JPH01298516A - Video signal recording and reproducing device - Google Patents

Video signal recording and reproducing device

Info

Publication number
JPH01298516A
JPH01298516A JP13056688A JP13056688A JPH01298516A JP H01298516 A JPH01298516 A JP H01298516A JP 13056688 A JP13056688 A JP 13056688A JP 13056688 A JP13056688 A JP 13056688A JP H01298516 A JPH01298516 A JP H01298516A
Authority
JP
Japan
Prior art keywords
head
azimuth
reproduction
drum
playback
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
JP13056688A
Other languages
Japanese (ja)
Inventor
Hidehiko Nakatani
英彦 中谷
Kikuo Sagara
相良　喜久雄
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13056688A priority Critical patent/JPH01298516A/en
Publication of JPH01298516A publication Critical patent/JPH01298516A/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
    • 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
    • G11B5/52—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 simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support
    • G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis

Abstract

PURPOSE:To remove the vertical oscillation, skew, etc., on a television receiver and to obtain a reproduced image with improved quality by fixing the 1st head arranged oppositely to a rotating drum at 180 deg. position on the drum and fitting the 2nd head to a head driving part. CONSTITUTION:A head 5a capable of changing its azimuth angle is arranged oppositely to a fixed head 5b. In normal reproduction, the azimuth angles of the opposed heads are reversed to each other. Namely, the azimuth of the head 5a capable of changing its azimuth is reversed to that of the fixed head 5b. In case of specific reproduction, e.g. field reproduction based upon still reproduction, double speed reproduction, rapid reproduction, etc., the azimuth of the head 5a is allowed to coincide with that of the head 5b. Consequently, the heads to be used are arranged while accurately keeping 180 deg. in any case, the reverse azimuth or the same azimuth in the azimuth relation can be optionally selected.

Description

【発明の詳細な説明】 ［産業上の利用分野コ この発明は例えばビデオ・テープ・レコーダ（以下ＶＴ
Ｒと略記）に関し、特にＶＴＲの再生画質を改善するた
めになされたもので、回転するドラムに設けられたビデ
オ・ヘッドを磁気テープの長手方向に移動可能となして
磁気記録跡を忠実にトレースさせるようにした回転ドラ
ム装置のヘッド制御に関する。[Detailed Description of the Invention] [Industrial Field of Application] This invention is applicable to, for example, a video tape recorder (hereinafter referred to as VT).
(abbreviated as "R"), it was developed specifically to improve the playback quality of VTRs, and the video head installed on a rotating drum was made movable in the longitudinal direction of the magnetic tape to faithfully trace the magnetic recording traces. The present invention relates to head control of a rotating drum device that allows

［従来の技術］ 第６図は従来の回転ドラム装置を示す断面図であり、図
において、（１）は回転軸、（２）は固定の下ドラム、
（３）は回転する上ドラム、（４）は上ドラム（３）に
脱着自在にネジ止めされたヘッド台、（５）はヘッド台
（４）の先端に固着されたヘッド、（６）は下ドラム（
２）に対して回転軸（１）が自由に回転しうるようにな
したベアリング、（７）は上ドラム（３）と共に回転す
る上トランス、（８）は静止した下トランス、（９）は
回転軸（１）に支持されていて上ドラム（３）を担持す
る台座、（１３）は磁気テープである。[Prior Art] Fig. 6 is a sectional view showing a conventional rotating drum device, in which (1) is a rotating shaft, (2) is a fixed lower drum,
(3) is a rotating upper drum, (4) is a head stand that is removably screwed to the upper drum (3), (5) is a head that is fixed to the tip of the head stand (4), and (6) is Lower drum (
2) is a bearing that allows the rotating shaft (1) to rotate freely, (7) is an upper transformer that rotates together with the upper drum (3), (8) is a stationary lower transformer, and (9) is a The pedestal (13) supported by the rotating shaft (1) and carrying the upper drum (3) is a magnetic tape.

