JPH09223346A - Data recorder - Google Patents

Data recorder

Info

Publication number
JPH09223346A
JPH09223346A JP2909396A JP2909396A JPH09223346A JP H09223346 A JPH09223346 A JP H09223346A JP 2909396 A JP2909396 A JP 2909396A JP 2909396 A JP2909396 A JP 2909396A JP H09223346 A JPH09223346 A JP H09223346A
Authority
JP
Japan
Prior art keywords
disk
center
pressing member
disc
hub
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
JP2909396A
Other languages
Japanese (ja)
Inventor
Shigeru Hoshina
茂 保科
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 JP2909396A priority Critical patent/JPH09223346A/en
Publication of JPH09223346A publication Critical patent/JPH09223346A/en
Pending legal-status Critical Current

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

Abstract

PROBLEM TO BE SOLVED: To provide a data recorder capable of minimizing the deformation of a disk caused by a fixing mechanism to fix the disk to a rotating member. SOLUTION: The disk 21 which is a recording medium, is held between a spindle motor hub 23 and a disk retainer 25, then the disk 21 is fixed to the spindle motor hub 23 by fastening the disk retainer 25 with plural clamp screws against the spindle motor hub 23. The disk retainer 25 is provided with four holes 31 for putting the clamp screws through them at positions distant by radius R1 from the center of this disk retainer 25 keeping equal spaces in the peripheral direction, and also provided with respectively independent oblong holes 32 at positions distant by radius R2 (where R2>R1) from the center of the disk retainer 25 and peripherally symmetrical taking the positions where the holes 31 are arranged, as the borders.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、磁気デイスク装量
(HDD)等のデータ記録装量に係り、特にディスクを
回転部材に固定する構造を改良したデータ記録装置に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording capacity such as a magnetic disk capacity (HDD), and more particularly to a data recording apparatus having an improved structure for fixing a disk to a rotating member.

【0002】[0002]

【従来の技術】周知のように、最近では磁気デイスク装
量の小型化、大容量化の要望がますます高まっている。
このような要望を実現する1つの手段として、たとえば
ディスク径が 2.5インチ以下の小型装置では、磁気ヘッ
ドとデイスクとのスペーシングを小さくすることによっ
て周方向の記録密度を高めることが考えられている。
2. Description of the Related Art As is well known, in recent years, there has been an increasing demand for miniaturization of magnetic disks and a large capacity.
As one means for realizing such a demand, for example, in a small-sized device having a disk diameter of 2.5 inches or less, it is considered to increase the recording density in the circumferential direction by reducing the spacing between the magnetic head and the disk. .

【0003】ところで、スペーシングを微小化すること
によって小型化、大容量化を実現する場合、特に問題と
なるのはディスクをスピンドルモータに固定(クラン
プ)する際に生じるデイスクの変形である。デイスクの
変形は、磁気へッドとデイスクとのスペーシングの変動
として現れ、スペーシングが小さければ小さいほど変動
が顕著となる。このスペーシングの変動は、信号の記録
・再生における信頼性を低下させる。
In the meantime, when miniaturizing the spacing to realize the miniaturization and the large capacity, a particular problem is the deformation of the disk that occurs when the disk is fixed (clamped) to the spindle motor. The deformation of the disk appears as a variation in the spacing between the magnetic head and the disk, and the smaller the spacing, the more pronounced the variation. This variation in spacing reduces the reliability of signal recording / reproduction.

