JPS6146902B2 - - Google Patents
Info
- Publication number
- JPS6146902B2 JPS6146902B2 JP54168367A JP16836779A JPS6146902B2 JP S6146902 B2 JPS6146902 B2 JP S6146902B2 JP 54168367 A JP54168367 A JP 54168367A JP 16836779 A JP16836779 A JP 16836779A JP S6146902 B2 JPS6146902 B2 JP S6146902B2
- Authority
- JP
- Japan
- Prior art keywords
- needle
- arm
- pick
- signal
- controlling
- 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
Links
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 1
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
Description
【発明の詳細な説明】
本発明はデオデイスクプレーヤのアーム送り装
置、特にその制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an arm feeding device for a disc player, and more particularly to a control device thereof.
従来のビデオデイスクプレーヤのアーム送り装
置および針制御部の系統図を第１図に示す。図に
おいてビデオデイスク１上の記録信号をピツクア
ツプ針２ａでピツクアツプする。ピツクアツプし
た信号は映像信号（音声信号を含む）とピツクア
ツプ針２ａがビデオデイスク１の記録信号トラツ
クをトラツクずれなく走査するためのトラツク信
号とを含む。信号処理回路５ではこれら２つの信
号をバンドパスフイルタ等で分離し、映像信号は
映像回路６に伝送される。映像回路６はビデオデ
イスク１に記録された信号をブラウン管上に写し
出すための処理を行う。一方、トラツク信号は針
制御回路７に伝送され、コイル駆動回路８で針制
御コル９を駆動し、磁石４の吸引反発を利用し
て、支持棒３の一点３ａ支点としてカンチレバー
２を動かし、ピツクアツプ針２ａがビデオデイス
ク１上に記録された信号をトラツクずれ無く再生
するように制御を行つている。 FIG. 1 shows a system diagram of the arm feeding device and needle control section of a conventional video disc player. In the figure, a recorded signal on a video disc 1 is picked up by a pick-up needle 2a. The picked-up signals include a video signal (including an audio signal) and a track signal for allowing the pick-up needle 2a to scan the recording signal track of the video disk 1 without track deviation. In the signal processing circuit 5, these two signals are separated using a band pass filter or the like, and the video signal is transmitted to the video circuit 6. The video circuit 6 performs processing for projecting the signals recorded on the video disk 1 onto a cathode ray tube. On the other hand, the track signal is transmitted to the needle control circuit 7, and the coil drive circuit 8 drives the needle control coil 9, and by using the attraction and repulsion of the magnet 4, the cantilever 2 is moved with one point 3a of the support rod 3 as a fulcrum, and the pick-up is performed. The needle 2a controls the signals recorded on the video disk 1 to be reproduced without track deviation.
一方カンチレバー２、支持棒３、磁石４、針制
御コイル９を載せているアーム１５は、パルスモ
ータ駆動回路１０でパルスモータ１１を駆動し、
減速機構１を介してプーリ１３、ベルト１４が運
動せしめられることによつて移動する。このとき
パルスモータ１１の駆動周波数を、予めピツクア
ツプ針の移動速度とアームの移動速度とが一致す
るように調整する（実際には21μｍ／sec）わけ
であるが、減速機構、負荷変動（アームに載つて
いる負荷の変動）、ベルトプーリ系のスリツプな
ど種々の原因でピツクアツプ針の移動速度とアー
ムの移動速度とに差が生じてピツクアツプ針が正
常のトラツキングができないという問題が生じ
た。この場合、ピツクアツプ針の移動量とアーム
の移動量との差が小さい範囲ではピツクアツプ針
のダイナミツクレンジによてラツキングミスを防
止できる。 On the other hand, the arm 15 carrying the cantilever 2, support rod 3, magnet 4, and needle control coil 9 drives a pulse motor 11 with a pulse motor drive circuit 10.
The pulley 13 and belt 14 are moved through the deceleration mechanism 1 to move. At this time, the driving frequency of the pulse motor 11 is adjusted in advance so that the moving speed of the pick-up needle and the moving speed of the arm match (actually 21 μm/sec), but due to Due to various reasons such as fluctuations in load placed on the pick-up needle and slippage in the belt pulley system, a difference arises between the moving speed of the pick-up needle and the moving speed of the arm, resulting in a problem that the pick-up needle cannot track normally. In this case, in a range where the difference between the amount of movement of the pick-up needle and the amount of movement of the arm is small, racking errors can be prevented by the dynamic range of the pick-up needle.
本発明の目的は上記准来技術の欠点をなくしピ
ツクアツプ針がトラツクずれを起さないようにし
た、ビデオデイスクプレーヤのアーム送り装置を
提供することである。 SUMMARY OF THE INVENTION An object of the present invention is to provide an arm feeding device for a video disc player which eliminates the drawbacks of the prior art described above and prevents the pickup needle from being out of track.
