JPS6155174B2 - - Google Patents
Info
- Publication number
- JPS6155174B2 JPS6155174B2 JP53047008A JP4700878A JPS6155174B2 JP S6155174 B2 JPS6155174 B2 JP S6155174B2 JP 53047008 A JP53047008 A JP 53047008A JP 4700878 A JP4700878 A JP 4700878A JP S6155174 B2 JPS6155174 B2 JP S6155174B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- rotating
- recording
- head
- track
- 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
- 238000001514 detection method Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition 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
- G11B5/58—Disposition 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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/584—Disposition 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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
- G11B5/588—Disposition 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 for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads
Description
【発明の詳細な説明】
本発明は回転磁気ヘツドによつて磁気テープの
長手方向に対してある傾斜角度を持つた記録軌跡
として順次信号を記録再生する回転ヘツド型磁気
記録再生装置に関するもので、記録時に記録され
た信号トラツクを再生時において忠実にトレース
するためのトラツキング制御を良好に行えるよう
構成したものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating head type magnetic recording and reproducing device that sequentially records and reproduces signals as a recording trajectory having a certain inclination angle with respect to the longitudinal direction of a magnetic tape using a rotating magnetic head. The structure is such that tracking control for faithfully tracing a signal track recorded during recording during reproduction can be performed satisfactorily.
第１図に従来の磁気記録再生装置の概略を示
す。第１図に於いて磁気テープ１は矢印の方向に
一定速度でキヤプスタン（図示せず）により走行
されており、電動機２の回転軸に固着された回転
デイスク３に装着された磁気ヘツド４により磁気
テープ１上にその長手方向とある傾斜角度を有す
る記録トラツク５として信号が記録される。第１
図に於いては、記録時には端子６に印加された記
録すべきテレビジヨン信号の垂直同期信号を分周
回路８により1/2分周した信号（30Hz）と、磁気
ヘツド４の回転位相を検出する検出装置７よりの
信号を位相比較回路９により比較し、その差異に
応じて駆動制御回路１０を介して電動機２を制御
して磁気ヘツド４の回転が垂直同期信号と同期す
るようにすると共に、固定の磁気ヘツド１１によ
り磁気テープ１の一端に前記垂直同期信号に関連
した信号をコントロール信号として軌跡１２のよ
うに記録する。再生時に於いては、磁気ヘツド４
が記録した信号トラツク５上を走行して信号を再
生するようにトラツキング制御が行なわれる。即
ち記録時に記録されたコントロール信号１２を磁
気ヘツド１１で再生した信号と磁気ヘツド４の回
転位相を検出する検出装置７の出力信号を位相比
較器９により位相比較し、駆動制御回路１０によ
り電動機２を制御し、磁気ヘツド４と磁気テープ
１の相対位置関係を制御して記録時と同一軌跡上
を磁気ヘツド４がトレースするようにトラツキン
グ制御を行う。しかしながら磁気テープ１上に記
録された信号の記録軌跡５はテープ走行時のテー
プ巾上のテンシユンむらやテープ走行むら等によ
り真直ぐな直線とはならず例えば第２図の実線１
ａにて示すような曲がりを持つた軌跡となる。こ
の曲がり方は各々の装置により又装置の使用状
態、環境等により異なつた特徴を有するため従来
のトラツキング制御方式では第２図１ｂのような
軌跡の記録トラツクを例えば点線１ａで示したよ
うな曲がりの特徴を有するトラツクとして平均的
にトレースしているに過ぎない。従つて部分的に
トラツクずれを生じる部分が存在し、再生信号出
力の低下をきたし、場合によつては再生信号品質
の悪化をきたす時があつた。機器の設計、製造に
おいては走行機構精度を上げてトラツク軌跡の曲
がり量を少なくし、部分的なトラツクずれ量を少
なくすると共にトラツク巾の仕様設定にはこのト
ラツク曲がり量を考慮して決定することにより再
生品質の劣化を防止していた。しかしながら最近
は磁気ヘツドの性能向上とテープ使用率の向上の
ためトラツク巾は増々狭くなる傾向にあり、機構
精度を上げて再生時の良好なトラツキング状態を
得るのが困難になりつつある。本発明は狭トラツ
ク巾時においても機構精度を上げることなく例え
記録トラツク軌跡が独特な曲がつたトラツク形状
を有していてもトラツク軌跡の部分的なずれを生
じることなく最適な再生トラツキング状態を得る
ものである。 FIG. 1 shows an outline of a conventional magnetic recording/reproducing device. In FIG. 1, a magnetic tape 1 is running at a constant speed in the direction of the arrow by a capstan (not shown), and is magnetized by a magnetic head 4 attached to a rotating disk 3 fixed to the rotating shaft of an electric motor 2. A signal is recorded on the tape 1 as a recording track 5 having a certain inclination angle with respect to its longitudinal direction. 1st
