JPS63173219A - Magnetic head carrying device - Google Patents
Magnetic head carrying deviceInfo
- Publication number
- JPS63173219A JPS63173219A JP371587A JP371587A JPS63173219A JP S63173219 A JPS63173219 A JP S63173219A JP 371587 A JP371587 A JP 371587A JP 371587 A JP371587 A JP 371587A JP S63173219 A JPS63173219 A JP S63173219A
- Authority
- JP
- Japan
- Prior art keywords
- coil bobbin
- head
- magnetic
- magnetic head
- cylindrical coil
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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〕
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）にトし、特にＶＴＲの再生画質を改讐するた
めにビデオΦヘッドを磁気テープ幅方向に移動可能に装
着する装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to, for example, a video tape recorder (hereinafter referred to as VT).
The present invention relates to an apparatus in which a video Φ head is movably mounted in the width direction of a magnetic tape in order to improve the reproduction image quality of a VTR.
第５図は従来の磁気ヘッド担持装置を示す斜視図であり
、図において、（４）は実質的に剛性の板からなるヘッ
ド台、（５）はヘッド台（局の、先端に固着して担持さ
れたヘッドである。かかる磁気ヘッド担持装置は第６図
に示す如く回転ドラム装置の回転する一ヒトラムにネジ
等により固定して取り付けられる。FIG. 5 is a perspective view showing a conventional magnetic head holding device. In the figure, (4) is a head stand made of a substantially rigid plate, and (5) is a head stand (fixed to the tip of the head). This magnetic head carrying device is fixedly attached to a rotating drum of a rotating drum device with screws or the like, as shown in FIG.
第６図は第５図に示した従来の磁気ヘッド担持装置を備
えた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、（りは固定の下ドラム、（■は回転す
る上ドラム、（→は上ドラム（３）に着脱自在にネジ止
めされたヘッド台、（■はヘッド台（４の先端に固着さ
れたヘッド、（１３）は磁気テープである。FIG. 6 is a sectional view showing a rotating drum device equipped with the conventional magnetic head holding device shown in FIG.
(1) is the rotating shaft, (ri is the fixed lower drum, (■ is the rotating upper drum, (→ is the head stand that is removably screwed to the upper drum (3), (■ is the head stand (4) The head (13) fixed to the tip is a magnetic tape.
ヘッド（句は上ドラム（３）に対して固定した位置にあ
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（町は一定の高速度で回転せしめられて
いる。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。The head is in a fixed position relative to the upper drum (3), and its tip protrudes slightly from the outer periphery of the upper drum (3).The upper drum is rotated at a constant high speed. A magnetic tape (13) is wound slightly diagonally around the outer peripheral surfaces of the upper drum (3) and the lower drum (2) and runs at a predetermined speed.
かくしてヘッド（５）は磁気テープ（１３）に接触して
磁気的に鋏像（または音声）信号を記録または再生する
。The head (5) thus contacts the magnetic tape (13) to magnetically record or reproduce the scissor image (or audio) signal.
磁気テープ（１３）の走行とヘッド（５）の回転により
ヘッド（５）は磁気テープを斜めに横切る。By running the magnetic tape (13) and rotating the head (5), the head (5) diagonally traverses the magnetic tape.
これら横切り線は相互に平行になっている。第７図はこ
のことを詳細に説明するための図である。図において、
（１３ａ）は磁気テープ（１３）の軌跡、（Ｖｌ）は磁
気テープ（１３）の通常の送り速度、（５ａ）はヘッド
（５）の軌跡、（Ｔｏ）はヘッド（ωの回転速度である
。軌跡（１３ａ）と軌跡（５ａ）とは図示の如く交差し
ている。These transverse lines are parallel to each other. FIG. 7 is a diagram for explaining this in detail. In the figure,
(13a) is the trajectory of the magnetic tape (13), (Vl) is the normal feeding speed of the magnetic tape (13), (5a) is the trajectory of the head (5), and (To) is the rotational speed of the head (ω). The locus (13a) and the locus (5a) intersect as shown.
