JPS60223093A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPS60223093A JPS60223093A JP7919984A JP7919984A JPS60223093A JP S60223093 A JPS60223093 A JP S60223093A JP 7919984 A JP7919984 A JP 7919984A JP 7919984 A JP7919984 A JP 7919984A JP S60223093 A JPS60223093 A JP S60223093A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- base plate
- assembly
- plate assembly
- disk device
- 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
Links
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱膨張差に起因する歪をなくした磁気ディス
ク装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device that eliminates distortion caused by differences in thermal expansion.
近年、磁気記憶装置の小型、軽量、高密度化に伴い、磁
気ディスク装置においても、その構成部品の材質の変更
、軽量化、薄型化がはかられ、実装密度の向上に寄与し
ている。In recent years, as magnetic storage devices have become smaller, lighter, and more dense, magnetic disk drives have also undergone changes in the materials of their component parts, and efforts have been made to make them lighter and thinner, contributing to an increase in packaging density.
従来、磁気ディスク装置では、ベースプレート組立(磁
気ディスク及び磁気ヘッドを収納する)に付属部品組立
の一例としてのプリント基板組立を組付けるには、ベー
スプレート組立に設けた複数のボスに対し夫々係止部材
としてのネジによシ複数個所で固着していた。Conventionally, in a magnetic disk drive, in order to assemble a printed circuit board assembly, which is an example of an accessory assembly, to a base plate assembly (accommodating a magnetic disk and a magnetic head), a locking member is attached to each of a plurality of bosses provided on the base plate assembly. The screws were stuck in multiple places.
しかるに、これによれば、装置の環境温度が変化すると
、ベースプレート組立とプリント基板組立との熱膨張係
数の相違による熱膨張差に起因して歪を発生し、所謂サ
ーマルオフトラック等の性能上の悪影響を生ずるという
欠点があった。However, according to this, when the environmental temperature of the device changes, distortion occurs due to the difference in thermal expansion coefficient between the base plate assembly and the printed circuit board assembly, resulting in performance problems such as so-called thermal off-track. It has the disadvantage of causing negative effects.
本発明は、ベースプレート組立及び付属部品組立を係止
部材によシ直接固着するのでなく、その間に弾性部材を
介在させて上記膨張差に起因する歪を吸収させることに
よシ、上記欠点を除去した磁気ディスク装置を提供する
ことを目的とする。The present invention eliminates the above drawbacks by not directly fixing the base plate assembly and accessory parts assembly to the locking member, but by interposing an elastic member between them to absorb the strain caused by the difference in expansion. The purpose of the present invention is to provide a magnetic disk device with the following features.
そのための本発明の構成は、内部に回転可能な磁気ディ
スクと該磁気ディスクに記録再生を行なわしめる磁気ヘ
ッドとを収納するベースプレート組立と、制御回路等の
付属品を有し、該ベースプレート組立に対し複数個所で
夫々係止部材を介して固着される付属部品組立とよシな
シ、上記ベースグレート組立又は付属部品組立と1記係
止部材との間に弾性部材を介在させて、該ベースプレー
ト組立又は付属部品組立と該係止部材との間の熱膨張差
に起因する歪を該弾性部材により吸収するよう構成した
ものである。To achieve this, the configuration of the present invention includes a base plate assembly that houses a rotatable magnetic disk and a magnetic head for recording and reproducing information on the magnetic disk, and accessories such as a control circuit. Instead of an accessory parts assembly that is fixed at a plurality of locations through respective locking members, the base plate assembly is provided by interposing an elastic member between the base plate assembly or the accessory parts assembly and the locking member described in 1 above. Alternatively, the elastic member is configured to absorb strain caused by a difference in thermal expansion between the accessory assembly and the locking member.
次に、本発明の一実施例を図面と共に説明する。 Next, an embodiment of the present invention will be described with reference to the drawings.
第1図囚、 03)は夫々本発明になる磁気ディスク装
置の一実施例の一部切截平面図及び一部切截側面図、第
2図は上記装置の要部の拡大縦断面図である。Figures 1 and 03) are a partially cutaway plan view and a partially cutaway side view of an embodiment of the magnetic disk device according to the present invention, respectively, and Figure 2 is an enlarged vertical sectional view of the main parts of the device. be.
図中、磁気ディスク装置工は、ベースプレート組立2及
び付属部品組立としてのプリント基板組立3よシなる。In the figure, the magnetic disk device assembly consists of a base plate assembly 2 and a printed circuit board assembly 3 as an accessory parts assembly.
