JPH0594682A - Floating magnetic head - Google Patents

Floating magnetic head

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Publication number
JPH0594682A
JPH0594682A JP20095191A JP20095191A JPH0594682A JP H0594682 A JPH0594682 A JP H0594682A JP 20095191 A JP20095191 A JP 20095191A JP 20095191 A JP20095191 A JP 20095191A JP H0594682 A JPH0594682 A JP H0594682A
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JP
Grant status
Application
Patent type
Prior art keywords
slider
magnetic disk
piezoelectric element
magnetic
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
Application number
JP20095191A
Other languages
Japanese (ja)
Inventor
Isao Nakamura
Kazumasa Onishi
功 中村
一正 大西
Original Assignee
Alps Electric Co Ltd
アルプス電気株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date

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Abstract

PURPOSE:To avoid danger of a head crash by inserting a piezoelectric element between a flexure and a slider. CONSTITUTION:The flexure 14 is attached at a tip of a load beam 10 and the piezoelectric element 24 is provided on the flexure 14 and besides the slider 16 having a magnetic core 26 is attached to the piezoelectric element 24 and a magnetic head is composed. At a stopped time of a rotation of a magnetic disk 22, a thickness of the piezoelectric element 24 is shrunk by a voltage impressed on the piezoelectric element 24 and the slider 16 is set at such a position that the slider is not allowed to contact with the magnetic disk 22. Also at an operating time, the magnetic disk 22 rotates at a regular speed and a voltage applied to the piezoelectric element 24 is suppressed by making it coincide with the generation of a high speed of air flow having a sufficient floating force. Thus a contact sliding between the magnetic head and the magnetic disk 22 is eliminated and the damage is avoided.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、磁気ディスクと微小な空間を保って相対移動する浮動式磁気ヘッドに関するものである。 The present invention relates to relates to a floating magnetic head which relatively moves keeping a magnetic disk with a small space.

【0002】 [0002]

【従来の技術】浮動式磁気ヘッドの一従来例を図2に示す。 BACKGROUND ART illustrates an example of a conventional floating magnetic head in Fig. この例の浮動式磁気ヘッドは、磁気ディスクと微小な空間を保って相対移動するもので、ロードビーム10 This example of floating magnetic head, in which relatively moves while maintaining a magnetic disk with a small space, the load beam 10
の先端にフレキシャ14を介して、コイル20の巻回された磁気コア18を有するスライダ16を取り付けてなる。 Tip through the flexure 14, formed by attaching the slider 16 having a magnetic core 18 which is wound a coil 20. 尚、ロードビーム10の他端はマウント12を介してドライブ装置本体のキャリッジ等(図示略)に接続されている。 The other end of load beam 10 is connected through a mount 12 on a carriage or the like of the drive device main body (not shown).

【0003】前記構成の浮動式磁気ヘッドにおいて、磁気ディスクの回転停止時には、ロードビーム10やフレキシャ14が有するばね作用等により、スライダ16は磁気ディスクと接触している。 [0003] In the floating type magnetic head of the configuration, when the rotation stop of the magnetic disk, the spring action and the like included in the load beam 10 and flexure 14, the slider 16 is in contact with the magnetic disk. そして、磁気ディスクが回転することにより、磁気ディスク上には高速空気流が発生し、スライダ16は磁気ディスク上を浮上し、磁気ディスクと微小な空間を保って相対移動し、磁気コア1 By the magnetic disk rotates, a high speed air stream is generated on the magnetic disk, the slider 16 is flying over the magnetic disk, and the relative movement while maintaining a magnetic disk with a small space, the magnetic core 1
8にて磁気記録再生を行なう。 8 performs magnetic recording and reproducing at. そして、磁気ディスクの回転停止と共にスライダ16は再び磁気ディスクに接触する。 Then, the slider 16 contacts the magnetic disk again with rotation stop of the magnetic disk.

