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JPS647424B2 - - Google Patents
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JPS647424B2 - - Google Patents

Info

Publication number
JPS647424B2
JPS647424B2 JP21026883A JP21026883A JPS647424B2 JP S647424 B2 JPS647424 B2 JP S647424B2 JP 21026883 A JP21026883 A JP 21026883A JP 21026883 A JP21026883 A JP 21026883A JP S647424 B2 JPS647424 B2 JP S647424B2
Authority
JP
Japan
Prior art keywords
actuator
switch element
voltage
drive coil
floppy disk
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
Application number
JP21026883A
Other languages
Japanese (ja)
Other versions
JPS59104761A (en
Inventor
Masayasu Teramura
Hiroshi Kobayashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP58210268A priority Critical patent/JPS59104761A/en
Publication of JPS59104761A publication Critical patent/JPS59104761A/en
Publication of JPS647424B2 publication Critical patent/JPS647424B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00Head arrangements not specific to the method of recording or reproducing
    • G11B21/02Driving or moving of heads

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)

Description

【発明の詳細な説明】 本発明はフロツピイデイスク装置に関するもの
で、使用するヘツドの位置決め用アクチユエータ
の発熱を軽減することを目的とする。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floppy disk device, and an object of the present invention is to reduce heat generation of a positioning actuator for a head used.

一般にこの種の装置に用いられるアクチユエー
タの駆動回路は第1図に示すように構成されてい
る。同図においてアクチユエータ1の駆動コイル
2,3には電源に接続された端子4より電圧+V
が供給されるとともに制御素子5,6,7,8が
端子9,10,11,12に加えられる制御信号
A,,B,により制御される。これらの信号
は時間的にはA→B→→のように順次与えら
れることによりアクチユエータ1の回転軸を動か
す。
Generally, an actuator drive circuit used in this type of device is constructed as shown in FIG. In the figure, the drive coils 2 and 3 of the actuator 1 are supplied with a voltage of +V from the terminal 4 connected to the power supply.
is supplied, and control elements 5, 6, 7, and 8 are controlled by control signals A,, B, applied to terminals 9, 10, 11, and 12. These signals move the rotation axis of the actuator 1 by being given sequentially as A→B→→ in terms of time.

しかしこの場合アクチユエータ1には常に+V
を供給しているためにこれによりアクチユエータ
1の軸等が発熱し、他の部分へ悪影響をおよぼし
てしまうことがある。またこれにともなう消費電
力も大きくなる欠点がある。
However, in this case, actuator 1 always has +V
This may cause the shaft of the actuator 1 to generate heat, which may adversely affect other parts. Additionally, there is a drawback that power consumption increases accordingly.

本発明はこのような欠点を除去するもので、た
とえば駆動時にのみ+Vなる規定電圧をアクチユ
エータに供給し、保持時にはそれより低い電圧+
V1を供給する様にしたものである。
The present invention eliminates such drawbacks; for example, a specified voltage of +V is supplied to the actuator only during driving, and a lower voltage +V is supplied during holding.
It is designed to supply V 1 .

以下にその実施例とともに説明する。第2図に
おいて、1〜12はそれぞれ第1図の同符号のも
のに対応する。13はアクチユエータ1の駆動時
を表示する信号の加わる端子、14はその信号に
よりオフとなり起動時等においてオンとなり導通
するスイツチ素子、15は降圧用の抵抗である。
This will be explained below along with examples. In FIG. 2, 1 to 12 correspond to the same reference numerals in FIG. 1, respectively. 13 is a terminal to which a signal indicating when the actuator 1 is being driven is applied; 14 is a switch element which is turned off by the signal and turned on during startup and conducts; and 15 is a voltage step-down resistor.

この場合、スイツチ素子14を制御する信号C
はフロツピイデイスク装置の選択信号を用いても
よい。またアクチユエータ1を動かす第4図aに
示すステツプパルス信号をモノマルチを使用して
第4図bの様に一定時間開く信号を得て、これを
信号Cとして用いるようにしてもよい。
In this case, the signal C controlling the switch element 14
Alternatively, the selection signal of the floppy disk device may be used. Alternatively, the step pulse signal shown in FIG. 4a that moves the actuator 1 may be used with a monomultiplier to obtain a signal that opens for a certain period of time as shown in FIG. 4b, and this may be used as the signal C.

このように構成すれば駆動時にのみスイツチ素
子14がオンとなつて導通し、電圧+Vがアクチ
ユエータ1に供給され、動作する。しかしそれ以
外の時にはスイツチ素子14がオフとなり抵抗1
5で降圧された電圧がアクチユエータ1に供給さ
れる。したがつてアクチユエータによる発熱を軽
減することができ、他の部分へ与える悪影響を防
止できる。
With this configuration, the switch element 14 is turned on and conductive only during driving, and the voltage +V is supplied to the actuator 1 to operate. However, at other times, the switch element 14 is turned off and the resistance 1
The voltage stepped down in step 5 is supplied to actuator 1 . Therefore, heat generated by the actuator can be reduced, and adverse effects on other parts can be prevented.

なお、第2図において、アクチユエータ1の保
持時には、電圧Vが降圧用抵抗15と駆動コイル
2,3によつて分圧されて、駆動コイル2,3に
印加されるので、駆動コイル2,3の抵抗値によ
つて印加されやすいという欠点がある。
In FIG. 2, when the actuator 1 is held, the voltage V is divided by the step-down resistor 15 and the drive coils 2 and 3 and applied to the drive coils 2 and 3. It has the disadvantage that it is easily applied depending on the resistance value of .

