JPS60115017A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPS60115017A JPS60115017A JP22276083A JP22276083A JPS60115017A JP S60115017 A JPS60115017 A JP S60115017A JP 22276083 A JP22276083 A JP 22276083A JP 22276083 A JP22276083 A JP 22276083A JP S60115017 A JPS60115017 A JP S60115017A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- head
- drum
- piezoelectric element
- magnetic head
- 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
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
- G11B5/52—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
Abstract
Description
【発明の詳細な説明】 技術分野 本発明はＶＴＲ等の磁気記録再生装置に関する。[Detailed description of the invention] Technical field The present invention relates to a magnetic recording/reproducing device such as a VTR.
従来技術
近年、ＶＴＲ等の磁気記録再生装置の普及はめざましく
、民生用ＶＴＲ装置では特にこの傾向が著しい。そして
、アジマス記録の発明によって記録が更に高密度化した
ため、その普及の加速度が増している。BACKGROUND OF THE INVENTION In recent years, magnetic recording and reproducing devices such as VTRs have become widespread, and this trend is particularly remarkable in consumer VTR devices. With the invention of azimuth recording, recording has become even more dense, and its popularity is accelerating.
添付図面の第１図を参照して従来装置を説明する。第１
図は従来のヘリカルスキャン型アジマス２ヘツドＶＴＲ
のドラムの構成を示しており、第１図（ａ）は平面図、
第１図（ｂ）は側面図である。なお、以下の図面の説明
において、同一要素は同一符号で示す。ドラム１は回転
ドラムをなす上ドラム２と固定ドラムをなす下ドラム３
から構成され、−ヒトラム２には磁気ヘッド４，５が設
けられている。A conventional device will be described with reference to FIG. 1 of the accompanying drawings. 1st
The figure shows a conventional helical scan type azimuth 2-head VTR.
Fig. 1(a) is a plan view,
FIG. 1(b) is a side view. In addition, in the following description of the drawings, the same elements are indicated by the same reference numerals. Drum 1 consists of an upper drum 2 that is a rotating drum and a lower drum 3 that is a fixed drum.
The magnetic head 2 is provided with magnetic heads 4 and 5.
そして、磁気ヘッド４，５は図示の如く水平線に対しθ
１．θ、の角度を持っている。ここで、ｌθｔｌ＋ ｌ
θ！１≧６°であれば、画記録トラック間でのクロス）
−りが見られなくなる。The magnetic heads 4 and 5 are set at θ with respect to the horizontal line as shown in the figure.
1. It has an angle of θ. Here, lθtl+l
θ! If 1≧6°, cross between image recording tracks)
- The color is no longer visible.
ところが上記の如き従来装置では、再生ではないモード
（例えば早送り２巻戻しなど）でも磁気ヘッド４，５が
磁気テープに接触しているため、ローディング状態で磁
気ヘッドが削ってしまったり、インパクトエラー等が生
じたりする。また、早送り、巻戻しを繰り返すことによ
り磁気テープ、磁気ヘッドが摩耗するという欠点も生じ
る。However, in the conventional device as described above, since the magnetic heads 4 and 5 are in contact with the magnetic tape even in modes other than playback (for example, fast forward, double rewind, etc.), the magnetic heads may be scraped during loading, or impact errors may occur. may occur. Further, repeating fast forwarding and rewinding causes the magnetic tape and magnetic head to wear out.
他方、従来装置では、早送り２巻戻し時には磁気ヘッド
は磁気テープに接触しているにも拘らず画像は再生して
いないので、オペレータはどのあたりを早送り９巻戻し
しているか知ることができないという欠点がある。On the other hand, with conventional devices, the image is not being reproduced even though the magnetic head is in contact with the magnetic tape during fast forwarding and rewinding, so the operator cannot know where the fast forwarding and rewinding are being performed. There are drawbacks.
目 的
本発明は上記の従来装置の欠点を克服するためになされ
たもので、磁気テープや磁気ヘッドの摩耗等を少く抑え
、かつ早送り９巻戻し等の際にも画像を再生することの
できる磁気記録再生装置を提供することを目的とする。Purpose The present invention has been made in order to overcome the drawbacks of the above-mentioned conventional devices, and is capable of minimizing wear on the magnetic tape and magnetic head, and also being able to reproduce images even during fast forwarding and rewinding. The purpose of the present invention is to provide a magnetic recording/reproducing device.
