JPH087857B2 - Head support device - Google Patents
Head support deviceInfo
- Publication number
- JPH087857B2 JPH087857B2 JP62290330A JP29033087A JPH087857B2 JP H087857 B2 JPH087857 B2 JP H087857B2 JP 62290330 A JP62290330 A JP 62290330A JP 29033087 A JP29033087 A JP 29033087A JP H087857 B2 JPH087857 B2 JP H087857B2
- Authority
- JP
- Japan
- Prior art keywords
- flexible body
- support
- polymer resin
- magnetic head
- resin plate
- 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.)
- Expired - Lifetime
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 51
- 239000002952 polymeric resin Substances 0.000 claims description 49
- 239000000463 material Substances 0.000 claims description 46
- 239000004020 conductor Substances 0.000 claims description 36
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 12
- 239000002184 metal Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、ヘッド支持装置に関し、支持体の自由端に
可撓体を取付け、荷重用突起により支持体の自由端から
可撓体へ荷重力を伝えるようにし、スライダに読み書き
素子を担持させた磁気ヘッドを、可撓体の下面に取付け
たヘッド支持装置において、可撓体を、配線用導体を有
する高分子樹脂板材で構成し、この高分子樹脂板の導体
を磁気ヘッドの読み書き素子の電極部に電気的に接続さ
せると共に、高分子樹脂板材を、支持体に沿って長さ方
向に導出することにより、磁気ヘッドに対するリード線
配線構造を簡単化すると共に、磁気ヘッドに対するリー
ド線のバネ性の影響を小さくし、磁気ヘッドを小型化し
て浮上量を低減させ、磁気記録の高密度化を図った場合
にも、安定した姿勢制御作用が得られるようにしたもの
である。Description: TECHNICAL FIELD The present invention relates to a head support device, in which a flexible body is attached to a free end of a support body, and a load protrusion is used to load the flexible body from the free end of the support body. In a head support device in which a magnetic head for transmitting and receiving a read / write element on a slider is attached to the lower surface of a flexible body, the flexible body is made of a polymer resin plate material having a wiring conductor. Lead wire wiring structure for the magnetic head by electrically connecting the conductor of the polymer resin plate to the electrode part of the read / write element of the magnetic head and drawing out the polymer resin plate along the support in the longitudinal direction. In addition to simplifying the magnetic head, the effect of the springiness of the lead wire on the magnetic head is reduced, the magnetic head is downsized, the flying height is reduced, and the stable attitude control action is achieved even when the density of magnetic recording is increased. It is obtained by thus obtained.
＜従来の技術＞ この種のヘッド支持装置において、磁気ヘッドが磁気
ディスク面を一定の間隔をおいて近接して追従し得るよ
うにするためには、読み書き素子を担持するスライダが
第１軸に関してピッチ運動を行ない、第１軸と直交する
第２軸に関してロール運動を行なうようにすること、偏
揺れを除去すること等が要求される。このようなヘッド
支持装置は、例えば特公昭58−22827号公報、特開昭61
−93868号公報等で公知である。<Prior Art> In a head supporting device of this type, in order to allow a magnetic head to closely follow a magnetic disk surface at a constant interval, a slider carrying a read / write element is attached with respect to a first axis. It is required to perform a pitch movement, perform a roll movement about a second axis orthogonal to the first axis, remove yaw, and the like. Such a head support device is disclosed, for example, in Japanese Patent Publication No. 58-22827 and Japanese Patent Laid-Open No. 61-61.
It is publicly known in, for example, Japanese Patent Publication No. 93868.
第８図は従来のヘッド支持装置と磁気ディスクとの関
係を示す平面図、第９図は同じくその正面図で、１は磁
気ディスク、２はヘッド支持装置である。磁気ディスク
１は、図示しない回転駆動機構により、矢印ａの方向に
回転駆動される。ヘッド支持装置２は、図示しない位置
決め機構により磁気ディスク１の回転直径O1上で、矢印
b1またはb2の方向に直線的に駆動されて位置決めされ、
それによって、所定のトラックにおいて、磁気ディスク
１への書き込み及び磁気ディスク１からの読み出しが行
なわれる。FIG. 8 is a plan view showing the relationship between a conventional head support device and a magnetic disk, FIG. 9 is a front view of the same, and 1 is a magnetic disk and 2 is a head support device. The magnetic disk 1 is rotationally driven in the direction of arrow a by a rotational driving mechanism (not shown). The head support device 2 is moved by the positioning mechanism (not shown) on the rotation diameter O 1 of the magnetic disk 1,
linearly driven and positioned in the direction of b 1 or b 2 ,
As a result, writing to the magnetic disk 1 and reading from the magnetic disk 1 are performed in a predetermined track.
ヘッド支持装置２は、位置決め機構に取付けられる剛
性アーム21に、ステンレス薄板等の弾性金属薄板でなる
支持体22の一端をネジ等の結合具211、212によって取付
け固定すると共に、支持体22の長手方向の一端にある自
由端に可撓体23を取付け、この可撓体23の下面に磁気ヘ
ッド24を取付けた構造となっている。The head support device 2 attaches and fixes one end of a support body 22 made of an elastic metal thin plate such as a stainless steel thin plate to a rigid arm 21 attached to a positioning mechanism by using coupling tools 211 and 212 such as screws, and lengthwise the support body 22. A flexible body 23 is attached to a free end at one end in the direction, and a magnetic head 24 is attached to a lower surface of the flexible body 23.
支持体22は、剛性アーム21に取付けられる部分が弾性
バネ部221となっていて、この弾性バネ部221に連続して
剛性ビーム部222を形成してある。剛性ビーム部222は両
側に折曲げ形成したフランジ222a、222bを有し、磁気デ
ィスク１に磁気ヘッド24を押付ける荷重力を与える。The supporting body 22 has an elastic spring portion 221 at a portion attached to the rigid arm 21, and a rigid beam portion 222 is formed continuously with the elastic spring portion 221. The rigid beam part 222 has flanges 222a and 222b formed by bending on both sides, and applies a load force for pressing the magnetic head 24 to the magnetic disk 1.