【0004】図7には従来のクランプ方式を採用したデ
ータ記録装置、ここには磁気ディスク装置(HDD)の
分解斜視図が示されている。図中、1はデータの記録・
再生に供される記録媒体としてのディスクを示してい
る。このディスク1は、たとえばガラスと磁性層とから
なる部材で円環板状に形成されており、スピンドルモー
タ2のハブ3に設けられたフランジ部4とばね性を有す
る円環状のディスク押え部材5とで挟まれ、この状態で
ディスク押え部材5が図示しない締付けネジでハブ3に
締付けられることによってハブ3に固定されている。な
お、ディスク押え部材5の周縁部には、ディスク1側に
突出して該ディスク1を直接押圧する突出部6が一周に
亘って形成されている。また、ディスク押え部材5に
は、締付けネジを通すための穴7が周方向に等間隔に4
個設けられている。さらに、穴7に対応させてハブ3の
端面側にも周方向に等間隔に4個のネジ穴8が形成され
ている。
FIG. 7 shows an exploded perspective view of a conventional data recording apparatus employing a clamp system, here a magnetic disk device (HDD). In the figure, 1 is data recording
A disk as a recording medium used for reproduction is shown. The disk 1 is formed of, for example, a member made of glass and a magnetic layer in an annular plate shape, and has a flange portion 4 provided on the hub 3 of the spindle motor 2 and an annular disk pressing member 5 having a spring property. The disk pressing member 5 is fixed to the hub 3 by being tightened to the hub 3 with a tightening screw (not shown) in this state. It should be noted that the peripheral portion of the disc pressing member 5 is formed with a projecting portion 6 that projects toward the disc 1 and directly presses the disc 1 over the entire circumference. Further, the disk pressing member 5 is provided with holes 7 through which tightening screws are inserted at equal intervals in the circumferential direction.
It is provided individually. Further, four screw holes 8 are formed on the end face side of the hub 3 at equal intervals in the circumferential direction so as to correspond to the holes 7.

【0005】このようなクランプ方式を採用した従来の
HDDでは、ディスク押え部材5を介してディスク1に
周方向に不均一な押圧力が加わり、図8中に2点鎖線で
示すようにディスク1の周方向に締付けネジの数に相当
した凹凸を持つような変形が起こる。このような変形
は、局所的にみると磁気へッドの下のディスク表面が曲
率を持つことになり、図9に示すように浮上すきまの変
動を引き起こし、信号の記録および再生レベルの変動を
招く。
In the conventional HDD adopting such a clamp system, a non-uniform pressing force is applied to the disk 1 through the disk pressing member 5 in the circumferential direction, so that the disk 1 is indicated by a chain double-dashed line in FIG. Deformation occurs that has irregularities corresponding to the number of tightening screws in the circumferential direction. Such deformation causes the disk surface under the magnetic head to have a curvature when viewed locally, causing fluctuations in the floating clearance as shown in FIG. 9, which causes fluctuations in signal recording and reproduction levels. Invite.

【0006】図9はディスクの変形による浮上すきまの
変動を模式的に示すものである。この図9から判るよう
に、磁気ヘッド下のディスクの変形は、磁気ギャップの
位置でのデイスクとのすきまの変動を引き起こす。この
場合、ディスク全体の変形量よりも、磁気ヘッド下のデ
イスクの曲率の影響が極めて大きい。図10には図7に
示すクランプ方式を採用した構造で、デイスク1周の曲
率の変化を表面粗さ計で測定した結果が示されている。
FIG. 9 schematically shows the fluctuation of the floating clearance due to the deformation of the disk. As can be seen from FIG. 9, the deformation of the disk under the magnetic head causes a change in the clearance with the disk at the position of the magnetic gap. In this case, the influence of the curvature of the disk under the magnetic head is much larger than the amount of deformation of the entire disk. FIG. 10 shows the result of measuring the change in the curvature of one circumference of the disk with a surface roughness meter with the structure adopting the clamp method shown in FIG.

【0007】このように、従来のデータ記録装置にあっ
ては、ディスクを回転部材に固定する構造の影響を受け
てディスクの変形が大きく、これが原因してスペーシン
グを小さくすることが困難であった。
As described above, in the conventional data recording apparatus, the disk is largely deformed due to the influence of the structure for fixing the disk to the rotating member, which makes it difficult to reduce the spacing. It was

【0008】一方、図11に示すようにディスク押え部
材5aにおける穴7の外側に長穴9を設ける構造が考え
られている。この構造について構造解析プログラムΑB
AQUSでシミュレーシヨンを行ったところ、図12に
示すように、変形の絶対量は図7に示したディスク押え
部材5を用いた場合よりも多少減少するものの、磁気ヘ
ッドの浮上すきまに影響を与える曲率はかえって上昇し
てしまう結果が得られた。
On the other hand, as shown in FIG. 11, a structure in which an elongated hole 9 is provided outside the hole 7 in the disc pressing member 5a is considered. About this structure Structural analysis program ΑB
When the simulation is performed by AQUS, as shown in FIG. 12, although the absolute amount of deformation is slightly reduced as compared with the case where the disk pressing member 5 shown in FIG. 7 is used, it affects the floating clearance of the magnetic head. The result is that the curvature rather rises.

