JPH0548554B2 - - Google Patents
Info
- Publication number
- JPH0548554B2 JPH0548554B2 JP61015790A JP1579086A JPH0548554B2 JP H0548554 B2 JPH0548554 B2 JP H0548554B2 JP 61015790 A JP61015790 A JP 61015790A JP 1579086 A JP1579086 A JP 1579086A JP H0548554 B2 JPH0548554 B2 JP H0548554B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- disk
- spindle
- magnetic
- spacer
- 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 - Fee Related
Links
- 125000006850 spacer group Chemical group 0.000 claims description 34
- 239000000758 substrate Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920004943 Delrin® Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229910018104 Ni-P Inorganic materials 0.000 description 1
- 229910018536 Ni—P Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は磁気デイスク装置に関し、特に磁気デ
イスクを確実に固定でき、該デイスクの破損を未
然に防止し得るようにしたものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a magnetic disk device, and particularly to a magnetic disk device that can securely fix a magnetic disk and prevent damage to the disk.
〔従来の技術〕
従来からこの種の磁気デイスク装置としては
種々提案され、実用に供されているが、その一例
として第６図に示すウインチエスタ型磁気デイス
ク装置が知られている。これはスピンドル３の外
周面に複数個の磁気デイスク１をスペーサ２を介
して嵌挿かつ積層配置し、このスピンドル３の内
部にモータ４を配設し、該モータ４の軸を静止シ
ヤフト（固定軸）５とし、その外側を回転させる
ようにした点に特徴を有するもので、静止シヤフ
ト５にコイルを取付けてステータ６とし、スピン
ドル３の内壁に磁石７を取付けることによりスピ
ンドル３をモータ４の駆動に伴つて高速回転（例
3600r.p.m）させるように構成されている。磁気
デイスク１は一般にAl、Al合金等からなる金属
製の基板上に磁性膜を形成したものが使用され、
スピンドル３の上端面に止めねじ８によつて固定
された締め付け金具９により押圧されることによ
り、スピンドル３の下端部外周面に一体に突設さ
れた台座部１０上に固定される。これにより磁気
デイスク１に作用する慣性モーメントによる磁気
デイスク１の空回りを防止すると同時に、磁気デ
イスク１が相対的に位置ずれするのを防止してい
る。スペーサ２はAl、Al合金等からなり、スピ
ンドル３は硬鋼の一種で製作されている。[Prior Art] Various magnetic disk devices of this type have been proposed and put into practical use, one example of which is known as a winchiesta type magnetic disk device shown in FIG. In this method, a plurality of magnetic disks 1 are inserted and stacked on the outer peripheral surface of a spindle 3 via spacers 2, a motor 4 is disposed inside the spindle 3, and the shaft of the motor 4 is connected to a stationary shaft (fixed shaft). This shaft is characterized by having a shaft (shaft) 5, which rotates on the outside.A coil is attached to the stationary shaft 5 to form the stator 6, and a magnet 7 is attached to the inner wall of the spindle 3 to connect the spindle 3 to the motor 4. High-speed rotation (e.g.
3600r.pm). The magnetic disk 1 is generally formed by forming a magnetic film on a metal substrate made of Al, Al alloy, etc.
By being pressed by a tightening fitting 9 fixed to the upper end surface of the spindle 3 by a set screw 8, the spindle 3 is fixed onto a pedestal portion 10 integrally protruding from the outer circumferential surface of the lower end portion of the spindle 3. This prevents the magnetic disk 1 from spinning idly due to the moment of inertia acting on the magnetic disk 1, and at the same time prevents the magnetic disk 1 from relative displacement. The spacer 2 is made of Al, Al alloy, etc., and the spindle 3 is made of a type of hard steel.
なお、１１はベアリングである。 Note that 11 is a bearing.
