JPS6093616A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPS6093616A JPS6093616A JP20051283A JP20051283A JPS6093616A JP S6093616 A JPS6093616 A JP S6093616A JP 20051283 A JP20051283 A JP 20051283A JP 20051283 A JP20051283 A JP 20051283A JP S6093616 A JPS6093616 A JP S6093616A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- magnetic
- operation mode
- piezoelectric vibrator
- magnetic recording
- 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
-
- 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
- G11B5/54—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 into or out of its operative position or across tracks
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明はビデオテープレコーダ（以下ＶＴＲと略称する
）等の磁気記録再生装置に関し、特に磁気ヘッドおよび
磁気記録媒体の摩耗および損傷を防止する手段の改良に
関する。Detailed Description of the Invention [Technical Field] The present invention relates to a magnetic recording/reproducing device such as a video tape recorder (hereinafter abbreviated as VTR), and particularly relates to improvements in means for preventing wear and damage of a magnetic head and a magnetic recording medium. .
一般にＶＴＲにおいては、動作モードとして記録、再生
、早送り８巻戻し、停止の５つのモードがある。上記５
つのモードのうち、磁気ヘッドと記録媒体としての磁気
テープが接触状態でなければならないのは記録モードと
再生モートだけである。しかしながら、従来のＶＴＲに
おいては他のモードにおいても前記磁気ヘッドと磁気テ
ープとが接触状態となっている。その結果、上記磁気ヘ
ッドや磁気テープに摩耗や損傷を与えていた。たとえば
早送りモードおよび巻戻しモードにおいては、磁気テー
プは記録、再生モードに比べ高速で走行し、さらに磁気
テープの張力は大きくなっているので、磁気ヘッドが著
しく摩耗し、さらには損傷をきたし、磁気ヘッドの寿命
を縮める原因となっていた。また磁気テープも磁気ヘッ
ドとの摩擦により傷が付き、画質の低下を招いていた。In general, VTRs have five operating modes: recording, playback, fast-forwarding, eight-rewinding, and stop. Above 5
Of the two modes, only the recording mode and the reproduction mode require the magnetic head to be in contact with the magnetic tape as a recording medium. However, in conventional VTRs, the magnetic head and magnetic tape are in contact even in other modes. As a result, the magnetic head and magnetic tape are subject to wear and damage. For example, in fast forward mode and rewind mode, the magnetic tape runs at a higher speed than in recording and playback modes, and the tension on the magnetic tape is greater, which can cause significant wear and even damage to the magnetic head. This was a cause of shortening the life of the head. Furthermore, the magnetic tape was also scratched by friction with the magnetic head, resulting in a reduction in image quality.
一方、停止モードにおいては磁気ヘッドが磁気テープの
同一筒所を何度も繰返し走査するので、前記早送り１巻
戻し七−ドと同様に磁気ヘッドの摩耗が激しいうえ、特
に磁気テープの磁性層面が磁気ヘッドにより削り取られ
てしまい磁気テープを使用不能にする等の問題があった
。On the other hand, in the stop mode, the magnetic head repeatedly scans the same position on the magnetic tape over and over again, which causes severe wear on the magnetic head, as in the case of the fast-forward, rewind, and seven-speed modes. There was a problem in that the magnetic tape was scraped off by the magnetic head, making the magnetic tape unusable.
なお、上記停止モードにおいては磁気テープの張力を弱
め接触圧を小さくするようにした装置が実用に供されて
いるが、完全な非接触状態となるわけではないので前述
した磁気ヘッドの摩耗等を完全′に防ぐまでには至って
いない。In addition, in the above-mentioned stop mode, there is a device in practical use that weakens the tension of the magnetic tape and reduces the contact pressure, but this does not result in a completely non-contact state, so it is necessary to prevent wear of the magnetic head as described above. It has not yet been completely prevented.
本発明の目的は、磁気記録再生装置本体の動作モードの
うち記録モードおよび再生モード以外の動作モードにお
いては磁気ヘッドと磁気テープとを非接触状態とし、磁
気ヘッドおよび磁気テープの摩耗および損傷を防止する
ことのできる磁気記録再生装置を提供することにある。An object of the present invention is to prevent the magnetic head and the magnetic tape from coming into contact with each other in operating modes other than the recording mode and the playback mode of the main body of a magnetic recording/reproducing apparatus, thereby preventing wear and damage to the magnetic head and the magnetic tape. The object of the present invention is to provide a magnetic recording and reproducing device that can perform the following functions.