ヘッド（５）は上ドラム（３）に対して固定した位置に
保持されており、その先端は上ドラム（３）の外周より
少し突出している。上ドラム（３）は一定の高速度で回
転せしめられる。かかる上ドラム（３）と下ドラム（２
）との外周面に磁気テープ（１３）がやや斜めに巻き付
けられて所定の速度で走行する。かくしてヘッド（５）
は磁気テープ（１３）に接触して磁気的に映像（または
音声）信号を記録または再生する。The head (5) is held at a fixed position relative to the upper drum (3), and its tip protrudes a little beyond the outer periphery of the upper drum (3). The upper drum (3) is rotated at a constant high speed. The upper drum (3) and lower drum (2)
) A magnetic tape (13) is wound slightly diagonally around the outer peripheral surface of the magnetic tape (13) and runs at a predetermined speed. Thus the head (5)
contacts the magnetic tape (13) to magnetically record or reproduce video (or audio) signals.

上トランス（７）は台座（９）に取り付けられて台座（
９）と共に回転する。ヘッド（５）は接続部（１０）、
配線板（１１）、接続部Ｃｌ２）を経て上トランス（１
）に接続されている。下トランス（８）は微小な間隔を
置いて上トランス（７）に対面している。上下トランス
（７）、　（８）は磁気的に結合されていて信号を相互
に伝達する。下トランス（８）は外部に設けた信号処理
装置（図示せず）に接続されている。また（７５）は上
ドラム（３）に取り付けられた磁石であり、（１８）は
磁石（７５）の磁力線を感知して上ドラム（３）の回転
位置を検知する回転位置検知器である。The upper transformer (7) is attached to the pedestal (9) and the pedestal (
9). The head (5) has a connecting part (10),
The upper transformer (1) passes through the wiring board (11) and the connection part Cl2).
)It is connected to the. The lower transformer (8) faces the upper transformer (7) with a small distance therebetween. The upper and lower transformers (7) and (8) are magnetically coupled and mutually transmit signals. The lower transformer (8) is connected to an external signal processing device (not shown). Further, (75) is a magnet attached to the upper drum (3), and (18) is a rotational position detector that detects the rotational position of the upper drum (3) by sensing the lines of magnetic force of the magnet (75).

第７図（ａ）に一般的なスリーヘッドの配置を、第７図
（ｂ）にアジマス角と取付は位置を示す。FIG. 7(a) shows the general three-head arrangement, and FIG. 7(b) shows the azimuth angle and mounting position.

ヘッド台（４）は上ドラム（３）に相対して２個取り付
けてあり、一方のヘッド台（４）には第１のヘッド（５
ａ）と第２のヘッド（５ａ’）の２個のヘッドが配置さ
れ、他方のヘッド台（４）には第３のヘッド（５ｂ）の
１個が配置されている。各ヘッドのアジマスは第２のヘ
ッド（５ａ’）と第３のヘッド（５ｂ）が同一で、第１
のヘッド（５ａ）は異なる。Two head stands (4) are attached opposite to the upper drum (3), and one head stand (4) is equipped with a first head (5).
Two heads, a) and a second head (5a'), are arranged, and one third head (5b) is arranged on the other head stand (4). The azimuth of each head is the same for the second head (5a') and the third head (5b), and
The head (5a) of is different.

そして、第１のヘッド（５ａ）と第３のヘッド（５ｂ）
とは正確に１８０°の位置となるよう構成されている。Then, the first head (5a) and the third head (5b)
is configured to be at exactly 180° position.

そして第２のヘッド（５ｂ）とほぼ１８０゛の位置にあ
る。It is located approximately 180 degrees from the second head (5b).

次に動作について説明する。記録時には、対向する第１
のヘッド（５ａ）と第３のヘッド（５ｂ）を使用する。Next, the operation will be explained. When recording, the first
The first head (5a) and the third head (5b) are used.

