JPH0460915A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPH0460915A JPH0460915A JP16961990A JP16961990A JPH0460915A JP H0460915 A JPH0460915 A JP H0460915A JP 16961990 A JP16961990 A JP 16961990A JP 16961990 A JP16961990 A JP 16961990A JP H0460915 A JPH0460915 A JP H0460915A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- magnetic head
- cylindrical coil
- magnetic
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 17
- 239000000696 magnetic material Substances 0.000 claims description 9
- 230000004907 flux Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 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 3
- 239000007799 cork Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 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、磁気記録再生装置に関し、特に、ビデオテ
ープレコーダ、デジタルビデオテープレコーダなどのよ
うに回転ヘッドアセンブリを備えた磁気記録再生装置の
磁気ヘッド駆動部の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing device, and in particular to a magnetic recording and reproducing device equipped with a rotating head assembly such as a video tape recorder and a digital video tape recorder. This invention relates to improvement of the head drive unit.
第５図は従来の磁気記録再生装置の主要部を示ず断面回
、第６図は第５図のＶｌ −Ｖｌ矢視図である。FIG. 5 is a cross-sectional view of a conventional magnetic recording/reproducing apparatus, not showing the main parts, and FIG. 6 is a view taken along the line Vl--Vl in FIG.
第５図２第６図において、１は固定ドラム、２はこの固
定トラＪ、１に取付けられた軸受、３はこの軸受２に支
承されて回転するＩｉ回転軸、４はこの回転軸３の一端
に嵌着された台座、５はこの台座４にネジ６を用いて取
付られた回転ドラムである。７は」二足回転ドラム５に
ネジ８を用いて取イ」レノられた磁気ヘット駆動装置、
９は」二足固定ドラム１に取イ」けられた下トランス、
１０は台座４に取付けられた上１〜ランス、１１は上記
回転ドラム５に取付けられた配線板、１２は磁気ヘット
駆動装置７に制御電流を供給するための回転しない接触
子である。In Fig. 5 and Fig. 6, 1 is a fixed drum, 2 is a bearing attached to this fixed truck J, 3 is a rotating shaft Ii that is supported by this bearing 2 and rotates, and 4 is a rotating shaft of this rotating shaft 3. A pedestal 5 fitted at one end is a rotating drum attached to the pedestal 4 using screws 6. 7 is a magnetic head drive device that is attached to the bipedal rotating drum 5 using screws 8;
9 is the lower transformer attached to the two-legged fixed drum 1;
Reference numeral 10 indicates an upper lance attached to the base 4, 11 a wiring board attached to the rotating drum 5, and 12 a non-rotating contact for supplying control current to the magnetic head drive device 7.
また、１３は」二足接触子１２と摺接するように台座４
の一部に設けた回転する電極、１４はこの電極１３から
接触部１５および配線板１１を経由して磁気ヘット駆動
装置７に電気的接触する接続部、１６は磁気ヘッド駆動
部７に取付けられている磁気ヘッドであり、接続部１７
．配線板１１゜接続部１５を経て斗−１−ランス１０に
電気的に接続されている。１８は磁気ヘット駆動装置７
を収納するための回転ドラム５の一部に設けた凹所であ
り、磁気ヘッド１６を位置調整できるように磁気−・ン
ド駆動部７より大きく形成されている。１９は磁気ヘッ
ト１６の位置調整のだめの位置調整用孔、２０は磁気ヘ
ッド１６と摺接する磁気テープである。13 is a pedestal 4 which is in sliding contact with the bipedal contact 12.
A rotating electrode 14 is connected to the magnetic head drive unit 7 from the electrode 13 via a contact part 15 and a wiring board 11, and a connection part 16 is attached to the magnetic head drive unit 7. It is a magnetic head with a connection part 17.
．． The wiring board 11 is electrically connected to the dowel-1 lance 10 via the connection portion 15 . 18 is a magnetic head drive device 7
This is a recess provided in a part of the rotating drum 5 for storing the magnetic head 16, and is larger than the magnetic head drive unit 7 so that the position of the magnetic head 16 can be adjusted. 19 is a position adjustment hole for position adjustment of the magnetic head 16, and 20 is a magnetic tape that comes into sliding contact with the magnetic head 16.