【0009】また、図13に示すように、円板状のディ
スク押え部材5bと1本のネジ10とを使ってディスク
1をスピンドルモータ11のハブ12およびフランジ部
13に固定する構造が考えられている。なお、図中14
はスペーサを示している。
Further, as shown in FIG. 13, a structure is conceivable in which the disk 1 is fixed to the hub 12 and the flange portion 13 of the spindle motor 11 using a disk-shaped disk pressing member 5b and one screw 10. ing. In addition, 14 in the figure
Indicates a spacer.

【0010】このような構造を採用すると、ディスク1
に対して周方向に均一に力が加わるようになり、ディス
ク1の変形を低減できる。しかしながら、この構造で
は、スピンドルモータ11の軸をディスクドライブの匡
体に固定する際に、スピンドルモータ11の図中下端の
みで固定することになるので、スピンドルモータ11の
回転振れを増大させ、ディスク1に対する磁気へッドの
位置決めに対して悪影響を及ぼすことになる。
When such a structure is adopted, the disk 1
As a result, the force is evenly applied in the circumferential direction, and the deformation of the disk 1 can be reduced. However, in this structure, when the shaft of the spindle motor 11 is fixed to the casing of the disk drive, it is fixed only at the lower end of the spindle motor 11 in the figure, so that the rotational shake of the spindle motor 11 is increased and The positioning of the magnetic head with respect to 1 will be adversely affected.

【0011】[0011]

【発明が解決しようとする課題】上述の如く、ディスク
を組込んだ従来のデータ記録装置にあっては、ディスク
を回転部材に固定する固定機構に起因してデイスクの変
形を防ぐことができず、この変形が原因となってたとえ
ば磁気へッドの浮上量が変動して信号の記録および再生
レベルの変動を低減できないという間題があった。
As described above, in the conventional data recording apparatus incorporating the disk, the deformation of the disk cannot be prevented due to the fixing mechanism for fixing the disk to the rotating member. However, there has been a problem that due to this deformation, for example, the flying height of the magnetic head fluctuates and the fluctuation of the signal recording and reproducing levels cannot be reduced.

【0012】そこで本発明は、ディスクの変形を最小限
に抑えることができ、歩留りが良く、しかも信頼性の向
上、薄型化、大容量化の要望に応え得るデータ記録装置
を提供することを目的としている。
Therefore, it is an object of the present invention to provide a data recording apparatus which can minimize the deformation of a disk, has a high yield, and can meet the demands for improved reliability, thinness, and large capacity. I am trying.

【0013】[0013]

【課題を解決するための手段】上記目的を達成するため
に、本発明は、データの記録媒体であるディスクと、こ
のディスクを支持するハブと、このハブに対して前記デ
ィスクを押え付けるディスク押え部材とを備え、上記ハ
ブに対して上記ディスク押え部材を複数の締付けネジで
締め付けることによって上記ディスクを上記ハブに固定
する構造のデータ記録装置において、前記ディスク押え
部材は、該ディスク押え部材の中心から半径R1 の円周
上に前記締付けネジを通すための穴を周方向に等間隔に
複数個備えるとともに、上記ディスク押え部材の中心か
ら半径R2 (ただし、R2 >R1)の円周上でディスク
押え部材の中心と上記穴の中心とを結ぶ線を境とする周
方向対称位置にそれぞれ独立した開口部を備えている。
To achieve the above object, the present invention provides a disk as a data recording medium, a hub for supporting the disk, and a disk retainer for pressing the disk against the hub. A member for fixing the disk to the hub by tightening the disk pressing member to the hub with a plurality of tightening screws, wherein the disk pressing member is the center of the disk pressing member. From the center of the disc holding member to the disc with a radius R2 (where R2> R1) from the center of the disc holding member. Independent openings are provided at circumferentially symmetrical positions with respect to a line connecting the center of the pressing member and the center of the hole.