本発明は上記目的を達成するために次の如く構成したこ
とを特徴としている。すなわち、磁気記録媒体に接触可
能に設けられた磁気ヘッドとこの磁気ヘッドを支持する
磁気ヘッド支持体との間に圧電素子を変位素子とした磁
気ヘッド変位装置を介挿すると共に、磁気記録再生装置
本体の動作モードを動作モード弁別装置により弁別し、
この弁別装置から発する動作モード信号に基いて前記磁
気ヘッド変位装置を動作させることにより、前記磁気ヘ
ッドを前記動作モードに応じて前記磁気記す
録媒体に接触酔暗る第１の位置と前記磁気記録媒体に接
触しない第２の位置とに変位させるようにしたことを特
徴としている。In order to achieve the above object, the present invention is characterized by the following configuration. That is, a magnetic head displacement device using a piezoelectric element as a displacement element is inserted between a magnetic head provided so as to be able to contact a magnetic recording medium and a magnetic head support supporting the magnetic head, and a magnetic recording/reproducing device The operation mode of the main body is discriminated by an operation mode discriminator,
By operating the magnetic head displacement device based on the operation mode signal emitted from the discrimination device, the magnetic head is moved to the first position where the magnetic recording medium is magnetically recorded and the magnetic recording medium according to the operation mode. It is characterized in that it is displaced to a second position where it does not come into contact with the medium.
なお前記磁気ヘッド変位装置としては、たとえば電極面
と平行な方向に分極軸を有する複数個の厚みすべり圧電
振動子を分極軸が平行となるように積層して積層体とな
し、この積層体の一端面を前記磁気ヘッド支持体に固定
し他端面に前記磁気ヘッドを取付け、前記各圧電振動子
に信号電圧を印加することにより、上記磁気ヘッドを前
記各圧電振動子の１へり方向と同一方向に変位させ、上
記第１および第２の位置間の変位を得るように構成した
ものを用いることが望ましい。The magnetic head displacement device may be constructed by laminating a plurality of thickness-shear piezoelectric vibrators, each having their polarization axes in a direction parallel to the electrode surface, so that their polarization axes are parallel to each other to form a laminate. One end surface is fixed to the magnetic head support, the magnetic head is attached to the other end surface, and a signal voltage is applied to each piezoelectric vibrator, so that the magnetic head is moved in the same direction as one edge direction of each piezoelectric vibrator. It is desirable to use a device configured to obtain a displacement between the first and second positions.
〔実施例）
第１図は本弁明をヘリカルスキャン２ヘツド型ＶＴＲに
適用した一実施例を示す概略構成図で、図中１１は回転
トラム、１２は固定ドラム、１３は回転シャツ１−であ
る。上記回転ドラム１１と固定ドラム１２どの間にはド
ラム円周方向へ互いに１８０位置をずらして一対の磁気
ヘッド１４が設けられている。上記磁気ヘッド１４は後
述する磁気ヘッド変位装置によって記録、再生モード時
には回転ドラム１１．固定ドラム１２の外周面から僅か
に突出する如く変位するものとなっている。[Embodiment] Fig. 1 is a schematic configuration diagram showing an embodiment in which the present invention is applied to a helical scan two-head type VTR. In the figure, 11 is a rotating tram, 12 is a fixed drum, and 13 is a rotating shirt 1-. . A pair of magnetic heads 14 are provided between the rotating drum 11 and the stationary drum 12, 180 degrees apart from each other in the circumferential direction of the drum. The magnetic head 14 is moved to the rotating drum 11 during recording and reproduction mode by a magnetic head displacement device to be described later. It is displaceable so as to slightly protrude from the outer peripheral surface of the fixed drum 12.
