JPS60107724A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS60107724A
JPS60107724A JP21648883A JP21648883A JPS60107724A JP S60107724 A JPS60107724 A JP S60107724A JP 21648883 A JP21648883 A JP 21648883A JP 21648883 A JP21648883 A JP 21648883A JP S60107724 A JPS60107724 A JP S60107724A
Authority
JP
Japan
Prior art keywords
head
magnetic
cores
reproducing
recording
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
JP21648883A
Other languages
Japanese (ja)
Inventor
Minoru Hama
濱　実
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP21648883A priority Critical patent/JPS60107724A/en
Publication of JPS60107724A publication Critical patent/JPS60107724A/en
Pending legal-status Critical Current

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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

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

PURPOSE:To raise an accuracy of a tracking control by supporting a magnetic head by two parallel plate springs, driving the magnetic head in the width direction of a magnetic tape basing on a signal reproduced from at least one core of plural cores of the magnetic head, and executing the tracking control. CONSTITUTION:Tracking control cores 17a, 17b of a reproducing head 17 are placed so as to detect half of a track recorded by cores 14a, 14b of a recording head 14, and a tape varying direction is detected by magnitude of an output reproduced by these cores 17a, 17b. The reproducing head 17 is driven in the direction as indicated with an arrow B or in the direction of D by a driving force [2bt.v/3.g1.(l): where g1, (l), (b), (t) and (v) denote a piezoelectric constant, a length, a depth, a thickness and an impressed voltage, respectively] of a piezoelectric element. In this regard, the reproducing head 17 is supported by two parallel plate springs 18, therefore, it can be considered to move in parallel within a moving range of the reproducing head 17.

Description

【発明の詳細な説明】 ０）　産業上の利用分野 本発明は磁気記録再生装置に関するものでるハ％に磁気
テープに記録された信号トラックを正確に追従し得るよ
うに設けられたオートトラッキング装置を備えた磁気記
録再生装置に関するものでるる。DETAILED DESCRIPTION OF THE INVENTION 0) Industrial Field of Application The present invention relates to a magnetic recording and reproducing device. This article relates to a magnetic recording/reproducing device equipped with a magnetic recording/reproducing device.

（ロ）従来技術 ］ンパクトカセット方式のテープレコーダは、現在最も
広く用ｉられて噴るオーディオ信号の磁気配録再生装置
でめるが、そのダイナミックレンジは、現在得ることの
出来る最高性能のテープを適用してもＩＫＨｚで高々７
ｇｄＢ程度でロシ、録音されるばニーシックソースと較
べて極めて狭いものである〇 斯る点に鑞み、オーディオ信号を標本化、量子化してデ
ジタル信号に変換し、斯るデジタル信号を磁気テープに
記録することにより磁気記録再生に伴う信号の劣化を避
けるようにした所謂ＰＣＭ（パルス符号変調）方式の磁
気記録再生方法及び装置が最近提案されて−る。(B) Prior art] The compact cassette type tape recorder is currently the most widely used magnetic recording and reproducing device for audio signals, and its dynamic range is the highest performance tape recorder currently available. Even if you apply
When recorded with a radio frequency of about gdB, it is extremely narrow compared to a nisic source. Taking advantage of this point, the audio signal is sampled, quantized, converted to a digital signal, and the digital signal is recorded on a magnetic tape. Recently, a so-called PCM (Pulse Code Modulation) magnetic recording/reproducing method and apparatus has been proposed, which avoids signal deterioration accompanying magnetic recording/reproducing by recording on the magnetic field.

係、オーディオ信号等のアナログ信号をデジタル信号化
した場合、その情装置は従来の磁気記録再生装置の記録
系では到底記録できない程度に増大するので、一般に磁
気テープｖｃＰＣＭ信号を高密度記録するにはデジタル
信号を複数コアのマルチチャンネル固定ヘッドを用いて
並列的に分散する方法が用いられている。Regarding this, when converting an analog signal such as an audio signal into a digital signal, the size of the information device increases to such an extent that it cannot be recorded using the recording system of a conventional magnetic recording/reproducing device. A method is used in which digital signals are distributed in parallel using a multi-core multi-channel fixed head.

とζろで、斯るマルチチャンネル固定ヘッド（１＋ｌＪ
えば、薄膜磁気ヘッド）のトラック巾は５０〜９０μｍ
でるり、従来のアナログ用磁気ヘッドのトラック巾と比
較して約１／１０と非常に狭い為、斯るマルチチャンネ
ル磁気ヘッドを用いてＰ　ＣＭ信号を記録再生するには
トラッキング制御が重要なものとなる。and ζ, such a multi-channel fixed head (1+lJ
For example, the track width of a thin film magnetic head is 50 to 90 μm.
Since the track width is very narrow, approximately 1/10 of the track width of conventional analog magnetic heads, tracking control is important when recording and reproducing PCM signals using such multi-channel magnetic heads. becomes.