ベースプレート組立2は、その内部に同一回転軸4上に
複数の磁気ディスク5が一体回転可能に配され、更に磁
気ディスク5の半径方向に移動自在に配されたヘッド組
立6の磁気ヘッド7が磁気ディスク5に対応されている
。又ベー ゛スプレート組立2は下面に複数のボス部2
aを有している。The base plate assembly 2 has a plurality of magnetic disks 5 rotatably arranged therein on the same rotation shaft 4, and a magnetic head 7 of a head assembly 6 disposed movably in the radial direction of the magnetic disk 5. Compatible with disc 5. Also, the base plate assembly 2 has a plurality of boss parts 2 on the bottom surface.
It has a.
プリント基板組立3はその下面に各種の回路部品3aが
積載され、複数の孔3b(第2図に1個のみ示す)を有
する。このプリント基板組立3をベースプレート組立2
に組付けるには、第1図Q3)、第2図の如く、まず該
ベースプレート組立2の下方で、6孔3bを各ボス一部
2aに対応させて配する。続いて、6孔3bにおいて、
係止部材としてのネジ8をワッシャ9、ボスl01Oリ
ング11を順次介在して、孔3bを介してボス部2a下
端に螺入させる。この場合ネジ8の締付トルクの値は定
められた所定値とされる。The printed circuit board assembly 3 has various circuit components 3a mounted on its lower surface and has a plurality of holes 3b (only one is shown in FIG. 2). This printed circuit board assembly 3 is attached to the base plate assembly 2.
To assemble it, first, as shown in FIG. 1 (Q3) and FIG. 2, six holes 3b are arranged below the base plate assembly 2 so as to correspond to each boss part 2a. Subsequently, in the 6-hole 3b,
A screw 8 as a locking member is screwed into the lower end of the boss portion 2a through the hole 3b with the washer 9, boss 101 and O-ring 11 interposed in this order. In this case, the value of the tightening torque of the screw 8 is set to a predetermined value.
又ボス(0の外径はプリント基板組立3の孔3bの内径
よシ若干量小であシ、半径方向の隙間dを生じており、
しかもボス10の鍔部はOリング11を介してプリント
基板組立3に接している。Also, the outer diameter of the boss (0) is slightly smaller than the inner diameter of the hole 3b of the printed circuit board assembly 3, creating a radial gap d,
Furthermore, the flange of the boss 10 is in contact with the printed circuit board assembly 3 via the O-ring 11.
次に、その効果に付き説明する。環境温度が変化すると
、磁気ディスク装置lのベースプレート組立2及びプリ
ント基板組立3は、夫々第1図(B)中、矢印F1.F
z方向へ熱膨張によシ伸びる。ところが、ベースプレー
ト組立2及びプリント基板組立3は熱膨張係数が異なる
。従って、上記0リング11、隙間dがない場合には、
例えばベースプレート組立2の熱膨張係数の方が大とす
ると、両者2.3間に歪を生じ、装置l全体として上方
が凸状となるよう円弧形に変形する。すると、磁気ヘッ
ド7と磁気ディスク2のトラックとの相対位置がずれて
しまい、正確な記録、再生を行なえない所謂サーマルオ
フトラック状態を生ずる。Next, the effect will be explained. When the environmental temperature changes, the base plate assembly 2 and the printed circuit board assembly 3 of the magnetic disk device 1 move as indicated by the arrows F1. F
It stretches in the z direction due to thermal expansion. However, the base plate assembly 2 and the printed circuit board assembly 3 have different coefficients of thermal expansion. Therefore, if there is no gap d in the O-ring 11,
For example, if the coefficient of thermal expansion of the base plate assembly 2 is larger than that of the base plate assembly 2, distortion will occur between the base plate assembly 2 and the base plate assembly 2, and the entire device 1 will deform into an arcuate shape with the upper part convex. Then, the relative position between the magnetic head 7 and the track of the magnetic disk 2 shifts, resulting in a so-called thermal off-track state in which accurate recording and reproduction cannot be performed.
杏かるに、本発明の場合上記熱膨張差に起因する歪が生
じても、第2図中、ボスIOが孔ab内てOリング11
を弾性変形せしめつつ上記隙間dの範囲内で相対移動し
、結果として上記歪は吸収される。従って、上記サーマ
ルオフトラックを生ずることなく性能を向上しうる。In other words, in the case of the present invention, even if the distortion caused by the above-mentioned thermal expansion difference occurs, the boss IO is not inserted into the hole ab in the O-ring 11 as shown in FIG.
is elastically deformed while relatively moving within the range of the gap d, and as a result, the strain is absorbed. Therefore, performance can be improved without causing the thermal off-track.
以上説明した如く、本発明は、ベースプレート組立及び
付属部品組立を係止部材によシ直接固着するのでなく、
その間に弾性部材を介在させて上記熱膨張差に起因する
歪を吸収させるようにしているため、サーマルオフトラ
ック等の発生を防止し、性能を向上しうる等の利点があ
る。As explained above, the present invention does not directly fix the base plate assembly and accessory parts assembly to the locking member.
