JP2652942B2 - Optical disc playback device - Google Patents
Optical disc playback deviceInfo
- Publication number
- JP2652942B2 JP2652942B2 JP6047680A JP4768094A JP2652942B2 JP 2652942 B2 JP2652942 B2 JP 2652942B2 JP 6047680 A JP6047680 A JP 6047680A JP 4768094 A JP4768094 A JP 4768094A JP 2652942 B2 JP2652942 B2 JP 2652942B2
- Authority
- JP
- Japan
- Prior art keywords
- turntable
- stabilizer
- optical disk
- motor drive
- abnormality
- 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 - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims description 19
- 239000003381 stabilizer Substances 0.000 claims description 19
- 230000001133 acceleration Effects 0.000 claims description 13
- 230000005856 abnormality Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＣＤプレーヤ及びＬＤ
プレーヤ等の光ディスク再生装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD player and an LD.
The present invention relates to an optical disk reproducing device such as a player.
【０００２】[0002]
【従来の技術】光ディスクプレーヤに於いては、ディス
クの回転数を上げると共に外部振動に対して安定な回転
駆動動作を光波長精度で維持すべくスタビライザをディ
スク上に載置して所定の回転数や速度に制御しターンテ
ーブルを駆動していた。2. Description of the Related Art In an optical disk player, a stabilizer is mounted on a disk to increase the rotation speed of the disk and to maintain a stable rotation drive operation with respect to external vibrations at the optical wavelength accuracy. And controlled the speed to drive the turntable.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、従来スタビ
ライザをディスク上に載置せず回転させた場合高速回転
により、ディスクがターンテーブルから浮き上がり、飛
び出してディスクを傷つける欠点や装置を破損してしま
う欠点があった。SUMMARY OF THE INVENTION According to the present invention, when a conventional stabilizer is rotated without being mounted on a disk, the disk is lifted from a turntable by a high-speed rotation, and the disk is damaged and a defect or device which breaks out by damaging the disk. There was a disadvantage.
【０００４】[0004]
【課題を解決するための手段】本発明は、光ディスク再
生装置のターンテーブルに装着された光ディスクにスタ
ビライザが載置された状態で、起動し回転駆動される場
合と、スタビライザが位置ズレや装着忘れ等により正し
く装着されない場合、起動時にモータ駆動回路の駆動出
力として電流等の波形変化を検出する検出手段によって
スタビライザが正しく装着されたかどうかを検出してス
タビライザが正しく装着されない場合の軽い負荷状態で
光ディスクを高速回転したときに生じる事故を未然に防
止するようにした光ディスク再生装置である。SUMMARY OF THE INVENTION The present invention is directed to a case where a stabilizer is started and rotated while an optical disk mounted on a turntable of an optical disk reproducing apparatus is mounted on the optical disk. If the stabilizer is not mounted correctly, the optical disk is lightly loaded when the stabilizer is not mounted properly by detecting whether or not the stabilizer is mounted correctly by detecting means for detecting a waveform change of a current or the like as a drive output of the motor drive circuit at startup. An optical disc reproducing apparatus is designed to prevent an accident that occurs when the optical disc is rotated at a high speed.
【０００５】また一定の時間の範囲にターンテーブルの
回転速度を立ち上げる立ち上げ角加速度のタイムテーブ
ルをマイコンに有し、スタビライザがスリップすること
による立上動作の不安定さを無くしたスタビライザ検出
装置である。最初はスリツプしない程度でゆっくり回転
速度を立上げるタイムテーブルにしておけばスタビライ
ザ無しの場合との比較値の差が大きくなり判別が容易に
なり、より早期にスタビライザ無しを検出することがで
きる。A stabilizer detecting device which has a time table of a rising angular acceleration for raising the rotation speed of the turntable within a predetermined time range in a microcomputer to eliminate instability of a starting operation due to a slip of the stabilizer. It is. At first, if a time table is used in which the rotation speed is slowly increased without slipping, the difference in the comparison value with the case without the stabilizer becomes large, so that the discrimination becomes easy, and the absence of the stabilizer can be detected earlier.
