JPS63106913A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS63106913A
JPS63106913A JP25199386A JP25199386A JPS63106913A JP S63106913 A JPS63106913 A JP S63106913A JP 25199386 A JP25199386 A JP 25199386A JP 25199386 A JP25199386 A JP 25199386A JP S63106913 A JPS63106913 A JP S63106913A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic head
magnetic disk
recording
disk
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
JP25199386A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Adachi
安達　和芳
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP25199386A priority Critical patent/JPS63106913A/en
Publication of JPS63106913A publication Critical patent/JPS63106913A/en
Pending legal-status Critical Current

Links

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
    • 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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • G11B5/016—Recording on, or reproducing or erasing from, magnetic disks using magnetic foils
    • 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
    • G11B5/488—Disposition of heads
    • G11B5/4886—Disposition of heads relative to rotating disc

Landscapes

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

Abstract

PURPOSE:To average the recording and reproducing characteristics of a first magnetic head and a second magnetic head by positioning the second magnetic head in the center side of a magnetic disk, against the first magnetic head. CONSTITUTION:The second magnetic head 2 having a fixed height against the disk surface which is brought into contact very stably with a flexible magnetic disk is positioned in a spindle side on the magnetic disk plane, namely, the inside peripheral side, and the first magnetic head 1 which is brought into contact unstably with the magnetic disk and has the degree of freedom in all directions is positioned in the opposite side from the spindle center, namely, the outside peripheral side against the second magnetic head 2 on the opposite surface of the magnetic disk. In such a way, the recording and reproducing characteristics of the first magnetic head and the second magnetic head 2 are averaged and become stable ones. Accordingly, the reliability of a magnetic recording and reproducing device using the flexible magnetic disk can be improved.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は磁気記録再生装置に係り、特に、可撓性磁気デ
ィスクの両面に配置された各々の磁気ヘッドからの記録
、再生出力を安定化し、記録、再生情報の信頼度χ向上
させることが可能な磁気記録再生装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and in particular, to a magnetic recording/reproducing device that stabilizes the recording/reproducing output from each magnetic head disposed on both sides of a flexible magnetic disk. The present invention relates to a magnetic recording and reproducing device that can improve the reliability of recorded and reproduced information.

〔従来の技術〕[Conventional technology]

従来技術によるこの種磁気記録再生装置は、可撓性磁気
ディスクの変形に伴う面方向の高さを押え、前記ディス
クと磁気ヘッドの接触を安定にするため、２個の磁気ヘ
ッドのうち第１の磁気ヘッドが全方向に自由度を有する
ように取付けられ、第２の磁気ヘッドが磁気ディスク面
との垂直方向相対高さを最適に固定できるように取付け
られて構成されている。また、この従来技術における第
１および第２の磁気ヘッドの配置は、＠１の磁気ヘッド
を磁気ディスク平面上のスピンドル側、すなわち磁気デ
ィスクの内周側に位置させ、第２の磁気ヘッド！外周側
に位置させている。In this kind of magnetic recording/reproducing device according to the prior art, in order to suppress the height in the surface direction due to deformation of the flexible magnetic disk and to stabilize the contact between the disk and the magnetic head, the first of the two magnetic heads is A second magnetic head is mounted so as to have degrees of freedom in all directions, and a second magnetic head is mounted so as to optimally fix the relative height in the perpendicular direction to the magnetic disk surface. Furthermore, the arrangement of the first and second magnetic heads in this prior art is such that the magnetic head @1 is located on the spindle side on the magnetic disk plane, that is, on the inner peripheral side of the magnetic disk, and the second magnetic head! It is located on the outer periphery.

このような構成の従来技術は、可撓性磁気ディなお、こ
の種従来技術として、例えば、特開昭５３−１４７８９
４号公報、特開昭５４−３４２２１号公報等に記載され
たものが知られている。The conventional technology with such a configuration is a flexible magnetic disk.
4, Japanese Patent Application Laid-Open No. 54-34221, etc. are known.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかし、前記従来技術は、磁気ディスクをスピンドルに
装着したときの歪や、磁気ディスクの回転によって生じ
る磁気ディスクの微少変動によって、前記第１の磁気ヘ
ッドと磁気ディスクとの接触が、前記第２の磁気ヘッド
と磁気ディスクとの接触に比較して不安定であり、最適
状態となっていない場合があった。However, in the prior art, the contact between the first magnetic head and the magnetic disk is caused by distortion when the magnetic disk is mounted on a spindle or minute fluctuations in the magnetic disk caused by rotation of the magnetic disk. The contact between the magnetic head and the magnetic disk is unstable and may not be in an optimal state.