Since an elastic member is interposed between them to absorb the strain caused by the difference in thermal expansion, there are advantages such as preventing the occurrence of thermal off-track, etc., and improving performance.
第1図(5)、ω)は夫々本発明になる磁気ディスク装
置の一実施例の一部切截平面図及び一部切截側面図、第
2図は上記装置の要部の拡大縦断面図である。
1・・・磁気ディスク装置
2・・・ベースプレート組立
2a・・・ボス部 3・・・プリント基板組立3b・・
・孔 5・・・磁気ディスク
6・・・ヘッド組立 7・・・磁気ヘッド8・・・ネジ
lO・・・ボス
11・・・0リング
出願人 日本電気株式会社
第1図
(A)
(B)
第2図FIG. 1 (5) and ω) are a partially cutaway plan view and a partially cutaway side view of an embodiment of the magnetic disk device according to the present invention, respectively, and FIG. 2 is an enlarged longitudinal section of the main parts of the device. It is a diagram. 1... Magnetic disk device 2... Base plate assembly 2a... Boss portion 3... Printed circuit board assembly 3b...
- Hole 5... Magnetic disk 6... Head assembly 7... Magnetic head 8... Screw lO... Boss 11... 0 ring Applicant NEC Corporation Figure 1 (A) (B ) Figure 2
Claims (1)
、再生を行なわしめる磁気ヘッドとを収納するベースプ
レート組立と、制御回路等の付属品を有し、該ベースプ
レート組立に対し複数個所で夫々係止部材を介して固着
される付属部品組立とよシなシ、上記ベースプレート組
立又は付属部品組立と上記係止部材との間に弾性部材を
介在させて、該ベースプレート組立又は付属部品組立と
該係止部材との間の熱膨張差に起因する歪を該弾性部材
にょル吸収するよう構成したことを特徴とする磁気ディ
スク装置。It has a base plate assembly that houses a rotatable magnetic disk and a magnetic head for recording and reproducing information on the magnetic disk, and accessories such as a control circuit, and each has a locking member at a plurality of locations for the base plate assembly. An elastic member is interposed between the base plate assembly or the accessory parts assembly and the locking member, and the base plate assembly or the accessory parts assembly and the locking member are fixed together through the base plate assembly or the accessory parts assembly and the locking member. 1. A magnetic disk drive characterized in that the elastic member is configured to absorb strain caused by a difference in thermal expansion between the elastic member and the elastic member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7919984A JPS60223093A (en) | 1984-04-19 | 1984-04-19 | Magnetic disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7919984A JPS60223093A (en) | 1984-04-19 | 1984-04-19 | Magnetic disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60223093A true JPS60223093A (en) | 1985-11-07 |
Family
ID=13683291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7919984A Pending JPS60223093A (en) | 1984-04-19 | 1984-04-19 | Magnetic disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60223093A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6284909A (en) * | 1985-10-07 | 1987-04-18 | Honda Motor Co Ltd | Boring machine |
US4823213A (en) * | 1986-01-17 | 1989-04-18 | Mitsubishi Denki Kabushiki Kaisha | Recording and reproducing disc driving apparatus |
EP0335490A2 (en) * | 1988-03-29 | 1989-10-04 | Magnetic Peripherals Inc. | Disk drive unit |
US5029027A (en) * | 1989-11-13 | 1991-07-02 | Hewlett-Packard Company | Thermally predictable disk drive mechanism |
US5671103A (en) * | 1993-07-30 | 1997-09-23 | Citizen Watch Co., Ltd. | Sealed, dust-proof magnetic disk drive |
KR100505578B1 (en) * | 1997-12-31 | 2005-09-26 | 삼성전자주식회사 | Method of determining location of logical track zero in hard disk drive |
-
1984
- 1984-04-19 JP JP7919984A patent/JPS60223093A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6284909A (en) * | 1985-10-07 | 1987-04-18 | Honda Motor Co Ltd | Boring machine |
US4823213A (en) * | 1986-01-17 | 1989-04-18 | Mitsubishi Denki Kabushiki Kaisha | Recording and reproducing disc driving apparatus |
EP0335490A2 (en) * | 1988-03-29 | 1989-10-04 | Magnetic Peripherals Inc. | Disk drive unit |
EP0335490A3 (en) * | 1988-03-29 | 1990-05-02 | Magnetic Peripherals Inc. | Disk drive unit |
US5029027A (en) * | 1989-11-13 | 1991-07-02 | Hewlett-Packard Company | Thermally predictable disk drive mechanism |
US5671103A (en) * | 1993-07-30 | 1997-09-23 | Citizen Watch Co., Ltd. | Sealed, dust-proof magnetic disk drive |
KR100505578B1 (en) * | 1997-12-31 | 2005-09-26 | 삼성전자주식회사 | Method of determining location of logical track zero in hard disk drive |
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