JPS588052B2 - Rotating magnetic head device - Google Patents
Rotating magnetic head deviceInfo
- Publication number
- JPS588052B2 JPS588052B2 JP51136115A JP13611576A JPS588052B2 JP S588052 B2 JPS588052 B2 JP S588052B2 JP 51136115 A JP51136115 A JP 51136115A JP 13611576 A JP13611576 A JP 13611576A JP S588052 B2 JPS588052 B2 JP S588052B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- rotating
- rotating magnetic
- rotary
- fixed
- 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.)
- Expired
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
- G11B5/592—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 using bimorph elements supporting the heads
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Control Of Position Or Direction (AREA)
Description
【発明の詳細な説明】
本発明は磁気記録再生装置の回転磁気ヘッド装置に関す
るもので、回転磁気ヘッドをその回転軌跡と垂直方向に
変位させることによって良好な再生信号を得ることを目
的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating magnetic head device for a magnetic recording/reproducing apparatus, and an object of the present invention is to obtain a good reproduced signal by displacing a rotating magnetic head in a direction perpendicular to its rotation locus.
従来、回転ヘッド型磁気記録再生装置においては、回転
磁気ヘッドは回転軸に金属性の円板もしくは帯状ブロッ
ク体を介して、動作中には動きえないように固着されて
いた。Conventionally, in a rotary head type magnetic recording/reproducing device, the rotary magnetic head has been fixed to the rotating shaft via a metal disc or a band-shaped block so as not to move during operation.
従って、回転磁気ヘッドの回転軌跡は、回転軸中心に垂
直なほぼ完全に平らな面をなしていた。Therefore, the rotation locus of the rotating magnetic head formed an almost completely flat surface perpendicular to the center of the rotation axis.
一方、回転磁気ヘッドに走査されて信号を記録再生され
る磁気テープの走行軌跡は磁気テープガイドの直線性を
はじめとする数多くの原因によって、理想直線に対して
、かなりうねったものとなっている。On the other hand, the running trajectory of a magnetic tape, which is scanned by a rotating magnetic head to record and reproduce signals, is considerably undulating from an ideal straight line due to a number of reasons, including the linearity of the magnetic tape guide. .
その結果、特に、記録装置と再生装置とが異なる場合に
、磁気テープの走行うねりの状態が異なり、いわゆるト
ラックずれを起し、再生信号の不良が発生する恐れがあ
った。As a result, especially when the recording device and the reproducing device are different, the state of the running undulation of the magnetic tape is different, causing so-called track misalignment, and there is a possibility that a defective reproduced signal may occur.
そこで、磁気テープの走行軌跡の直線性を改善するべく
、数多くの工夫がなされてきたが、より高密度な記録を
行なうためには、なお十分ではない。Therefore, many efforts have been made to improve the linearity of the running trajectory of the magnetic tape, but these efforts are still not sufficient to achieve higher density recording.
本発明は、以上の点に鑑み、磁気テープの走行軌跡のう
ねりに対応して回転磁気ヘッドを変位させることによっ
て良好な再生信号を得られる回転ヘッド型磁気記録再生
装置の回転磁気ヘッド装置を提供するものである。In view of the above points, the present invention provides a rotary magnetic head device of a rotary head type magnetic recording/reproducing device that can obtain a good reproduction signal by displacing the rotary magnetic head in response to the undulations of the running trajectory of the magnetic tape. It is something to do.
以下、本発明の回転磁気ヘッド装置について詳細に説明
する。The rotating magnetic head device of the present invention will be explained in detail below.
図面は本発明の回転磁気ヘッド装置の一実施例の断面図
である。The drawing is a cross-sectional view of one embodiment of the rotary magnetic head device of the present invention.
すでによく知られた磁気テープ走行機構によって走行さ
せられる磁気テーブ１をガイドするための磁気テープガ
イド部３を有する下シリンダ５が基板７に固定されてい
る。A lower cylinder 5 having a magnetic tape guide section 3 for guiding a magnetic tape 1 run by a well-known magnetic tape running mechanism is fixed to a substrate 7.
上シリンダ９は外周部において、上記下シリンダ５との
間に若干の間隙１１を形成するごとく、上記下ンリンダ
５に固定されたシリンダ受け１３に固定されている。The upper cylinder 9 is fixed to a cylinder receiver 13 fixed to the lower cylinder 5 so as to form a slight gap 11 between the upper cylinder 9 and the lower cylinder 5 at the outer peripheral portion.
