JPS59160823A - Head driving mechanism - Google Patents

Head driving mechanism

Info

Publication number
JPS59160823A
JPS59160823A JP3526883A JP3526883A JPS59160823A JP S59160823 A JPS59160823 A JP S59160823A JP 3526883 A JP3526883 A JP 3526883A JP 3526883 A JP3526883 A JP 3526883A JP S59160823 A JPS59160823 A JP S59160823A
Authority
JP
Japan
Prior art keywords
head
fixed
rotating drum
drum
rotational axis
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
JP3526883A
Other languages
Japanese (ja)
Inventor
Katsumi Okada
克巳 岡田
Munehisa Takeda
宗久 武田
Koji Naemura
康次 苗村
Mataichiro Kiso
木曽　又一郎
Taizo Kojima
泰三 小島
Hitoshi Oota
斉 太田
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 JP3526883A priority Critical patent/JPS59160823A/en
Publication of JPS59160823A publication Critical patent/JPS59160823A/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
    • 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

PURPOSE:To allow a head to trace a recording track accurately by moving the head in the same direction with the rotational axis line of a rotary drum and utilizing a permanent magnet and an electromagnetic coil. CONSTITUTION:One terminal of an elastic member 15 which extends toward the direction crossing the rotational axis line of the rotary drum 3 is fixed thereto and the head 8 is fixed to the other terminal, so that the head 8 is movable in the same direction with the rotational axis line of the rotary drum 3. One terminal of a connecting rod 18 is fixed to a base metal 17 and the permanent magnet 19 is fixed to the other terminal. The electromagnetic coil 20 which generates an electromagnetic force to the permanent magnet 19 is arranged fixedly on the rotary drum 3. When a current is flowed to the electromagnetic coil 20 through a rotary transformer 9, the electromagnetic force operates on the permanent magnet 19 and the head 8 moves in the direction of the rotational axis line of the rotary drum 3. This operation is utilized to slide the head 3 in the direction of the rotational axis line of the rotary drum 8, tracing the recording track accurately in case of the oscillation of the drum part 1 and vertical movement of a magnetic tape.

Description

【発明の詳細な説明】 この発明は、ビデオテープレコーダの回転ドラムに取付
けられるヘッドを駆動させるヘッド駆動Ｉｌ橋に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a head drive I1 bridge for driving a head attached to a rotating drum of a video tape recorder.

第１図は、従来のビデオテープレコーダのドラム部を示
す断面図である。図において、ドラム部１は、固定ドラ
ム２と回転ドラム３とから構成される。固定ドラム２内
には回転軸４がベアリング５を介して回転可能に支持さ
れている。回転軸４には第１のフランジ６が圧入されて
おり、この第１の７ランジ６に回転ドラム３が固定され
ている。FIG. 1 is a sectional view showing a drum section of a conventional video tape recorder. In the figure, a drum section 1 is composed of a fixed drum 2 and a rotating drum 3. A rotary shaft 4 is rotatably supported within the fixed drum 2 via a bearing 5. A first flange 6 is press-fitted into the rotating shaft 4, and the rotating drum 3 is fixed to the first flange 6.

したがって、回転ドラム３は固定ドラム２に対して回転
可能に支持されていることになる。Therefore, the rotating drum 3 is rotatably supported relative to the fixed drum 2.

また図示されるように、回転ドラム３の下部には、台金
７がたとえばねじ止めによって固定されており、この台
金７の先端部にヘッド８が固肴されている。ヘッド８か
らの再生信号は、回転軸４のまわりに配置されたロータ
リトランス９によって取出される。また、第２の７ラン
ジ１０を介してロータマグネット１１が回転軸４に取付
けられており、このロータマグネット１１を回転させる
ように電磁コイル１２が取付けられている。Further, as shown in the figure, a base metal 7 is fixed to the lower part of the rotating drum 3 by, for example, screws, and a head 8 is fixed to the tip of the base metal 7. A reproduction signal from the head 8 is extracted by a rotary transformer 9 arranged around the rotation shaft 4. Further, a rotor magnet 11 is attached to the rotating shaft 4 via the second seven flange 10, and an electromagnetic coil 12 is attached so as to rotate the rotor magnet 11.

