JPH04125905A - Magnetic core head for prepaid card - Google Patents
Magnetic core head for prepaid cardInfo
- Publication number
- JPH04125905A JPH04125905A JP2248424A JP24842490A JPH04125905A JP H04125905 A JPH04125905 A JP H04125905A JP 2248424 A JP2248424 A JP 2248424A JP 24842490 A JP24842490 A JP 24842490A JP H04125905 A JPH04125905 A JP H04125905A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- core
- thickness
- flux density
- magnetic flux
- 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
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 10
- 239000000956 alloy Substances 0.000 claims abstract description 10
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 229910000702 sendust Inorganic materials 0.000 claims abstract description 6
- 239000011162 core material Substances 0.000 abstract description 52
- 230000035699 permeability Effects 0.000 abstract description 20
- 230000004907 flux Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 5
- 229910002796 Si–Al Inorganic materials 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000013590 bulk material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910018229 Al—Ga Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、テレホンカード、パチンコカード。[Detailed description of the invention] [Industrial application field] The present invention is a telephone card and a pachinko card.
ストアードカード等の所謂プリペイドカードの記録およ
び/または再生に用いられる磁気へラドコアに関するも
のである。The present invention relates to a magnetic held core used for recording and/or reproducing so-called prepaid cards such as stored cards.
従来より磁気カードの磁性面に対し記録および/または
再生を行うために磁気へラドコアが用いられている。こ
の磁気ヘッドコアの材料としては、Fe−5i−Al系
合金(一般にセンダストと称されている)が磁気特性に
優れ且つ耐摩耗性、耐食性に優れていることから汎用さ
れている。このFe−5i−Al系合金を用いた磁気へ
ラドコアの製造方法は、Fe−5i−Al系合金の鋳塊
を製造し、この鋳塊を熱間加工等により平板に加工した
後、切断および研削などの機械加工により所定形状に加
工すると共に、加工時のひずみを除去し、且つ適正な磁
気特性を発現させる目的で、焼鈍して製造する方法、所
謂バルク材を用いた磁気へラドコアの製造方法が一般的
である。2. Description of the Related Art Conventionally, magnetic helad cores have been used to perform recording and/or reproduction on the magnetic surface of a magnetic card. Fe-5i-Al alloy (generally referred to as sendust) is widely used as a material for the magnetic head core because it has excellent magnetic properties, wear resistance, and corrosion resistance. The method for producing a magnetic helad core using this Fe-5i-Al alloy is to produce an ingot of Fe-5i-Al alloy, process the ingot into a flat plate by hot working, etc., and then cut and process the ingot into a flat plate. A method of manufacturing magnetic helad cores using so-called bulk materials, which is processed into a predetermined shape by machining such as grinding, and then annealed for the purpose of removing strain during processing and developing appropriate magnetic properties. The method is common.
一方、磁気テープの記録および/または再生用の磁気へ
ラドコアには、前記Fe−3i−Al系合金の鋳塊より
加工して得た平板を切断および研削などの機械加工によ
り所定形状に加工する際、その厚さを薄く取り、0.2
mm程度まで薄く研磨したバルクコア材に加工しその多
数枚を厚さ方向に接着剤によって接合積層して製造され
たコアや、Fe−5i−Al系合金の溶湯をロール法を
用いて超急冷して薄帯とし、必要により焼鈍した後、二
〇薄帯よりコア取りをしたコア材の多数枚を厚さ方向に
接着剤によって接合積層し、さらに研磨して製造された
コア〔「最新の磁気ヘッド」発行所:ミマッデータシス
テム、昭和59年10月15日発行参照jなどがある。On the other hand, a magnetic helad core for recording and/or reproducing magnetic tape is produced by processing a flat plate obtained by processing the Fe-3i-Al alloy ingot into a predetermined shape by machining such as cutting and grinding. At this time, reduce the thickness to 0.2
Cores manufactured by processing bulk core materials polished to a thickness of about 1.0 mm and laminating a large number of them by bonding them in the thickness direction with adhesive, and ultra-quenching molten metal of Fe-5i-Al alloy using a roll method. The core material is manufactured by laminating a large number of core materials in the thickness direction with an adhesive, and then polishing them. "Head" Publisher: Mimac Data System, published on October 15, 1981, etc.