【0014】なお、前記開口部は、前記半径R2 の円周
上において占める割合が35%以上60%以下、好ましくは
ほぼ50%であることが望ましい。また、前記開口部は、
該開口部における周方向の中心と締付けネジを通すため
の前記穴の中心との間の周方向の開き角が22.5度に設定
されていることが好ましい。
It is desirable that the opening has a ratio of the radius R2 occupied on the circumference of 35% or more and 60% or less, preferably about 50%. Further, the opening is
It is preferable that the opening angle in the circumferential direction between the center of the opening in the circumferential direction and the center of the hole for passing the tightening screw is set to 22.5 degrees.

【0015】上記構成を採用すると、締付けネジによっ
て加えられる力を効率よく周方向に分散させてディスク
を回転部材にクランプすることができるので、デイスク
の変形を低減でき、この結果、たとえば磁気ヘッドの浮
上量変動による信号の記録および再生レベルのばらつき
を少なくでき、しかも歩留りの向上、信頼性の向上、薄
型化、大容量化の要望に応えることができる。
When the above-mentioned structure is adopted, the force applied by the tightening screw can be efficiently dispersed in the circumferential direction to clamp the disk on the rotating member, so that the deformation of the disk can be reduced, and as a result, for example, of the magnetic head. It is possible to reduce variations in recording and reproducing levels of signals due to fluctuations in the flying height, and it is possible to meet demands for improved yield, improved reliability, thinness, and large capacity.

【0016】[0016]

【発明の実施の形態】以下、図面を参照しながら発明の
実施形態を説明する。図1には本発明の一実施形態に係
るデータ記録装置、ここには本発明を適用した磁気ディ
スク装置(HDD)の分解斜視図が示されている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an exploded perspective view of a data recording device according to an embodiment of the present invention, here, a magnetic disk device (HDD) to which the present invention is applied.

【0017】図中、21はデータの記録・再生に供され
る記録媒体としてのディスクを示している。このディス
ク21は、薄いガラスと磁性層とからなる部材で円環板
状に形成されており、スピンドルモータ22のハブ23
に設けられたフランジ部24と円環状に形成されたディ
スク押え部材25とで挟まれ、この状態でディスク押え
部材25が図示しない締付けネジでハブ23に締付けら
れることによってハブ23に固定されている。
In the figure, reference numeral 21 indicates a disk as a recording medium used for recording / reproducing data. The disk 21 is formed of a member composed of thin glass and a magnetic layer and is formed into an annular plate shape, and has a hub 23 of a spindle motor 22.
It is sandwiched between a flange portion 24 provided on the above and a disc pressing member 25 formed in an annular shape, and in this state, the disc pressing member 25 is fixed to the hub 23 by being tightened to the hub 23 with a tightening screw (not shown). .

【0018】ディスク押え部材25は、樹脂による射出
成形や金属板にプレス加工等を施して形成されたもの
で、図2(a),(b) に示すように、周縁部に一周に亘って
ディスク21側に突出して設けられた突出部26と、こ
の突出部26から一旦、反ディスク側に斜めに延びた環
状部分27と、この環状部分27から半径方向内側に向
けてディスク21と平行に延びた環状部分28と、この
環状部分28から半径方向内側に、かつディスク21に
近付くように突出部26と環状部分27とのほぼ中間位
置まで斜めに延びた環状部分29と、この環状部分29
から半径方向内側に向けてディスク21と平行に延びた
環状部分30とで構成されている。かかる構成により、
ディスク押え部材25は、後述するようにディスク21
を押え付けた際にバネ力を発生する。
The disk pressing member 25 is formed by injection molding of resin or press working of a metal plate, and as shown in FIGS. 2 (a) and 2 (b), the disk pressing member 25 extends over the circumference. A protruding portion 26 provided so as to protrude toward the disk 21 side, an annular portion 27 that extends obliquely from the protruding portion 26 to the side opposite to the disk, and a radial direction inner side from the annular portion 27 that is parallel to the disk 21. An annular portion 28 that extends, an annular portion 29 that extends radially inward from the annular portion 28, and extends obliquely to a position approximately midway between the protrusion 26 and the annular portion 27 so as to approach the disk 21, and the annular portion 29.
And an annular portion 30 extending inward in the radial direction from the disk 21 in parallel with the disk 21. With such a configuration,
The disc pressing member 25 is used for the disc 21 as described later.
Spring force is generated when is pressed.