上記磁気ヘッド変位装置には、ヘッド変位制御回路１５
から供給される磁気記録再生装置本体の動作モードに応
じた信号電圧が固定ドラム１２側から与えられるものと
なっている。なお回転ドラム１１、固定ドラム１２には
図示はしてないが、磁気記録媒体としての磁気テープが
斜めに巻回されかつ走行するものとなっており、その際
磁気ヘッド１４により画像情報の記録再生が行なわれる
ものとなっている。The magnetic head displacement device includes a head displacement control circuit 15.
A signal voltage corresponding to the operation mode of the main body of the magnetic recording/reproducing apparatus is supplied from the fixed drum 12 side. Although not shown on the rotating drum 11 and fixed drum 12, magnetic tape as a magnetic recording medium is wound diagonally and runs, and at this time, a magnetic head 14 records and reproduces image information. is to be carried out.
第２図は第１図のドラム部分を一部切断して示す部分断
面図である。第２図において、１６は前述した磁気テー
プであり、この磁気テープ１６の記録面に対し磁気ヘッ
ド１４の先端が接触可能に設けられている。磁気ヘッド
１４は磁気ヘッド変位装置としての厚みすべり圧電振動
子積層体１７の一端に接着材（不図示）等により取付け
られている。上記厚みすべり圧電振動子積層体１７の他
端は磁気ヘッド支持体としてのヘッドパー１８により支
持されている。FIG. 2 is a partial cross-sectional view of the drum portion of FIG. 1, partially cut away. In FIG. 2, reference numeral 16 denotes the aforementioned magnetic tape, and the tip of the magnetic head 14 is provided so as to be able to come into contact with the recording surface of the magnetic tape 16. The magnetic head 14 is attached to one end of a thickness-shear piezoelectric vibrator laminate 17 as a magnetic head displacement device using an adhesive (not shown) or the like. The other end of the thickness-shear piezoelectric vibrator laminate 17 is supported by a head par 18 as a magnetic head support.
第３図は上記磁気ヘッド１４．厚みすべり圧電振動子積
層体１７．ヘッドパー１８の部分を取出して示した斜視
図である。この第３図に示すように厚みすべり圧電振動
子積層体１７には端子１９゜２０から制御信号電圧が印
加されるものとなっている。またヘッドパー１８の基端
部には回転シャフト１３へ嵌合固定される穴１８ａがあ
けである。FIG. 3 shows the magnetic head 14. Thickness-slip piezoelectric vibrator laminate 17. It is a perspective view showing a portion of the head par 18 taken out. As shown in FIG. 3, a control signal voltage is applied to the thickness-slip piezoelectric vibrator laminate 17 from terminals 19 and 20. As shown in FIG. Further, a hole 18a is provided at the base end of the head par 18 to be fitted and fixed to the rotating shaft 13.
第４図〜第６図は上記厚みすべり圧電振動子積層体１７
の構成を示す図である。第４図に示すように積層体１７
は複数個の厚みすべり圧電振動子２１．２２〜２ｎを積
層したものとなっている。4 to 6 show the thickness-slip piezoelectric vibrator laminate 17.
FIG. As shown in FIG.
is a stack of a plurality of thickness-shear piezoelectric vibrators 21, 22 to 2n.
上記各圧電振動子２１．２２〜２ｎは圧電セラミクスノ
両側面に電極板３１ ａ、３１ ｂ、３２ａ。Each of the piezoelectric vibrators 21, 22 to 2n has electrode plates 31a, 31b, and 32a on both sides of the piezoelectric ceramic.
３２ｂ〜３ｎａ、３ｎｂをそれぞれ付設したものとなっ
ており、電極面と平行な方向に分極軸を有している。な
お本実施例では、分極軸の方向が矢印で示すように電極
面と平行でかつ交互に異なる方向を向くように配設され
ている。なお第４図中４１．４２〜４ｎ＋１は各電極板
に添設した電極引出し導体であり、電気回路的には第５
図に示すように一つおきに共通接続され、端子１９．２
０にそれぞれ一括接続しである。32b to 3na and 3nb, respectively, and have polarization axes in a direction parallel to the electrode surface. In this embodiment, the polarization axes are arranged parallel to the electrode surface and facing alternately different directions as shown by the arrows. Note that 41.42 to 4n+1 in Fig. 4 are electrode lead-out conductors attached to each electrode plate, and in terms of the electrical circuit,
As shown in the figure, every other terminal is connected in common, and terminals 19.2
0 and connect them all at once.