一方、近年使用されているプリペイドカードにおいては
、磁性面の磁気媒体の保磁力(Hc)か、従来約800
0 eであったものが27500e以上に向上してきて
いる。On the other hand, in prepaid cards used in recent years, the coercive force (Hc) of the magnetic medium on the magnetic surface is approximately 800
What was 0e has improved to more than 27500e.
ところで、このように磁性面の磁気媒体の保磁力か高い
プリペイドカードに、上述したバルク材を用いた磁気ヘ
ッドコアまたは積層磁気へラドコアで記録および/また
は再生を行った場合、カードを飽和させる前に磁気へラ
ドコアの方が入力電流で飽和してしまい、オーバライド
(磁気媒体に一度書き込んだ信号の上に、違う信号を重
ね書きすること)時に、先の信号を残すことが起こる。By the way, when recording and/or reproducing is performed on a prepaid card with a high coercive force of the magnetic surface of the magnetic medium using a magnetic head core or a laminated magnetic head core using the above-mentioned bulk material, before the card is saturated, The magnetic helad core becomes saturated with the input current, and when overriding (writing a different signal over a signal that has already been written to the magnetic medium), the previous signal may remain.
その結果、書き込み、読み取りのミスが発生することに
なる。また一方、近年のプリペイドカードの表面には種
々の印刷が行われ、しかも印刷層の厚みが厚くなってい
る。このため、磁性面の磁気媒体と磁気へラドコアとの
間隔か必然的に広がってしまい、より強い磁束を発生し
且つ透磁率の高い磁気ヘッドコアが必要となる。As a result, writing and reading errors will occur. On the other hand, in recent years, various kinds of printing have been performed on the surface of prepaid cards, and the thickness of the printing layer has become thicker. For this reason, the distance between the magnetic medium on the magnetic surface and the magnetic head core inevitably increases, and a magnetic head core that generates stronger magnetic flux and has higher magnetic permeability is required.
さらにこれからは、多目的な商品に使えるようなプリペ
イドカードの要望も考えられ、これに対応するためには
カードに記録される情報のセキュリティーを向上させる
必要かあり、そのため、カードの記録媒体の保磁力をよ
り一層大きくしたり、あるいは入出力信号を複雑な波形
にする必要かある。またカードの記録密度の向上や、再
生/記録速度の向上も要求される。Furthermore, from now on, there will be a demand for prepaid cards that can be used for multi-purpose products, and in order to meet this demand, it will be necessary to improve the security of the information recorded on the card. Is it necessary to make the input/output signals even larger, or to make the input/output signals have more complex waveforms? There is also a demand for improved card recording density and improved playback/recording speed.
これらの要望に磁気ヘッドが対応するためには、磁束密
度が大きく且つ透磁率が高く、低周波から高周波まで安
定した再生/記録特性を有する磁気へラドコアが必要と
される。すなわち、プリベートカードシステムにおける
記録時の使用周波数帯は1kHz〜10kHzの範囲で
あり、記録特性としてはこの範囲の周波数帯で磁束密度
が大きい方が強い磁力で書き込めるため、高保磁力媒体
には好都合である。また再生特性としては1 kFlz
〜100kHzでの周波数帯で最大透磁率か大きい方が
高速で読み取りかできるため好都合である。In order for a magnetic head to meet these demands, a magnetic rad core is required that has a large magnetic flux density, high magnetic permeability, and stable read/write characteristics from low frequencies to high frequencies. In other words, the frequency band used during recording in the private card system is in the range of 1 kHz to 10 kHz, and in terms of recording characteristics, the higher the magnetic flux density in this frequency band, the stronger the magnetic force can be used for writing, which is advantageous for high coercive force media. It is. Also, the playback characteristics are 1 kFlz
A larger maximum permeability in the frequency band of ~100 kHz is advantageous because it allows for faster reading.