また、第７図、第８図および第９図は」−記（〃気・＼
ント駆動装置７をさらに詳細に示すもので、各図におい
て、２１は磁性材料からなる第１のヨーク、２２はこの
第１のヨーク２１に固着された柱状の第１の永久磁石、
２３ば内周の一部に凸形状部２３ｂを有していて」−起
筆１のコーク２１に取付けられた磁性材料からなる第２
のヨーク、２４はこの第２のヨーク２３に取（（ｊけら
れた磁性材料からなる第３のヨークである。In addition, Figures 7, 8, and 9 are
The actuator 7 is shown in more detail, and in each figure, 21 is a first yoke made of a magnetic material, 22 is a columnar first permanent magnet fixed to the first yoke 21,
23 has a convex portion 23b on a part of the inner periphery.
The yoke 24 is a third yoke made of a magnetic material attached to the second yoke 23.
２５ば」二足第１の永久磁石２２と同一・の磁極を対向
させて上記第３のヨーク２４に固着された柱状の第２の
永久磁石、２６はこの第２の永久磁石２５と第１の永久
磁石２２の間にあって、いずれか一方に固着された磁性
材料からなるポールピースである。25 is a columnar second permanent magnet fixed to the third yoke 24 with the same magnetic poles as the first permanent magnet 22 facing each other; This is a pole piece made of a magnetic material that is located between the permanent magnets 22 and fixed to either one of them.
２７は薄板の非磁性材料からなる板バネであり、上記第
１のヨーク２１と第２のヨーク２３て挟持され、かつ、
その延在部２７ａは第１のヨーク２１および第２のヨー
ク２３に設けられている窓２１ａ ２３ａを通って外
方に突出されており、その先端に磁気ヘット１６が取付
けられている。２８は薄板の非磁性材料からなる板バネ
で、上記第２ヨーク２３と第３ヨーク２４で挟持されて
いる。27 is a plate spring made of a thin non-magnetic material, which is held between the first yoke 21 and the second yoke 23, and
The extending portion 27a projects outward through windows 21a to 23a provided in the first yoke 21 and the second yoke 23, and the magnetic head 16 is attached to the tip thereof. A plate spring 28 is made of a thin non-magnetic material and is held between the second yoke 23 and the third yoke 24.
２９は板ハ＄２７．２８にそれぞれ保持されている固定
部材、３０は内周が第１の永久磁石２２、第２の永久磁
石２５およびポールピース２６の外周との間にギャップ
を有する位置において固定部材２９に接着剤３２を用い
て固着されたボビン、３１はこのボビン３０に巻回され
た被覆材を有する電線からなるコイルで、上記第２のヨ
ーク２３の凸形状部２３ｂとの間に全周にわたって環状
のギャップＧを有している。Reference numeral 29 denotes a fixed member held by the plate 27.28, and 30 indicates a position where the inner circumference has a gap between the outer circumferences of the first permanent magnet 22, the second permanent magnet 25, and the pole piece 26. A bobbin 31 is fixed to the fixing member 29 using an adhesive 32, and 31 is a coil made of an electric wire having a covering material wound around the bobbin 30. It has an annular gap G over the entire circumference.
次に、上記構成の動作について第８図を参照して説明す
る。Next, the operation of the above configuration will be explained with reference to FIG.
まず、第１の永久磁石２２ばポールピース２６、第２の
ヨーク２３および第１のヨーク２１で作る閉磁路により
磁束りを発生ずる。First, magnetic flux is generated by a closed magnetic path formed by the first permanent magnet 22, the pole piece 26, the second yoke 23, and the first yoke 21.
同様に、第２の永久磁石２５はポールピース２６、第２
のヨーク２３および第３のヨーク２４で作る閉磁路によ
り上記磁束りと逆向きの磁束上を発生する。Similarly, the second permanent magnet 25 is connected to the pole piece 26, the second
A closed magnetic path formed by the yoke 23 and the third yoke 24 generates a magnetic flux in the opposite direction to the above magnetic flux.
