JPH0464913A - Floating magnetic head unit - Google Patents
Floating magnetic head unitInfo
- Publication number
- JPH0464913A JPH0464913A JP17621190A JP17621190A JPH0464913A JP H0464913 A JPH0464913 A JP H0464913A JP 17621190 A JP17621190 A JP 17621190A JP 17621190 A JP17621190 A JP 17621190A JP H0464913 A JPH0464913 A JP H0464913A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- magnetic
- main body
- recording medium
- heat
- 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
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 229920002379 silicone rubber Polymers 0.000 abstract description 4
- 239000004945 silicone rubber Substances 0.000 abstract description 4
- 239000003822 epoxy resin Substances 0.000 abstract description 3
- 229920000647 polyepoxide Polymers 0.000 abstract description 3
- 230000003685 thermal hair damage Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野 ）
本発明はディスク状の情報記録媒体に対向して磁気ヘッ
ドを備えたスライダー本体を配設し、記録媒体の同転で
発生した空気流によって上記スライダー本体を汀上させ
るようにした浮上式の磁気ヘッドユニットに関する。Detailed Description of the Invention (Industrial Field of Application) The present invention is characterized in that a slider body equipped with a magnetic head is disposed facing a disk-shaped information recording medium, and the air flow generated by the simultaneous rotation of the recording medium The present invention relates to a floating type magnetic head unit in which the slider body is made to float.
（従来の技術 ）
光磁気式情報記録再生装置ではディスク状記録媒体に対
して光スポットを与えながら、変調磁界を印加し、・１
１？報の記録を行っているが、ここでは、例えば、特開
平！ −＋ ９９ ：３０１号に記載されているように
１１記記録媒体に変調磁界を１４えるための磁気へ・ソ
トを備えた空気浮上式スライダを用いている。これは通
常、第３図に示すように、空気の流れツノ向（矢印で示
す）に沿って長いスライダー本体１０１の前部に磁気ヘ
ッド＋０２を配設したもので、ト記磁気ヘッド＋０２は
ド端が開放された口字形のコア＋０２八にコイル１０２
Ｂを捲回したもので、上記コイルＩ Ｏ２Ｂへの電流の
供給で変調磁界を発生している。(Prior art) In a magneto-optical information recording/reproducing device, a modulated magnetic field is applied while giving a light spot to a disk-shaped recording medium.
1? We are recording the information, but here, for example, Tokukaihei! As described in No. 11-99:301, an air-levitating slider equipped with a magnetic slider for applying a modulated magnetic field to the recording medium is used. Usually, as shown in Fig. 3, a magnetic head +02 is disposed at the front of a long slider body 101 along the direction of the air flow horn (indicated by an arrow). Coil 102 in a mouth-shaped core +028 with an open end
A modulated magnetic field is generated by supplying current to the coil IO2B.
ここで、−１−記コア１０２ΔはＭ。−Ｚｏフェライト
などの磁ヤを材料よりなり、ｌ−記スライダー本体＋０
１はセラミックなどの非磁性体材料よりなる。Here, -1- core 102Δ is M. -Made of magnetic material such as Zo ferrite, slider body +0
1 is made of a non-magnetic material such as ceramic.
（発明が解決しようとする課題 ）
１゛記磁気ヘツトユニツトは、例えば、磁気コア１０２
Δの断面ζ」法が０． ：３ｍ、？Ｘ０．３．−コイル
巻き線として線径が９０μ、のエナメル線を１５回、巻
いたものを用いれば、０．５Δの電流１を上記コイル１
０２Ｂに流すことで、２５００、（エルステッド）の磁
界を発生させることができる。しかし、実験によれば、
このような構成の磁気ヘッド１０２で８ Ｍ Ｈ７の情
報信号を記録するのに振幅ＩＡ（±０．５Ａ）の電流を
流すとき、磁気コア＋ ０２Ａで発生ずる損失（鉄損）
および巻き線で発生ずる損失（銅損）は約０．６Ｗであ
り、この損失に伴う発熱により磁気コア１０２Ａおよび
巻き線の温度は約１８０°Ｃまで上ｎ＋する。このよう
に高温な状態で、］−記スライダ本体１０１を記録媒体
−トでスライドさせるとき、その表面との接触で、所謂
ヘッドクラ・ソシュが起これば、それによる衝撃と、そ
の時の温度状態にＪル＜記録媒体表面の保護膜の軟化で
、記録媒体の表面形状が変化し、凹凸や傷を発生しやす
くする。また、記録媒体表面に付着した指紋などの有機
物の焼き付きにより記録媒体あるいは磁気へ・ソドを損
傷して１．まっ。(Problems to be Solved by the Invention) The magnetic head unit described in 1.