〔発明が解決しようとする問題点〕
ところで、近年高記録密度の要求に応えるべく
磁気デイスクの基板材料としてガラス、セラミツ
クス等の所謂脆弱材料からなる基板が注目されて
きた。その大きな理由はAl、Al合金製の基板よ
りも表面の欠陥が少なく、かつNi−Ｐやアルマ
イトのような硬度の高い下地層を必要とせず磁性
膜を製作できるという優れた特徴を備えているこ
とにある。しかしながら、単に金属製の基板を脆
弱材料からなる基板に置き換えただけでは磁気デ
イスクが破損しやすいため問題があつた。[Problems to be Solved by the Invention] In recent years, substrates made of so-called brittle materials such as glass and ceramics have attracted attention as substrate materials for magnetic disks in order to meet the demands for high recording density. The main reason for this is that it has fewer surface defects than Al or Al alloy substrates, and has the excellent feature of being able to produce magnetic films without the need for a highly hard underlayer such as Ni-P or alumite. There is a particular thing. However, simply replacing the metal substrate with a substrate made of a brittle material poses a problem because the magnetic disk is likely to be damaged.
すなわち、磁気デイスクの基板が金属の場合
は、外力に対して破損しないが、ガラスやセラミ
ツクスのような脆弱材料は外力に対して弱く、破
損しやすいことによるもので、その主な原因とし
て２つが考えられる。その１つはスペーサ２、締
め付け金具９および台座部１０の表面加工仕上げ
が悪いために局部的に大きな力が加わると、磁気
デイスク１が破損してしまうこと、他の１つは磁
気デイスク１、スペーサ２およびスピンドル３の
熱膨脹係数が夫々異なつているため、周囲温度が
変化した時、特に高温時にガラスやセラミツクス
に異常な力が作用して磁気デイスク１を破壊して
しまうことである。但し、これら２つの原因は必
ずしも明白に区別できない場合が多く、また、２
つの原因が複合して破損することもあるものであ
る。 In other words, if the magnetic disk substrate is made of metal, it will not break due to external forces, but brittle materials such as glass or ceramics are weak against external forces and easily break.There are two main reasons for this. Conceivable. One of them is that the magnetic disk 1 will be damaged if a large force is applied locally due to the poor surface finish of the spacer 2, the fastening fittings 9, and the pedestal 10, and the other is that the magnetic disk 1, Since the spacer 2 and the spindle 3 have different coefficients of thermal expansion, when the ambient temperature changes, especially at high temperatures, an abnormal force acts on the glass or ceramics, causing the magnetic disk 1 to be destroyed. However, these two causes are often not clearly distinguishable, and
Damage may occur due to a combination of two causes.
本発明に係る磁気デイスク装置は上述したよう
な問題を解決すべくなされたもので、固定軸に対
して回転自在に配設されモータ駆動によつて回転
されるスピンドルと、このスピンドルの外周面に
嵌挿され、かつこの外周面の下方部に設けられた
台座部上に積層配置された複数個の磁気デイスク
と、これらの磁気デイスク間に介在されデイスク
間隔を一定に保持する複数個のスペーサと、前記
スピンドルの上方端面に固定されて前記台座部に
対向する前記磁気デイスクの部分を押圧する締め
付け金具とを具備してなり、前記磁気デイスク基
板をガラス、セラミツク等の脆弱材料で製作し、
前記スペーサはスピンドルの外周面に嵌合される
筒部と、この筒部の下端部外周面に突設され磁気
デイスクが載置されるデイスク受部と、前記筒部
の下端面に設けられ下方に隣り合うスペーサの筒
部をその上端部が当接するように嵌合する嵌合部
とを有し、前記デイスク受部の下面と、その下方
に位置する磁気デイスクとの間にリング状の弾性
体を介在させたものである。
The magnetic disk device according to the present invention has been made to solve the above-mentioned problems, and includes a spindle that is rotatably arranged around a fixed shaft and rotated by a motor drive, and a spindle that is attached to the outer peripheral surface of the spindle. A plurality of magnetic disks are fitted and stacked on a pedestal provided at a lower part of the outer circumferential surface, and a plurality of spacers are interposed between these magnetic disks to maintain a constant disk spacing. , a tightening fitting fixed to the upper end surface of the spindle to press a portion of the magnetic disk facing the pedestal, the magnetic disk substrate being made of a fragile material such as glass or ceramic;
The spacer includes a cylindrical portion fitted to the outer peripheral surface of the spindle, a disk receiving portion protruding from the outer periphery of the lower end of the cylindrical portion and on which a magnetic disk is placed, and a disk receiving portion provided on the lower end surface of the cylindrical portion and extending downward. and a fitting portion that fits the cylindrical portions of adjacent spacers so that their upper ends abut, and a ring-shaped elastic member is provided between the lower surface of the disk receiving portion and the magnetic disk located below the fitting portion. It is something that involves the body.