然し乍ら、従来の磁気記録再生装置におけるトラッキン
グ制御は、調整ビス・バネ等による磁気ヘッドの姿勢調
整でのみ行っている為、すくないものでも２０〜６０μ
ｍテープ巾方向への変動を生じていた。However, tracking control in conventional magnetic recording and reproducing devices is performed only by adjusting the attitude of the magnetic head using adjustment screws, springs, etc.
m There was a variation in the tape width direction.

これは、トラックの１／２〜１／３程度にもなり記録再
生に支障をきたすものでめった。This amounted to about 1/2 to 1/3 of the track and was a problem in recording and reproducing.

（ハ）発明の目的 本発明は上記の点［鑑み、トラッキング制御の精度を向
上させ、良好な記録再生動作を達成し得る磁気記録再生
装置を提供することを目的とする０ に）発明の構成 上記目的を達成する為に、複数コアを有し、すくなくと
も磁気テープに記録された信号を再生し得る磁気ヘッド
と、この磁気ヘッドを支持する二枚の平行板バネと、磁
気ヘッドを磁気テープの中方向へ変動する駆動手段とよ
ルなり、磁気ヘッドの複数のコアのうちすくなくとも一
つのコアよシ再生された信号に基づき駆動手段にて磁気
ヘッドを磁気テープの巾方向へ駆動し、以ってトラッキ
ング制御を行うように構成した。(c) Purpose of the Invention In view of the above points, an object of the present invention is to provide a magnetic recording and reproducing device that can improve the accuracy of tracking control and achieve good recording and reproducing operations. In order to achieve the above object, we have developed a magnetic head that has multiple cores and can reproduce at least signals recorded on a magnetic tape, two parallel plate springs that support this magnetic head, and a magnetic head that supports the magnetic tape. The drive means drives the magnetic head in the width direction of the magnetic tape based on the signal reproduced by at least one of the plurality of cores of the magnetic head. The system was configured to perform tracking control using

（ホ）実　施　例 第１図〜第６図は本発明の一実施例を示す図である。(e) Implementation example 1 to 6 are diagrams showing one embodiment of the present invention.

図において、（１）はカセットハーフ、（２ｊｆ３Ｊは
リールハブ、［４３（５Ｊはリール軸、ｆ６１　Ｆ７〕
はキャプスタン、（８）（９）はピンチローラ、（旧は
磁気テープ、ＬＤはヘッド基板で、記録若しくは再生時
に磁気テープ（１（１方向へ移動される。（１２１はヘ
ッド基板Ｕに取付けられた消去ヘッド、（１３は記録ヘ
ッドＩが取付けられる基板、１１５１はヘッド基板Ｕυ
と基板（１３間に配置されたコイルバネ、霞はヘッド基
板Ｕυと基板ｔ１３１に螺着される調整螺子で、締付は
或は緩めることによ少記録ヘッド（１４１の磁気テープ
叩に対する高さ及びアジマスを調整する。σＤは再生ヘ
ッド、１１８は一端にて再生ヘッドαηを支持する板バ
ネで、他端が基板（ｔｌに固定された固定部材■に固定
される。ｃ２１）はヘッド基板住υと基板（１９間に配
置されたコイルバネ、四はヘッド基板Ｕυ及び基板１１
’ｌと螺着される調整螺子で、締付は戒は緩めることに
よル再生ヘッドｔｔｉの磁気テープ１１１　Ｋ対する高
さ及びアジマスを調整する。Ｑ３１は再生ヘッドσηに
取付けられた略り字状の取付部材で、シャフト霞を介し
てボイスコイル四に連結されておシ、ボイスコイル四の
動きに応じて再生ヘッド（ｌηを変位させる。ｃ＋＋５
１はシャフト＃２４１の軸受同を有するヨーク、（至）
はセンターボール、困は永久磁石である。In the figure, (1) is the cassette half, (2jf3J is the reel hub, [43 (5J is the reel shaft, f61 F7]
is a capstan, (8) and (9) are pinch rollers (formerly known as magnetic tape, and LD is a head board; the magnetic tape (1) is moved in one direction during recording or playback. (121 is attached to the head board U). (13 is the substrate on which the recording head I is attached, 1151 is the head substrate Uυ
The coil spring arranged between the head board Uυ and the board T131 is an adjustment screw that can be tightened or loosened to adjust the height and height of the recording head (141) for hitting the magnetic tape. Adjust the azimuth. σD is the playback head, 118 is a leaf spring that supports the playback head αη at one end, and the other end is fixed to the substrate (fixed member ① fixed to tl. c21) is the head substrate housing υ and the board (coil spring placed between 19, 4 is the head board Uυ and the board 11)
The height and azimuth of the reproducing head tti relative to the magnetic tape 111K can be adjusted by tightening or loosening the adjustment screw screwed into the head. Q31 is an abbreviated mounting member attached to the playback head ση, which is connected to the voice coil 4 through the shaft shaft and displaces the playback head (lη) according to the movement of the voice coil 4.c++5
1 is a yoke with a bearing of shaft #241, (to)
is the center ball, and trouble is the permanent magnet.