上記下シリンダ５のハウジング部１５にボールベアリン
グ１７ａ，１７ｂによって回転自在に支承されている回
転軸１９は、下部にプーり２１が止ねじ２３により固定
されており、駆動モータ（図示省略）からベルト２５に
よって所定の回転数で回転させられる。A rotary shaft 19 is rotatably supported in the housing part 15 of the lower cylinder 5 by ball bearings 17a and 17b, and a pulley 21 is fixed to the lower part by a set screw 23. 25, it is rotated at a predetermined number of rotations.
また、上記回転軸１９の上部には円筒状の圧電素子１２
７が固着されており、その上端面３１には、周縁部の適
所に回転磁気ヘッド３３を接着した金属円板１３５が、
上記回転磁気ヘッド３３が上記間隙１１に位置するよう
に固着されているここで、上記円筒状の圧電素子１２７
は、その内周面と外周面との間に電気エネルギーを与え
た場合の伸縮方向が回転軸の軸方向と一致するごとく上
記回転軸１９に固着され、上記圧電素子１２７の伸縮方
向と垂直な面に回転磁気ヘッド３３を固着している。Further, a cylindrical piezoelectric element 12 is mounted on the upper part of the rotating shaft 19.
7 is fixed, and on its upper end surface 31 is a metal disc 135 with a rotating magnetic head 33 glued at a suitable position on the periphery.
Here, the rotating magnetic head 33 is fixed so as to be located in the gap 11, and the cylindrical piezoelectric element 127
is fixed to the rotating shaft 19 so that the direction of expansion and contraction when electric energy is applied between its inner and outer peripheral surfaces coincides with the axial direction of the rotation shaft, and the piezoelectric element 127 is perpendicular to the direction of expansion and contraction of the piezoelectric element 127. A rotating magnetic head 33 is fixed to the surface.
従って、上記回転磁気ヘッド３３が回転させられ、上記
磁気テープ１上を走査することにより信号の記録または
再生が行なわれるのである。Therefore, the rotary magnetic head 33 is rotated and scans the magnetic tape 1 to record or reproduce signals.
なお、上記円筒状の圧電素子１２７への電気エネルギー
の供給は上記金属円板１３５に絶縁的に固定された導電
性回転円板３９と上記上シリンダ９に絶縁的に固定され
た接触子４１とによって行なわれるようになっている。The electric energy is supplied to the cylindrical piezoelectric element 127 by a conductive rotating disk 39 insulatively fixed to the metal disk 135 and a contactor 41 insulatively fixed to the upper cylinder 9. It is now carried out by
また、上記磁気ヘッド３３と増巾器（図示省略）との間
の信号の伝達は回転トランス４３を通じて行なわれる。Furthermore, signals are transmitted between the magnetic head 33 and an amplifier (not shown) through a rotary transformer 43.
以上のように本発明の回転磁気ヘッド装置によれば、磁
気テープの走行うねりを検出し、その量に対応した電気
エネルギーを円筒状の圧電素子に加えて、回転磁気ヘッ
ドの高さ位置を変化させることによって、いわゆるトラ
ックずれによる再生信号の劣化が皆無となり、非常に良
好な再生信号が得られるものである。As described above, according to the rotating magnetic head device of the present invention, the height position of the rotating magnetic head is changed by detecting the running undulation of the magnetic tape and applying electrical energy corresponding to the amount to the cylindrical piezoelectric element. By doing so, there is no deterioration of the reproduced signal due to so-called track deviation, and a very good reproduced signal can be obtained.
なお、本発明において使用する回転磁気ヘッド変位用の
圧電素子として、２枚の圧電板を貼り合わせた、いわゆ
る矩形板状のバイモルフ形式ではなく、円筒状のものと
したことによる効果を列記する占下記のごとくである。The piezoelectric element for displacing the rotary magnetic head used in the present invention is not a so-called rectangular plate-shaped bimorph type, in which two piezoelectric plates are bonded together, but a cylindrical element is used. It is as follows.
■ バイモルフ形式の場合、屈曲変形という原理上、回
転磁気ヘッドの位置移動に伴い、回転磁気ヘッドに傾斜
角を生じ、磁気テープとの接触状態の劣化をまねくが、
本発明の場合は、純粋に回転軸心と平行方向への移動で
あり、回転磁気ヘッドと磁気テープとの接触状態の劣化
は生じない。■ In the case of the bimorph type, due to the principle of bending deformation, as the rotating magnetic head moves in position, an inclination angle is created in the rotating magnetic head, leading to deterioration of the contact state with the magnetic tape.
In the case of the present invention, the movement is purely in the direction parallel to the rotation axis, and the contact state between the rotating magnetic head and the magnetic tape does not deteriorate.
