JPS649664B2 - - Google Patents
Info
- Publication number
- JPS649664B2 JPS649664B2 JP8633482A JP8633482A JPS649664B2 JP S649664 B2 JPS649664 B2 JP S649664B2 JP 8633482 A JP8633482 A JP 8633482A JP 8633482 A JP8633482 A JP 8633482A JP S649664 B2 JPS649664 B2 JP S649664B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- shaft
- dynamic vibration
- view
- positioning mechanism
- 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
- 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
Landscapes
- Moving Of Heads (AREA)
- Control Of Position Or Direction (AREA)
Description
【発明の詳細な説明】
本発明は、磁気デイスク装置のシヤフトに動吸
振器を設けた回転形磁気ヘツド位置決め機構に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary magnetic head positioning mechanism in which a dynamic vibration reducer is provided on the shaft of a magnetic disk drive.
第１図及び第２図は、従来の回転形磁気ヘツド
位置決め機構を有する磁気デイスク装置の一例の
平面図及びＡ−Ａ断面図である。両図において、
アーム１はシヤフト２に固定され、シヤフト２は
ハウジング３に回転可能に支持されている。シヤ
フト２はベアリング４ａ，４ｂで支持され、ベア
リング４ａは、ばね５によりプリロードを与えら
れると同時にハウジング３により支持されてい
る。アーム１の先端部には、磁気デイスク６から
のデータを読み取り、あるいは磁気デイスク６へ
データを書き込むための矢印（図示）方向に移動
可能な磁気ヘツド７が取付けてある。一方シヤフ
ト２にはアーム１の反対側の位置にコイル組立体
８が取付けてある。マグネツト組立体９は、マグ
ネツト押シ板１０とハウジング３とではさみ込
み、複数本のネジによりハウジング３に固定され
ている。 1 and 2 are a plan view and a sectional view taken along the line A-A of an example of a magnetic disk device having a conventional rotary magnetic head positioning mechanism. In both figures,
The arm 1 is fixed to a shaft 2, and the shaft 2 is rotatably supported by a housing 3. The shaft 2 is supported by bearings 4a, 4b, and the bearing 4a is preloaded by a spring 5 and supported by the housing 3. A magnetic head 7 is attached to the tip of the arm 1 and is movable in the direction of the arrow (shown in the figure) for reading data from or writing data to the magnetic disk 6. On the other hand, a coil assembly 8 is attached to the shaft 2 at a position opposite to the arm 1. The magnet assembly 9 is sandwiched between the magnet push plate 10 and the housing 3, and is fixed to the housing 3 with a plurality of screws.
上記のように構成した装置において、コイル８
に矢印方向の電流ｉが流れると、コイル組立体８
に力が作用し、シヤフト２を中心としてコイル組
立体８とアーム１が回転し、磁気ヘツド７は磁気
デイスク６の内周方向に変位する。またコイル８
に逆方向の電流i′を流すと磁気ヘツド７は外周方
向に変位する。このようにして、磁気ヘツド７を
磁気デイスク６上の任意の位置に位置決めする。 In the device configured as described above, the coil 8
When a current i flows in the direction of the arrow, the coil assembly 8
A force acts on the coil assembly 8 and the arm 1 around the shaft 2, and the magnetic head 7 is displaced in the inner circumferential direction of the magnetic disk 6. Also coil 8
When a current i' is applied in the opposite direction to the magnetic head 7, the magnetic head 7 is displaced in the outer circumferential direction. In this way, the magnetic head 7 is positioned at an arbitrary position on the magnetic disk 6.
従来の磁気デイスク装置は、以上のように構成
されているが、ベアリング４ａ，４ｂのばね定数
に限界があるため、第３図のようにシヤフト２に
共振を生じ、磁気ヘツド７を高精度に位置決めす
ることができない欠点があつた。 The conventional magnetic disk device is constructed as described above, but since there is a limit to the spring constant of the bearings 4a and 4b, resonance occurs in the shaft 2 as shown in FIG. There was a drawback that positioning was not possible.
