JPS60170064A - magnetic head - Google Patents
magnetic headInfo
- Publication number
- JPS60170064A JPS60170064A JP2382784A JP2382784A JPS60170064A JP S60170064 A JPS60170064 A JP S60170064A JP 2382784 A JP2382784 A JP 2382784A JP 2382784 A JP2382784 A JP 2382784A JP S60170064 A JPS60170064 A JP S60170064A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- head
- track
- head slider
- gimbal
- 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
- G11B5/488—Disposition of heads
- G11B5/4886—Disposition of heads relative to rotating disc
-
- 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
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
Landscapes
- Supporting Of Heads In Record-Carrier Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は両面形７０ッピーヘッドの構造に係り特にトラ
ック密度が高（なった場合に、温度変化に依るオフトラ
ックを防止するのに好適、な磁気ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to the structure of a double-sided 70 mm head, and particularly relates to a magnetic head suitable for preventing off-track due to temperature changes when the track density becomes high. Regarding the head.
従来のアームにプラスチック材料を使用し、ヘッドスラ
イダ−を一方には直接固定し、他方にはヘッドスライダ
−を金属の支持バネ（ジンバル）を介して接続する構造
の両面形フロッピーヘッドは、それぞれのアームに同一
のプラスチック材料を使用していたため、温度変化に依
り両面の各々のヘッドスライダ−のコア位置が、プラス
チックアームとジンバルの熱膨張係数の違いによりずれ
、特にトラック密度が高くなる程オフトラックを生じる
ことによる装置マージンが小さくなるという欠点かあっ
た。゛〔発明の目的〕
本発明の目的は、両面形フロッピーヘッドで温度変化に
依る各々のへッドスライ夛°−のコア位置のオフトラッ
クを防止し、高トラツク密度で記録・再生できる磁気ヘ
ッドを提供することにある。Double-sided floppy heads have a structure in which the conventional arm is made of plastic, and the head slider is directly fixed to one arm, and the head slider is connected to the other via a metal support spring (gimbal). Since the same plastic material was used for the arm, the core position of each head slider on both sides would shift due to temperature changes due to the difference in thermal expansion coefficient between the plastic arm and the gimbal, and especially as the track density increases, off-track will occur. This has the disadvantage that the device margin becomes smaller due to the occurrence of . [Object of the Invention] An object of the present invention is to provide a magnetic head that prevents off-tracking of the core position of each head slider due to temperature changes in a double-sided floppy head, and that can record and reproduce data at high track density. It's about doing.
本発明では、温度変化に依りジンバルを介してヘッドス
ライダ−を接続しているアーム側の万が、ヘッドスライ
ダ−を直接固定しているアーム側に対しコア位置の１位
が、アーム材とジンバル材の熱膨張係数の違いに起因し
て同一とならず、オフトラックを生ずるため、ジンバル
を介している側のアームのプラスチック材料を他方のア
ーム材料より熱膨張係数が高いものを使用し各々のコア
位僅の変位を同一にしてオフトラックを防止する。In the present invention, if the arm side that connects the head slider via the gimbal due to temperature changes, the first core position is between the arm material and the gimbal compared to the arm side that directly fixes the head slider. Due to differences in the coefficient of thermal expansion of the materials, they will not be the same, resulting in off-track. Therefore, the plastic material of the arm on the side through the gimbal has a higher coefficient of thermal expansion than the material of the other arm. To prevent off-track by making the slight displacement of the core the same.