このように発生した磁束り及び磁束Ｅはともに環状ギャ
ップＦ、 Ｇを同一の方向に横切り、コイル３１に第１
の永久磁石２２と第２の永久磁石２５の合計した磁束が
横切る。Both the magnetic flux and the magnetic flux E generated in this way cross the annular gaps F and G in the same direction, and cause the coil 31 to pass through the first
The total magnetic flux of the permanent magnet 22 and the second permanent magnet 25 intersects.
この状態で、コイル３１に接触子１２から電極１３、接
続部１５．１４を経て電流を流すと、コイル３１とボビ
ン３０と磁気ヘッド１６は一体となって上下に平行に直
線運動をする。In this state, when a current is passed through the coil 31 from the contactor 12 through the electrode 13 and the connecting portion 15.14, the coil 31, bobbin 30, and magnetic head 16 move linearly in parallel up and down as one body.
これにより、磁気ヘッド１６は磁気テープ２０の幅方向
に変位し、磁気記録跡を精度よくトレースする。As a result, the magnetic head 16 is displaced in the width direction of the magnetic tape 20 and traces the magnetic recording trace with high accuracy.
第１０図は磁気ヘッド駆動装置７の駆動電流と変位の間
のヒステリシス特性を示し、第１１図はこのようなヒス
テリシス特性を有する磁気ヘッド駆動部７により記録を
おこなった時の磁気テープ２０−１−の記録ｌ・う、り
′［゛を表し７ている。FIG. 10 shows the hysteresis characteristics between the drive current and displacement of the magnetic head drive device 7, and FIG. 11 shows the magnetic tape 20-1 when recording is performed by the magnetic head drive section 7 having such hysteresis characteristics. The record of - represents 7.
−］−記第１０図、第１１図から明らかなように、初期
段階で磁気−・ラド駆動部７を調整するだけの場合は、
第１０図のようなヒステシス特性により、磁気へノド】
６の基準位置が変化し、記録をおこなうにあたって記録
トラックＴがｄで示すように重なり合う。-]- As is clear from Figs. 10 and 11, when only adjusting the magnetic/rad drive unit 7 at the initial stage,
Due to the hysteresis characteristics shown in Figure 10, the magnetic node]
The reference position of 6 changes, and the recording tracks T overlap as shown by d during recording.
従来の磁気記録再生装置は以上のように構成されており
、駆動電流と変位の間のヒステリシスが存在するので、
特殊再生２通常再生をおこなったのち記録する場合、定
められた一定の場所にる〃気ベンドが移動せず、１８０
°対向した２つの磁気ヘッド間の高さに段差が生し、そ
の結果、記録トランク同士が重なり合って、良好な記録
トランクを得ることができず、画質劣化を招くなどの問
題があった。Conventional magnetic recording and reproducing devices are configured as described above, and since there is hysteresis between the drive current and displacement,
Special playback 2 When recording after performing normal playback, the air bend at a fixed location does not move and the 180
There is a difference in height between the two opposing magnetic heads, and as a result, the recording trunks overlap each other, making it impossible to obtain a good recording trunk and causing problems such as deterioration of image quality.
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、記録時にヘッドチャンネル間の高さを調整す
ることができるとともに良好な１〜ラツクを得ることが
でき、画質の向」二を図ることができる磁気記録再生装
置を提供することを目的とする。This invention was made in order to solve the above-mentioned problems, and it is possible to adjust the height between the head channels during recording, and to obtain a good 1-2 rack, which improves the image quality. An object of the present invention is to provide a magnetic recording/reproducing device that can achieve the following.