本発明は、上記従来の欠点であるシヤフトの共
振をおさえることを目的とするものである。 The present invention aims to suppress the resonance of the shaft, which is the drawback of the conventional technology.
本発明は、上記目的を達成するためになされた
もので、シヤフトに動吸振器を取付けた回転形磁
気ヘツド位置決め機構を提供するものである。以
下図面を用いて説明する。 The present invention has been made to achieve the above object, and provides a rotary magnetic head positioning mechanism in which a dynamic vibration reducer is attached to the shaft. This will be explained below using the drawings.
第４図は、本発明の一実施例を示す側断面図で
ある。１乃至１０は、第２図で示される従来例と
同じ機能であるため、説明を省略する。１１はシ
ヤフト２に取付けた共振をおさえるための動吸振
器で、おもり１２、粘弾性体１３（例えばゴム）
により構成されている。この動吸振器１１の共振
周波数は、シヤフト２の共振周波数とほぼ一致し
ており、シヤフト２が第３図に示すような共振を
起こすと、おもり１２はさらに大きな振幅で共振
し、シヤフト２の振動エネルギーを吸収してその
振動をおさえる。これにより磁気ヘツド７の振動
も小さくなり、高精度の位置決めが可能となる。 FIG. 4 is a side sectional view showing one embodiment of the present invention. 1 to 10 have the same functions as the conventional example shown in FIG. 2, and therefore their explanations will be omitted. Reference numeral 11 denotes a dynamic vibration absorber for suppressing resonance attached to the shaft 2, which includes a weight 12 and a viscoelastic body 13 (for example, rubber).
It is made up of. The resonant frequency of this dynamic vibration absorber 11 almost matches the resonant frequency of the shaft 2, and when the shaft 2 causes resonance as shown in FIG. Absorbs vibrational energy and suppresses the vibration. This reduces the vibration of the magnetic head 7, allowing highly accurate positioning.
第５図は本発明の他の実施例の要部の平面図、
第６図はそのＣ−Ｃ側断面図である。両図はシヤ
フト２に、おもり１２を支持する板ばね１４、板
ばね１４に設けた穴１５、オイル１６、オイルシ
ール１７より構成された動吸振器１１を取付けた
状態を示している。本実施例では、第４図の粘弾
性体１３のかわりに板ばね１４を用い、粘性はオ
イル１６が穴１５を通過して移動することにより
発生させる。 FIG. 5 is a plan view of the main parts of another embodiment of the present invention;
FIG. 6 is a sectional view taken along the line CC. Both figures show a state in which a dynamic vibration reducer 11, which is composed of a leaf spring 14 supporting a weight 12, a hole 15 provided in the leaf spring 14, an oil 16, and an oil seal 17, is attached to the shaft 2. In this embodiment, a leaf spring 14 is used in place of the viscoelastic body 13 shown in FIG. 4, and viscosity is generated by the movement of oil 16 through holes 15.
第７図は、動吸振器１１をシヤフトの両側にそ
れぞれ取付けた実施例の側断面図を示す。 FIG. 7 shows a side sectional view of an embodiment in which dynamic vibration absorbers 11 are attached to both sides of the shaft.
以上本発明の実施例について説明したが、本発
明はこれに限定するものではなく、本発明の要旨
を逸脱しない範囲で適宜変更しうることは言う迄
もない。 Although the embodiments of the present invention have been described above, it goes without saying that the present invention is not limited thereto and may be modified as appropriate without departing from the gist of the present invention.
以上の説明から明らかなように、本発明によれ
ば、シヤフトの動吸振器を取付けることにより、
シヤフト磁気ヘツドの振動をおさえることがで
き、高精度の磁気ヘツドの位置決めが可能とな
り、実施による効果大である。 As is clear from the above description, according to the present invention, by installing a dynamic vibration absorber on the shaft,
The vibration of the shaft magnetic head can be suppressed and the positioning of the magnetic head can be performed with high precision, so that the effect of implementation is large.