以下、本発明の一実施例を第１図により説明する。第１
図は両面形フロッピーヘッドであり、ヘッドスライダ−
１，２とスライダーに組込まれたヘッドコア６．４によ
りフロッピー媒体の両面に記録・再生できる様になって
いる。ヘッドスライダ−１はジンバル５に接着等により
固定され、ジンバル５はアーム６に接着あるいは溶接等
により接続される。ヘッドスライダ−１及びジンバル５
をＤ方向から見た図を第２図に示す。第２図のヘッドス
ライダ−１はジンバル５により媒体の変動に追従する様
に自由度をもって支持される。第２図のヘッドスライダ
−１と同形状のヘッドスライダ−４はアーム７に直接接
着等により固定される。アーム６及びアーム７はそれぞ
れ同−板バネ８．９をインサートしてあり、板バネ８．
９を介して磁気ヘッド全体を媒体半径方向に移動できる
構造を持つキャリッジ１０にネジ止め等で固定する。更
に板バネ８．９は媒体を装置に挿入する時あるいは取外
す時、ヘッドスライダ−１，２と媒体が当たらない様ヘ
ッドスライダ−１，２を互いに離す方向にアーム６．７
をそれぞれ持ち上げるためのものである。さて、従来の
両面形フロッピーヘッドはアーム６．７を同一のガラス
入りポリカーボネート等のプラスチック材料で製作して
いた。又、ジンバル５はステンレス材料で製作していた
ため、第１図のヘッド構造に於て温度変化に依りへ寸法
と８寸法部分の熱変位が異なっていた。即ちＡ寸法の熱
変位なδＡ、 ８寸法の熱変位をδＢとすると
δＡ ＝ （！Ａ Ｘ Ａ Ｘ △ｔ （ｔ＋δＢ＝ａ
ＢｘＢｘΔｔ ｆ２１
αＡニシンパル５の熱膨張係数、αＢ＝アーム７の熱膨
張係数、△ｔ：温度差
となる。従来ヘッドの熱変位差δ＝δ八−δＢを計算す
ると、σＡ＝１５Ｘ１−閣／１℃（ステンレス材料）°
、αＢ＝５０Ｘ１（ｒ’１１℃（ガラス入りポリカーボ
ネート材料）、Δｔ＝６３℃（使用温度帯１０℃〜４３
℃）、Ａ＝Ｂ＝３０−として（１１式、（２）式に代入
するとδ”０．０１５ｍ
となる。又、フロッピー媒体は、ポリエステルベースに
酸化鉄磁性粉を塗布したものであり、フロッピー装置ベ
ース（アルミ材）と相まって熱変位は頂匿アーム７側の
ヘッドスライダ−の熱変位と同一になっている。従って
、従来ヘッドは使用温度かたとえば、１０〜４３℃まで
変化すると、上記計算よりアーム６側のヘッドスライダ
−１の熱変位は装置媒体上の記録トラックに対しＬ］、
０１５■オフトラツクするが、アーム７側のヘッドスラ
イダ−は上述によりオフトラックは起さない。但し、従
来の７０ツピ装置のトラック密度は４８トラック／イン
チ（トラックピッチ０．５２９園）であり、上記オフト
ラック量が有っても装置マージンは十分確保できるレベ
ルであり問題はなかった。しかし、小形化・大容量化の
ニーズに応えるべ（トラック密度の高密度化、例えば９
６〜１４４トラック／インチあるいはそれ以上とするた
めには、上記オフトラック量は装置マージンに大きな影
響を与え、無視できなくなる。そこで、上述の理由によ
りアーム６側のヘッドスライダ−１の熱変位をアーム７
側のヘッドスライダ−の熱変位に合せればオフトラック
は防止できるため、アーム６をアーム７より大きな熱膨
張係数のプラスチック材料を使用すれば良い。即ち、ヘ
ッドスライダ−１及び２の熱変位を等しくするためには
、１の熱変位をδ１、。An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows a double-sided floppy head with a head slider.
1 and 2 and a head core 6.4 built into the slider, it is possible to record and reproduce data on both sides of the floppy medium. The head slider 1 is fixed to the gimbal 5 by adhesive or the like, and the gimbal 5 is connected to the arm 6 by adhesive or welding. Head slider 1 and gimbal 5
Fig. 2 shows a view of this as seen from direction D. The head slider 1 shown in FIG. 2 is supported by a gimbal 5 with a degree of freedom so as to follow the fluctuations of the medium. A head slider 4 having the same shape as the head slider 1 shown in FIG. 2 is fixed to the arm 7 by direct adhesive or the like. The arm 6 and the arm 7 each have the same leaf spring 8.9 inserted therein.
The entire magnetic head is fixed via screws 9 to a carriage 10 having a structure capable of moving in the radial direction of the medium. Further, the leaf spring 8.9 moves the arm 6.7 in a direction to separate the head sliders 1 and 2 from each other so that the head sliders 1 and 2 do not come into contact with the medium when inserting or removing the medium from the apparatus.