かくしてヘッド（５により磁気テープ（１３）に画かれ
る相対的軌跡（前記横切り糾）は第７図（−に示す如く
人となる。ところで、磁気テープ（１３）の送り速度が
■１からｖ２の如く増大せしめられる（例えば早や送り
操作時）と、磁気テープ（１３）に対するヘッド（５の
相対的軌跡は第７図（ｂ）に示す如くＢとなる。この場
合ヘッド（９は通常時の相対的軌跡（Ａ）すなわち記録
跡を正確に追跡せず、はずれるようになる。はずれて来
るとヘッド（９が拾う信号レベルは低くなり、鮮明な再
生画像を得ることが困難になりノイズが発生して来る。In this way, the relative locus (the above-mentioned cross-cutting) drawn on the magnetic tape (13) by the head (5) becomes a person as shown in FIG. (for example, during a fast forwarding operation), the relative trajectory of the head (5) with respect to the magnetic tape (13) becomes B as shown in FIG. The relative trajectory (A), that is, the recorded trace, is not accurately tracked and begins to deviate.When it deviates, the signal level picked up by the head (9) becomes low, making it difficult to obtain a clear reproduced image and generating noise. I'll come.
このため、通常時の送り速度（Ｖｔ）の下で記録した磁
気テープ上の記録跡すなわち相対的記録跡（蜀に対して
、再生時の磁気テープの送り速度を任意に変化させた場
合でも、ヘッド（９が前記記録跡を正確に追跡するよう
にヘッド（Ｓがテープ幅方向（（ロ）に可動であるよう
にするとよい。For this reason, even if the magnetic tape feeding speed during playback is arbitrarily changed, the recording traces, or relative recording traces, on the magnetic tape recorded under the normal feeding speed (Vt) It is preferable that the head (S) is movable in the tape width direction ((b)) so that the head (9) accurately tracks the recording trace.
ヘッド（５）がテープ幅方向（切に可動であるように上
ドラム（Ｊに装着されていると、何等かの動作装置でヘ
ッド（０のテープ幅方向の移動を制御してやれば、相対
的軌跡（Ｃ）にすることが出来る。If the head (5) is mounted on the upper drum (J) so that it is movable in the tape width direction, if the movement of the head (0) in the tape width direction is controlled by some operating device, the relative trajectory will be (C) can be made.
ところが、従来の磁気へラド担持装置は回転ドラムにヘ
ッド（団を固定した形で単に取り付けられているため、
磁気テープの記録跡を、テープ速度の不安定や変速再生
などに対しても十分な精度でヘッド（ωがなぞれ得るよ
うにはなしえないのである。However, conventional magnetic helad carrier devices are simply attached to a rotating drum with a fixed head.
It is not possible to trace the recording traces of a magnetic tape with sufficient accuracy to the head (ω) even in the case of unstable tape speed or variable speed playback.
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、ヘッドがテープ幅方向に移動できるようにな
した磁気ヘッド担持装置を得ることを目的とし、かつ加
工など生産性が良く、取付、組立の容易な磁気ヘッド担
持装置を得ることを目的とする。This invention was made to solve the above-mentioned problems, and aims to provide a magnetic head holding device in which the head can move in the width direction of the tape, and which has good productivity such as processing. The object of the present invention is to obtain a magnetic head holding device that is easy to install and assemble.
この発明に係る磁気ヘッド担持装置は円弧状スロットを
有する円弧状中間部を少なくとも一重備えてトランポリ
ン動作する両端支持ノくネ機構の板バネを二組具備する
と共に、これら板ノくネの中心部であるコイルボビン取
付部をコイルボビンで連結し、これら板バネの円形外周
部を磁気発生器の一部であるヨークに取り付けてヘッド
の平行移動機構を構成したバネ板構造のものである。The magnetic head supporting device according to the present invention is provided with two sets of plate springs having at least one circular arc-shaped intermediate portion having an arc-shaped slot and having a both-end support hook mechanism that operates as a trampoline. It has a spring plate structure in which the coil bobbin mounting portions are connected by a coil bobbin, and the circular outer peripheral portions of these plate springs are attached to a yoke that is a part of the magnetic generator to constitute a parallel movement mechanism for the head.
