JPS6286588A - Floppy disk device - Google Patents

Floppy disk device

Info

Publication number
JPS6286588A
JPS6286588A JP22634385A JP22634385A JPS6286588A JP S6286588 A JPS6286588 A JP S6286588A JP 22634385 A JP22634385 A JP 22634385A JP 22634385 A JP22634385 A JP 22634385A JP S6286588 A JPS6286588 A JP S6286588A
Authority
JP
Japan
Prior art keywords
light emitting
emitting diode
power
zero track
phase
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
JP22634385A
Other languages
Japanese (ja)
Inventor
Terumitsu Okamoto
岡本　輝満
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
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 filed Critical NEC Corp
Priority to JP22634385A priority Critical patent/JPS6286588A/en
Publication of JPS6286588A publication Critical patent/JPS6286588A/en
Pending legal-status Critical Current

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  • Moving Of The Head To Find And Align With The Track (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)

Abstract

PURPOSE:To lower the power consumption of a zero track sensor by impressing a power to a light emitting diode for the zero track sensor only when the exciting phase of a step motor coincides with the exciting phase of a zero track. CONSTITUTION:An exciting phase change over means 3 successively changes over the exciting phase of the step motor 4 according to a step signal 15. A zero track exciting phase detecting means 5 monitors the change of this exciting phase and generates an output 11 when the same phase as a phase exciting the zero track is excited. A power disconnecting means 2 supplies a power to the light emitting diode 1a in accordance with the output 11. When a magnetic head reaches the zero track, a shield plate between the light emitting diode 1a and a phototransistor 1b is removed and at this time, the power is supplied to the light emitting diode 1a to emit the light, so that the phototransistor 1b operates. In this manner, the power is supplied to the light emitting diode for a required period and the power consumption is lowered.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はフロッピィディスク装置のゼロトラックセンナ
の回路方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a circuit system for a zero track sensor of a floppy disk drive.

従来の技術 従来、この種のフロッピィディスク装置１ハ１発光ダイ
オードとホトトランジスタの組み合せより成るゼロトラ
ックセンナを有し、この発光ダイオードには常時電流が
供給されていた。したがって低消費電力型のフロッピィ
ディスク装置’を実現する上での１つの障壁となってい
た。BACKGROUND OF THE INVENTION Conventionally, a floppy disk device of this type has a zero-track sensor consisting of a combination of a light emitting diode and a phototransistor, and the light emitting diode is constantly supplied with current. Therefore, this has been one of the obstacles to realizing a low power consumption floppy disk device.

発明が解決しようとする問題点 本発明の目的は、上記の欠点、すなわちゼロトラックセ
ンサの発光ダイオードに常時電流が供給され、電力が常
に消費されているという問題点を解決したフロッピィデ
ィスク装置を提供することにある。Problems to be Solved by the Invention An object of the present invention is to provide a floppy disk device that solves the above-mentioned drawbacks, namely, that current is constantly supplied to the light emitting diode of the zero track sensor, and power is constantly consumed. It's about doing.

問題点を解決するための手段 本発明は上述の問題点全解決するｔめに、磁気ヘッドと
、磁気ヘッドのトラック移動を行うためのステップモー
タと、発光ダイオードおよびホトトランジスタの組合せ
よりなるゼロトラックセンサと、この発光ダイオードに
印加する電力を切断する手段と、ステップモータの励磁
相とゼロトラックｅ＠磁する相とが同一の相であること
を検出し、電力切断手段に制御信号を出力する検出手段
とを有する構成を採用するものである。Means for Solving the Problems In order to solve all of the above-mentioned problems, the present invention provides a zero track system comprising a combination of a magnetic head, a step motor for moving the magnetic head on track, a light emitting diode, and a phototransistor. A sensor, a means for cutting off the power applied to the light emitting diode, detecting that the excitation phase of the step motor and the zero track e@ magnetic phase are the same phase, and output a control signal to the power cutting means. The present invention employs a configuration including a detection means.