本発明においては、デイスク受部の下面と、そ
の下方に位置する磁気デイスクとの間にリング状
の弾性体を介在させたので、締付け金具を締め付
け固定した時、弾性体が弾性変形して磁気デイス
クの表面になじみ、磁気デイスクが均一な力で締
め付けられるように作用すると共に、温度上昇に
伴う磁気デイスク、スピンドルおよびスペーサの
熱膨張差に原因して磁気デイスクに余分な力が加
わるのを防止するように作用するため、磁気デイ
スクの破損を未然に防止する。また、本発明のス
ペーサはその筒部が互いに当接して嵌合している
ので、弾性体の弾性変形によつてデイスク間の間
隔が変化することがなく一定に保つことができ、
磁気デイスクが半径方向にずれることも防止でき
る。
In the present invention, since a ring-shaped elastic body is interposed between the lower surface of the disk receiving part and the magnetic disk located below, when the fastening fitting is tightened and fixed, the elastic body is elastically deformed and magnetically It conforms to the surface of the disk and acts to tighten the magnetic disk with uniform force, while also preventing excessive force from being applied to the magnetic disk due to differences in thermal expansion between the magnetic disk, spindle, and spacer due to temperature rise. This prevents damage to the magnetic disk. Further, since the spacer of the present invention has its cylindrical portions abutting and fitting together, the spacing between the disks does not change due to elastic deformation of the elastic body and can be kept constant.
It is also possible to prevent the magnetic disk from shifting in the radial direction.
以下、本発明を図面に示す実施例に基づいて詳
細に説明する。
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第１図は本発明を５ 1/4インチサイズのウイン
チエスタ型磁気デイスク装置に適用した場合の一
実施例を示すデイスク回転部分の断面図、第２図
は要部拡大断面図である。これらの図において、
本実施例は磁気デイスク１の基板２０をガラスま
たはセラミツクスからなる脆弱材料によつて製作
した点と、デイスク間隔を設定するスペーサ２お
よび締め付け金具９の形状を変えた点と、スペー
サ２と磁気デイスク１との間にＯリング等からな
るリング状の弾性体２３を介在させた点とが第６
図に示した従来装置と異なるだけで、他の構造は
同様である。したがつて、同一構成部材のものに
対しては同一符号を以つて示し、その説明を省略
する。 FIG. 1 is a cross-sectional view of a disk rotating portion showing an embodiment of the present invention applied to a 5 1/4-inch winch-estor type magnetic disk device, and FIG. 2 is an enlarged cross-sectional view of the main part. In these figures,
In this embodiment, the substrate 20 of the magnetic disk 1 is made of a fragile material such as glass or ceramics, the shapes of the spacer 2 and the fastening fitting 9 for setting the disk spacing are changed, and the spacer 2 and the magnetic disk A ring-shaped elastic body 23 made of an O-ring or the like is interposed between the point 1 and the point 6.
The only difference from the conventional device shown in the figure is that other structures are the same. Therefore, the same constituent members are designated by the same reference numerals and their explanations will be omitted.