【0019】そして、ディスク押え部材25の環状部分
30には、締付けネジを通すための穴31が周方向に等
間隔に4個設けられている。また、ディスク押え部材2
5の環状部分28に長穴(開口部)32を設けている。
その際、長穴32の中心を、穴31の中心とディスク押
え部材25の中心とを結ぶ線(基準線)から測って+θ
および−θ(ただしθ≠ 0)の位置にし、1つの穴31
に対して2個の割合で合計8個設けるようにしている。
Further, the annular portion 30 of the disc pressing member 25 is provided with four holes 31 through which tightening screws are inserted at equal intervals in the circumferential direction. In addition, the disc pressing member 2
An elongated hole (opening) 32 is provided in the annular portion 28 of No. 5.
At that time, the center of the long hole 32 is measured from a line (reference line) connecting the center of the hole 31 and the center of the disc pressing member 25, and is + θ.
And −θ (where θ ≠ 0), and one hole 31
For a total of eight, a total of eight are provided.

【0020】すなわち、締付けネジを通すための穴31
はディスク押え部材25の中心から半径R1 の位置に周
方向に等間隔に4個設けられており、長穴32はディス
ク押え部材25の中心から半径R2 (ただし、R2 >R
1 )の位量でディスク押え部材25の中心と穴31の中
心とを結ぶ線を境にしてθの開き角をもって周方向に対
称関係に独立して設けられている。この例の場合、半径
R2 の円周上において8個の長穴32が占める割合は35
% 〜60% に設定されている。
That is, the hole 31 for passing the tightening screw
Are provided at equal intervals in the circumferential direction at a position of radius R1 from the center of the disc pressing member 25, and the elongated holes 32 have a radius R2 from the center of the disc pressing member 25 (where R2> R).
They are provided independently in a symmetrical relationship in the circumferential direction with an opening angle of θ with a line connecting the center of the disc pressing member 25 and the center of the hole 31 as a boundary in the amount of 1). In the case of this example, the ratio of the eight elongated holes 32 on the circumference of the radius R2 is 35.
It is set to% -60%.

【0021】一方、ハブ23の端面部には、穴31に対
応させて周方向に等間隔に4個のネジ穴33が設けられ
ている。そして、フランジ部24とディスク押え部材2
5とでディスク21を挟み、この状態でディスク押え部
材25に設けられた穴31を通して締付けネジをネジ穴
33に螺合させ、これら締付けネジを締付けることによ
ってディスク押え部材25のバネ力でディスク21がハ
ブ23に固定されている。
On the other hand, on the end face portion of the hub 23, four screw holes 33 are provided at equal intervals in the circumferential direction so as to correspond to the holes 31. Then, the flange portion 24 and the disc pressing member 2
5, the disk 21 is sandwiched, and in this state, a tightening screw is screwed into the screw hole 33 through a hole 31 provided in the disk pressing member 25, and the tightening screw tightens the disk 21 by the spring force of the disk pressing member 25. Are fixed to the hub 23.

