JPH01113966A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPH01113966A JPH01113966A JP27017987A JP27017987A JPH01113966A JP H01113966 A JPH01113966 A JP H01113966A JP 27017987 A JP27017987 A JP 27017987A JP 27017987 A JP27017987 A JP 27017987A JP H01113966 A JPH01113966 A JP H01113966A
- Authority
- JP
- Japan
- Prior art keywords
- head
- arm
- center line
- magnetic disk
- fixed
- 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
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
Landscapes
- Supporting Of Heads In Record-Carrier Devices (AREA)
- Moving Of Heads (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係シ、特に高速高密度形の
装置に好適なものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to magnetic disk devices, and is particularly suitable for high-speed, high-density devices.
従来のこの種の装置は１例えば米国特許第４６２０２５
１号明細書に開示されているように、スライダと支持体
とアーム部とからなるアクチュエータ部はその中心線に
対し対称な講造になっていた。A conventional device of this type is one such as US Pat. No. 4,620,255.
As disclosed in the specification of No. 1, the actuator section consisting of a slider, a support body, and an arm section has a symmetrical structure with respect to its center line.
上記従来技術は、アーム部あるいは複数あるアーム部間
の振動特性について配慮がされておらず。The above-mentioned conventional technology does not take into account the vibration characteristics of the arm or between the plurality of arm parts.
高精度にヘッドを位置決めする場合の障害となっていた
。This has been an obstacle in positioning the head with high precision.
本発明の目的は、複数あるアーム部間の共鳴振動を抑制
することにより高精度にヘッド位置決めができるように
することにある。An object of the present invention is to enable highly accurate head positioning by suppressing resonance vibration between a plurality of arm sections.
上記目的は、ヘッド支持体を固定しているヘッドアーム
部の断面形状を、各アーム毎に変えることにより、達成
される。The above object is achieved by changing the cross-sectional shape of the head arm portion to which the head support is fixed for each arm.
複数あるアーム部の形状が全て同一であると、各々の固
有振動数も同一となり、もし一つのアームが振動しだす
と他のアームも共鳴して振動してしまう。共鳴振動が始
まると、その振幅は増大して、ヘッド位置決めに悪い影
響を与える。そこで。If the shapes of the plurality of arm parts are all the same, each natural frequency will also be the same, and if one arm begins to vibrate, the other arms will also resonate and vibrate. Once resonant vibrations begin, their amplitude increases and adversely affects head positioning. Therefore.
アーム毎の固有振動数を変更するため、１次曲げと１次
ねじりを考慮して板厚分布を変えるようにして、それら
アーム間の共鳴振動を発生しないようにした。In order to change the natural frequency of each arm, the plate thickness distribution was changed in consideration of primary bending and primary torsion to prevent resonance vibration between the arms.
以下１本発明の一実施例をｌＸ１図〜第５図を用いて説
明する。ｍ１図は本発明による磁気ディス゛ り装置を
示す平面図、第２図は第１図に示す積層へラドアーム部
の断面図、第３図は積層ヘッドアームを側面から見た側
面図、第４図はへラドアームの切欠き部の断面図、第５
図は各切欠ヘッドアームの共振周波数を示す説明図であ
る。An embodiment of the present invention will be described below with reference to FIGS. 1X1 to 5. Figure m1 is a plan view showing the magnetic disk device according to the present invention, Figure 2 is a sectional view of the laminated head arm shown in Figure 1, Figure 3 is a side view of the laminated head arm seen from the side, and Figure 4. Figure 5 is a cross-sectional view of the notch of the helad arm.
The figure is an explanatory diagram showing the resonance frequency of each notched head arm.
第１図において、情報データを記録する磁気記録媒体１
は４板積層され１回転スピンドルモータのハブ２により
固定されている。５は、記録再生を行う磁気ヘッドで、
この磁気ヘッドは、可撓性のばね部材であるヘッド支持
体６の先端に固定されている。７は、ヘッド位置決め用
のへラドアーム、８はピボットシャフト、４はへラドア
ーム７を位置決め駆動するボイスコイルモータである。In FIG. 1, a magnetic recording medium 1 for recording information data
is a stack of four plates and fixed by a hub 2 of a one-rotation spindle motor. 5 is a magnetic head for recording and reproducing;
This magnetic head is fixed to the tip of a head support 6, which is a flexible spring member. 7 is a helad arm for positioning the head, 8 is a pivot shaft, and 4 is a voice coil motor for positioning and driving the helad arm 7.