作用 本発明は上述のように構成し友ので、ステップモータで
磁気ヘッドのトラック移動を行う時にステップモータの
励磁相とゼロトラックを励磁する相とが一致する時にの
み、検出手段が制御信号を出して、電力切断手段を作動
させて、発光ダイオードに電力全印加してゼロトラック
センサが動作状態になる。Operation Since the present invention is constructed as described above, the detection means outputs a control signal only when the excitation phase of the step motor and the phase of excitation of the zero track match when the step motor is used to move the magnetic head in a track. Then, the power cut-off means is activated to apply full power to the light emitting diode, and the zero track sensor becomes operational.

実施例 次に本発明の実施例について図面全参照して説明する。Example Next, embodiments of the present invention will be described with reference to all the drawings.

本発明の一実施例をブロック図で示す第１図を参照する
と、本発明のフロッピィディスク装置は、発光ダイオー
ドｌａとホトトランジスタ１ｂとから構成されるゼロト
ラックセンサ１と、電力切断手段２と、ステップモータ
４と、ステップモータ励磁相切替手段３と、ゼロトラッ
ク励磁相検出手段５とからなり、ステップモータ駆動線
１０３１〜１０ｄと、ゼロトラック励磁相検出手段５か
らの制御信号線１１と、電力供給線１２と、発光ダイオ
−）’ｌａへの電力供給線１３と、ホトトランジスタ１
ｂの出力線１４と、ステップ信号線１５とよりなってい
る。Referring to FIG. 1, which shows a block diagram of an embodiment of the present invention, the floppy disk device of the present invention includes a zero-track sensor 1 composed of a light emitting diode la and a phototransistor 1b, a power cut-off means 2, It consists of a step motor 4, a step motor excitation phase switching means 3, and a zero track excitation phase detection means 5, and includes step motor drive lines 1031 to 10d, a control signal line 11 from the zero track excitation phase detection means 5, and a power A supply line 12, a power supply line 13 to the light emitting diode)'la, and a phototransistor 1.
It consists of an output line 14 of b and a step signal line 15.

次に本実施例の動作について、ｇ１図と第２図のタイミ
ングチャート図を用いて説明する４ステツプモ一タ励磁
相切替手段３はステップ信号１５が入力すると、第２図
１０ａ〜ＩＱｄのような波形の信号をステップモータ４
に切り替えて出力する。ゼロトラック励磁相検出手段５
は励磁相の変化を監視し、ゼロトラックを励磁する相と
同一の相が励磁され几とき出力１ｌｆｊｆ：発生する。Next, the operation of this embodiment will be explained using the timing charts of Fig. g1 and Fig. 2.When the step signal 15 is input, the 4-step motor excitation phase switching means 3 performs the following steps as shown in Fig. 10a to IQd. Waveform signal to step motor 4
Switch to output. Zero track excitation phase detection means 5
monitors the change in the excitation phase, and when the same phase that excites the zero track is excited, an output 1lfjf is generated.

第２図の実施例の場合１０８と１０ｄの論理積を出力１
１としている。電力切断手段２は出力１１を受けて発光
ダイオード１ａに必要な電力全電力供給線１３全通して
供給する。In the case of the embodiment shown in FIG. 2, the logical product of 108 and 10d is output 1
It is set as 1. The power cutting means 2 receives the output 11 and supplies all the power necessary for the light emitting diode 1a through the entire power supply line 13.

磁気ヘッドがゼロトラックまで移動し、ステップモータ
４がゼロトラック励磁相に到達した時に、ゼロトラック
センサ１の発光ダイオード１ａおよびホトトランジスタ
１ｂの間にある遮蔽板が取り除かれ、ホトトランジスタ
１ｂが動作してホトトランジスタ出力１４が得られる。When the magnetic head moves to the zero track and the step motor 4 reaches the zero track excitation phase, the shield plate between the light emitting diode 1a and the phototransistor 1b of the zero track sensor 1 is removed, and the phototransistor 1b starts operating. A phototransistor output 14 is obtained.