【0022】このように、ディスク押え部材25に、こ
のディスク押え部材25の中心から半径R1 の位置に締
付けネジを通すための穴31を周方向に等間隔に4個設
けるとともに、ディスク押え部材31の中心から半径R
2 (ただし、R2 >R1 )の位置でディスク押え部材2
5の中心と穴31の中心とを結ぶ線を境にして周方向対
称位置に独立した長穴32をそれぞれ設けておくと、4
本の締付けネジでデイスク21をハブ23に固定する際
に発生する力を周方向に分散させることができ、押え力
の周方向の不均一性を小さくすることができる。この結
果、ディスク21の変形を低減することができる。
As described above, the disc pressing member 25 is provided with four holes 31 at the position of the radius R1 from the center of the disc pressing member 25 for passing the tightening screws at equal intervals in the circumferential direction, and at the same time, the disc pressing member 31. Radius from the center of
Disc pressing member 2 at the position of 2 (however, R2> R1)
If independent elongated holes 32 are provided at circumferentially symmetrical positions with respect to a line connecting the center of 5 and the center of hole 31, respectively, 4
The force generated when fixing the disc 21 to the hub 23 with the tightening screws can be dispersed in the circumferential direction, and the non-uniformity of the pressing force in the circumferential direction can be reduced. As a result, the deformation of the disk 21 can be reduced.

【0023】図3には長穴32の位置と大きさの最適値
を得るために構造解析プログラムΑBAQUSを用いて
シミュレーシヨンを行った結果が示されている。このシ
ミュレーシヨンでは、ドライブの製造性を考慮にいれて
ディスク押え部材25の中心と穴31の中心とを結ぶ線
を境にして周方向に対称関係で、かつ周方向に45゜等
配となるように長穴32を設けた例を対象にした。すな
わち、図4に示されるように、ディスク押え部材25a
の中心と締付けネジを通すための穴31の中心とを結ぶ
線を境にして周方向に対称関係に長穴32aを設け、か
つ穴31の中心から各長穴32aの周方向中心までの開
き角を22.5゜とした。その結果、図3に示すように円周
上に占める長穴(開口部)32の割合が35%以上60%以
下のとき、従来の装置に比べてデイスク21の曲率を大
幅に低減できることが判った。特に、ほぼ50%のときそ
の効果が最も大きいことも判った。
FIG. 3 shows the result of the simulation using the structural analysis program ΑBAQUS in order to obtain the optimum values of the position and size of the slot 32. In this simulation, considering the manufacturability of the drive, the line is symmetrical with respect to the line connecting the center of the disc pressing member 25 and the center of the hole 31, and is evenly distributed at 45 ° in the circumferential direction. Thus, the example in which the long hole 32 is provided is targeted. That is, as shown in FIG. 4, the disc pressing member 25a
The holes 32a are provided symmetrically in the circumferential direction with a line connecting the center of the hole and the center of the hole 31 for passing the tightening screw as a boundary, and opening from the center of the hole 31 to the center of each hole 32a in the circumferential direction. The angle was 22.5 °. As a result, it was found that the curvature of the disk 21 can be significantly reduced as compared with the conventional device when the ratio of the long holes (openings) 32 occupying the circumference as shown in FIG. 3 is 35% or more and 60% or less. It was In particular, it was also found that the effect was greatest at about 50%.

【0024】図5には図4に示すクランプ構成を採用し
た装置において、ディスクの周方向の曲率の変化を表面
粗さ計を用いて測定した結果が従来例の結果とともに示
されている。この図5から判るように、図4に示すクラ
ンプ構成を採用することによってディスクの曲率を大幅
に低減することができる。
FIG. 5 shows the results of measurement of changes in the curvature of the disk in the circumferential direction using a surface roughness meter in the apparatus adopting the clamp structure shown in FIG. 4 together with the results of the conventional example. As can be seen from FIG. 5, by adopting the clamp structure shown in FIG. 4, the curvature of the disk can be greatly reduced.

【0025】図6には本発明を適用した別の例が示され
ている。この例が図4に示す例と異なると点は、締付け
ネジを通すための穴31と同じ半径位置に、周方向に8
等配となるように穴31と同径のダミーの穴31aを4
個設けたことにある。
FIG. 6 shows another example to which the present invention is applied. This example is different from the example shown in FIG. 4 in that the same radial position as that of the hole 31 for passing the tightening screw is provided, and it is 8 in the circumferential direction.
Make four dummy holes 31a with the same diameter as the holes 31 so that they are evenly distributed.
It has been provided.

