JPS62170016A - Rotary head type data reproducing device - Google Patents
Rotary head type data reproducing deviceInfo
- Publication number
- JPS62170016A JPS62170016A JP1145386A JP1145386A JPS62170016A JP S62170016 A JPS62170016 A JP S62170016A JP 1145386 A JP1145386 A JP 1145386A JP 1145386 A JP1145386 A JP 1145386A JP S62170016 A JPS62170016 A JP S62170016A
- Authority
- JP
- Japan
- Prior art keywords
- head
- track
- section
- rotary head
- sections
- 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
Links
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/1808—Driving of both record carrier and head
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
- G11B15/125—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams conditioned by the operating function of the apparatus
-
- 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
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は回転ヘッド形データ再生機に関し、特に８ｍｍ
ＶＴＲと称されている２回転ヘッドＶＴＲで記録したＰ
ＣＭオーディオ信号を再生する再生機に用いて最適なも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotary head type data reproducing machine, and in particular to an 8 mm
P recorded with a two-rotation head VTR called a VTR
It is most suitable for use in a playback device that plays back CM audio signals.
１本の斜めトラックを複数に分割した各セクションを個
別に回転ヘッドで再生するようにし、回転ヘッドをトラ
ック幅方向に送って各セクションを選択し、更にトラッ
キング信号でもって回転ヘッドの回転面の高さをＨＪＩ
て最適な再生走査を行わせるようにしたものである。A single diagonal track is divided into multiple sections, each section is played back individually by a rotating head, the rotating head is sent in the track width direction to select each section, and the height of the rotating surface of the rotating head is adjusted using a tracking signal. Sao HJI
This is so that optimum reproduction scanning can be performed.
８ｍｍＶＴＲと称されている２回転ヘッドＶＴＲで、ド
ラムに対するテープ巻付角を１８０°以上（例えば２１
０°）にして、ビデオ信号（１８０°）と時間圧縮した
ＰＣＭオーディオ信号（３６°）とを時分割記録するも
のが知られている。ビデオ区間ヲ更に３６°ずつの５セ
グメント（セクション）に分けて全部で６チヤンネルの
ＰＣＭオーディオ記録エリアとして利用することもでき
る。In a two-rotation head VTR called an 8mm VTR, the tape wrapping angle around the drum is 180° or more (for example, 21mm VTR).
0°) and time-divisionally records a video signal (180°) and a time-compressed PCM audio signal (36°). The video section can also be further divided into 5 segments (sections) of 36° each and used as a PCM audio recording area for a total of 6 channels.
このようなＶＴＲで記録したＰＣＭ信号のみを再生する
ＰＣＭオーディオ再生機が考えられる。A PCM audio playback device that plays back only PCM signals recorded by such a VTR is conceivable.
１チヤンネル（３６°分）のみ再生するのであれば、テ
ープ巻付角を約１５０°にすると、ドラム径を１０＋ｎ
ｏ＋程度にすることができ、更にドラムをその回転軸方
向にステップ状に高さ調整し得るように構成すれば、６
チヤンネル全部をチャンネルごとに再生することができ
る。If only one channel (36°) is to be played, if the tape winding angle is approximately 150°, the drum diameter will be 10+n.
If the height of the drum can be adjusted in steps in the direction of its rotation axis, the height of the drum can be adjusted to about 6
All channels can be played individually.
回転ヘッドドラムの高さを例えばステップモータ等で調
整する構造にすると、機械的に十分な情度を出すことが
困難であり、正確なトラッキングができない問題がある
。またＰＣＭデータは各チャンネルごとにテープ長手方
向に連続して記録されるので、一本の斜めトラック上で
各チャンネルの位置がテープ長手方向に不揃いになる場
合があり・従って一定ピッチのヘッド高さ調整では正確
なトラッキングができない問題もある。If the height of the rotating head drum is adjusted using, for example, a step motor, it is difficult to achieve sufficient mechanical control, and there is a problem in that accurate tracking cannot be achieved. Also, since PCM data is recorded continuously in the longitudinal direction of the tape for each channel, the position of each channel may be uneven in the longitudinal direction of the tape on a single diagonal track. There is also the problem that accurate tracking cannot be achieved through adjustment.