前記基板２０としてはソーダライムガラスから
なり、外径130mmφ、内径43mmφ、厚さ1.9mmの円
板状に形成されている。そして、基板２０の表裏
面には従来周知の技術により所定厚みの磁性膜２
６がそれぞれ形成されている。磁性膜２６として
は、例えば基板２０上に成膜されたCo−Ni膜磁
性層と、このCo−Ni膜磁性層を被覆保護するＣ
膜層とで構成されるが、これに限らず基板２０と
Co−Ni膜磁性層との間にZrO2膜、Cr膜等の下地
層が設けられるものであつてもよい。 The substrate 20 is made of soda lime glass and is formed into a disk shape with an outer diameter of 130 mm, an inner diameter of 43 mm, and a thickness of 1.9 mm. A magnetic film 2 with a predetermined thickness is formed on the front and back surfaces of the substrate 20 using a conventionally well-known technique.
6 are formed respectively. The magnetic film 26 includes, for example, a Co--Ni magnetic layer formed on the substrate 20 and a carbon film that covers and protects the Co--Ni magnetic layer.
Although it is not limited to this, it is composed of a substrate 20 and a film layer.
A base layer such as a ZrO 2 film or a Cr film may be provided between the Co--Ni film magnetic layer.
前記スペーサ２はAl、Al合金、鉄、チタン等
で第３図に示す如き略Ｌ字状の断面形状に形成さ
れることにより、スピンドル３の外周面に嵌合す
る筒部２Ａと、この筒部２Ａの下端部外周面に全
周に亘つて突設された鍔状のデイスク受部２Ｂ
と、筒部２Ａの下端面に設けられ、下方に位置す
る他のスペーサ２の筒部２Ａの上端部が下方より
嵌合する嵌合部２Ｃとを有し、この嵌合により互
いに隣接するスペーサはその筒部２Ａにおいて互
いに当接し、一連にかつ同軸的に積層配置される
ように構成されている。筒部２Ａの外径は、磁気
デイスク１の内径とほぼ等しく内径はスピンドル
３の外径とほぼ等しい。デイスク受部２Ｂの上面
には磁気デイスク１が設置され、また各スペーサ
２のデイスク受部２Ｂと磁気デイスク１との間に
前記弾性体２３が介在されている。 The spacer 2 is made of Al, Al alloy, iron, titanium, etc. and has a substantially L-shaped cross section as shown in FIG. A flange-shaped disk receiving portion 2B protrudes from the outer peripheral surface of the lower end portion of the portion 2A over the entire circumference.
and a fitting part 2C provided on the lower end surface of the cylindrical part 2A, into which the upper end part of the cylindrical part 2A of another spacer 2 located below is fitted from below, and by this fitting, the adjacent spacers are in contact with each other at the cylindrical portion 2A, and are arranged in series and coaxially in a stacked manner. The outer diameter of the cylindrical portion 2A is approximately equal to the inner diameter of the magnetic disk 1, and the inner diameter is approximately equal to the outer diameter of the spindle 3. The magnetic disk 1 is installed on the upper surface of the disk receiving portion 2B, and the elastic body 23 is interposed between the disk receiving portion 2B of each spacer 2 and the magnetic disk 1.
弾性体２３の材質としてはウレタンゴム、アク
リルゴム、シリコンゴム、エチレンプロピレンゴ
ムなどの合成ゴムが使用されるが、更にはこれら
の混合物もしくはこれらを積層した複合材料であ
つてもよい。但し、これらの材料は−40℃〜70℃
までの許容保存温度範囲において著しい塑性変形
を生じないように合成されたものであることが望
ましい。 As the material of the elastic body 23, synthetic rubbers such as urethane rubber, acrylic rubber, silicone rubber, and ethylene propylene rubber are used, but it may also be a mixture of these rubbers or a composite material made by laminating them. However, these materials can be heated between -40℃ and 70℃.
It is desirable that the composition be such that no significant plastic deformation occurs within the permissible storage temperature range up to.