そこで第3図のように、抵抗15の代りにダイ
オード16を設け、かつ電圧+Vよりも低い一定
の電圧+V1をもつ電源を設け、これを端子17
に接続したものである。
Therefore, as shown in FIG. 3, a diode 16 is provided in place of the resistor 15, and a power source with a constant voltage +V 1 lower than the voltage +V is provided, and this is connected to the terminal 17.
It is connected to.

したがつてスイツチ素子14のオン、オフにと
もなつてダイオード16がオフ、オンとなりアク
チユエータ1に供給する電圧を第2図の回路と同
様に切換えることができる。
Therefore, as the switch element 14 turns on and off, the diode 16 turns off and on, and the voltage supplied to the actuator 1 can be switched in the same manner as in the circuit shown in FIG.

第5図は第3図の実施例のより具体的な構成を
示すもので、スイツチ素子14がインバータ14
a、トランジスタ14b等で構成していることを
示している。
FIG. 5 shows a more specific configuration of the embodiment of FIG. 3, in which the switch element 14 is connected to the inverter 14.
a, a transistor 14b, etc. are shown.

本発明は上記実施例より明らかなように、アク
チユエータの保持時に対応する低電圧を順方向ダ
イオードを介して駆動コイルに供給し、駆動時に
対応する高電圧をスイツチ素子を介して駆動コイ
ルに供給して、スイツチ開閉手段によりスイツチ
素子の開閉を行うという構成としたので、アクチ
ユエータには駆動時のみ駆動力を得る電流を流
し、保持時には保持電流のみ流すことができ、し
かも駆動コイルの抵抗値に左右されない安定した
電圧を駆動コイルに印加でき、アクチユエータの
発熱を正確に制御でき、消費電力を小さくできる
という効果を有する。
As is clear from the above embodiments, the present invention supplies a low voltage corresponding to when the actuator is held to the drive coil via a forward diode, and a high voltage corresponding to the drive time to the drive coil via a switch element. Therefore, the switch element is opened and closed by the switch opening/closing means, so a current to obtain the driving force can be passed through the actuator only when driving, and only a holding current can be passed when holding. This has the effect that a stable voltage can be applied to the drive coil, heat generation of the actuator can be accurately controlled, and power consumption can be reduced.

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

第1図は従来のフロツピイデイスク装置のブロ
ツク図、第2図は本発明の一実施例におけるフロ
ツピイデイスク装置のブロツク図、第3図は他の
実施例のブロツク図、第4図は要部の信号波形
図、第5図は具体的な同要部結線図である。 1……アクチユエータ、14……スイツチ素
子。
FIG. 1 is a block diagram of a conventional floppy disk device, FIG. 2 is a block diagram of a floppy disk device in one embodiment of the present invention, FIG. 3 is a block diagram of another embodiment, and FIG. 4 is a signal waveform diagram of the main part, and FIG. 5 is a specific wiring diagram of the main part. 1... Actuator, 14... Switch element.

Claims (1)

【特許請求の範囲】[Claims] 1 フロツピイデイスク装置本体の磁気ヘツドの
位置決め用のアクチユエータを駆動する駆動コイ
ルと、上記アクチユエータの保持時に対応する低
い一定の電圧を順方向ダイオードを介して上記駆
動コイルに供給する低電圧電源と、上記アクチユ
エータの駆動時に対応する高電圧をスイツチ素子
を介して上記駆動コイルに供給する高電圧電源
と、上記アクチユエータの保持時および駆動時に
応じて、上記スイツチ素子の開閉を切り換えるス
イツチ開閉手段とを備えたフロツピイデイスク装
置。
1. A drive coil that drives an actuator for positioning the magnetic head of the floppy disk device main body, and a low voltage power source that supplies a low constant voltage to the drive coil via a forward diode, corresponding to when the actuator is held. , a high voltage power source that supplies a high voltage corresponding to when the actuator is driven to the drive coil via a switch element, and a switch opening/closing means that switches the opening and closing of the switch element depending on when the actuator is held and when the actuator is driven. Equipped with a floppy disk device.
JP58210268A 1983-11-08 1983-11-08 Floppy disk device Granted JPS59104761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58210268A JPS59104761A (en) 1983-11-08 1983-11-08 Floppy disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58210268A JPS59104761A (en) 1983-11-08 1983-11-08 Floppy disk device

Publications (2)

Publication Number Publication Date
JPS59104761A JPS59104761A (en) 1984-06-16
JPS647424B2 true JPS647424B2 (en) 1989-02-08

Family

ID=16586574

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58210268A Granted JPS59104761A (en) 1983-11-08 1983-11-08 Floppy disk device

Country Status (1)

Country Link
JP (1) JPS59104761A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170083A (en) * 1984-02-10 1985-09-03 Teac Co Disk device
JPS60170078A (en) * 1984-02-10 1985-09-03 Teac Co Disk device
JPS6182375A (en) * 1984-09-29 1986-04-25 Hitachi Ltd Magnetic disk drive method
IT1182457B (en) * 1985-02-21 1987-10-05 Olivetti & Co Spa APPARATUS TO RECORD AND READ BINARY INFORMATION ON A MAGNETIC DISC

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4991208A (en) * 1972-12-29 1974-08-31
JPS5067619A (en) * 1973-10-17 1975-06-06

Also Published As

Publication number Publication date
JPS59104761A (en) 1984-06-16

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