【0026】このように構成すると、図4と同様の効果
が得られることは勿論のこと、デイスククランプ全体が
周方向に45゜等配となるので、締付けネジを通すため
の穴31とダミー穴31aとを区別する必要がなくな
り、製造性および組立性を著しく向上できる。
With this structure, the same effect as that of FIG. 4 can be obtained, and the entire disk clamp is evenly arranged at 45 ° in the circumferential direction. Therefore, the hole 31 for inserting the tightening screw and the dummy hole are formed. Since it is not necessary to distinguish it from 31a, the manufacturability and the assemblability can be remarkably improved.

【0027】なお、上述した各例は本発明を磁気ディス
ク装置に適用した例であるが、光・磁気ディスク装置や
ヘッドとして光ピックアップだけを用いる装置にも適用
できることは勿論である。
The above-mentioned examples are examples in which the present invention is applied to a magnetic disk device, but it goes without saying that the present invention can also be applied to an optical / magnetic disk device or a device using only an optical pickup as a head.

【0028】[0028]

【発明の効果】以上説明したように、本発明によれば、
締付けネジによって発生する押え付け力を周方向に効果
的に分散させて不均一性を小さくでき、もってディスク
の変形を最小限に抑えることができる。
As described above, according to the present invention,
The pressing force generated by the tightening screw can be effectively dispersed in the circumferential direction to reduce the non-uniformity, and thus the deformation of the disk can be minimized.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1の実施形態に係る磁気ディスク装
置の分解斜視図
FIG. 1 is an exploded perspective view of a magnetic disk device according to a first embodiment of the present invention.

【図2】(a) は同装置に組み込まれたディスク押え部材
の平面図で,(b) はディスク押え部材の局部的な断面図
FIG. 2 (a) is a plan view of a disc pressing member incorporated in the same device, and (b) is a local sectional view of the disc pressing member.

【図3】ディスク押え部材に設けられる開口部の占める
割合とディスクに生じる変形曲率との関係を示す図
FIG. 3 is a diagram showing a relationship between a ratio of an opening provided in the disc pressing member and a deformation curvature generated in the disc.

【図4】ディスク押え部材の変形例を示す平面図FIG. 4 is a plan view showing a modified example of a disc pressing member.

【図5】図4に示すディスク押え部材を用いたときにデ
ィスクに生じた変形曲率実測例と従来のディスク押え部
材を用いたときにディスクに生じた変形曲率実測例とを
比較して示す図
FIG. 5 is a diagram showing a comparison example of an actually measured deformation curvature of a disk when the disk pressing member shown in FIG. 4 is used and an actually measured deformation curvature of a disk when a conventional disk pressing member is used.

【図6】ディスク押え部材の別の変形例を示す平面図FIG. 6 is a plan view showing another modified example of the disc pressing member.

【図7】従来の磁気ディスク装置の分解斜視図FIG. 7 is an exploded perspective view of a conventional magnetic disk device.

【図8】従来装置の問題点を説明するための図FIG. 8 is a diagram for explaining a problem of the conventional device.

【図9】ディスクの変形に伴う浮上すきまの変動を説明
するための図
FIG. 9 is a diagram for explaining the fluctuation of the floating clearance due to the deformation of the disk.

【図10】従来装置におけるディスク変形曲率の実測例
を示す図
FIG. 10 is a diagram showing an example of actual measurement of disk deformation curvature in a conventional device.

【図11】従来装置に組込まれたディスク押え部材の別
の例を示す平面図
FIG. 11 is a plan view showing another example of the disc pressing member incorporated in the conventional device.

【図12】図11に示すディスク押え部材を用いたとき
にディスクに生じた変形量および変形曲率実測例を示す
FIG. 12 is a diagram showing an example of actually measuring the deformation amount and the deformation curvature of the disc when the disc pressing member shown in FIG. 11 is used.

【図13】従来の磁気ディスク装置の別の例の分解斜視
FIG. 13 is an exploded perspective view of another example of a conventional magnetic disk device.

