JPH0548298Y2 - - Google Patents
Info
- Publication number
- JPH0548298Y2 JPH0548298Y2 JP1986032403U JP3240386U JPH0548298Y2 JP H0548298 Y2 JPH0548298 Y2 JP H0548298Y2 JP 1986032403 U JP1986032403 U JP 1986032403U JP 3240386 U JP3240386 U JP 3240386U JP H0548298 Y2 JPH0548298 Y2 JP H0548298Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- arm
- stacked
- head arm
- magnetic disk
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 16
- 238000010586 diagram Methods 0.000 description 8
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 description 7
- 239000011777 magnesium Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Landscapes
- Supporting Of Heads In Record-Carrier Devices (AREA)
- Moving Of Heads (AREA)
Description
【考案の詳細な説明】
〔概要〕
線膨張係数の小なる材質のシリンダの周囲に線
膨張係数の大きな材質のヘツドアームが積層さ
れ、上部がアーム押えでシリンダに固定される如
き磁気デイスク装置のキヤリツジにおいて、アー
ム押えを環状でバネ性を有する形状とし、アーム
押えの外周部の下方への弾性力で最上部のヘツド
アームのクランプ部分を押えてヘツドアームをシ
リンダに固定することによつてキヤリツジでの対
振動特性及びオフトラツク特性を向上させる。[Detailed description of the invention] [Summary] A magnetic disk drive carriage in which a head arm made of a material with a large coefficient of linear expansion is laminated around a cylinder made of a material with a small coefficient of linear expansion, and the upper part is fixed to the cylinder with an arm holder. In this case, the arm holder is annular and has a springy shape, and the downward elastic force of the outer periphery of the arm holder presses the clamp part of the uppermost head arm and fixes the head arm to the cylinder, thereby making it possible to attach the head arm to the cylinder. Improves vibration characteristics and off-track characteristics.
本考案は、ヘツドアーム積層構造の磁気デイス
ク装置のキヤリツジに関する。
The present invention relates to a carriage for a magnetic disk device having a head arm stacked structure.
従来、ヘツドアーム積層構造の磁気デイスク装
置は、例えば第３図に示すようにハウジング１と
カバー２で密閉され、その内部に複数のデイスク
円板３を積層したスピンドル４が、ベアリング５
を介しハウジング１に固定されている。該スピン
ドル４は下部にあるモータ６により回転される。
又、デイスク円板３の情報をリード／ライトする
為のキヤリツジは、シリンダ８に取付けられたヘ
ツドアーム７が、ボイスコイルモータ（VCM）
９により駆動される。なお、シリンダ８の上下は
ベアリング１１を介し軸１０に支持されている。
なお、１２はヘツドアーム７をシリンダ８に固定
する為のアーム押えである。 Conventionally, a magnetic disk device with a head arm stacked structure is sealed with a housing 1 and a cover 2 as shown in FIG.
It is fixed to the housing 1 via. The spindle 4 is rotated by a motor 6 located at the bottom.
In addition, the carriage for reading/writing information on the disk disk 3 has a head arm 7 attached to a cylinder 8 that is connected to a voice coil motor (VCM).
9. Note that the cylinder 8 is supported by a shaft 10 through bearings 11 at the top and bottom.
Note that 12 is an arm holder for fixing the head arm 7 to the cylinder 8.
シリンダ８はシーク速度を速くする為、軽くイ
ナーシヤが小さいものが必要で、さらにヘツドの
正確な位置決めの為、振動に対し強くなければな
らない。従つて、シリンダ８はヤング率の大きい
線膨脹係数の小さいものが望ましい。例えば、ス
テンレス（SUS）等のヤング率の高い材質のも
の。 The cylinder 8 must be lightweight and have small inertia in order to increase the seek speed, and must also be strong against vibrations in order to accurately position the head. Therefore, it is desirable that the cylinder 8 has a large Young's modulus and a small coefficient of linear expansion. For example, materials with high Young's modulus such as stainless steel (SUS).
又、ヘツドアーム７は軸１０から離れた点に重
心がある為、イナーシヤの影響の少ない軽い材質
が望ましい。例えば、マグネシユーム（Mg）、
アルミニユーム（Al）等の軽い材質のものが挙
げられる。 Furthermore, since the center of gravity of the head arm 7 is located away from the shaft 10, it is desirable to use a light material that is less affected by inertia. For example, magnesium (Mg),
Examples include light materials such as aluminum (Al).