ところで、記録ヘッドＩ及び再生ヘッド（１７１のコア
は第５図に示す如き形状となっている。Incidentally, the cores of the recording head I and the reproducing head (171) have shapes as shown in FIG.

即ち、（１４ａ）（１４ｂ）及び（１７＆）（１７ｂ）
はトラッキング制御用コア、（１４ｅ）〜（１４ｇ）及
び（１７（り〜（１７ｇ）は信号用コアでるる。That is, (14a) (14b) and (17&) (17b)
(14e) to (14g) and (17(ri) to (17g) are signal cores.

次に、斯る装置におけるトラッキング制御動作について
説明する。Next, a tracking control operation in such an apparatus will be explained.

先ず、調整螺子ＵＳ及び四を締付は或は緩めることによ
り記録ヘッドＩ及び再生ヘッド住ηの磁気テープ＋１１
に対する高さ及びアジマスを調整する。First, by tightening or loosening the adjusting screws US and 4, the magnetic tape +11 of the recording head I and the reproducing head
Adjust the height and azimuth relative to the

斯様に初期調整をなされた後、記録ヘッド１１４ＪＶＣ
よるＰＣＭ信号の記録若しくは再生ヘッド面によるＰＣ
Ｍ信号の再生がなされる。After making the initial adjustment in this way, the recording head 114JVC
PCM signal recording or playback head surface
The M signal is reproduced.

ところで、前述した如く斯る初期調整だけでは、記録時
と再生時においてテープ送り系等の関係によシ２０〜６
０μｍのトラックのずれ（磁気テープの巾方向変動）を
生じる供れがろる。By the way, as mentioned above, with only such initial adjustment, there will be problems with the tape feed system etc. during recording and playback20-6.
This will result in a track deviation of 0 μm (variation in the width direction of the magnetic tape).

従って、本発明では再生ヘッド（１７）のトラツキング
制御用コア（１７”）（１７ｂ）を記録ヘッド圓のコア
（１４ａ）（１４ｂ）［てｉｅ録サすタトラックの半分
を検出するよりに配置し、このコア（１７ａ）（１７ｂ
）にて再生される出方の大小によシテープ変動方向を検
知するようにしている。Therefore, in the present invention, the tracking control cores (17") (17b) of the playback head (17) are arranged so that the cores (14a) (14b) of the recording head circle can detect half of the recording track. And this core (17a) (17b
), the direction of tape fluctuation is detected based on the magnitude of the playback.

即ち、再生時、第６図においてテープ１１１が矢印Ａ方
向へ変動したとすると、再生ヘッド１ηのコア（１７ａ
　）　ｖＣよる再生出力がコア（１７ｂ）による再生出
力よシ大となる為、コア（１７ＪＬ）（１７ｂ）からの
再生信号を二人力とする差動増幅器図が能動状態となシ
、斯る差動増幅器０１の出力が基準電圧（Ｖｌ）（尚、
再生ヘッドの機械的な初期設定が確実であればｖｌは零
でもよい）ＶＣ加算されてボイスコイル固に印加され、
再生ヘッドσηをコア（１７ａ　）　（１７ｂ　）ｖｃ
ヨｂＭ生４Ｈ号ＣＤ差（即ち、差動増幅器図の出方）が
零となるよりに駆動する。即ち、再生ヘッドａＤを第５
図矢印Ｂ方向へ駆動する。That is, when the tape 111 moves in the direction of arrow A in FIG. 6 during playback, the core (17a
) Since the reproduced output by vC is larger than the reproduced output by the core (17b), the differential amplifier diagram that uses the reproduced signals from the core (17JL) (17b) as power is not in an active state. The output of the dynamic amplifier 01 is the reference voltage (Vl) (in addition,
(vl may be zero if the mechanical initial settings of the playback head are reliable) VC is added and applied to the voice coil,
Playback head ση to core (17a) (17b)vc
Drive until the Yo bM raw 4H CD difference (that is, the appearance of the differential amplifier diagram) becomes zero. That is, the playback head aD is
Drive in the direction of arrow B in the figure.

