JPS60138788A - Carriage lock device of magnetic disc device - Google Patents

Carriage lock device of magnetic disc device

Info

Publication number
JPS60138788A
JPS60138788A JP24647183A JP24647183A JPS60138788A JP S60138788 A JPS60138788 A JP S60138788A JP 24647183 A JP24647183 A JP 24647183A JP 24647183 A JP24647183 A JP 24647183A JP S60138788 A JPS60138788 A JP S60138788A
Authority
JP
Japan
Prior art keywords
carriage
spring
power
lock
solenoid
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.)
Granted
Application number
JP24647183A
Other languages
Japanese (ja)
Other versions
JPH0247031B2 (en
Inventor
Masakatsu Hattori
正勝 服部
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP24647183A priority Critical patent/JPH0247031B2/en
Publication of JPS60138788A publication Critical patent/JPS60138788A/en
Publication of JPH0247031B2 publication Critical patent/JPH0247031B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/54Disposition 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
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5521Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof

Landscapes

  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Moving Of Heads (AREA)

Abstract

PURPOSE:To attain high speed of access by energyzing a solenoid at a fixed time just after power supply interruption so as to release the carriage from the lock state thereby decreasing the spring constant of the spring energyzing the carriage to the lock position direction. CONSTITUTION:When a power is cut off during application of power, since a disc drive motor continues coasting, a counter electromotive force is generated in a coil 20, currents i1-i6 flow, the solenoid 12 energizes an L-form lever 8 counterclockwise so as to hold the lock release state and the bottom face of the lock pin 9 and the lever 8 is kept noncontactive state for a while. On the other hand, no current flows to the voice coil motor VCM by the cut-off of power, the carriage 2 is moved by a tensile spring 11b so that the head position comes to the center direction of the disc, since the pin 9 and the lever 8 are kept contactless, the tensile force of the spring 11b is a degree overcoming the friction force of rollers 4a, 4b. Then the spring constant of the spring 11b is decreased so as to reduce the force of the VCM thereby increasing the speed of access.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は磁気ディスク装置に関し、特に電源遮断中にキ
ャリッジを固定するキャリッジロック装置の改良に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic disk drive, and more particularly to an improvement in a carriage lock device that locks a carriage during power-off.

〔発明の技術的背景〕[Technical background of the invention]

磁気ディスク装置では、ディスク状の磁気記録媒体に対
してデータを磁気的に記録、再生するヘッドを、磁気記
録媒体の所望の位置に移動位置決めさせる機構、すなわ
ちアクセス機構を備えている。そして、この機構の駆動
源にはボイスコイルモータ、ステッピングモータ等が用
いられている。
A magnetic disk drive includes a mechanism, ie, an access mechanism, for moving and positioning a head for magnetically recording and reproducing data on a disk-shaped magnetic recording medium to a desired position on the magnetic recording medium. A voice coil motor, a stepping motor, or the like is used as a drive source for this mechanism.

近年の磁気ディスク装置の多くはC8S方式(Cont
act 5tart 5top 方式)を採用している
ため、ディスクの回転停止時は、ヘッドはバネの付勢力
により磁気記録媒体のデータトラック以外の特定の領域
(通常最内周)に移動させられ、その位置で磁気記録媒
体に接触した状態になっている。
Many of the recent magnetic disk drives use the C8S method (Cont
act 5 tart 5 top method), when the disk stops rotating, the head is moved to a specific area (usually the innermost circumference) other than the data track of the magnetic recording medium by the biasing force of the spring, and the head is moved to that position. is in contact with the magnetic recording medium.

一方、キャリッジは電源オフ時(遮断時)には、ボイス
コイルモータ等の力から解放され、キャリッジ案内面や
軸受部等の機械的接触部における摩擦のみによって拘束
されている。ところが、かがる状態では装置外からのわ
ずかな衝撃によりキャリッジが移動し、ヘッドが媒体と
接触したまま移動して、媒体面を傷つけてしまうことが
ある。
On the other hand, when the power is turned off (when cut off), the carriage is released from the force of the voice coil motor, etc., and is restrained only by friction at mechanical contact parts such as the carriage guide surface and the bearing. However, in a crooked state, the carriage may move due to a slight impact from outside the apparatus, and the head may move while in contact with the medium, damaging the surface of the medium.