以上のように構成されたドラム部を用いて第２図に示さ
れるデツキが構成される。磁気テープ１３はドラム部１
に斜めに巻き掛けられて走行する。The deck shown in FIG. 2 is constructed using the drum section constructed as described above. The magnetic tape 13 is the drum part 1
It travels by being wrapped diagonally around it.

したがって、第３図に示されるように、磁気テープ１３
には斜状に延びた記録トラック１４が記録されることに
なる。Therefore, as shown in FIG.
A diagonally extending recording track 14 is recorded on the recording track 14 .

上述されたような従来のビデオテープレコーダのドラム
部には以下に述べるような欠点があった。The drum section of the conventional video tape recorder as described above has the following drawbacks.

すなわち、従来のドラム部の構成は、ヘッドと、そのヘ
ッドを取付けている回転ドラムとが固く固定されている
ものであるので、ドラム部が振動したりテープが上下動
を起こしたりすると、磁気テープに形成される記録トラ
ックの直線性が阻害され、また再生時にヘッドが記録ト
ラックを正確に追跡することが回前となって画質が低下
する欠点があった。In other words, in the conventional structure of the drum unit, the head and the rotating drum to which the head is attached are firmly fixed, so if the drum unit vibrates or the tape moves up and down, the magnetic tape This has the disadvantage that the linearity of the recording track formed during playback is hindered, and the head is unable to accurately track the recording track during reproduction, resulting in a reduction in image quality.

この発明は、上述された欠点を解消するためになされた
ものであり、その主、たる目的は、ドラム部が振動した
りあるいはテープが上下動したりしても、ヘッドが記録
トラックを正確に追跡することができるヘッド駆動機構
を提供することである。This invention was made to eliminate the above-mentioned drawbacks, and its main purpose is to ensure that the head accurately tracks the recording track even if the drum section vibrates or the tape moves up and down. It is an object of the present invention to provide a head drive mechanism that can be tracked.

この発明は、要約すれば、ヘッドが、回転ドラ、ムに対
してその回転軸線と同方向に移動可能となるように取付
けられており、さらに永久磁石と電磁コイルとを利用し
てヘッドが記録トラックを正確に追跡゛できるようにし
たヘッド駆動１ｌｌＩＩＩＩである。In summary, the present invention is such that a head is attached to a rotating drum so as to be movable in the same direction as its rotational axis, and furthermore, a permanent magnet and an electromagnetic coil are used to enable the head to record data. It is a head drive 1llIII that enables accurate tracking of the track.

この発明の上述の目的およびその他の目的と特徴は、図
面を参照して行なう以下の詳細な説明から一層明らかと
なろう。The above objects and other objects and features of the present invention will become more apparent from the following detailed description with reference to the drawings.

第４図は、この発明に従ったヘッド駆動機構を備えるド
ラム部を示す部分断面図である。第１図に示された従来
のドラム部との相違点は、ヘッド８の取付は構造にある
。すなわち、ヘッド８は、回転ドラム３に対してその回
転軸線と同方向に移動可能となるように取付けられてい
る。その取付は方の−・例が第４図に示されるのである
が、具体的には以下の構成となっている。すなわち、回
転ドラム３には、回転ドラム３の回転軸線と交差する方
向に延びる弾性部材１５の一端が、たとえばねじ（図示
せず）によって固定される。弾性部材１５の他端にはヘ
ッド８が固定され、したがってこのヘッド８は回転ドラ
ム３に対してその回転軸線ど同方向に移動可能となる。FIG. 4 is a partial cross-sectional view showing a drum portion including a head drive mechanism according to the present invention. The difference from the conventional drum section shown in FIG. 1 lies in the mounting structure of the head 8. That is, the head 8 is attached to the rotating drum 3 so as to be movable in the same direction as its rotational axis. An example of its installation is shown in FIG. 4, and the concrete structure is as follows. That is, one end of an elastic member 15 extending in a direction intersecting the rotational axis of the rotating drum 3 is fixed to the rotating drum 3 by, for example, a screw (not shown). A head 8 is fixed to the other end of the elastic member 15, so that the head 8 is movable relative to the rotating drum 3 in the same direction as its axis of rotation.