【0004】 [0004]

【発明が解決しようとする課題】このようにスライダが磁気ディスク上を浮動する浮動式磁気ヘッドにおいて、 [Problems that the Invention is to Solve In the floating type magnetic head slider thus floats above the magnetic disk,
磁気ディスクが定常速度回転をしているときは、スライダは磁気ディスクと離間しているが、磁気ディスクの回転開始直後や回転停止直前では、気流の発生量が十分ではなく、スライダにはたらく浮上力が小さく、スライダと磁気ディスクが接触し、摺動してしまう。 When the magnetic disk is a steady rate rotation, the slider is separated from the magnetic disk, but the rotation start immediately and rotation stop immediately before the magnetic disk, the amount of air flow is not sufficient, levitation force acting on the slider small, the slider and the magnetic disk are in contact, resulting in sliding. こうした摺動状態は磁気ヘッドや磁気ディスクに破損をもたらすばかりでなく、大切な磁気記録の損失にもなりかねない。 Such a sliding state not only bring damage to the magnetic head and the magnetic disk, could lead to loss of important magnetic recording.
また、極平滑な磁気ディスクに磁気ヘッドが吸着してしまう可能性もあり、この吸着はスライダの浮上姿勢や磁気ディスクの回転を不安定にしてしまうものである。 There is also a possibility that by the magnetic head is adsorbed on very smooth magnetic disk, the suction are those resulting in unstable rotation of the flying posture and magnetic disk slider.

【0005】本発明は前記課題を解決するためになされたもので、フレキシャとスライダの間に圧電素子を設けることで、磁気ヘッドと磁気ディスクの接触を防ぐものである。 [0005] The present invention has been made in order to solve the above problems, by providing a piezoelectric element between the flexure and the slider, it is intended to prevent contact between the magnetic head and the magnetic disk.

【0006】 [0006]

【課題を解決するための手段】本発明の浮動式磁気ヘッドは、ロードビームの先端のフレキシャに磁気コアを有するスライダが設けられている浮動式磁気ヘッドにおいて、フレキシャとスライダの間に圧電素子が介在していることを特徴とするものである。 Means for Solving the Problems] floating magnetic head of the present invention is a floating type magnetic head slider having a magnetic core on the flexure of the tip of the load beam is provided, the piezoelectric element between the flexure and the slider and it is characterized in that it is interposed.

【0007】 [0007]

【作用】フレキシャとスライダの間に設けた圧電素子に電圧を印加することで、圧電素子を伸縮させ、スライダと磁気ディスクの間隔を調整する。 By applying a voltage to a piezoelectric element provided between the [action] flexure and the slider, so as to expand or contract the piezoelectric elements to adjust the distance between the slider and the magnetic disk. 従って、磁気ディスクの回転停止中や磁気ディスクの低速回転中においても、磁気ヘッドと磁気ディスクの接触を妨げ、ヘッドクラッシュを回避できる。 Thus, even during low speed rotation of the rotating stopped and the magnetic disk of the magnetic disk prevents contact between the magnetic head and the magnetic disk can be avoided head crash.

【0008】 [0008]

