JPH0714359A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPH0714359A
JPH0714359A JP15094293A JP15094293A JPH0714359A JP H0714359 A JPH0714359 A JP H0714359A JP 15094293 A JP15094293 A JP 15094293A JP 15094293 A JP15094293 A JP 15094293A JP H0714359 A JPH0714359 A JP H0714359A
Authority
JP
Japan
Prior art keywords
circuit board
printed circuit
magnetic disk
base plate
sealed container
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.)
Withdrawn
Application number
JP15094293A
Other languages
Japanese (ja)
Inventor
Norihisa Tabei
徳久 田部井
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.)
NEC Ibaraki Ltd
Original Assignee
NEC Ibaraki Ltd
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 NEC Ibaraki Ltd filed Critical NEC Ibaraki Ltd
Priority to JP15094293A priority Critical patent/JPH0714359A/en
Publication of JPH0714359A publication Critical patent/JPH0714359A/en
Withdrawn legal-status Critical Current

Links

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  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To prevent the generation of a read-out error of the data recorded in a magnetic disk. CONSTITUTION:A washer with protrusion or a spring washer is interposed between a base plate and a printed circuit board which constitute a hermetically sealed container of a disk enclosure part. By this arrangement, a grounding part arranged on the fixed part between the printed circuit board 5 and base plate 7 is kept in the perfect state by the washer 2 with protrusion or the spring washer, even when the dimensions of the printed circuit board 5, etc., are changed with the variation of ambient temperature or when a residual stress at the time of fixing the printed board 5 to the base plate 7 is changed.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は、磁気ヘッドと磁気ディ
スクとを収容する密封容器と、密封容器に固定されたプ
リント基板とを有する磁気ディスク装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device having a hermetically sealed container for housing a magnetic head and a magnetic disk, and a printed circuit board fixed to the hermetically sealed container.

【0002】[0002]

【従来の技術】磁気ディスク装置は、大別して磁気ヘッ
ドや磁気ディスク等の機構部品によって構成されるディ
スクエンクロージャ部と、ICやプリント基板等の電気
部品によって構成される回路部との二つの部分を有して
いる。
2. Description of the Related Art A magnetic disk device is roughly divided into two parts, a disk enclosure part composed of mechanical parts such as a magnetic head and a magnetic disk, and a circuit part composed of electric parts such as an IC and a printed circuit board. Have

【0003】このような磁気ディスク装置のうち、特に
小型の磁気ディスク装置は、IC等の電子素子を実装し
ているプリント基板をディスクエンクロージャ部のベー
スプレートの外面に直接固定し、プリント基板の接地部
をプリント基板とベースプレートとの固定個所に設ける
ことにより、ディスクエンクロージャ部と回路部とを合
わせた磁気ディスク装置全体の小型化を図っている。
Among such magnetic disk devices, particularly small magnetic disk devices have a printed circuit board on which electronic elements such as ICs are mounted directly fixed to the outer surface of the base plate of the disk enclosure section, and the grounded section of the printed circuit board. Is provided at a fixed position between the printed circuit board and the base plate, so that the entire magnetic disk device including the disk enclosure part and the circuit part is downsized.

【0004】[0004]

【発明が解決しようとする課題】上述したような従来の
磁気ディスク装置は、環境状態の変化や磁気ディスク装
置自身が発生する熱等による温度上昇やプリント基板を
ベースプレートに固定するときの残留応力等の影響によ
り、プリント基板とベースプレートとの固定個所に設け
た接地部に隙間ができ、接地が不完全になってプリント
基板とベースプレートとの間のインピーダンスが不整合
となるため、磁気ディスクに記録したデータが読出せな
くなることがあるという問題点を有している。
In the conventional magnetic disk device as described above, the temperature rise due to changes in environmental conditions, heat generated by the magnetic disk device itself, residual stress when fixing the printed circuit board to the base plate, etc. Due to the influence of, a gap is created in the grounding part provided at the fixed point between the printed circuit board and the base plate, the grounding is incomplete, and the impedance between the printed circuit board and the base plate becomes inconsistent. There is a problem that data may not be read.