そこで、本発明者等は、上記の要望等に応えるべく高磁
束密度、高透磁率を有する磁気へラドコアの開発を目的
とし、耐摩耗性、耐食性に優れているFe−5i−AI
系合金を使用し、特に磁気特性の挙動に着目して研究を
重ねてきた。その結果、厚さが0.1mm以下の薄板コ
ア材を積層した磁気ヘッドコアは、バルク材による磁気
へラドコアに比較して磁気特性に優れていることを確認
すると共に、積層磁気ヘッドコアは、薄板コア材の積層
枚数に関係なく磁気特性が一定である事を見出し、本発
明を完成するに至ったものである。Therefore, in order to meet the above demands, the present inventors aimed to develop a magnetic helad core with high magnetic flux density and high magnetic permeability, using Fe-5i-AI which has excellent wear resistance and corrosion resistance.
We have conducted repeated research using alloys with a particular focus on the behavior of magnetic properties. As a result, it was confirmed that a magnetic head core made of laminated thin plate core materials with a thickness of 0.1 mm or less has superior magnetic properties compared to a magnetic helad core made of bulk material. It was discovered that the magnetic properties are constant regardless of the number of laminated materials, and this led to the completion of the present invention.
(課題を解決するための手段〕
上述の如き経緯によって開発された、本発明に係わるプ
リペイドカード用磁気ヘッドコアは、厚さが0.1mm
以下のセンダスト系合金の薄板を、厚さ方向に所定枚数
積層して形成されてなるものである。(Means for Solving the Problems) The magnetic head core for prepaid cards according to the present invention, which was developed as described above, has a thickness of 0.1 mm.
It is formed by laminating a predetermined number of thin plates of the following sendust alloy in the thickness direction.
Si :8.5*t%、 Al:5.5wt%、残りF
eからなるFe−3i−A1合金平板を常法により製造
し、この平板から機械加工により、本発明に係わる60
.80. 100μm厚さのバルクコア材と、比較例の
120.150.200μm厚さのバルクコア材とを取
り、このコア材を各厚さ毎に積層して厚さ2.4mmの
積層バルクコアを製造した。また前記平板から比較材と
して、機械加工により厚さ2.4mmのバルクコアを製
造した。一方、同成分のFe−5i−A1合金溶湯から
、双ロール法により線速度200m/分の条件で厚さ6
01.tmの本発明に係わる薄帯を製造し、これを積層
して前記と同形状の積層コアを製造した。Si: 8.5*t%, Al: 5.5wt%, remaining F
A Fe-3i-A1 alloy flat plate consisting of
.. 80. A bulk core material with a thickness of 100 μm and a bulk core material with a thickness of 120, 150, and 200 μm of a comparative example were taken, and the core materials were laminated for each thickness to produce a laminated bulk core with a thickness of 2.4 mm. In addition, a bulk core having a thickness of 2.4 mm was manufactured from the flat plate as a comparative material by machining. On the other hand, from a Fe-5i-A1 alloy molten metal with the same composition, a thickness of 6 mm was obtained using the twin roll method at a linear speed of 200 m/min.
01. tm ribbons according to the present invention were produced and laminated to produce a laminated core having the same shape as above.
これらのコアを用いて、周波数を変えた時の磁束密度、
最大透磁率を測定した。この測定結果を第1図乃至第2
図に示す。Using these cores, the magnetic flux density when changing the frequency,
The maximum permeability was measured. This measurement result is shown in Figures 1 to 2.
As shown in the figure.