【実施例】本発明の実施例の浮動式磁気ヘッドを図1に示す。 The floating magnetic head of the embodiment of EXAMPLES The invention is shown in FIG. 図1に示す浮動式磁気ヘッドでは、ロードビーム10の先端にフレキシャ14を取り付け、フレキシャ1 The floating magnetic head shown in FIG. 1, mounting the flexure 14 to the tip of the load beam 10, flexure 1
4には圧電素子24を設け、さらに圧電素子24に磁気コア26を有するスライダ16を取り付けて構成されている。 The 4 a piezoelectric element 24 provided, which is constituted by further attaching a slider 16 having a magnetic core 26 to the piezoelectric element 24. この際、フレキシャ14とロードビーム10の間にさらにアダプタ等の部材が設けられていても本実施例の効果は得られ、本発明の範囲内であることは当然である。 In this case, be provided with a member of the further adapter or the like between the flexure 14 and the load beam 10 the effect of the present embodiment is obtained, it should be understood within the scope of the present invention. アルミニウム等からなるロードビーム10やフレキシャ14は、ばね作用を有し、スライダ16を磁気ディスク22側に押圧する。 The load beam 10 and flexure made of aluminum or the like 14 has a spring action, presses the slider 16 to the magnetic disk 22 side. スライダ16の浮動時には、この押圧力は気流による浮上力とバランスして適性な浮上量を保つ。 Floating when the slider 16, the pressing force keeps the suitability flying height by balancing the floating force by air flow. コイルの巻回された磁気コア26は磁気ヘッドの作動時には磁界を発生し、磁気ディスク22に記録再生を行なう。 The magnetic core 26 wound coil generates a magnetic field during operation of the magnetic head performs recording and reproduction on the magnetic disk 22. 接着剤等でスライダ16に貼着されている薄板状の圧電素子24には磁気ヘッド装置本体に設置される電気回路(図示略)と接続され、圧電素子24に電圧を印加することによって圧電素子24を伸縮する。 The piezoelectric element 24 thin plate that is affixed to the slider 16 with an adhesive or the like is connected to the electrical circuit which is installed in the magnetic head apparatus main body (not shown), the piezoelectric element by applying a voltage to the piezoelectric element 24 to stretch the 24.
この圧電素子24には、チタン酸ジルコン酸鉛(PZ The piezoelectric element 24, lead zirconate titanate (PZ
T)、水晶、リチウムナイオベイト(LiNbO 3 )等を使用することができる。 T), quartz, may be used lithium niobate (LiNbO 3) or the like.

【0009】本実施例の浮動式磁気ヘッドでは、磁気ディスク22の回転停止時には、圧電素子24に電圧を印加して圧電素子24の厚みを収縮させ、スライダ16が磁気ディスク22に接触しないような位置にスライダ1 [0009] In floating magnetic head of the present embodiment, when the rotation stop of the magnetic disk 22, a voltage is applied to the piezoelectric element 24 is contracted to a thickness of the piezoelectric element 24, as the slider 16 is not in contact with the magnetic disk 22 slider to position 1
6を設定する。 Setting the 6. そして、作動時に、磁気ディスク22が定常速度回転をし、十分な浮上力を有する高速空気流の発生に合わせて圧電素子24に印加する電圧を抑える。 Then, during operation, the magnetic disk 22 is constant speed rotation, suppress a voltage applied to the piezoelectric element 24 in accordance with the generation of high velocity air stream having a sufficient floating force.
こうして、有効な浮上量を保って、スライダ16を浮動させる。 Thus, keeping the effective flying height, to float the slider 16. さらに、磁気ディスク22を停止させる時には、高速空気流の減少に合わせて再び圧電素子24に電圧を印加し、圧電素子24の厚みを収縮させて磁気ディスク22の停止時にスライダ16が磁気ディスク22に接触しないようにする。 Further, when stopping the magnetic disk 22, a voltage is applied to the piezoelectric element 24 again in accordance with the decrease in the high-speed air stream, by contracting the thickness of the piezoelectric element 24 on the slider 16 is a magnetic disk 22 at the time of stopping of the magnetic disk 22 so as not to contact. こうして、磁気ディスクの停止時、低速回転時、高速回転時のいづれにおいても磁気ヘッドと磁気ディスク22が接触しないようにできる。 Thus, when the magnetic disk is stopped, during low-speed rotation, it can be such that the magnetic head and the magnetic disk 22 does not come into contact even Izure during high speed rotation. また、磁気ディスク22の回転時において、圧電素子24 Also, during rotation of the magnetic disk 22, the piezoelectric element 24
に印加する電圧を完全に断ち切るのでなく、印加電圧を微妙に調節することで、スライダ16の浮上量の微調整(ナノメータレベル)を可能とする。 Rather than sever completely the voltage applied to the applied voltage by adjusting slightly to allow fine adjustment of the flying height of the slider 16 (nanometer).