第10図は従来のヘッド支持装置の要部における拡大平
面図、第11図は同じく正面図である。可撓体23は、ステ
ンレス板等の弾性金属板を使用し、支持体22の長手方向
軸線と略平行して伸びる２つの外側可撓性枠部231、232
と、支持体22から離れた端において外側可撓性枠部23
1、232を連結する横枠233と、横枠233の略中央部から外
側可撓性枠部231、232に略平行するように延びていて、
先端を自由端とした中央舌状部234とを有して構成さ
れ、横枠233のある方向とは反対側の一端を、支持体22
の自由端付近に、接着等の手段によって取付けてある。FIG. 10 is an enlarged plan view of a main part of a conventional head support device, and FIG. 11 is a front view of the same. The flexible body 23 uses an elastic metal plate such as a stainless plate, and has two outer flexible frame portions 231, 232 extending substantially parallel to the longitudinal axis of the support body 22.
And the outer flexible frame portion 23 at the end away from the support 22.
The horizontal frame 233 connecting the 1 and 232, and extending from the substantially central portion of the horizontal frame 233 so as to be substantially parallel to the outer flexible frame portions 231, 232,
A central tongue portion 234 having a tip as a free end, and one end on the side opposite to the direction in which the horizontal frame 233 is provided is provided with a support 22.
It is attached near the free end by means such as adhesion.
中央舌状部234の上面側の略中央部には例えば半球状
の荷重用突起235が設けられていて、この荷重用突起235
により、支持体22の自由端から中央舌状部234へ荷重力
を伝えるようにしてある。荷重用突起235は支持体22の
自由端付近の下面に設けてもよい。そして、中央舌状部
23の下面に磁気ヘッド24を接着等の手段によって取付け
てある。For example, a hemispherical load projection 235 is provided in the substantially central portion on the upper surface side of the central tongue portion 234.
Thus, the load force is transmitted from the free end of the support body 22 to the central tongue-shaped portion 234. The load projection 235 may be provided on the lower surface of the support 22 near the free end. And the central tongue
A magnetic head 24 is attached to the lower surface of 23 by means such as adhesion.
磁気ヘッド24はセラミック構造体でなるスライダ241
を備える。磁気ヘッド24のスライダ241の磁気ディスク
１と対向する一面には、浮上用レール242、243を間隔を
隔てて形成してあり、スライダ241のレール242、243の
方向の一端部には、薄膜磁気ヘッド素子でなる読み書き
素子244、245を付着させてある。読み書き素子244、245
は表面をセラミック等でなる保護膜で覆ってあって、保
護膜の表面には薄膜導体コイルに接続された電極部（24
6、247）、（248、249）を被着させてある。読み書き素
子244、245のうち、何れか一方、例えば読み書き素子24
5の電極部248、249には線材でなるペアのリード線４の
一端部をボンディングしてあり、このリード線４を、磁
気ヘッド24の付近でループ状に巻回した上で、支持体22
の上面に沿い、剛性ビーム部222、弾性バネ部221の方向
に導出してある。The magnetic head 24 is a slider 241 made of a ceramic structure.
Is provided. Floating rails 242 and 243 are formed at intervals on one surface of the slider 241 of the magnetic head 24 facing the magnetic disk 1, and one end portion of the slider 241 in the direction of the rails 242 and 243 is thin-film magnetic. Read / write elements 244 and 245, which are head elements, are attached. Read / write element 244, 245
Has its surface covered with a protective film made of ceramic or the like, and the electrode part (24
6, 247), (248, 249) are applied. One of the read / write elements 244 and 245, for example, the read / write element 24
One end of a pair of lead wires 4 made of a wire is bonded to the electrode portions 248 and 249 of the wire 5. The lead wire 4 is wound in a loop shape near the magnetic head 24, and then the support 22
It is led out in the direction of the rigid beam portion 222 and the elastic spring portion 221 along the upper surface of the.
＜発明が解決しようとする問題点＞ 上述した従来のヘッド支持装置によれば、浮上量0.3
μｍ以上の領域で安定した浮上特性が得られる。しかし
ながら、次のような問題点があった。<Problems to be Solved by the Invention> According to the conventional head supporting device described above, the flying height is 0.3
Stable levitation characteristics can be obtained in the range of μm or more. However, there are the following problems.
（イ）浮上量を従来の1/3以下の0.1μｍ以下に設定し、
スペーシングロスを減少させ、磁気記録の高密度化を達
成するため、磁気ヘッド24を構成するスライダ241の浮
上面の面積を狭くし、揚力動圧を減少させた場合、可撓
体23がステンレス等の弾性金属板で構成されているた
め、スライダ241に発生する揚力動圧に比して、可撓体2
3のバネ性が強すぎ、両者のバランスをとることが困難
で、安定した姿勢制御作用が得られにくくなる。(A) Set the flying height to 0.1 μm or less, which is 1/3 or less of the conventional value,
In order to reduce spacing loss and achieve high density magnetic recording, when the air bearing surface area of the slider 241 forming the magnetic head 24 is narrowed and the lift dynamic pressure is reduced, the flexible body 23 is made of stainless steel. Since it is composed of an elastic metal plate such as the flexible body 2 as compared with the lift dynamic pressure generated in the slider 241,
The elasticity of 3 is too strong, it is difficult to balance the two, and it becomes difficult to obtain a stable posture control action.
（ロ）可撓体23のバネ性と揚力動圧とのバランスをとる
ためには、上記各公報に開示されているように、可撓体
23を複雑な形状、構造にする必要がある。ところが、可
撓体23はステンレス等の弾性金属板で構成されており、
複雑な構造に加工することが困難である。特に、低浮上
量を達成するため、磁気ヘッド24を構成するスライダ24
1を小型化した場合、可撓体23も小さくしなければなら
なず、加工が益々困難になる。(B) In order to balance the spring property of the flexible body 23 and the lift dynamic pressure, as disclosed in the above publications, the flexible body
It is necessary to make 23 a complicated shape and structure. However, the flexible body 23 is composed of an elastic metal plate such as stainless steel,
It is difficult to process into a complicated structure. In particular, in order to achieve a low flying height, the slider 24 constituting the magnetic head 24 is
When the size of 1 is reduced, the flexible body 23 also has to be reduced in size, and machining becomes more difficult.