この発明における磁気ヘッド担持装置は、板バネはトラ
ンポリン動作するように円弧状中間部を備えた形の機構
故にヘッドを傾けることなく上下に移動させることが出
来る。コイルボビン取付部でコイルと板バネを一体化す
るのでバネ中心と磁気中心とを合わせやすい。円筒コイ
ルボビンは軽くて強く、板バネは板構造のためコイル軸
方向にはｌ＆感で回転方向には変形しにくいものを容易
に作ることが出来る。円形外周部が磁気発生器のヨーク
に取り付けられるため磁気ヘッド担持装置全体の取付ネ
ジ穴とヘッドの位置関係を正確に合わせられる。In the magnetic head holding device according to the present invention, the leaf spring can move the head up and down without tilting because the leaf spring has an arcuate intermediate portion so as to act as a trampoline. Since the coil and leaf spring are integrated at the coil bobbin attachment part, it is easy to align the spring center with the magnetic center. The cylindrical coil bobbin is light and strong, and since the leaf spring has a plate structure, it is possible to easily create a coil that has a l& shape in the axial direction and is difficult to deform in the rotational direction. Since the circular outer peripheral portion is attached to the yoke of the magnetic generator, the positional relationship between the mounting screw holes of the entire magnetic head carrying device and the head can be precisely aligned.
以下、この発明の一実施例を図について説明する。第１
図はこの発明の磁気ヘッド担持装置を備えた回転ドラム
装置を示す断面図、第２図はこの発明の一実施例の磁気
ヘッド担持装置の断面図である。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、（４ａ）はヘッド（Ｑを担持する磁気ヘッド担持
装置、（６）はブアリング、（′７）は上トランス、（
８）は下トランス、（９）は台座、（１０）は接続部、
（１１）は配線板、（１３）は磁気テープ、（１４）は
駆動用制御信号を外部より与えるための接融子、（１５
）は接触子（１４）と接触し回転する電極、（１６）は
′磁極（１５）と磁気ヘッド担持装置（４ａ）を電気的
に結ぶ接続部である。これらにより制御信号が磁気ヘッ
ド担持装置へ伝えられる。An embodiment of the present invention will be described below with reference to the drawings. 1st
FIG. 2 is a sectional view showing a rotating drum device equipped with a magnetic head supporting device of the present invention, and FIG. 2 is a sectional view of a magnetic head supporting device according to an embodiment of the present invention. In the figure, (1) is the rotating shaft, (2) is the fixed lower drum, (3) is the rotating upper drum, (4a) is the magnetic head support device that supports the head (Q), (6) is the bore ring, (' 7) is the upper transformer, (
8) is the lower transformer, (9) is the pedestal, (10) is the connection part,
(11) is a wiring board, (13) is a magnetic tape, (14) is a welder for externally applying drive control signals, (15)
) is an electrode that rotates in contact with the contactor (14), and (16) is a connecting portion that electrically connects the magnetic pole (15) and the magnetic head carrying device (4a). Control signals are transmitted to the magnetic head carrying device by these.
第２図（ａ）〜（ｃ）を参照して、（４１）、（４２）
は磁気ヘッド担持装置（４ａ）の一部を構成する上下２
枚の平行なトランポリン動作の板バネ、（４Ｃ）は２枚
の板バネ（４１）、（４２）に固着保持された円筒コイ
ルボビン、（４ｄ）は円筒コイルボビン（４ｃ）に巻か
れた円筒形コイル、（４ｆ）は円柱形永久磁石、（４ｅ
）はヨーク、ヨーク（４ｅ）と磁石（４ｆ）を総称し磁
気発生器と呼ぶ。すなわちヨーク（４ｅ）は磁石（４ｆ
）との間で環状ギャップ（４ｇ）を榊成しそこを通る磁
束（Ｄ）を生ぜしめている。With reference to FIGS. 2(a) to (c), (41), (42)
are upper and lower parts 2 forming part of the magnetic head holding device (4a).
(4C) is a cylindrical coil bobbin fixedly held by two leaf springs (41) and (42), (4d) is a cylindrical coil wound around the cylindrical coil bobbin (4c). , (4f) is a cylindrical permanent magnet, (4e
) collectively refers to the yoke, yoke (4e), and magnet (4f) as a magnetic generator. In other words, the yoke (4e) is connected to the magnet (4f
), an annular gap (4g) is formed between the two, and a magnetic flux (D) is generated passing through the annular gap (4g).