又、テープＩＩ（ｌが矢印Ｃ方向へ変動した場合には、
コア（１７ｂ）による再生出力がコア（１７ａ）、によ
る再生出力よシ犬となる為、コア（１７１（１７ｂ）か
らの再生信号を二人力とする差動増幅器ｃ１１Ｊが能動
状態となシ、斯る差動増幅器（１）の出力が基準電圧（
ｖｌ）に加算されてボイスコイル（ハ）に印加され、再
生ヘッドａηをコア（１７ａ）（１７ｂ）による再生信
号の差が零となるように駆動する。Also, if tape II (l changes in the direction of arrow C,
Since the reproduced output from the core (17b) is different from the reproduced output from the core (17a), the differential amplifier c11J that uses the reproduced signal from the core (171 (17b)) is not in an active state. The output of the differential amplifier (1) is the reference voltage (
vl) and is applied to the voice coil (c), driving the playback head aη so that the difference between the playback signals caused by the cores (17a) and (17b) becomes zero.

即ち、再生ヘッドαηを第５図矢印り方向へ駆動する。That is, the reproducing head αη is driven in the direction of the arrow in FIG.

第７図〜第９図は他の実施例を示す図で、再生ヘッド駆
動手段として圧電素子（バイモルフ振動子）Ｃ（ｍｌを
用いている。斯る装置によるトラッキング制御は、差動
増幅器（７）の出力電圧を圧電素子Ｃ１１）ｉｃ印加す
ることによシ達成される。7 to 9 are diagrams showing other embodiments, in which a piezoelectric element (bimorph vibrator) C (ml) is used as the reproducing head driving means. Tracking control by such a device is performed using a differential amplifier (7 ) is achieved by applying the output voltage of the piezoelectric element C11)ic.

即ち、再生ヘッド面は圧電素子の駆動力（２ｂｔ−ｖｌ
６・ｇｌ・ｌ：但し、　ｇｌは圧電定数、ｌは長さ、ｂ
は巾、ｔは厚み、Ｖは印加電圧でるる）にて矢印Ｂ方向
基しくはＤ方向へ駆動される。In other words, the playback head surface receives the driving force (2bt-vl) of the piezoelectric element.
6・gl・l: However, gl is the piezoelectric constant, l is the length, and b
is the width, t is the thickness, and V is the applied voltage), and is driven in the direction of arrow B or in the direction of arrow D.

尚、再生ヘッド面は二枚の平行板バネα♂にて支持され
て−る為、再生ヘッドαでの移動範囲内では平行移動す
るものと見做すことが出来る。Incidentally, since the reproducing head surface is supported by two parallel plate springs α♂, it can be regarded as moving in parallel within the movement range of the reproducing head α.

第１０図嬬す−ボ系の他の例を示すもので、コア（１７
ａ）（尚、コア（１７ｍ）は記録トラックの半分を検出
するように配置されてｉる。）と基準電圧との誤差出力
を駆動手段に印加するものでロシ、誤差出力の正負によ
シ変動方向を検知する０ （ホ）発明の効果 本発明に依れば、トラッキング制御の精度を向上させる
ことが出来、良好な再生特性を得ることが出来る。又、
磁気ヘッドは二枚の平行板バネにて支持されている為、
ヘッドの移動範囲内では平行移動するものと見做すこと
が出来、テープに対するめお９角の変動を生じることが
なく、斯る点からも良好な再生特性を得ることが出来る
。Figure 10 shows another example of the core (17
a) (Note that the core (17m) is arranged so as to detect half of the recording track) and the reference voltage is applied to the driving means, and the difference is determined by the positive or negative sign of the error output. (e) Effects of the Invention According to the present invention, the accuracy of tracking control can be improved and good reproduction characteristics can be obtained. or,
Since the magnetic head is supported by two parallel leaf springs,
Within the movement range of the head, it can be regarded as a parallel movement, and no 9-angle fluctuations occur with respect to the tape, and from this point of view as well, good reproduction characteristics can be obtained.