また、一般に、この種磁気記録再生装置は、磁気ディス
クの外周側より内周側が磁気ディスク上の線記録密度が
高くなるため、磁気ディスクの内周側において磁気ヘッ
ドの記録、再生特性が劣化するという特性を有している
。In addition, in general, in this type of magnetic recording/reproducing device, the linear recording density on the magnetic disk is higher on the inner circumference side than on the outer circumference side of the magnetic disk, so the recording and reproduction characteristics of the magnetic head deteriorate on the inner circumference side of the magnetic disk. It has the following characteristics.

従って、前記従来技術においては、磁気ヘッドと磁気デ
ィスクとの接触が不安定で、ある第１の磁気ヘッドが、
さらに記録、再生特性か低下する側、すなわち内周側に
位置されていることＫなる。このため、従来技術による
磁気記録再生装置により、磁気ディスク上を外周側から
内周側に磁気ヘッドを移動させながら情報の記録再生を
行った場合。Therefore, in the prior art, the contact between the magnetic head and the magnetic disk is unstable, and a certain first magnetic head
Furthermore, it is located on the side where the recording and reproducing characteristics deteriorate, that is, on the inner circumferential side. For this reason, when a conventional magnetic recording/reproducing device records and reproduces information while moving a magnetic head from the outer circumferential side to the inner circumferential side on a magnetic disk.

第１の磁気ヘッドと第２の磁気ヘッドの記録、再生特注
に大きな差異が生じてしまう。This results in a large difference in the customization of recording and reproduction between the first magnetic head and the second magnetic head.

第３図はこのような従来技術における第１の磁気ヘッド
と第２の磁気ヘッドの磁気ディスク上のトラック位置に
対する記録、再生特性を位相マージンｎｓＫ＠ｆｋｌｌ
えて示すものであり、１ａは第１の磁気ヘッドの位相マ
ージン特性、２ａ＆工第２のヘッドの位相マージン特性
である。FIG. 3 shows the recording and reproducing characteristics of the first magnetic head and the second magnetic head with respect to the track position on the magnetic disk in such a conventional technique with respect to the phase margin nsK@fkll.
1a is the phase margin characteristic of the first magnetic head, and 2a is the phase margin characteristic of the second magnetic head.

この両ヘッドの位相マージン特性から理解できるように
、内周側圧位置する第１の磁気ヘッドは。As can be understood from the phase margin characteristics of both heads, the first magnetic head is located on the inner peripheral side.

外周側に位＃、する第２の磁気ヘッドに比較して。Compared to the second magnetic head located on the outer circumferential side.

その位相特性マージンが低く、しかも磁気ディスクの内
周側に近づくに従って急速に低下している。The phase characteristic margin is low, and furthermore, it decreases rapidly as it approaches the inner circumference of the magnetic disk.

このように１前記従来技術は、磁気ディスクの回転中、
ディスクとの接触が不安定となりがちな第１の磁気ヘッ
ドを内周側に位置させたことにより、第１の磁気ヘッド
の記録、再生特注が、特に記録密度の高い磁気ディスク
の内周側で悪化するという問題点があり、このため、記
録、再生情報の信頼性を低下させているという問題点が
ある。In this way, 1. in the prior art, during the rotation of the magnetic disk,
By locating the first magnetic head on the inner side, where contact with the disk tends to be unstable, recording and playback of the first magnetic head can be customized, especially on the inner side of a magnetic disk with high recording density. There is a problem in that the reliability of recorded and reproduced information is lowered.

本発明の目的は、前記従来技術の問題点ｌ解決し、第１
の磁気ヘッドと第２の磁気ヘッドの記録。The purpose of the present invention is to solve the problems of the prior art, and
magnetic head and a second magnetic head.

再生特性を平均化することくよって安定させ、記録、再
生情報の信頼性を向上させることのできる高性能な高密
度の情報の記録再生を可能とする磁気記録再生装置を提
供することにある。It is an object of the present invention to provide a magnetic recording and reproducing device that can record and reproduce high-performance, high-density information that can stabilize the reproduction characteristics by averaging them and improve the reliability of recorded and reproduced information.

〔問題点を解決するための手段〕[Means for solving problems]

本発明によれば前記目的は、可撓性磁気ディスクとの接
触が極めて安定しているディスク面圧対して固定した高
さを有する第２の磁気ヘッドを。According to the present invention, the object is to provide a second magnetic head having a fixed height with respect to the disk surface pressure, which makes contact with a flexible magnetic disk extremely stable.