（４１ｅ）は下方の板バネ（４１）の１部であってヘッ
ド（５）を取り付けるためのヘッド取付部である。なお
第２図（ｂ）は第２図（ａ）の概略底面図であり、第２
図（０）はその左側面図である。(41e) is a part of the lower leaf spring (41) and is a head attachment portion for attaching the head (5). Note that FIG. 2(b) is a schematic bottom view of FIG. 2(a), and the second
Figure (0) is its left side view.
第３図について、トランポリン動作の板バネ（４１）、
（４２）の詳細を説明する。第３図（ａ）は板バネ（４
１）を示し、コイルボビン取付部（４１ａ）と円弧状中
間部（４１ｂ）と円形外周部（４１ｃ）とからなる。コ
イルボビン取付部（４１ａ）からヘッド取付部（４１ｅ
）が延びている。円弧状中間部（４１ｂ）には円弧状の
スロットが設けられており、半径方向（へ）に接続手を
備えている。かかる円弧状中間部（４１ｂ）がコイルボ
ビン取付部（４１ａ）と円形外周部（４１ｃ）との間に
対称的に少なくとも一重配置すれ、その接続手によりコ
イルボビン取付部（４１ａ）と円形外周部（４１ｃ）と
を連結している。図示の場合円弧状中間部は一重半在り
、最外方の半分の円弧状中間部はその両端で円形外周部
（４１Ｃ）に連結されている。円形外周部（４１ｃ）は
外周の一部に回転方向につき位置決めする切欠（４１ｃ
ｌ）を有する。この切欠（４１ｄ）は板バネ（４１）の
円形外周Ｒ（Ｓ （４１ｃ）がヨーク（４ｅ）に取り付
けられるときヨーク内壁の凸部（図示省略）に嵌合して
ヘッド取付部（４１ｅ）がヨーク（４ｅ）より正確に突
き出すように構成している。第３図（ｂ）は敬バネ（４
２）を示し、コイルボビン取付ｓ （４２ａ ）、円弧
状中間部（４２ｂ）、円形外周部（４２ａ）、および切
欠（４２ｄ）を有する点で前記板バネ（４１）と同じで
あるが、異なる点はこの板バネ（４２）はヘッド取付部
（４１ｓ）を有しないこと、および円弧状中間部（４２
ｂ）の接続手が半径方向（ハ）に対して９０°ずれた半
径方向（ト）に在るように配置されていることである。Regarding FIG. 3, a leaf spring (41) for trampoline operation,
(42) will be explained in detail. Figure 3(a) shows a leaf spring (4
1), which consists of a coil bobbin attachment part (41a), an arcuate intermediate part (41b), and a circular outer peripheral part (41c). From the coil bobbin mounting part (41a) to the head mounting part (41e)
) is extended. The arc-shaped intermediate portion (41b) is provided with an arc-shaped slot and provided with a connecting arm in the radial direction. At least one arcuate intermediate portion (41b) is arranged symmetrically between the coil bobbin attachment portion (41a) and the circular outer circumference portion (41c), and the connecting portion connects the coil bobbin attachment portion (41a) and the circular outer circumference portion (41c). ) are connected. In the illustrated case, there is one and a half arcuate intermediate portions, and the outermost half of the arcuate intermediate portion is connected to the circular outer peripheral portion (41C) at both ends thereof. The circular outer periphery (41c) has a notch (41c) in a part of the outer periphery for positioning in the rotational direction.
l). When the circular outer periphery R(S (41c) of the leaf spring (41) is attached to the yoke (4e), this notch (41d) fits into a convex part (not shown) on the inner wall of the yoke, and the head attachment part (41e) It is constructed so that it protrudes more accurately than the yoke (4e). Figure 3 (b) shows the spring (4e).
2), and is the same as the leaf spring (41) in that it has a coil bobbin attachment s (42a), an arcuate middle part (42b), a circular outer peripheral part (42a), and a notch (42d), but it is different. This leaf spring (42) does not have a head attachment part (41s), and has an arcuate intermediate part (42).
The connection point b) is arranged so as to be in the radial direction (g), which is shifted by 90° from the radial direction (c).
かかル構成によりコイルボビン（４ｃ）は上下方向のみ
に移動自在に保持され、板バネはトランポリン動作する
。Due to the heel structure, the coil bobbin (4c) is held movably only in the vertical direction, and the leaf spring performs a trampoline action.