第1図乃至第2図より明らかなように、100μm(0
,IIIIQ+)以下の厚さのコア材を積層した本発明
コアでは、磁束密度、最大透磁率共に、プリベートカー
ドシステムにおける記録時の使用周波数帯である1kH
z−10k)Izを含む低周波数から1OkHzまてほ
とんと低下がなく、高磁束密度、高透磁率か得られるか
、比較例の120μm以上の厚さのコア材を積層したコ
ア、あるいはバルクコアでは、1kHz〜10kHzの
範囲で低下か見られ高磁束密度、高透磁率が得られない
。また本発明コアは、10kHz〜100kHzにおけ
る最大透磁率においても、その絶対値か比較例のそれに
比べて2倍以上もあり、このように最大透磁率が大きい
ことから、プリベートカードシステムの再生時の高速読
み取りかでき、再生特性に優れる。As is clear from Figures 1 and 2, 100 μm (0 μm)
, IIIQ+) In the core of the present invention, which is made of laminated core materials having a thickness of less than
z-10k) There is almost no drop from low frequencies including Iz to 1OkHz, and high magnetic flux density and high magnetic permeability can be obtained. , a decrease is seen in the range of 1 kHz to 10 kHz, and high magnetic flux density and high magnetic permeability cannot be obtained. In addition, the absolute value of the core of the present invention has a maximum magnetic permeability between 10 kHz and 100 kHz, which is more than twice that of the comparative example. It can read at high speed and has excellent playback characteristics.
また、第1図乃至第2図より明らかなように、厚さの薄
いコア材を積層する方が高磁束密度、高透磁率が得られ
る傾向にあるか、そのコア材の厚さの下限値としては3
0μm程度が望ましく、これより薄くなると、コア材自
体の製造が難しくなるとともに、コア材の積層もし難く
なる。In addition, as is clear from Figures 1 and 2, there is a tendency to obtain higher magnetic flux density and higher magnetic permeability by laminating thinner core materials, or the lower limit of the thickness of the core materials. As for 3
A thickness of about 0 μm is desirable; if it is thinner than this, it becomes difficult to manufacture the core material itself, and it also becomes difficult to laminate the core materials.
尚、双ロール法により得た薄帯の積層コアが最も特性の
劣化が少ない理由は、バルク材より得たコア材よりも結
晶粒が微細で、且つ第3図に示すように、薄帯の横断面
における金属組織か、中央部に粒状品層を有しその上下
に柱状晶層を有する組織となっている為と考える。The reason why the laminated core of the ribbon obtained by the twin-roll method has the least deterioration in properties is that the crystal grains are finer than that of the core material obtained from bulk material, and as shown in Figure 3, the laminated core of the ribbon This is thought to be due to the metal structure in the cross section, or the structure having a granular layer in the center and columnar crystal layers above and below it.
次に、双ロール法により得た厚さ60μmの薄帯と機械
加工により得た厚さ60μmの薄板コア材とを、各々積
層枚数を変え種々の厚さのコアを製造した。そして、こ
れらコアの1kHz、 10kHz、 100kHz
での交流透磁率(初透磁率)と磁場100eにおける最
大磁束密度を測定した。この測定結果を第4図および第
5図にそれぞれ示す。Next, cores of various thicknesses were manufactured by changing the number of laminated layers of a 60 μm thick ribbon obtained by the twin roll method and a 60 μm thick thin plate core material obtained by machining. And 1kHz, 10kHz, 100kHz of these cores
The AC magnetic permeability (initial magnetic permeability) at 100 e and the maximum magnetic flux density at a magnetic field of 100 e were measured. The measurement results are shown in FIGS. 4 and 5, respectively.