また通常再生時にも対向する第１のヘッド（５ａ）と第
３のヘッド（５ｂ）を使用する。従って第１のヘッド（
５ａ）と第３のヘッド（５ｂ）とが基本のヘッドとなる
。しかしながら特殊再生、例えばスチル再生（静止画再
生）で、第１のヘッド（５ａ）と第３のヘッド（５ｂ）
とを用いると、いわゆるフレームスチル再生となり、二
重像が出現し、視覚妨害となる。そこで、この対策とし
て互いに同じアジマス角の第２のヘッド（５ａ’）と第
３のヘッド（５ｂ）とを用いた、いわゆるフィールドス
チル再生を行い改善している。スチル再生以外でもスロ
ー再生、１，５倍速再生、２倍速再生、高速再生等にお
いてもフィールド再生を行っている場合がある。Also, during normal playback, the first head (5a) and the third head (5b) facing each other are used. Therefore, the first head (
5a) and the third head (5b) are the basic heads. However, in special playback, for example still playback (still image playback), the first head (5a) and the third head (5b)
If this is used, so-called frame still reproduction will occur, and a double image will appear, resulting in visual disturbance. Therefore, as a countermeasure to this problem, so-called field still reproduction is performed using a second head (5a') and a third head (5b) having the same azimuth angle. In addition to still playback, field playback may also be performed in slow playback, 1.5x speed playback, 2x speed playback, high speed playback, etc.

［発明が解決しようとする課題］ 従来の映像再生装置では、以上のように構成されるので
第２のヘッド（５ａ“）と第３のヘッド（５ｂ）との角
度が１８０°から少しずれているので、再生信号内の垂
直同期信号の周期が一周期毎に異なり、一部のテレビジ
ョン受像機では垂直のゆれ、スキュー等が発生するとい
う問題があった。[Problems to be Solved by the Invention] In the conventional video playback device, which is configured as described above, the angle between the second head (5a'') and the third head (5b) is slightly deviated from 180°. As a result, the period of the vertical synchronizing signal in the reproduced signal differs from period to period, causing problems such as vertical fluctuations and skews in some television receivers.

この発明は上記のような問題点を解消するためになされ
たもので、再生信号内の垂直同期信号の周期を一定にな
し、テレビジョン受像機での垂直のゆれ、スキュー等を
なくし、よりよい画質の再生映像を得ることを目的とす
る。This invention was made to solve the above-mentioned problems, and it makes the period of the vertical synchronization signal in the reproduced signal constant, eliminates vertical fluctuations, skews, etc. in the television receiver, and makes it even better. The purpose is to obtain high-quality playback video.

［１Ｊｉ１題を解決するための手段］ この発明に係る映像信号再生装置はヘッドのアジマス角
度を変化させることにより、再生に用いる二つのヘッド
（５ａ）、　（５ｂ）は正確に１８０゜に対向した位置
を保ち同一アジマスにすることにより再生信号内の垂直
同期信号の周期を一定にしたものである。[Means for Solving Problem 1Ji1] The video signal reproducing device according to the present invention changes the azimuth angle of the head so that the two heads (5a) and (5b) used for reproduction are accurately opposed to each other at 180°. By maintaining the position and keeping the same azimuth, the period of the vertical synchronization signal in the reproduced signal is made constant.

［作用］ この発明におけるヘッドのアジマス角度を制御すること
により再生に使用しているヘッドの位置は正確に１８０
°のままで同一アジマスにす　・る。[Operation] By controlling the azimuth angle of the head in this invention, the position of the head used for reproduction can be accurately set at 180 degrees.
Leave it at ° to make the same azimuth.

［実施例］ 以下この発明の構成要素である回転ドラムの一実施例を
第１図乃至第４図について説明する。[Embodiment] An embodiment of a rotating drum which is a component of the present invention will be described below with reference to FIGS. 1 to 4.