弾性体２３は第４図に示すように断面形状が円
形で、太さが磁気デイスク１とデイスク受部２Ｂ
との間隔Ｄより大きく、したがつて組込まれる
と、第２図に示す如くデイスク受部２Ｂによつて
押しつぶされ、磁気デイスク１の表面に密着す
る。この結果磁気デイスク１はデイスク受部２Ｂ
上に固定される。弾性体２３の太さＲは前記間隔
Ｄ（例2.8mm）に対して1.05〜1.3倍が望ましい。そ
の理由は、磁気デイスク１の空回り防止と、押圧
によつて弾性体２３が塑性変形を生じないためで
ある。 As shown in FIG. 4, the elastic body 23 has a circular cross-sectional shape and a thickness equal to that of the magnetic disk 1 and the disk receiving portion 2B
Therefore, when it is assembled, it is crushed by the disk receiving portion 2B and comes into close contact with the surface of the magnetic disk 1, as shown in FIG. As a result, the magnetic disk 1 is placed in the disk receiving portion 2B.
fixed on top. The thickness R of the elastic body 23 is preferably 1.05 to 1.3 times the distance D (eg, 2.8 mm). The reason for this is to prevent the magnetic disk 1 from spinning idly and to prevent the elastic body 23 from undergoing plastic deformation due to pressure.
締め付け金具９は外周面下部に形成された環状
溝３０を有し、この環状溝３０にも最上位の磁気
デイスク１を押圧固定するための弾性体２３が嵌
合されている。本実施例は締め付け金具９の下面
外周部を、最上位スペーサ２の筒部２Ａとスピン
ドル３の上端面に当接させた例を示したが、これ
に限らず例えば第５図に示すように前記環状溝３
０に加えて筒部２Ａの上部が嵌合するスペーサ用
溝３２を形成し、これによつて最上位のスペーサ
２を押圧するようにしてもよい。 The fastening fitting 9 has an annular groove 30 formed in the lower part of its outer peripheral surface, and an elastic body 23 for press-fixing the uppermost magnetic disk 1 is also fitted into this annular groove 30. Although this embodiment shows an example in which the outer circumference of the lower surface of the tightening fitting 9 is brought into contact with the cylindrical portion 2A of the uppermost spacer 2 and the upper end surface of the spindle 3, the present invention is not limited to this, and for example, as shown in FIG. Said annular groove 3
0, a spacer groove 32 into which the upper part of the cylindrical portion 2A fits may be formed, thereby pressing the uppermost spacer 2.
磁気デイスク１の組込みに際しては、先ず１枚
目のスペーサ２ａをスピンドル３の外周面に嵌挿
して台座部１０上に設置し、次に１枚目の磁気デ
イスク１ａを前記スペーサ２ａの筒部２Ａに嵌挿
しデイスク受部２Ｂ上に設置する。次に、１枚目
の弾性体２３ａを前記スペーサ２ａの筒部２Ａに
嵌挿して１枚目の磁気デイスク１ａ上に設置した
後２枚目のスペーサ２ｂを１枚目のスペーサ２ａ
上に設置する。次に、２枚目の磁気デイスク１
ｂ、２枚目の弾性体２３ｂ、３枚目のスペーサ２
ｃ……という具合に順次スペーサ、磁気デイスク
および弾性体を積層した後、締め付け金具９をス
ピンドル３の上面に止めねじ８で固定し、磁気デ
イスク１全体を台座部１０上に固定すればよい。 When assembling the magnetic disk 1, first the first spacer 2a is fitted onto the outer peripheral surface of the spindle 3 and installed on the pedestal portion 10, and then the first magnetic disk 1a is inserted into the cylindrical portion 2A of the spacer 2a. and install it on the disk holder 2B. Next, the first elastic body 23a is fitted into the cylindrical portion 2A of the spacer 2a and installed on the first magnetic disk 1a, and then the second spacer 2b is inserted into the first spacer 2a.
Place it on top. Next, the second magnetic disk 1
b, second elastic body 23b, third spacer 2
After stacking the spacer, the magnetic disk, and the elastic body in this order, the clamping fitting 9 is fixed to the upper surface of the spindle 3 with the set screw 8, and the entire magnetic disk 1 is fixed on the pedestal 10.
