JPS61979A - Magnetic disc device - Google Patents

Magnetic disc device

Info

Publication number
JPS61979A
JPS61979A JP12138184A JP12138184A JPS61979A JP S61979 A JPS61979 A JP S61979A JP 12138184 A JP12138184 A JP 12138184A JP 12138184 A JP12138184 A JP 12138184A JP S61979 A JPS61979 A JP S61979A
Authority
JP
Japan
Prior art keywords
bimetal
magnetic head
magnetic
disc plate
rotation number
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
Application number
JP12138184A
Other languages
Japanese (ja)
Inventor
Yoshitaka Tanaka
田中　美孝
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 Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12138184A priority Critical patent/JPS61979A/en
Publication of JPS61979A publication Critical patent/JPS61979A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion

Abstract

PURPOSE:To eliminate completely causes of head crush trouble by heating and cuving a bimetal supporting arm of a magnetic head to approximate in to the surface of a magnetic disc when a rotation number detector detects that the rotation number of the magnetic disc exceeds a value sufficient for floating of the magnetic head due to wind pressure. CONSTITUTION:A disc plate 2 is rotated around a revolving shaft 7; and when the rotation number of the disc plate 2 reaches a prescribed value, this state is detected by a rotaion number detector 3, and the detection signal is outputted from the rotation number detector 3 to a bimetal operating circuit 4 through a signal line 8. The bimetal operating circuit 4 supplied power to a part of a bimetal 5 through an electric wire 9 to heat in on a basis of this detection signal. Thus, the bimetal 5 is curved, and a magnetic head 1 stuck to its front end is approximated to the disc plate 2 and is held there while receiving the floating force accompanied with rotation of the disc plate 2, and data can be read from and written on the disc plate 2 by the magnetic head 1.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は磁気ディスク装置の磁気ヘッドの機構に関し、
特に磁気ヘッドの浮上手段に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic head mechanism of a magnetic disk device.
In particular, it relates to floating means for a magnetic head.

〔従来の技術〕[Conventional technology]

従来例磁気ディスク装置では、ディスク板の停止時には
、磁気ヘッドがディスク板に接近していて、高速回転状
態に移行してから、回転に伴う風圧により、磁気ヘソド
ガ浮上する構造である。このために、磁気ヘッドが浮上
すべき時に浮上しなかったり、また浮上状態でなければ
ならない時にディスク板に接触することが起り、ディス
ク板を損傷し、データの読取りを不可能にする欠点があ
った。In a conventional magnetic disk drive, when the disk plate is stopped, the magnetic head is close to the disk plate, and after shifting to a high-speed rotation state, the magnetic head floats due to the wind pressure accompanying the rotation. For this reason, the magnetic head may not fly when it should, or may come into contact with the disk plate when it should be flying, damaging the disk plate and making it impossible to read data. Ta.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明は、前述の欠点を除去するもので、ディスク板の
回転状態では磁気ヘッドが読み取り位置を確実に保持す
る機構を有する磁気ディスク装置を提供することを目的
とする。SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks, and aims to provide a magnetic disk drive having a mechanism in which a magnetic head reliably holds a reading position while the disk plate is rotating.

Ｃ問題点を解決するための手段〕 本発明は、磁気ディスクと、この磁気ディスクの記憶面
に接近して装着された磁気へ・ノドと、この磁気ヘッド
をその一方の端部もしくはその近傍に固着された支持腕
と、この支持腕をその他方の端部もしくは近傍に固着さ
れた支持具とを備えた磁気ディスク装置で、前記の問題
点を解決するための手段として、上記磁気ディスクの回
転速度を検出する手段と、上記支持腕がバイメタルで構
成されたことを特徴とする。Means for Solving Problem C] The present invention provides a magnetic disk, a magnetic head mounted close to the storage surface of the magnetic disk, and a magnetic head mounted at or near one end of the magnetic disk. In order to solve the above problems in a magnetic disk drive including a fixed support arm and a support fixed to the other end of the support arm or in the vicinity thereof, the rotation of the magnetic disk is provided. The device is characterized in that the speed detecting means and the support arm are made of bimetal.