上記のようにヘツドアーム７と、その軸となる
シリンダ８の材質は異なることが望まれるが、磁
気デイスク装置の温度変化により、ヘツドアーム
７とシリンダ８の材質の相違に基づく線膨脹係数
の違いから、ヘツドアーム７の伸びが大きく、ヘ
ツドアーム７が過大な力で押え付けられ、ヘツド
アーム７に歪が生じオフトラツクの原因となる。 As mentioned above, it is desirable that the materials of the head arm 7 and the cylinder 8, which is its axis, are different; however, due to temperature changes in the magnetic disk device, differences in linear expansion coefficients due to differences in the materials of the head arm 7 and cylinder 8 may occur. The extension of the head arm 7 is large, and the head arm 7 is pressed down with excessive force, causing distortion in the head arm 7 and causing off-track.
そこで、イナーシヤが小さく、かつ振動に強い
構造でありながら、温度変化によるオフトラツク
のないキヤリツジが必要とされる。 Therefore, there is a need for a carriage that has a structure that has low inertia and is resistant to vibration, but that does not suffer from off-track due to temperature changes.
第４図は従来のキヤリツジを説明する図であ
る。
FIG. 4 is a diagram illustrating a conventional carriage.
第４図は第３図のキヤリツジ部分を示し、１０
は軸、８はシリンダ、７はヘツドアーム、９は
VCM、１１はベアリング、１２はアーム押え、
１３はネジである。 Figure 4 shows the carriage part of Figure 3, with 10
is the shaft, 8 is the cylinder, 7 is the head arm, 9 is the
VCM, 11 is bearing, 12 is arm holder,
13 is a screw.
従来のキヤリツジはSUS等のヤング率の高い
材質のシリンダ８に、アルミニユーム（Al）、マ
グネシユーム（Mg）等の軽い材質のヘツドアー
ム７を積層しており、比較的剛性のあるアーム押
え１２によつてヘツドアーム７を押える構造であ
る。 A conventional carriage has a cylinder 8 made of a material with a high Young's modulus such as SUS, and a head arm 7 made of a light material such as aluminum (Al) or magnesium (Mg). It has a structure that holds down the head arm 7.
従来のキヤリツジは、シリンダ８とヘツドアー
ム７の材質が異なる為、線膨脹係数の違いから
（Mgヘツドアームの線膨脹係数はSUSシリンダ
の約1.6倍）、磁気デイスク装置の温度変化によつ
てヘツドアーム７が矢印ａの力が働き、アーム押
え１２は矢印ｂのような力が働くことにより、ヘ
ツドアーム７のクランプ部分Ａに余分な力（温度
変化40°で約350Kgの力）が生じ、ヘツドアーム７
のクランプ部分が圧縮変形される（ヘツドアーム
７の沈み量10μm程度）。これによつてヘツドの位
置ずれが生じ、オフトラツクが発生するという問
題点があつた。
In conventional carriages, the cylinder 8 and the head arm 7 are made of different materials, and due to the difference in linear expansion coefficient (the linear expansion coefficient of the Mg head arm is approximately 1.6 times that of the SUS cylinder), the head arm 7 may change due to temperature changes in the magnetic disk device. The force of arrow a acts, and the force of arrow b acts on the arm presser 12, causing an extra force (approx. 350 kg force at a temperature change of 40°) to the clamp portion A of the head arm 7, which causes the head arm 7 to
The clamp portion of the head arm 7 is compressed and deformed (the amount of depression of the head arm 7 is about 10 μm). This caused a problem in that the head was misaligned and off-track occurred.
上記問題点は本考案により第１図の本考案の原
理図に示す如く、軸１０の周囲にベアリングを介
し回動可能に支持される線膨張係数の小なる材質
のシリンダの周囲に、線膨張係数の大なる材質の
複数のヘツドアームのクランプ部分が積層され、
積層上部のクランプ部分がアーム押えでシリンダ
に固定される磁気デイスク装置のキヤリツジにお
いて、軸１０に中心孔が挿入されるアーム押え１
２は環状のバネ性を有する形状で環状中間部はネ
ジ１３でシリンダ上端面に固定され、環状外周部
が下方に作用する弾性力で積層されたヘツドアー
ムの最上のクランプ部分を押下し、積層されたヘ
ツドアームをシリンダに固定することを特徴とす
る磁気デイスク装置のキヤリツジによつて解決さ
れる。
The above problem has been solved by the present invention, as shown in the principle diagram of the present invention in FIG. Clamp parts of multiple head arms made of materials with large coefficients are laminated,
An arm holder 1 in which a center hole is inserted into a shaft 10 in a magnetic disk drive carriage in which a clamp portion at the top of the stack is fixed to a cylinder by an arm holder.