この発明に係る磁気記録再生装置は、円筒コイルボビン
の内周に形成した磁性材料からなる中空円筒状の第１の
ヨークと、円筒コイルボビンの外周に円筒形コイルと対
向し全周で同一のギャップを形成するように取り付げら
れるとともに、ラジアル方向に着磁された永久磁石と、
この永久磁石の外周に固着された第２ので−クと、この
第２のヨークに固着されるとともにその内部に上記第１
のヨークを固着する第３のヨークとを備えるとともに、
上記中空円筒状の第１のヨークの内部に光センサを配置
し、磁気ヘン１：を延在部に取付げた板バネと共に動く
円筒コイルボビンの内部に反射板を設ｃｔ、この反射板
で上記の光センサで発生した光を反射させ、その検出情
報により磁気ヘッドの位置を制御するように構成したこ
とを特徴とするものである。The magnetic recording/reproducing device according to the present invention includes a hollow cylindrical first yoke made of a magnetic material formed on the inner periphery of a cylindrical coil bobbin, and a cylindrical coil formed on the outer periphery of the cylindrical coil bobbin, facing the cylindrical coil and having the same gap around the entire circumference. a permanent magnet mounted to form a permanent magnet and magnetized in a radial direction;
A second yoke is fixed to the outer periphery of the permanent magnet, and a second yoke is fixed to the second yoke and has the first yoke fixed to the inside thereof.
and a third yoke that fixes the yoke of the yoke.
An optical sensor is disposed inside the hollow cylindrical first yoke, and a reflection plate is installed inside the cylindrical coil bobbin that moves together with a leaf spring having the magnetic hem 1 attached to the extension part. This device is characterized in that the light generated by the optical sensor is reflected and the position of the magnetic head is controlled based on the detected information.
この発明によれば、磁気へ゛ノドの位置を光センサで検
出し、その検出情報により磁気ヘッドの位置を制御する
ことにより、磁気ヘッドが磁気テープに突入する時の高
さを常に一定にして、良好な記録トランクを得ることが
できる。According to this invention, the position of the magnetic head is detected by an optical sensor, and the position of the magnetic head is controlled based on the detected information, so that the height when the magnetic head plunges into the magnetic tape is always kept constant. A good recording trunk can be obtained.
〔実施例］ 以下、この発明の一実施例を図面に基づいて説明する。〔Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明の一実施例による磁気記録再生装置の磁
気ヘット駆動部を示す断面図、第２図は本発明の一実施
例による磁気記録再生装置の磁気記録再生装置の駆動系
の動作を説明するための図、第３図は第１図の光センサ
における動作を説明するだめの図、第４図は第１図の光
センサにより磁気ヘットを制御する動作を説明するため
の図である。FIG. 1 is a cross-sectional view showing a magnetic head drive unit of a magnetic recording and reproducing device according to an embodiment of the present invention, and FIG. 2 is an operation of the drive system of the magnetic recording and reproducing device of the magnetic recording and reproducing device according to an embodiment of the present invention. Figure 3 is a diagram for explaining the operation of the optical sensor in Figure 1, and Figure 4 is a diagram for explaining the operation of controlling the magnetic head by the optical sensor in Figure 1. be.
第１図において、３３は円筒コイルボビン３（）の内周
部に形成した磁性材料からなる中空円筒状の第１のコー
ク、３４は円筒コイルボビン３０の外周に円筒形コイル
３１と対向し全周で同一のギャップを形成するように取
付けられたラジアル方向に着磁された永久磁石、３５は
永久磁石３４の外周に固着された第２のヨーク、３６は
第２のヨーク３５と固着されるとともにその内部に第１
のヨーク３３を固着した第３のヨーク、３７ば第１のヨ
ーク３３の中空部で第３のヨーク３６に固着された光セ
ンサ、３８は光センサ３７で発生した光を反射させる反
射板である。反射板３８は動作中に第１のヨーク３３と
接触しないように配置されており、円筒コイルボビン３
０に形成されている。In FIG. 1, 33 is a hollow cylindrical first cork made of a magnetic material formed on the inner circumference of the cylindrical coil bobbin 3 (), and 34 is a hollow cylindrical first cork formed on the outer circumference of the cylindrical coil bobbin 30, facing the cylindrical coil 31, and extending all around the cylindrical coil bobbin 30. Permanent magnets magnetized in the radial direction are attached to form the same gap, 35 is a second yoke fixed to the outer periphery of the permanent magnet 34, 36 is fixed to the second yoke 35 and its 1st inside
37 is a light sensor fixed to the third yoke 36 in the hollow part of the first yoke 33; 38 is a reflector that reflects the light generated by the light sensor 37; . The reflection plate 38 is arranged so as not to come into contact with the first yoke 33 during operation, and is arranged so as not to contact the first yoke 33 during operation.