第１図はこの発明による回転ドラムの主要部を示す縦断
面図、第２図はその平面図、第３図はこの発明の主要部
を更に詳細に示す縦断面図、第４図は第３図の底面図で
あり、これらの図において、（１）〜（３）、　（５）
〜（１３）は従来の装置と同じ部材を示す。（４ａ）は
ヘッド（５）を担持してヘッド（５）のアジマス角度を
制御して変化させるようになっている駆動部、（１４）
は駆動部（４ａ）に制御電流を供給するための回転しな
い接触子、（１５）は接触子（１４）と摺動接触するよ
うに台座（９）の一部に設けられて回転する電極、（１
６）は電極（１５）から配線板（１１）を経由して駆動
部（４ａ）に電気接続する接続部である。FIG. 1 is a longitudinal sectional view showing the main part of the rotating drum according to the invention, FIG. 2 is a plan view thereof, FIG. 3 is a longitudinal sectional view showing the main part of the invention in more detail, and FIG. FIG. 2 is a bottom view of the figures;
-(13) show the same members as the conventional device. (4a) is a drive unit that supports the head (5) and controls and changes the azimuth angle of the head (5); (14)
(15) is a rotating electrode provided on a part of the base (9) so as to be in sliding contact with the contact (14); (1
Reference numeral 6) denotes a connection part that electrically connects the electrode (15) to the drive part (4a) via the wiring board (11).

特に第３図および第４図を参照して、（４１）は先端に
ヘッド（５）を取り付けた非磁性体の板バネ、（４２）
は板バネ（４１）に取り付けられた円筒形コイル、（４
３）は円筒形コイル（４２）を上下に移動させるために
磁気的反作用を生ぜしめる円柱形永久磁石、（４４）は
円柱形永久磁石（４３）を担持して上ドラム（３）に装
着された強磁性体のヨーク、（４５）はヨーク（４４）
に取り付けられて円柱形永久磁石（４３）と共に磁気的
閉回路を構成するための強磁性体板である。この強磁性
体板（４５）はヘッド（５）から遠ざかる方向に延びて
おり、そこで取付部（４５ａ）を形成している。（４６
）は取付部（４５ａ）に取り付けられるネジ、（４８）
は座金、（４９）はヨーク（４４）を上ドラム（３）に
取り付けるネジ穴、（４７）、　（５０）は板バネ（４
１）をエツジで支え、支点となる支柱である。支柱（４
７）はヨーク（４４）に固着され板バネ（４１）を上か
ら支え、支柱（５０）はネジ（４６）により取付部（４
５ａ）に取り付けられ板バネ（４１）を下から支える。Particularly with reference to FIGS. 3 and 4, (41) is a non-magnetic plate spring with a head (5) attached to its tip; (42)
is a cylindrical coil attached to a leaf spring (41), (4
3) is a cylindrical permanent magnet that produces a magnetic reaction in order to move the cylindrical coil (42) up and down, and (44) is a cylindrical permanent magnet (44) that is attached to the upper drum (3) and carries a cylindrical permanent magnet (43). A ferromagnetic yoke (45) is a yoke (44)
This is a ferromagnetic plate attached to the cylindrical permanent magnet (43) to form a magnetic closed circuit. This ferromagnetic plate (45) extends in a direction away from the head (5) and forms a mounting portion (45a) there. (46
) is a screw attached to the mounting part (45a), (48)
(49) is the screw hole for attaching the yoke (44) to the upper drum (3), (47) and (50) are the leaf springs (4).
1) It is a support that supports the edge and serves as a fulcrum. Pillar (4
7) is fixed to the yoke (44) and supports the leaf spring (41) from above, and the support column (50) is fixed to the mounting part (4) with the screw (46).
5a) and supports the leaf spring (41) from below.