In the figure, during recording, a signal (30 Hz) obtained by dividing the vertical synchronizing signal of the television signal to be recorded, which is applied to the terminal 6, into 1/2 by the frequency dividing circuit 8, and the rotational phase of the magnetic head 4 are detected. The signals from the detection device 7 are compared by the phase comparison circuit 9, and the electric motor 2 is controlled via the drive control circuit 10 according to the difference so that the rotation of the magnetic head 4 is synchronized with the vertical synchronization signal. , a fixed magnetic head 11 records a signal related to the vertical synchronization signal on one end of the magnetic tape 1 as a control signal as a trace 12. During playback, the magnetic head 4
Tracking control is performed to reproduce the signal by running on the recorded signal track 5. That is, the phase comparator 9 compares the phase of a signal obtained by reproducing the control signal 12 recorded during recording with the magnetic head 11 and the output signal of the detection device 7 for detecting the rotational phase of the magnetic head 4, and the drive control circuit 10 compares the phase of the output signal of the detection device 7 for detecting the rotational phase of the magnetic head 4. tracking control is performed by controlling the relative positional relationship between the magnetic head 4 and the magnetic tape 1 so that the magnetic head 4 traces the same trajectory as during recording. However, the recording locus 5 of the signal recorded on the magnetic tape 1 is not a straight line due to uneven tension on the tape width during tape running, uneven tape running, etc. For example, the solid line 1 in FIG.
The trajectory will have a curve as shown in a. The way this curve curves has different characteristics depending on each device, the usage condition of the device, the environment, etc. Therefore, in the conventional tracking control method, the recording track of the locus shown in FIG. This is merely an average trace of a track with the following characteristics. Therefore, there are some parts where track deviation occurs, resulting in a reduction in the output of the reproduced signal and, in some cases, deterioration of the quality of the reproduced signal. When designing and manufacturing equipment, increase the precision of the traveling mechanism to reduce the amount of bend in the track locus, reduce the amount of partial track deviation, and take this amount of track bend into account when setting track width specifications. This prevents deterioration of playback quality. However, in recent years, track widths have tended to become narrower due to improvements in the performance of magnetic heads and increased tape usage rates, making it difficult to improve mechanical precision and obtain good tracking conditions during playback. The present invention provides an optimal reproduction tracking state even when the track width is narrow, without increasing the mechanical precision, and without causing partial deviation of the track trajectory even if the recording track trajectory has a unique curved track shape. It's something you get.