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

図はいずれも本発明を示すもので、第１図はカセットと
ヘッド基板との関係を示す図、第２図はヘッド基板部を
示す平面図、第３図はその正面断面図、第４図はその側
面断面図、第５図はトラッキングサーボ系を示すブロッ
ク図、第６図は磁気ヘッドのコア部分を示す拡大図、第
７図、第８図、第９図は他の実施例を示す平面図・正面
図及び側面図、第１０図は他のサーボ系を示す図でめる
。 Ｉ・・・記録ヘッド、■・・・再生ヘッド、ｕト・板バ
ネ、苧−・・ボイスコイル、　（（ｉ）・・・圧電素子
。 第７−The drawings all illustrate the present invention: Fig. 1 is a diagram showing the relationship between the cassette and the head substrate, Fig. 2 is a plan view showing the head substrate part, Fig. 3 is a front sectional view thereof, and Fig. 4. 5 is a block diagram showing the tracking servo system, FIG. 6 is an enlarged view showing the core portion of the magnetic head, and FIGS. 7, 8, and 9 show other embodiments. A plan view, a front view, a side view, and FIG. 10 are diagrams showing another servo system. I...recording head, ■...playback head, uto/plate spring, 苯...voice coil, ((i)...piezoelectric element. 7th-

Claims (3)

【特許請求の範囲】[Claims] （１）　複数コアを有し、すくなくとも磁気テープに記
録された信号を再生し得る磁気ヘッドと、この磁気ヘッ
ドを支持する二枚の平行板バネと、前記磁気ヘッドを前
記磁気テープの巾方向へ駆動する駆動手段とよりなり、
前記磁気ヘッドの複数のコアのうち少くなくとも一つの
コアよシ再生された信号に基づき前記駆動手段にて前記
磁気ヘッドを前記磁気テープの巾方向へ駆動し、以って
トラッキング制御を行うようにしたことを特徴とする磁
気記録再生装置。(1) A magnetic head having a plurality of cores and capable of reproducing at least signals recorded on a magnetic tape, two parallel leaf springs supporting this magnetic head, and moving the magnetic head in the width direction of the magnetic tape. It becomes a driving means to drive,
The driving means drives the magnetic head in the width direction of the magnetic tape based on a signal reproduced by at least one of the plurality of cores of the magnetic head, thereby performing tracking control. A magnetic recording/reproducing device characterized by: （２）駆動手段がボイスコイル等よシなる動電型機構で
るる特許請求の範囲第（１）項記載の磁気記録再生装置
。(2) The magnetic recording and reproducing apparatus according to claim (1), wherein the driving means is an electrodynamic mechanism such as a voice coil. （３）駆動手段が圧電素子である特許請求の範囲第（１
）項記載の磁気記録再生装置。(3) Claim No. 1 in which the driving means is a piezoelectric element
) The magnetic recording and reproducing device described in item 2.
JP21648883A 1983-11-16 1983-11-16 Magnetic recording and reproducing device Pending JPS60107724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21648883A JPS60107724A (en) 1983-11-16 1983-11-16 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21648883A JPS60107724A (en) 1983-11-16 1983-11-16 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS60107724A true JPS60107724A (en) 1985-06-13

Family

ID=16689213

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21648883A Pending JPS60107724A (en) 1983-11-16 1983-11-16 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS60107724A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5196969A (en) * 1989-03-31 1993-03-23 Sharp Kabushiki Kaisha Head positioning system for serpentine magnetic recording/reproducing system
US5257148A (en) * 1989-05-30 1993-10-26 Tandberg Data As Method and apparatus for positioning a magnetic head in a magnetic layer memory system using tracking by reading a spaced pair of corresponding subtracks
US5262908A (en) * 1990-02-20 1993-11-16 Sharp Kabushiki Kaisha Tracking control device for magnetic recording/reproducing apparatus
US5285331A (en) * 1989-02-23 1994-02-08 Wangtek Incorporated System for aligning a read head gap over a track of magnetic data

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285331A (en) * 1989-02-23 1994-02-08 Wangtek Incorporated System for aligning a read head gap over a track of magnetic data
US5196969A (en) * 1989-03-31 1993-03-23 Sharp Kabushiki Kaisha Head positioning system for serpentine magnetic recording/reproducing system
US5257148A (en) * 1989-05-30 1993-10-26 Tandberg Data As Method and apparatus for positioning a magnetic head in a magnetic layer memory system using tracking by reading a spaced pair of corresponding subtracks
US5262908A (en) * 1990-02-20 1993-11-16 Sharp Kabushiki Kaisha Tracking control device for magnetic recording/reproducing apparatus

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