JPH0817011B2 - Positioning mechanism for swing arm of magnetic disk device - Google Patents
Positioning mechanism for swing arm of magnetic disk deviceInfo
- Publication number
- JPH0817011B2 JPH0817011B2 JP60213203A JP21320385A JPH0817011B2 JP H0817011 B2 JPH0817011 B2 JP H0817011B2 JP 60213203 A JP60213203 A JP 60213203A JP 21320385 A JP21320385 A JP 21320385A JP H0817011 B2 JPH0817011 B2 JP H0817011B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- inner ring
- magnetic disk
- positioning mechanism
- swing arm
- 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
Landscapes
- Moving Of Heads (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、磁気デイスク装置の揺動アームの位置決め
機構に関するものである。The present invention relates to a positioning mechanism for a swing arm of a magnetic disk device.
一般に、揺動式アームの位置決め機構を有する磁気デ
イスク装置を第2図に示す。第2図中、アーム1は磁気
ヘツド(図示せず)を有し、軸受6を介して中心軸2の
回りを揺動する。コイル5はアーム1と一体で磁気回路
4中に設置されている。上部基板3aおよび下部基板3bは
中心軸2および磁気回路4を支持している。従つて、コ
イル5に電流を流すと、磁気回路4に設けられている永
久磁石の磁界により、アーム1は軸受6を介して中心軸
2の回りに揺動して、磁気ヘツドが磁気デイスク(図示
せず)に対し所定位置に位置決めされる。Generally, FIG. 2 shows a magnetic disk device having a swinging arm positioning mechanism. In FIG. 2, the arm 1 has a magnetic head (not shown), and swings around the central axis 2 via a bearing 6. The coil 5 is installed in the magnetic circuit 4 integrally with the arm 1. The upper substrate 3a and the lower substrate 3b support the central axis 2 and the magnetic circuit 4. Therefore, when a current is applied to the coil 5, the arm 1 swings around the central axis 2 via the bearing 6 by the magnetic field of the permanent magnet provided in the magnetic circuit 4, and the magnetic head (magnetic disk) (Not shown) is positioned at a predetermined position.
ここで、軸受6の内輪6a(第3図参照)は中心軸2に
対し若干の隙間を必然的に有しているため、そのままに
しておくと、内輪6a及び中心軸2間でガタを生じ、上記
位置決め精度が悪くなる。Here, since the inner ring 6a (see FIG. 3) of the bearing 6 necessarily has a slight gap with respect to the center shaft 2, if it is left as it is, backlash occurs between the inner ring 6a and the center shaft 2. However, the above positioning accuracy becomes poor.
そこで、従来は、第2図,第3図の如く、中心軸2の
軸受6と対応する高さ位置に軸直角方向孔2aを設けて、
スペーサ7,コイルバネ8を収納し、コイルバネ8により
スペーサ7を内輪6aに対し半径方向へ付勢して半径方向
荷重を加え、その反力で相対的に中心軸2の一部を内輪
6aに圧接させる。これにより、内輪6aに対し二点支持さ
せて内輪6a及び中心軸2間のガタを除去して、上記位置
決め精度に対処させていた。Therefore, conventionally, as shown in FIGS. 2 and 3, a hole 2a perpendicular to the shaft is provided at a height position corresponding to the bearing 6 of the central shaft 2,
The spacer 7 and the coil spring 8 are housed, and the coil spring 8 urges the spacer 7 in the radial direction against the inner ring 6a to apply a load in the radial direction, and the reaction force relatively moves a part of the central shaft 2 to the inner ring.
Press against 6a. Thereby, the inner ring 6a is supported at two points to remove the play between the inner ring 6a and the central shaft 2, thereby coping with the positioning accuracy.
上述した従来の磁気デイスク装置の揺動アームの位置
決め機構では、中心軸2と軸受6の内輪6aとの隙間を二
点で固定する構造となつているのでアーム1の揺動方向
の支持がなく構造的に不安定であるため、揺動方向に関
して構造的不安定に起因する振動の周波数成分が表われ
良好な揺動特性が得られないという問題点がある。In the conventional rocking arm positioning mechanism of the magnetic disk device described above, the structure in which the gap between the central shaft 2 and the inner ring 6a of the bearing 6 is fixed at two points does not support the arm 1 in the rocking direction. Since it is structurally unstable, there is a problem in that a frequency component of vibration due to structural instability appears in the rocking direction and good rocking characteristics cannot be obtained.
