JPS60117457A - Magnetic disc device of swing arm system - Google Patents

Magnetic disc device of swing arm system

Info

Publication number
JPS60117457A
JPS60117457A JP22415283A JP22415283A JPS60117457A JP S60117457 A JPS60117457 A JP S60117457A JP 22415283 A JP22415283 A JP 22415283A JP 22415283 A JP22415283 A JP 22415283A JP S60117457 A JPS60117457 A JP S60117457A
Authority
JP
Japan
Prior art keywords
carriage
magnetic disk
guide arm
assembly structure
carriage assembly
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
Application number
JP22415283A
Other languages
Japanese (ja)
Inventor
Katsuaki Kikuchi
勝昭 菊地
Hiroshi Oota
太田　啓
Shinobu Yoshida
忍 吉田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP22415283A priority Critical patent/JPS60117457A/en
Publication of JPS60117457A publication Critical patent/JPS60117457A/en
Pending legal-status Critical Current

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
    • 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)

Abstract

PURPOSE:To make a device light in weight, high in rigidity,and low in vibration and to improve the access capacity in a high speed with high precision by using ceramic materials having a high rigidity/mass to a carriage assembly constituting body and a spindle. CONSTITUTION:The whole or a part of a carriage assembly structure body 13 consists of ceramic materials. Since a device which is lighter-weight and has a higher rigidity and less vibration in comparison with a conventional device is produced by this constitution, the high-speed and high-precision access capacity is improved considerably. A head supporting member 19 is so set to have a length part corresponding to the distance between two heads and is coupled with a guide arm 16 consisting of ceramics in a narrow part. By this constitution of the guide arm 16, the device is more small in size and light in weight than the conventional device.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明はスウィングアーム方式磁気ディスク装置、特に
、キャリジ本体、複数個のガイドアーム、サーボガイド
アーム、ヘッド支持部材およびボイスコイルを具えるキ
ャリジセンブリ構造体の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a swing arm type magnetic disk device, and particularly to a carriage assembly structure including a carriage body, a plurality of guide arms, a servo guide arm, a head support member, and a voice coil. It is about body improvement.

〔発明の背景〕[Background of the invention]

本発明の対象であるスウィングアーム方式磁気（２） ディスク装置の典型例の構成を第１図について説明する
。図面において、１はベース、２はベース１上に設けら
れた複数枚の回転磁気ディスク（以下ディスクと称す）
で、これらのディスク２は一定の間隔を保って積層され
、かつプーリ４を介して回転されるスピンドル３に取付
けられている。The configuration of a typical example of a swing arm type magnetic (2) disk device, which is the object of the present invention, will be explained with reference to FIG. In the drawing, 1 is a base, and 2 is a plurality of rotating magnetic disks (hereinafter referred to as disks) provided on the base 1.
These disks 2 are stacked at regular intervals and are attached to a spindle 3 which is rotated via a pulley 4.

５はマグネット６を有し、前記ベース１上に取付けられ
たキャリジブロック、Ａはそのキャリッジブロック５に
枢着されたピボット軸７に取付けられたキャリッジアセ
ンブリ構造体である。前記ピポツｌ〜軸７は、その両端
がキャリッジブロック５に配設されたベアリング（図示
せず）により回転自在に支持されているので、ピボット
軸７の回転によりキャリッジアセンブリ構造体７は、そ
のピボット軸７を中心として回転される。5 is a carriage block having a magnet 6 and mounted on the base 1; A is a carriage assembly structure mounted on a pivot shaft 7 pivotally mounted to the carriage block 5; Since both ends of the pivot shaft 7 are rotatably supported by bearings (not shown) disposed in the carriage block 5, the carriage assembly structure 7 is rotated by the rotation of the pivot shaft 7. It is rotated around axis 7.

上記キャリジセンブリ構造体Ａの従来例８は第２図に示
すように、キャリジ本体９とガイドアーム群、サーボガ
イドアーム１０ａおよびヘッド支持部材（図示せず）と
を一体に結合し、この一体化された構造部１１と前記マ
グネット６内に設け（３） られ、枠体１２　ａに巻回されたボイルコイル１２とを
ねじなどにより結合して構成されている。このような従
来のキャリジアセンブリ構造体８の振動特性は、第３図
の破線りで示すとおりであり、アクセス方向曲げ共振に
よる約２．４　ＫＨｚの振動Ｄ′が最も位置決め精度に
悪影響していることを容易に理解できる。また、前記構
造体８は第４図に示す開ループ特性においても、破線Ｆ
で示すように、上記と同様に顕著なピーク値を表わす欠
点を有することが明白である。As shown in FIG. 2, the conventional example 8 of the carriage assembly structure A is such that a carriage body 9, a group of guide arms, a servo guide arm 10a, and a head support member (not shown) are integrally connected. The structure 11 is connected to the boiling coil 12 provided in the magnet 6 (3) and wound around the frame 12a by screws or the like. The vibration characteristics of such a conventional carriage assembly structure 8 are as shown by the broken line in FIG. 3, and vibration D' of about 2.4 KHz due to bending resonance in the access direction has the most adverse effect on positioning accuracy. can be easily understood. Further, the structure 8 also has the open loop characteristic shown in FIG.
As shown in , it is clear that the method has the same drawback of exhibiting a remarkable peak value as described above.