このヘッドアーム７の一部にはピボット中心とヘッドと
を結び中心線に対して非対称となる切欠部９を持ってい
る。これらアクチュエータ部は、すなわち磁気ヘッド５
１に具備したヘッド支持体６は。A part of the head arm 7 has a notch 9 that connects the pivot center and the head and is asymmetrical with respect to the center line. These actuator parts are the magnetic head 5.
The head support 6 provided in 1 is as follows.
ピボットシャフト８を中心として回転駆動するヘッドア
ーム７の先端に取付けられ、このボイスコイルモータ４
によってシーク動作する構成となっている−０
第２図は、積層しであるヘッドアーム７を磁気ヘッド側
から見た側面図である。記録媒体は４枚あるので、磁気
ヘッドは５−１から５−８まで合計８個、またヘッド支
持体も６−１から６−８まで合計８個ある。これらヘッ
ド支持体を固定したヘッドアームは７−１から７−５ま
で合計５個ある。第３図はこのヘッドアーム７を記録媒
体外周側から見た側面図を示す。ヘッドアーム７の中央
付近には切欠き部があ凱この断面を第４図に示しである
。平均厚さはｔであるが１片側から長さｔだけの部分は
厚さｔ′の薄肉化してあり、この長さｔは５板あるヘッ
ドアーム全て異っている。The voice coil motor 4 is attached to the tip of the head arm 7 which is rotatably driven around the pivot shaft 8.
-0 FIG. 2 is a side view of the laminated head arm 7 viewed from the magnetic head side. Since there are four recording media, there are a total of eight magnetic heads from 5-1 to 5-8, and a total of eight head supports from 6-1 to 6-8. There are a total of five head arms 7-1 to 7-5 to which these head supports are fixed. FIG. 3 shows a side view of this head arm 7 viewed from the outer circumferential side of the recording medium. There is a notch near the center of the head arm 7, and a cross section of this is shown in FIG. The average thickness is t, but a portion of length t from one side is thinned to thickness t', and this length t is different for all five head arms.
したがって、ヘッドアームの曲げモード及びヘッドアー
ムのねじれモードの共振周波数は異なっている。第５図
は、全てのへラドアームの曲げ及びねじれモードの共振
周波数を模式的に示したものである。各ヘッドアームの
断面形状が異なるため。Therefore, the resonant frequencies of the bending mode of the head arm and the torsional mode of the head arm are different. FIG. 5 schematically shows the resonant frequencies of the bending and torsional modes of all helad arms. This is because the cross-sectional shape of each head arm is different.
固有振動数も異なる。すなわち、薄板長さｔの大きいほ
ど、ねじシ振動数及び曲げ振動数共に低くなる傾向があ
る。The natural frequencies are also different. That is, the larger the thin plate length t, the lower both the screw vibration frequency and the bending vibration frequency tend to be.
この実施例において、ヘッドがボイスコイルモータ４に
エクンーク動作にヘッド位置決めがなされる瞬間に、各
ヘッドアームには大きな外方が加わり、微小な固有振動
が発生する。しかし、５つ−のへラドアームの固有振動
数は異なる為、互いに共鳴し合うことなくすぐに減衰す
る。したがって。In this embodiment, at the moment when the head is positioned by the voice coil motor 4 in an evacuation motion, a large outward force is applied to each head arm, generating minute natural vibrations. However, since the natural frequencies of the five Herad arms are different, they do not resonate with each other and quickly attenuate. therefore.
素速くヘッドが正確に目標トラックに位置決めがなされ
る。The head is quickly and accurately positioned on the target track.
本発明によれば、複数あるヘッドアームの構造を各々非
対称性の程度をずらし、固有振動数を変えであるので、
ヘッドアームの共鳴振動を防止してヘッドを正確に位置
決めできる効果がある。According to the present invention, since the structure of a plurality of head arms has different degrees of asymmetry and different natural frequencies,
This has the effect of preventing resonance vibration of the head arm and accurately positioning the head.