【0010】また、磁気ディスク22の回転停止時に圧電素子24に電圧を印加するのでなく、電圧を印加しない状態で、スライダ16が磁気ディスク22と微小な空間を保つように磁気ヘッドの位置を設定し、磁気ディスク22の回転時に圧電素子24に電圧を印加して圧電素子24の厚みを伸長してスライダ16と磁気ディスク2 Further, instead of applying a voltage to the piezoelectric element 24 when the rotation stop of the magnetic disk 22, in a state where no voltage is applied, setting the position of the magnetic head slider 16 is to keep the minute space between the magnetic disk 22 and decompresses the thickness of the piezoelectric element 24 by applying a voltage to the piezoelectric element 24 during rotation of the magnetic disk 22 slider 16 and the magnetic disk 2
2の間の空間を有効な浮上量として、スライダ16を磁気ディスク22上で浮動させることもできる。 The space between the two as an effective flying height, it is also possible to float the slider 16 on the magnetic disk 22.

【0011】スライダ16の実際の浮上量は0.1〜0. [0011] The actual flying height of the slider 16 is 0.1 to 0.
4μmなので、圧電素子24の僅かな厚みの変化で十分に効果ある調整をできるものである。 4μm So those capable of sufficiently effective is adjusted by a slight change in the thickness of the piezoelectric element 24. 従って、本実施例の浮動式磁気ヘッドでは、僅かな電圧を圧電素子に印加することで、スライダと磁気ディスクの間の距離を調節でき、常に磁気ヘッドと磁気ディスクを接触させることがない。 Thus, the floating magnetic head of the present embodiment, by applying a small voltage to the piezoelectric element, can adjust the distance between the slider and the magnetic disk, not always be in contact with the magnetic head and the magnetic disk. よって、磁気ヘッドや磁気ディスクの破損を回避でき、信頼性を高めることができる。 Therefore, it is possible to avoid damage to the magnetic head and the magnetic disk, it is possible to improve the reliability.

【0012】さらに、圧電素子に印加する電圧を調整することでスライダの浮上量の微調整をもできるものである。 Furthermore, those capable of also the fine adjustment of the slider flying height by adjusting the voltage applied to the piezoelectric element.

【0013】さらにまた、圧電素子24に印加する電圧を交流電圧とし、圧電素子24または圧電素子24とスライダ16の複合体の固有振動数の周波数の電流を圧電素子24に流すことで、スライダ16を超音波領域で振動させることができる。 [0013] Furthermore, the AC voltage the voltage applied to the piezoelectric element 24, by flowing a current frequency of the natural frequency of the composite piezoelectric element 24 or the piezoelectric element 24 and the slider 16 to the piezoelectric element 24, the slider 16 it is possible to vibrate in the ultrasonic range. この方法であっても、磁気ヘッドと磁気ディスク22の接触を大幅に回避でき、ヘッドクラッシュの危険性を下げることができる。 Even in this method, the contact between the magnetic head and the magnetic disk 22 can be greatly avoided, it is possible to reduce the risk of a head crash. 特に、磁気ヘッドと磁気ディスクの吸着を防ぐことができ、スライダの浮上姿勢や磁気ディスクの回転の安定度を高めることができる。 In particular, it is possible to it is possible to prevent adsorption of the magnetic head and the magnetic disk, increase the stability of the flying posture and the magnetic disk rotation of the slider.

【0014】 [0014]

【発明の効果】本発明の浮動式磁気ヘッドでは、フレキシャとスライダの間に圧電素子を設け、この圧電素子に電圧を印加することで、スライダと磁気ディスクの間隔を調節でき、磁気ディスクの回転停止時を含め常に磁気ヘッドと磁気ディスクを接触させることがない。 The floating magnetic head of the present invention, the piezoelectric element is provided between the flexure and the slider, by applying a voltage to the piezoelectric element, to adjust the distance between the slider and the magnetic disk, the rotation of the magnetic disk not always be in contact with the magnetic head and the magnetic disk, including when stopped. よって、磁気ヘッドと磁気ディスクが摺動することがなく、 Therefore, without the magnetic head and the magnetic disk slides,
磁気ヘッドや磁気ディスクの破損を回避でき、信頼性を高めることができる。 Avoiding damage to the magnetic head and the magnetic disk, it is possible to improve the reliability.