It is for lifting each. Now, in the conventional double-sided floppy head, the arms 6 and 7 are made of the same plastic material such as glass-filled polycarbonate. Furthermore, since the gimbal 5 was made of stainless steel, the thermal displacement of the hexagonal and 8th dimension portions of the head structure shown in FIG. 1 differed due to temperature changes. In other words, if the thermal displacement of dimension A is δA, and the thermal displacement of dimension 8 is δB, then δA = (!A X A X △t (t+δB=a
BxBxΔt f21 αA thermal expansion coefficient of Nishinpal 5, αB=thermal expansion coefficient of arm 7, Δt: temperature difference. Calculating the thermal displacement difference δ = δ8 - δB of the conventional head, σA = 15X1 - Kaku/1℃ (stainless steel material) °
, αB=50
℃), A = B = 30- (Equation 11, substituting into Equation (2) gives δ"0.015m.Furthermore, the floppy medium is a polyester base coated with iron oxide magnetic powder. Coupled with the device base (aluminum material), the thermal displacement is the same as the thermal displacement of the head slider on the top arm 7 side.Therefore, if the conventional head's operating temperature changes, for example, from 10 to 43 degrees Celsius, the above calculation The thermal displacement of the head slider 1 closer to the arm 6 is L with respect to the recording track on the device medium],
015■ Off-track occurs, but the head slider on the arm 7 side does not off-track as described above. However, the track density of the conventional 70-track device is 48 tracks/inch (track pitch 0.529 inches), and even with the above-mentioned off-track amount, the device margin can be sufficiently secured and there was no problem. However, in order to meet the needs for smaller size and larger capacity (higher track density, for example, 9
In order to achieve 6 to 144 tracks/inch or more, the above-mentioned off-track amount has a large effect on the device margin and cannot be ignored. Therefore, for the above-mentioned reason, the thermal displacement of the head slider 1 on the arm 6 side is
Since off-track can be prevented by matching the thermal displacement of the side head slider, the arm 6 may be made of a plastic material with a larger coefficient of thermal expansion than the arm 7. That is, in order to equalize the thermal displacements of head sliders 1 and 2, the thermal displacement of 1 should be δ1.
２の熱変位なδ、とすると
δ、＝αＡＸＡｘΔｔ＋ａＣｘＣｘΔｔ （３１δ、
＝ ａＢ ｘ （Ｂ＋Ｃ） ｘ ΔＴ ｆ４ｔαＣニア
−ムロの熱膨張係数
となりδ１＝δ、とすれば良いので（３）式と（４）式
からとなる。Ａ、Ｂ、αＡ、ａＢを前出の値を用い、Ｃ
＝ ２５ ＋ｗとして（５）式に代入するとａＣ＝ ４
８ Ｘ Ｉ Ｗ’１ｍ１１／℃＞ ａＢ （６１となる
。従って、第１図の構造の両面形フロッピーヘッドに対
しては、アーム６の材料は（６）式よりアーム７の熱膨
張係数αＢより大きなａＣの材料を使用すればヘッドス
ライダ−１は２と熱変位が等しくなり、フロッピー媒体
の記録トランクに対するオフトラックを防止できる。又
、アーム６の熱膨張係数αＣをアーム７の熱膨張係数α
Ｂより大きくする手段として。If δ is the thermal displacement of 2, then δ, = αAXAxΔt+aCxCxΔt (31δ,
= aB x (B+C) x ΔT f4tαC is the near-muro coefficient of thermal expansion, and it is sufficient to set δ1=δ, so equations (3) and (4) are used. Using the above values for A, B, αA, and aB, C
When substituting = 25 +w into equation (5), aC = 4
8 If a material with a large aC is used, the thermal displacement of head slider 1 will be equal to that of head slider 2, and off-track with respect to the recording trunk of the floppy medium can be prevented.
As a means to make it larger than B.
通常アーム７はガラス入りポリカーボネート（ガラス含
有率２０〜４０％）材を使用しているため、アーム６の
材料はガラス含有率をアーム７よりも相対的に少なくし
て（数％〜２０％）、、ａＣを所望の値にすれば良い。Normally, arm 7 is made of glass-containing polycarbonate (20-40% glass content), so arm 6 is made of a material with a relatively lower glass content than arm 7 (several %-20%). , , aC may be set to a desired value.
