JPS6236774A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS6236774A
JPS6236774A JP17399785A JP17399785A JPS6236774A JP S6236774 A JPS6236774 A JP S6236774A JP 17399785 A JP17399785 A JP 17399785A JP 17399785 A JP17399785 A JP 17399785A JP S6236774 A JPS6236774 A JP S6236774A
Authority
JP
Japan
Prior art keywords
magnetic disk
spindle
spacer
projections
magnetic
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
JP17399785A
Other languages
Japanese (ja)
Inventor
Akira Sasaki
彰 佐々木
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP17399785A priority Critical patent/JPS6236774A/en
Publication of JPS6236774A publication Critical patent/JPS6236774A/en
Pending legal-status Critical Current

Links

Landscapes

  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

PURPOSE:To reduce the degree of bending of a magnetic disk produced during its revolution and to set the stable floating gap of a magnetic head slider, by providing plural projection parts to either one among the magnetic disk contact surface of a fastener, the magnetic disk attachment surface of a spindle or the magnetic disk contact surface of a spacer. CONSTITUTION:The projection parts 12 and 13 are provided to the magnetic disk attachment surface 4 of a spindle 3 and a fastener 10 respectively. A magnetic disk 1 is supported by those projections 12 and 13. Here the number of projections 12 of the surface 4 are equal to the projections 13 of the fastener 10. While plural projections 14 are provided on both sides of the contact surface of a spacer 5 with the disk 11. When plural disks 1 are attached to the spindle 3 via plural spacers 5, the projections 14 of the spacer 5 are distributed so that they have approximately the same phase against the shaft direction of spindle motor 2. Then both projections 12 and 13 are also distributed to have approximately the same phase.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、円板状の記録媒体をスピンドルに取付けて回
転駆動させる磁気ディスク装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic disk device in which a disk-shaped recording medium is attached to a spindle and driven to rotate.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

最近、動圧気体軸受として作用するスライダ軸・受を有
した磁気ヘッドが、記録媒体に対向して安定に微小すき
まを保ち記録再生を行なう磁気ディスク装置は小型化の
要求が非常に多く、これに伴い磁気記録媒体(以下磁気
ディスクと称す)も小径化、薄形化が行なわれている。
Recently, there has been a strong demand for miniaturization of magnetic disk drives, in which a magnetic head with a slider shaft and bearing that acts as a hydrodynamic gas bearing faces the recording medium and stably maintains a small gap for recording and reproduction. Along with this, magnetic recording media (hereinafter referred to as magnetic disks) are also becoming smaller in diameter and thinner.

一方、記憶容量は装置小型化にもかかわらず大容量が望
まれ、記録密度(ピット密度及びトラック密度)向上に
多大な努力がなされている。大容量化の他の有効な手段
件しては、装置当たりの磁気ディスク枚数を増加させる
ことであり、磁気ディスクの間隔を狭めること、磁気デ
ィスク厚を薄くすることが行なわれている。
On the other hand, a large storage capacity is desired despite the miniaturization of devices, and great efforts are being made to improve recording density (pit density and track density). Other effective means for increasing capacity include increasing the number of magnetic disks per device, narrowing the spacing between the magnetic disks, and reducing the thickness of the magnetic disks.

従来、磁気ディスク厚は回転による遠心力による変形が
記録再生に悪影響をおよほさないことのみを考慮し、小
径化に伴い薄形化が行なわれているが以下のような問題
点が生じる。
Conventionally, the thickness of a magnetic disk has been reduced as the diameter has been reduced, taking into consideration that deformation due to centrifugal force due to rotation does not adversely affect recording and reproduction, but the following problems arise.

すなわち、第5図に示すように磁気ディスクlを重ねて
装着するとき、スピンドル3のF11気ディスク取付面
4のうねり、スペーサ5の厚み年増−及び磁気ディスク
取付面4、スペーサ5の磁気ディスク接触面6の傷、付
着物等により、磁気ディスクlが撓まされる。
That is, when the magnetic disks 1 are stacked and mounted as shown in FIG. The magnetic disk 1 is bent due to scratches, deposits, etc. on the contact surface 6.