■ バイモルフ形式の場合、片持はりの先端に回転磁気
ヘッドを設けざるをえないので、回転磁気ヘッド位置の
経時的安定性、外乱に対する安定性に欠けるとともに、
磁気ヘッドーバイモルフ系の共振周波数が低くなってし
まうという問題があるが、本発明によれば、磁気ヘッド
ー圧電素子系の剛性を高くできるので、共振周波数が高
く、安定性の大きい構造が可能である。■ In the case of the bimorph type, the rotating magnetic head must be installed at the tip of the cantilever beam, so the position of the rotating magnetic head lacks stability over time and stability against external disturbances.
There is a problem that the resonant frequency of the magnetic head-bimorph system becomes low, but according to the present invention, the rigidity of the magnetic head-piezoelectric element system can be increased, making it possible to create a structure with a high resonant frequency and great stability. be.
■ バイモルフ形式のように圧電素子を貼り合わせるた
めの接着剤は使用しないので特性のばらつきが少ない。■ Unlike the bimorph type, no adhesive is used to bond the piezoelectric elements together, so there is less variation in characteristics.
■ 薄板ではなく、ブロック状でよく、また貼り合わせ
る必要もないので、セラミック材料として量産性に富ん
でいる。■ It can be made into a block rather than a thin plate, and there is no need to bond it together, making it highly suitable for mass production as a ceramic material.
図面は本発明の一実施例を示す回転磁気ヘッド装置の断
面図である。
１……磁気テープ、３……磁気テープガイド部、５……
下シリンダ、７……基板、９……上シリンダ、１７ａ，
１７ｂ……ボールベアリング……回転軸、３３……回転
磁気ヘッド、３９……導電性回転円板、４１……接触子
、１２７……円筒状の圧電素子、１３５……金属円板。The drawing is a sectional view of a rotating magnetic head device showing an embodiment of the present invention. 1...Magnetic tape, 3...Magnetic tape guide section, 5...
Lower cylinder, 7... Board, 9... Upper cylinder, 17a,
17b... Ball bearing... Rotating shaft, 33... Rotating magnetic head, 39... Conductive rotating disk, 41... Contactor, 127... Cylindrical piezoelectric element, 135... Metal disk.
Claims (1)
きつけて走行させ、上記磁気テープに回転磁気ヘッドで
信号を記録または再生するように構成し、かつ、上記回
転磁気ヘッドを回転するための回転軸と、上記回転磁気
ヘッドを回転させるとともに上記回転磁気ヘッドを変位
させるための円筒状の圧電素子とを具備し、上記圧電素
子は、その内周面と外周面との間に電気エネルギーを与
えた場合の伸縮方向が上記回転軸の軸方向と一致するご
とく上記回転軸に固着し、上記圧電素子の伸縮方向と垂
直な面部に上記回転磁気ヘッドを固着したことを特徴と
する回転磁気ヘッド装置。1. A magnetic tape is wound around a cylindrical tape guide cylinder and run, and a rotating magnetic head is configured to record or reproduce signals on the magnetic tape, and a rotating shaft for rotating the rotating magnetic head; a cylindrical piezoelectric element for rotating the rotating magnetic head and displacing the rotating magnetic head; A rotary magnetic head device, characterized in that the rotary magnetic head is fixed to the rotary shaft so that the direction of expansion and contraction coincides with the axial direction of the rotary shaft, and the rotary magnetic head is fixed to a surface portion of the piezoelectric element perpendicular to the direction of expansion and contraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51136115A JPS588052B2 (en) | 1976-11-11 | 1976-11-11 | Rotating magnetic head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51136115A JPS588052B2 (en) | 1976-11-11 | 1976-11-11 | Rotating magnetic head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5360617A JPS5360617A (en) | 1978-05-31 |
| JPS588052B2 true JPS588052B2 (en) | 1983-02-14 |
Family
ID=15167638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51136115A Expired JPS588052B2 (en) | 1976-11-11 | 1976-11-11 | Rotating magnetic head device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588052B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61197368U (en) * | 1985-05-30 | 1986-12-09 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5986060U (en) * | 1982-11-30 | 1984-06-11 | ソニー株式会社 | Rotating head type magnetic recording and reproducing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5650329B2 (en) * | 1972-05-22 | 1981-11-28 | ||
| JPS5242319A (en) * | 1975-09-30 | 1977-04-01 | Sony Corp | Tracking control system for video signal reproduction set |
| US4093885A (en) * | 1976-03-19 | 1978-06-06 | Ampex Corporation | Transducer assembly vibration sensor |
-
1976
- 1976-11-11 JP JP51136115A patent/JPS588052B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61197368U (en) * | 1985-05-30 | 1986-12-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5360617A (en) | 1978-05-31 |
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