The cross section ζ of Δ is 0. :3m? X0.3. - If an enameled wire with a wire diameter of 90μ is wound 15 times as a coil winding wire, a current 1 of 0.5Δ is applied to the coil 1.
02B, it is possible to generate a magnetic field of 2500 Oersteds. However, according to experiments,
When a current with an amplitude IA (±0.5A) is passed to record an 8 MH7 information signal with the magnetic head 102 having such a configuration, the loss (iron loss) that occurs in the magnetic core +02A is
The loss (copper loss) generated in the winding is about 0.6 W, and the heat generated by this loss increases the temperature of the magnetic core 102A and the winding to about 180°C. When the slider main body 101 is slid by the recording medium in such a high temperature state, if a so-called head crack occurs due to contact with the surface of the slider body 101, the shock caused by this and the temperature condition at that time will cause damage. Jru < The softening of the protective film on the surface of the recording medium changes the surface shape of the recording medium, making it more likely to cause unevenness and scratches. In addition, organic substances such as fingerprints attached to the surface of the recording medium may damage the recording medium or magnetic field. Okay.
更に、コイルに使用されるエナメル線の絶縁皮膜は、一
般的なもので１２００ｃ、特殊なもので１５０°Ｃの耐
熱温度であるから、１−述のような高温での使用は好ま
しくない。また、磁気コアの材料はフェライトであって
、高温では透磁率が低下し、多くのものけ２００’Ｃ前
後で透磁率が１となり、磁性を失うこととなる。Furthermore, since the insulating film of the enameled wire used in the coil has a heat resistance temperature of 1200° C. for a general type and 150° C. for a special type, it is not preferable to use it at high temperatures as described in 1-1. Further, the material of the magnetic core is ferrite, and the magnetic permeability decreases at high temperatures, and the magnetic permeability reaches 1 at around 200'C in many cases, resulting in loss of magnetism.
（発明の目的 ）
本発明は−に１．−１４情に基いてなされたもので、に
述のにうな磁界発生部分で発生した熱を効果的に放散で
きる。Ｌうにして、局部的な温度１ユ冒を避け、磁気ヘ
ッドやスライダー本体の熱的損傷を未然に防１１−シよ
うとした磁気へ・ソトユニ・ントを提供しようとするも
のである。(Object of the Invention) The present invention consists of -1. -14, and can effectively dissipate the heat generated in the magnetic field generating portion as described in . The purpose of this invention is to avoid local temperature fluctuations and prevent thermal damage to the magnetic head and slider body.
（課題を解決するだめの手段 ）
このため、本発明ではディスク状情報記録媒体に対向し
て磁気ヘッドを備えたスライダー本体を配設し、Ｌ記記
録媒体の回転で表面に発生ずる空気流により」−記スラ
イダー本体を浮トさせるようにした浮１゛式の磁気ヘッ
ドユニットにおいて、上記磁気ヘッドの磁界発生部に近
接して、高い熱伝導性の材質よりなる放熱部材を設けて
いる。。(Means for Solving the Problem) For this reason, in the present invention, a slider body equipped with a magnetic head is disposed facing the disk-shaped information recording medium, and the airflow generated on the surface by the rotation of the L-shaped recording medium is In the floating magnetic head unit in which the slider body is made to float, a heat dissipation member made of a material with high thermal conductivity is provided in close proximity to the magnetic field generating portion of the magnetic head. .
（作 用 ）
従って、たとλ磁気ヘッドで発熱１．ても、ｌ−記故熱
部材の働きでそこに発生した熱をｌ々散じ、局部的な温
度上昇を避けることができ、磁気ヘッドやこねに対向す
る記録媒体の熱的損傷を避けることができる。(Function) Therefore, the λ magnetic head generates heat 1. However, the heat generated there is dissipated by the action of the recording heat member, and local temperature rise can be avoided, and thermal damage to the magnetic head and the recording medium facing the kneader can be avoided. can.
