658178 A JP1658178 A JP 1658178A JP 1658178 A JP1658178 A JP 1658178A JP S6048054 B2 JPS6048054 B2 JP S6048054B2
- Authority
- JP
- Japan
- Prior art keywords
- disk device
- magnetic disk
- head
- belt
- carriage
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
Landscapes
- Rotational Drive Of Disk (AREA)
Description
【発明の詳細な説明】 本発明は磁気テイスク装置の改良に関するものてある。[Detailed description of the invention] The present invention relates to improvements in magnetic tape devices.
第１図に従来使用されている磁気ディスク装置を示す。
図中、１は回転軸、２はキャリッジである。回転軸１の
スピンドル部３は、ハウジング４に軸受５、５’を介し
回転自在に支持され、第２図に示すようにモータ６によ
りプーリ７、ベルト８、プーリ９を介し駆動されて回転
する。回転軸１には複数枚の円板１０が所定のピッチで
同心に固定されている。キャリッジ２には複数個のヘッ
ドアーム１１が円板１０と同ピッチで固定されており、
各ヘッドアーム１１には各円板１０にそれぞれ対応する
読取、書込用ヘッド１２が固定されている。キャリッジ
２はパルスモータ等の駆動源２０により駆動されて矢印
Ａ、Ａ’方向（シーク方向）に移動する。なお、１３は
サーボヘッドて、キャリッジ２の移動量を制御して円板
１０に対しヘッド１２を位置決めする。また、１４（第
２図参照）はスプリングで、このスプリング１４により
張力を付与されるベルト８は、スピンドル部３を矢印Ａ
方向に引張つている。このような磁気ディスク装置にお
いては、一般にスピンドル部３は鉄材料より形成され、
かつハウジング４はアルミニウム等の軽合金材料より形
成されてり、両者の熱膨脹係数は異なる。FIG. 1 shows a conventionally used magnetic disk device.
In the figure, 1 is a rotating shaft, and 2 is a carriage. The spindle portion 3 of the rotating shaft 1 is rotatably supported by a housing 4 via bearings 5, 5', and is rotated by being driven by a motor 6 via a pulley 7, a belt 8, and a pulley 9, as shown in FIG. . A plurality of discs 10 are fixed concentrically to the rotating shaft 1 at a predetermined pitch. A plurality of head arms 11 are fixed to the carriage 2 at the same pitch as the disc 10,
A reading/writing head 12 corresponding to each disk 10 is fixed to each head arm 11. The carriage 2 is driven by a drive source 20 such as a pulse motor and moves in the directions of arrows A and A' (seek direction). Note that a servo head 13 controls the amount of movement of the carriage 2 to position the head 12 with respect to the disk 10. Further, reference numeral 14 (see FIG. 2) is a spring, and the belt 8 to which tension is applied by the spring 14 moves along the spindle portion 3 as indicated by the arrow A.
It is pulled in the direction. In such a magnetic disk device, the spindle portion 3 is generally made of iron material,
Furthermore, the housing 4 is made of a light alloy material such as aluminum, and both have different coefficients of thermal expansion.