第4図乃至第5図より明らかなように、コア材の積層枚
数に係わりなく交流透磁率(初透磁率)と磁束密度は一
定であり、本発明に係わる厚さが100μm(0,1m
m)以下のコア材であれば、いかなる厚みの積層コアで
あっても磁気特性の劣化が無いことが分かる。As is clear from FIGS. 4 and 5, the AC magnetic permeability (initial magnetic permeability) and magnetic flux density are constant regardless of the number of laminated core materials, and the thickness according to the present invention is 100 μm (0.1 m
m) It can be seen that if the core material is as follows, there is no deterioration in magnetic properties no matter what thickness the laminated core is.
以上の説明において、本発明に係わるセンダスト系合金
としてFe−5i−A1合金を代表例として説明したが
、他にFe−5i−Co、 Fe−5i−Ge、 Fe
−Al−Ga等のセンダスト系合金も勿論適用可能であ
る。In the above explanation, the Fe-5i-A1 alloy was explained as a representative example of the sendust alloy according to the present invention, but other alloys such as Fe-5i-Co, Fe-5i-Ge, Fe
Of course, sendust alloys such as -Al-Ga are also applicable.
上述したように、本発明に係わるプリペイドカード用磁
気ヘッドコアによれば、高磁束密度且つ高透磁率の磁気
特性が得られるので、磁性面の磁気媒体の保磁力が高い
プリペイドカードや、表面に種々の印刷が施されたプリ
ペイドカードや、記録される情報密度の大きい多目的プ
リペイドカード等に対して、オーバライド時に、先の信
号を残すことなく処理ができ、従ってプリペイドカード
への書き込み、読み取りのミスを減少させることができ
る。As described above, according to the magnetic head core for prepaid cards according to the present invention, magnetic properties of high magnetic flux density and high magnetic permeability can be obtained, so that it can be used for prepaid cards with high coercive force of the magnetic medium on the magnetic surface, and for various types of magnetic media on the surface. When overriding prepaid cards printed with , multi-purpose prepaid cards with a high density of recorded information, etc., it is possible to process without leaving any previous signals, thus preventing errors in writing to or reading from the prepaid card. can be reduced.
第1図乃至第2図は、本発明に係わる積層コアの周波数
を変えた時の磁束密度、最大透磁率を、比較例のそれと
合わせて示す図、第3図は、本発明に係わるコア材の断
面金属組織図、第4図乃至第5図は、本発明に係わる積
層コアの厚さとコアの1kHz、 10kHz、100
kHzでの交流透磁率(初透磁率)、磁束密度との関係
を示す図である。
特許出願人 株式会社神戸製鋼所Figures 1 and 2 are diagrams showing the magnetic flux density and maximum magnetic permeability when the frequency of the laminated core according to the present invention is changed, together with those of a comparative example, and Figure 3 is a diagram showing the core material according to the present invention. The cross-sectional metallographic diagrams of FIGS. 4 and 5 show the thickness of the laminated core according to the present invention and the core frequencies of 1kHz, 10kHz, and
FIG. 3 is a diagram showing the relationship between AC magnetic permeability (initial magnetic permeability) and magnetic flux density at kHz. Patent applicant Kobe Steel, Ltd.
Claims (1)
厚さ方向に所定枚数積層して形成されてなることを特徴
とするプリペイドカード用磁気ヘッドコア。A thin plate of sendust alloy with a thickness of 0.1 mm or less,
A magnetic head core for a prepaid card, characterized in that it is formed by laminating a predetermined number of sheets in the thickness direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2248424A JPH04125905A (en) | 1990-09-17 | 1990-09-17 | Magnetic core head for prepaid card |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2248424A JPH04125905A (en) | 1990-09-17 | 1990-09-17 | Magnetic core head for prepaid card |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04125905A true JPH04125905A (en) | 1992-04-27 |
Family
ID=17177922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2248424A Pending JPH04125905A (en) | 1990-09-17 | 1990-09-17 | Magnetic core head for prepaid card |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04125905A (en) |
-
1990
- 1990-09-17 JP JP2248424A patent/JPH04125905A/en active Pending
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