第３図に本発明の磁気記録再生装置の概略図を
示す。磁気テープ１は記録、再生時において下ガ
イドドラム１５、上ガイドドラム１５′にほぼ180
゜分（１ヘツドの場合は360゜分）巻き付けられ
て矢印の方向に一定速度で走行されており、回転
デイスク１６に取付けられた磁気ヘツド１７に回
転トランス１８より情報信号を供給して、磁気テ
ープ１上にその長手方向に対して一定の傾斜角度
を持つた記録トラツク１９として信号を記録す
る。磁気ヘツド１７を取付けた回転デイスク１６
は電磁気的な力を利用した電気・機械変換素子２
０に装着されており、この電気・機械変換素子２
０は保持部材２１により電動機２２の回転軸２３
に機械的に結合されている。従つて磁気ヘツド１
７は電動機の回転軸２３と同一に回転する。映像
信号を記録再生する場合には再生時のヘツドスイ
ツチングノイズをテレビ画面上見えない位置とす
るために、記録時に於いては磁気ヘツド１７の回
転位相を、端子２４に加えられる垂直同期信号に
同期して駆動する必要があるため、スイツチSW1
をＲ端子に接続して、分周回路２５により1/2分
周（30Hz）した信号と電動機２２の回転位相を検
出するための回転位相検出装置２６により得られ
る信号とを位相比較回路２７により比較し、駆動
制御回路２８により電動機２２、即ち磁気ヘツド
１７の回転を制御する。再生時に於いてはスイツ
チSW1はＰ端子に接続され、位相比較回路２７に
は30Hzの基準発振器２９の出力が加えられ、電動
機２２は記録時とほぼ同一の回転数で回転させら
れる。記録されたトラツク１９は第２図に示した
如くテープ巾方向のテンシヨンむらや走行むらに
より曲がりを生じている。再生時に於て記録トラ
ツクの曲がりにも忠実に磁気ヘツド１７が記録ト
ラツク１９をトレース（トラツキング）するため
には記録トラツクを時々刻々検出し、その検出信
号に従つて磁気ヘツド１７を実線矢印の方向（電
動機２２の回転軸２３と平行な方向）に可動して
やればよい。本実施例に於いては磁気ヘツド１７
により再生した記録トラツク１９の信号を公知の
回転トランス１８を経て取り出し、記録トラツク
１９と磁気ヘツド１７の走行位置との誤差を検出
するトラツク位置検出回路３０の入力端子３１に
印加する。トラツク位置検出回路３０の出力はス
イツチSW2のＰ端子を経てトラツキング駆動制御
回路３２に加えられる。トラツキング駆動制御回
路３２の出力はブラシ３３、スリツプリング３４
を経て電磁気力を利用した電気機械変換素子２０
に加えられ、記録トラツク１９と磁気ヘツド１７
の走行位置関係を連続的に制御して、磁気ヘツド
１７を曲がつた軌跡の記録トラツク１９にも忠実
にトラツキングするよう制御する。従つて第２図
の実線で示したような曲がつた傾向を持つた記録
トラツク軌跡を再生時には磁気ヘツドが同一の曲
がつた実線トラツクとしてトレースするため部分
的なトラツクずれがなく最良の再生信号を得るこ
とができる。トラツク位置検出回路３０としては
電気・機械変換素子２０に高い周波数信号を加
え、磁気ヘツドを上下（実線矢印方向）に微少振
動させて、磁気ヘツドの周波数変調された再生信
号のエンベロープの変化を前記周波数信号により
同期整流して磁気ヘツド位置と記録トラツクとの
位置ずれを検出する方法を使用することが出来
る。第３図の端子３１′は上記の高い周波数信号
を印加する端子である。尚記録時においてはバイ
アス回路３５の出力をスイツチSW2、トラツキン
グ駆動制御回路３２、ブラシ３３、スリツプリン
グ３４を経て電気・機械変換素子２０に加えるこ
とにより、磁気ヘツド１７を一定位置に固定し、
磁気ヘツド１７の回転時に生ずる振動等により磁
気ヘツド１７が微動するのを防止すると共に複数
個の磁気ヘツド１７を使用する場合には各磁気ヘ
ツドの相対高さ位置を固定設定する。 FIG. 3 shows a schematic diagram of the magnetic recording/reproducing apparatus of the present invention. The magnetic tape 1 is placed on the lower guide drum 15 and the upper guide drum 15' at approximately 180 degrees during recording and playback.
The magnetic head is wound around the head for 360 degrees (360 degrees in the case of one head) and runs at a constant speed in the direction of the arrow. Information signals are supplied from the rotating transformer 18 to the magnetic head 17 attached to the rotating disk 16, and the magnetic head is A signal is recorded on the tape 1 as a recording track 19 having a constant inclination angle with respect to its longitudinal direction. Rotating disk 16 with magnetic head 17 attached
is an electrical/mechanical conversion element 2 that uses electromagnetic force.