従つて装置使用時に環境温度が変化する場合、スピンド
ル部３とハウジング４の伸びは軸方向、半径方向ともに
異なる。この内、軸方向の伸びの差はハウジング４と軸
受５、５’との間のすベリにより解決できるが、半径方
向の伸びの差はハウジング４と軸受５、５’の間隙とな
つてあられれ、温度上昇が大きくなるとこの間隙は増大
する。その結果、ベルト８により矢印方向に引張られて
いるスピンドル部３は、第３図に示すように、ハウジン
グ４のスピンドル部３嵌合部の中心線０−０’に対しθ
度の傾きを生じる。その結果円板１０も右下りに傾斜し
、ヘッド１２位置決め時にオフトラック（データ書込時
のトラック位置と読取時のヘフツド停止位置とのずれ）
を生じデータの信頼特性が低下してしまい。近時トラッ
ク高密度化が進みトラック幅が数十μｍ程度になつてい
る現状では重大な欠点となつている。このオフトラック
の量は、サーボヘッド１３から一番離れたヘッド１２５
（一番上のヘッド１２）が一番大きくなる。本発明は上
述の欠点を解決するためのもので、環境温度が上昇した
時のオフトラックの問題と解決できる磁気ディスク装置
を提供することを目的どしている。次に第４図および第
５図に関連して本発明の実施例を説明する。第４図に第
１の実施例を示す。Therefore, when the environmental temperature changes during use of the device, the elongation of the spindle portion 3 and the housing 4 will differ in both the axial and radial directions. Of these, the difference in elongation in the axial direction can be solved by a gap between the housing 4 and the bearings 5, 5', but the difference in elongation in the radial direction can be solved by the gap between the housing 4 and the bearings 5, 5'. This gap increases as the temperature rises. As a result, the spindle part 3, which is being pulled in the direction of the arrow by the belt 8, is θ
produces a degree of inclination. As a result, the disk 10 also tilts downward to the right, causing off-track when positioning the head 12 (difference between the track position when writing data and the head stop position when reading data).
This results in a decrease in the reliability characteristics of the data. This is a serious drawback in the current situation where the track density has recently become higher and the track width has become approximately several tens of micrometers. The amount of off-track is determined by the head 125 located farthest from the servo head 13.
(The top head 12) is the largest. The present invention is intended to solve the above-mentioned drawbacks, and it is an object of the present invention to provide a magnetic disk device that can solve the off-track problem when the environmental temperature rises. Next, an embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 shows a first embodiment.
本例では、スピンドル駆動用のモータ２１は従来よりす
れた位置（線イーイよりすれた位置に設けられており、
スピンドル部３は、このモータ２１の出力軸に固定され
たプーリ２２により、該プーリ２２、スプリング２３に
より矢印Ｂ方向に賦勢されるテンションプーリ２牡およ
びプー１Ｊ９にかけわたされたベルト２５を介し駆動さ
れる。In this example, the motor 21 for driving the spindle is provided at a position that is closer to the conventional line (a position that is closer to the line E).
The spindle unit 3 is driven by a pulley 22 fixed to the output shaft of the motor 21, through a tension pulley 2 which is biased in the direction of arrow B by a spring 23, and a belt 25 which is passed around the pulley 1J9. be done.
この場合、モータ２１とテンシヨンプー１Ｊ２４は、ス
ピンドル部３の中心を通りイーイと直交する線ロー帽こ
対し対称の位置に設けられている。その結果、スピンド
ル部３に加わるベルト２５の張力の方向はキャリッジ２
のシーク方向と直交する。従つて、環境温度が変化して
前述のようにスピンドル部３すなわち円板１０が傾斜し
てもオフトラックとは無関係となり、ヘッド位置決め時
のオフトラックの問題を防止することができる。第５図
に第２の実施例を示す。本例では、スピンドル駆動用の
モータ３１は線口ー口上に設けられており、スピンドル
部３はモータ３１によリブー１Ｊ３２、ベルト３３、プ
ーリ９を介し駆動される。In this case, the motor 21 and the tension pulley 1J24 are provided at symmetrical positions with respect to a line that passes through the center of the spindle portion 3 and is orthogonal to E. As a result, the direction of the tension of the belt 25 applied to the spindle portion 3 is
perpendicular to the seek direction of Therefore, even if the spindle portion 3, that is, the disk 10 is tilted as described above due to a change in the environmental temperature, it has no relation to off-track, and it is possible to prevent off-track problems during head positioning. FIG. 5 shows a second embodiment. In this example, a motor 31 for driving a spindle is provided above the line port, and the spindle portion 3 is driven by the motor 31 via a rib 1J32, a belt 33, and a pulley 9.
３４はベルト３３に張力を付与するスプリングである。34 is a spring that applies tension to the belt 33.