かくしてこのような構成からなる磁気デイスク
装置によれば、弾性体２３の作用により磁気デイ
スク１の破損を未然に防止し得るものである。す
なわち、弾性体２３は締め付け金具９を締付けた
時、弾性変形して磁気デイスク１、スペーサ２、
締め付け金具９および台座部１０の各表面になじ
み、磁気デイスク１が均一なで押圧されるように
作用するとともに、温度上昇に伴う磁気デイスク
１、スペーサ２およびスピンドル３の各材料の熱
膨脹差に原因して磁気デイスク１に余分な力が加
わることを防止するように作用する。したがつ
て、磁気デイスク１は変形せず、破損することが
ない。 According to the magnetic disk device having such a configuration, damage to the magnetic disk 1 can be prevented by the action of the elastic body 23. That is, when the tightening fitting 9 is tightened, the elastic body 23 is elastically deformed and the magnetic disk 1, spacer 2,
It conforms to the surfaces of the fastening fitting 9 and the pedestal 10, and acts so that the magnetic disk 1 is evenly pressed. This acts to prevent excessive force from being applied to the magnetic disk 1. Therefore, the magnetic disk 1 will not be deformed and will not be damaged.
磁気デイスク１を締め付け金具９で押圧する圧
力としては１Kg／mm2〜３Kg／mm2の範囲内であるこ
とが望ましく、この範囲内であれば毎分3600回転
するスピンドル３について、スタートストツプサ
イクル（磁気デイスクの回転開始と停止の繰り返
し数）104回以上にわたつてデイスク相互間で位
置ずれを起こすことはなかつた。また、−40℃か
ら70℃までの熱サイクルテストにおいても磁気デ
イスク１が割れることはなかつた。 The pressure with which the magnetic disk 1 is pressed by the clamping fitting 9 is preferably within the range of 1Kg/mm 2 to 3Kg/mm 2 , and within this range, the start-stop cycle for the spindle 3 rotating at 3600 revolutions per minute. (Number of repetitions of starting and stopping the rotation of the magnetic disks) 10 No positional deviation occurred between the disks over 4 times or more. Further, the magnetic disk 1 did not crack even in a thermal cycle test from -40°C to 70°C.
磁気デイスク装置では、磁気デイスク１の位置
は磁気ヘツドとの相対的な関係で決められるの
で、特にデイスク間隔Ｌ（５mm）において、一定
の比較的高い精度が要求されるものである。本実
施例によるウインチエスタ型磁気デイスク装置の
場合、磁気デイスク全体は、積層配置されるスペ
ーサ２同士の嵌合によつてデイスク間隔Ｌが確保
される。 In a magnetic disk device, the position of the magnetic disk 1 is determined by the relative relationship with the magnetic head, and therefore a certain relatively high degree of accuracy is required, especially in the disk spacing L (5 mm). In the case of the winchester type magnetic disk device according to this embodiment, the disk spacing L is ensured for the entire magnetic disk by fitting the spacers 2 arranged in a stacked manner.
なお、上記実施例は磁気デイスク１の上面側に
のみ弾性体２３を配設したが、下面側にも配置し
てもよいことは勿論である。 In the above embodiment, the elastic body 23 is disposed only on the upper surface side of the magnetic disk 1, but it goes without saying that it may also be disposed on the lower surface side.
また、スペーサ２は金属製のものに限らずガラ
ス、セラミツクス、アクリル、エポキシ、ベーク
ライト、テフロン、デルリン等の非金属で形成さ
れるものであつてもよい。要はその熱膨脹係数が
スピンドル３のそれに近い材質のものを使用する
ことが望ましい。 Further, the spacer 2 is not limited to being made of metal, but may be made of non-metal such as glass, ceramics, acrylic, epoxy, Bakelite, Teflon, Delrin, and the like. In short, it is desirable to use a material whose coefficient of thermal expansion is close to that of the spindle 3.
また、上記実施例は磁気デイスウ１の基板材料
としてソーダライムガラスを使用したが、アルミ
ノシリケートガラス、石英ガラスなど各種のガラ
スを使用することも可能である。 Further, although soda lime glass was used as the substrate material of the magnetic disk 1 in the above embodiment, it is also possible to use various glasses such as aluminosilicate glass and quartz glass.