（ハ）読み書き素子244、245の何れか一方の電極部（24
6、247）または（248、249）に線材でなるリード線４を
接続してあるため、リード線４の接続及び引回しが必要
になり、配線構造が複雑化し、配線、組立作業が面倒に
なるという問題点があった。(C) One of the read / write elements 244 and 245 (24
6, 247) or (248, 249) is connected to the lead wire 4 made of a wire material, the lead wire 4 needs to be connected and routed, which complicates the wiring structure and makes wiring and assembly work troublesome. There was a problem that
（ニ）可撓体23のジンバル作用がリード線４のバネ性の
影響を受けて変化し、安定した浮上特性が得られにく
い。低浮上量化に当って、磁気ヘッド24に発生する揚力
動圧及び可撓体23のバネ性を小さくした場合には、特
に、リード４のバネ性の影響を強く受けて、浮上特性が
変化し易い。(D) The gimbal action of the flexible body 23 changes under the influence of the spring property of the lead wire 4, and it is difficult to obtain stable floating characteristics. In order to reduce the flying height, if the lift dynamic pressure generated in the magnetic head 24 and the spring property of the flexible body 23 are made small, the spring property of the reed 4 is strongly influenced, and the flying property changes. easy.
（ホ）リード線４のバネ性の影響を軽減しようとすれ
ば、リード線４のつくるループを大きくしなければなら
ず、リード線４のループ部分が他の部分に接触する等の
問題を生じ易くなる。(E) In order to reduce the influence of the spring property of the lead wire 4, the loop formed by the lead wire 4 must be enlarged, which causes a problem such that the loop portion of the lead wire 4 contacts another portion. It will be easier.
＜問題点を解決するための手段＞ 上述した従来の問題点を解決するため、本発明に係る
ヘッド支持装置は、弾性バネ部及びこの弾性バネ部に連
続する剛性ビーム部を有し、前記剛性ビーム部の一端が
自由端となっている支持体と、前記支持体の前記自由端
側の下面に配置され、一端が前記支持体に取付けられ、
他端が自由端となっている可撓体と、前記可撓体の上面
または前記支持体の自由端付近の下面の何れか一方に設
けられ前記支持体の自由端から前記可撓体へ荷重力を伝
える荷重用突起と、スライダに読み書き素子を担持させ
てあって前記可撓体の下面に取付けられた磁気ヘッドと
を有する。<Means for Solving Problems> In order to solve the above-mentioned conventional problems, the head supporting device according to the present invention has an elastic spring portion and a rigid beam portion continuous with the elastic spring portion, and A support body having one end of the beam portion as a free end, and a lower surface of the support body on the free end side, the one end is attached to the support body,
The flexible body whose other end is a free end and the upper surface of the flexible body or the lower surface in the vicinity of the free end of the support body are provided with a load from the free end of the support body to the flexible body. It has a load projection for transmitting force and a magnetic head mounted on the lower surface of the flexible body on which a read / write element is carried by the slider.
前記可撓体は、配線用導体を有する高分子樹脂板材に
より構成され、前記導体が前記磁気ヘッドの読み書き素
子の電極部に電気的に接続されている。The flexible body is made of a polymer resin plate material having a wiring conductor, and the conductor is electrically connected to an electrode portion of a read / write element of the magnetic head.
前記可撓体を構成する前記高分子樹脂板材は、前記支
持体の前記剛性ビーム部に形成した孔を通して上面側に
導かれ、前記支持体の前記剛性ビーム部及び前記弾性バ
ネ部の上面に沿って長さ方向に導出されている。The polymer resin plate material constituting the flexible body is guided to the upper surface side through a hole formed in the rigid beam portion of the support body, and extends along the upper surfaces of the rigid beam portion and the elastic spring portion of the support body. Is derived in the longitudinal direction.
＜作用＞ 支持体は、弾性バネ部及びこの弾性バネ部に連続する
剛性ビーム部を有するから、支持体の自由端の下面側に
配置された可撓体及びその下面に取り付けられた磁気ヘ
ッドに対し、荷重用突起を介して、適度の弾性と、荷重
を加えることができる。<Operation> Since the support body has the elastic spring portion and the rigid beam portion continuous with the elastic spring portion, the flexible body disposed on the lower surface side of the free end of the support body and the magnetic head attached to the lower surface thereof are On the other hand, moderate elasticity and load can be applied via the load projection.
荷重用突起が、可撓体の上面または支持体の自由端付
近の下面の何れか一方に設けられ支持体の自由端から可
撓体へ荷重力を伝えるようになっているから、磁気ヘッ
ドに対し、適度の弾性及び荷重のもとで、第１軸に関し
てピッチ運動を行なわせ、第１軸と直交する第２軸に関
してロール運動を行なわせ、磁気ヘッドの偏揺れを除去
するヘッド支持装置が得られる。Since the load projection is provided on either the upper surface of the flexible body or the lower surface near the free end of the support to transmit the load force from the free end of the support to the flexible body, On the other hand, a head support device that removes yaw of the magnetic head by performing a pitch motion about a first axis and a roll motion about a second axis orthogonal to the first axis under appropriate elasticity and load. can get.