そこで今、信号電圧印加端子１９．２０に電源５０から
電圧Ｖを印加すると、第６図に示すよう ・に各圧電振
動子には主振動モードとして破線で示すような「厚みす
べり振動」が励起されることになり、
ｙｏｃｄｌ ｓ Ｖ （ｄｔ’ｓは圧電定数）なる変位
量が上記圧電振動子の長手方向に生じる。Now, when voltage V is applied from the power supply 50 to the signal voltage application terminals 19 and 20, as shown in Fig. 6, "thickness shear vibration" as shown by the broken line is excited in each piezoelectric vibrator as the main vibration mode. As a result, a displacement amount of yocdl s V (dt's is a piezoelectric constant) occurs in the longitudinal direction of the piezoelectric vibrator.
なお第６図中、矢印５１は分極軸を示しており、矢印５
２は電界方向を示している。かくして積層体１７には電
圧Ｖに比例した変位が生じ、磁気ヘッド１４を磁気チー
１１６に接触する第１の位置および磁気テープ１６に接
触しない第２の位置へ変位させることができる。Note that in FIG. 6, arrow 51 indicates the polarization axis;
2 indicates the direction of the electric field. In this way, a displacement proportional to the voltage V is generated in the laminated body 17, and the magnetic head 14 can be displaced to a first position where it contacts the magnetic chip 116 and a second position where it does not come into contact with the magnetic tape 16.
第７図（ａ）は上述した磁気ヘッド１４の第１の位置へ
の変位により、磁気ヘッド１４の先端が磁気チー７１６
に接触した状態を示す平面図であり、同図（ｂ）は磁気
ヘッド１４の第２の位置への変位により磁気ヘッド１４
の先端が磁気テープ１６から離間した状態を示す平面図
である。FIG. 7(a) shows that the tip of the magnetic head 14 is moved to the magnetic tip 716 due to the above-mentioned displacement of the magnetic head 14 to the first position.
2 is a plan view showing a state in which the magnetic head 14 is in contact with the magnetic head 14 due to the displacement of the magnetic head 14 to the second position. FIG.
FIG. 3 is a plan view showing a state in which the leading end of the magnetic tape 16 is separated from the magnetic tape 16;
第８図はヘッド変位制御回路１５の構成をその周辺部と
共に示した電気回路ブロック図である。FIG. 8 is an electric circuit block diagram showing the configuration of the head displacement control circuit 15 along with its peripheral parts.
図中６１は操作者の操作に基いてＶ、 Ｔ Ｒ本体の動
作モード設定を行なう操作機構であり、６２（ま動結合
され、ＶＴＲ本体の動作モードを弁別し、その動作モー
ドを示す動作モード信号をスイッチ機構６３に与える。In the figure, reference numeral 61 denotes an operation mechanism that sets the operation mode of the VTR main body based on the operator's operation, and 62 (an operation A signal is given to the switch mechanism 63.
スイッチ機構６３は上記動作モード信号に基いてＯＮ、
ＯＦＦ動作し、記録および再生モード信号の場合には電
？１ｉ６４からの直流電圧をスリッピングＩｆｉｌｆｌ
１６５を介して前記厚みすべり圧電振動子積層体１７へ
供給し、それ以タトの動作モード信号の場合には上記電
源供給を停止する。スリッピング機構６５は駆動モータ
６６にこより回転駆動される前記回転ドラム１１に設け
たスリップリング８１．８２と前記固定ドラム１２に設
けたブラシＢｌ、Ｂ２とを摺動自在に配置した導電機構
であり、スリップリング８１．８２を厚みすべり圧電振
動子積層体１７の端子１９．２０に接続し、ブラシ８１
．８２をスイッチ機構６３の出力端に接続している。The switch mechanism 63 is turned on and off based on the operation mode signal.