第１図は従来例の平面図、第２図は第１図のＡ
−Ａ断面図、第３図は第１図のＢ方向からみたシ
ヤフトの振動モードをあらわす側面図、第４図は
本発明実施例の側面図、第５図は本発明の他の実
施例の要部を示す平面図、第６図は第５図のＣ−
Ｃ断面図、第７図は本発明の他の実施例の側断面
図である。
シヤフト…２、ハウジング…３、ばね…５、磁
気ヘツド…７、動吸振器…１１、おもり…１２、
粘弾性体…１３、ばね…１４、オイル…１６。
Figure 1 is a plan view of the conventional example, Figure 2 is A of Figure 1.
-A sectional view, FIG. 3 is a side view showing the vibration mode of the shaft seen from direction B in FIG. 1, FIG. 4 is a side view of an embodiment of the present invention, and FIG. 5 is a side view of another embodiment of the present invention. A plan view showing the main parts, Figure 6 is C- in Figure 5.
C sectional view and FIG. 7 are side sectional views of other embodiments of the present invention. Shaft...2, Housing...3, Spring...5, Magnetic head...7, Dynamic vibration reducer...11, Weight...12,
Viscoelastic body...13, Spring...14, Oil...16.
Claims (1)
のハウジングに軸支されたシヤフトに振動を衰退
させる部材を取付ける機構において、 前記振動を衰退させる部材は、前記シヤフトの
共振周波数とほぼ同値の共振周波数を有する動吸
振器であることを特徴とする回転形磁気ヘツド位
置決め機構。 ２ 動吸振器の構成要素として、ゴム等の粘弾性
体とおもりとを用いたことを特徴とする特許請求
の範囲第１項記載の磁気ヘツド位置決め機構。 ３ 動吸振器の構成要素としてばね、オイル、お
もりを用いたことを特徴とする特許請求の範囲第
１項記載の磁気ヘツド位置決め機構。[Scope of Claims] 1. A mechanism for attaching a vibration attenuating member to a shaft pivotally supported by a housing of a magnetic disk device having a rotating magnetic head, wherein the vibration attenuating member has a frequency approximately equal to the resonant frequency of the shaft. A rotary magnetic head positioning mechanism characterized by being a dynamic vibration absorber having the same resonant frequency. 2. The magnetic head positioning mechanism according to claim 1, wherein a viscoelastic body such as rubber and a weight are used as components of the dynamic vibration absorber. 3. The magnetic head positioning mechanism according to claim 1, wherein a spring, oil, and weight are used as components of the dynamic vibration absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8633482A JPS58203674A (en) | 1982-05-21 | 1982-05-21 | Positioning mechanism for rotary magnetic head of magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8633482A JPS58203674A (en) | 1982-05-21 | 1982-05-21 | Positioning mechanism for rotary magnetic head of magnetic disk device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58203674A JPS58203674A (en) | 1983-11-28 |
| JPS649664B2 true JPS649664B2 (en) | 1989-02-20 |
Family
ID=13883938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8633482A Granted JPS58203674A (en) | 1982-05-21 | 1982-05-21 | Positioning mechanism for rotary magnetic head of magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58203674A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7352537B2 (en) | 2005-06-24 | 2008-04-01 | Hitachi Global Storage Technologies Netherlands B.V. | Tuned damper for disk drive actuator arm |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5570973A (en) * | 1978-11-22 | 1980-05-28 | Nec Corp | Rotary type positioning mechanism for magnetic disc |
| JPS55101163A (en) * | 1979-01-22 | 1980-08-01 | Nippon Telegr & Teleph Corp <Ntt> | Swing arm-type head positioning unit |
| JPS578965A (en) * | 1980-06-18 | 1982-01-18 | Comput Basic Mach Technol Res Assoc | Access device of magnetic disk device |
-
1982
- 1982-05-21 JP JP8633482A patent/JPS58203674A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58203674A (en) | 1983-11-28 |
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