上記のような基本的構成において、可撓体は高分子樹
脂板材で構成されている。高分子樹脂板材は、従来のス
テンレス等の弾性金属板に比較して、バネ性が弱く、ひ
ねり、伸びの自由度の高い可撓体を、容易に選択でき
る。従って、磁気ヘッドに対し、適度の弾性及び荷重の
もとで、第１軸に関してピッチ運動を行なわせると共
に、第１軸と直交する第２軸に関してロール運動を行な
わせ、磁気ヘッドの偏揺れを除去する基本的動作におい
て、スライダに発生する揚力動圧と可撓体のバネ性との
バランスをとり、より一層優れた姿勢制御作用を得るこ
とができる。可撓体を高分子樹脂板材によって構成した
ことによる上記作用は、磁気ヘッドを小型化して浮上量
を低減させ、磁気記録の高密度化を図る場合に、特に有
用なものである。In the basic structure as described above, the flexible body is made of a polymer resin plate material. As the polymer resin plate material, as compared with the conventional elastic metal plate such as stainless steel, it is possible to easily select a flexible body having a weak spring property and a high degree of freedom in twisting and stretching. Therefore, the magnetic head is caused to perform a pitch motion with respect to the first axis and a roll motion with respect to a second axis orthogonal to the first axis under a proper elasticity and a load to prevent yawing of the magnetic head. In the basic removal operation, the lift dynamic pressure generated in the slider is balanced with the elasticity of the flexible body, and a more excellent attitude control action can be obtained. The above-described effect of the flexible body made of the polymer resin plate material is particularly useful when the magnetic head is downsized to reduce the flying height and to increase the density of magnetic recording.
また、可撓体を高分子樹脂で構成することにより、加
工が容易になる。しかも、高分子樹脂のひねり及び伸び
の自由度が高いことを利用して、可撓体の形状、構造を
簡単化し、加工及び組立を容易化できるようになる。Further, the flexible body is made of a polymer resin, which facilitates processing. Moreover, by utilizing the high degree of freedom of twisting and stretching of the polymer resin, the shape and structure of the flexible body can be simplified and the processing and assembly can be facilitated.
可撓体を構成する高分子樹脂は、繰返し曲げ性に耐え
得る機械的強度を有し、スライダに発生する揚力動圧に
対して、適度のバネ性、ひねり及び伸びを示す高分子樹
脂を選択使用する。このような高分子樹脂の例として
は、ポリイミド樹脂をあげることができる。For the polymer resin that constitutes the flexible body, select a polymer resin that has mechanical strength that can withstand repeated bendability and that exhibits appropriate springiness, twist and elongation with respect to the lift dynamic pressure generated in the slider. use. An example of such a polymer resin is a polyimide resin.
また、可撓体を構成する高分子樹脂板材に配線用導体
を配設し、この導体を磁気ヘッドの読み書き素子の電極
部に電気的に接続させたから、高分子樹脂板材に形成さ
れた導体を、磁気ヘッドに対する接続導体として利用で
きる。このため、磁気ヘッドに対する配線構造が簡単化
されると共に、線材でなるリード線を用いた従来と異な
って、配線によって、可撓体のジンバル作用が悪影響を
受ける等の問題も生じなくなる。Further, since the wiring conductor is arranged on the polymer resin plate material that constitutes the flexible body and this conductor is electrically connected to the electrode portion of the read / write element of the magnetic head, the conductor formed on the polymer resin plate material is , Can be used as a connecting conductor for a magnetic head. For this reason, the wiring structure for the magnetic head is simplified, and unlike the conventional case in which the lead wire made of a wire material is used, the problem that the gimbal action of the flexible body is adversely affected by the wiring does not occur.
更に、可撓体を構成する合成樹脂板材が支持体の長さ
方向に導出されているから、高分子樹脂板材に設けられ
た配線用導体を、磁気ヘッドから外部へ信号を取出すリ
ード導体として使用でき、リード引出構造を簡単化でき
る。Further, since the synthetic resin plate material forming the flexible body is led out in the length direction of the support, the wiring conductor provided on the polymer resin plate material is used as a lead conductor for extracting a signal from the magnetic head to the outside. The lead lead structure can be simplified.
また、可撓体を構成する合成樹脂板材が支持体に固定
されているから、高分子樹脂板材でなる可撓体は、剛性
ビーム部の振動特性に対してダンパ作用を与える。この
ため、剛性ビーム部の振動振幅が低減し、ヘッドクラッ
シュが生じにくくなる、即ち、追従性が向上する。Further, since the synthetic resin plate material constituting the flexible body is fixed to the support body, the flexible body made of the polymer resin plate material exerts a damper action on the vibration characteristics of the rigid beam portion. Therefore, the vibration amplitude of the rigid beam portion is reduced, and head crush is less likely to occur, that is, the followability is improved.
更に、可撓体を構成する高分子樹脂板材は、支持体に
沿って長さ方向に導出されているから、高分子樹脂板材
に設けられた配線用導体を、磁気ヘッドから外部へ信号
を取出すリード導体として使用でき、リード引出構造を
簡単化できる。可撓体を構成する高分子樹脂板材は、支
持体の剛性ビーム部に形成した孔を通して上面側に導か
れ、支持体の剛性ビーム部及び弾性バネ部の上面に沿っ
て長さ方向に導出されているから、高分子樹脂板材に含
まれる配線用導体をそのまま外部に引き出すことができ
る。このため、外部への信号線取り出し及び接続が容易
になる。Further, since the polymer resin plate material constituting the flexible body is led out in the length direction along the support body, the wiring conductor provided on the polymer resin plate material is taken out from the magnetic head to the outside. It can be used as a lead conductor and the lead lead-out structure can be simplified. The polymer resin plate material forming the flexible body is guided to the upper surface side through the hole formed in the rigid beam portion of the support, and is guided in the length direction along the upper surface of the rigid beam portion and the elastic spring portion of the support. Therefore, the wiring conductor included in the polymer resin plate material can be pulled out as it is. Therefore, it becomes easy to take out and connect the signal line to the outside.