概 要
上記の目的を実現するため本発明は、圧電素子によって
磁気ヘッドを回転ドラムの径方向に移動可能に、すなわ
ち回転ドラムから出没自在に構成することにより、磁気
ヘッドと磁気テープを非接触状態にして通常の早送り２
巻戻しをしたり、接触状態で早送り９巻戻しして画像を
再生したりすることができるようにした磁気記録再生装
置を提供するものである。Summary In order to achieve the above object, the present invention allows the magnetic head to move in the radial direction of the rotating drum using a piezoelectric element, that is, to be able to move in and out of the rotating drum, thereby bringing the magnetic head and magnetic tape into a non-contact state. Normal fast forward 2
To provide a magnetic recording and reproducing device that can rewind and reproduce images by fast forwarding and rewinding nine times in a contact state.
実施例
以下、添付図面のＭ２図乃至第６図を参照して本発明の
いくつかの実施例を説明する。第２図は一実施例のドラ
ムの構成を説明するもので、第２図（ａ）は正面図、第
２図（ｂ）は第２図（ａ）のヂ）部の断面拡大図である
。上ドラム２には矢印３１１Ｌ・方向に変位する積層型
圧電素子２１の一端が固着され、圧電素子２１の他端に
は図示しない接着剤等により支持部材２０が接着されて
いる。そして、支持部材２０には磁気ヘッド５が突出し
た状態で取り付けられている。Embodiments Hereinafter, some embodiments of the present invention will be described with reference to FIGS. M2 to 6 of the accompanying drawings. FIG. 2 illustrates the structure of a drum according to an embodiment, and FIG. 2(a) is a front view, and FIG. 2(b) is an enlarged cross-sectional view of part (a) in FIG. 2(a). . One end of a laminated piezoelectric element 21 that is displaced in the direction of arrow 311L is fixed to the upper drum 2, and the support member 20 is adhered to the other end of the piezoelectric element 21 with an adhesive or the like (not shown). The magnetic head 5 is attached to the support member 20 in a protruding state.
第３図および第４図は積層型圧電素子２１の動作を説明
するもので、第３図は１枚の圧電素子の動作説明図、第
４図はｎ枚積層した圧電素子の動作説明図である。第３
図の如く厚さｔの圧電素子の分極方向に直流電圧Ｖを印
加する。このとき、圧電素子に与えられる電場なＥ１圧
電素子の変位量をＪｔ、圧電歪定数なｄ８１、歪をｓＴ
とすると、３Ｔ＝＝Δｔ／ｌ ＝ ｄ、、・Ｅ＝ｄ、、
・Ｖ／ｉ ・曲間（すΔｔ＝ｔ＠５Ｔ＝ｄ、、−Ｅ・ｔ
＝ｄ、、＊Ｖ ・−・曲・−（２１となる。3 and 4 explain the operation of the laminated piezoelectric element 21. FIG. 3 is an explanatory diagram of the operation of one piezoelectric element, and FIG. 4 is an explanatory diagram of the operation of n piezoelectric elements laminated. be. Third
As shown in the figure, a DC voltage V is applied in the polarization direction of a piezoelectric element having a thickness t. At this time, the electric field applied to the piezoelectric element E1 is the displacement amount of the piezoelectric element Jt, the piezoelectric strain constant d81, and the strain sT.
Then, 3T==Δt/l=d,,・E=d,,
・V/i ・Between songs (Δt=t@5T=d, -E・t
=d,, *V ・-・Song・-(21.
第４図の如く厚さｔの圧電素子をｎ枚積層したものの、
個々の圧電素子に互いに並列に電圧Ｖを印加すると、機
械的な変位ΔＡは直列的に現れて、ΔＱ７−ｎ−Δｔ＝
、９−ｄ、ａ−Ｅ −−−−−−・−・（３）となる。Although n piezoelectric elements of thickness t are laminated as shown in Fig. 4,
When voltage V is applied in parallel to each piezoelectric element, mechanical displacement ΔA appears in series, and ΔQ7−n−Δt=
, 9-d, a-E --------- (3).
但し、Ｊｌ＝ｎ−ｔである。However, Jl=nt.