本発明によれば、ビデオデイスクプレーヤのピ
ツクアツプ針（カンチレバー）のアームに対する
位置変位量を検出し、該変位量が所定の量に達し
たときにアームの移動を開始し、且つ該変位量が
所定の量にしたときアームの移動を停止する如く
アーム送り手段の作動を制御する手段を設けたこ
とを特徴とする。 According to the present invention, the amount of positional displacement of the pick-up needle (cantilever) of a video disc player with respect to the arm is detected, and when the amount of displacement reaches a predetermined amount, the movement of the arm is started. The present invention is characterized in that means is provided for controlling the operation of the arm feeding means so as to stop the movement of the arm when the amount is reached.
本発明の実施例を第２図に示すが、第１図と同
様な部品は同一参照数字で示してある。 An embodiment of the invention is shown in FIG. 2, in which similar parts to those in FIG. 1 are designated by the same reference numerals.
前述したようにピツクアツプ針２ａで検出され
た信号のうちトラツク信号は信号処理回路５で分
離されて針制御回路７に印加され、コイル駆動回
路８で針制御コイル９を駆動し、磁石４の吸引、
反発を利用してカンチレバー２を支点３ａのまわ
りに動かして制御を行つている。 As mentioned above, among the signals detected by the pick-up needle 2a, the track signal is separated by the signal processing circuit 5 and applied to the needle control circuit 7, and the coil drive circuit 8 drives the needle control coil 9, causing the attraction of the magnet 4. ,
Control is performed by using the repulsion to move the cantilever 2 around the fulcrum 3a.
一方、アーム１５の送り手段として、パルスモ
ータ１１、減速機構１２、プーリ１３、ベルト１
４が設けてあることは第１図と同様であるが、本
実施例においてはピツクアツプ針２ａのアーム１
５に対する変位量を、針制御コイル９に流れる電
流を抵抗１６によつて電圧変化として検出する。
これをローパスフイルタ１７で高周波成分を除去
し（ピツクアツプ針２ａの直線的位置変化のみを
検出するため）、ヒステレシスコンパレータ１８
に印加する。ヒステレシスコンパレータ１８はロ
ーパスフイルタからの信号が設定電圧１９を超え
たときに出力が高いレベルとなるように動作す
る。従つてピツクアツプ針の変位量が設定値を超
えるとヒステレシスコンパレータの出力が高レベ
ルとなり、パルスモータ駆動回路０が作動せしめ
られる。パルスモータ１１が駆動されてアーム１
５は移動を開始し、ピツクアツプ針とアームの変
位量は小となる。このような動作によつてヒステ
レシスコンパレータ１８の出力は高レベルから低
レベルに反発し、パルスモータ駆動回路が停止
し、アームの移動は停止する。 On the other hand, as means for feeding the arm 15, a pulse motor 11, a reduction mechanism 12, a pulley 13, a belt 1
4 is the same as in FIG. 1, but in this embodiment, the arm 1 of the pick-up needle 2a is
The amount of displacement with respect to the needle control coil 9 is detected by a resistor 16 as a voltage change in the current flowing through the needle control coil 9.
A low-pass filter 17 removes high frequency components (to detect only linear positional changes of the pick-up needle 2a), and a hysteresis comparator 18
to be applied. The hysteresis comparator 18 operates so that the output becomes a high level when the signal from the low pass filter exceeds the set voltage 19. Therefore, when the displacement amount of the pick-up needle exceeds the set value, the output of the hysteresis comparator becomes a high level, and the pulse motor drive circuit 0 is activated. The pulse motor 11 is driven and the arm 1
5 starts moving, and the amount of displacement of the pick-up needle and arm becomes small. Due to this operation, the output of the hysteresis comparator 18 rebounds from a high level to a low level, the pulse motor drive circuit is stopped, and the movement of the arm is stopped.
以上の動作がくりかえされ、ピツクアツプ針は
トラツクずれを超すことなく、常に正常なトラツ
キングを行なうことができる。 The above operation is repeated, and the pick-up needle can always perform normal tracking without exceeding the track deviation.