This electrical/mechanical conversion element 2
0 is the rotating shaft 23 of the electric motor 22 by the holding member 21.
mechanically coupled to. Therefore, magnetic head 1
7 rotates in the same manner as the rotating shaft 23 of the electric motor. When recording and reproducing video signals, the rotational phase of the magnetic head 17 is adjusted to the vertical synchronization signal applied to the terminal 24 during recording in order to make the head switching noise at the time of reproduction invisible on the TV screen. Since it is necessary to drive synchronously, switch SW 1
is connected to the R terminal, and the signal obtained by dividing the frequency by 1/2 (30Hz) by the frequency dividing circuit 25 and the signal obtained by the rotational phase detection device 26 for detecting the rotational phase of the electric motor 22 is connected to the phase comparison circuit 27. In comparison, the drive control circuit 28 controls the rotation of the electric motor 22, that is, the magnetic head 17. During reproduction, the switch SW1 is connected to the P terminal, the output of the 30 Hz reference oscillator 29 is applied to the phase comparator circuit 27, and the motor 22 is rotated at almost the same number of rotations as during recording. As shown in FIG. 2, the recorded track 19 is bent due to tension unevenness and running unevenness in the width direction of the tape. In order for the magnetic head 17 to trace (track) the recording track 19 faithfully even when the recording track curves during reproduction, the recording track is detected moment by moment, and the magnetic head 17 is moved in the direction of the solid line arrow according to the detection signal. It is only necessary to move it in the direction parallel to the rotating shaft 23 of the electric motor 22. In this embodiment, the magnetic head 17
A signal from the recording track 19 reproduced by the recording track 19 is taken out through a known rotary transformer 18 and applied to an input terminal 31 of a track position detection circuit 30 for detecting an error between the recording track 19 and the traveling position of the magnetic head 17. The output of the track position detection circuit 30 is applied to the tracking drive control circuit 32 via the P terminal of the switch SW2 . The output of the tracking drive control circuit 32 is a brush 33 and a slip ring 34.
Electromechanical conversion element 20 that uses electromagnetic force through
, a recording track 19 and a magnetic head 17
The magnetic head 17 is controlled to faithfully track the recording track 19 having a curved trajectory by continuously controlling the traveling positional relationship of the magnetic head 17. Therefore, when reproducing a recording track locus that has a tendency to curve as shown by the solid line in FIG. 2, the magnetic head traces it as the same curved solid line track, so there is no partial track deviation and the best reproduction signal is obtained. can be obtained. The track position detection circuit 30 applies a high frequency signal to the electro-mechanical transducer 20, slightly vibrates the magnetic head up and down (in the direction of the solid line arrow), and detects the change in the envelope of the frequency-modulated reproduction signal of the magnetic head. A method of detecting the positional deviation between the magnetic head position and the recording track by synchronous rectification using a frequency signal can be used. Terminal 31' in FIG. 3 is a terminal to which the above-mentioned high frequency signal is applied. During recording, the magnetic head 17 is fixed at a fixed position by applying the output of the bias circuit 35 to the electromechanical transducer 20 via the switch SW 2 , the tracking drive control circuit 32, the brush 33, and the slip ring 34.
This prevents the magnetic head 17 from moving slightly due to vibrations generated when the magnetic head 17 rotates, and when a plurality of magnetic heads 17 are used, the relative height position of each magnetic head is fixed.