コイル（４ｄ）に電流を流すと第３図（Ｑ）および第３
図（ｄ）に示す如く力（Ｆ）が発生し、板バネ（４１）
、（４２）は点線で示す如くすり鉢状に変形する。When a current is passed through the coil (4d), Fig. 3 (Q) and 3.
As shown in figure (d), a force (F) is generated and the leaf spring (41)
, (42) is deformed into a mortar shape as shown by the dotted line.
第３図（ｅ）を参照して外力（Ｙ）に対して（強度）α
（曲げ方向寸法）３×（曲げと直角方向寸法）の関係か
ら二つの寸法を決めれば力（Ｆ）には敏感で（■および
（力方向には変形しにくいものを容易に得られる。外力
（Ｚ）は上下二枚の板バネをコイルボビン（４Ｃ）で連
結固着することにより主に外力（Ｙ）に依存する強度を
持ち、方向（ト）にのみ敏感に平行移動出来る。接続手
の方向（ハ）、（ト）は直角の関係を示したが回転方向
に角度をもたなければ外力（Ｚ）を代表とする回転力に
より主に外力（力と００とに依存した強度となり組み合
わせ角度により円弧状中間部（４１ｂ）、（４２ｂ）を
同一形状にした上下２枚の板バネで外力方向に対応した
強度をもたすことも可能である。もちろん９０°が外力
に対し無方向性の均一強度をもたせられ好ましい。以上
に因りヘッド（■は平行移動し記録跡に正確な軌跡〔第
７図（０）のＣ〕をトレース出来てノイズのない再生画
が得られる。(Strength) α for external force (Y) with reference to Figure 3 (e)
By determining two dimensions from the relationship of (bending direction dimension) 3 x (bending and perpendicular dimension), it is easy to obtain a product that is sensitive to force (F) (■) and (hard to deform in the force direction.External force (Z) has strength that depends mainly on external force (Y) by connecting and fixing two upper and lower leaf springs with a coil bobbin (4C), and can sensitively move in parallel only in the direction (G).Direction of the connecting hand (C) and (G) show a right-angled relationship, but if there is no angle in the rotation direction, the rotational force represented by the external force (Z) will cause the strength to mainly depend on the external force (force and 00), and the combination angle Therefore, it is also possible to provide strength corresponding to the direction of external force using two upper and lower leaf springs whose arcuate middle parts (41b) and (42b) have the same shape.Of course, 90° is non-directional with respect to external force. As a result, the head (■) moves in parallel and can trace an accurate trajectory to the recording trace [C in FIG. 7 (0)], thereby obtaining a reproduced image without noise.
第４図は上下二枚の板バネがコイル（４ｄ）を挾む形に
配置した例を示し、板バネとコイル間の軸方向距離が小
さく出来るためより正確に平行移動出来ると共に磁気発
生器の必要空間中に板バネを設置出来るため、より小形
となる。Figure 4 shows an example in which two upper and lower leaf springs are arranged to sandwich a coil (4d).Since the axial distance between the leaf spring and the coil can be reduced, more accurate parallel movement is possible, and the magnetic generator Since the leaf spring can be installed in the required space, it becomes more compact.
なお上記実施例では板バネを円板から均一スロットによ
り切り出したものを示したがスロットは任意の溝幅でも
良い。In the above embodiments, the leaf spring is cut out from a disk with uniform slots, but the slots may have any groove width.
回り止め嵌合部を構成する切欠（４１（１）。A notch (41(1)) that constitutes a rotation-preventing fitting part.
（４２ｄ）は板バネの接続手の方向（へ）、（ト）より
９０°ずらして示したが円形外周ｍ （４１ａ ） 。(42d) is shown in the direction (toward) of the connecting arm of the leaf spring, shifted by 90° from (g), and has a circular outer circumference m (41a).
（４２０）のどこに設けてもよい。(420) may be provided anywhere.
板バネは平行ならばコイルボビンの軸上のどこに設けて
も良く、特に第４図に示す如くのコイルを挾む配置はよ
り一層の小形化が可能であり好ましい。The leaf springs may be provided anywhere on the axis of the coil bobbin as long as they are parallel. In particular, an arrangement in which the coil is sandwiched as shown in FIG. 4 is preferable because further miniaturization is possible.
第３図（ａ）、 （ｂ）に示す円弧状中間部（４ｌ ｂ
）。The arcuate middle part (4l b
).