磁気ディスク平面上のスピンドル側、すなわち内周側に
位置させ、磁気ディスクとの接触が不安定な全方向に自
由度を持つ第１の磁気ヘッドを、磁気ディスク反対面上
の前記第２の磁気ヘッドに対してスピンドル中心から反
対側すなわち外周側に位させることにより達成される。A first magnetic head, which is located on the spindle side, that is, on the inner circumferential side on the plane of the magnetic disk, and has degrees of freedom in all directions with unstable contact with the magnetic disk, is connected to the second magnetic head on the opposite surface of the magnetic disk. This is achieved by positioning the head on the opposite side from the spindle center, that is, on the outer circumferential side.

〔作　用〕[For production]

第２の磁気ヘッドは、可撓性磁気ディスクとの接触が安
定しているため、安定した記録、再生特性！示すが、＠
１の磁気ヘッドより内周側に位置し、磁気ディスクに対
する磁気ヘッド位置半径が常に第１の磁気ヘッドの磁気
ヘッド位置牛後より小さくなっている。そのため、第２
の磁気ヘッドは、常に第１の磁気ヘッドより高線記録密
度で情報の記録、再生を行っており、内周側に行くに従
つ℃記録、再生特性が除々劣化する。The second magnetic head has stable contact with the flexible magnetic disk, so it has stable recording and playback characteristics! I will show you @
The magnetic head is located on the inner circumferential side than the first magnetic head, and the magnetic head position radius with respect to the magnetic disk is always smaller than the magnetic head position radius of the first magnetic head. Therefore, the second
The magnetic head always records and reproduces information at a higher linear recording density than the first magnetic head, and the recording and reproduction characteristics gradually deteriorate as the temperature increases toward the inner circumference.

また、第１の磁気ヘッドは、可撓性磁気ディスクとの接
触が不安定であるため、安定した記録。Furthermore, since the first magnetic head makes unstable contact with the flexible magnetic disk, stable recording is possible.

再生特性は示さないが、線記録密度による記録。Although it does not exhibit playback characteristics, it is recorded using linear recording density.

再生特性の劣化が第２の磁気ヘッドに比較して小さくな
り、不安定ながら高い記録、再生特性ケ示す。The deterioration of the reproduction characteristics is smaller than that of the second magnetic head, and the magnetic head exhibits high recording and reproduction characteristics, although unstable.

従って、第１の磁気ヘッドと第２の磁気ヘッドの記録再
生特性は、平均化され安定なものとなる。Therefore, the recording and reproducing characteristics of the first magnetic head and the second magnetic head are averaged and stable.

これにより、可撓性磁気ディスクを用いた磁気記録再生
装置の信頼性を向上させることができる。This makes it possible to improve the reliability of a magnetic recording/reproducing device using a flexible magnetic disk.

〔実ＭｆｌＪ］ 以下、本発明による磁気記録再生装置の一実施例を図面
により説明する。[Actual MflJ] Hereinafter, one embodiment of the magnetic recording/reproducing apparatus according to the present invention will be described with reference to the drawings.

第１図は本発明の一実施例の構成図、第２図は本発明の
一実施例くおける磁気ヘッドの位相マージン特性を示す
図である。第１図において、１は第１の磁気ヘッド、２
は第２の磁気ヘッド、３は可撓性磁気ディスク、４はス
ピンドル中心、５はジンバルバネ、６は押えバネ、７は
板バネ％８はキャリッジブロック、９は支持アームであ
る。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing phase margin characteristics of a magnetic head in an embodiment of the present invention. In FIG. 1, 1 is a first magnetic head, 2
3 is a second magnetic head, 3 is a flexible magnetic disk, 4 is a spindle center, 5 is a gimbal spring, 6 is a presser spring, 7 is a leaf spring, 8 is a carriage block, and 9 is a support arm.

本発明による磁気記録再生装置の一実施例は。An embodiment of the magnetic recording/reproducing apparatus according to the present invention is as follows.