0.
上記光センサ３７は第３図で示すように光を照射する発
光部３７ａと光を受ける受光部３７ｂとにより構成され
おり、発光部３７ａはＬ Ｅ Ｄもしくば半導体レーザ
等の光発生素子を使用し、受光部３７ｂは位置検出素子
で構成されている。As shown in FIG. 3, the optical sensor 37 is composed of a light emitting section 37a that emits light and a light receiving section 37b that receives light.The light emitting section 37a uses a light generating element such as an LED or a semiconductor laser. However, the light receiving section 37b is composed of a position detection element.
なお、上記実施例では反射板３８を円筒コイルボビン３
０に設＆Ｊたものを示したが、反射板３８を磁気ヘッド
１６を取付けている板ハネ２７に延長部を設けて、その
延長部上に設けてもよい。In the above embodiment, the reflection plate 38 is connected to the cylindrical coil bobbin 3.
Although the reflector plate 38 is shown as being installed in FIG. 0, the reflector plate 38 may be provided on the extension portion by providing an extension portion on the plate wing 27 to which the magnetic head 16 is attached.
次に動作について説明する。Next, the operation will be explained.
第２図において、中空円筒状でラジアル方向に着磁され
ている永久磁石３４は第１のヨーク３３第２のヨーク３
５．及び第３のヨーク３６とてつ（る閉磁路により磁束
Ｉ（を発生させる。磁束１−１は環状ギャップＩを横切
り、その後の動作は従来と同様で、この状態で、コイル
３１に接触子１２から電極１３、接続部１５．１４を経
て電流を流すと、コイル３１とボビン３０と磁気ヘッド
１６は一体となって上下に平行に直線運動をする。そし
て、磁気ヘッド川６は磁気チー１２０の幅方向に変位し
、磁気記録跡を精度よ（トレースする。In FIG. 2, a permanent magnet 34, which has a hollow cylindrical shape and is magnetized in the radial direction, is connected to a first yoke 33 and a second yoke 3.
5. The third yoke 36 generates a magnetic flux I by a closed magnetic path. The magnetic flux 1-1 crosses the annular gap I, and the subsequent operation is the same as the conventional one. In this state, a contact is placed on the coil 31. When a current is passed from the coil 31 to the electrode 13 and the connecting portion 15.14, the coil 31, bobbin 30, and magnetic head 16 move vertically and in parallel in a straight line as a unit. It is displaced in the width direction, and the magnetic recording trace is accurately traced.
一方、第３図に示すように、コイル３１に電流を流すと
上下両端を板ハネ２７で支持している円筒コイルボビン
３０はＪ方向に移動する。この方向はドラムが回転する
軸方向と一致させである。On the other hand, as shown in FIG. 3, when a current is applied to the coil 31, the cylindrical coil bobbin 30, whose upper and lower ends are supported by leaf springs 27, moves in the J direction. This direction coincides with the axial direction in which the drum rotates.
光センサ３７の発光部３７ａから照射された光は反射板
３８によって反射され受光部３７ｂに入射し、入射した
光は受光部３７ｂの位置検出素子により検出される。The light emitted from the light emitting section 37a of the optical sensor 37 is reflected by the reflecting plate 38 and enters the light receiving section 37b, and the incident light is detected by the position detection element of the light receiving section 37b.
以下、光センサ３７により磁気ヘッド１６を制御する動
作について第４図を用いて説明する。The operation of controlling the magnetic head 16 by the optical sensor 37 will be described below with reference to FIG.