このときの撓み方は磁気ディスクの厚みにより異なり、
磁気ディスクが薄いほど周方向の撓みの曲率は大きい。
The way it bends at this time varies depending on the thickness of the magnetic disk.
The thinner the magnetic disk, the greater the curvature of circumferential deflection.

また、この曲率が磁気ディスク上を浮上する磁気へラド
スライダ7の動的浮上量変動と密接な関わりがある場合
、磁気ヘッドスライダ7の平面部の長さをlとすると、
磁気ディスクと磁気ヘッドρ スライダとの間に形成される空気膜はS (=r /8
?)気へラドスライダ7は空気膜と平均化するような浮
上姿勢をとるため、逆に通常、記録書生ファ8のギャッ
プ9があるスライダ後端はうねりにより磁気ディスク1
に近づいたり離れたりすることになる。定常回転時、上
記の現象は信号出力の変化、いわゆるモジュレーション
として現われ、信号の悟順性低下をもたらす。
Furthermore, if this curvature is closely related to the dynamic flying height fluctuation of the magnetic head slider 7 flying above the magnetic disk, then if the length of the flat part of the magnetic head slider 7 is l, then
The air film formed between the magnetic disk and the magnetic head ρ slider is S (= r /8
? ) Since the air rad slider 7 assumes a flying attitude that is equalized with the air film, the rear end of the slider where the gap 9 of the recording fan 8 is normally caused by the undulations of the magnetic disk 1.
You will get closer to or move away from. During steady rotation, the above phenomenon appears as a change in the signal output, so-called modulation, resulting in a decrease in signal compliance.

また、磁シーディスク回転停止時、高い周込まで磁気へ
ラドスライダと磁気ディスクとの接触及び衝突が生じ、
磁気へラドスライダと磁気ディスクの寿命は極端に低下
する。
In addition, when the magnetic disk rotation stops, contact and collision between the magnetic disk slider and the magnetic disk occur due to high circumference.
The lifespan of the magnetic herad slider and magnetic disk will be extremely shortened.

〔発明の目的〕[Purpose of the invention]

本発明は、上記事情に麩みてなされたもので、回転中に
生じる磁気ディスクの齢みを低減させて、磁気へラドス
ライダの浮上すきまを安定に設定できる磁気ディスク製
型を提供することを目的とする。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a magnetic disk manufacturing mold that can reduce the age of the magnetic disk that occurs during rotation and stably set the flying clearance of a magnetic helide slider. do.

〔発明の概要〕[Summary of the invention]

上記目的を速成するために本発明においては、磁気ディ
スクをスペーサを介して締結具でスピンドルに固定し、
所定の軸線周りに回転駆動させる磁気ディスク装置にお
いて、私g結只の沼気ディスク接触面、スピンドルの磁
気ディスク取付面、スペーサの磁気ディスク接触面のう
ち少なくともどれか一面に複数の突起部を設け、この突
起部で磁気ディスクを支持固定することを特徴とする磁
気ディスク装置を提供する。
In order to quickly achieve the above object, the present invention fixes a magnetic disk to a spindle with a fastener via a spacer,
In a magnetic disk drive that is driven to rotate around a predetermined axis, a plurality of protrusions are provided on at least one of the magnetic disk contact surface of the private unit, the magnetic disk mounting surface of the spindle, and the magnetic disk contact surface of the spacer. , provides a magnetic disk device characterized in that a magnetic disk is supported and fixed by the protrusion.

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

以下図面を参照して本発明の実施例について説明する。 Embodiments of the present invention will be described below with reference to the drawings.