【0015】さらに圧電素子に印加する電圧を調整することでスライダの浮上量の微調整をもできるものである。 [0015] in which further it may fine adjustment of the slider flying height by adjusting the voltage applied to the piezoelectric element.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本実施例の浮動式磁気ヘッドの側面図である。 1 is a side view of a floating magnetic head of the present embodiment.

【図2】従来例の浮動式磁気ヘッドの斜視図である。 2 is a perspective view of a floating magnetic head of the prior art.

【符号の説明】 DESCRIPTION OF SYMBOLS

14 フレキシャ 16 スライダ 18 磁気コア 22 磁気ディスク 24 圧電素子 26 磁気コア 14 the flexure 16 slider 18 magnetic core 22 magnetic disk 24 piezoelectric elements 26 Magnetic core

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 ロードビームの先端のフレキシャに磁気コアを有するスライダが設けられている浮動式磁気ヘッドにおいて、フレキシャとスライダの間に圧電素子が介在していることを特徴とする浮動式磁気ヘッド。 1. A floating magnetic head in a floating type magnetic head slider is provided with a load beam tip magnetic core flexure of, wherein the piezoelectric element is interposed between the flexure and the slider .
JP20095191A 1991-08-09 1991-08-09 Floating magnetic head Pending JPH0594682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20095191A JPH0594682A (en) 1991-08-09 1991-08-09 Floating magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20095191A JPH0594682A (en) 1991-08-09 1991-08-09 Floating magnetic head

Publications (1)

Publication Number Publication Date
JPH0594682A true true JPH0594682A (en) 1993-04-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP20095191A Pending JPH0594682A (en) 1991-08-09 1991-08-09 Floating magnetic head

Country Status (1)

Country Link
JP (1) JPH0594682A (en)