板バネ（４１）はその自由端部が可動であり、板バネ（
４１）が担持している円筒形コイル（４２）は円柱形永
久磁石（４３）と強磁性体板（４５）との間に形成され
た環状ギャップに配置されていて上下に変位可能である
。それで、円筒形コイル（４２）に制御電流を通すこと
によりコイル（４２）に適当な磁束を生せしめて永久磁
石（４３）との相互作用によりコイル（４２）は上下に
変位する。これに伴って板バネ（４１）が支点を中心に
回動する。かくしてヘッド（５）のアジマス角度が変化
する。永久磁石（４３）、ヨーク（４４）Ｊよび強磁性
体板（４５）から高磁束の磁気閉回路いおいて、その永
久磁石（４３）と強磁性体板（４５）との間に環状ギャ
ップ内に位置する円筒形コイル（４２）がその制御電流
により永久磁石（４３）に対して磁気力を作用させて、
板バネ（４１）の自由端を変位させることができるので
あるが、ヘッド（５）に向かう磁束もれを防ぐために強
磁性体板（４５）の延長部である取付部（４５ａ）はヘ
ッド（５）より遠ざけて配置している。The leaf spring (41) has a movable free end, and the leaf spring (41) has a movable free end.
The cylindrical coil (42) carried by the magnet 41) is disposed in an annular gap formed between the cylindrical permanent magnet (43) and the ferromagnetic plate (45) and is vertically displaceable. Therefore, by passing a control current through the cylindrical coil (42), a suitable magnetic flux is generated in the coil (42), and the coil (42) is displaced up and down by interaction with the permanent magnet (43). Along with this, the leaf spring (41) rotates around the fulcrum. Thus, the azimuth angle of the head (5) changes. A high magnetic flux magnetic closed circuit is formed from the permanent magnet (43), the yoke (44) J, and the ferromagnetic plate (45), and an annular gap is formed between the permanent magnet (43) and the ferromagnetic plate (45). A cylindrical coil (42) located inside exerts a magnetic force on the permanent magnet (43) by its control current,
The free end of the leaf spring (41) can be displaced, but in order to prevent magnetic flux from leaking toward the head (5), the attachment part (45a), which is an extension of the ferromagnetic plate (45), is attached to the head (5). 5) They are placed further apart.

第５図に示すように、固定のヘッド（５ｂ）に対向して
、アジマス角度が変化可能なヘッド（５ａ）が配置され
ている。ここで通常の再生では対向するヘッドが逆アジ
マスになるようにする。つまり、駆動部（４ａ）を制御
することにより固定のヘッド（５ｂ）に対してアジマス
角度が変化可能なヘッド（５ａ）のアジマスが逆アジマ
スとなるようにする。次に特殊再生、例えばスチル再生
、倍速再生、高速再生等でフィールド再生を行う場合、
対向するヘッドと同一アジマスとなるようにする。つま
り、駆動部（４ａ）を制御し、固定のヘッド（５ｂ）に
対してアジマス角度が変化可能なヘッド（５ａ）のアジ
マスが同一アジマスとなるようにする。このようにする
ことによりいずれの場合でも使用するヘッドの配置が正
確に１８０゜に保て、アジマスの関係が逆アジマス、同
一アジマスを自由に選べる。As shown in FIG. 5, a head (5a) whose azimuth angle can be changed is arranged opposite to a fixed head (5b). In normal playback, the opposing heads are set to have opposite azimuths. In other words, by controlling the drive unit (4a), the azimuth of the head (5a) whose azimuth angle can be changed relative to the fixed head (5b) is set to be the opposite azimuth. Next, when performing field playback using special playback, such as still playback, double-speed playback, or high-speed playback,
Make sure it has the same azimuth as the opposing head. That is, the drive unit (4a) is controlled so that the azimuth of the head (5a) whose azimuth angle can be changed is the same as that of the fixed head (5b). By doing this, the arrangement of the heads used can be maintained at exactly 180 degrees in any case, and the azimuth relationship can be freely selected between reverse azimuth and the same azimuth.

