JPH04178979A - Linear drive mechanism - Google Patents
Linear drive mechanismInfo
- Publication number
- JPH04178979A JPH04178979A JP30784290A JP30784290A JPH04178979A JP H04178979 A JPH04178979 A JP H04178979A JP 30784290 A JP30784290 A JP 30784290A JP 30784290 A JP30784290 A JP 30784290A JP H04178979 A JPH04178979 A JP H04178979A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- drive mechanism
- linear drive
- bimorph
- elements
- 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
- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
Landscapes
- Moving Of Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気記録装置に用いられる磁気ヘッドの位置
決めに用いる駆動機構に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive mechanism used for positioning a magnetic head used in a magnetic recording device.
従来の磁気ヘッドの駆動機構は、第５図に示すような構
造であった。回転軸受２５で支持されたアーム４に、磁
気ヘッド３が取り付けられていて、回転軸受２５を中心
として反対側にボイスコイル２６が取り付けられている
。ボイスコイル２６は、磁石２７の磁界中に置かれ位置
決めのための駆動力を発生するボイスコイルモーターを
構成している。A conventional magnetic head drive mechanism has a structure as shown in FIG. A magnetic head 3 is attached to an arm 4 supported by a rotation bearing 25, and a voice coil 26 is attached to the opposite side of the rotation bearing 25. The voice coil 26 constitutes a voice coil motor that is placed in the magnetic field of the magnet 27 and generates a driving force for positioning.
しかし、上記のように構成された磁気ヘッドの駆動機構
では、磁気ヘッド３は回転軸受２５を中心とした円弧状
の運動をして磁気ディスク２上をトラッキングする。磁
気ディスク２の記録トラックに対する磁気ヘッド３の角
度が、トラッキング中宮に変化するので、位置制御上の
問題が生じるそこで、本発明では、このような問題点を
解決するために磁気ヘッド５が、磁気ディスク２に対し
て常に一定の角度で運動する磁気ヘッドのｌＪニア駆動
機構を提供するところにある。However, in the magnetic head drive mechanism configured as described above, the magnetic head 3 moves in an arc around the rotary bearing 25 to track the magnetic disk 2. Since the angle of the magnetic head 3 with respect to the recording track of the magnetic disk 2 changes to the tracking center, a problem arises in position control. Therefore, in the present invention, in order to solve such a problem, the magnetic head 5 is The object of the present invention is to provide an IJ near drive mechanism for a magnetic head that always moves at a constant angle with respect to the disk 2.
本発明の磁気ヘッドのリニア駆動機構は、バイモルフ型
圧電素子を組み合わせて、磁気ディスク上の記録トラッ
クに対して磁気ヘッドが直線運動する軸受機構を構成し
、直線軸受と駆動力発生部を一体としたことを特徴とす
る。The linear drive mechanism for a magnetic head of the present invention combines bimorph piezoelectric elements to constitute a bearing mechanism in which the magnetic head moves linearly with respect to recording tracks on a magnetic disk, and the linear bearing and the driving force generating section are integrated. It is characterized by what it did.
第１図は、本発明の第１の実施例で、磁気ディスク２は
、スピンドル１に取り付けられていて回転可能となって
いる。磁気ヘッド６は、サスペンション１４を介してキ
ャリッジ１０に取り付けられている一０手磁気ディスク
２が所定回転数に達すると磁気ヘッド５が磁気デ／スク
２上で一定間隔を保って動圧効果によって浮上する。FIG. 1 shows a first embodiment of the present invention, in which a magnetic disk 2 is attached to a spindle 1 and is rotatable. The magnetic head 6 is configured such that when the 10-handed magnetic disk 2 attached to the carriage 10 via the suspension 14 reaches a predetermined rotation speed, the magnetic head 5 maintains a constant spacing above the magnetic disk 2 due to the dynamic pressure effect. surface.
キャリッジ１０には、バイモルフ型圧電素子５が４枚、
平行バネ状に取り付けられていて、キャリッジ１０が平
行移動できるようになっている。The carriage 10 includes four bimorph piezoelectric elements 5,
The carriage 10 is attached in the form of a parallel spring so that the carriage 10 can move in parallel.
バイモルフ型圧電素子５が２枚で一対の平行バネを構成
し、これが２対、計４枚のバイモルフ型圧電素子５によ
って一組のリニア駆動機構を構成している。１枚のバイ
モルフ型圧電素子５の変位量には限界があるため、これ
を２枚組み合わせることで、２倍の変位量を得ることが
できる。４枚−組のリニア駆動機構で移動量が不足する
場合は、同一構造の平行バネ機構を２組合わせて２倍の
移動量を得ることができる。更に、５組以上のリニア駆
動機構を組み合わせて大きな移動量を得ることもできる
。Two bimorph piezoelectric elements 5 constitute a pair of parallel springs, and two pairs of bimorph piezoelectric elements 5, a total of four bimorph piezoelectric elements 5, constitute a set of linear drive mechanisms. Since there is a limit to the amount of displacement of one bimorph type piezoelectric element 5, by combining two bimorph type piezoelectric elements 5, twice the amount of displacement can be obtained. If the amount of movement is insufficient with a four-piece linear drive mechanism, double the amount of movement can be obtained by combining two sets of parallel spring mechanisms of the same structure. Furthermore, a large amount of movement can be obtained by combining five or more sets of linear drive mechanisms.