＜実施例＞ 第１図は本発明に係るヘッド支持装置と磁気ディスク
との関係を示す平面部分断面図、第２図は同じくその正
面図、第３図は本発明に係るヘッド支持装置の要部を拡
大して示す平面部分断面図、第４図は同じく正面部分断
面図、第５図は同じく局部拡大断面図である。図におい
て、第８図〜第11図と同一の参照符号は同一性ある構成
部分を示している。可撓体23は、従来はステンレス板等
の弾性金属板によって構成してあったが、本発明におい
ては、配線用導体236、237を被着させた高分子樹脂板材
230で構成してある。可撓体23は、厚みが例えば125μｍ
または250μｍ程度の可撓性のある高分子樹脂板材230の
内部に、厚みが数十μｍ程度の導体236、237を埋設して
配線した構造が適している。導体236、237はその一端部
を磁気ヘッド24に備えられた読み書き素子244、245の何
れか一方の電極、例えば読み書き素子245の電極部248、
249に電気的に接続させ、他端部を外部に引出す。導体2
36、237と電極部248、249との間は、ビームリード導体2
5、26によって接続させてある。<Embodiment> FIG. 1 is a partial plan view showing a relationship between a head support device according to the present invention and a magnetic disk, FIG. 2 is a front view of the same, and FIG. 3 is a schematic view of the head support device according to the present invention. FIG. 4 is an enlarged partial sectional view of a plane, FIG. 4 is a partial sectional view of the same front, and FIG. 5 is an enlarged partial sectional view of the same. In the figure, the same reference numerals as those in FIGS. 8 to 11 denote the same components. The flexible body 23 has conventionally been formed of an elastic metal plate such as a stainless steel plate, but in the present invention, the polymer resin plate material to which the wiring conductors 236 and 237 are adhered is adhered.
It is composed of 230. The flexible body 23 has a thickness of, for example, 125 μm.
Alternatively, a structure in which conductors 236 and 237 having a thickness of about several tens of μm are embedded and wired inside a flexible polymer resin plate member 230 of about 250 μm is suitable. One end of each of the conductors 236 and 237 is an electrode of one of the read / write elements 244 and 245 provided in the magnetic head 24, for example, the electrode portion 248 of the read / write element 245,
It is electrically connected to 249 and the other end is pulled out. Conductor 2
The beam lead conductor 2 is provided between the electrodes 36, 237 and the electrodes 248, 249.
Connected by 5 and 26.
この実施例では、可撓体23は、従来と同様に、支持体
22の長手方向軸線と略平行して伸びる２つの外側可撓性
枠部231、232と、支持体22から離れた端において外側可
撓性枠部231、232を連結する横枠233と、横枠233の略中
央部から外側可撓性枠部231、232に略平行するように延
びていて、先端を自由端とした中央舌状部234とを有し
て構成され、横枠233のある方向とは反対側の一端を、
支持体22の自由端付近に接着等の手段によって取付けて
ある。そして、外側可撓性枠部231、232及び横枠233の
内部に導体236、237を埋設した構造となっている。In this embodiment, the flexible member 23 is a support member as in the conventional case.
Two outer flexible frame portions 231 and 232 extending substantially parallel to the longitudinal axis of 22 and a horizontal frame 233 that connects the outer flexible frame portions 231 and 232 at the end separated from the support 22, There is a lateral frame 233, which is configured to have a central tongue-shaped portion 234 which extends from the substantially central portion of the frame 233 substantially in parallel to the outer flexible frame portions 231, 232, and has a tip as a free end. One end on the side opposite to the direction,
It is attached near the free end of the support 22 by means such as adhesion. The conductors 236 and 237 are embedded inside the outer flexible frame portions 231 and 232 and the horizontal frame 233.
支持体22の自由端付近の下面には、例えば半球状の荷
重用突起223が設けられていて、この荷重用突起223によ
り、支持体22の自由端から中央舌状部234へ荷重力を伝
えるようにしてある。荷重用突起223は、従来と同様
に、可撓体23の上面に設けてもよい。For example, a hemispherical load projection 223 is provided on the lower surface near the free end of the support 22, and the load projection 223 transmits the load force from the free end of the support 22 to the central tongue 234. Is done. The load projection 223 may be provided on the upper surface of the flexible body 23 as in the conventional case.
支持体22は、従来と同様に、弾性バネ部221及びこの
弾性バネ部221に連続する剛性ビーム部222を有し、弾性
金属でなる。また、可撓体23も、従来と同様に、支持体
22の自由端側の下面に配置され、一端が支持体22に取付
けられ、他端が自由端となっている。従って、弾性バネ
部221及び剛性ビーム部222を有する支持体22から、支持
体22の自由端の下面側に配置された可撓体23及びその下
面に取り付けられた磁気ヘッド24に対し、荷重用突起23
5を介して、適度の弾性と、荷重を加えることができ
る。The support 22 has an elastic spring portion 221 and a rigid beam portion 222 continuous to the elastic spring portion 221, and is made of an elastic metal as in the conventional case. In addition, the flexible body 23 also has a support
It is arranged on the lower surface of the free end side of 22, one end is attached to the support 22, and the other end is a free end. Therefore, from the support 22 having the elastic spring portion 221 and the rigid beam portion 222 to the flexible body 23 arranged on the lower surface side of the free end of the support body 22 and the magnetic head 24 attached to the lower surface, the load Protrusion 23
A moderate elasticity and load can be applied via 5.
しかも、従来と同様に、荷重用突起235が、可撓体23
の上面または支持体22の自由端付近の下面の何れか一方
に設けられ支持体22の自由端から可撓体23へ荷重力を伝
えるようになっているから、磁気ヘッド24に対し、適度
の弾性及び荷重のもとで、第１軸に関してピッチ運動を
行なわせ、第１軸と直交する第２軸に関してロール運動
を行なわせ、磁気ヘッド24の偏揺れを除去するヘッド支
持装置が得られる。Moreover, as in the conventional case, the load projection 235 is not
Is provided on either the upper surface of the support 22 or the lower surface near the free end of the support 22 to transmit the load force from the free end of the support 22 to the flexible body 23. Under elasticity and load, a head support device is obtained which causes a pitch motion about the first axis and a roll motion about a second axis orthogonal to the first axis to remove yawing of the magnetic head 24.