【０００６】[0006]
【実施例】本発明の一実施例を図面をもとに説明する。
図１は本発明の一実施例を示すブロック図で、図２は検
出波形を説明するための図で、図３はフローチャートで
ある。また図４はスタビライザ有無による角加速度の差
を示す図である。An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram for explaining a detected waveform, and FIG. 3 is a flowchart. FIG. 4 is a diagram showing a difference in angular acceleration depending on the presence or absence of a stabilizer.
【０００７】８極の磁石１ａの磁極を有するホールモー
タ１はホールモータドライブ回路により回転駆動され図
示せずもこのモータはターンテーブルに連結されてい
る。ホールモータドライブ回路２の起動電流は図２の
ａ，ｂに示すごときスタビライザがターンテーブルに載
置されたディスク上への装着されその有無によってモー
タに加わる負荷が変わりモータ起動電流の波形の立上り
に波形差を生じる。この波形差を例えばコンパレータを
介した波形整形回路３を介して図２のｃ或いはｄに示す
ごときパルス波形に整形する。The hall motor 1 having the magnetic poles of the eight-pole magnet 1a is driven to rotate by a hall motor drive circuit, and this motor is connected to a turntable (not shown). The starting current of the hall motor drive circuit 2 varies depending on the presence or absence of the stabilizer mounted on the disk placed on the turntable as shown in FIGS. Waveform difference occurs. This waveform difference is shaped into a pulse waveform as shown in FIG. 2C or 2D via a waveform shaping circuit 3 via a comparator, for example.
【０００８】スタビライザがデイスク上に有る場合と無
い場合では負荷であるイナーシャが違う為、図４に示し
た様に角加速度(ａ，ａ’)が異なる。また角加速度
(ａ，ａ’)は、図２に示したホールモータの回転時間Ｔ
1，Ｔ2より下記の様にマイコンにて計算し求めることが
できる。(Ｓ1)Since the inertia, which is a load, differs between the case where the stabilizer is on the disk and the case where the stabilizer is not on the disk, the angular acceleration (a, a ′) is different as shown in FIG. Also angular acceleration
(a, a ') is the rotation time T of the Hall motor shown in FIG.
From 1, T2, it can be calculated and calculated by the microcomputer as follows. (S1)
【０００９】スタビライザ有の場合の角加速度はａ＝２
θ／(Ｔ2 2−Ｔ1 2) スタビライザ無の場合にはａ’＝２θ／(Ｔ’2 2−Ｔ’1
2)となる。(Ｓ2)The angular acceleration with the stabilizer is a = 2
θ / (T2 Two−T1 TwoA) = 2θ / (T′2 Two-T'1
Two). (S2)
【００１０】ここで、ａ，ａ’間にしきい値Ａを設定
し、このしきい値によりマイコンにてスタビライザの有
無の検出を行い、スタビライザの無い場合は、１回転く
らいの短時間に検出が成され、高速回転まで至り、ター
ンテーブルから光ディスクが外れ事故になることはな
い。(Ｓ3)Here, a threshold value A is set between a and a ', and the presence or absence of a stabilizer is detected by a microcomputer based on the threshold value. If there is no stabilizer, the detection is performed in a short time of about one rotation. The rotation speed is high, and the optical disk does not come off from the turntable and no accident occurs. (S3)
【００１１】また立上時間Ｔ1〜nと角加速度の比較テー
ブルをマイコン内のメモリーに有し、スリップの無い所
定の角加速度例えば曲線Ｂで立上げるようにマイコンの
メモリーに記憶されたタイムテーブルにより制御し特に
回転開始時の安全駆動を成すことができる。又上記検出
回路はホールモータの駆動電流波形を用いる例を示し説
明したがホール素子の出力のタイミング差を検出するこ
とによりモータの回転加速度を検出するように成すこと
が出来る。A comparison table between the rise times T1 to n and the angular acceleration is stored in a memory in the microcomputer, and a time table stored in the memory of the microcomputer so as to start up at a predetermined angular acceleration without a slip, for example, a curve B, is provided. It can be controlled to achieve a safe drive, especially at the start of rotation. Further, the above detection circuit has been described by using an example in which the drive current waveform of the Hall motor is used. However, the rotation acceleration of the motor can be detected by detecting the output timing difference of the Hall element.