第１図に示すように、可撓性磁気ディスク３と、キャリ
ッジブロック８に前記可撓性磁気ディスク３を両側から
挟むように取付けられた第１及び第２の磁気ヘッド１．
２とＫより構成される。可撓性Ｓ気ディスク３を挟んで
、磁気ディスク３に押し付は力を加えるとともに、全方
向に自由度を持たせるためのジンバルバネ５な介して支
持アーム９に取付けられた第１の磁気ヘッド１は、可撓
性磁気ディスク３０回転中心となるスピンドル中心４か
ら見て後述する磁気ヘッド２より外周に位置するように
配置されている。また、前記第１の磁気ヘッド１に対し
て、可撓性磁気ディスク３を挟んだ反対面に位置し、前
記磁気ディスク３０面圧対して垂直方向にのみ固定して
キャリッジブロック８に直接固定ヘッドとして取付けら
れた第２の磁気ヘッド２は、前記第１の磁気ヘッドより
内周側に配置される。第１の磁気ヘッド１′ｆｔ支持し
ている支持アーム９は、板バネ７１介してキャリッジブ
ロック８に保持されており、押えバネ６により可撓性磁
気ディスク３に対する押し付は力を得るように構成され
ている。As shown in FIG. 1, a flexible magnetic disk 3, and first and second magnetic heads 1. mounted on a carriage block 8 so as to sandwich the flexible magnetic disk 3 from both sides.
It consists of 2 and K. A first magnetic head is attached to a support arm 9 via a gimbal spring 5 to apply pressure to the magnetic disk 3 with the flexible magnetic disk 3 in between, and to provide freedom in all directions. 1 is arranged so as to be located on the outer periphery of the magnetic head 2, which will be described later, when viewed from the spindle center 4, which is the center of rotation of the flexible magnetic disk 30. Further, the head is located on the opposite side of the first magnetic head 1 with the flexible magnetic disk 3 interposed therebetween, and is directly fixed to the carriage block 8 by being fixed only in a direction perpendicular to the surface pressure of the magnetic disk 30. The second magnetic head 2 mounted as a magnetic head is disposed on the inner circumferential side of the first magnetic head. The support arm 9 supporting the first magnetic head 1'ft is held by the carriage block 8 via a plate spring 71, and is pressed against the flexible magnetic disk 3 by a presser spring 6 so as to obtain force. It is configured.

このよう忙構成された磁気記録再生装置において、磁気
ヘッド１ｅ　　２　ｗ　１ｉＢ気デイスク３上を移動さ
せて、情報の記録、再生動作が行われた場合。In the magnetic recording and reproducing apparatus having such a busy configuration, when the magnetic head 1e 2 w 1iB is moved over the disk 3 to record and reproduce information.

第１および第２の磁気ヘッド１．２の磁気ディスク３の
トラック位置に対する位相マージン特性は第２図に示す
特注１ｂ、２ｂのようになる。すなわち、第１の磁気ヘ
ッドｌは、全力向の自由度を持つジンバルバネ５に取付
けられており、磁気ディスク３と該第１の磁気ヘッドと
の接触が不安定ながらも、第２の磁気ヘッド２に較べ磁
気ディスクの外周側に位置するため、その記録磁界の反
転幅が長くなることによつ、その位相マージンは特性１
ｂの如く良好である。しかし、磁気ディスク３の記録、
再生が磁気ディスク３の最内周側に移動する忙従い、第
１の磁気ヘッド１と磁気ディスク３の接触が不安定さを
増し、第１の磁気ヘッドｌの位相マージンは徐々に低下
する。この第１の磁気ヘッドの位相マージン特性は、第
３囚に示した従来技術の場合に比較して大幅に改善され
、特にこの改善効果は、記録密度が高くなる磁気ディス
ク３の内周部において顕著となる。The phase margin characteristics of the first and second magnetic heads 1.2 with respect to the track position of the magnetic disk 3 are as shown in custom orders 1b and 2b shown in FIG. That is, the first magnetic head 1 is attached to a gimbal spring 5 that has a degree of freedom in all directions, and even though the contact between the magnetic disk 3 and the first magnetic head is unstable, the second magnetic head 2 Since it is located on the outer peripheral side of the magnetic disk compared to the magnetic disk, the reversal width of the recording magnetic field becomes longer, and the phase margin is
It is in good condition as shown in b. However, the recording on the magnetic disk 3,
As reproduction moves to the innermost circumferential side of the magnetic disk 3, the contact between the first magnetic head 1 and the magnetic disk 3 becomes increasingly unstable, and the phase margin of the first magnetic head l gradually decreases. The phase margin characteristics of this first magnetic head are significantly improved compared to the case of the conventional technology shown in Part 3, and this improvement effect is particularly noticeable in the inner circumference of the magnetic disk 3 where the recording density is high. It becomes noticeable.