OFF operation, no power in case of recording and playback mode signal? Ifilfl slipping DC voltage from 1i64
165 to the thickness-slide piezoelectric vibrator stack 17, and thereafter, in the case of a continuous operation mode signal, the power supply is stopped. The slipping mechanism 65 is a conductive mechanism in which slip rings 81 and 82 provided on the rotary drum 11, which is rotationally driven by a drive motor 66, and brushes B1 and B2 provided on the fixed drum 12 are slidably arranged. , the slip rings 81 and 82 are connected to the terminals 19 and 20 of the thickness-sliding piezoelectric vibrator laminate 17, and the brush 81
．． 82 is connected to the output end of the switch mechanism 63.
そこで今、操作者が操作機構６１によってＶＴＲ本体の
動作モードを記録または再生モードに設定すると、動作
モード弁別装置６２はその記録または再生モードを弁別
し、弁別した動作モード信号をスイッチ機構６３に与え
る。上記動作モード信号を受けたスイッチ機構６３はＯ
Ｎ動作し電源６４からの直流信号電圧をスリッピング機
構６５を介して厚みすべり圧電振動子積層体１７に印加
供給する。その結果、前記磁気ヘッド１４は第７図（ａ
）の如く磁気テープ１６に接触し、記録または再生が可
能となる。なお本実施例における再生モードには、いわ
ゆるスロー再生、スチル再生。Now, when the operator sets the operation mode of the VTR main body to recording or playback mode using the operation mechanism 61, the operation mode discriminator 62 discriminates the recording or playback mode and provides the discriminated operation mode signal to the switch mechanism 63. . The switch mechanism 63 receiving the above operation mode signal is
N operation is performed, and a DC signal voltage from the power source 64 is applied and supplied to the thickness-slip piezoelectric vibrator laminate 17 via the slipping mechanism 65. As a result, the magnetic head 14 as shown in FIG.
), it comes into contact with the magnetic tape 16 to enable recording or reproduction. Note that the playback modes in this embodiment include so-called slow playback and still playback.
早送り再生および巻戻し再生等も含まれる。This also includes fast-forward playback, rewind playback, etc.
次に、操作者が操作機構６１によって早送り。Next, the operator performs fast forwarding using the operating mechanism 61.
巻戻し、停止モードのいずれかに設定すると、動作モー
ド弁別装置１１６２はこれらの各モードに応じた動作モ
ード信号をスイッチ機構６３に与える。When set to either the rewind mode or the stop mode, the operation mode discriminator 1162 provides the switch mechanism 63 with an operation mode signal corresponding to each of these modes.
そうすると、スイッチ機構６３はＯＦＦ動作し、電源６
４からの直流信号電圧を断つ。その結果、磁気ヘッド１
４は第７図（ｂ）の如く磁気テープ１６から離間して非
接触状態となる。かく豐て磁気ヘッド１４と磁気テープ
１６との摩擦が全くなくなり、磁気ヘット１４と磁気チ
ー１１６の摩耗および損傷を生じさＵずに、早送り２巻
戻しおよび停止が可能となる。Then, the switch mechanism 63 turns OFF, and the power supply 6
Cut off the DC signal voltage from 4. As a result, the magnetic head 1
4 is separated from the magnetic tape 16 and is in a non-contact state as shown in FIG. 7(b). In this way, there is no friction between the magnetic head 14 and the magnetic tape 16, and fast forwarding, rewinding, and stopping are possible without causing wear or damage to the magnetic head 14 and magnetic tape 116.
なお本発明は上述しＩ〔一実施例に限定されるものでは
ない。たとえば上記実施例においては、磁気ヘッド１４
を取ＩＨｊた厚みすべり圧電振動子積層体１７を磁気ヘ
ッド支持体としてのヘッドパー１８に取付け、これを回
転シャフト１３に固定することにより回転駆動するよう
に構成したが、第９図に示す如く前記厚みすべり圧電振
動子積層体１７を回転ドラム１１の端面に接着材等で直
接固定することにより回転駆動するようにしてもよい。Note that the present invention is not limited to the above-mentioned embodiment. For example, in the above embodiment, the magnetic head 14
A sliding piezoelectric vibrator laminate 17 with a thickness of IHj is attached to a head par 18 serving as a magnetic head support, and is configured to be rotationally driven by fixing it to a rotating shaft 13. As shown in FIG. The thickness-shear piezoelectric vibrator laminate 17 may be directly fixed to the end surface of the rotating drum 11 with an adhesive or the like to be driven to rotate.