第４図に第３図の本発明の実施例に使用でき
る。電磁気力を利用した電気・機械変換素子２０
としてのボイスコイル型アクチユエータの一実施
例の概略図を示す。２３は電動機２２の回転軸で
あり、４０はボイスコイル型アクチユエータ４１
を電動機の回転軸２３に取付けるための保持部材
である。ボイスコイル型アクチユエータ４１はセ
ンターポール４２、永久磁石４３、ヨーク４４、
空隙４５により磁気回路を構成し、磁気回路の空
隙４５中にコイル４６を有するボイスコイル４７
の一部を位置させ、コイル４６にブラシ（図示せ
ず）からスリツプリング３４を経て電流を流して
駆動力を得るものである。ボイスコイル４６には
磁気ヘツド１７を装着した回転デイスク１６が固
着されている。ボイスコイル４６に発生した駆動
力はボイスコイル４６を上下方向（電動機の回転
軸にそつた方向）に移動させるが、ボイスコイル
４６にはヨーク４４に取付けられたバネ取付部材
４８に固定された板バネ部材４９が取付けられて
いるためバネ部材４９の弾性力と発生した駆動力
がバランスする位置までボイスコイル４６を、従
つて磁気ヘツド１７を実線矢印方向に移動させ
る。スリツプリング３４を通じてトラツク位置検
出回路３０の出力をコイル４６に印加すればトラ
ツク位置検出回路３０の出力に応じて磁気ヘツド
１７が矢印方向に移動しトラツキングずれを補正
しながら記録トラツクの曲がりにも忠実にトラツ
キングする。又５０は記録時に回転デイスク１６
を一定位置に固定し、磁気ヘツド１７が一定の所
定位置になるように位置規制すると共に、記録時
に磁気ヘツド１７が機械的な振動等により揺動す
ることを防止するためのロツク部材である。この
ロツク部材５０への位置規制は第３図のバイアス
回路３５によりコイル４６に一定のバイアス電流
を流してボイスコイルを付勢し、回転デイスク１
６をロツク部材５０に当接する位置まで移動する
とともに、保持するための圧接力を加えて行う。 FIG. 4 can be used in the embodiment of the invention of FIG. Electrical/mechanical conversion element 20 using electromagnetic force
1 shows a schematic diagram of an embodiment of a voice coil type actuator. 23 is a rotating shaft of the electric motor 22, and 40 is a voice coil type actuator 41.
This is a holding member for attaching the motor to the rotating shaft 23 of the electric motor. The voice coil type actuator 41 includes a center pole 42, a permanent magnet 43, a yoke 44,
A voice coil 47 that constitutes a magnetic circuit by the air gap 45 and has a coil 46 in the air gap 45 of the magnetic circuit.
A current is applied to the coil 46 from a brush (not shown) through the slip ring 34 to obtain driving force. A rotary disk 16 having a magnetic head 17 mounted thereon is fixed to the voice coil 46 . The driving force generated in the voice coil 46 moves the voice coil 46 in the vertical direction (direction along the rotation axis of the electric motor). Since the spring member 49 is attached, the voice coil 46 and therefore the magnetic head 17 are moved in the direction of the solid arrow until the elastic force of the spring member 49 and the generated driving force are balanced. When the output of the track position detection circuit 30 is applied to the coil 46 through the slip ring 34, the magnetic head 17 moves in the direction of the arrow in response to the output of the track position detection circuit 30, correcting the tracking deviation and faithfully correcting the bending of the recording track. Tracking. Also, 50 is a rotating disk 16 during recording.
This is a locking member that fixes the magnetic head 17 at a fixed position, regulates the position of the magnetic head 17 so that it is at a fixed predetermined position, and prevents the magnetic head 17 from swinging due to mechanical vibration or the like during recording. The position of the locking member 50 is controlled by applying a constant bias current to the coil 46 by the bias circuit 35 shown in FIG.
6 to a position where it abuts against the lock member 50, and a pressing force is applied to hold the lock member 50.
又第５図に本発明に使用可能なボイスコイル型
アクチユエータの別の実施例を示す。第４図と同
一物は同一番号で示す。本例ではセンターポール
４２に上ガイドドラム取付円板５１を取付け、上
ガイドドラム取付円板５１に上ガイドドラム５２
を固着した構造となつており、テープをほぼ180
゜分（１ヘツドの場合はほぼ360度分）巻き付け
て走行させる案内ドラムの上部部分が電動機の回
転軸２３と同一に回転するもので、テープと上ガ
イドドラム部とに空気層を生じ、テープと上ガイ
ドドラム間の摩擦力を減少するとともに、案内ド
ラム部でのテープ走行を安定せしめることができ
る。尚５３は固定の下ガイドドラムである。本例
においてはスリツプリング３４は保持部材４０の
下部に取付けてある。 Further, FIG. 5 shows another embodiment of a voice coil type actuator that can be used in the present invention. Components that are the same as those in FIG. 4 are designated by the same numbers. In this example, the upper guide drum mounting disc 51 is attached to the center pole 42, and the upper guide drum 52 is attached to the upper guide drum mounting disc 51.
It has a structure in which the tape is fixed at approximately 180 degrees.