〔発明の目的〕[Purpose of the invention]

本発明は上記にかんがみキャリジセンブリ構造体および
ピボット軸にセラミック材を用い、アクセス方向の機械
的な曲げ共振点を、実稼動帯域よりも可なり高周波数帯
域に移行させ、低振動化をはかると共に、軽量化および
高剛性化をはかり、高速高精度にアクセス性能を向上さ
せることを目的とするものである。In view of the above, the present invention uses a ceramic material for the carriage assembly structure and the pivot shaft, moves the mechanical bending resonance point in the access direction to a considerably higher frequency band than the actual operating band, and aims to reduce vibration. The aim is to reduce weight and increase rigidity, and to improve access performance at high speed and with high precision.

〔発明の概要〕[Summary of the invention]

本発明は上記目的を達成するために、回転する（４） 磁気ディスクと、ベース上に固定されたキャリジブロッ
クと、このキャリジブロック枢着されたピボット軸を中
心として回動されるキャリジ本体、このキャリジ本体に
固定された読出し／書込みガイドアーム、サーボガイド
アーム、ヘッド支持部材およびボイスコイルを備えるキ
ャリジアセンブリ構造体とからなるスウイングアーへ方
式磁気ディスク装置において、前記キャリジアセンブリ
構造体の全体または一部およびピボット軸をセラミック
で形成したことを特徴とするものである。In order to achieve the above object, the present invention includes: (4) a rotating magnetic disk, a carriage block fixed on a base, a carriage body that rotates around a pivot shaft to which the carriage block is pivoted; In a swinger type magnetic disk drive comprising a carriage assembly structure including a read/write guide arm, a servo guide arm, a head support member, and a voice coil fixed to a carriage body, all or part of the carriage assembly structure Also, the pivot shaft is made of ceramic.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の実施例を図面について説明する。 Embodiments of the present invention will be described below with reference to the drawings.

その構成は、前記典型例（第１図）と大部分が同様であ
り、その異なる点はキャリジアセンブリ構造体Ａである
。Its configuration is mostly similar to the typical example (FIG. 1), with the only difference being the carriage assembly structure A.

本実施例のキャリジアセンブリ構造体１３は第５図およ
び第６図に示すように、キャリジ本体１５と一体に成形
され、かつ先端にヘッド支持部１９を取付けた複数個の
読出し／書込みガイドアーム群１６およびサーボガイド
アーム１７と、デ（５） イスク（図示せず）の間隔に対応させるためのスペーサ
１８とを、ガラス半田接合またはアルミ接合により一体
化した結合体１４に、ボイスコイル群１２を前記接合法
により一体に結合して構成されている。しかも前記キャ
リジアセンブリ構造体１３は、その全部または一部がセ
ラミックス材により構成されている。前記ガイドアーム
１６゜１７の先端には、読出し／書込みヘッド（図示せ
ず）を支持するヘッド支持部材１９が取付けられている
が、このヘッド支持部材１９を省略して直接に前記ヘッ
ドを取付けるようにしてもよい。このように構成すれば
、従来のキャリジアセンブリ構造体８　（第２図）より
も、軽量で、かつ高剛性を有する低振動化のものを製作
できるから、高速高精度アクセス性能を大幅に向上させ
ることができる。As shown in FIGS. 5 and 6, the carriage assembly structure 13 of this embodiment is formed integrally with the carriage body 15 and includes a group of multiple read/write guide arms each having a head support 19 attached to the tip thereof. The voice coil group 12 is attached to a combined body 14 in which a servo guide arm 16 and a servo guide arm 17, and a spacer 18 for adjusting the distance between disks (not shown) are integrated by glass solder bonding or aluminum bonding. They are integrally joined by the above-mentioned joining method. Moreover, the carriage assembly structure 13 is made entirely or partially of a ceramic material. A head support member 19 for supporting a read/write head (not shown) is attached to the tip of the guide arms 16 and 17, but it is possible to omit this head support member 19 and directly attach the head. You may also do so. With this configuration, it is possible to manufacture a structure that is lighter, has higher rigidity, and lower vibration than the conventional carriage assembly structure 8 (Fig. 2), which greatly improves high-speed and high-precision access performance. be able to.