本発明は上記問題点を解決したものであり、複数の磁
気ヘツドを実装したアーム群を回転させる軸受と、前記
軸受を支持する中心軸と、前記中心軸に設けられ、スペ
ーサを付勢して前記軸受の内輪の所定部に圧接させて半
径方向荷重を加え、相対的に前記中心軸の前記軸受の内
輪の所定部の略反対部に圧接させるバネ手段と、前記ア
ーム群に一体的に組付けられたコイルと、前記コイルに
生ずる磁界と反発作用をつくる永久磁石を有する磁気回
路と、前記中心軸および前記磁気回路を支持する上部基
板および下部基板とを備える磁気デイスク装置の揺動ア
ームの位置決め機構において、前記中心軸上の前記バネ
手段の付勢方向と反対側で、かつ前記軸受と対応する位
置に切欠部を設けてなり、該切欠部を構成する面が上記
中心軸の中心線を含む面の一つと平行に形成されてなる
ものである。The present invention has solved the above-mentioned problems, and a bearing that rotates an arm group having a plurality of magnetic heads mounted thereon, a central shaft that supports the bearing, and a central shaft that is provided on the central shaft and urges a spacer. A spring means for press-contacting a predetermined portion of the inner ring of the bearing to apply a radial load and relatively press-contact to a portion of the center shaft substantially opposite to the predetermined portion of the inner ring of the bearing, and integrally assembled to the arm group. Of a swing arm of a magnetic disk device including a coil attached thereto, a magnetic circuit having a permanent magnet that repels a magnetic field generated in the coil, and an upper substrate and a lower substrate that support the central axis and the magnetic circuit. In the positioning mechanism, a notch portion is provided on the center shaft on the side opposite to the urging direction of the spring means and at a position corresponding to the bearing, and a surface forming the notch portion has a center line of the center axis. Including It is made of formed parallel to the one plane.
次に、その実施例を第1図と共に説明する。 Next, the embodiment will be described with reference to FIG.
第1図は本発明に係る磁気デイスク装置の揺動アーム
の位置決め機構の一実施例を示す横断図であり、同図
中、第3図と同一部分には同一符号を付す。FIG. 1 is a cross-sectional view showing an embodiment of a positioning mechanism for a swing arm of a magnetic disk device according to the present invention, in which the same parts as those in FIG. 3 are designated by the same reference numerals.
第1図中、本実施例では、中心軸2の軸直角方向孔2a
と反対側位置で、かつ軸受6と対応する位置に、軸受6
の内輪6a長さより大なる長さの切欠部2b(第2図中二点
鎖線で参考的に示す)を設けており、該切欠部2bを構成
する面は上記中心軸2の中心線を含む面の一つと平行に
形成されてなる。In FIG. 1, in the present embodiment, a hole 2a perpendicular to the axis of the central axis 2 is formed.
At a position opposite to the bearing 6 and at a position corresponding to the bearing 6.
Of the inner ring 6a is provided with a notch 2b (reference is shown by a chain double-dashed line in FIG. 2) having a length greater than that of the inner ring 6a, and the surface forming the notch 2b includes the center line of the central axis 2. It is formed parallel to one of the faces.
これによれば、コイルバネ8によりスペーサ7を内輪
6aに付勢的に当接させたとき、その反力で中心軸2は相
対的に内輪6aに圧接されるが、実際には切欠部2bの両端
が内輪6aに圧接される。従つて、全体として、スペーサ
7,切欠部2bの両端の三点支持となり、アーム1は安定に
位置決めされる。従つて、アーム1は構造的に安定とな
り、良好な振動特性を得ることができる。According to this, the spacer 7 is attached to the inner ring by the coil spring 8.
When the core shaft 2 is urged against the inner ring 6a by the reaction force, the center shaft 2 is relatively pressed against the inner ring 6a, but actually both ends of the notch 2b are pressed against the inner ring 6a. Therefore, as a whole, the spacer
7. The arm 1 is stably positioned by supporting three points on both ends of the notch 2b. Therefore, the arm 1 is structurally stable, and good vibration characteristics can be obtained.
尚上記切欠部2bは、上方軸受6のみでなく、下方軸受
6に対応させて更に設けてもよい。The notch 2b may be provided not only in the upper bearing 6 but also in the lower bearing 6.
以上説明したように、本発明は、中心軸上の軸受部に
中心軸の軸受と対応する部分に切欠部を設けてなり、該
切欠部を構成する面が上記中心軸の中心線を含む面の一
つと平行に形成されてなることにより、中心軸上の軸直
角方向孔に収納したコイルバネによりスペーサーを介し
て軸受の内輪に半径方向荷重を加えたとき中心軸と軸受
の内輪が三点で支持されるため、構造的に安定し、か
つ、良好な振動特性を有することができるという効果が
あり、かつ切欠部の表面が平坦であるため、加工が容易
で、支持位置も正確に出しやすいという効果がある。As described above, according to the present invention, the bearing portion on the central shaft is provided with the cutout portion at a portion corresponding to the bearing of the central shaft, and the surface forming the cutout portion is a surface including the center line of the central shaft. When the radial load is applied to the inner ring of the bearing through the spacer by the coil spring housed in the hole perpendicular to the axis on the central axis, the central axis and the inner ring of the bearing are at three points. Since it is supported, it has the effect of being structurally stable and having good vibration characteristics. Moreover, the flat surface of the notch makes it easy to process, and it is also easy to accurately position the support. There is an effect.