主要部の動作波形を第３図ａ〜第３図ｃに示
す。第３図ａは抵抗１６の電圧で、ピツクアツプ
針の変位量とトラツク信号の高周波成分とが含ま
れている。第３図ｂはローパスフイルタ１７の出
力信号で、高周波成分が除去され、アームの直流
的変化が示されている。＋E1、−E1はヒスデレシ
スコンパレータの設定電圧である。第３図ｃはヒ
ステレシスコンパレータ１８の出力電圧であり、
設定電圧を超えると高レベルとなるように動作す
る。 The operating waveforms of the main parts are shown in FIGS. 3a to 3c. FIG. 3a shows the voltage across the resistor 16, which includes the amount of displacement of the pickup needle and the high frequency component of the track signal. FIG. 3b shows the output signal of the low-pass filter 17, from which high frequency components are removed, and shows the direct current variation of the arm. +E 1 and −E 1 are the setting voltages of the hysteresis comparator. FIG. 3c shows the output voltage of the hysteresis comparator 18,
It operates at a high level when the set voltage is exceeded.
上述方法でトラツクずれを防止することができ
るが、この場合、ヒステレシスコンパレータの設
定電圧をピツクアツプ針のダイナミツクレンジ以
内に設定することと、パルスモータによるアーム
の移動速度をピツクアツプ針の移動速度よりも早
く設定することとが重要である。例えばビツクア
ツプ針のダイナミツクレンジが±１mmであればヒ
ステレシスコンパレータの設定電圧は±0.5mm程
度となるように設定する。またピツクアツプ針の
移動速度が21μｍ／secであればアームの移動速
度は50〜100μｍ／sec程度とする。トリツクプレ
ー等で５倍速再生を行う場合には、ピツクアツプ
針は105μｍ／secで移動するため、パルスモータ
の駆動周波数を高く設定して且つ駆動機構系のロ
スを吸収できるように、アームが150μｍ／sec程
度で移動できるように設定する。 Track deviation can be prevented by the method described above, but in this case, the setting voltage of the hysteresis comparator must be set within the dynamic range of the pick-up needle, and the moving speed of the arm by the pulse motor must be set higher than the moving speed of the pick-up needle. It is important to set it up early. For example, if the dynamic range of the pickup needle is ±1 mm, the set voltage of the hysteresis comparator is set to approximately ±0.5 mm. Further, if the moving speed of the pick-up needle is 21 μm/sec, the moving speed of the arm is about 50 to 100 μm/sec. When performing 5x speed playback using trick play, etc., the pick-up needle moves at 105 μm/sec, so the drive frequency of the pulse motor is set high and the arm is moved at 150 μm/sec to absorb loss in the drive mechanism system. Set it so that it can move in about sec.
なお、本発明の制御方法によれば駆動源として
パルスモータに代えて安価な直流モータ、交流モ
ータを使用することもできる。 Note that according to the control method of the present invention, an inexpensive DC motor or AC motor can be used as the drive source instead of the pulse motor.
以上述べたように本発明によればピツクアツプ
針とアームとの移動量に大きな差が生じてピツク
アツプ針がトラツキングずれを起すという問題が
解決でき、信頼性の高いビデオデイスクプレーヤ
のアーム送り装置が得られる。 As described above, according to the present invention, it is possible to solve the problem of a large difference in the amount of movement between the pick-up needle and the arm, causing tracking deviation of the pick-up needle, and to obtain a highly reliable arm feeder for a video disc player. It will be done.
第１図は従来のビデオデイスクプレーヤのアー
ム送り装置および針制御装置を示す概略ブロツク
図。第２図は本発明の実施例を示す概略ブロツク
図。第３図ａないし第３図ｃは主要部の動作波形
を示す信号波形図。
１…ビデオデイスク、２…カンチレバー、２ａ
…ピツクアツプ針、３…支持棒、３ａ…支点、４
…磁石、５…信号処理回路、６…映像回路、７…
針制御回路、８…コイル駆動回路、９…針制御コ
イル、１０…モータ駆動回路、１１…パルスモー
タ、１２…減速機構、１３…プーリ、１４…ベル
ト、１５…アーム、１６…抵抗、１７…ローパス
フイルタ、１８…ヒステレンシスコンパレータ。
FIG. 1 is a schematic block diagram showing an arm feeding device and needle control device of a conventional video disc player. FIG. 2 is a schematic block diagram showing an embodiment of the present invention. FIGS. 3a to 3c are signal waveform diagrams showing operating waveforms of main parts. 1...video disk, 2...cantilever, 2a
...Pick-up needle, 3...Support rod, 3a...Fully point, 4
...Magnet, 5...Signal processing circuit, 6...Video circuit, 7...
Needle control circuit, 8... Coil drive circuit, 9... Needle control coil, 10... Motor drive circuit, 11... Pulse motor, 12... Reduction mechanism, 13... Pulley, 14... Belt, 15... Arm, 16... Resistor, 17... Low pass filter, 18... Hysteresis comparator.