The upper part of the guide drum around which the tape is wound and travels (approximately 360 degrees in the case of one head) rotates at the same time as the rotating shaft 23 of the electric motor, creating an air layer between the tape and the upper guide drum, It is possible to reduce the frictional force between the upper guide drum and the upper guide drum, and to stabilize the tape running on the guide drum section. Note that 53 is a fixed lower guide drum. In this example, the slip ring 34 is attached to the lower part of the holding member 40.
以上述べた実施例においては回転２ヘツド方式
の磁気記録再生装置について説明したが１ヘツド
方式及び２個以上のヘツドを使用する方式におい
ても使用しえることは云うまでもない。又第３図
の説明においてはコントロール信号をテープの一
端に記録しない方式について説明したが、第１図
で述べたように記録時にテープにコントロール信
号を記録しておき、再生時においては電動機を従
来公知のように再生コントロール信号に同期して
駆動し、従来例のように平均的なトラツキングを
行うと共に、記録トラツクの曲がりなどの変動部
分をボイスコイル型アクチユエータにより磁気ヘ
ツドを微動させて追随させるようにしてもよい。
この場合にはボイスコイル型アクチユエータの可
動範囲が狭くてよいためアクチユエータを小型に
することが出来る。又本説明においては磁気ヘツ
ドを直接電動機で回転駆動する構成につき記述し
たが、磁気ヘツドを従来公知のベルト及びプーリ
を通して電動機から間接的に回転駆動するような
構成としてもよい。 In the embodiments described above, a magnetic recording/reproducing apparatus of a two-head rotating type has been described, but it goes without saying that it can also be used in a one-head type or a type using two or more heads. In addition, in the explanation of Fig. 3, we explained a method in which the control signal is not recorded on one end of the tape, but as described in Fig. 1, the control signal is recorded on the tape during recording, and during playback, the electric motor is As is well known, the magnetic head is driven in synchronization with a playback control signal to perform average tracking as in the conventional example, and also uses a voice coil type actuator to slightly move the magnetic head to follow fluctuations such as curves in the recording track. You can also do this.
In this case, the movable range of the voice coil type actuator may be narrow, so the actuator can be made smaller. Further, in this description, a configuration has been described in which the magnetic head is directly rotationally driven by an electric motor, but a configuration in which the magnetic head is indirectly rotationally driven from an electric motor through a conventionally known belt and pulley may be used.
以上のように本発明によれば機械的な精度を上
げることなく、磁気記録再生装置の自己記録再生
時及び機器相互間の互換再生時のトラツキングを
良好にすることができ、最良のトラツキング状態
による最良の記録信号再生を実施することが可能
となり、最良の再生信号品質を得ることができ
る。又記録トラツクが例え曲がつた軌跡となつて
いても、その曲がつた軌跡に忠実にトラツキング
を行うものであるため記録トラツク巾を狭くした
記録再生が可能となりテープ使用効率を高めテー
プカセツトを小型にすることができ、機器全体を
小型化することが可能となる。そして、記録時に
はコイルにバイアス電流を流すことによつて回転
デイスクを一方向に移動させ、回転デイスクをロ
ツク部材に当接させることによつて、回転磁気ヘ
ツドを固定することができるものである。 As described above, according to the present invention, it is possible to improve tracking during self-recording and playback of a magnetic recording and playback device and during compatible playback between devices, without increasing mechanical accuracy, and to obtain the best tracking state. It becomes possible to perform the best recording signal reproduction and obtain the best quality of the reproduced signal. In addition, even if the recording track is curved, tracking is performed faithfully to the curved trajectory, so recording and playback with a narrow recording track width is possible, increasing tape usage efficiency and making tape cassettes smaller. This makes it possible to downsize the entire device. During recording, the rotating magnetic head can be fixed by moving the rotating disk in one direction by passing a bias current through the coil and bringing the rotating disk into contact with the locking member.