【0005】[0005]

【課題を解決するための手段】本発明の磁気ディスク装
置は、磁気ヘッドと磁気ディスクとを収容する密封容器
と、前記密封容器に固定されたプリント基板とを備え、
前記密封容器と前記プリント基板との固定個所の少なく
とも1個所を接地部とした磁気ディスク装置において、
前記接地部の少なくとも1個所の固定個所の前記密封容
器と前記プリント基板との間に突起付きワッシャまたは
ばねワッシャを介装したものである。
A magnetic disk device according to the present invention comprises a hermetically sealed container for housing a magnetic head and a magnetic disk, and a printed circuit board fixed to the hermetically sealed container.
In a magnetic disk device in which at least one of the fixed parts of the hermetically sealed container and the printed circuit board is a ground part,
A washer with a protrusion or a spring washer is interposed between the sealed container and the printed circuit board at at least one fixed portion of the ground portion.

【0006】[0006]

【実施例】次に、本発明の実施例について図面を参照し
て説明する。
Embodiments of the present invention will now be described with reference to the drawings.

【0007】図1は図2の実施例のA部の詳細を示す断
面図、図2は本発明の第一の実施例の外観を示す斜視図
である。
FIG. 1 is a sectional view showing the details of the portion A of the embodiment shown in FIG. 2, and FIG. 2 is a perspective view showing the appearance of the first embodiment of the present invention.

【0008】図1および図2において、磁気ヘッドと磁
気ディスク(何れも図示省略)とを収容するディスクエ
ンクロージャ部の密封容器を構成するベースプレート7
の外面には、円柱状の支柱6が設けてある。支柱6には
防振ゴム3が取付けられており、フレーム4は、防振ゴ
ム3に挟持されて支柱6に保持されている。プリント基
板5は、支柱6を貫通して防振ゴム3とベースプレート
7との間に装着されており、プリント基板5とベースプ
レート7の間には、突起付きワッシャ8が設けてある。
In FIGS. 1 and 2, a base plate 7 which constitutes a hermetically sealed container of a disk enclosure portion for accommodating a magnetic head and a magnetic disk (neither shown).
A columnar pillar 6 is provided on the outer surface of the. An anti-vibration rubber 3 is attached to the column 6, and the frame 4 is sandwiched between the anti-vibration rubber 3 and held by the column 6. The printed circuit board 5 is mounted between the anti-vibration rubber 3 and the base plate 7 by penetrating the support column 6, and a washer 8 with a protrusion is provided between the printed circuit board 5 and the base plate 7.

【0009】支柱6の高さは、防振ゴム3の上面の位置
と同じかそれよりも低くなっている。また、支柱6を貫
通させるためにプリント基板5に設けてある穴の直径
は、支柱6の外径よりも大きくなっている。支柱6の中
心部にはねじ穴が設けてあり、ベースプレート7上に積
載された突起付きワッシャ8およびプリント基板5およ
びフレーム4を含む防振ゴム3は、ワッシャ2を介して
固定ねじ1を支柱6のねじ穴に締付けることによって固
定される。
The height of the support column 6 is the same as or lower than the position of the upper surface of the anti-vibration rubber 3. Further, the diameter of the hole provided in the printed circuit board 5 for penetrating the support column 6 is larger than the outer diameter of the support column 6. A screw hole is provided in the center of the column 6, and a vibration isolation rubber 3 including a washer 8 with a projection, a printed circuit board 5 and a frame 4 mounted on a base plate 7 supports a fixing screw 1 via a washer 2. It is fixed by tightening it in the screw hole of 6.