こ(7:” q ’C事態を避けるため、磁気ディスク
装置の電電ト同時に働く自動ロック機構が提案されてい
ζ 玉、添付図面の第1図を参照して従来技術を小5A
する。なお、図面の説明において同一要素は同一符号で
示す。
In order to avoid this (7) situation, an automatic locking mechanism that works simultaneously with the electric and electric power of the magnetic disk drive has been proposed.
do. In addition, in the description of the drawings, the same elements are indicated by the same symbols.

第1図は従来装置の一例の構成図である。図示しない媒
体(ディスク)に情報を記録、再生するためのヘッドl
を搭載したキャリッジ2は、ボイスコイルモータ(VO
M)3によって、ローラ4a 、 4bを介して装置台
に固定された案内面5a 、 51)に沿ってストッパ
6a 、 5bの間を直線的に往復移動させられる。支
点7を中心にして回転自在なL形しバー8の一方の先端
には、キャリッジ2に設けられたロックピ/9に係合す
る溝lOが形成されている。L形しバー8の他方の先端
には、溝lOがロックピン9に係合する方向へL形しバ
ー8を付勢する(ロックする)引張バネll&と、引張
バネIIILの力に抗してL形しバー8を付勢する(ロ
ックを解除する)ソレノイド12とが設けられている。
FIG. 1 is a configuration diagram of an example of a conventional device. Head l for recording and reproducing information on a medium (disc) not shown
Carriage 2 equipped with a voice coil motor (VO
M) 3 linearly reciprocates between stoppers 6a and 5b along guide surfaces 5a and 51) fixed to the apparatus stand via rollers 4a and 4b. A groove lO that engages with a lock pin/9 provided on the carriage 2 is formed at one end of the L-shaped bar 8 which is rotatable about the fulcrum 7. At the other end of the L-shaped bar 8, there are a tension spring ll& which biases (locks) the L-shaped bar 8 in the direction in which the groove lO engages with the lock pin 9, and a tension spring III which resists the force of the tension spring III. A solenoid 12 which is L-shaped and biases (releases the lock) the bar 8 is provided.

ストッパ6CはL形しバー8が引張バネiiaによって
必要以上に回動させられないようにするためのものであ
り、引張バネllbはVOM3の力に抗してキャリッジ
2をロック位置に移動させるためのものである。
The stopper 6C is L-shaped and is for preventing the bar 8 from being rotated more than necessary by the tension spring IIA, and the tension spring ILB is for moving the carriage 2 to the lock position against the force of the VOM3. belongs to.

次に、第1図の構成例の動作を説明する。通電時にはソ
レノイド12が働いて溝10はロックピン9から外され
(ロックが解除され)、キャリッジ2はVOM3によっ
て移動させられる。 \電源が遮断されるとソレノイド
12への通電は停止されるので、L形しバー8は図にお
いて時計回りの方向に回動し、L形しバー8の底面がロ
ックピン9の先端に接触しながら、キャリッジ2は引張
バネIIToによってロック位置の方向に移動させられ
る。ヘッド1がディスクの情報記録部分から外れるよう
に、キャリッジがロック位置まで移動させられると、L
形しバー8の先端の溝10はロックピン9に係合する。
Next, the operation of the configuration example shown in FIG. 1 will be explained. When energized, the solenoid 12 operates, the groove 10 is removed from the lock pin 9 (lock is released), and the carriage 2 is moved by the VOM 3. \When the power is cut off, the energization to the solenoid 12 is stopped, so the L-shaped bar 8 rotates clockwise in the figure, and the bottom of the L-shaped bar 8 comes into contact with the tip of the lock pin 9. Meanwhile, the carriage 2 is moved in the direction of the locking position by the tension spring IITo. When the carriage is moved to the lock position so that the head 1 is removed from the information recording area of the disk, the L
A groove 10 at the tip of the shaping bar 8 engages with a lock pin 9.

このようにして、電源が遮断されている間はキャリッジ
2はロック位置に固定される。
In this way, the carriage 2 is fixed in the locked position while the power is cut off.

〔背景技術の問題点〕[Problems with background technology]

上記の如く、電源が遮断されてキャリッジ2がロック位
置の方向に移動する際には、ロックピン9はL形しバー
8の底面に接触した状態であるため、引張バネ1lkl
の引張力はこれらの間の摩擦力およびローラ4a 、 
4bの摩擦力に打ち勝つ大きさのものでなければならな
い。ここで、ローラ4a。
As mentioned above, when the power is cut off and the carriage 2 moves in the direction of the lock position, the lock pin 9 is L-shaped and in contact with the bottom surface of the bar 8, so the tension spring 1lkl
The tensile force is the frictional force between them and the roller 4a,
It must be large enough to overcome the frictional force of 4b. Here, the roller 4a.