前述の本発明の実施例において、第２の磁気ヘッド２は
、可撓性磁気ディスク３０面に対して垂直方向に固定さ
れている固定ヘッドであるとしたが、この磁気ヘッド２
は、垂直方向に固定されていれば、磁気ディスク３０回
転時のうねり等に沿うように回転方向にのみ、あるいは
垂直方向以外の全方向に移動可能なものであってもよく
、また、全く固定的に取付けられたものであってもよい
。In the embodiment of the present invention described above, the second magnetic head 2 is a fixed head fixed perpendicularly to the surface of the flexible magnetic disk 30.
As long as it is fixed in the vertical direction, it may be movable only in the rotational direction to follow the undulations when the magnetic disk rotates 30 times, or in all directions other than the vertical direction, or it may not be fixed at all. It may be attached to the

さらに、このＷＪ２の磁気ヘッド２は％第１の磁気ヘッ
ド１に用いられているジンバルバネ５に比較して、はる
かに剛性の高い支持バネな用いて全力向に自由度を持つ
ように支持されたものであってもよい。Furthermore, the magnetic head 2 of this WJ2 is supported with a degree of freedom in all directions using a support spring that is much more rigid than the gimbal spring 5 used in the first magnetic head 1. It may be something.

〔発明の効果〕〔Effect of the invention〕

以上説明したように１本発明によれば、可撓性磁気ディ
スクの両面に情報の記録、再生７行う２個の磁気ヘッド
、より成る磁気記録再生装置において％２個の磁気ヘッ
ドによる記録、再生特性を平均化させ、かつ安定化させ
ることができ、これにより、磁気記録装置の高記録密度
化、大容量化。As explained above, according to the present invention, in a magnetic recording/reproducing device comprising two magnetic heads for recording and reproducing information on both sides of a flexible magnetic disk, recording and reproducing are performed by %2 magnetic heads. Characteristics can be averaged and stabilized, thereby increasing the recording density and capacity of magnetic recording devices.

高信頼度化を計ることができろ。Be able to measure high reliability.

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

＠Ｉ因は本発明による磁気記録再生装置の一実施例の構
成図、第２図はこの実施例における磁気ヘッドの位相マ
ージン特性を示す図、＠３因は従来技術における磁気ヘ
ッドの位相マージン特性を示す図である。 １・・・・・・第１の磁気ヘッド、２・・・・・・第２
の磁気ヘッド、３・・・・・・可撓性磁気ディスク、４
・・・・・・スピンドル中心、５・・・・・・ジンバル
バネ、６・・・・・・押えバネ。 ７・・・・・・板バネ、８・・・・・・キャリッジブロ
ック、９・・・・・・支持アーム。 代理人　弁理士　武　顕次部（ほか１名）Ｗ１１図 第２図　　　　　　第３図@I factor is a configuration diagram of an embodiment of the magnetic recording/reproducing device according to the present invention, Figure 2 is a diagram showing the phase margin characteristics of the magnetic head in this embodiment, @3 factor is the phase margin characteristic of the magnetic head in the conventional technology FIG. 1...First magnetic head, 2...Second magnetic head
magnetic head, 3...flexible magnetic disk, 4
... Spindle center, 5 ... Gimbal spring, 6 ... Presser spring. 7... Leaf spring, 8... Carriage block, 9... Support arm. Agent: Patent attorney Kenjibe Take (and one other person) W11 Figure 2 Figure 3

Claims (1)

【特許請求の範囲】[Claims] １、可撓性磁気ディスクの両面にそれぞれ磁気ヘッドを
接触させて情報の記録再生を行い、前記磁気デイスクに
接触する第１の磁気ヘッドには、全方向の自由度を持た
せ、前記磁気ディスクに接触する第２の磁気ヘッドには
、前記磁気ディスクの垂直方向にのみ固定位置を持たせ
た磁気記録再生装置において、前記第２の磁気ヘッドを
前記第１の磁気ヘッドより、前記磁気ディスクの中心側
に位置させたことを特徴とする磁気記録再生装置。1. Recording and reproducing information is performed by bringing magnetic heads into contact with both sides of a flexible magnetic disk, and the first magnetic head that contacts the magnetic disk is given a degree of freedom in all directions, In a magnetic recording/reproducing apparatus in which a second magnetic head in contact with the magnetic disk has a fixed position only in the perpendicular direction of the magnetic disk, the second magnetic head is placed in contact with the magnetic disk in a direction that is lower than the first magnetic head. A magnetic recording/reproducing device characterized in that it is located on the center side.
JP25199386A 1986-10-24 1986-10-24 Magnetic recording and reproducing device Pending JPS63106913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25199386A JPS63106913A (en) 1986-10-24 1986-10-24 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25199386A JPS63106913A (en) 1986-10-24 1986-10-24 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS63106913A true JPS63106913A (en) 1988-05-12

Family

ID=17231050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25199386A Pending JPS63106913A (en) 1986-10-24 1986-10-24 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS63106913A (en)

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