2 has an annular springy shape, and the annular intermediate part is fixed to the upper end surface of the cylinder with a screw 13, and the annular outer peripheral part pushes down the uppermost clamp part of the stacked head arms with the elastic force acting downward, and the stacked head arms are stacked. The present invention is solved by a magnetic disk drive carriage characterized by having a fixed head arm fixed to a cylinder.
即ち、アーム押え１２にバネ性を持たせたこと
によつて、磁気デイスク装置の温度変化によりヘ
ツドアーム７とシリンダ８の間に熱膨脹の差が生
じた場合でも、アーム押え１２によるヘツドアー
ム７のクランプ部分を圧縮変形させることも少な
く、かつ矢印Ｓのようなアーム押え外周部分のた
わみによつて、ヘツドアーム７に生じる矢印ａの
応力が吸収される。その結果ヘツドアーム７の変
形を押えることが出来、オフトラツクを最小限に
押えることが出来る。
That is, by providing the arm holder 12 with spring properties, even if a difference in thermal expansion occurs between the head arm 7 and the cylinder 8 due to a temperature change in the magnetic disk device, the clamping portion of the head arm 7 by the arm holder 12 will remain stable. The stress shown by the arrow a generated in the head arm 7 is absorbed by the bending of the outer peripheral portion of the arm presser as shown by the arrow S. As a result, deformation of the head arm 7 can be suppressed, and off-track can be suppressed to a minimum.
第２図は本考案の実施例を説明する図である。
なお、全図を通し同一符号は同一対象物である。
FIG. 2 is a diagram illustrating an embodiment of the present invention.
Note that the same reference numerals represent the same objects throughout the figures.
第２図は本考案のアーム押えの断面図を示す。
実施例では、アーム押え１２をアルミ（Al）等
のヤング率の小さい材質で、板厚Ｔ＝７mm、外周
部に丸みＲを持たせるように凹部（直径40φmm×
深さ13mm）を設け、さらにｈ＝４mmとしバネ性を
持たせた環状とする。なおアーム押えには軸１０
が挿入される穴（直径26φmm）を中央に、アーム
押え１２を締付けるネジ用穴１４を設け、第１図
の如きヘツドアーム積層構造では、アーム押え１
２はネジ用穴１４にさし込まれたネジ１３でシリ
ンダ８に固定され、その外周部が下方への弾性力
でシリンダに積層したヘツドアーム７をシリンダ
に固定する。 FIG. 2 shows a sectional view of the arm presser of the present invention.
In the embodiment, the arm presser 12 is made of a material with a small Young's modulus such as aluminum (Al), has a thickness T of 7 mm, and has a concave portion (diameter 40 mm x
A depth of 13 mm) is provided, and an annular shape with h=4 mm is provided with spring properties. In addition, the arm presser has shaft 10.
A screw hole 14 for tightening the arm presser 12 is provided in the center of the hole (diameter 26 mm) into which the arm presser 12 is inserted.
2 is fixed to the cylinder 8 by a screw 13 inserted into a screw hole 14, and the head arm 7 stacked on the cylinder is fixed to the cylinder by the downward elastic force of its outer circumference.
上記ヘツドアーム積層構造において、５本のネ
ジ１３により固定されたアーム押えによるヘツド
アーム７に加わる荷重は約1000Kgである。磁気デ
イスク装置の温度変化（Δt＝40℃）でのアーム
押えによる荷重の増加は、従来のヤング率の高い
材質のSUS等で剛性を有する形状では350Kgであ
つたが、実施例ではヘツドアーム７と同じように
ヤング率の低いアルミ等の材質でしかもバネ性を
有する形状である為50Kgであつた。その結果、ヘ
ツドアーム７のクランプ部分の圧縮変形が少なく
なつた。さらにアーム押え１２のたわみによつて
応力が吸収されることにより、ヘツドアーム７の
変形が押えられ、従来と比較して1/2〜1/3のオフ
トラツク量になつた。 In the head arm laminated structure described above, the load applied to the head arm 7 by the arm presser fixed by the five screws 13 is about 1000 kg. The increase in load caused by holding the arm due to a temperature change in the magnetic disk device (Δt = 40°C) was 350 kg for a conventional rigid shape made of a material with a high Young's modulus such as SUS, but in this example Similarly, it was made of a material such as aluminum with a low Young's modulus and had a springy shape, so it weighed 50 kg. As a result, the compression deformation of the clamp portion of the head arm 7 is reduced. Furthermore, as the stress is absorbed by the bending of the arm presser 12, the deformation of the head arm 7 is suppressed, and the off-track amount is reduced to 1/2 to 1/3 compared to the conventional one.
