JPS61148681A - Floating head supporting mechanism - Google Patents
Floating head supporting mechanismInfo
- Publication number
- JPS61148681A JPS61148681A JP27113584A JP27113584A JPS61148681A JP S61148681 A JPS61148681 A JP S61148681A JP 27113584 A JP27113584 A JP 27113584A JP 27113584 A JP27113584 A JP 27113584A JP S61148681 A JPS61148681 A JP S61148681A
- Authority
- JP
- Japan
- Prior art keywords
- floating head
- floating
- load
- magnetic disk
- load applied
- 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
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は磁気ディスク装置における浮動ヘッドの浮上す
きまを所定の値に保つための浮動ヘッド支持機構に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a floating head support mechanism for maintaining a flying clearance of a floating head at a predetermined value in a magnetic disk device.
第５図は磁気ディスクの装置に用いられている従来の浮
動ヘッド支持機構をモデル化して示したものである。FIG. 5 shows a model of a conventional floating head support mechanism used in a magnetic disk device.
１は浮動ヘッド、２は加圧ばね、２−１は加圧ばね曲げ
部、３は浮動ヘラＰ支持棒であり、１．２．３で浮動ヘ
ッド支持機構４を構成する。1 is a floating head, 2 is a pressure spring, 2-1 is a pressure spring bending portion, 3 is a floating spatula P support rod, and 1.2.3 constitutes a floating head support mechanism 4.
５は磁気ディスクであり、またＨは磁気ディスク５０面
と浮動ヘッド支持棒３の取付高さ、ΔＨは回転する磁気
ディスク５０面ぶれ高さである。5 is a magnetic disk, H is the mounting height of the magnetic disk 50 surface and the floating head support rod 3, and ΔH is the runout height of the rotating magnetic disk 50 surface.
即ち従来の浮動ヘッド１は加圧ばね２の曲げ部２−１に
よりて荷重が与えられるため以下の様なヘッド荷重の変
化が存在する。That is, since the conventional floating head 1 is loaded by the bent portion 2-1 of the pressure spring 2, the following head load changes exist.
■ 浮動ヘッド支持棒３の磁気ディスク５の面からの取
付高さＨの誤差により浮動ヘッド１に加わる荷重に誤差
を生ずる。(2) An error in the mounting height H of the floating head support rod 3 from the surface of the magnetic disk 5 causes an error in the load applied to the floating head 1.
■ 磁気ディスク５０面ぶれ高さΔＨＫより浮動ヘッド
１に加わる荷重が変動する。(2) The load applied to the floating head 1 fluctuates due to the runout height ΔHK of the magnetic disk 50.
ここで浮動ヘッド１の浮上すきまは磁気ディスク５の面
忙つれ回る空気流による動圧力と加圧ばね２によって与
えられる荷重とがつり合っである値に保たれる。従って
加圧はね２による荷重が■、■で述べた様に変化すると
それに応じて浮動ヘッド１の浮上すきまも変化するとい
う欠点があった。Here, the flying clearance of the floating head 1 is maintained at a value where the dynamic pressure caused by the airflow that rotates around the surface of the magnetic disk 5 and the load applied by the pressure spring 2 are balanced. Therefore, when the load caused by the pressure splash 2 changes as described in (1) and (3), the flying clearance of the floating head 1 also changes accordingly.
本発明はこれらの欠点を除去するため、上下可動機構部
の先端に浮動ヘッド及び加圧ばねから成る浮動ヘッド支
持部を配置し１、さらにこの上下可動機構部を制御する
ための素子を浮動ヘッド支持部のいずれかの位置に設置
し、浮動ヘッドに加わる荷重を制御しその浮上すきまを
所定の値に保つことを可能にしたもので以下図面につい
て詳細に説明する。In order to eliminate these drawbacks, the present invention arranges a floating head support section consisting of a floating head and a pressure spring at the tip of the vertically movable mechanism section 1, and further includes an element for controlling this vertically movable mechanism section on the floating head. It is installed at any position on the support part, and makes it possible to control the load applied to the floating head and maintain the flying clearance at a predetermined value.The drawings will be described in detail below.
第１図は本発明の一実施例である。１〜５は第５図と同
一部分であり、６は歪ｒ−ジ、７は上下可動機構部の一
例としての圧電バイモルフ素子である。１，２，３，６
．７で本発明浮動ヘッド支持機構８を構成する。FIG. 1 shows an embodiment of the present invention. 1 to 5 are the same parts as in FIG. 5, 6 is a strain r-gear, and 7 is a piezoelectric bimorph element as an example of a vertically movable mechanism section. 1, 2, 3, 6
．． 7 constitutes a floating head support mechanism 8 of the present invention.