【符号の説明】[Explanation of symbols]

21…ディスク 22…スピンドルモータ 23…ハブ 24…フランジ部 25,25a,25b…ディスク押え部材 26…突出部 27,28,29,30…環状部分 31…締付けネジを通すための穴 31a…ダミー穴 32,32a…長穴(開口部) 33…ネジ穴 21 ... Disc 22 ... Spindle motor 23 ... Hub 24 ... Flange portion 25, 25a, 25b ... Disc pressing member 26 ... Projection portion 27, 28, 29, 30 ... Annular portion 31 ... Hole for inserting tightening screw 31a ... Dummy hole 32, 32a ... elongated hole (opening) 33 ... screw hole

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】データの記録媒体であるディスクと、この
ディスクを支持するハブと、このハブに対して前記ディ
スクを押え付けるディスク押え部材とを備え、上記ハブ
に対して上記ディスク押え部材を複数の締付けネジで締
め付けることによって上記ディスクを上記ハブに固定す
る構造のデータ記録装置において、 前記ディスク押え部材は、該ディスク押え部材の中心か
ら半径R1 の円周上に前記締付けネジを通すための穴を
周方向に等間隔に複数個備えるとともに、上記ディスク
押え部材の中心から半径R2 (ただし、R2 >R1 )の
円周上でディスク押え部材の中心と上記穴の中心とを結
ぶ線を境とする周方向対称位置にそれぞれ独立した開口
部を備えていることを特徴とするデータ記録装置。
1. A disk as a data recording medium, a hub for supporting the disk, and a disk pressing member for pressing the disk against the hub, and a plurality of the disk pressing members for the hub. In the data recording device having a structure for fixing the disc to the hub by tightening with the tightening screw, the disk holding member has a hole for passing the tightening screw on the circumference of a radius R1 from the center of the disk holding member. Are provided at equal intervals in the circumferential direction, and a line connecting the center of the disc pressing member and the center of the hole is defined as a boundary on the circumference of a radius R2 (where R2> R1) from the center of the disc pressing member. A data recording device having independent openings at circumferentially symmetrical positions.
【請求項2】前記開口部は、前記半径R2 の円周上にお
いて占める割合が35%以上60%以下、好ましくはほぼ50
%であることを特徴とする請求項1に記載のデータ記録
装置。
2. The ratio of the opening to the circumference of the radius R2 is 35% or more and 60% or less, preferably about 50%.
The data recording device according to claim 1, wherein the data recording device is%.
【請求項3】前記開口部は、該開口部における周方向の
中心と締付けネジを通すための前記穴の中心との間の周
方向の開き角が22.5度に設定されていることを特徴とす
る請求項1または2に記載のデータ記録装置。
3. An opening angle in the circumferential direction between the center of the opening in the circumferential direction and the center of the hole for passing the tightening screw is set to 22.5 degrees. The data recording device according to claim 1 or 2.
JP2909396A 1996-02-16 1996-02-16 Data recorder Pending JPH09223346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2909396A JPH09223346A (en) 1996-02-16 1996-02-16 Data recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2909396A JPH09223346A (en) 1996-02-16 1996-02-16 Data recorder

Publications (1)

Publication Number Publication Date
JPH09223346A true JPH09223346A (en) 1997-08-26

Family

ID=12266749

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2909396A Pending JPH09223346A (en) 1996-02-16 1996-02-16 Data recorder

Country Status (1)

Country Link
JP (1) JPH09223346A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6504674B2 (en) 1998-05-18 2003-01-07 Fujitsu Limited Recording disk apparatus and clamp therefor
KR20030021678A (en) * 2001-09-07 2003-03-15 삼성전자주식회사 Clamp structure of a hard disk driver
US6542330B1 (en) * 1999-06-30 2003-04-01 Seagate Technology Llc Disc clamp for improved disc stack balance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6504674B2 (en) 1998-05-18 2003-01-07 Fujitsu Limited Recording disk apparatus and clamp therefor
US6542330B1 (en) * 1999-06-30 2003-04-01 Seagate Technology Llc Disc clamp for improved disc stack balance
KR20030021678A (en) * 2001-09-07 2003-03-15 삼성전자주식회사 Clamp structure of a hard disk driver

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