（４２ｂ）は−重半になされているが二重でも三重でも
あるいは一重でも、更にその他の形でもよい。Although (42b) is made into a half-fold shape, it may be double, triple, single, or other shapes.
上下の円弧状中間部（４１ｂ）、（４２ｂ）が回転方向
に９０°の角度をずらされたのを示したがそれ以外でも
良い。Although the upper and lower arcuate intermediate portions (41b) and (42b) are shown to be shifted by 90° in the rotational direction, other arrangements may be made.
磁気発生器はコの字形のものを示したが環状ギャップが
あればよくこの形に限定するものではない。Although the magnetic generator is shown as having a U-shape, it is not limited to this shape as long as it has an annular gap.
以上のように、この発明によればトランポリン動作の板
バネを上下２枚平行に配置し円筒コイルボビンにより連
結固着し平行移動出来にしたから磁気ヘッド担持装置が
小形で安価にでき、また精度の高いものが得られる効果
がある。As described above, according to the present invention, two leaf springs for trampoline action are arranged in parallel, upper and lower, and are connected and fixed by a cylindrical coil bobbin so that they can be moved in parallel. Therefore, the magnetic head holding device can be made small and inexpensive, and it can also be made with high accuracy. It has the effect of getting something.
第１図はこの発明の一実施例による磁気ヘッド担持装置
を備えた回転ドラム装置を示す断面図、第２１Ｊ（ａ）
はこの発明の一実施例の磁気ヘッド担持装置の詳細を示
す断面図、第２図（ｂ）はその底面図、第２図（０）は
その側面図、第３図（樽ヘッドが取り付けられる板バネ
の平面図、第３図（ｂ）は他方の板バネの平面図、第３
図（Ｃ）および第３図（ｄ）は板バネのトランポリン動
作を説明するための図、第３図（ｅ）は板バネに対する
種々な外力を示す図、第４図は板／ｊネの他の配置の実
施例を示す磁気ヘッド担持装置の断面図、第５図は従来
のヘッド担持装置を示す斜視図、第６図は従来の磁気ヘ
ッド担持装置を有した回転ドラムの断面図、第７図（荀
乃至第７図（Ｃ）はＶＴＲにおけるテープとヘッドの相
対的記録跡を説明するための図である。
図において、（２）は上ドラム、（４ａ）は磁気ヘッド
担持装置、（４１）、（４２）はトランポリン動作の板
バネ、（句はヘッド、（４ｅ）はヨーク、（４ｆ）は永
久磁石、（４ｄ）はコイルである。
なお、各図中同一符号は同一または相当部分を示す。
代理人 弁理士 大 岩 増 雄第１図
１６番琥忰
第 ２ 閲
（Ｃ） （ｂ）ｅ
窮３図
第７図FIG. 1 is a sectional view showing a rotating drum device equipped with a magnetic head supporting device according to an embodiment of the present invention, No. 21J(a).
2(b) is a bottom view, FIG. 2(0) is a side view, and FIG. A plan view of the leaf spring, FIG. 3(b) is a plan view of the other leaf spring, FIG.
Figures (C) and 3 (d) are diagrams for explaining the trampoline operation of the leaf spring, Figure 3 (e) is a diagram showing various external forces on the leaf spring, and Figure 4 is a diagram for explaining the trampoline operation of the leaf spring. 5 is a perspective view showing a conventional head supporting device; FIG. 6 is a sectional view of a rotary drum having a conventional magnetic head supporting device; FIG. Figure 7 (Xu to Figure 7 (C) is a diagram for explaining the relative recording traces between the tape and the head in a VTR. In the figure, (2) is the upper drum, (4a) is the magnetic head carrying device, (41) and (42) are the leaf springs for trampoline operation, (the phrase is the head, (4e) is the yoke, (4f) is the permanent magnet, and (4d) is the coil. In addition, the same symbols in each figure are the same or The corresponding part is shown. Agent: Masuo Oiwa, Patent Attorney Figure 1, No. 16, No. 2 (C) (b)e, Figure 3, Figure 7
Claims (5)
少なくとも一重の円弧状中間部とからなるトランポリン
動作の円形板バネの一対と、円筒形コイルと、ヨークと
永久磁石とからなりこれらの間に環状ギャップを有した
磁気発生器とを具備し、前記円形板バネの一方にはコイ
ルボビン取付部と強固に一体化したヘッド取付部を設け
、他方には設けず、これら円形板バネは平行に一定の間
隔をあけるが、両者の円弧状中間部については上下に整
合し合わない関係に回転方向に角度をずらせて配置し、
両者のコイルボビン取付部に円筒コイルボビンを固着保
持せしめ、この円筒コイルボビンに円筒形コイルを固着
し、この円筒形コイルおよび円筒コイルボビンを磁気発
生器の環状ギャップに配置し、前記の一対の円形板バネ
の円形外周部が磁気発生器を介して回転ドラムに取り付
けられることを特徴とする磁気ヘッド担持装置。(1) A pair of trampoline-operating circular leaf springs consisting of a coil bobbin attachment part, a circular outer circumferential part, and at least a single arcuate intermediate part connecting them, a cylindrical coil, a yoke, and a permanent magnet, and between these. a magnetic generator having an annular gap, one of the circular leaf springs is provided with a head mounting part that is firmly integrated with the coil bobbin mounting part, and the other is not provided, and these circular leaf springs are fixed in parallel. , but the arcuate intermediate portions of the two are arranged at different angles in the rotational direction so that they do not align vertically.