歪ｒ−ノロは加圧ばね２．の曲げ部２−１に設置するこ
とにより浮動ヘッド１に加わる荷重を検出することが可
能である。従ってこの歪ｙ −シロＶｃより検出される
荷重がある所定の値となるように圧電バイモルフ素子７
を上下に駆動することで前述した浮動ヘット°支持棒３
の取付高さの誤差あるｂは磁気ディスク５の面ぶれ高さ
による浮動ヘッド１に対する荷重変化を吸収することが
可能となり、ひいては浮動ヘッドｌの浮上すきまを所定
の値に保つことを可能とする。Strain r-noro is pressure spring 2. By installing it at the bent portion 2-1 of the floating head 1, it is possible to detect the load applied to the floating head 1. Therefore, the piezoelectric bimorph element 7
By driving the above-mentioned floating head ° support rod 3 up and down,
The mounting height error b makes it possible to absorb changes in the load on the floating head 1 due to the surface runout height of the magnetic disk 5, and in turn makes it possible to maintain the flying clearance of the floating head l at a predetermined value. .
以上の機能を確認するため第２図の様なモデル実験を行
った。１．２．２−１．３，６，７゜８は第１図と共通
であり、９は浮動ヘッドの高さ変化を与えるための加振
器である。In order to confirm the above functions, we conducted a model experiment as shown in Figure 2. 1.2.2-1.3, 6, 7° 8 are the same as in FIG. 1, and 9 is a vibrator for changing the height of the floating head.
第３図の■は加振器９を振幅５０−μｍ、−２、周波数
１００ Ｈｚで駆動した場合に歪ｒ−ノロで検 。3 in Figure 3 is the strain r-noro detected when the vibrator 9 is driven at an amplitude of 50 μm, -2 and a frequency of 100 Hz.
出される荷重変化を示す波形である。これに対し第３図
の■は歪ゲージ６による検出荷重出力と圧電バイモルフ
素子７の駆動電源の間に制御ループを構成し、検出荷重
出力が一定となる様に圧電バイモルフ素子７を駆動した
時、歪ｒ−シロで検出される荷重変化を示す波形である
。This is a waveform that shows the change in load. On the other hand, ■ in Fig. 3 is when a control loop is constructed between the detected load output by the strain gauge 6 and the drive power source of the piezoelectric bimorph element 7, and the piezoelectric bimorph element 7 is driven so that the detected load output is constant. , is a waveform showing a load change detected at strain r-shiro.
即ち荷重変化として約１／４に抑圧できることが判った
。さらに制御ループの利得、位相特性等を適正化すれば
この荷重変化抑圧効果は大幅に高めることが可能である
。In other words, it has been found that the load change can be suppressed to about 1/4. Furthermore, by optimizing the gain, phase characteristics, etc. of the control loop, it is possible to significantly enhance this load change suppression effect.
上述実験では圧電・々イモルフ素子７を制御するための
荷重検出素子として歪ｒ−゛シロを用いた例を示したが
、反射形ホトセンサによっても実効的な荷重検出を行う
ことが可能である。例えば第４図は反射形ホトセンサの
対象物とのす牲
きまに対する検出出力部性の一例である。対象物とのす
きまにより検出出力が大きく変化する１領域（同図人）
がある。従って第１図にお込て反射形ホトセンサを加圧
ばね２の根元に配置し。In the above-mentioned experiment, an example was shown in which a strain r-゛shiro was used as a load detection element for controlling the piezoelectric morph element 7, but it is also possible to perform effective load detection with a reflective photosensor. For example, FIG. 4 shows an example of the detection output characteristics of a reflective photosensor with respect to the gap between it and an object. One area where the detection output changes greatly depending on the gap with the target object (person in the same figure)
There is. Therefore, as shown in FIG. 1, a reflective photo sensor is placed at the base of the pressure spring 2.
磁気ディスク５の面から一定すきまを保つように圧電バ
イモルフ素子７を制御することで実効的に浮動ヘッド１
に加わる荷重を制御することが可能となる。By controlling the piezoelectric bimorph element 7 to maintain a constant clearance from the surface of the magnetic disk 5, the floating head 1 is effectively
It becomes possible to control the load applied to the
また上述実験では圧電バイモルフ素子７を上下可動機構
部として用いた例を示したが、とれを積層形圧電素子を
用いて構成することも可能である。但し積層形圧電素子
は変位量が圧電バイモルフ素子に比し小さいので何らか
の変位拡大機構を必要とする。Further, in the above experiment, an example was shown in which the piezoelectric bimorph element 7 was used as the vertically movable mechanism part, but it is also possible to configure the lever using a laminated piezoelectric element. However, since the amount of displacement of the laminated piezoelectric element is smaller than that of the piezoelectric bimorph element, some kind of displacement amplification mechanism is required.
以上説明した様に本発明によれば、浮動へ。 As explained above, according to the present invention, floating occurs.
ドに加わる荷重を制御することにより浮動ヘッド支持機
構の磁気ディスクに対する取付誤差、あるいは磁気ディ
スク面ぶれにより生ずる荷重変化を抑圧することが可能
となる。即ちこのことは、従来の浮動ヘッド支持機構に
比べて浮動ヘッドの浮上すきまを一定に保つ能力が高い
ということに他ならない。By controlling the load applied to the magnetic disk, it is possible to suppress changes in load caused by installation errors of the floating head support mechanism with respect to the magnetic disk, or variations in the surface of the magnetic disk. That is, this means that the ability to maintain a constant flying clearance of the floating head is higher than that of the conventional floating head support mechanism.