〔作用〕[Effect]

磁気ディスクが磁気ヘッドの風圧浮上に充分な回転数以
上にあることが回転数検出器で検出されるとバイメタル
製支持腕は加熱湾曲されて磁気ディスク面に接近する。When the rotational speed detector detects that the magnetic disk is rotating at a speed higher than that sufficient for the magnetic head to float under wind pressure, the bimetallic support arm is heated and bent to approach the surface of the magnetic disk.

また、回転数が上記回転数より低下し始めると支持腕は
常温状態に復元し磁気ディスク面より離隔する。Furthermore, when the rotational speed begins to drop below the above-mentioned rotational speed, the support arm returns to the normal temperature state and is separated from the magnetic disk surface.

〔実施例〕 以下、本発明実施例装置を図面に基づいて説明する。図
はこの実施例装置の機構を示す模式図である。[Example] Hereinafter, an apparatus according to an example of the present invention will be described based on the drawings. The figure is a schematic diagram showing the mechanism of this embodiment device.

まず、この実施例装置の構成を図面に基づいて説明する
。この実施例装置は、磁気へノド１と、ディスク板２と
、回転数検出器３と、バイメタル動作回路４と、バイメ
タル５と、支持具６と、回転軸７と、信号線８と、電力
線９とを備える。ディスク板２はその中心位置で回転軸
７に固着され、回転数検出器３はディスク板２の円周に
近接して装着され、回転数検出器３の出力は信号線８を
介してバイメタル動作回路４の入力に接続され、バイメ
タル動作回路４の出力は電力線９を介してバイメタル５
の一部の加熱部分に通電するように接続される。バイメ
タル５のバイメタル片の一方の端は支持具６に固着され
、バイメタル片の他方の端は磁気ヘッドｌに固着される
。磁気へ・ノド１はディスク板２に近接して装着される
。First, the configuration of this embodiment device will be explained based on the drawings. This embodiment device includes a magnetic head 1, a disk plate 2, a rotation speed detector 3, a bimetal operating circuit 4, a bimetal 5, a support 6, a rotating shaft 7, a signal line 8, and a power line. 9. The disk plate 2 is fixed to the rotating shaft 7 at its center position, the rotation speed detector 3 is mounted close to the circumference of the disk plate 2, and the output of the rotation speed detector 3 is transmitted via a signal line 8 to a bimetal operation. The output of the bimetal operation circuit 4 is connected to the input of the circuit 4, and the output of the bimetal operation circuit 4 is connected to the bimetal 5 via the power line 9.
is connected so as to energize some heating parts of the One end of the bimetal piece of the bimetal 5 is fixed to the support 6, and the other end of the bimetal piece is fixed to the magnetic head l. The magnetic throat 1 is mounted close to the disk plate 2.

次に、この実施例装置の動作を図に基づいて説明する。Next, the operation of this embodiment device will be explained based on the drawings.

ディスク板２が回転軸７０周りに回転させられ、所定の
回転数に達すると回転数検出器３でこれが検出され、こ
の回転数検出器３から信号線８を介してバイメタル動作
回路４に検知信号が出力される。バイメタル動作回路４
はこの検知信号に基づいて、電ｍ９を介して、バイメタ
ル５の一部分に通電し加熱する。これによりバイメタル
５が湾曲し、その先端に固着された磁気ヘッド１はディ
スク板２に近接させられ図の点線で示す位置にもたらさ
れ、ディスク板２の回転に伴う浮上刃を壺けながら近接
した位置を保持して磁気ヘッド１によるディスク板２へ
のデータの読込みおよび書込みが可能にされる。When the disk plate 2 is rotated around the rotating shaft 70 and reaches a predetermined number of revolutions, the number of revolutions is detected by the number of revolutions detector 3, and a detection signal is sent from the number of revolutions detector 3 to the bimetal operation circuit 4 via the signal line 8. is output. Bimetal operation circuit 4
Based on this detection signal, electricity is applied to a part of the bimetal 5 via the electric current m9 to heat it. As a result, the bimetal 5 is curved, and the magnetic head 1 fixed to the tip thereof is brought close to the disk plate 2 and brought to the position shown by the dotted line in the figure, and the magnetic head 1 approaches the disk plate 2 while holding the floating blade as the disk plate 2 rotates. The magnetic head 1 is able to read and write data onto the disk plate 2 while maintaining this position.