又、アーム６のプラスチック材料をアーム７の材料と別
系統のものを選んでも本発明のヘッドは容易に実現でき
る。以上述べた様に本実施例によれば、温度に依るヘッ
ドスライダ−の媒体に対するオフトラックを容易に防止
できる効果がある。Furthermore, the head of the present invention can be easily realized even if a plastic material for the arm 6 is selected from a different type of material from that for the arm 7. As described above, this embodiment has the effect of easily preventing off-track of the head slider relative to the medium due to temperature.
本発明によれば、フロッピー媒体に対するヘッドスライ
ダ−のオフトラックを数ミクロン以下に抑えることがで
きるので、特にトラック密度が４８トラック／インチ以
上の９６〜１４４トラック／インチあるいはそれ以上の
フロッピー装置の磁気ヘッドに適用でき、高トラツク密
度のフロッピー装置の動作マージン確保即ち亮信頼度化
の効果が有る。According to the present invention, the off-track of the head slider with respect to the floppy medium can be suppressed to a few microns or less, so that the magnetic field of the floppy device can be reduced, especially when the track density is 48 tracks/inch or more, 96 to 144 tracks/inch, or more. It can be applied to heads, and has the effect of ensuring the operating margin of floppy devices with high track density, that is, increasing reliability.
第１図は本発明の一実施例の磁気ヘッド構造図、第２図
は第１図のＤから見た図である。
１．２・・・・・・・・ヘッドスライダ−６，４・・・
・・・・・ヘッドコア、 ５・・・・・・・・・ジンバ
ル６．７・・・・・・・・・アーム ８．９・・・・・
・・・・板ハネ１０・・・・・・・・・キャリッジ
２／ 図
十Ｚ団
手続補正書（方式）
％式％
補正をする者
ＩｆｆＬトノｌ９Ｊｌｆ 特許出願人
名 称 ′５＋ｏＨ，Ｈｙ式会月 １」 立 製 作
所載 理 人FIG. 1 is a structural diagram of a magnetic head according to an embodiment of the present invention, and FIG. 2 is a view seen from D in FIG. 1.2...Head slider-6, 4...
...Head core, 5...Gimbal 6.7...Arm 8.9...
・・・・・・Plate 10・・・・・・・・・Carriage 2/ Figure 10 Z group procedural amendment (method) % Formula % Person making the amendment IfL9Jlf Name of patent applicant Name ’5+oH, Hy style meeting month 1. Standing production
Published by Rito
Claims (1)
イダ−を固定し、他方を記録媒体に追従させる自由度を
持たせるため、金属の支持バネ（ジンバル）を介してプ
ラスチック材料を使用したアームにヘッドスライダ−を
接続する構造の両面形フロッピーヘッドにおいて、それ
ぞれのアームで熱膨張係数が異なるプラスチック材料を
使用することを特徴とする磁気ヘッド。One side of the head slider is fixed to an arm made of plastic material, and the other side is attached to an arm made of plastic material via a metal support spring (gimbal) in order to have the flexibility to follow the recording medium. A double-sided floppy head with a structure in which the arms are connected to each other, and each arm is made of a plastic material with a different coefficient of thermal expansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2382784A JPS60170064A (en) | 1984-02-10 | 1984-02-10 | magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2382784A JPS60170064A (en) | 1984-02-10 | 1984-02-10 | magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60170064A true JPS60170064A (en) | 1985-09-03 |
Family
ID=12121200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2382784A Pending JPS60170064A (en) | 1984-02-10 | 1984-02-10 | magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60170064A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5434221A (en) * | 1977-06-13 | 1979-03-13 | Tandon Magnetics Corp | Double side medium magnetic recorder |
| JPS5792464A (en) * | 1980-11-29 | 1982-06-09 | Ricoh Co Ltd | Head carriage |
-
1984
- 1984-02-10 JP JP2382784A patent/JPS60170064A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5434221A (en) * | 1977-06-13 | 1979-03-13 | Tandon Magnetics Corp | Double side medium magnetic recorder |
| JPS5792464A (en) * | 1980-11-29 | 1982-06-09 | Ricoh Co Ltd | Head carriage |
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