また浮動ヘッドは磁気ディスクとの相対速度によっても
浮上すきまが変化するが、本発明によれば浮動ヘッドに
加わる荷重を任意に制御できるので、相対速度変化によ
る浮上すきま変化も抑圧することが可能という利点があ
る。Furthermore, the flying clearance of a floating head changes depending on the relative speed with the magnetic disk, but according to the present invention, the load applied to the floating head can be controlled arbitrarily, so it is possible to suppress changes in the flying clearance due to changes in relative speed. There are advantages.
第１図は本発明の一実施例を示す構成説明図２、第２図
は第１図の浮動ヘッド支持機構の実験例を示す構成説明
図、第３図は本発明に係る歪ゲージで検出される荷重変
化の一例を示す波形図、Ｉ！４図は本発明に係る反射形
ホトセン・すのすきる。
１・・・浮動ヘッド、２・・・加圧ばね、２−１・・・
ばね曲げ部、３・・・浮動ヘッド支持棒、４・・・従来
の浮動ヘッド支持機構、５・・・磁気ディスク、６・・
・歪ｒ−ジ、７・・・圧電バイモルフ素子、８・・・本
発明の浮動ヘッド支持機構の一例、９・・・加振器。
出願人代理人 弁理士 鈴 江 武 彦１１ 図
８
通 ２ 図 ８Fig. 1 is an explanatory diagram of a configuration showing one embodiment of the present invention; Fig. 2 is an explanatory diagram of a configuration showing an experimental example of the floating head support mechanism of Fig. 1; and Fig. 3 is a diagram illustrating a configuration detected by a strain gauge according to the present invention. A waveform diagram showing an example of load change, I! Figure 4 shows a reflective photosen/sunoshiki according to the present invention. 1... Floating head, 2... Pressure spring, 2-1...
Spring bending portion, 3... Floating head support rod, 4... Conventional floating head support mechanism, 5... Magnetic disk, 6...
- Strain r-di, 7... Piezoelectric bimorph element, 8... An example of the floating head support mechanism of the present invention, 9... Vibrator. Applicant's agent Patent attorney Takehiko Suzue 11 Figure
8 letters 2 Figure 8
Claims (1)
る浮動ヘッド支持部を配置し、さらに前記浮動ヘッドに
加わる荷重を制御するように前記上下可動機構部を制御
する素子を前記浮動ヘッド支持部に設置したことを特徴
とする浮動ヘッド支持機構。A floating head support section consisting of a floating head and a pressure spring is disposed at the tip of the vertically movable mechanism section, and an element for controlling the vertically movable mechanism section is arranged in the floating head support section to control the load applied to the floating head. A floating head support mechanism characterized by being installed in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27113584A JPS61148681A (en) | 1984-12-22 | 1984-12-22 | Floating head supporting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27113584A JPS61148681A (en) | 1984-12-22 | 1984-12-22 | Floating head supporting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61148681A true JPS61148681A (en) | 1986-07-07 |
Family
ID=17495803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27113584A Pending JPS61148681A (en) | 1984-12-22 | 1984-12-22 | Floating head supporting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61148681A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02192082A (en) * | 1988-10-04 | 1990-07-27 | Yotaro Hatamura | Supporting device for information reading head |
| EP0665548A1 (en) * | 1993-12-31 | 1995-08-02 | Samsung Electronics Co., Ltd. | Hard disk drives |
| US5663854A (en) * | 1995-06-07 | 1997-09-02 | International Business Machines Corporation | Prebent ceramic suspension |
| EP0944041A1 (en) * | 1996-02-20 | 1999-09-22 | Myrica (UK) Limited | Suspension arm with memory actuation element |
| US6049443A (en) * | 1995-06-07 | 2000-04-11 | International Business Machines Corporation | Suspension bent by stressed patch |
-
1984
- 1984-12-22 JP JP27113584A patent/JPS61148681A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02192082A (en) * | 1988-10-04 | 1990-07-27 | Yotaro Hatamura | Supporting device for information reading head |
| EP0665548A1 (en) * | 1993-12-31 | 1995-08-02 | Samsung Electronics Co., Ltd. | Hard disk drives |
| US5663854A (en) * | 1995-06-07 | 1997-09-02 | International Business Machines Corporation | Prebent ceramic suspension |
| US5963397A (en) * | 1995-06-07 | 1999-10-05 | International Business Machines Corporation | Ceramic suspension bent by stressed patch |
| US6049443A (en) * | 1995-06-07 | 2000-04-11 | International Business Machines Corporation | Suspension bent by stressed patch |
| EP0944041A1 (en) * | 1996-02-20 | 1999-09-22 | Myrica (UK) Limited | Suspension arm with memory actuation element |
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