弾性部材１５は、好ましくは弾性体１６と台金１７とか
ら構成される。この場合、弾性体１６の一端が回転ドラ
ム３に固定され、弾性体゛１６の他端に台金１７の一端
が固定される。そして、台金１７の他端にはヘッド８が
固定される。The elastic member 15 preferably includes an elastic body 16 and a base metal 17. In this case, one end of the elastic body 16 is fixed to the rotating drum 3, and one end of the base metal 17 is fixed to the other end of the elastic body 16. A head 8 is fixed to the other end of the base metal 17.

また、図示されるように、回転ドラム３内をその回転軸
線と同方向に摺動可能とされた連接棒１８が配置されて
いる。連接棒１８の一方端はヘッド８を保持する。具体
的には、連接棒１８の一方端は弾性部材１５または台金
１７に固定される。Further, as shown in the figure, a connecting rod 18 is arranged so as to be able to slide within the rotating drum 3 in the same direction as the axis of rotation thereof. One end of the connecting rod 18 holds the head 8. Specifically, one end of the connecting rod 18 is fixed to the elastic member 15 or the base metal 17.

そして、連接棒１８の他方端には永久磁石１９が固定さ
れている。回転ドラム３には、この永久磁石１９に電磁
力を発生させるための電磁コイル２０が固定して配置さ
れる。A permanent magnet 19 is fixed to the other end of the connecting rod 18. An electromagnetic coil 20 for generating electromagnetic force in the permanent magnet 19 is fixedly arranged on the rotating drum 3.

以上のような構成のヘッド駆動機構が、ヘッドを記録ト
ラックに追跡させる動作について以下説明する。The operation of the head drive mechanism configured as described above to cause the head to follow the recording track will be described below.

上述された構成から明らかなように、ロータリトランス
９を介して電磁コイル２０に電流を流すと永久磁石１９
に電磁力が作用する。そして、ヘッド８は回転ドラム３
に対してその回転軸線と同方向に移動可能に取付けられ
ているので、その電磁力によって回転ドラムの回転軸線
方向に移動する。この作用を利用すると、ドラム部１が
振動したりあるいは磁気テープが上下に動いたりする状
態でも、ヘッドを回転ドラムの回転軸線方向に摺動させ
て正確に記録トラックを追跡させることができる。した
がって、再生画質が向上する。As is clear from the above-described configuration, when a current is passed through the electromagnetic coil 20 via the rotary transformer 9, the permanent magnet 19
An electromagnetic force acts on the The head 8 is connected to the rotating drum 3.
Since it is movable in the same direction as the rotational axis of the rotating drum, the electromagnetic force causes the drum to move in the direction of the rotational axis of the rotating drum. By utilizing this effect, even when the drum section 1 vibrates or the magnetic tape moves up and down, the head can be slid in the direction of the rotational axis of the rotating drum to accurately track the recording track. Therefore, the reproduced image quality is improved.

より具体的に言うならば、ドラム部１が振動したりある
いは磁気テープが上下に動いたりしてヘッド８が記録ト
ラックから太き（外れるど再生信号の出力レベルが低下
する。したがって、これを電気的に検知し、出力レベル
の低下に応じた電流を電磁コイル２０に流してヘッド８
を記録トラックに沿うように制御することによって、ヘ
ッド８を記録トラックに正確に沿わせて摺動させること
ができる。More specifically, if the drum section 1 vibrates or the magnetic tape moves up and down, the head 8 becomes thicker (deviates from the recording track), and the output level of the reproduced signal decreases. The head 8
By controlling the head 8 so that it follows the recording track, the head 8 can be slid accurately along the recording track.

以上のように、この発明によれ、ば、ヘッドを回転ドラ
ムに対してその回転軸線と同方向に移動可能となるよう
に取付け、さらに永久磁石と電磁コイルとを利用してヘ
ッドを回転ドラムの回転軸線と同方向に摺動させるもの
であるので、ヘッドを記録トラックに正確に追跡させる
ことができ、その結果再生画質を大幅に向上させること
ができる。As described above, according to the present invention, the head is attached to the rotating drum so as to be movable in the same direction as the axis of rotation thereof, and the head is moved to the rotating drum using a permanent magnet and an electromagnetic coil. Since the head is slid in the same direction as the rotation axis, the head can be accurately tracked to the recording track, and as a result, the reproduced image quality can be greatly improved.