第１図は本発明の一実施例を示す磁気ディスク装置の平
面図、第２図は第１図の磁気ディスク装置のへラドアー
ム部の断面図、第３図は第２図の側面図、第４図は第３
図ヘッドアーム切欠部の断面図、第５図は異なる切欠部
を持つヘッドアームの固有振動数を示す図である。
５・・・磁気ヘッド、６・・・ヘッド支持体、７・・・
ヘッドアーム、９・・・切欠部。
代理人 弁理士 小川勝男 ・
ゝ゛パソ
第 １ 図
５１庇り（ヘヅト。
６ へ、−／￥°支特イ本
７ ヘヅド了−ム
ｑ ｔ、７７欠合ｙ
■ ５ 口
庫内部（Ｃ〕の４４ゴ1 is a plan view of a magnetic disk device showing an embodiment of the present invention, FIG. 2 is a sectional view of the helad arm portion of the magnetic disk device of FIG. 1, and FIG. 3 is a side view of FIG. Figure 4 is the third
FIG. 5 is a sectional view of a head arm cutout, and FIG. 5 is a diagram showing the natural frequencies of head arms having different cutouts. 5... Magnetic head, 6... Head support, 7...
Head arm, 9...notch part. Agent Patent Attorney Katsuo Ogawa ・ゝ゛Paso No. 1 Figure 51 Eaves (Hezuto. 6 To, -/￥° Support Book 7 Hezudo Ryomuq t, 77 Missing y ■ 5 Inside the mouth compartment (C) 44 go
Claims (1)
回転形ディスク媒体に押付け力を持つ可撓性の支持体と
、該支持体を先端に持ちかつその中心線とほゞ同一直線
上に伸びたアーム部材と、これらアームを複数備えたヘ
ッド位置決め用アクチュエータを持つ磁気ディスク装置
において、前記中心線に対して実質的に非対称にアーム
部を構成したことを特徴とする磁気ディスク装置。 ２、特許請求範囲第１項の非対称アーム部は、その断面
端の形状を各積層アーム毎に変えることにより、その断
面中心線に対するねじれ振動中心線を変えることを特徴
とする磁気ディスク装置。[Claims] 1. Having an air bearing type slider and the slider on the tip side,
A flexible support body that has a pressing force against a rotating disk medium, an arm member that holds the support body at its tip and extends substantially in a straight line with the center line of the support body, and a head positioning device that includes a plurality of these arms. What is claimed is: 1. A magnetic disk device having an actuator, wherein the arm portion is configured substantially asymmetrically with respect to the center line. 2. A magnetic disk drive characterized in that the asymmetric arm portion according to claim 1 changes the torsional vibration center line with respect to its cross-sectional center line by changing the shape of its cross-sectional end for each laminated arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27017987A JPH01113966A (en) | 1987-10-28 | 1987-10-28 | Magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27017987A JPH01113966A (en) | 1987-10-28 | 1987-10-28 | Magnetic disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01113966A true JPH01113966A (en) | 1989-05-02 |
Family
ID=17482624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27017987A Pending JPH01113966A (en) | 1987-10-28 | 1987-10-28 | Magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01113966A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4107899A1 (en) * | 1991-03-12 | 1992-09-17 | Siemens Nixdorf Inf Syst | TRANSPORT DEVICE FOR SECTIONS OF A RECORDING CARRIER FROM A WRITING WORK |
| US5875076A (en) * | 1996-04-12 | 1999-02-23 | Fujitsu Limited | Asymmetrical actuator structure for recording-reproducing apparatus |
| US5905608A (en) * | 1997-09-19 | 1999-05-18 | International Business Machines Corporation | Dynamically tuned outer arms for improved rotary actuator performance |
-
1987
- 1987-10-28 JP JP27017987A patent/JPH01113966A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4107899A1 (en) * | 1991-03-12 | 1992-09-17 | Siemens Nixdorf Inf Syst | TRANSPORT DEVICE FOR SECTIONS OF A RECORDING CARRIER FROM A WRITING WORK |
| US5875076A (en) * | 1996-04-12 | 1999-02-23 | Fujitsu Limited | Asymmetrical actuator structure for recording-reproducing apparatus |
| US5905608A (en) * | 1997-09-19 | 1999-05-18 | International Business Machines Corporation | Dynamically tuned outer arms for improved rotary actuator performance |
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