【００１２】[0012]
【発明の効果】本発明によると起動時のモータ駆動回路
の波形変化を検出しモータ負荷の異常を検出するように
したので少ない起動回転範囲内で直にモータによる加速
を停止することができる。According to the present invention, since a change in the waveform of the motor drive circuit at the time of starting is detected to detect an abnormality in the motor load, acceleration by the motor can be stopped directly within a small starting rotation range.
【図１】本発明の一実施例を示すブロック図。FIG. 1 is a block diagram showing one embodiment of the present invention.
【図２】検出波形を説明する図。FIG. 2 is a diagram illustrating a detection waveform.
【図３】検出フローチャート。FIG. 3 is a detection flowchart.
【図４】角加速度を示す図。FIG. 4 is a diagram showing angular acceleration.
１ ホールモータ ２ ホールモータドライブ回路 ３ 波形整形回路 ４ マイコン ５ スピンドルサーボ回路 1 Hall motor 2 Hall motor drive circuit 3 Waveform shaping circuit 4 Microcomputer 5 Spindle servo circuit
Claims (3)
ライザを装着し再生する光ディスク再生装置において、
光ディスクが装着されたターンテーブルを回転駆動する
モータ駆動回路と、該モータ駆動回路の出力から起動時
にターンテーブルに加わる回転負荷の異常を検出する手
段と、異常が検出されたとき起動を停止する手段を具備
することを特徴とする光ディスク再生装置。An optical disk reproducing apparatus for mounting and reproducing an optical disk and a stabilizer on a turntable,
A motor drive circuit for rotatingly driving a turntable on which an optical disc is mounted, a means for detecting an abnormality in a rotational load applied to the turntable at the time of startup from an output of the motor drive circuit, and a means for stopping the startup when an abnormality is detected An optical disc reproducing apparatus comprising:
ライザを装着し再生する光ディスク再生装置において、
スピンドルサーボしてターンテーブルを回転するモータ
駆動回路と、スピンドルサーボを検出するホール素子
と、ホール素子の検出出力から角加速度を演算し回転負
荷の異常を判別する手段と、異常が検出されたとき加速
制御を停止する手段を具備することを特徴とする光ディ
スク再生装置。2. An optical disk reproducing apparatus for mounting and reproducing an optical disk and a stabilizer on a turntable,
A motor drive circuit for rotating the turntable by spindle servo, a hall element for detecting the spindle servo, a means for calculating an angular acceleration from a detection output of the hall element to determine an abnormality in the rotational load, and when an abnormality is detected. An optical disc reproducing apparatus comprising means for stopping acceleration control.
別し予め決められた回転数に一定の時間内にターンテー
ブルの回転を立上げるようにモータ駆動出力を制御する
ようにした請求項１又は２に記載の光ディスク再生装
置。3. The motor drive output according to claim 1, wherein the abnormality of the rotational load is determined by an angular acceleration, and the motor drive output is controlled so as to start the rotation of the turntable within a predetermined time at a predetermined rotational speed. 3. The optical disk reproducing device according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6047680A JP2652942B2 (en) | 1994-02-22 | 1994-02-22 | Optical disc playback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6047680A JP2652942B2 (en) | 1994-02-22 | 1994-02-22 | Optical disc playback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07235123A JPH07235123A (en) | 1995-09-05 |
| JP2652942B2 true JP2652942B2 (en) | 1997-09-10 |
Family
ID=12782003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6047680A Expired - Fee Related JP2652942B2 (en) | 1994-02-22 | 1994-02-22 | Optical disc playback device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2652942B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111531341A (en) * | 2020-04-27 | 2020-08-14 | 中山市飞速智能装备有限公司 | Spring detection reversing mechanism for automatic perfume pump assembling machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133078A (en) * | 1984-12-03 | 1986-06-20 | Nec Corp | Disk device |
| JP3014769U (en) * | 1995-02-15 | 1995-08-15 | 株式会社曽根工具製作所 | Steel rod cutting equipment |
-
1994
- 1994-02-22 JP JP6047680A patent/JP2652942B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07235123A (en) | 1995-09-05 |
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|---|---|---|---|
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|
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| S111 | Request for change of ownership or part of ownership |
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| LAPS | Cancellation because of no payment of annual fees |