また磁気ヘッド変位装置の変位素子として厚みすべり圧
電振動子を用いたが、バイモルフ型圧電素子でもよく要
は信号電圧に応じて変位する圧電素子！であればどのよ
うなものであってもよい。In addition, although a thickness-shear piezoelectric vibrator was used as the displacement element of the magnetic head displacement device, a bimorph type piezoelectric element may also be used.The point is that the piezoelectric element is displaced according to the signal voltage! It can be anything.
本発明によれば、磁気記録媒体に接触可能に設けられた
磁気ヘッドとこの磁気ヘッドを支持する磁気ヘッド支持
体との間に圧電素子を変位素子とした磁気ヘッド変位装
置を介挿すると共に、磁気記録再生装置本体の動作モー
ドを動作モード弁別装置により弁別し、この弁別装置か
ら発する動作モード信号に基いて前記磁気ヘッド変位装
置を動作させることにより、前記磁気ヘッドを前記動作
モードに応じて前記磁気記録媒体に接触させる第１の位
置と前記磁気記録媒体に接触しない第２の位置とに変位
させるようにしたので、磁気記録再生装置の動作モード
のうち記録再生モード以外の動作モードにおいては磁気
ヘッドと磁気テープとを非接触状態となし得、磁気ヘッ
ドおよび磁気テープの摩耗および損傷を防止することの
できる磁気記録再生装置を提供できる。According to the present invention, a magnetic head displacement device including a piezoelectric element as a displacement element is inserted between a magnetic head that is provided so as to be able to contact a magnetic recording medium and a magnetic head support that supports the magnetic head, and The operation mode of the main body of the magnetic recording and reproducing apparatus is discriminated by an operation mode discriminator, and the magnetic head displacement device is operated based on an operation mode signal emitted from the discriminator, so that the magnetic head is moved according to the operation mode. Since the displacement is made between a first position where it contacts the magnetic recording medium and a second position where it does not come into contact with the magnetic recording medium, the magnetic It is possible to provide a magnetic recording/reproducing device in which the head and the magnetic tape can be brought into a non-contact state, and wear and damage to the magnetic head and the magnetic tape can be prevented.
第１図〜第８図は本発明をヘリカルスキャン２ヘツド型
Ｖ Ｔ Ｒに適用した一実施例を示す図で、第１図は概
略的構成を示す全体図、第２図は第１図のドラム部分を
一部切断して示す部分断面図、第３図は磁気ヘッド変位
装置の外観を示す斜視図、第４図〜第６図は厚みすべり
圧電振動子積層体の構成を示す図、第７図（ａ）（ｂ）
は磁気ヘッドと磁気テープとの位置関係を示す図、第８
図は同実施例の電気的構成を示すブロック図、第９図は
本発明の他の実施例の要部断面図である。
１１・・・回転ドラム、１２・・・固定ドラム、１３・
・・回転シャフト、１４・・・磁気ヘッド、１６・・・
磁気テープ、１７・・・厚みすべり圧電振動子積層体、
１８・・・ヘッドバー、１９．２０・・・信号電圧印加
端子、２１．２２〜２ｎ・・・厚みすべり圧電振動子、
３１ａ、 ３ ｌ ｂ 〜３ ｎ ａ、 ３ ｎ ｂ−
・・電極板、４１．４２〜４ｎ＋１・・・電極引出し導
体、５０・・・電源、６５・・・スリッピング機構。
第１図
３
第２図1 to 8 are diagrams showing an embodiment in which the present invention is applied to a helical scan two-head type VTR. FIG. 1 is an overall view showing a schematic configuration, and FIG. FIG. 3 is a perspective view showing the external appearance of the magnetic head displacement device; FIGS. 4 to 6 are views showing the structure of a thickness-shear piezoelectric vibrator laminate; Figure 7 (a) (b)
8 is a diagram showing the positional relationship between the magnetic head and the magnetic tape.