上記のような基本的構成において、可撓体23は高分子
樹脂板材で構成されている。高分子樹脂板材は、従来の
ステンレス等の弾性金属板に比較して、バネ性が弱く、
ひねり、伸びの自由度の高い可撓体23を、容易に選択で
きる。従って、磁気ヘッド24に対し、適度の弾性及び荷
重のもとで、第１軸に関してピッチ運動を行なわせると
共に、第１軸と直交する第２軸に関してロール運動を行
なわせ、磁気ヘッド24の偏揺れを除去する基本的動作に
おいて、スライダに発生する揚力動圧と可撓体23のバネ
性とのバランスをとり、より一層優れた姿勢制御作用を
得ることができる。可撓体23を高分子樹脂板材によって
構成したことによる上記作用は、磁気ヘッド24を小型化
して浮上量を低減させ、磁気記録の高密度化を図る場合
に、特に有用なものである。また、可撓体23を高分子樹
脂板材230で構成することにより、加工が容易になる。In the basic configuration as described above, the flexible body 23 is made of a polymer resin plate material. Compared with conventional elastic metal plates such as stainless steel, polymer resin plate materials have weak spring properties,
The flexible body 23 having a high degree of freedom of twisting and stretching can be easily selected. Therefore, the magnetic head 24 is caused to perform a pitch movement about the first axis and a roll movement about a second axis orthogonal to the first axis under a proper elasticity and a load, and the magnetic head 24 is biased. In the basic operation of removing the sway, the lift dynamic pressure generated in the slider is balanced with the spring property of the flexible body 23, and a more excellent posture control action can be obtained. The above-described action of the flexible body 23 made of a polymer resin plate material is particularly useful when the magnetic head 24 is downsized to reduce the flying height and to increase the density of magnetic recording. Further, the flexible body 23 is made of the polymer resin plate material 230, which facilitates the processing.
また、可撓体23は、高分子樹脂板材230に配線用導体2
36、237を被着させ、導体236、237を磁気ヘッド24の読
み書き素子245の電極部248、249に電気的に接続させた
から、導体236、237を、磁気ヘッド24に対する接続導体
として利用できる。導体236、237を読み書き素子の電極
部246、247に導通接続させた場合も同様である。このた
め、磁気ヘッド24に対する配線構造が簡単化されると共
に、リード線を用いた従来と異なって、配線によって、
可撓体23のジンバル作用が悪影響を受ける等の問題も生
じなくなる。In addition, the flexible body 23 includes a wiring conductor 2 on the polymer resin plate material 230.
Since the conductors 236 and 237 are deposited and the conductors 236 and 237 are electrically connected to the electrode portions 248 and 249 of the read / write element 245 of the magnetic head 24, the conductors 236 and 237 can be used as connection conductors for the magnetic head 24. The same applies when the conductors 236 and 237 are electrically connected to the electrode portions 246 and 247 of the read / write element. For this reason, the wiring structure for the magnetic head 24 is simplified, and unlike the conventional method using the lead wire, the wiring
The problem that the gimbal action of the flexible body 23 is adversely affected does not occur.
可撓体23を構成する高分子樹脂板材230は、その後端
部を、支持体22の剛性ビーム部222に形成した孔224を通
して上面側に導き、支持体22の剛性ビーム部222、弾性
バネ部221の上面に沿って長さ方向に導出してある。こ
のような構造であると、高分子樹脂板材230に設けられ
た配線用導体236、237を、磁気ヘッド24から外部へ信号
を取出すリード導体として使用でき、リード引出構造を
簡単化できる。The polymer resin plate material 230 constituting the flexible body 23 has its rear end portion guided to the upper surface side through the hole 224 formed in the rigid beam portion 222 of the support 22, and the rigid beam portion 222 of the support 22 and the elastic spring portion. It is extended in the length direction along the upper surface of 221. With such a structure, the wiring conductors 236 and 237 provided on the polymer resin plate material 230 can be used as lead conductors for extracting signals from the magnetic head 24 to the outside, and the lead lead-out structure can be simplified.
可撓体23を構成する高分子樹脂板材230は、その後端
部を、支持体22の剛性ビーム部222に形成した孔224を通
して上面側に導き、支持体22の剛性ビーム部222、弾性
バネ部221の上面に沿って長さ方向に導出してある。こ
のような構造であると、高分子樹脂板材230に設けられ
た配線用導体236、237を、磁気ヘッド24から外部へ信号
を取出すリード導体として、そのまま外部に引き出すこ
とができる。このため、外部への信号線取り出し及び接
続が容易になる。The polymer resin plate material 230 constituting the flexible body 23 has its rear end portion guided to the upper surface side through the hole 224 formed in the rigid beam portion 222 of the support 22, and the rigid beam portion 222 of the support 22 and the elastic spring portion. It is extended in the length direction along the upper surface of 221. With such a structure, the wiring conductors 236 and 237 provided on the polymer resin plate material 230 can be directly pulled out to the outside as lead conductors for taking out signals from the magnetic head 24 to the outside. Therefore, it becomes easy to take out and connect the signal line to the outside.
また、可撓体23を構成する合成樹脂板材が支持体22に
固定されている。このような構造であると、高分子樹脂
板材でなる可撓体23は、剛性ビーム部222の振動特性に
対してダンパ作用を与える。このため、剛性ビーム部22
2の振動振幅が低減し、ヘッドクラッシュが生じにくく
なる、即ち、追従性が向上する。Further, a synthetic resin plate material forming the flexible body 23 is fixed to the support body 22. With such a structure, the flexible body 23 made of a polymer resin plate material exerts a damper action on the vibration characteristics of the rigid beam portion 222. Therefore, the rigid beam section 22
The vibration amplitude of 2 is reduced, and head crush is less likely to occur, that is, the followability is improved.
実施例において、高分子樹脂板材230は剛性ビーム部2
22、弾性バネ部221の上面に接着剤等を用いて面付け固
定してある。このような構造であると、高分子樹脂板材
23のダンパ材として作用が一層高まるので、剛性ビーム
部222のバネ振動の周波数特性、即ち、振動振幅を一層
低減させ、追従性を更に向上させることができる。In the embodiment, the polymer resin plate material 230 is the rigid beam portion 2
22, the upper surface of the elastic spring portion 221 is fixed by imposition using an adhesive or the like. With such a structure, the polymer resin plate material
Since the function of the damper member 23 is further enhanced, the frequency characteristic of the spring vibration of the rigid beam portion 222, that is, the vibration amplitude can be further reduced, and the followability can be further improved.