【0010】このように構成した磁気ディスク装置は、
環境温度の変化によって、防振ゴム3やプリント基板5
の寸法の変化があったり、プリント基板5をベースプレ
ート7に固定するときの残留応力の変化があったときで
も、突起付きワッシャ8により、プリント基板5とベー
スプレート7との固定個所に設けた接地部の状態は完全
な状態に保持されるため、磁気ディスクに記録したデー
タの読出しエラーの発生は防止される。
The magnetic disk drive thus constructed is
Anti-vibration rubber 3 and printed circuit board 5 depending on the change in environmental temperature
Even when there is a change in the dimensions of the printed circuit board 5 or when there is a change in the residual stress when fixing the printed circuit board 5 to the base plate 7, the washer 8 with a protrusion provides a grounding portion provided at a fixed position between the printed circuit board 5 and the base plate 7. Since the state of 1 is maintained in a perfect state, the occurrence of a read error of the data recorded on the magnetic disk is prevented.

【0011】図3は図4の実施例のB部の詳細を示す断
面図、図4は本発明の第二の実施例の外観を示す斜視図
である。
FIG. 3 is a sectional view showing the details of the portion B in the embodiment of FIG. 4, and FIG. 4 is a perspective view showing the appearance of the second embodiment of the present invention.

【0012】図3および図4において、磁気ヘッドと磁
気ディスク(何れも図示省略)とを収容するディスクエ
ンクロージャ部の密封容器を構成するベースプレート1
7の外面には、円柱状の支柱16が設けてある。プリン
ト基板15は、支柱16を貫通してベースプレート7の
上に装着されており、プリント基板15とベースプレー
ト17の間には、ばねワッシャ19が設けてある。
In FIGS. 3 and 4, a base plate 1 which constitutes a hermetically sealed container of a disk enclosure portion for accommodating a magnetic head and a magnetic disk (neither shown).
A columnar support 16 is provided on the outer surface of 7. The printed circuit board 15 is mounted on the base plate 7 by penetrating the columns 16, and a spring washer 19 is provided between the printed circuit board 15 and the base plate 17.

【0013】支柱16の高さは、プリント基板15の上
面の位置と同じかそれよりも低くなっている。また、支
柱16を貫通させるためにプリント基板15に設けてあ
る穴の直径は、支柱16の外径よりも大きくなってい
る。支柱16の中心部にはねじ穴が設けてあり、ベース
プレート17上に積載されたばねワッシャ19およびプ
リント基板15は、ワッシャ12を介して固定ねじ11
を支柱16のねじ穴に締付けることによって固定され
る。
The height of the pillar 16 is the same as or lower than the position of the upper surface of the printed board 15. In addition, the diameter of the hole provided in the printed circuit board 15 for penetrating the pillar 16 is larger than the outer diameter of the pillar 16. A screw hole is provided in the center of the support column 16, and the spring washer 19 and the printed circuit board 15 mounted on the base plate 17 are fixed to each other with the fixing screw 11 through the washer 12.
Is fixed by tightening the screw into the screw hole of the column 16.

【0014】上述のように構成された磁気ディスク装置
の作用および効果は、図2の実施例と同じである。
The operation and effect of the magnetic disk device constructed as described above are the same as those of the embodiment of FIG.

【0015】[0015]

【発明の効果】以上説明したように、本発明の磁気ディ
スク装置は、ディスクエンクロージャ部の密封容器を構
成するベースプレートとプリント基板との間に突起付き
ワッシャまたはばねワッシャを介装することにより、環
境温度の変化によってプリント基板等の寸法の変化があ
ったり、プリント基板をベースプレートに固定するとき
の残留応力の変化があったときでも、突起付きワッシャ
またはばねワッシャよってプリント基板とベースプレー
トとの固定個所に設けた接地部の状態を完全な状態に保
持できるという効果があり、従って磁気ディスクに記録
したデータの読出しエラーの発生を防止できるという効
果がある。
As described above, in the magnetic disk device of the present invention, a washer with a protrusion or a spring washer is interposed between the base plate and the printed circuit board which constitute the hermetically sealed container of the disk enclosure section, and thus the environment is improved. Even if there are changes in the dimensions of the printed circuit board, etc. due to changes in temperature, or changes in the residual stress when fixing the printed circuit board to the base plate, the protruding washer or spring washer can be used to fix the printed circuit board to the base plate. There is an effect that the state of the provided grounding portion can be maintained in a perfect state, and therefore an effect that a read error of the data recorded on the magnetic disk can be prevented.