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

第１図は、従来のビデオテープレコーダのドラム部を示
す断面図である。第２図は、ドラム部を組み込んだデツ
キを示す斜視図である。第３図は磁気テープを示す正面
図であり、記録トラックがいかに形成されているかを示
している。第４図は、この発明に従ったヘッド駆動ａＩ
Ｓを備えるドラム部を示す部分断面図である。 図において、１はドラム部、３は回転ドラム、８はヘッ
ド、１５は弾性部材、１６は弾性体、１７は台金、１８
は連接棒、１９は永久磁石、２０は電ａｌ！コイルを示
す。FIG. 1 is a sectional view showing a drum section of a conventional video tape recorder. FIG. 2 is a perspective view showing the deck incorporating the drum section. FIG. 3 is a front view of the magnetic tape, showing how recording tracks are formed. FIG. 4 shows a head drive aI according to the present invention.
It is a partial sectional view showing a drum part provided with S. In the figure, 1 is a drum part, 3 is a rotating drum, 8 is a head, 15 is an elastic member, 16 is an elastic body, 17 is a base metal, 18
is a connecting rod, 19 is a permanent magnet, and 20 is an electric Al! The coil is shown.

Claims (3)

【特許請求の範囲】[Claims] （１）　ビデオテープレコーダの回転ドラムに取付けら
れるヘッドを駆動させるヘッド駆動機構であって、 前記ヘッドは、前記回転ドラムにＭしてその回転軸線と
同方向に移動可能となるように取付けられており、 前記回転ドラム内をその回転軸線と同方向に摺動可能と
された連接棒が配置されており、前記連接棒の一方端は
前記ヘッドを保持し、前記連接棒の他方端には永久磁石
が固定されており、前記回転ドラムには、前記永久磁石
に電磁力゛を発生させるための電磁コイルが固定して配
置される、ヘッド駆動機構。(1) A head drive mechanism for driving a head attached to a rotating drum of a video tape recorder, the head being attached to the rotating drum so as to be movable in the same direction as its rotational axis. A connecting rod is disposed that is slidable within the rotating drum in the same direction as its axis of rotation, one end of the connecting rod holds the head, and the other end of the connecting rod holds the head. A head drive mechanism, wherein a magnet is fixed, and an electromagnetic coil for generating an electromagnetic force in the permanent magnet is fixedly disposed on the rotating drum. （２）　前記回転ドラムには、前記回転ドラムの回転軸
線と交差する方向に延びる弾性部材の一端が固定され、 前記ヘッドは前記弾性部材の他端に固定されており、し
たがって前記ヘッドは前記回転ドラムに対してその回転
軸線と同方向に移動可能となる、特許請求の範囲第１項
記載のヘッド駆動機構。(2) One end of an elastic member extending in a direction intersecting the rotational axis of the rotating drum is fixed to the rotating drum, and the head is fixed to the other end of the elastic member, so that the head is fixed to the rotating drum. The head drive mechanism according to claim 1, which is movable relative to the drum in the same direction as its rotation axis. （３）　前記弾性部材は、弾性体と台金とから構成され
ており、 前記弾性体の一端は前記回転ドラムに固定され、前記弾
性体の他端には前記台金の一端が固定され、前記台金の
他端には前記ヘッドが固定されるものであり、 前記連接棒の一方端は前記台金に固定される、特許請求
の範囲第２項記載のヘッド駆動機構。(3) The elastic member is composed of an elastic body and a base metal, one end of the elastic body is fixed to the rotating drum, and one end of the base metal is fixed to the other end of the elastic body, The head drive mechanism according to claim 2, wherein the head is fixed to the other end of the base metal, and one end of the connecting rod is fixed to the base metal.
JP3526883A 1983-03-02 1983-03-02 Head driving mechanism Pending JPS59160823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3526883A JPS59160823A (en) 1983-03-02 1983-03-02 Head driving mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3526883A JPS59160823A (en) 1983-03-02 1983-03-02 Head driving mechanism

Publications (1)

Publication Number Publication Date
JPS59160823A true JPS59160823A (en) 1984-09-11

Family

ID=12437046

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3526883A Pending JPS59160823A (en) 1983-03-02 1983-03-02 Head driving mechanism

Country Status (1)

Country Link
JP (1) JPS59160823A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410804A2 (en) * 1989-07-28 1991-01-30 Kabushiki Kaisha Toshiba Rotary head device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410804A2 (en) * 1989-07-28 1991-01-30 Kabushiki Kaisha Toshiba Rotary head device

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