更に、この実施例では、支持体22の剛性ビーム部222
上で、高分子樹脂板材230の表面に、磁気ヘッド24に対
する読み書き用集積回路素子６を取付けてある。このよ
うな構造であると、磁気ヘッド24から読み書き用集積回
路素子６までのリード配線距離が短くなり、リードイン
ダクタンスが低下する。このため、読み書き速度が高速
化され、高周波動作をするようになった場合でも、リー
ドインダクタンスによる出力低下を抑え、耐ノイズ性の
高い磁気記録再生装置を実現できるし、更に引出リード
線によるノイズの影響を低減できる。読み書き用集積回
路素子６を磁気ヘッド24に直接に取付けてリードインダ
クタンスを減少させるようにした従来技術は公知（例え
ば特開昭58−118017号公報）であるが、磁気記録の高密
度化の要請から、磁気ヘッド24の形状が益々小型化され
る傾向にあり、集積回路素子６を磁気ヘッド24に取付け
ることが、物理的に困難になっている。この実施例に示
すように、支持体22の剛性ビーム部222上で、高分子樹
脂板材230の表面に読み書き用集積回路素子６を取付け
る構造であると、磁気ヘッド24が小型化された場合でも
充分に対応できる。Further, in this embodiment, the rigid beam portion 222 of the support 22 is
The read / write integrated circuit element 6 for the magnetic head 24 is attached to the surface of the polymer resin plate material 230. With such a structure, the lead wiring distance from the magnetic head 24 to the read / write integrated circuit element 6 is shortened, and the lead inductance is reduced. For this reason, even when the read / write speed is increased and high-frequency operation is performed, it is possible to suppress the output decrease due to the lead inductance, realize a magnetic recording / reproducing device with high noise resistance, and further reduce the noise due to the lead wire. The impact can be reduced. A conventional technique in which the read / write integrated circuit element 6 is directly attached to the magnetic head 24 to reduce the lead inductance is known (for example, Japanese Patent Application Laid-Open No. 58-118017), but there is a demand for high density magnetic recording. Therefore, the shape of the magnetic head 24 tends to be further reduced, and it becomes physically difficult to attach the integrated circuit element 6 to the magnetic head 24. As shown in this embodiment, the structure in which the read / write integrated circuit element 6 is mounted on the surface of the polymer resin plate material 230 on the rigid beam portion 222 of the support body 22 is effective even when the magnetic head 24 is downsized. It can respond sufficiently.
第６図は本発明に係るヘッド支持装置の別の実施例に
おける平面部分断面図、第７図は同じくその正面部分断
面図である。この実施例では、可撓体23は、外側可撓性
枠部、横枠及び中央舌状部等を持たない１枚の高分子樹
脂板材230によって形成し、高分子樹脂板材230のひね
り、伸びの自由度が高いことを利用して、可撓体23の形
状、構造を簡単化し、加工及び組立を容易化してある。FIG. 6 is a plan partial sectional view of another embodiment of the head supporting device according to the present invention, and FIG. 7 is a front partial sectional view of the same. In this embodiment, the flexible member 23 is formed by one piece of polymer resin plate material 230 having no outer flexible frame portion, horizontal frame, central tongue portion, etc., and the polymer resin plate material 230 is twisted and stretched. By utilizing the high degree of freedom of the above, the shape and structure of the flexible body 23 are simplified, and the processing and assembly are facilitated.
＜発明の効果＞ 以上述べたように、本発明によれば、次のような効果
が得られる。<Effects of the Invention> As described above, according to the present invention, the following effects can be obtained.
（ａ）可撓体を高分子樹脂板材で構成したから、可撓体
のひねり、伸びの自由度が高く、磁気ヘッドを小型化し
て浮上量を低減させ、磁気記録の高密度化を図った場合
にも、スライダに発生する揚力動圧と可撓体のバネ性と
のバランスをとり、安定した姿勢制御作用が得られるヘ
ッド支持装置を提供できる。(A) Since the flexible body is made of a polymer resin plate material, the flexible body has a high degree of freedom in twisting and stretching, and the magnetic head is miniaturized to reduce the flying height and to achieve high density magnetic recording. Also in this case, it is possible to provide a head support device that balances the dynamic dynamic pressure of lift generated in the slider and the spring property of the flexible body and obtains a stable attitude control action.
（ｂ）高分子樹脂板材でなる可撓体は、支持体の振動特
性に対してダンパ作用を与える。このため、支持体の振
動振幅が低減し、ヘッドクラッシュが生じにくくなる、
即ち、追従性が向上する。(B) The flexible body made of a polymer resin plate material exerts a damper action on the vibration characteristics of the support body. Therefore, the vibration amplitude of the support is reduced, and head crush is less likely to occur.
That is, the followability is improved.
（ｃ）可撓体を高分子樹脂板材で構成したから、可撓体
の加工及び組立の容易なヘッド支持装置を提供できる。(C) Since the flexible body is made of a polymer resin plate material, it is possible to provide a head support device in which the flexible body can be easily processed and assembled.
（ｄ）高分子樹脂板材に配線用導体を被着させ、この導
体を磁気ヘッドの読み書き素子の電極部に電気的に接続
させたから、導体を、読み書き信号線として利用し、配
線構造を簡単化すると共に、配線によって、可撓体のジ
ンバル作用が悪影響を受けることのないヘッド支持装置
を提供できる。(D) A conductor for wiring is attached to a polymer resin plate material, and this conductor is electrically connected to an electrode portion of a read / write element of a magnetic head. Therefore, the conductor is used as a read / write signal line to simplify the wiring structure. In addition, it is possible to provide a head support device in which the wiring does not adversely affect the gimbal action of the flexible body.