4bの摩擦力は比較的小さいが、ロックピン9とL形し
バー8との間の摩擦力は引張バネllaの付勢のために
相当に大きい。
4b is relatively small, but the frictional force between the lock pin 9 and the L-shaped bar 8 is considerably large due to the biasing of the tension spring lla.

従って、引張バネ111)の引張力はある程度大きくし
なけれはならないが、この引張力は通電中もキャリッジ
2を伺勢するため、アクチュエータの応答性を鈍らせる
ことになる。そのため、アクセスタイムが長くなり、高
速動作に適しなくなるという欠点が生じる。
Therefore, the tensile force of the tension spring 111) must be increased to some extent, but this tensile force biases the carriage 2 even during energization, which slows down the responsiveness of the actuator. This results in a disadvantage that the access time becomes long, making it unsuitable for high-speed operation.

〔発明の目的〕[Purpose of the invention]

本発明は上記の従来装置の欠点を克服するためになされ
たもので、キャリッジをロック位置の方向に付勢するバ
ネのバネ定数を小さくし、アクセスタイムを短くするこ
とのできる磁気ディスク装置のキャリッジロック装置を
提供することを目的とする。
The present invention has been made to overcome the drawbacks of the conventional devices described above, and provides a carriage for a magnetic disk drive that can reduce the spring constant of the spring that biases the carriage in the direction of the lock position, thereby shortening the access time. The purpose is to provide a locking device.

〔発明の概要〕[Summary of the invention]

上記の目的を実現するため本発明は、電源遮断直後の一
定の時間はロック部材をロックから解除した状態に保持
するよう、ソレノイドに通電する電源供給手段を備える
ことによって、キャリッジをロック位置の方向に付勢す
るバネ定数を小さくした磁気ディスク装置のキャリッジ
ロック装置を提供するものである。
In order to achieve the above object, the present invention moves the carriage in the direction of the locked position by providing power supply means that energizes the solenoid so as to hold the locking member in an unlocked state for a certain period of time immediately after the power is cut off. The present invention provides a carriage lock device for a magnetic disk device in which a spring constant for biasing the magnetic disk device is reduced.

〔発明の実施例〕[Embodiments of the invention]

以下、添付図面の第2図を参照して本発明の一実施例を
説明する。図示しないディスク媒体を回転させるディス
クドライブ(DD)モータのコイル20は、モータ制御
系21により制御されるトランジスタTR1,TR2,
TR3により励磁される。コイル20は4個のダイオー
ドからなる全波整流回路22を介してソレノイド20の
入力側に接続されている。
Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2 of the accompanying drawings. A coil 20 of a disk drive (DD) motor that rotates a disk medium (not shown) includes transistors TR1, TR2,
It is excited by TR3. The coil 20 is connected to the input side of the solenoid 20 via a full-wave rectifier circuit 22 consisting of four diodes.

次に、第2図の実施例の動作を説明する。通電中はソレ
ノイド12の引張力が引張バネIlaに打ち勝ち、L形
しバー8はロック解除の状態を保っている。また、コイ
ル20は励研されてDDモータはディスクを回転させて
いる。
Next, the operation of the embodiment shown in FIG. 2 will be explained. While energized, the tensile force of the solenoid 12 overcomes the tension spring Ila, and the L-shaped bar 8 remains unlocked. Further, the coil 20 is excited and the DD motor rotates the disk.

通電中に電源を遮断すると、しばらくの間(所定の時間
)はDDモータは慣性で回転な読けるため、コイル20
に逆起電力が発生する。このため、図示の11〜16の
如く電流が生じる。この電流によりソレノイド12はL
形しバー8を反時計回りの方向に付勢し、ロック解除の
状態を保持するので、上記しばらくの間はロックピン9
とL形しバー8の底面は接触しない状態に保たれる。他
方、電源が遮断されるとVOM 3には電流が流れなく
なるので、キャリッジ2はヘッド位置がディスクの中心
方向に来るように、引張バネ1111によってロック位
置の方向へ移動させられる。このとき、ロックピン9と
L形しバー8は非接触に保たれているので、引張バネ1
11)の引張力はローラ4a 、 4’bの摩擦力に打
ち勝つ程度のものでよい。
If the power is cut off while the power is on, the DD motor will not rotate due to inertia for a while (predetermined time), so the coil 20
A back electromotive force is generated. For this reason, currents are generated as shown at 11 to 16 in the figure. This current causes the solenoid 12 to go low.
Since the shaping bar 8 is biased counterclockwise to maintain the unlocked state, the lock pin 9 remains for a while.
The bottom surface of the bar 8 is kept in a non-contact state. On the other hand, when the power is cut off, no current flows through the VOM 3, so the carriage 2 is moved toward the lock position by the tension spring 1111 so that the head position is toward the center of the disk. At this time, since the lock pin 9 and the L-shaped bar 8 are kept in non-contact, the tension spring 1
The tensile force 11) may be sufficient to overcome the frictional force of the rollers 4a and 4'b.