この場合もスピンドル部３に加わるベルト３３の張力の
方向はキャリッジ２のシーク方向と直交する。従つて、
前例と同様にヘッド位置決め時のオフトラックの問題を
防止することができる。以上述べたように、本発明によ
れば、スピンドル部にかかるベルトの張力の方向はキャ
リッジのシーク方向と直交するようになつているため、
環境温度変化によりスピンドル部が傾斜してヘツドノ位
置決め時にオフトラックを生ずることはない。In this case as well, the direction of the tension of the belt 33 applied to the spindle portion 3 is perpendicular to the seek direction of the carriage 2. Therefore,
As in the previous example, off-track problems during head positioning can be prevented. As described above, according to the present invention, the direction of the tension of the belt applied to the spindle section is perpendicular to the seek direction of the carriage.
There is no possibility that the spindle will tilt due to changes in environmental temperature and cause off-track during head positioning.
第１図は従来の磁気ディスク装置の正面断面図、第２図
は同回転軸の駆動要領図、第３図は同環境温度変化によ
る回転軸傾斜説明図、第４図は本発明に係る磁気ディス
ク装置の第１の実施例の回転軸駆動要領図、第５図は同
第２２の実施例の回転軸駆動要領図である。
図中、１は回転軸、２はキャリッジ、３はスピンドル部
、４はハウジング、５，５″は軸受、９，２２，３２は
プーリ、１０は円板、１１はヘッドアーム、１２は読取
、書込用ヘッド、１３はサーボヘッド、２０は駆動源、
２１，３１はモータ、２３，３４はスプリング、２４は
テンシヨンプー１八２５，３３はベルトである。Fig. 1 is a front sectional view of a conventional magnetic disk device, Fig. 2 is a diagram of the driving procedure of the rotary shaft, Fig. 3 is an explanatory diagram of the inclination of the rotary shaft due to environmental temperature changes, and Fig. 4 is a magnetic disk device according to the present invention. FIG. 5 is a diagram showing how to drive the rotary shaft of the first embodiment of the disk device, and FIG. 5 is a diagram showing how to drive the rotary shaft of the 22nd embodiment. In the figure, 1 is a rotating shaft, 2 is a carriage, 3 is a spindle part, 4 is a housing, 5, 5'' are bearings, 9, 22, 32 are pulleys, 10 is a disk, 11 is a head arm, 12 is a reader, a writing head, 13 a servo head, 20 a drive source,
21 and 31 are motors, 23 and 34 are springs, 24 is a tension pulley 18, and 25 and 33 are belts.
Claims (1)
りベルトを介し駆動さる回転軸と、該回転軸に固定され
た円板と、該円板に対応する読取、書込用ヘッドを固定
し駆動源により駆動されるキャリッジとを備えた磁気デ
ィスク装置において、前記回転軸に加わる前記ベルトの
張力の方向を前記キャリッジのシーク方向と直交するよ
うにしたことを特徴とする磁気ディスク装置。1. A rotating shaft supported by a housing via two bearings and driven by a drive shaft via a belt, a disk fixed to the rotating shaft, and a reading/writing head corresponding to the disk fixed to the drive source. 1. A magnetic disk device comprising: a carriage driven by a magnetic disk device, wherein the direction of the tension of the belt applied to the rotating shaft is orthogonal to the seek direction of the carriage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1658178A JPS6048054B2 (en) | 1978-02-17 | 1978-02-17 | magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1658178A JPS6048054B2 (en) | 1978-02-17 | 1978-02-17 | magnetic disk device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54109812A JPS54109812A (en) | 1979-08-28 |
| JPS6048054B2 true JPS6048054B2 (en) | 1985-10-25 |
Family
ID=11920238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1658178A Expired JPS6048054B2 (en) | 1978-02-17 | 1978-02-17 | magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6048054B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0418120Y2 (en) * | 1985-10-07 | 1992-04-22 |
-
1978
- 1978-02-17 JP JP1658178A patent/JPS6048054B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54109812A (en) | 1979-08-28 |
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