Claims (1)
信号トラツクにピツクアツプ針を対接させて記録
された情報信号を再生するビデオデイスクプレー
ヤにおいて、前記ピツクアツプ針を保持し移動す
るアーム送り手段と、該ピツクアツプ針が信号ト
ラツク上をトレースするようにピツクアツプ針の
位置を制御するトラツキング制御手段とを有する
とともに、ピツクアツプ針のアームに対する位置
変位量を、上記トラツキング制御手段の誤差信号
から低域成分を抽出して検出する手段と、この変
位量が第一の所定の量となつたときにアームを移
動せしめ、前記変位量が第一の所定量より小さい
第二の所定の量となつたとき該アームの移動を停
止せしめる如く前記アーム送り手段の作動を制御
する手段を設けアームを間欠送りするようにした
ことを特徴とするビデオデイスクプレーヤのアー
ム送り装置。1. In a video disc player that plays back information signals recorded by rotating a disc-shaped recording medium and bringing a pick-up needle into contact with a signal track on the recording medium, an arm feeding means for holding and moving the pick-up needle; , a tracking control means for controlling the position of the pick-up needle so that the pick-up needle traces the signal track, and a tracking control means for controlling the position of the pick-up needle with respect to the arm, and extracting a low frequency component from the error signal of the tracking control means. a means for extracting and detecting; and a means for moving the arm when the displacement amount reaches a first predetermined amount, and when the displacement amount reaches a second predetermined amount smaller than the first predetermined amount. 1. An arm feeding device for a video disc player, characterized in that the arm is moved intermittently by means for controlling the operation of the arm feeding device so as to stop the movement of the arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16836779A JPS5693144A (en) | 1979-12-26 | 1979-12-26 | Arm sending device of video disk player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16836779A JPS5693144A (en) | 1979-12-26 | 1979-12-26 | Arm sending device of video disk player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5693144A JPS5693144A (en) | 1981-07-28 |
| JPS6146902B2 true JPS6146902B2 (en) | 1986-10-16 |
Family
ID=15866767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16836779A Granted JPS5693144A (en) | 1979-12-26 | 1979-12-26 | Arm sending device of video disk player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5693144A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5823363A (en) * | 1981-07-30 | 1983-02-12 | Akai Electric Co Ltd | Radial feed servo system in disc player |
| JPH0739042Y2 (en) * | 1982-01-25 | 1995-09-06 | 株式会社三協精機製作所 | Record player |
| JPS58166567A (en) * | 1982-03-26 | 1983-10-01 | Matsushita Electric Ind Co Ltd | Retrieving device of information track |
| JPS59116972A (en) * | 1982-12-23 | 1984-07-06 | Olympus Optical Co Ltd | Operation center detecting device of actuator |
| US4614986A (en) * | 1983-10-31 | 1986-09-30 | Labudde Edward V | Magnetic servo with improved tracking system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5491306A (en) * | 1977-12-28 | 1979-07-19 | Victor Co Of Japan Ltd | Automatic feed follower of information signal reproducer |
-
1979
- 1979-12-26 JP JP16836779A patent/JPS5693144A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5491306A (en) * | 1977-12-28 | 1979-07-19 | Victor Co Of Japan Ltd | Automatic feed follower of information signal reproducer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5693144A (en) | 1981-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6146902B2 (en) | ||
| JPH0481834B2 (en) | ||
| JPS6346907B2 (en) | ||
| US4954909A (en) | Data memorizing device which determines the movement of the recording head | |
| JPH0199486A (en) | Linear motor controller for pick-up driving | |
| JPH04137275A (en) | Speed detection device for pickup | |
| JPS6138540B2 (en) | ||
| JPS6315667B2 (en) | ||
| JPS6226849Y2 (en) | ||
| JPS592262A (en) | Transfer device of pickup means of reproducer | |
| JPS6141065B2 (en) | ||
| JPS63298732A (en) | Information signal reproducing device | |
| SU1171844A1 (en) | Device for autotracking video tape recorder | |
| JPH0570229B2 (en) | ||
| JP2629350B2 (en) | Magnetic recording / reproducing device | |
| JPS6215902Y2 (en) | ||
| JPH0424782B2 (en) | ||
| JPH0329775Y2 (en) | ||
| JPS61187174A (en) | Recording information reproducing device | |
| KR940004493B1 (en) | Autotracking device and processing method thereof for vcr | |
| JPH0235364B2 (en) | JIKIKAATORITSUJI * TEEPUNOHETSUDO * TATSUCHISEIGYOHOSHIKI | |
| JP2553542B2 (en) | Information recording disk playback device | |
| JPH0763225B2 (en) | Feed drive device | |
| JPS647428B2 (en) | ||
| JPH0512688A (en) | Information recording and reproducing device |