以上説明したように、本考案によればアーム押
えにバネ性を持たせ、磁気デイスク装置の温度変
化による熱応力を吸収することによつて、イナー
シヤが小さく振動に強い構造としながら、温度変
化によるオフトラツクを防止することが可能とな
つた。
As explained above, according to the present invention, the arm retainer has spring properties and absorbs thermal stress caused by temperature changes in the magnetic disk device, thereby creating a structure with low inertia and strong vibration resistance. It became possible to prevent off-track.
第１図は本考案の原理を説明する図、第２図は
本考案の実施例を説明する図、第３図は従来の磁
気デイスク装置を説明する図、第４図は従来のキ
ヤリツジを説明する図である。
図において、７はヘツドアーム、８はシリン
ダ、９はVCM、１０は軸、１１はベアリング、
１２はアーム押え、１３はネジ、１４はネジ用穴
を示す。
Figure 1 is a diagram explaining the principle of the present invention, Figure 2 is a diagram explaining an embodiment of the invention, Figure 3 is a diagram explaining a conventional magnetic disk device, and Figure 4 is a diagram explaining a conventional carriage. This is a diagram. In the figure, 7 is a head arm, 8 is a cylinder, 9 is a VCM, 10 is a shaft, 11 is a bearing,
12 is an arm holder, 13 is a screw, and 14 is a screw hole.
Claims (1)
持される線膨張係数の小なる材質のシリンダの周
囲に、線膨張係数の大なる材質の複数のヘツドア
ームのクランプ部分が積層され、積層上部のクラ
ンプ部分がアーム押えでシリンダに固定される磁
気デイスク装置のキヤリツジにおいて、軸１０に
中心孔が挿入されるアーム押え１２は環状のバネ
性を有する形状で環状中間部はネジ１３でシリン
ダ上端面に固定され、環状外周部が下方に作用す
る弾性力で積層されたヘツドアームの最上のクラ
ンプ部分を押下し、積層されたヘツドアームをシ
リンダに固定することを特徴とする磁気デイスク
装置のキヤリツジ。 Clamp portions of a plurality of head arms made of a material with a large coefficient of linear expansion are stacked around a cylinder made of a material with a small coefficient of linear expansion that is rotatably supported around the shaft 10 via a bearing, and a clamp on the top of the stack is stacked. In the carriage of a magnetic disk device in which a portion is fixed to a cylinder by an arm holder, the arm holder 12 whose central hole is inserted into the shaft 10 has an annular springy shape, and the annular intermediate part is fixed to the upper end surface of the cylinder with a screw 13. What is claimed is: 1. A carriage for a magnetic disk device, characterized in that the annular outer periphery presses down the uppermost clamp portion of the stacked head arms with an elastic force acting downward, thereby fixing the stacked head arms to the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986032403U JPH0548298Y2 (en) | 1986-03-06 | 1986-03-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986032403U JPH0548298Y2 (en) | 1986-03-06 | 1986-03-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62161362U JPS62161362U (en) | 1987-10-14 |
| JPH0548298Y2 true JPH0548298Y2 (en) | 1993-12-22 |
Family
ID=30839047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986032403U Expired - Lifetime JPH0548298Y2 (en) | 1986-03-06 | 1986-03-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0548298Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2570103B2 (en) * | 1993-06-22 | 1997-01-08 | 日本電気株式会社 | Carriage structure of magnetic disk drive |
| US20050264943A1 (en) * | 2002-05-09 | 2005-12-01 | Susumu Tsuchiya | Hard disk driving carriage and method of producing the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57201661U (en) * | 1981-06-16 | 1982-12-22 |
-
1986
- 1986-03-06 JP JP1986032403U patent/JPH0548298Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62161362U (en) | 1987-10-14 |
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