電源を遮断してから所定の時間が経過すると、DDモー
タの慣性による回転はなくなり、逆起電力もなくなるの
でソレノイド12により引張られていたL形しバー8は
引張バネIl&に引き戻されて時計回りの方向に回動す
る。このとき、キャリッジ2は引張バネll’bによっ
てロック位置(キャリッジ2がストッパ6bに当接する
位置)まで移動させられているので、ロックピン9はL
形しバー8の先端の溝lOに係合することになる。これ
によってキャリッジ2はロックされる。
When a predetermined period of time has elapsed after the power was cut off, the DD motor no longer rotates due to inertia and the back electromotive force also disappears, so the L-shaped bar 8 that was being pulled by the solenoid 12 is pulled back by the tension spring Il& and rotates clockwise. Rotate in the direction of. At this time, since the carriage 2 has been moved to the lock position (the position where the carriage 2 contacts the stopper 6b) by the tension spring ll'b, the lock pin 9 is in the L position.
It will engage with the groove lO at the tip of the shaping bar 8. This locks the carriage 2.

このように、第2図の実施例によればロックピン9とL
形しバー8の摩擦力を少なく(理想的には無くすことが
できる)したので引張バネ1111のバネ定数を小さく
することができ、そのためVOM3の力を小さくでき、
アクセスの高速化を図ることができる。
In this way, according to the embodiment shown in FIG.
Since the frictional force of the shaped bar 8 is reduced (ideally, it can be eliminated), the spring constant of the tension spring 1111 can be reduced, and therefore the force of the VOM3 can be reduced,
Access speed can be increased.

なお、電源遮断直後にソレノイド12に通電するための
電流源としては、 DDモータの慣性による逆起電力を
利用することのほか、コンデンサに電荷を蓄積しておい
て電源遮断直後にソレノイドに通電する等、種々のもの
がある。
In addition, as a current source to energize the solenoid 12 immediately after the power is cut off, in addition to using the back electromotive force due to the inertia of the DD motor, it is also possible to accumulate charge in a capacitor and energize the solenoid immediately after the power is cut off. There are various things such as.

〔発明の効果〕〔Effect of the invention〕

上記の如く本発明によれば、電源遮断直後の一定時間は
ソレノイドに通電してロック部材をロック解除の状態に
保持し、ロック部材(L形しバー等)とロックピンの間
に摩擦力が生じないようにしたので、キャリッジをロッ
ク位置の方向へ付勢するバネのバネ定数を小さくし、が
っVOMの力を小さくしてアクセスタイムを短くできる
ようにした磁気ディスク装いのキャリッジロック装置を
提供することができる。
As described above, according to the present invention, the solenoid is energized for a certain period of time immediately after the power is turned off to maintain the lock member in the unlocked state, and frictional force is created between the lock member (L-shaped bar, etc.) and the lock pin. In order to prevent this from occurring, we have created a magnetic disk-equipped carriage lock device that reduces the spring constant of the spring that urges the carriage toward the lock position, reduces the VOM force, and shortens the access time. can be provided.