第１図は従来のVTRのトラツキング制御系を
示すブロツク図、第２図は従来のトラツキング状
態を示す図、第３図は本発明の一実施例を示すブ
ロツク図、第４図および第５図はそれぞれ本発明
の要部構成を示す断面図である。
１……磁気テープ、１６……回転デイスク、１
７……磁気ヘツド、２０……電気・機械変換素子
（ヘツド位置調整手段）、２３……回転軸、３０…
…トラツク位置検出装置、３５……バイアス回
路、５０……ロツク部材。
FIG. 1 is a block diagram showing a tracking control system of a conventional VTR, FIG. 2 is a diagram showing a conventional tracking state, FIG. 3 is a block diagram showing an embodiment of the present invention, and FIGS. 4 and 5. 2A and 2B are cross-sectional views showing the configuration of essential parts of the present invention, respectively. 1... Magnetic tape, 16... Rotating disk, 1
7...Magnetic head, 20...Electro-mechanical conversion element (head position adjustment means), 23... Rotating shaft, 30...
...Track position detection device, 35...Bias circuit, 50...Lock member.
Claims (1)
気ヘツドを構成し、この回転磁気ヘツドにより磁
気テープ上にそのテープ長手方向に対して傾斜し
た記録軌跡として順次信号を記録再生する回転ヘ
ツド型磁気記録再生装置において、前記回転磁気
ヘツドを弾性体を介して回転軸に連結して前記回
転磁気ヘツドを回転可能にかつ前記回転軸の軸方
向に上下動可能に構成し、前記回転デイスクにコ
イルを取付け、このコイルに近接するヨークと永
久磁石を設けて磁気回路を構成し、前記回転磁気
ヘツドを上又は下方向に移動させたときに当接す
るロツク部材を設け、記録時に前記コイルにバイ
アス電流を流すことによつて前記回転磁気ヘツド
を一方向に移動させて前記ロツク部材に当接して
前記回転磁気ヘツドを所定の位置で固定し、再生
時に前記磁気ヘツドの走査軌跡と記録軌跡の差異
に応じた信号を前記コイルに加えて前記回転磁気
ヘツドを上下動させることを特徴とする回転ヘツ
ド型磁気記録再生装置。1. A rotating head type magnetic recording/reproducing device in which a magnetic head is attached to a rotating disk to form a rotating magnetic head, and the rotating magnetic head sequentially records and reproduces signals on a magnetic tape as a recording locus inclined with respect to the longitudinal direction of the tape. The rotating magnetic head is connected to a rotating shaft via an elastic body so that the rotating magnetic head is rotatable and movable up and down in the axial direction of the rotating shaft, and a coil is attached to the rotating disk. A magnetic circuit is constructed by providing a yoke and a permanent magnet close to the coil, and a locking member is provided that comes into contact when the rotating magnetic head is moved upward or downward, and a bias current is caused to flow through the coil during recording. Therefore, the rotating magnetic head is moved in one direction and brought into contact with the locking member to fix the rotating magnetic head at a predetermined position, and a signal corresponding to the difference between the scanning trajectory and the recording trajectory of the magnetic head is generated during reproduction. A rotating head type magnetic recording/reproducing apparatus characterized in that the rotating magnetic head is moved up and down in addition to the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4700878A JPS54138414A (en) | 1978-04-19 | 1978-04-19 | Rotary head type magnetic recorder-reproducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4700878A JPS54138414A (en) | 1978-04-19 | 1978-04-19 | Rotary head type magnetic recorder-reproducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54138414A JPS54138414A (en) | 1979-10-26 |
| JPS6155174B2 true JPS6155174B2 (en) | 1986-11-26 |
Family
ID=12763131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4700878A Granted JPS54138414A (en) | 1978-04-19 | 1978-04-19 | Rotary head type magnetic recorder-reproducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54138414A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0748249B2 (en) * | 1986-12-16 | 1995-05-24 | 三菱電機株式会社 | VTR video head drive |
| JPH0677293B2 (en) * | 1987-04-22 | 1994-09-28 | 三菱電機株式会社 | Video tape recorder video head drive |
| JP2620084B2 (en) * | 1987-07-02 | 1997-06-11 | 三菱電機株式会社 | VTR video head drive |
| JPH06101108B2 (en) * | 1987-07-24 | 1994-12-12 | 三菱電機株式会社 | Rotating magnetic head unit |
-
1978
- 1978-04-19 JP JP4700878A patent/JPS54138414A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54138414A (en) | 1979-10-26 |
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