上記の如く原理によって積層型圧電素子２１の厚みは変
化するので、その一端に支持部材２ｏを介して取り付け
た磁気ヘッド５を回転ドラムの径方向に出没させること
ができる。As described above, since the thickness of the laminated piezoelectric element 21 changes according to the principle, the magnetic head 5 attached to one end of the element via the support member 2o can be moved in and out of the rotating drum in the radial direction.
第５図は本発明の他の実施例の磁気ヘッド付近の拡大断
面図である。上ドラム２には積層型厚みすべり圧電素子
３１が固着され、圧電素子３１の他端ｉ二は支持部材３
０を介して磁気ヘッド５が取り付けられている。この積
層型厚みすさり圧電素子３１は例えば特願昭５８−８６
２９６に開示されているもので、電場を印加すると積層
方向（第５図の矢印５ａの方向）と平行に変位する。こ
のため、第５図に点線Ｑで示す如く磁気ヘッド５を回転
ドラムの径方向に移動させることができる。FIG. 5 is an enlarged sectional view of the vicinity of a magnetic head according to another embodiment of the present invention. A laminated thickness sliding piezoelectric element 31 is fixed to the upper drum 2, and the other end i2 of the piezoelectric element 31 is attached to a support member 3.
A magnetic head 5 is attached via the magnetic head 0. This laminated type thin-thickness piezoelectric element 31 is, for example,
296, which is displaced in parallel to the stacking direction (direction of arrow 5a in FIG. 5) when an electric field is applied. Therefore, the magnetic head 5 can be moved in the radial direction of the rotating drum as shown by the dotted line Q in FIG.
第６図は第２図および第５図に示す実施例の制御回路の
ブロック図である。ＦＦ（早送り）回路５０ａ、ＲＥＶ
（逆戻し）回路５０ｂがオンのときに図示しないスイ
ッチボタン（例えばＦＦボタン）が押されると、圧電素
子駆動回路５１が動作して磁気ヘッドが上ドラムより突
出する。突出が完了すると再生回路５２がオンとなり、
ディスプレイ５３（二よって画像が再生される。FIG. 6 is a block diagram of the control circuit of the embodiment shown in FIGS. 2 and 5. FF (fast forward) circuit 50a, REV
When a switch button (for example, an FF button) not shown is pressed while the (reverse) circuit 50b is on, the piezoelectric element drive circuit 51 operates and the magnetic head protrudes from the upper drum. When the ejection is completed, the regeneration circuit 52 is turned on,
Images are reproduced on the display 53 (2).
そして、更にもう一度オペレータによってスイッチボタ
ンが押されると（他のスイッチボタンを押すようにして
もよい）、再生回路５２がオフ（二なって磁気ヘッドが
ドラム内に収納され、ＦＦ。Then, when the operator presses the switch button again (or presses another switch button), the reproducing circuit 52 is turned off (the magnetic head is stored in the drum and the FF is turned off).
ＲＥＷが継続されることになる。REW will continue.
なお、スイッチボタンが１回押されたときに磁気ヘッド
が収納され、次に押されるときに突出するように構成す
ることもできる。また、磁気ヘッドと磁気テープを接触
させるためのボタンと非接触にさせるボタンを別々のス
イッチボタンとすることもでき、ロータリースイッチ、
２段スイッチとすることもできる。Note that it is also possible to configure the magnetic head to be retracted when the switch button is pressed once and protrude when the switch button is pressed the next time. Also, the button for bringing the magnetic head and magnetic tape into contact and the button for making them non-contact can be separate switch buttons, such as a rotary switch,
It can also be a two-stage switch.
発明の効果
上記の如く本発明によれば、圧電素子によって磁気ヘッ
ドをドラムから出没自在に構成し、早送り、巻戻しのと
きには磁気ヘッドを収納して磁気テープと非接触にした
ので、ヘッド、テープの摩耗等を低く抑えることができ
、また、早送り９巻戻しと共に再像再生が指示されると
きは、磁気ヘッドを突出させて磁気テープと接触させる
ようにしたので、早送り９巻戻しの位置を画像で確認す
ることができる磁気記録再生装置を得ることができる。Effects of the Invention As described above, according to the present invention, the magnetic head is configured to be able to move in and out of the drum using a piezoelectric element, and during fast forwarding and rewinding, the magnetic head is housed and is out of contact with the magnetic tape. In addition, when re-image playback is instructed at the same time as fast-forwarding and rewinding, the magnetic head is made to protrude and come into contact with the magnetic tape. A magnetic recording and reproducing device that can be confirmed with images can be obtained.