本発明はこの問題にかんがみ、正確なトラッキングがで
きるようにすることを目的とする。In view of this problem, the present invention aims to enable accurate tracking.
１本の斜めトラックを複数に分割した各セクションごと
にディジタル信号が記録されている磁気テープ２を再生
する回転ヘッド形データ再生機が第１図〜第１Ｏ図に開
示されている。A rotary head type data reproducing machine for reproducing a magnetic tape 2 on which a digital signal is recorded in each section obtained by dividing one diagonal track into a plurality of sections is disclosed in FIGS. 1 to 1O.
回転ヘッド１５の走査軌跡は上記トラックの１つのセク
ションに制限されている。パルスモーク１６のようなヘ
ッド送り手段により、回転ヘッド全体をトラック幅方向
に送って各セクションごとに定置させる。バイモルフ板
１８のような電気−機械変換素子を用いて、回転ヘッド
１５を保持してその回転面の高さをトラッキング信号に
応じて微調する。The scanning trajectory of the rotary head 15 is restricted to one section of the track. A head feeding means such as a pulse smoke 16 feeds the entire rotary head in the track width direction and positions it in each section. An electro-mechanical transducer such as a bimorph plate 18 is used to hold the rotary head 15 and finely adjust the height of its rotating surface in accordance with a tracking signal.
（作用〕
走査軌跡をトラックの１つのセクションに制限すること
により、回転ヘッド径は著しく小さくなる。所望のセク
ション（エリア）を選択するためのヘッド送りとトラッ
キングサーボにより最適再生出力が得られる。(Operation) By restricting the scanning locus to one section of the track, the rotary head diameter is significantly reduced. Optimal playback output is obtained by head feeding and tracking servo to select a desired section (area).
第８図は８ｍｍＶＴＲと称されている周知の２回転ヘッ
ドＶＴＲの回転ヘッド部分の路線図で、１８０°間隔の
一対の回転ヘッドＩＡ、ＩＢが設けられ、磁気テープ２
はドラム３に２１０°以上にわたって巻回されている。FIG. 8 is a route diagram of the rotary head portion of a well-known two-rotation head VTR called 8mm VTR.
is wound around the drum 3 over 210 degrees.
巻四角の１８０’区間がビデオエリアで、３６°の区間
がＰＣＭオーディオエリアである。The 180' section of the winding square is the video area, and the 36° section is the PCM audio area.
第９図のトラック図に示すように、ビデオエリアを５つ
のセグメントに分けて、各部をＰＣＭエリアとすれば、
全体で６チヤンネル分のＰＣＭ記録ができる。As shown in the track diagram in Figure 9, if the video area is divided into five segments and each part is designated as a PCM area,
A total of 6 channels of PCM recording can be performed.
第９図の矢印で示すように、ヘッドの走査軌跡１−［を
１つのＰＣＭエリアに限定し、且つヘッド高さを各チャ
ンネルのエリアごとに換える（シフトする）ようにすれ
ば、ドラム径を小さくした非常にコンパクトな再生専用
機を構成できる。従って第１０図に示すように、径が例
えば１０ｍｍで、テープ巻付角を１５０°程度にした回
転ヘッドドラム５を用い、テープカ七ソト６の前面開口
スペース７内にヘッドドラム５を挿入するような構成に
すると、カセット大のＰＣＭオーディオ再生機を構成で
きる。As shown by the arrow in Figure 9, if the head scanning trajectory 1-[ is limited to one PCM area and the head height is changed (shifted) for each channel area, the drum diameter can be reduced. A very compact playback-only machine can be constructed. Therefore, as shown in FIG. 10, a rotary head drum 5 having a diameter of, for example, 10 mm and a tape winding angle of about 150 degrees is used, and the head drum 5 is inserted into the front opening space 7 of the tape case 6. With this configuration, a cassette-sized PCM audio player can be constructed.