また、回転数検出器３およびバイメタル動作回路４の故
障ならびに信号線８および電力線９の断線により、バイ
メタル動作回路４が動作しない場合は、バイメタル５の
位置復元力により、磁気ヘッド１はディスク板２から離
れる。In addition, if the bimetal operation circuit 4 does not operate due to a failure of the rotation speed detector 3 and the bimetal operation circuit 4 or a disconnection of the signal line 8 and the power line 9, the magnetic head 1 is moved to the disk plate 2 due to the positional restoring force of the bimetal 5. move away from

次に、磁気ディスク装置を停止する場合には、磁気ヘッ
ド１の位置を保持するに充分な浮上刃を与える速度より
ディスク板２の回転が低下し始めた状態が回転数検出器
３で検出され、この回転数検出器３から信号線８を介し
て、バイメタル動作回路４に検知信号が出力され、電線
９を介しての電流供給が遮断されることにより、バイメ
タル５に復元され図の実線の位置になる。Next, when stopping the magnetic disk drive, the rotation speed detector 3 detects that the rotation of the disk plate 2 has begun to decrease below the speed that provides sufficient floating blades to maintain the position of the magnetic head 1. A detection signal is output from the rotation speed detector 3 to the bimetal operation circuit 4 via the signal line 8, and the current supply via the electric wire 9 is cut off, so that the bimetal 5 is restored and the solid line in the figure Be in position.

上記例は、バイメタルで構成された支持腕の一部に電流
を流すことによりこの支持腕を加熱するものであるが、
別に支持腕の近傍へ電熱線を設け、これに通電すること
により支持腕を加熱するように構成することができる。In the above example, the support arm made of bimetal is heated by passing an electric current through a part of the support arm.
Separately, a heating wire may be provided near the support arm, and the support arm may be heated by energizing the wire.

〔発明の効果〕〔Effect of the invention〕

本発明は、以上説明したように、磁気ディスク装置での
へノドクラッシュ故障原因を完全に除去しているので、
この故障に伴うヘッドおよびディスク板などの破損を防
止する効果がある。また、この破損に伴う格納データの
消失がないのでデータの書込みおよび読出し時間の浪費
を節減する効果がある。As explained above, the present invention completely eliminates the causes of hendo crash failures in magnetic disk drives.
This has the effect of preventing damage to the head, disk plate, etc. due to this failure. Furthermore, since there is no loss of stored data due to this damage, there is an effect of reducing wasted data writing and reading time.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明実施例装置の機構を示す模式図。 １・・・磁気ヘッド、２・・・ディスク板、３・・・回
転数検出器、４・・・バイメタル動作回路、５・・・／
ｓ＋イメタル、６・・・支持具、７・・・回転軸、８・
・・信号線、９・・・電力線。The figure is a schematic diagram showing the mechanism of an apparatus according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Magnetic head, 2... Disk plate, 3... Rotation speed detector, 4... Bimetal operation circuit, 5.../
s + Imetal, 6... Support, 7... Rotating shaft, 8.
...Signal line, 9...Power line.