さらに、上記実施例はウインチエスタ型磁気デ
イスク装置に適用した場合について説明したが、
これら何ら特定されるものではない。 Furthermore, although the above embodiment was applied to a winchiesta type magnetic disk device,
None of these are specified.
以上説明したように本発明に係る磁気デイスク
装置は、磁気デイスクの基板をガラス、セラミツ
クス等の脆弱材料で製作し、磁気デイスクとスペ
ーサとの間にリング状の弾性体を介在させたの
で、締め付け金具の締付け時に局部的大きな力が
磁気デイスクに加わつたり、温度上昇に伴うスピ
ンドル、スペーサ、磁気デイスクおよび締め付け
金具の熱膨脹差により大きな力が磁気デイスクに
加わつたりせず、その上デイスク表面もしくはス
ペーサの表面が粗くとも弾性体によつて押圧して
いるため、局所的な大きな力が均等化され、した
がつて磁気デイスクの破損を未然に防止でき、か
つ磁気デイスク間の間隔を一定に保ち、半径方向
のスレも防止でき、高密度記録に適した磁気デイ
スク装置を提供することができる。
As explained above, in the magnetic disk device according to the present invention, the substrate of the magnetic disk is made of a fragile material such as glass or ceramics, and a ring-shaped elastic body is interposed between the magnetic disk and the spacer. When tightening the metal fittings, a large local force is not applied to the magnetic disk, and a large force is not applied to the magnetic disk due to the difference in thermal expansion of the spindle, spacer, magnetic disk, and tightening fittings due to temperature rise, and the disk surface or Even if the surface of the spacer is rough, since it is pressed by an elastic body, the large local force is equalized, which prevents damage to the magnetic disks and maintains a constant spacing between the magnetic disks. Therefore, it is possible to prevent scratches in the radial direction and provide a magnetic disk device suitable for high-density recording.
第１図は本発明をウインチエスタ型磁気デイス
ク装置に適用した場合の一実施例を示すデイスク
回転部分の断面図、第２図は要部拡大断面図、第
３図はスペーサの断面図、第４図は弾性体の断面
図、第５図は締め付け金具の他の実施例を示す断
面図、第６図はウインチエスタ型磁気デイスク装
置の従来例を示すデイスク回転部分の断面図であ
る。
１，１ａ，１ｂ……磁気デイスク、２，２ａ，
２ｂ，２ｃ……スペーサ、２Ａ……筒部、２Ｂ…
…デイスク受部、２Ｃ……嵌合部、３……スピン
ドル、４……モータ、５……固定軸、９…締め付
け金具、１０……台座部、２０……基板、２３…
…弾性体。
FIG. 1 is a cross-sectional view of a rotating portion of a disk showing an embodiment of the present invention applied to a winchiesta type magnetic disk device, FIG. 2 is an enlarged cross-sectional view of main parts, and FIG. 4 is a cross-sectional view of the elastic body, FIG. 5 is a cross-sectional view showing another embodiment of the fastening fitting, and FIG. 6 is a cross-sectional view of a disk rotating portion showing a conventional example of a winchester type magnetic disk device. 1, 1a, 1b...magnetic disk, 2, 2a,
2b, 2c...Spacer, 2A...Cylinder part, 2B...
... Disk receiving part, 2C ... Fitting part, 3 ... Spindle, 4 ... Motor, 5 ... Fixed shaft, 9 ... Tightening fitting, 10 ... Pedestal part, 20 ... Board, 23 ...
...Elastic body.