第1図は本発明に係る磁気デイスク装置の揺動アームの
位置決め機構の一実施例を示す横断図、第2図及び第3
図は夫々従来の磁気デイスク装置の揺動アームの位置決
め機構の一例を適用した該磁気デイスク装置の縦断図、
及び第2図中III-III線に沿う横断矢視図である。 1……アーム、2……中心軸 2a……軸直角方向孔、2b……切欠部 3a……上部基板、3b……下部基板 4……磁気回路、5……コイル 6……軸受、7……スペーサー 8……コイルバネFIG. 1 is a cross-sectional view showing an embodiment of a positioning mechanism of a swing arm of a magnetic disk device according to the present invention, FIG. 2 and FIG.
FIG. 1 is a vertical cross-sectional view of a magnetic disk device to which an example of a positioning mechanism for a swing arm of a conventional magnetic disk device is applied,
FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 ... Arm, 2 ... Center axis 2a ... Hole at right angles to axis, 2b ... Notch 3a ... Upper substrate, 3b ... Lower substrate 4 ... Magnetic circuit, 5 ... Coil 6 ... Bearing, 7 …… Spacer 8 …… Coil spring
Claims (1)
転させる軸受と、前記軸受を支持する中心軸と、前記中
心軸に設けられ、スペーサを付勢して前記軸受の内輪の
所定部に圧接させて半径方向荷重を加え、相対的に前記
中心軸の前記軸受の内輪の所定部の略反対部に圧接させ
るバネ手段と、前記アーム群に一体的に組付けられたコ
イルと、前記コイルに生ずる磁界と反発作用をつくる永
久磁石を有する磁気回路と、前記中心軸および前記磁気
回路を支持する上部基板および下部基板とを備える磁気
ディスク装置の揺動アームの位置決め機構において、前
記中心軸上の前記バネ手段の付勢方向と反対側で、かつ
前記軸受と対応する位置に切欠部を設けてなり、該切欠
部を構成する面が上記中心軸の中心線を含む面の一つと
平行に形成されてなることを特徴とする磁気ディスク装
置の揺動アームの位置決め機構。1. A bearing for rotating an arm group having a plurality of magnetic heads mounted thereon, a central shaft for supporting the bearing, and a central shaft provided on the central shaft for biasing a spacer to a predetermined portion of an inner ring of the bearing. Spring means for pressing and applying a radial load to relatively press a portion of the center shaft substantially opposite to a predetermined portion of the inner ring of the bearing; a coil integrally assembled to the arm group; In a positioning mechanism of a swing arm of a magnetic disk device, which comprises a magnetic circuit having a permanent magnet that creates a repulsive action with a magnetic field generated in the central axis, and an upper substrate and a lower substrate supporting the central axis and On the side opposite to the urging direction of the spring means and at a position corresponding to the bearing, and the surface forming the notch is parallel to one of the surfaces including the center line of the central axis. Formed Positioning mechanism of the swing arm of the magnetic disk apparatus according to claim Rukoto.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60213203A JPH0817011B2 (en) | 1985-09-26 | 1985-09-26 | Positioning mechanism for swing arm of magnetic disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60213203A JPH0817011B2 (en) | 1985-09-26 | 1985-09-26 | Positioning mechanism for swing arm of magnetic disk device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6273466A JPS6273466A (en) | 1987-04-04 |
JPH0817011B2 true JPH0817011B2 (en) | 1996-02-21 |
Family
ID=16635242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60213203A Expired - Lifetime JPH0817011B2 (en) | 1985-09-26 | 1985-09-26 | Positioning mechanism for swing arm of magnetic disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0817011B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62257677A (en) * | 1986-05-01 | 1987-11-10 | Hitachi Electronics Eng Co Ltd | Swing arm type read/write head |
JP2569098B2 (en) * | 1987-12-25 | 1997-01-08 | 株式会社日立製作所 | Head assembly support structure for magnetic disk drive |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58111158A (en) * | 1981-12-23 | 1983-07-02 | Hitachi Ltd | Magnetic disc device |
JPS5994275A (en) * | 1982-11-22 | 1984-05-30 | Hitachi Ltd | Positioning mechanism of magnetic head |
JPS60140573A (en) * | 1983-12-28 | 1985-07-25 | Hitachi Ltd | Positioning mechanism of magnetic head |
-
1985
- 1985-09-26 JP JP60213203A patent/JPH0817011B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6273466A (en) | 1987-04-04 |
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