なお、本実施例ではステップモータの駆動相を４ステツ
プとしたが、任意の数の相の場合も同様に実現される。In this embodiment, the step motor has four drive phases, but any number of phases can be implemented in the same way.

発明の効果 以上に説明し友ように、本発明によれば、ゼロトラック
センサへの電力供給線の電力切断手段を設けることによ
シ、ゼロトラックセンナの使用電力が低減できるという
効果がある。Effects of the Invention As explained above, according to the present invention, there is an effect that the power consumption of the zero track sensor can be reduced by providing a power cutting means for the power supply line to the zero track sensor.

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

第１図は本発明の一実施例を示すブロック図、第２図は
第１図におけるタイミングチャー）ｔ−示す因である。 １・・・・・・ゼロトラックセンサ、ｌａ・・・・・・
発光ダイオード、１ｂ・・・・・・ホトトランジスタ、
２・旧・・電力切断手段、３・・・・・・ステップモー
タ励磁相切替手段、４・・・・・・ステップモータ、５
・・・・・・ゼロトラック励磁相検出手段、１１・・・
・・・制御信号線、１２・・・・・・電力供給線、１３
・・・・・・電力供給線、１４・・・・・・ホトトラン
ジスタ出力線、１５・・・・・・ステップ信号線、１０
ａ〜１０ｄ・・・・・・ステップモータ駆動線。 、と−占・ユーFIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a timing chart in FIG. 1. 1...Zero track sensor, la...
Light emitting diode, 1b...phototransistor,
2. Old power disconnection means, 3. Step motor excitation phase switching means, 4. Step motor, 5
...Zero track excitation phase detection means, 11...
... Control signal line, 12 ... Power supply line, 13
...Power supply line, 14...Phototransistor output line, 15...Step signal line, 10
a to 10d...Step motor drive line. , and - Zhan Yu

Claims (1)

【特許請求の範囲】[Claims] 少なくとも磁気ヘッドと、この磁気ヘッドのトラック移
動を行うためのステップモータと、発光ダイオードおよ
びホトトランジスタの組合せよりなるゼロトラックセン
サとを有し、前記磁気ヘッドがゼロトラック上に来た時
に、前記ゼロトラックセンサが動作するように構成され
たフロッピイディスク装置において、前記発光ダイオー
ドに印加する電力を切断する手段と、ステップモータの
励磁相とゼロトラックを励磁する相とが同一の相である
ことを検出する手段とを設け、前記検出手段の出力を前
記切断手段の制御信号とすることによって、ステップモ
ータの励磁相とゼロトラックを励磁する相とが一致する
ときのみ、前記発光ダイオードに電力を印加するように
したことを特徴とするフロッピイディスク装置。It has at least a magnetic head, a step motor for moving the magnetic head on track, and a zero track sensor consisting of a combination of a light emitting diode and a phototransistor, and when the magnetic head comes on the zero track, the zero track sensor In a floppy disk device configured to operate a track sensor, it is preferable that the means for cutting off the power applied to the light emitting diode, the excitation phase of the step motor and the phase for exciting the zero track are the same phase. and detecting means, and by using the output of the detecting means as a control signal for the cutting means, power is applied to the light emitting diode only when the excitation phase of the step motor and the phase for exciting the zero track match. A floppy disk device characterized by:
JP22634385A 1985-10-11 1985-10-11 Floppy disk device Pending JPS6286588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22634385A JPS6286588A (en) 1985-10-11 1985-10-11 Floppy disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22634385A JPS6286588A (en) 1985-10-11 1985-10-11 Floppy disk device

Publications (1)

Publication Number Publication Date
JPS6286588A true JPS6286588A (en) 1987-04-21

Family

ID=16843681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22634385A Pending JPS6286588A (en) 1985-10-11 1985-10-11 Floppy disk device

Country Status (1)

Country Link
JP (1) JPS6286588A (en)

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