第1図は磁気ディスクlをスピンドル3に装着したとき
の一部断面にした側面(8)である。第1図において、
スピンドルモータ2によって回転駆動されるスピンドル
3に磁気ディスクlは締結具10によって装着されてい
る。スピンドル3の磁気ディスク取付面4および締結具
10には各々突起部12゜13が設けられており、磁気
ディスク1はこの突起部12.13によって支持されて
いる。なお、スピンドル3の磁気ディスク取付面4に設
けられる突起部12と締結具10に設けられる突起部1
3は各々同数で複数個設けられている。そして、突起部
12と突起部13は、スピンドルモータ2の軸方向に対
して略同−位相(a1気ディスク1の上下面の略対応す
る位置)にあり、磁気ディスク1を突起部12と突起部
13で挟んで支持固定している。
FIG. 1 shows a partially sectional side view (8) of the magnetic disk l mounted on the spindle 3. In Figure 1,
A magnetic disk 1 is attached to a spindle 3 which is rotationally driven by a spindle motor 2 using a fastener 10 . The magnetic disk mounting surface 4 of the spindle 3 and the fastener 10 are each provided with projections 12.13, and the magnetic disk 1 is supported by these projections 12.13. Note that the protrusion 12 provided on the magnetic disk mounting surface 4 of the spindle 3 and the protrusion 1 provided on the fastener 10
A plurality of 3 are provided in the same number. The protrusion 12 and the protrusion 13 are in substantially the same phase with respect to the axial direction of the spindle motor 2 (approximately corresponding positions on the upper and lower surfaces of the a1 disk 1), and the magnetic disk 1 is aligned with the protrusion 12. It is supported and fixed by being sandwiched between portions 13.

第2図は、磁気ディスクlをスピンドル3に複数枚装着
したときの一部断面にした側面図である。
FIG. 2 is a partially sectional side view of a plurality of magnetic disks l mounted on the spindle 3.

複数枚の磁気ディスクlは、スペーサ5を介してスピン
ドル3に積み重ねられている。
A plurality of magnetic disks 1 are stacked on a spindle 3 with spacers 5 in between.

スペーサ5の磁気ディスク1との接触面の両面にル3に
装置する場合、スペーサ5の突起部14は、スピンドル
モータ2の軸方向に対して各々略同−位相になるように
配置し、突起部12及び突起部13とも略同−位相にな
るように配置する。
When the spacer 5 is mounted on both sides of the contact surface with the magnetic disk 1, the protrusions 14 of the spacer 5 are arranged so that they are in substantially the same phase with respect to the axial direction of the spindle motor 2, and the protrusions The portion 12 and the protruding portion 13 are arranged so as to have substantially the same phase.

第3図はスペーサ5の形状を示す上面図である。FIG. 3 is a top view showing the shape of the spacer 5. FIG.

第3図においては、スペーサ5の磁気ディスクlの接触
面の円周上に3つの突起部14が設けられている。突起
部14はスペーサ5の円周面上で略等配、(3つの場合
は1200間隔)で設けられている。
In FIG. 3, three projections 14 are provided on the circumference of the contact surface of the spacer 5 with the magnetic disk l. The protrusions 14 are provided at approximately equal intervals on the circumferential surface of the spacer 5 (in the case of three, at 1200 intervals).

また、スペーサ5には各々の突起部12.13.14の
位相が回転中にすれないように、スピンドル3への位置
決め手段として、スピンドル3への取付面に突起15を
設け、これに対応するスピンドル3の周囲に設けた切欠
(図示省略)に突起15を係合させている。この突起1
5を設けたことによって、磁気ディスク1が回転中にも
、突起部12.13.14の位相がずれることなく、安
定して磁気ディスクl全支持ト1定することができる。
Further, the spacer 5 is provided with a protrusion 15 on the mounting surface to the spindle 3 as a positioning means to the spindle 3 so that the phases of the respective protrusions 12, 13, 14 do not shift during rotation. A protrusion 15 is engaged with a notch (not shown) provided around the spindle 3. This protrusion 1
5, even when the magnetic disk 1 is rotating, the phases of the protrusions 12, 13, and 14 do not shift, and the entire magnetic disk 1 can be stably supported.

次に、第4図はスペーサ5に設ける突起部14の形状の
変形例を示すためのスペーサ5の断面図である。
Next, FIG. 4 is a sectional view of the spacer 5 to show a modification of the shape of the protrusion 14 provided on the spacer 5. As shown in FIG.

第4図ρ(a)は突起部14の形状が球面、同じ<(b
)は円錐、(C月ま円錐台、(d)は円筒形状である。
In Fig. 4 ρ(a), the shape of the protrusion 14 is spherical, the same <(b
) is a cone, (C is a truncated cone, and (d) is a cylindrical shape.

なお、突起部12.13も同様の形状とすることができ
る。
Note that the protrusions 12.13 can also have a similar shape.