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GB2334136A (en) * 1996-12-16 1999-08-11 Seagate Technology Bimorph piezoelectric microactuator head and flexure assembly
US6069771A (en) * 1996-11-04 2000-05-30 Seagate Technology, Inc. Gimbal micropositioning device
US6157522A (en) * 1998-04-07 2000-12-05 Seagate Technology Llc Suspension-level microactuator
US6215629B1 (en) 1998-04-16 2001-04-10 Seagate Technology Llc Unitary synchronous flexure microactuator
US6222706B1 (en) 1997-03-31 2001-04-24 Seagate Technology Llc Flexure microactuator
US6233124B1 (en) 1998-11-18 2001-05-15 Seagate Technology Llc Piezoelectric microactuator suspension assembly with improved stroke length
US6268984B1 (en) 1999-01-22 2001-07-31 Seagate Technology Llc Magnet configuration for head-level microactuator
US6289564B1 (en) 1997-08-15 2001-09-18 Seagate Technology Llc Method of making a piezoelectric microactuator for precise head positioning
US6297936B1 (en) 1998-11-09 2001-10-02 Seagate Technology Llc Integral load beam push-pull microactuator
US6298545B1 (en) 1996-11-01 2001-10-09 Seagate Technology Llc Method of making an actuator arm integrated piezoelectric microactuator
US6320730B1 (en) 1998-09-26 2001-11-20 Seagate Technology Llc Low-stress disc drive microactuator cradle
US6351354B1 (en) 1999-05-07 2002-02-26 Seagate Technology Llc Head to flexure interconnection for disc drive microactuator
US6359758B1 (en) 1998-06-11 2002-03-19 Seagate Technology, Llc Rigid body microactuator having elastic joint attachment
US6414822B1 (en) 1998-06-11 2002-07-02 Seagate Technology Llc Magnetic microactuator
US6414823B1 (en) 1999-06-09 2002-07-02 Seagate Technology Llc Coil-structures for magnetic microactuator
US6507463B1 (en) 1999-06-11 2003-01-14 Seagate Technology, Inc. Micro disc drive employing arm level microactuator
US6574077B1 (en) 1999-12-02 2003-06-03 Seagate Technology Llc Microactuator assembly having improved standoff configuration
US6614628B2 (en) 2001-01-19 2003-09-02 Seagate Technology Llc Moving coil micro actuator with reduced rotor mass
US6683758B2 (en) 2000-06-01 2004-01-27 Seagate Technology Llc Fabrication method for integrated microactuator coils
US6683757B1 (en) 2000-04-05 2004-01-27 Seagate Technology Llc Slider-level microactuator for precise head positioning
US6697232B1 (en) 2000-03-24 2004-02-24 Seagate Technology Llc Bonded transducer-level electrostatic microactuator for disc drive system
US6765766B2 (en) 2000-07-11 2004-07-20 Seagate Technology Llc Bonding tub improved electromagnetic microactuator in disc drives
US6778350B2 (en) 2000-10-06 2004-08-17 Seagate Technology Llc Feed forward control of voice coil motor induced microactuator disturbance
US6785086B1 (en) 2000-04-05 2004-08-31 Seagate Technology Llc Transducer-level microactuator with dual-axis control
US6798609B1 (en) 1999-07-28 2004-09-28 Seagate Technology, Inc. Magnetic microactuator with capacitive position sensor
US6831539B1 (en) 2003-08-28 2004-12-14 Seagate Technology Llc Magnetic microactuator for disc with integrated head connections and limiters drives
US6851120B2 (en) 2000-07-13 2005-02-01 Seagate Technology Llc Micro-actuator structure for improved stability
US6963464B2 (en) 2000-10-26 2005-11-08 Hitachi Global Storage Technologies Japan, Ltd. Magnetic head heating element in a disk drive
JP2005346909A (en) * 2004-06-05 2005-12-15 Sae Magnetics Ltd Head gimbal assembly with flying height adjuster, disk drive unit and its manufacturing method
US7151650B2 (en) 2002-02-14 2006-12-19 Samsung Electronics Co., Ltd. Head assembly including a variable device for adjusting an inclination of a slider
US7584034B2 (en) 2005-09-20 2009-09-01 Akira Suzuki Automobile drive recorder

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Publication number Priority date Publication date Assignee Title
US6298545B1 (en) 1996-11-01 2001-10-09 Seagate Technology Llc Method of making an actuator arm integrated piezoelectric microactuator
US6069771A (en) * 1996-11-04 2000-05-30 Seagate Technology, Inc. Gimbal micropositioning device
GB2334136B (en) * 1996-12-16 2001-06-06 Seagate Technology Bimorph piezoelectric microactuator head and flexure assembly
US6108175A (en) * 1996-12-16 2000-08-22 Seagate Technology, Inc. Bimorph piezoelectric microactuator head and flexure assembly
GB2334136A (en) * 1996-12-16 1999-08-11 Seagate Technology Bimorph piezoelectric microactuator head and flexure assembly
US6222706B1 (en) 1997-03-31 2001-04-24 Seagate Technology Llc Flexure microactuator
US6362542B1 (en) 1997-08-15 2002-03-26 Seagate Technology Llc Piezoelectric microactuator for precise head positioning
US6289564B1 (en) 1997-08-15 2001-09-18 Seagate Technology Llc Method of making a piezoelectric microactuator for precise head positioning
US6157522A (en) * 1998-04-07 2000-12-05 Seagate Technology Llc Suspension-level microactuator
US6215629B1 (en) 1998-04-16 2001-04-10 Seagate Technology Llc Unitary synchronous flexure microactuator
US6359758B1 (en) 1998-06-11 2002-03-19 Seagate Technology, Llc Rigid body microactuator having elastic joint attachment
US6414822B1 (en) 1998-06-11 2002-07-02 Seagate Technology Llc Magnetic microactuator
US6320730B1 (en) 1998-09-26 2001-11-20 Seagate Technology Llc Low-stress disc drive microactuator cradle
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