上記したように部分的または全体的にセラミックス化し
たキャリジアセンブリ構造体１３をアルミ製磁気ディス
クと組合せて用いる場合には、材質の線膨張率の違いに
より、両者の熱変形に差異（６） を生じてヘッドが所定トラックからずれる不具合を発生
する恐れがある。When the carriage assembly structure 13 partially or entirely made of ceramic is used in combination with an aluminum magnetic disk as described above, there will be a difference in thermal deformation between the two (6) due to the difference in the coefficient of linear expansion of the materials. This may cause a problem in which the head deviates from a predetermined track.

この不具合を防止する手段として、第５図のヘッド支持
部材１９を磁気ディスクと同材質のアルミ材で構成すれ
ばよい。この場合、ヘッド支持部材１９を二つのヘッド
開戦距離に相当する長さ部分を有するように設定し、セ
ラミクス化されたガイドアーム１６と狭い部分で結合さ
せるようにすればよい。このようにガイドアーム１６を
構成すれば、第２図に示す従来のガイドアーム８に比べ
て小形化および軽量化をはかることができる。As a means to prevent this problem, the head support member 19 shown in FIG. 5 may be made of aluminum, which is the same material as the magnetic disk. In this case, the head support member 19 may be set to have a length corresponding to the opening distance of the two heads, and may be coupled to the guide arm 16 made of ceramic at a narrow portion. By configuring the guide arm 16 in this way, it can be made smaller and lighter than the conventional guide arm 8 shown in FIG.

上記キャリジアセンブリ構造体が例えばアルミ合金製の
場合には、アクセス方向の曲げ共振点の上限は約２．４
　ＫＨｚ程度である。そこで、さらに曲げ共振点を高め
るために、本実施例は振動特性を支配する縦弾性係数Ｅ
と密度ρとの比、すなわちＥ／ρがアルミ材に対して約
３．５倍を有するセラミック材の材料特性を適用したも
のである。If the carriage assembly structure is made of aluminum alloy, for example, the upper limit of the bending resonance point in the access direction is approximately 2.4
It is about KHz. Therefore, in order to further increase the bending resonance point, this embodiment
This applies the material properties of a ceramic material in which the ratio of E/ρ to density ρ, that is, E/ρ, is about 3.5 times that of aluminum material.

本実施例の振動特性は第３図の実線Ｃに示すとおりで、
破線りで示す従来例よりも高剛性化されて（７） いることが明らかである。また本実施例の開ループ特性
は第４図の実線Ｅに示すとおりで、アクセス方向の曲げ
共振点が約３．１ＫＨｚに移動し、ゲイン余裕も大きい
ことが明らかである。The vibration characteristics of this example are as shown by the solid line C in Figure 3.
It is clear that the rigidity is higher than the conventional example (7) shown by the broken line. Further, the open loop characteristics of this embodiment are as shown by the solid line E in FIG. 4, and it is clear that the bending resonance point in the access direction has moved to about 3.1 KHz and the gain margin is large.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、キャリジアセンブ
リ構成体およびスピンドルに剛性／質量の大きいセラミ
クス材を用いることにより、軽量化、高剛性化および低
振動化をはかり、高速高精度にアクセス性能を向上させ
ることができる。As explained above, according to the present invention, by using a ceramic material with high rigidity/mass for the carriage assembly structure and the spindle, weight reduction, high rigidity, and low vibration are achieved, and access performance is achieved at high speed and high precision. can be improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はスウィングアーム方式の磁気ディスク装置の典
型例を示す外観斜視図、第２図は前記磁気ディスク装置
に用いられる従来のキャリジアセンブリ構造体の一例を
示す斜視図、第３図および第４図はキャリジアセンブリ
構造体の振動特性および開ループ特性を示す説明図、第
５図および第６図は本発明のスウィングアーム方式磁気
ディスク装置に用いられるキャリジアセンブリ構造体の
一実施例を示す斜視図および正面図である。 （８） １・・・ベース、２・・・磁気ディスク、３・・・キャ
リジブロック、７・・・ピボット軸、１２・・・ボイス
コイル、１３・・・キャリジアセンブリ構造体、１５・
・・キャリジ本体、１６・・・ガイドアーム、１９・・
・ヘッド支持部材。 （９）FIG. 1 is an external perspective view showing a typical example of a swing arm type magnetic disk device, FIG. 2 is a perspective view showing an example of a conventional carriage assembly structure used in the magnetic disk device, and FIGS. The figure is an explanatory diagram showing the vibration characteristics and open loop characteristics of the carriage assembly structure, and FIGS. 5 and 6 are perspective views showing one embodiment of the carriage assembly structure used in the swing arm type magnetic disk device of the present invention. and a front view. (8) 1... Base, 2... Magnetic disk, 3... Carriage block, 7... Pivot shaft, 12... Voice coil, 13... Carriage assembly structure, 15...
... Carriage body, 16... Guide arm, 19...
・Head support member. (9)