第5図は、スペーサ5にトける突起部14の数を”示す
ものであり、第51n(a)は突起!、S14が4つ、
第5図(b)は突起部14が6つ設けられたものである
が、突起部14の数は、必要に応じて2つ以上任意に定
めることができる。なお、突起部22.13の個数も同
様に任意に決定できる。
FIG. 5 shows the number of protrusions 14 on the spacer 5, 51n(a) is protrusion!, S14 is 4,
Although six protrusions 14 are provided in FIG. 5(b), the number of protrusions 14 can be arbitrarily set to two or more as required. Note that the number of protrusions 22.13 can be similarly determined arbitrarily.

また、スペーサ5とスピンドル3の位置決め手段として
は、スピンドル3に突起を設け、これに係合する切次を
スペーサ5及び磁気ディスク1に設けてもよい。
Further, as a means for positioning the spacer 5 and the spindle 3, a protrusion may be provided on the spindle 3, and a notch that engages with the protrusion may be provided on the spacer 5 and the magnetic disk 1.

以上のように構成された磁気ディスク装置においては、
磁気ディスク1を固定するとき、磁気ディスクlとスピ
ンドル3の磁気ディスク取付面4、スペーサ5の磁気デ
ィスク接触面6及び締結具10そのため、磁気ディスク
lの撓みの原因となるスピンドル3の磁気ディスク取付
面4の不整、スペーサ5の厚み不均一、スペーサ5のデ
ィスク接触面6の不整の影響が減少し、磁気ディスク1
の撓みの曲率は小さくなる。したがって、磁気へラドス
ライダ7の浮上すきま変動は小さくなり、磁気ディスク
回転停止時の磁気ディスクlと磁気ヘッドスライダ7の
接触が生じる周速が小さくなり、1回のfB気ディスク
回転停止における磁気へラドスライダ7の摺動距離が短
かくなる。また、高い周速における摺動が回避できるた
め、磁気ディスク1及び磁気ヘッドスライダ7の#館を
艮<シ、磁気ヘッドスライダ7の浮上すきまitの微小
化とともに磁気ディスク装置の信頼性は著しく向上する
In the magnetic disk device configured as above,
When fixing the magnetic disk 1, the magnetic disk 1 and the magnetic disk mounting surface 4 of the spindle 3, the magnetic disk contact surface 6 of the spacer 5, and the fastener 10 are attached to the magnetic disk 1, which causes the magnetic disk 1 to bend. The effects of unevenness of the surface 4, unevenness of the thickness of the spacer 5, and unevenness of the disk contact surface 6 of the spacer 5 are reduced, and the magnetic disk 1
The curvature of the deflection becomes smaller. Therefore, the variation in the flying clearance of the magnetic helad slider 7 becomes small, the circumferential speed at which the magnetic disk l and the magnetic head slider 7 come into contact when the magnetic disk stops rotating becomes small, and the magnetic helad slider 7 when the magnetic disk stops rotating becomes smaller. 7. The sliding distance becomes shorter. In addition, since sliding at high circumferential speeds can be avoided, the reliability of the magnetic disk device is significantly improved as the flying clearance of the magnetic head slider 7 is made smaller. do.

〔発明の効果〕〔Effect of the invention〕

以上詳述してきたように本発明によれば、突起部で磁気
ディスクを支持固定するようにしたため、磁気ディスク
と支持部の接触面接が減少し、磁気ディスクの撓みの曲
率が小さくなり、磁気へラドスライダの浮上すきまを安
定に保つことができる。
As described in detail above, according to the present invention, since the magnetic disk is supported and fixed by the protrusion, the contact surface between the magnetic disk and the support portion is reduced, the curvature of the magnetic disk is reduced, and the magnetic disk is The flying clearance of the RAD slider can be kept stable.