第２図は、本発明の第２の実施例であり、磁気ディスク
２は、スピンドル１に取り付けられて回転可能となって
いる。磁気ヘッド５は、サスペンション１４を介してキ
ャリッジ１０に取り付けられ、同時に、キャリッジ１０
にはバイモルフ型圧電素子５が４枚平行バネ状に取り付
けられていて、キャリッジ１０が平行移動することがで
きる。FIG. 2 shows a second embodiment of the present invention, in which a magnetic disk 2 is attached to a spindle 1 and is rotatable. The magnetic head 5 is attached to the carriage 10 via a suspension 14, and at the same time, the magnetic head 5 is attached to the carriage 10 via a suspension 14.
Four bimorph-type piezoelectric elements 5 are attached in the form of parallel springs to enable the carriage 10 to move in parallel.
更に、キャリッジ１０には軸受１６が取り付けられてい
て、固定軸１７に沿って直線移動でき、バイモルフ型圧
電素子５の平行バネと組み合わせてリニア駆動機構を構
成している。１枚のバイモルフ型圧電素子５の変位量に
は限界があるため、これを２枚組み合わせることで、２
倍の変位量を得ることができる。更に、複数個のバイモ
ルフ型圧電素子５の平行バネ機構を組み合わせて、より
大きな移動量を得ることができる。平行バネ機構とＩＪ
ニア軸受の組み合わせによって、平行バネ機構薬体の
場合よりも、高精度かつ高剛性のリニア駆動機構とする
ことができる。Furthermore, a bearing 16 is attached to the carriage 10 so that it can move linearly along a fixed shaft 17, and in combination with the parallel spring of the bimorph piezoelectric element 5, constitutes a linear drive mechanism. Since there is a limit to the amount of displacement of one bimorph type piezoelectric element 5, by combining two of them, 2
Double the amount of displacement can be obtained. Furthermore, a larger amount of movement can be obtained by combining parallel spring mechanisms of a plurality of bimorph piezoelectric elements 5. Parallel spring mechanism and IJ
The combination of near bearings allows for a linear drive mechanism with higher precision and higher rigidity than in the case of a parallel spring mechanism drug.
また、磁気ヘッド５に代えて光磁気ヘッドを用いること
によって、光磁気記録装置のヘッド移動機構としても用
いることができる。Further, by using a magneto-optical head in place of the magnetic head 5, it can also be used as a head moving mechanism of a magneto-optical recording device.
以上のように実施例において、バイモルフ型圧電素子を
平行バネ状に組み合わせ、更に、リニア軸受と組み合わ
せることで、軸受機構と駆動機構が一体となったリニア
駆動機構を提供することができる。As described above, in the embodiment, by combining bimorph piezoelectric elements in a parallel spring shape and further combining them with a linear bearing, it is possible to provide a linear drive mechanism in which the bearing mechanism and the drive mechanism are integrated.
本発明のリニア駆動機構は、バイモルフ型圧電素子を平
行バネ状に組み合わせることによって、磁気ヘッドが磁
気ディスクに対して直線的に移動し、位置決め制御が容
易であるリニア駆動機構を提供することができる。The linear drive mechanism of the present invention can provide a linear drive mechanism in which the magnetic head moves linearly with respect to the magnetic disk by combining bimorph piezoelectric elements in a parallel spring shape, and positioning control is easy. .
更に、バイモルフ型圧電素子を平行バネ状に組み合わせ
ることで、軸受機構と駆動力の発生機構が一体となった
機構を簡略に構成することができる効果もある。Furthermore, by combining bimorph piezoelectric elements in the form of parallel springs, it is possible to simply construct a mechanism in which a bearing mechanism and a driving force generation mechanism are integrated.
第１図は、本発明の第１の実施例を示す説明図第２図は
、本発明の第２の実施例を示す説明図第５図は、従来の
技術を示す説明図。
１・・・・・・・・・スピンドル
２・・・・・・・・・磁気ディスク
５・・・・・・・・・磁気ヘッド
５・・・・・・・・・バイモルフ型圧電素子１０・・・
・・・・・・キャリッジ
２０・・・・・・・・・シャーシ
第１図
￥２図FIG. 1 is an explanatory diagram showing a first embodiment of the present invention. FIG. 2 is an explanatory diagram showing a second embodiment of the present invention. FIG. 5 is an explanatory diagram showing a conventional technique. 1... Spindle 2... Magnetic disk 5... Magnetic head 5... Bimorph piezoelectric element 10 ...
・・・・・・Carriage 20・・・・・・Chassis Diagram 1￥2 Diagram
Claims (1)
構で、バイモルフ型圧電素子を組み合わせたことを特徴
とするリニア駆動機構。A linear drive mechanism is a mechanism used for positioning a magnetic head in a magnetic recording device, and is characterized by a combination of bimorph piezoelectric elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30784290A JPH04178979A (en) | 1990-11-14 | 1990-11-14 | Linear drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30784290A JPH04178979A (en) | 1990-11-14 | 1990-11-14 | Linear drive mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04178979A true JPH04178979A (en) | 1992-06-25 |
Family
ID=17973850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30784290A Pending JPH04178979A (en) | 1990-11-14 | 1990-11-14 | Linear drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04178979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6760195B2 (en) * | 2000-04-17 | 2004-07-06 | Seagate Technology Llc | Intrinsically excitable actuator assembly |
-
1990
- 1990-11-14 JP JP30784290A patent/JPH04178979A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6760195B2 (en) * | 2000-04-17 | 2004-07-06 | Seagate Technology Llc | Intrinsically excitable actuator assembly |
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