第１図は本実施例のＰＣＭオーディオ再生機の回転ヘッ
ド部の斜視図で、上ドラムｌＯと下ドラムＩＩを可動ブ
【コ・ツク１２に固定し、ガイドロッド１３とスクリュ
ーロッド１４とでブロック１２を回転ヘッド１５の回転
軸Ｓの方向に移動可能にしである。スクリューロッド１
４は例えばパルスモータ１６によって回転され、これに
よってヘト１５の高さが、第９図のトラックの各ＰＣＭ
エリアに合致するように調整される。FIG. 1 is a perspective view of the rotating head of the PCM audio playback device of this embodiment, in which the upper drum IO and lower drum II are fixed to a movable block 12 and blocked with a guide rod 13 and a screw rod 14. 12 is movable in the direction of the rotation axis S of the rotary head 15. screw rod 1
4 is rotated by, for example, a pulse motor 16, so that the height of the head 15 is adjusted to the height of each PCM of the track shown in FIG.
Adjusted to fit the area.
回転ヘッド川５は上下トラム１０．１１の隙間において
ヘッドモータ１７によって回転される。The rotating head 5 is rotated by a head motor 17 in the gap between the upper and lower trams 10.11.
ヘノｔ’高さを微調するために、第２Ａ図、第２Ｂ図に
示すように、ヘッド１５は電気−機械変換素子であるバ
イモルフ板１８を介して回転板１９に保持されている。In order to finely adjust the height t', the head 15 is held on a rotary plate 19 via a bimorph plate 18, which is an electro-mechanical conversion element, as shown in FIGS. 2A and 2B.
回転ヘッド１５は、第３図に示すように、互いに逆アジ
マスのＡヘッド１５Ａ、Ｂヘッド１５Ｂを一体化したダ
ブルアジマスヘッドである。As shown in FIG. 3, the rotary head 15 is a double azimuth head in which an A head 15A and a B head 15B, which are opposite in azimuth to each other, are integrated.
第４Ａ図、第４Ｂ図に示すように、テープガ・イド２Ｏ
Ａ、２０Ｂにて一定高さに保持されて走行する磁気テー
プ２に対して、上下ドラム１０．１１が軸方向にシフト
され、ヘッド走査軌跡が第１チヤンネルから第６チヤン
ネルの所望の各ＰＣＭエリアに設定される。As shown in Figures 4A and 4B, the tape guide 2O
The upper and lower drums 10 and 11 are shifted in the axial direction with respect to the magnetic tape 2 held at a constant height and running at points A and 20B, and the head scanning locus is moved to each desired PCM area from the first channel to the sixth channel. is set to
第５図は本実施例のＰＣＭオーディオ再生機の要部ブロ
ック図で、第１チヤンネル〜第６チヤンネルのチャンネ
ル選択信号がドライブ回路２１に供給されて、その出力
でパルスモータ１６が制御され、可動ブロック１２が移
動される。これによってヘッド１５八、１５Ｂが所望の
高さのチャンネルにセントされる。FIG. 5 is a block diagram of the main parts of the PCM audio playback device of this embodiment. Channel selection signals for the first to sixth channels are supplied to the drive circuit 21, and the pulse motor 16 is controlled by its output, making it movable. Block 12 is moved. This causes the heads 158, 15B to be centered in the channel at the desired height.
ヘッド１５Ａ、１５Ｂの再生出力は切換スイ、７チ２２
で交互選択されてから、再生アンプ２３、デモシュレー
タ２４を経てＰＣＭ復調回路２５に送られ、オーディオ
出力として導出される。バイモルフ板１８には、Ｉ Ｋ
Ｈｚ程度のウオブリング（励振）信号が発振器２６か
ら加算器２７を経て供給される。これによって再生ＲＦ
信号（ＦＭ波）のエンベロープがヘッドとトラックとの
ずれに応じてＡＭ変調される。The playback output of heads 15A and 15B is set using the switch switch, 7chi 22.
After being alternately selected, the signals are sent to a PCM demodulation circuit 25 via a reproduction amplifier 23 and a demodulator 24, and are derived as an audio output. The bimorph plate 18 has an IK
A wobbling (excitation) signal of approximately Hz is supplied from an oscillator 26 via an adder 27. This allows the reproduction of RF
The envelope of the signal (FM wave) is AM modulated according to the deviation between the head and the track.