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

【図1】図2の実施例のA部の詳細を示す断面図であ
る。
FIG. 1 is a cross-sectional view showing details of a portion A of the embodiment shown in FIG.

【図2】本発明の第一の実施例の外観を示す斜視図であ
る。
FIG. 2 is a perspective view showing the outer appearance of the first embodiment of the present invention.

【図3】図4の実施例のB部の詳細を示す断面図であ
る。
FIG. 3 is a sectional view showing details of a B portion of the embodiment of FIG.

【図4】本発明の第二の実施例の外観を示す斜視図であ
る。
FIG. 4 is a perspective view showing an appearance of a second embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1・11 固定ねじ 2・12 ワッシャ 3 防振ゴム 4 フレーム 5・15 プリント基板 6・16 支柱 7・17 ベースプレート 8 突起付きワッシャ 19 ばねワッシャ 1/11 Fixing screw 2/12 Washer 3 Anti-vibration rubber 4 Frame 5/15 Printed circuit board 6/16 Support 7/17 Base plate 8 Washer with protrusion 19 Spring washer

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 磁気ヘッドと磁気ディスクとを収容する
密封容器と、前記密封容器に固定されたプリント基板と
を備え、前記密封容器と前記プリント基板との固定個所
の少なくとも1個所を接地部とした磁気ディスク装置に
おいて、前記接地部の少なくとも1個所の固定個所の前
記密封容器と前記プリント基板との間に突起付きワッシ
ャを介装したことを特徴とする磁気ディスク装置。
1. A hermetically sealed container for housing a magnetic head and a magnetic disk, and a printed circuit board fixed to the hermetically sealed container, wherein at least one fixing point between the hermetically sealed container and the printed circuit board is a ground portion. In the above magnetic disk device, a washer with a protrusion is interposed between the printed circuit board and the sealed container at at least one fixed portion of the ground portion.
【請求項2】 磁気ヘッドと磁気ディスクとを収容する
密封容器と、前記密封容器に固定されたプリント基板と
を備え、前記密封容器と前記プリント基板との固定個所
の少なくとも1個所を接地部とした磁気ディスク装置に
おいて、前記接地部の少なくとも1個所の固定個所の前
記密封容器と前記プリント基板との間にばねワッシャを
介装したことを特徴とする磁気ディスク装置。
2. A hermetically sealed container for housing a magnetic head and a magnetic disk, and a printed circuit board fixed to the hermetically sealed container, wherein at least one fixing point between the hermetically sealed container and the printed circuit board is a ground portion. In the above magnetic disk device, a spring washer is interposed between the printed circuit board and the sealed container at at least one fixed portion of the ground portion.
JP15094293A 1993-06-23 1993-06-23 Magnetic disk device Withdrawn JPH0714359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15094293A JPH0714359A (en) 1993-06-23 1993-06-23 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15094293A JPH0714359A (en) 1993-06-23 1993-06-23 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPH0714359A true JPH0714359A (en) 1995-01-17

Family

ID=15507788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15094293A Withdrawn JPH0714359A (en) 1993-06-23 1993-06-23 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPH0714359A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5969901A (en) * 1997-07-31 1999-10-19 International Business Machines Corporation Gasket frame for grounding an actuator flex cable in a disc drive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5969901A (en) * 1997-07-31 1999-10-19 International Business Machines Corporation Gasket frame for grounding an actuator flex cable in a disc drive

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20000905