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

第1図は従来装置の一例の構成図、第2図は本発明の一
実施例の構成図である。 l・・・ヘッド、2・・・キャリッジ、4a 、 4t
l・・・ローラ、5a 、 5b・・・案内面、6a 
、 61)・・・ストッパ、8・・・L形しバー、9・
・・ロックピン、IIIL 、 1it)・・・引張バ
ネ、12・・・ソレノイド、2o・・・コイル、22・
・・全波整流回路。 出願人代理人 猪 股 清
FIG. 1 is a block diagram of an example of a conventional device, and FIG. 2 is a block diagram of an embodiment of the present invention. l...head, 2...carriage, 4a, 4t
l...Roller, 5a, 5b...Guide surface, 6a
, 61)...stopper, 8...L-shaped bar, 9.
...Lock pin, IIIL, 1it)...Tension spring, 12...Solenoid, 2o...Coil, 22.
...Full wave rectifier circuit. Applicant's agent Kiyoshi Inomata

Claims (1)

【特許請求の範囲】[Claims] 電源遮断状態のとき磁気ヘッドが取付けられたキャリッ
ジがバネの付勢力により移動させられ前記S気ヘッドが
磁気ディスク上の所定の位置に位置決めさせられる磁気
ディスク装置において、電源遮断中はバネによって付勢
され前記キャリッジを前記所定の位置で固定するロック
部材と、通電中は前記ロック部材を前記バネに抗して付
勢し前記キャリッジをロック状態から解除するソレノイ
ドと、電源遮断直後の一定期間前記キャリッジをロック
状態から解除するため前記ソレノイドに通電する電源供
給手段とを具備することを特徴とする磁気ディスク装置
のキャリッジロック装置。
In a magnetic disk drive in which a carriage to which a magnetic head is attached is moved by the biasing force of a spring when the power is cut off, and the S-air head is positioned at a predetermined position on the magnetic disk, the carriage is biased by the spring when the power is cut off. a locking member that fixes the carriage at the predetermined position; a solenoid that biases the locking member against the spring during energization to release the carriage from the locked state; A carriage locking device for a magnetic disk drive, comprising power supply means for energizing the solenoid to release the solenoid from a locked state.
JP24647183A 1983-12-27 1983-12-27 JIKIDEISUKUSOCHINOKYARITSUJIROTSUKUSOCHI Expired - Lifetime JPH0247031B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24647183A JPH0247031B2 (en) 1983-12-27 1983-12-27 JIKIDEISUKUSOCHINOKYARITSUJIROTSUKUSOCHI

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24647183A JPH0247031B2 (en) 1983-12-27 1983-12-27 JIKIDEISUKUSOCHINOKYARITSUJIROTSUKUSOCHI

Publications (2)

Publication Number Publication Date
JPS60138788A true JPS60138788A (en) 1985-07-23
JPH0247031B2 JPH0247031B2 (en) 1990-10-18

Family

ID=17148896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24647183A Expired - Lifetime JPH0247031B2 (en) 1983-12-27 1983-12-27 JIKIDEISUKUSOCHINOKYARITSUJIROTSUKUSOCHI

Country Status (1)

Country Link
JP (1) JPH0247031B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167170A (en) * 1984-02-09 1985-08-30 Mitsubishi Electric Corp Magnetic disk device
JPS62109269A (en) * 1985-11-08 1987-05-20 Hitachi Electronics Eng Co Ltd Positioning device for loading device in disc type recording medium driver
JPS6431563U (en) * 1987-08-17 1989-02-27
US4831469A (en) * 1987-07-29 1989-05-16 International Business Machines Corporation Disk drive head retract and motor braking method and apparatus
JPH0253271A (en) * 1988-08-17 1990-02-22 Alps Electric Co Ltd Disk driving device
JPH0773620A (en) * 1993-05-27 1995-03-17 Samsung Electron Co Ltd Actuator fixing mechanism of hard disk driver
CN110000611A (en) * 2019-05-06 2019-07-12 浙江大学 The fast tool servo device and its control method for having cutting force online awareness ability

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167170A (en) * 1984-02-09 1985-08-30 Mitsubishi Electric Corp Magnetic disk device
JPS62109269A (en) * 1985-11-08 1987-05-20 Hitachi Electronics Eng Co Ltd Positioning device for loading device in disc type recording medium driver
US4831469A (en) * 1987-07-29 1989-05-16 International Business Machines Corporation Disk drive head retract and motor braking method and apparatus
JPS6431563U (en) * 1987-08-17 1989-02-27
JPH0253271A (en) * 1988-08-17 1990-02-22 Alps Electric Co Ltd Disk driving device
JPH0773620A (en) * 1993-05-27 1995-03-17 Samsung Electron Co Ltd Actuator fixing mechanism of hard disk driver
CN110000611A (en) * 2019-05-06 2019-07-12 浙江大学 The fast tool servo device and its control method for having cutting force online awareness ability
CN110000611B (en) * 2019-05-06 2020-11-17 浙江大学 Control method of fast cutter servo device with cutting force online sensing function

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