そこで再生アンプ２３の出力のＲＦエンベロープをエン
ベロープディテクタ２８で検出し、その検出出力とウオ
ブリング発振器２６の出力の原発振信号とを乗算器２９
で掛は合わして同期検波を行えば、トラッキングエラー
の景及び方向（トラック幅方向の右、左）の情報が得ら
れる。乗算出力のトラッキングエラー信号は、フィルタ
３０にてウオブリング成分が除去されてからドライブ回
路３１、加算器２７を経てバイモルフ板１８に帰還され
る。このフィードバックループによりトラッキングサー
ボが行われ、パルスモータ１６によって粗く設定したヘ
ッド高さに対して最適出力が得られるように微調整が行
われる。Therefore, the RF envelope of the output of the reproduction amplifier 23 is detected by the envelope detector 28, and the detected output and the original oscillation signal of the output of the wobbling oscillator 26 are combined into a multiplier 29.
By combining the projections and performing synchronous detection, information on the appearance and direction of the tracking error (right and left in the track width direction) can be obtained. The tracking error signal of the multiplication output has its wobbling component removed by a filter 30, and then is fed back to the bimorph plate 18 via a drive circuit 31 and an adder 27. Tracking servo is performed by this feedback loop, and fine adjustment is performed to obtain the optimum output for the head height roughly set by the pulse motor 16.
なおテープ２上の隣接する逆アジマスの記録トラックを
第３図のダブルアジマスヘッドＩ５で交互に走査するた
めに、Ａフィールド／Ｂフィールドで交互に高レベル／
低レベルになるシフトパルスＳＰを加算器２７からバイ
モルフ板１８に与える。Note that in order to alternately scan adjacent reverse azimuth recording tracks on the tape 2 with the double azimuth head I5 shown in FIG.
A shift pulse SP having a low level is applied from the adder 27 to the bimorph plate 18.
なお第６図のように逆アジマスヘッド１５Ａ、１５Ｂを
トラック間隔で二段に重ね合わせた一体化ヘッドであれ
ば、フィールド交互のヘッドシフトは不要である。また
第７図に示すように、各へラド１５Ａ、１５Ｂにつきバ
イモルフ板１８Ａ、１８Ｂを設けて、個別にヘッド高さ
の調整を行ってもよい。Incidentally, if the head is an integrated head in which reverse azimuth heads 15A and 15B are overlapped in two stages at a track interval as shown in FIG. 6, alternating field head shifting is not necessary. Alternatively, as shown in FIG. 7, bimorph plates 18A and 18B may be provided for each helad 15A and 15B to individually adjust the head height.
本発明は上述のように構成したので、回転ヘッドを記録
機の１１Ｂ程度に小さくすることができ、超小形のデー
タ再生機が得られる。またヘソＩＳ送り機構の位置決め
精度が十分とれなくても、トラッキングサーボ系がこれ
を補って最適トラッキングが行われる。従ってヘッド送
り機構が簡略になり、低コストに製造できる。なおヘッ
ドドラムの径を記録機と同程度にし、テープ巻付角のみ
を１チャンネル分にすれば、テープローディング機構が
簡単な再生機が得られる。Since the present invention is configured as described above, the rotary head can be made as small as about 11B of the recorder, and an ultra-compact data reproducing machine can be obtained. Furthermore, even if the positioning accuracy of the navel IS feeding mechanism is not sufficient, the tracking servo system compensates for this and optimal tracking is performed. Therefore, the head feeding mechanism is simplified and can be manufactured at low cost. Note that by making the diameter of the head drum the same as that of the recording machine and making only the tape winding angle for one channel, a playback machine with a simple tape loading mechanism can be obtained.