光センサ３７の受光部３７ｂの位置検出素子により検出
された光の電圧出力は、センサアンプ３７Ｃにより増幅
する。ここで、磁気ヘッド１６を移動させたい成る基準
高さをＨ１とし、その位置で光セン・す・３７により得
られる電圧を規定電圧４０とする。例えば記録時におい
て、規格通りに磁気テープ２０に磁気ヘッド１６が突入
するときの高さを基準高さとし、そのときの電圧を規定
電圧４０とする。そして規定電圧４０と光センサ３７、
つまりセンサアンプ３７ｃから出力される電圧とを減算
器３７ｄで減算して、その差をとり、その差がなくなる
ようにドライバ３９を介して磁気ヘッド駆動装置７の磁
気ヘッド１６を変位させる。The voltage output of the light detected by the position detection element of the light receiving section 37b of the optical sensor 37 is amplified by the sensor amplifier 37C. Here, the reference height to which the magnetic head 16 is moved is defined as H1, and the voltage obtained by the optical sensor 37 at that position is defined as the specified voltage 40. For example, during recording, the height at which the magnetic head 16 plunges into the magnetic tape 20 according to the standard is set as the reference height, and the voltage at that time is set as the specified voltage 40. And the specified voltage 40 and the optical sensor 37,
That is, the subtracter 37d subtracts the voltage output from the sensor amplifier 37c, the difference is taken, and the magnetic head 16 of the magnetic head drive device 7 is displaced via the driver 39 so that the difference disappears.
あらかじめドラム等の外部部品と、磁気ヘッド１６との
位置関係を測定しておけば、円筒コイルボビン３０の絶
対位置を把握することができる。By measuring the positional relationship between external parts such as a drum and the magnetic head 16 in advance, the absolute position of the cylindrical coil bobbin 30 can be determined.
このように、本実施例においては、磁気ヘッド１６の位
置を光センサ３７で検出し、その検出情報により円筒コ
イルボビン３０の絶対位置を把握し、磁気ヘット１６の
位置を制御するようにしたので、磁気ヘッドが磁気テー
プに突入する時の高さを常に一定にでき、各々の磁気ヘ
ッド駆動装置７において、記録時のチャンネル間での段
差をなくすことができ、また、）Ｉ ｉ ｆオーディオ
ヘットとの段差位置関係も規格通りに保持することがで
きる。In this way, in this embodiment, the position of the magnetic head 16 is detected by the optical sensor 37, and the absolute position of the cylindrical coil bobbin 30 is grasped based on the detected information, and the position of the magnetic head 16 is controlled. The height when the magnetic head plunges into the magnetic tape can be kept constant, and in each magnetic head drive device 7, there can be no difference in level between channels during recording. It is also possible to maintain the level difference positional relationship according to the standard.
また円筒コイルボビン３０の位置情報を利用して、閉ル
ープのポジションサーボを構成することによって外乱に
対する剛性を電気的に高くすることもできる。Further, by using the position information of the cylindrical coil bobbin 30 to configure a closed-loop position servo, it is also possible to electrically increase the rigidity against disturbances.
また、磁気ヘッド駆動装置に関してオブザーバ等を構成
し、磁気ヘッド駆動装置の駆動電流と円筒コイルボビン
の位置情報とからコイルボビンの速度を推定し、推定速
度を負帰還することで電気的ダンピングも行える。Further, an observer or the like is configured for the magnetic head drive device, the speed of the coil bobbin is estimated from the drive current of the magnetic head drive device and the position information of the cylindrical coil bobbin, and electrical damping can also be performed by negative feedback of the estimated speed.
以上のように、この発明によれば、中空円筒状の第１の
ヨークとラジアル方向に着磁された中空円筒の磁気によ
りギャップが形成されており、上記中空円筒状の第１の
ヨークの内部に光センサを配置し、磁気ヘッドを延在部
に取付けた板バネと共に動く円筒コイルボビンの内部に
反射板を設け、この反射板で上記の光センサで発生した
光を反射させ、その検出情報により磁気ヘッドの位置を
制御するように構成したので、磁気ヘッドを決まった位
置に移動させて各チャンネルの磁気ヘラ１、°間の段差
をなくすことができ、また、Ｈｉｆｉオーディオヘッド
との段差位置関係も規格どおり保持することができ、良
好な記録トラックを得ることができ、画質の向上を図る
ことができるという効果がある。As described above, according to the present invention, a gap is formed by the magnetism between the hollow cylindrical first yoke and the hollow cylinder magnetized in the radial direction, and the gap is formed inside the hollow cylindrical first yoke. An optical sensor is placed on the cylindrical coil bobbin, which moves together with a leaf spring attached to the magnetic head on the extension part.A reflective plate is provided inside the cylindrical coil bobbin, and this reflective plate reflects the light generated by the optical sensor, and based on the detected information. Since the configuration is configured to control the position of the magnetic head, it is possible to move the magnetic head to a fixed position and eliminate the level difference between the magnetic spatulas 1 and ° of each channel. This has the effect that it is possible to maintain the data according to the standard, obtain a good recording track, and improve the image quality.