Claims (1)

【特許請求の範囲】 １、回転する磁気ディスクと、ベース上に固定されたキ
ャリジブロックと、このキャリジブロック枢着されたピ
ボット軸を中心として回転されるキャリジ本体、このキ
ャリジ本体と一体化された読出し／書込みガイドアーム
、サーボガイドアーム、ヘッド支持部材およびボイスコ
イルを具えるキャリジアセンブリ構造体とからなるスウ
ィングアーム方式磁気ディスク装置において、前記キャ
リジアセンブリ構造体の全部または一部およびピボット
軸をセラミクスで形成したことを特徴とするスウィング
アーム方式磁気ディスク装置。 ２、上記キャリジ本体とボイスコイル枠体およびガイド
アーム群とを、またはキャリジ本体とガイドアーム群と
をそれぞれ一体化したことを特徴とする特許請求の範囲
第１項記載のスウイ（１） ングアーへ方式磁気ディスク装置。 ３、上記キャリジ本体およびガイドアームを一体化して
セラミック板に成形し、これらのセラミック板を積層す
ると共に結合してキャリジアセンブリ構造体を構成した
ことを特徴とする特許請求の範囲第１項または第２項記
載のスウィングアーム方式磁気ディスク装置。 ４、上記ヘッド支持部材を磁気ディスク基盤材と同一材
で成形したことを特徴とする特許請求の範囲第１項ない
し第３項のうちの任意の一項記載のスウィングアーム方
式磁気ディスク装置。[Claims] 1. A rotating magnetic disk, a carriage block fixed on a base, a carriage body that rotates around a pivot shaft to which the carriage block is pivoted, and a carriage unit that is integrated with the carriage body. In a swing arm type magnetic disk drive comprising a carriage assembly structure including a read/write guide arm, a servo guide arm, a head support member, and a voice coil, all or part of the carriage assembly structure and the pivot shaft are made of ceramics. A swing arm type magnetic disk device characterized by the following structure. 2. The switch (1) according to claim 1, characterized in that the carriage main body, the voice coil frame body and the guide arm group are integrated, or the carriage main body and the guide arm group are respectively integrated. method magnetic disk device. 3. The carriage body and the guide arm are integrally formed into a ceramic plate, and these ceramic plates are laminated and bonded to form a carriage assembly structure. The swing arm type magnetic disk device according to item 2. 4. A swing arm type magnetic disk device according to any one of claims 1 to 3, wherein the head support member is molded from the same material as the magnetic disk base material.
JP22415283A 1983-11-30 1983-11-30 Magnetic disc device of swing arm system Pending JPS60117457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22415283A JPS60117457A (en) 1983-11-30 1983-11-30 Magnetic disc device of swing arm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22415283A JPS60117457A (en) 1983-11-30 1983-11-30 Magnetic disc device of swing arm system

Publications (1)

Publication Number Publication Date
JPS60117457A true JPS60117457A (en) 1985-06-24

Family

ID=16809349

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22415283A Pending JPS60117457A (en) 1983-11-30 1983-11-30 Magnetic disc device of swing arm system

Country Status (1)

Country Link
JP (1) JPS60117457A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678417A1 (en) * 1991-06-14 1992-12-31 Marconi Electronic Devices MOUNTING DEVICE FOR MAGNETIC DISC READING HEAD.
US6618226B2 (en) 2001-07-10 2003-09-09 International Business Machines Corporation Locally deformable sleeve on disk drive pivot assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58199468A (en) * 1982-05-14 1983-11-19 Pioneer Electronic Corp Pickup driving device of recording information reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58199468A (en) * 1982-05-14 1983-11-19 Pioneer Electronic Corp Pickup driving device of recording information reproducing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678417A1 (en) * 1991-06-14 1992-12-31 Marconi Electronic Devices MOUNTING DEVICE FOR MAGNETIC DISC READING HEAD.
US6618226B2 (en) 2001-07-10 2003-09-09 International Business Machines Corporation Locally deformable sleeve on disk drive pivot assembly

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