（実施例 ）
以下、本発明の実施例を図面を参照して−１，１体的に
説明する。図において符りｌは非磁性材料、例λば、セ
ラミックよりなるスライダー本体であり、ディスク吠記
録媒体（図示せず）に対向して磁気ヘッドを備えている
。１−記磁気ヘッドは士向きに開放された磁性材料、例
えば、フェライトよりなるコ字形の磁気コア５とこれに
巻き付けられたエナメル線よりなるコイル６とで構成さ
れており、上記磁気コア５の開放端側は」１記スライダ
本体１に埋設されている。(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 indicates a slider body made of a non-magnetic material, for example, ceramic, and is provided with a magnetic head facing a disk recording medium (not shown). 1- The magnetic head is composed of a U-shaped magnetic core 5 made of a magnetic material such as ferrite, which is open toward the outside, and a coil 6 made of enameled wire wound around the magnetic core 5. The open end side is buried in the slider body 1.
１＝記スライダ一本体１は−１−記記録奴体に対向する
面に空気の流れ方向に延びる溝条２をその中央に備えて
いる。The main body 1 of the 1=recording slider is provided with a groove 2 extending in the direction of air flow at its center on the surface facing the −1−recording body.
また、上記スライダー本体１はその溝条２の両側に位置
してスライド面３．３を備えており、その後端にはテー
バ面４を備えている。Further, the slider main body 1 is provided with sliding surfaces 3.3 located on both sides of the groove 2, and is provided with a tapered surface 4 at the rear end.
また、上記スライダー本体１」二に位置して、」１記磁
気ヘッドを覆うように放熱部材７が取付けてあり、この
放熱部材７と１−記磁気コア５およびコイル６との間に
形成される隙間には熱伝導率の高いシリコンゴムやエボ
シキ樹脂などの材料８が充填されている。Further, a heat dissipating member 7 is installed at the slider body 1'2 so as to cover the magnetic head'1, and is formed between the heat dissipating member 7 and the magnetic core 5 and coil 6'. The gap is filled with a material 8 such as silicone rubber or epoxy resin having high thermal conductivity.
なお、この実施例では、上記放熱部材７の熱の放散を十
分に発揮するため、その土部に櫛歯状に放熱フィン７ａ
を形成している。また、上記放熱部材７および放熱フィ
ンの材料としてはアルミニュウム、銅、あるいはその合
金などの金属材料、もしくは窒化アルミニュウム、炭化
珪素、窒化はう素などのセラミック材料であるとよい。In this embodiment, in order to sufficiently dissipate heat from the heat dissipating member 7, comb-shaped heat dissipating fins 7a are provided on the soil part.
is formed. The material for the heat dissipation member 7 and the heat dissipation fins may be a metal material such as aluminum, copper, or an alloy thereof, or a ceramic material such as aluminum nitride, silicon carbide, or boron nitride.
このように構成された磁気ヘッドユニットでは、変調磁
界を与えるために上記磁気コイル６に電流を印加した時
、そこで発生ずるジュール熱はト記放熱部材７を介して
人気中に放散され、その局部温度が１／「容イＩ＋’ｊ
以トに保持される。このため、磁気ヘッドや記録媒体表
向の温度が低く管理されるから、へ・ントクラ・ンシュ
にＪ二るイＬ３の発１１がｚｉ ｈＪられ、十記接触向
での有機物の焼き付きを避けることができ、また、磁気
二】イル６の巻き線に、般的な耐熱温度１２０°Ｃのエ
ナメル線を使用することができる。史に、磁気コア５に
使用するフェライトの透磁率の低トもないので、磁界の
発イ１効ヰもトがることかない。In the magnetic head unit configured as described above, when a current is applied to the magnetic coil 6 to provide a modulated magnetic field, the Joule heat generated therein is radiated through the heat dissipation member 7, and the heat is dissipated in the local area. Temperature is 1/'I+'j
It is retained below. For this reason, since the temperature of the magnetic head and the surface of the recording medium is controlled to be low, the generation of 11 of J2 L3 is carried out on the front side of the head, and the burning of organic matter on the 11th contact side is avoided. Furthermore, for the winding of the magnetic coil 6, a general enamelled wire with a heat resistance temperature of 120°C can be used. Historically, the magnetic permeability of the ferrite used for the magnetic core 5 has never been low, so the effectiveness of the magnetic field will not be increased.
第２図に示す実施例では１．記スライダー本体１は、磁
気コア５を埋め込むための縦？Ｍ ＩΔと」記磁気コア
５に巻き付けるコイル６のための横γ１ηＩＢとを形成
しており、磁気ヘッドの取付けが終ｒした段階で、そこ
に子連のようなシリコンゴムやエボシキ樹脂などが充填
される。In the embodiment shown in FIG. Is the slider body 1 vertical to embed the magnetic core 5? It forms the horizontal γ1ηIB for the coil 6 to be wound around the magnetic core 5, and when the magnetic head is installed, it is filled with silicone rubber, epoxy resin, etc. be done.