第１図は従来装置のドラムの構成図、第２図は本発明の
一実施例のドラムの構成図、第３図および第４図は積層
型圧電素子の説明図、第５図は本発明の池の実施例の磁
気ヘッド付近の拡大図、第６図は第２図および第６図に
示す実施例の制御回路のブロック図である。
１ ・・・・・・・・・ドラム
２ ・・・・・・・・・上ドラム
３ ・・・・・・・・・下ドラム
４．５・・・・・・磁気ヘッド
２０．３０・・・支持部材
２１・・・・・・・・・積層型圧電素子３１・・・・・
・・・・積層型厚みすべり圧電素子第１図
（ＣＩ）
（ｂ）
１
第２図
（ＣＩ）
１
（ｂ）
第３図FIG. 1 is a configuration diagram of a drum of a conventional device, FIG. 2 is a configuration diagram of a drum according to an embodiment of the present invention, FIGS. 3 and 4 are explanatory diagrams of a laminated piezoelectric element, and FIG. 5 is a diagram of the present invention FIG. 6 is an enlarged view of the vicinity of the magnetic head of Noike's embodiment, and is a block diagram of the control circuit of the embodiment shown in FIGS. 2 and 6. 1......Drum 2......Upper drum 3...Lower drum 4.5...Magnetic head 20.30. ...Support member 21...Laminated piezoelectric element 31...
...Laminated thickness shear piezoelectric element Fig. 1 (CI) (b) 1 Fig. 2 (CI) 1 (b) Fig. 3
Claims (1)
前記回転ドラム（二設けられた磁気ヘッドによって前記
磁気テープＣ二側像信号を記舜、再生する磁気記録再生
装置において、 前記磁気ヘッドを前記回転ドラムの径方向に移動可能に
支持する圧電素子と、 少くとも早送り、巻戻しおよび画像再生を指示する指示
手段と、 該指示手段から早送りもしくは巻戻しと画像再生が指示
されたときは前記圧電素子を駆動して前記磁気ヘッドと
磁気テープを接触させ、画像再生が指示されないときは
非接触にさせる制御手段とを備えることを特徴とする磁
気記録再生装置。[Claims] A magnetic tape is wound around a rotating drum at a predetermined angle,
A magnetic recording and reproducing device for recording and reproducing image signals on two sides of the magnetic tape C using two magnetic heads provided on the rotating drum, comprising: a piezoelectric element that supports the magnetic head movably in the radial direction of the rotating drum; , instruction means for instructing at least fast forwarding, rewinding, and image reproduction; and when the instruction means instructs fast forwarding, rewinding, and image reproduction, driving the piezoelectric element to bring the magnetic head and the magnetic tape into contact with each other; 1. A magnetic recording and reproducing apparatus comprising: a control means for making contactless when image reproduction is not instructed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22276083A JPS60115017A (en) | 1983-11-26 | 1983-11-26 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22276083A JPS60115017A (en) | 1983-11-26 | 1983-11-26 | Magnetic recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60115017A true JPS60115017A (en) | 1985-06-21 |
Family
ID=16787471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22276083A Pending JPS60115017A (en) | 1983-11-26 | 1983-11-26 | Magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60115017A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124621A (en) * | 1985-11-25 | 1987-06-05 | Canon Electronics Inc | Recording or reproducing device |
| US5471352A (en) * | 1992-07-21 | 1995-11-28 | Hitachi, Ltd. | Recording/playback apparatus in which head and tape are held in intermittent contact during rapid search |
| JP2007289816A (en) * | 2006-04-21 | 2007-11-08 | Maruyama Mfg Co Ltd | Mounting structure of harness |
-
1983
- 1983-11-26 JP JP22276083A patent/JPS60115017A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124621A (en) * | 1985-11-25 | 1987-06-05 | Canon Electronics Inc | Recording or reproducing device |
| US5471352A (en) * | 1992-07-21 | 1995-11-28 | Hitachi, Ltd. | Recording/playback apparatus in which head and tape are held in intermittent contact during rapid search |
| JP2007289816A (en) * | 2006-04-21 | 2007-11-08 | Maruyama Mfg Co Ltd | Mounting structure of harness |
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