第１図〜第１０図は本発明の実施例を示し、第１図はＰ
ＣＭオーディオ再生機の回転ヘッド部の概略を示す斜視
図、第２八図は回転ヘッドの平面図、第２Ｂ図は側面図
、第３図はヘッドの正面図、第４Ａ図及び第４Ｂ図は回
転ヘッドドラムのチ、ヤンネルごとの位置決め動作を示
す回転ヘッド部の正面図、第５図はＰＣＭ再生及びヘッ
ド位置制御系のブロック図、第６図は回転・＼ラドの変
形例を示す正面図、第７図は回転ヘッド支持部の変形例
を示す平面図、第８図は周知のビデオ十ＰＣＭオーディ
オ用ＶＴＲの回転ヘッド部の略下面図、第９図は多段Ｐ
ＣＭエリアに分割したトラックの略線図、第９図はＰＣ
Ｍ再生専用機の回転ヘッド及びテープカセットを示す略
線図である。
なお図面に用いた符号において、
１０−・・−−−一−−−−・・・・−上ドラム１１−
−・・・−−−−−−−−一一一下ドラム１２−−−−
−−−−−−・−・−可動プロ・７り１３−・−・−一
−−−−・−−一−−−ガイドブロック１４・−・−・
−−一−−−−・・−スクリューロッド１５・・−・・
・・・−−−−−・−・一回転ヘッド１６・・−−−−
−−−・−・−・・・・−パルスモータ１７−・−・−
・・・・・−ヘント゛モータ１８−・−・−・・・・−
・・・−バイモルフ板１９・・−−−−−・−・・・−
・−・・−回転板である。1 to 10 show embodiments of the present invention, and FIG.
FIG. 28 is a plan view of the rotating head; FIG. 2B is a side view; FIG. 3 is a front view of the head; FIGS. 4A and 4B are A front view of the rotary head section showing the positioning operation for each channel and yang of the rotary head drum, Fig. 5 is a block diagram of the PCM reproduction and head position control system, and Fig. 6 is a front view showing a modified example of rotation/\rad. , FIG. 7 is a plan view showing a modification of the rotary head support section, FIG. 8 is a schematic bottom view of the rotary head section of a well-known video/PCM audio VTR, and FIG. 9 is a multi-stage PCM
A schematic diagram of a track divided into CM areas, Figure 9 is a PC
FIG. 2 is a schematic diagram showing a rotary head and a tape cassette of an M reproduction-only machine. In addition, in the symbols used in the drawings, 10-...--1-----...-Upper drum 11-
−・・−−−−−−−−111 lower drum 12−−−−
---
---1---- Screw rod 15...
...--------One rotation head 16...----
−−−・−・−・・・−Pulse motor 17−・−・−
・・・・・・−Hent motor 18−・−・−・・・−
・・・−Bimorph board 19・・−−−−・−・−
・−・・− It is a rotating plate.
Claims (1)
にディジタル信号が記録されている磁気テープを再生す
る回転ヘッド形データ再生機であって、 走査軌跡が上記トラックの１つのセクションに制限され
ている回転ヘッドと、回転ヘッド全体をトラック幅方向
に送って各セクションごとに定置させるヘッド送り手段
と、回転ヘッドを保持してその回転面の高さをトラッキ
ング信号に応じて微調する電気−機械変換手段とを具備
する回転ヘッド形データ再生機。[Claims] A rotary head data reproducing machine for reproducing a magnetic tape in which a digital signal is recorded in each section obtained by dividing one diagonal track into a plurality of sections, the scanning trajectory being one of the tracks. A rotating head that is limited to sections, a head feeding means that sends the entire rotating head in the track width direction and places it in each section, and a rotating head that holds the rotating head and finely adjusts the height of its rotating surface according to tracking signals. A rotary head type data reproducing machine comprising electro-mechanical conversion means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1145386A JPS62170016A (en) | 1986-01-22 | 1986-01-22 | Rotary head type data reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1145386A JPS62170016A (en) | 1986-01-22 | 1986-01-22 | Rotary head type data reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62170016A true JPS62170016A (en) | 1987-07-27 |
Family
ID=11778514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1145386A Pending JPS62170016A (en) | 1986-01-22 | 1986-01-22 | Rotary head type data reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62170016A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017507760A (en) * | 2014-03-18 | 2017-03-23 | クリストフ、フォン、マンダッハＣｈｒｉｓｔｏｐｈ Ｖｏｎ Ｍａｎｄａｃｈ | Orthodontic bracket kit |
-
1986
- 1986-01-22 JP JP1145386A patent/JPS62170016A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017507760A (en) * | 2014-03-18 | 2017-03-23 | クリストフ、フォン、マンダッハＣｈｒｉｓｔｏｐｈ Ｖｏｎ Ｍａｎｄａｃｈ | Orthodontic bracket kit |
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