A cylindrical coil bobbin is fixedly held in both coil bobbin attachment parts, a cylindrical coil is fixed to the cylindrical coil bobbin, and the cylindrical coil and cylindrical coil bobbin are arranged in the annular gap of the magnetic generator. A magnetic head carrying device characterized in that a circular outer peripheral portion is attached to a rotating drum via a magnetic generator.
置した特許請求の範囲第１項記載の磁気ヘッド担持装置
。(2) The magnetic head supporting device according to claim 1, wherein the two circular plate springs are arranged to sandwich the cylindrical coil.
合して回転方向の位置決めを行なう特許請求の範囲第１
項記載の磁気ヘッド担持装置。(3) Claim 1, in which the circular outer peripheral portion of the circular leaf spring fits into a part of the magnetic generator to perform positioning in the rotational direction.
The magnetic head supporting device described in 1.
状中間部を一重半設けた特許請求の範囲第１項記載の磁
気ヘッド担持装置。(4) The magnetic head supporting device according to claim 1, further comprising one and a half arcuate intermediate portions connecting the coil bobbin mounting portion and the circular outer peripheral portion.
ずらせて配置した特許請求の範囲第１項記載の磁気ヘッ
ド担持装置。(5) The magnetic head supporting device according to claim 1, wherein the upper and lower arcuate intermediate portions are arranged at an angle of 90° in the rotational direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP371587A JPS63173219A (en) | 1987-01-10 | 1987-01-10 | Magnetic head carrying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP371587A JPS63173219A (en) | 1987-01-10 | 1987-01-10 | Magnetic head carrying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63173219A true JPS63173219A (en) | 1988-07-16 |
Family
ID=11565013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP371587A Pending JPS63173219A (en) | 1987-01-10 | 1987-01-10 | Magnetic head carrying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63173219A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02126414A (en) * | 1988-11-04 | 1990-05-15 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
| EP0431936A1 (en) | 1989-12-06 | 1991-06-12 | Mitsubishi Denki Kabushiki Kaisha | Magnetic recording and reproducing apparatus |
| US5343348A (en) * | 1991-04-03 | 1994-08-30 | Victor Company Of Japan, Ltd. | Actuator for displacing a magnetic head |
-
1987
- 1987-01-10 JP JP371587A patent/JPS63173219A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02126414A (en) * | 1988-11-04 | 1990-05-15 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
| EP0431936A1 (en) | 1989-12-06 | 1991-06-12 | Mitsubishi Denki Kabushiki Kaisha | Magnetic recording and reproducing apparatus |
| US5725168A (en) * | 1989-12-06 | 1998-03-10 | Mitsubishi Denki Kabushiki Kaisha | Magnetic recording and reproducing apparatus for controlling the tension of a magnetic tape |
| US5947402A (en) * | 1989-12-06 | 1999-09-07 | Mitsubishi Denki Kabushiki Kaisha | Magnetic recording and reproducing apparatus for controlling the tension of a magnetic tape |
| US5343348A (en) * | 1991-04-03 | 1994-08-30 | Victor Company Of Japan, Ltd. | Actuator for displacing a magnetic head |
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