第１図は本発明の一実施例による磁気記録再生装置の磁
気ヘッド駆動装置を示す断面図、第２図は本発明の一実
施例による磁気記録再生装置の磁気ヘット駆動装置の駆
動系の動作を説明する図、第３図は本発明の一実施例に
よる磁気記録再生装置の光センサにおける動作を説明す
る図、第４図は本発明の一実施例による磁気記録再生装
置の光センサにより磁気ヘッドを制御する動作を説明す
る図、第５図は従来の磁気記録再生装置の主要部を示す
断面図、第６図は第５図のＶＴ−ＶＴ線に沿う矢視図、
第７図は従来の磁気ヘッド駆動装置の詳細を示す要部の
拡大平面図、第８図は第７図のｖ■■線に沿う断面図、
第９図の第８図の側面図、第１０図は従来の磁気記録再
生装置の磁気ヘッド駆動電流と変位の間のヒステリシス
特性を示す図、第１１図は従来の磁気記録再生装置によ
り記録を行ったときのトラックを表す図である。
７は磁気ヘッド駆動装置、１６は磁気ヘッド、２７は板
ハネ、３０は円筒コイルボビン、３３は第１のヨーク、
３４は永久磁石、３５は第２のヨーク、３６は第３のヨ
ーク、３７は光センサ、３７ａは発光部、３７ｂは受光
部、３７ｃはセンサアンプ、３７ｄは減算器、３８は反
射部、３９ばドライバ、４０は規定電圧である。
なお、図中同一符号は同一または相当部分を示す。FIG. 1 is a sectional view showing a magnetic head drive device of a magnetic recording and reproducing device according to an embodiment of the present invention, and FIG. 2 is an operation of the drive system of the magnetic head drive device of a magnetic recording and reproducing device according to an embodiment of the present invention. FIG. 3 is a diagram illustrating the operation of the optical sensor of the magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view showing the main parts of a conventional magnetic recording/reproducing device; FIG. 6 is a view taken along the line VT-VT in FIG. 5;
FIG. 7 is an enlarged plan view of the main parts showing details of a conventional magnetic head drive device, and FIG. 8 is a sectional view taken along the line v in FIG. 7.
FIG. 9 is a side view of FIG. 8, FIG. 10 is a diagram showing the hysteresis characteristic between the magnetic head drive current and displacement of a conventional magnetic recording/reproducing device, and FIG. It is a diagram showing the track when I went there. 7 is a magnetic head drive device, 16 is a magnetic head, 27 is a plate blade, 30 is a cylindrical coil bobbin, 33 is a first yoke,
34 is a permanent magnet, 35 is a second yoke, 36 is a third yoke, 37 is an optical sensor, 37a is a light emitting section, 37b is a light receiving section, 37c is a sensor amplifier, 37d is a subtracter, 38 is a reflecting section, 39 For example, the driver 40 is a specified voltage. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
ボビンと、 上記円筒コイルボビンをトランポリン動作により支持す
る非磁性材料からなる一対の板バネと、上記一対の板バ
ネのうちの一方の延在部に取り付けられた磁気ヘッドと
を備えた磁気記録再生装置において、 上記磁気ヘッドを駆動する磁気ヘッド駆動部は、上記円
筒コイルボビンの内周に形成した磁性材料からなる中空
円筒状の第１のヨークと、 上記円筒コイルボビンの外周に上記円筒形コイルと対向
し全周で同一のギャップを形成するように取り付けられ
るとともに、ラジアル方向に着磁された永久磁石と、 上記永久磁石の外周に固着された第２のヨーク上記第２
のヨークに固着されるとともに、その内部に第１のヨー
クが固着された第３のヨークと、上記円筒形コイルの内
部に形成された、上記磁気ヘッドを延在部に取り付けた
板バネと一体にトランポリン動作する反射部と、 発光部と受光部を有し、上記第１ヨークの中空内部で第
３のヨークに固着され、該発光部で発行した光を上記反
射部で反射させて上記受光部で受光することにより、上
記円筒コイルボビンの位置を検出する光センサとからな
ることを特徴とする磁気記録再生装置。(1) A cylindrical coil bobbin having a cylindrical coil fixed to its outer periphery; a pair of leaf springs made of a non-magnetic material that supports the cylindrical coil bobbin through trampoline action; and an extension of one of the pair of leaf springs. In the magnetic recording and reproducing device, the magnetic head drive unit that drives the magnetic head includes a hollow cylindrical first yoke made of a magnetic material formed on the inner periphery of the cylindrical coil bobbin; , a permanent magnet attached to the outer periphery of the cylindrical coil bobbin so as to face the cylindrical coil so as to form the same gap around the entire circumference, and magnetized in the radial direction; and a permanent magnet fixed to the outer periphery of the permanent magnet. 2 yoke above 2nd