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

第1図は、本発明に係る磁気ディスク装置に1枚の磁気
ディスクを組込だときの部分断面側面図、第2図は、本
発明に係る磁気ディスク装置に複数枚の磁気ディスクを
組込んだときの部分断面側面図、第3図は、本発明に係
るスペーサの平面図、第4図は、本発明に係るスペーサ
の変形例を示し、第3図のA−A面の断面図、第5図は
、本発明に係るスペーサの変形例を示す平面図、第6図
は、従来の磁気ディスク装置の部分断固側面図、第7図
は、磁気ディスク局方問うねりの磁気へラドスライダの
浮上状態への影参を説明する説明図である。 l・・・磁気ディスク(磁気記録媒体)3・・・スピン
ドル 5・・・スペーサ 10・・・締結具 12、13.14・・・突起部 代理人 弁理士 則 近 憲 佑 同    竹 花 喜久男 第  1 図 第  2 図 (b)
FIG. 1 is a partially sectional side view of a magnetic disk device according to the present invention incorporating one magnetic disk, and FIG. 2 is a magnetic disk device according to the present invention incorporating a plurality of magnetic disks. 3 is a plan view of the spacer according to the present invention, FIG. 4 shows a modified example of the spacer according to the present invention, and a sectional view taken along the line A-A in FIG. FIG. 5 is a plan view showing a modified example of the spacer according to the present invention, FIG. 6 is a partially cutaway side view of a conventional magnetic disk device, and FIG. It is an explanatory view explaining shadow reference to a floating state. l...Magnetic disk (magnetic recording medium) 3...Spindle 5...Spacer 10...Fasteners 12, 13.14...Protrusion agent Patent attorney Nori Chika Ken Yudo Kikuo Takehana 1 Figure 2 (b)

Claims (1)

【特許請求の範囲】[Claims] 磁気ディスクをスペーサを介して締結具でスピンドルに
固定し、所定の軸線周りに回転駆動させる磁気ディスク
装置において、前記スペーサの前記磁気ディスクとの接
触面若しくは、前記締結具の前記磁気ディスクとの接触
面若しくは、前記スピンドルの前記磁気ディスク取付面
の少なくとも一面に複数の突起部を設けたことを特徴と
する磁気ディスク装置。
In a magnetic disk device in which a magnetic disk is fixed to a spindle with a fastener via a spacer and driven to rotate around a predetermined axis, a contact surface of the spacer with the magnetic disk or a contact surface of the fastener with the magnetic disk. A magnetic disk drive characterized in that a plurality of protrusions are provided on at least one surface of the magnetic disk mounting surface of the spindle.
JP17399785A 1985-08-09 1985-08-09 Magnetic disk device Pending JPS6236774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17399785A JPS6236774A (en) 1985-08-09 1985-08-09 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17399785A JPS6236774A (en) 1985-08-09 1985-08-09 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS6236774A true JPS6236774A (en) 1987-02-17

Family

ID=15970842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17399785A Pending JPS6236774A (en) 1985-08-09 1985-08-09 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS6236774A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0684257A (en) * 1992-07-03 1994-03-25 Teac Corp Disk clamp mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0684257A (en) * 1992-07-03 1994-03-25 Teac Corp Disk clamp mechanism

Similar Documents

Publication Publication Date Title
US4754351A (en) Method and apparatus for controlling radial disk displacement in Winchester disk drives
US6356409B1 (en) Balancing apparatus and method for high speed hard disk drive spindles
JP3240935B2 (en) Magnetic disk drive
US6172844B1 (en) Double grooved spacer for a disc drive
US5504638A (en) Device for driving disk-type storage medium with improved clamp and hub arrangement
JPH09503331A (en) High wall disc clamp
US6226146B1 (en) Multi-point interference disc spacer for a disc drive
US6282054B1 (en) Teeth lock ring for a disc stack
EP0441557B1 (en) Rotating support apparatus in disk storage device
JP2002133743A (en) Disk clamp for information recording disk device and information recording disk device
JPH04505379A (en) A disk file having means for ensuring concentricity between the disk and the hub.
US5896242A (en) Spindle motor with stress alleviating groove provided in hub cylindrical protrusion portion
JPH03150778A (en) Disk device
US20020034041A1 (en) Disc stack clamping with radially offset clamping surfaces
JPS6236774A (en) Magnetic disk device
US6201661B1 (en) Disc slip preventing spacer ring apparatus and method of use
JPH04184758A (en) Driving arrangement for disk
JP2753154B2 (en) Magnetic disk drive
JPH0628650A (en) Magnetic disk device
JPH01264679A (en) Spindle motor for rotating magnetic disk
JPS59227077A (en) Magnetic disk device
JPH076469A (en) Magnetic disk device
JPH04325979A (en) Disk and magnetic disk device
JPH0668462A (en) Magnetic disk
JPH02263370A (en) Hard disk driving device