以１の各実施例における磁気ヘッドユニー・ントに電７
ＡＬを流した場合の実験例では、０．６Ｗの損失を牛し
た時、磁気：】アおよび巻き線の？１ｔｌａ度は１００
０Ｃであり、従来例に比較して十分低い温度である。The magnetic head unit in each of the first embodiments has an electric current of 7.
In an experimental example when AL is flowing, when a loss of 0.6W is assumed, the magnetic field: ] A and the winding's ? 1 tla degree is 100
0C, which is a sufficiently low temperature compared to the conventional example.
（発明の効果 ）
本発明は以１−詳述したようになり、スライダ本体に設
けた磁気ヘッドにおける発生熱を放熱部材で効果的に放
散するので、局部的に温度がトＷすることがなく、−１
−記磁気へ・ソトユニｌｉ７トや、記録媒体に対して熱
的損傷を！］；えるおそれがないしかも、局部的温度上
ν１−を避けられることから、磁気コアの透磁率を低ト
させることがなく、磁界の発牛効ヰを低下さセず、また
、磁気：］イルに般的な低耐熱温度のエリーメル線を使
用できる。(Effects of the Invention) The present invention is as described in detail in 1 below, and since the heat generated in the magnetic head provided in the slider body is effectively dissipated by the heat radiating member, there is no local temperature fluctuation. , -1
-Thermal damage to recording magnetic units and recording media! ]; In addition, since the local temperature ν1- can be avoided, the magnetic permeability of the magnetic core will not be reduced, and the effectiveness of the magnetic field will not be reduced. Eriemel wire, which has a low heat-resistant temperature and is commonly used for cables, can be used.
第１図（ａ ）、（ｂ）および（０）は本発明の一実施
例を示す斜視図、１１モ面図および側面図、第２図（ａ
）、（ｂ）および（Ｃ）は別の実施例を示す斜視図、Ｉ
Ｌ而面および側面図、第３図は従来の磁気ヘッドの斜視
図である
１２１．スライダー本体
２ 。
４ 、 。
６ 。
７ａ。
８ 、 。
溝条 ３１．スライド面
子−バ面 ５０１．磁気コア
コイル ７１１．敢然部材
、放熱フィン
シリコンゴムなどの材料Figures 1 (a), (b) and (0) are a perspective view, a side view and a side view showing one embodiment of the present invention, and Figure 2 (a).
), (b) and (C) are perspective views showing another embodiment, I
Figure 3 is a perspective view of a conventional magnetic head. Slider body 2. 4. 6. 7a. 8. Mizojo 31. Slide surface - surface 501. Magnetic core coil 711. Materials such as bold parts, heat dissipation fin silicone rubber, etc.
Claims (1)
スライダー本体を配設し、上記記録媒体の回転で表面に
発生する空気流により上記スライダー本体を浮上させる
ようにした浮上式の磁気ヘッドユニットにおいて、上記
磁気ヘッドの磁界発生部に近接して、高い熱伝導性の材
質よりなる放熱部材を設けたことを特徴とする浮上式の
磁気ヘッドユニット。In a floating magnetic head unit, in which a slider body equipped with a magnetic head is disposed facing a disk-shaped information recording medium, and the slider body is levitated by airflow generated on the surface by rotation of the recording medium. . A floating magnetic head unit, characterized in that a heat dissipation member made of a highly thermally conductive material is provided in close proximity to a magnetic field generating portion of the magnetic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17621190A JPH0464913A (en) | 1990-07-05 | 1990-07-05 | Floating magnetic head unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17621190A JPH0464913A (en) | 1990-07-05 | 1990-07-05 | Floating magnetic head unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0464913A true JPH0464913A (en) | 1992-02-28 |
Family
ID=16009568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17621190A Pending JPH0464913A (en) | 1990-07-05 | 1990-07-05 | Floating magnetic head unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0464913A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7804743B2 (en) * | 2005-04-05 | 2010-09-28 | Hitachi, Ltd. | Thermally assisted magnetic recording head and method of manufacturing the same |
-
1990
- 1990-07-05 JP JP17621190A patent/JPH0464913A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7804743B2 (en) * | 2005-04-05 | 2010-09-28 | Hitachi, Ltd. | Thermally assisted magnetic recording head and method of manufacturing the same |
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