Claims (1)
動によつて回転されるスピンドルと、このスピン
ドルの外周面に嵌挿され、かつこの外周面の下方
部に設けられた台座部上に積層配置された複数個
の磁気デイスクと、これらの磁気デイスク間に介
在されデイスク間隔を一定に保持する複数個のス
ペーサと、前記スピンドルの上方端面に固定され
て前記台座部に対向する前記磁気デイスクの部分
を押圧する締め付け金具とを具備してなり、前記
磁気デイスク基板をガラス、セラミツクス等の脆
弱材料で製作し、前記スペーサはスピンドルの外
周面に嵌合される筒部と、この筒部の下端部外周
面に突設され磁気デイスクが載置されるデイスク
受部と、前記筒部の下端面に設けられ下方に隣り
合うスペーサの筒部をその上面が当接するように
嵌合する嵌合部とを有し、前記デイスク受部の下
面と、その下方に位置する磁気デイスクとの間に
リング状の弾性体を介在させたことを特徴とする
磁気デイスク装置。1. A spindle that is rotatably arranged around a fixed shaft and rotated by a motor drive, and a pedestal that is fitted onto the outer peripheral surface of the spindle and provided below the outer peripheral surface. a plurality of magnetic disks, a plurality of spacers interposed between these magnetic disks to maintain constant disk spacing, and a portion of the magnetic disk fixed to an upper end surface of the spindle and facing the pedestal. the magnetic disk substrate is made of a fragile material such as glass or ceramics; a disk receiving part protruding from the outer circumferential surface on which the magnetic disk is placed; and a fitting part provided on the lower end surface of the cylindrical part and fitting the cylindrical parts of the spacers adjacent to each other downwardly so that the upper surfaces thereof are in contact with each other. What is claimed is: 1. A magnetic disk device comprising: a ring-shaped elastic body interposed between a lower surface of the disk receiving portion and a magnetic disk located below the lower surface of the disk receiving portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1579086A JPS62175980A (en) | 1986-01-29 | 1986-01-29 | Magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1579086A JPS62175980A (en) | 1986-01-29 | 1986-01-29 | Magnetic disk device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62175980A JPS62175980A (en) | 1987-08-01 |
| JPH0548554B2 true JPH0548554B2 (en) | 1993-07-21 |
Family
ID=11898630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1579086A Granted JPS62175980A (en) | 1986-01-29 | 1986-01-29 | Magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62175980A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0692263B2 (en) * | 1989-02-16 | 1994-11-16 | 伊藤忠商事株式会社 | Recording disk substrate and manufacturing method thereof |
| JPH04102282A (en) * | 1990-08-17 | 1992-04-03 | Nec Ibaraki Ltd | Magnetic disk device |
| KR19990061750A (en) * | 1997-12-31 | 1999-07-26 | 윤종용 | Hard disk assembly |
| JP2010067324A (en) * | 2008-09-11 | 2010-03-25 | Hitachi Global Storage Technologies Netherlands Bv | Disk drive and spacer |
| US10872635B2 (en) | 2017-08-31 | 2020-12-22 | Hoya Corporation | Spacer and hard disk drive apparatus |
| WO2019066086A1 (en) * | 2017-09-29 | 2019-04-04 | Hoya株式会社 | Glass spacer and hard disc drive device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59186179A (en) * | 1983-04-08 | 1984-10-22 | Hitachi Ltd | Magnetic disc assembling structure |
| JPS61129765A (en) * | 1984-08-22 | 1986-06-17 | マツクスタ−・コ−ポレ−シヨン | Sprindle hub-disc interface construction |
| JPS61148667A (en) * | 1984-12-20 | 1986-07-07 | Fujitsu Ltd | Attaching structure of magnetic disc |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60173180U (en) * | 1984-04-23 | 1985-11-16 | ソニー株式会社 | magnetic disk |
-
1986
- 1986-01-29 JP JP1579086A patent/JPS62175980A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59186179A (en) * | 1983-04-08 | 1984-10-22 | Hitachi Ltd | Magnetic disc assembling structure |
| JPS61129765A (en) * | 1984-08-22 | 1986-06-17 | マツクスタ−・コ−ポレ−シヨン | Sprindle hub-disc interface construction |
| JPS61148667A (en) * | 1984-12-20 | 1986-07-07 | Fujitsu Ltd | Attaching structure of magnetic disc |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62175980A (en) | 1987-08-01 |
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| LAPS | Cancellation because of no payment of annual fees |