The figure is a block diagram showing the electrical configuration of the same embodiment, and FIG. 9 is a sectional view of a main part of another embodiment of the present invention. 11... Rotating drum, 12... Fixed drum, 13.
...Rotating shaft, 14...Magnetic head, 16...
Magnetic tape, 17...Thickness-slip piezoelectric vibrator laminate,
18... Head bar, 19.20... Signal voltage application terminal, 21.22-2n... Thickness sliding piezoelectric vibrator,
31a, 3 l b ~3 n a, 3 n b-
...Electrode plate, 41.42-4n+1... Electrode lead conductor, 50... Power supply, 65... Slipping mechanism. Figure 1 3 Figure 2
Claims (2)
と、この磁気ヘッドを支持する磁気ヘッド支持体と、磁
気記録再生装置本体の動作モードを弁別して動作モード
信号を発する動作モード弁別装置と、この動作モード弁
別装置から発した動作モード信号に基いて前記磁気ヘッ
ドを前記磁気記録媒体に対して接触状態となる第１の位
置と前記磁気記録媒体に対して非接触状態となる第２の
位置とに変位させる如く前記磁気ヘッドと磁気ヘッド支
持体との間に介挿された圧電素子を変位素子とした磁気
ｌ＼ラッド位装置とを具備したことを特徴とづる磁気記
録再生装置。(1) A magnetic head provided so as to be able to come into contact with a magnetic recording medium, a magnetic head support that supports the magnetic head, and an operation mode discrimination device that discriminates the operation mode of the main body of the magnetic recording and reproducing apparatus and issues an operation mode signal. , a first position where the magnetic head is in contact with the magnetic recording medium and a second position where the magnetic head is out of contact with the magnetic recording medium based on the operational mode signal emitted from the operational mode discriminator. 1. A magnetic recording/reproducing apparatus comprising: a magnetic l\\rad position device using a piezoelectric element as a displacement element, which is inserted between the magnetic head and a magnetic head support so as to displace the magnetic head to a position.
極軸を有づ′る複数個の厚みすべり圧電振動子を分極軸
が平行どなるように積層して積層体となし、この積層体
の一端面を磁気ヘッド支持体に固定し他端面に磁気ヘッ
トを取付け、前記各圧電振動子に信号電圧を印加するこ
とにより、前記磁気ヘッドを前記各圧電振動子のすべり
方向と同一方向に変位させ、第１の位置と第２の位置と
の間の変位を得るように構成したものであることを特徴
とする特許請求の範囲第（１）項記載の磁気記録再生装
置。(2) A magnetic head displacement device is constructed by laminating a plurality of thickness-shear piezoelectric vibrators whose polarization axes are parallel to the electrode planes so that their polarization axes are parallel to each other to form a laminate. One end surface is fixed to a magnetic head support, a magnetic head is attached to the other end surface, and a signal voltage is applied to each piezoelectric vibrator to displace the magnetic head in the same direction as the sliding direction of each piezoelectric vibrator. The magnetic recording and reproducing apparatus according to claim 1, wherein the magnetic recording and reproducing apparatus is configured to obtain a displacement between a first position and a second position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20051283A JPS6093616A (en) | 1983-10-26 | 1983-10-26 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20051283A JPS6093616A (en) | 1983-10-26 | 1983-10-26 | Magnetic recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6093616A true JPS6093616A (en) | 1985-05-25 |
Family
ID=16425540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20051283A Pending JPS6093616A (en) | 1983-10-26 | 1983-10-26 | Magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093616A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124621A (en) * | 1985-11-25 | 1987-06-05 | Canon Electronics Inc | Recording or reproducing device |
| JPH0310337U (en) * | 1989-06-12 | 1991-01-31 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5473616A (en) * | 1977-11-24 | 1979-06-13 | Hitachi Denshi Ltd | Magnetic head protective device |
-
1983
- 1983-10-26 JP JP20051283A patent/JPS6093616A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5473616A (en) * | 1977-11-24 | 1979-06-13 | Hitachi Denshi Ltd | Magnetic head protective device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124621A (en) * | 1985-11-25 | 1987-06-05 | Canon Electronics Inc | Recording or reproducing device |
| JPH0310337U (en) * | 1989-06-12 | 1991-01-31 |
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