Claims (2)

【特許請求の範囲】[Claims] （１）磁気ディスクの記憶面に接近して装着された磁気
ヘッドと、 この磁気ヘッドがその一方の端部もしくはその近傍に固
着された支持腕と、 この支持腕をその他方の端部もしくはその近傍に固着さ
れた支持具と を備えた磁気ディスク装置において、 上記支持腕が２種類の熱膨張係数の異なる金属がはり合
せて構成され、 上記磁気ディスクの回転速度を検出する手段と、この手
段の検出出力に基づいて上記支持腕を加熱する手段と を備えたことを特徴とする磁気ディスク装置。(1) A magnetic head mounted close to the storage surface of a magnetic disk, a support arm to which the magnetic head is fixed at or near one end of the magnetic head, and a support arm attached to the other end or its vicinity. A magnetic disk device comprising a support fixed in the vicinity, wherein the support arm is made of two types of metals having different coefficients of thermal expansion bonded together, and means for detecting the rotational speed of the magnetic disk; and means for heating the supporting arm based on the detection output of the magnetic disk device. （２）支持腕を加熱する手段は、支持腕の一部に電流を
通電する手段を含む特許請求の範囲第（１）項に記載の
磁気ディスク装置。(2) The magnetic disk device according to claim (1), wherein the means for heating the support arm includes means for applying current to a part of the support arm.
JP12138184A 1984-06-12 1984-06-12 Magnetic disc device Pending JPS61979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12138184A JPS61979A (en) 1984-06-12 1984-06-12 Magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12138184A JPS61979A (en) 1984-06-12 1984-06-12 Magnetic disc device

Publications (1)

Publication Number Publication Date
JPS61979A true JPS61979A (en) 1986-01-06

Family

ID=14809808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12138184A Pending JPS61979A (en) 1984-06-12 1984-06-12 Magnetic disc device

Country Status (1)

Country Link
JP (1) JPS61979A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257764A2 (en) * 1986-08-02 1988-03-02 Sony Corporation Disc drive systems
JPS63129265U (en) * 1987-02-13 1988-08-24
US4814908A (en) * 1986-12-03 1989-03-21 Magnetic Peripherals Inc. Thermo servo for track centering on a disk
US5303105A (en) * 1990-07-18 1994-04-12 Seagate Technology, Inc. Shape memory alloy for centering a transducer carried by a slider in a support arm over a track on a magnetic disk
US5588200A (en) * 1995-05-15 1996-12-31 K. R. Precision Public Company Limited Tightened distribution of magnetic-head suspension-assembly static roll by infrared stress relief
US5963397A (en) * 1995-06-07 1999-10-05 International Business Machines Corporation Ceramic suspension bent by stressed patch
US6049443A (en) * 1995-06-07 2000-04-11 International Business Machines Corporation Suspension bent by stressed patch
KR20030058752A (en) * 2001-12-31 2003-07-07 엘지전자 주식회사 Optical recorer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257764A2 (en) * 1986-08-02 1988-03-02 Sony Corporation Disc drive systems
US4814908A (en) * 1986-12-03 1989-03-21 Magnetic Peripherals Inc. Thermo servo for track centering on a disk
JPS63129265U (en) * 1987-02-13 1988-08-24
US5303105A (en) * 1990-07-18 1994-04-12 Seagate Technology, Inc. Shape memory alloy for centering a transducer carried by a slider in a support arm over a track on a magnetic disk
US5588200A (en) * 1995-05-15 1996-12-31 K. R. Precision Public Company Limited Tightened distribution of magnetic-head suspension-assembly static roll by infrared stress relief
US5963397A (en) * 1995-06-07 1999-10-05 International Business Machines Corporation Ceramic suspension bent by stressed patch
US6049443A (en) * 1995-06-07 2000-04-11 International Business Machines Corporation Suspension bent by stressed patch
KR20030058752A (en) * 2001-12-31 2003-07-07 엘지전자 주식회사 Optical recorer

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