（ｅ）可撓体を構成する高分子樹脂板材は、支持体の剛
性ビーム部に形成した孔を通して上面側に導かれ、支持
体の剛性ビーム部及び弾性バネ部の上面に沿って長さ方
向に導出されているから、高分子樹脂板材に含まれる配
線用導体をそのまま外部に引き出すことができる。この
ため、外部への信号線取り出し及び接続が容易になる。(E) The polymer resin plate material forming the flexible body is guided to the upper surface side through the hole formed in the rigid beam portion of the support, and extends in the length direction along the upper surfaces of the rigid beam portion and the elastic spring portion of the support. Therefore, the wiring conductor included in the polymer resin plate material can be directly drawn to the outside. Therefore, it becomes easy to take out and connect the signal line to the outside.
第１図は本発明に係るヘッド支持装置と磁気ディスクと
の関係を示す平面部分断面図、第２図は同じくその正面
図、第３図は本発明に係るヘッド支持装置の要部を拡大
して示す平面部分断面図、第４図は同じく正面部分断面
図、第５図は同じく局部拡大断面図、第６図は本発明に
係るヘッド支持装置の別の実施例における平面部分断面
図、第７図は同じくその正面部分断面図、第８図は従来
のヘッド支持装置と磁気ディスクとの関係を示す平面
図、第９図は同じくその正面図、第10図は従来のヘッド
支持装置の要部の拡大平面図、第11図は同じく拡大正面
図である。 22……支持体、23……可撓体 24……磁気ヘッド、221……弾性バネ部 222……剛性ビーム部 223……荷重用突起 241……スライダ 244、245……読み書き素子 246〜249……電極部 230……高分子樹脂板材 236、237……導体FIG. 1 is a partial plan sectional view showing the relationship between a head support device according to the present invention and a magnetic disk, FIG. 2 is a front view of the same, and FIG. 3 is an enlarged view of a main part of the head support device according to the present invention. 4 is a front partial cross-sectional view, FIG. 5 is a local enlarged cross-sectional view, and FIG. 6 is a plan partial cross-sectional view of another embodiment of the head supporting device according to the present invention. FIG. 7 is a front partial sectional view of the same, FIG. 8 is a plan view showing the relationship between a conventional head supporting device and a magnetic disk, FIG. 9 is the same front view, and FIG. FIG. 11 is an enlarged front view of the same, and FIG. 11 is an enlarged front view of the same. 22 …… Supporting body, 23 …… Flexible body 24 …… Magnetic head, 221 …… Elastic spring section 222 …… Rigid beam section 223 …… Loading projection 241 …… Slider 244, 245 …… Reading / writing element 246-249 ...... Electrode 230 …… Polymer resin plate material 236, 237 …… Conductor
Claims (2)
剛性ビーム部を有し、前記剛性ビーム部の一端が自由端
となっている支持体と、前記支持体の前記自由端側の下
面に配置され、一端が前記支持体に取付けられ、他端が
自由端となっている可撓体と、前記可撓体の上面または
前記支持体の自由端付近の下面の何れか一方に設けられ
前記支持体の自由端から前記可撓体へ荷重力を伝える荷
重用突起と、スライダに読み書き素子を担持させてあっ
て前記可撓体の下面に取付けられた磁気ヘッドとを有す
るヘッド支持装置であって、 前記可撓体は、配線用導体を有する高分子樹脂板材によ
り構成され、前記導体が前記磁気ヘッドの読み書き素子
の電極部に電気的に接続されており、 前記可撓体を構成する前記高分子樹脂板材は、前記支持
体の前記剛性ビーム部に形成した孔を通して上面側に導
かれ、前記支持体の前記剛性ビーム部及び前記弾性バネ
部の上面に沿って長さ方向に導出されている ヘッド支持装置。1. A support body having an elastic spring portion and a rigid beam portion continuous with the elastic spring portion, one end of the rigid beam portion being a free end, and a lower surface of the support body on the free end side. And a flexible body whose one end is attached to the support and the other end is a free end, and which is provided on either the upper surface of the flexible body or the lower surface near the free end of the support. A head supporting device having a load projection for transmitting a load force from a free end of the support to the flexible body, and a magnetic head having a slider for carrying a read / write element and attached to a lower surface of the flexible body. The flexible body is made of a polymer resin plate material having a wiring conductor, and the conductor is electrically connected to an electrode portion of a read / write element of the magnetic head to form the flexible body. The polymer resin plate material is Serial rigid beam section is guided to the upper side through the formed hole in the support of the rigid beam portion and the elastic spring part head support device along the upper surface is led in the longitudinal direction of the.
ドに対する読み書き用集積回路素子を配置したことを特
徴とする特許請求の範囲第１項に記載のヘッド支持装
置。2. A head supporting device according to claim 1, wherein an integrated read / write circuit element for the magnetic head is arranged on the polymer resin plate material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62290330A JPH087857B2 (en) | 1987-11-17 | 1987-11-17 | Head support device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62290330A JPH087857B2 (en) | 1987-11-17 | 1987-11-17 | Head support device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01130318A JPH01130318A (en) | 1989-05-23 |
| JPH087857B2 true JPH087857B2 (en) | 1996-01-29 |
Family
ID=17754674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62290330A Expired - Lifetime JPH087857B2 (en) | 1987-11-17 | 1987-11-17 | Head support device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH087857B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0670848B2 (en) * | 1989-09-21 | 1994-09-07 | 三菱電機株式会社 | Magnetic head device |
| JP2561716Y2 (en) * | 1991-01-18 | 1998-02-04 | ティーディーケイ株式会社 | Magnetic head device |
| JP2561725Y2 (en) * | 1991-08-12 | 1998-02-04 | ティーディーケイ株式会社 | Magnetic head device |
| JP2000268513A (en) | 1999-03-17 | 2000-09-29 | Tdk Corp | Head slider supporting body and head device and their production, as well as information recording and reproducing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS569576U (en) * | 1979-06-29 | 1981-01-27 | ||
| JPS61104315A (en) * | 1984-10-22 | 1986-05-22 | Fujitsu Ltd | Magnetic head assembly |
| JPS61170113U (en) * | 1985-04-10 | 1986-10-22 |
-
1987
- 1987-11-17 JP JP62290330A patent/JPH087857B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01130318A (en) | 1989-05-23 |
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