［発明の効果コ 以上のように、この発明によれば使用するへラドの配置
を常に１８０°に保て、再生信号内の垂直同期信号の周
期が一周期毎に異なることもなく、テレビジョン受像機
での垂直のゆれ、スキュー等がなく、よりよい画質の再
生画像が得られる。[Effects of the Invention] As described above, according to the present invention, the arrangement of the helads used can always be kept at 180 degrees, the period of the vertical synchronization signal in the reproduced signal does not differ from period to period, and the television There is no vertical shaking or skew on the receiver, and reproduced images of better quality can be obtained.

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

第１図はこの発明の構成要素である回転ドラムの主要部
を示す断面図、第２図はその平面図、第３図はこの発明
の主要部を更に詳細に示す縦断面図、第４図は第３図の
底面図、第５図は本発明のヘッド配置図、第６図は従来
の回転ドラムを示す断面図、第７図（ａ）、　（ｂ）は
ヘッド配置図と取付は位置を示す図である。 図において、（３）は回転するドラム、（５）はヘッド
、（１３）はテープ、（４ａ）は磁気ヘッド駆動部、（
４１）は板バネ、（４２）は円形コイル、（４３）は円
柱形永久磁石、（４４）はヨークである。 なお、各図中同一符号は同一または相当部を示す。FIG. 1 is a sectional view showing the main part of a rotating drum which is a component of this invention, FIG. 2 is a plan view thereof, FIG. 3 is a longitudinal sectional view showing the main part of this invention in more detail, and FIG. 4 is a bottom view of Fig. 3, Fig. 5 is a head arrangement diagram of the present invention, Fig. 6 is a sectional view showing a conventional rotating drum, and Figs. 7 (a) and (b) are head arrangement diagrams and mounting positions. FIG. In the figure, (3) is a rotating drum, (5) is a head, (13) is a tape, (4a) is a magnetic head drive unit, (
41) is a leaf spring, (42) is a circular coil, (43) is a cylindrical permanent magnet, and (44) is a yoke. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] （１）回転するドラムに１８０゜の位置で対向して配置
されている第１のヘッドと第２のヘッドとを有する映像
信号記録再生装置において、前記第１のヘッドは前記ド
ラムに固着し、前記第２のヘッドはアジマス角度を制御
可能ならしめるために制御下に可動であるヘッド駆動部
に装着されたことを特徴をする映像信号記録再生装置。(1) In a video signal recording and reproducing device having a first head and a second head disposed opposite to each other at a position of 180 degrees to a rotating drum, the first head is fixed to the drum, A video signal recording and reproducing apparatus, wherein the second head is mounted on a head drive unit that is movable under control so that the azimuth angle can be controlled.
JP13056688A 1988-05-26 1988-05-26 Video signal recording and reproducing device Pending JPH01298516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13056688A JPH01298516A (en) 1988-05-26 1988-05-26 Video signal recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13056688A JPH01298516A (en) 1988-05-26 1988-05-26 Video signal recording and reproducing device

Publications (1)

Publication Number Publication Date
JPH01298516A true JPH01298516A (en) 1989-12-01

Family

ID=15037317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13056688A Pending JPH01298516A (en) 1988-05-26 1988-05-26 Video signal recording and reproducing device

Country Status (1)

Country Link
JP (1) JPH01298516A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04321916A (en) * 1991-04-17 1992-11-11 Mitsubishi Electric Corp Magnetic head driving device
US5757589A (en) * 1994-11-21 1998-05-26 Daewoo Electronics, Co., Ltd Head device provided with a reciprocating actuator for alternating an azimuth angle of a magnetic gap

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04321916A (en) * 1991-04-17 1992-11-11 Mitsubishi Electric Corp Magnetic head driving device
US5757589A (en) * 1994-11-21 1998-05-26 Daewoo Electronics, Co., Ltd Head device provided with a reciprocating actuator for alternating an azimuth angle of a magnetic gap

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