A third yoke is fixed to the yoke, and the first yoke is fixed inside the third yoke, and a plate spring formed inside the cylindrical coil and having the magnetic head attached to the extension part is integrated with the third yoke. a reflecting section that operates as a trampoline; a light emitting section; and a light receiving section, the light emitting section being fixed to a third yoke in the hollow interior of the first yoke, and the light emitted by the light emitting section being reflected by the reflecting section and receiving the light. 1. A magnetic recording and reproducing device comprising: an optical sensor that detects the position of the cylindrical coil bobbin by receiving light at the cylindrical coil bobbin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16961990A JPH087854B2 (en) | 1990-06-26 | 1990-06-26 | Magnetic recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16961990A JPH087854B2 (en) | 1990-06-26 | 1990-06-26 | Magnetic recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0460915A true JPH0460915A (en) | 1992-02-26 |
| JPH087854B2 JPH087854B2 (en) | 1996-01-29 |
Family
ID=15889859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16961990A Expired - Lifetime JPH087854B2 (en) | 1990-06-26 | 1990-06-26 | Magnetic recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH087854B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343348A (en) * | 1991-04-03 | 1994-08-30 | Victor Company Of Japan, Ltd. | Actuator for displacing a magnetic head |
| US5896979A (en) * | 1995-10-19 | 1999-04-27 | Fuji Xerox Co., Ltd. | Endless belt type delivery device |
| EP0967597A1 (en) * | 1998-06-22 | 1999-12-29 | Hewlett-Packard Company | Magnetic head carriage and actuator assembly |
| US6333838B1 (en) | 1998-06-22 | 2001-12-25 | Hewlett-Packard Co. | Voice coil actuated carriage in which a support structure for the carriage is disposed at least partially within the motor |
| US6388836B2 (en) | 1998-11-13 | 2002-05-14 | Hewlett-Packard Company | Magnetic shield for a tape drive read/write head |
-
1990
- 1990-06-26 JP JP16961990A patent/JPH087854B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343348A (en) * | 1991-04-03 | 1994-08-30 | Victor Company Of Japan, Ltd. | Actuator for displacing a magnetic head |
| US5896979A (en) * | 1995-10-19 | 1999-04-27 | Fuji Xerox Co., Ltd. | Endless belt type delivery device |
| EP0967597A1 (en) * | 1998-06-22 | 1999-12-29 | Hewlett-Packard Company | Magnetic head carriage and actuator assembly |
| US6333838B1 (en) | 1998-06-22 | 2001-12-25 | Hewlett-Packard Co. | Voice coil actuated carriage in which a support structure for the carriage is disposed at least partially within the motor |
| US6411474B1 (en) | 1998-06-22 | 2002-06-25 | Hewlett-Packard Co. | Carriage and actuator assembly |
| US6388836B2 (en) | 1998-11-13 | 2002-05-14 | Hewlett-Packard Company | Magnetic shield for a tape drive read/write head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH087854B2 (en) | 1996-01-29 |
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