JPS6339966B2 - - Google Patents
Info
- Publication number
- JPS6339966B2 JPS6339966B2 JP41279A JP41279A JPS6339966B2 JP S6339966 B2 JPS6339966 B2 JP S6339966B2 JP 41279 A JP41279 A JP 41279A JP 41279 A JP41279 A JP 41279A JP S6339966 B2 JPS6339966 B2 JP S6339966B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording
- head
- reproducing
- card
- 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
Links
- 230000004907 flux Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】
本発明は偽造、悪用などを防止するための保護
機能を設けた磁気カードの記録再生装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic card recording/reproducing device provided with a protection function to prevent forgery, abuse, etc.
従来のこの種の装置としては、磁気記録再生機
能を有する磁性膜のみを塗布した磁気カードを使
用し、カード上の磁性膜とヘツドとにより磁気的
に記録再生を行なうことが一般に実施されてい
る。したがつて、磁気カードの記録再生は一般の
ヘツドによつても可能であり、通常の技術を利用
して磁気カードを偽造、悪用されることが予想さ
れる。 Conventional devices of this type generally use a magnetic card coated with only a magnetic film that has a magnetic recording and reproducing function, and magnetically perform recording and reproducing using the magnetic film on the card and the head. . Therefore, it is possible to record and reproduce data on magnetic cards using ordinary heads, and it is expected that magnetic cards will be counterfeited or misused using ordinary techniques.
本発明はこれらの欠点を解決するため、保護機
能を有する磁気カードを使用し、前記磁気カード
の記録再生を行なうために特殊な手段を設けたも
ので、以下図面について詳細に説明する。 In order to solve these drawbacks, the present invention uses a magnetic card with a protection function and provides special means for recording and reproducing the magnetic card.The present invention will be described in detail with reference to the drawings below.
第１図は本発明の装置に使用する磁気カードの
断面図である。図において、１はプラスチツクシ
ート、２はγ―Fe2O3などの磁気的に記録再生す
るに適した高い保磁力を有する磁性膜で、磁性膜
２はプラスチツクシート１の上に10μｍ程度の厚
さでストライプ状に塗布されている。３はパーマ
ロイなどの磁気的に記録再生するには適さない保
磁力がほぼ零の磁性媒体で、磁性媒体３は磁性膜
２の上に5μｍ程度の厚さで塗布されている。 FIG. 1 is a sectional view of a magnetic card used in the device of the present invention. In the figure, 1 is a plastic sheet, 2 is a magnetic film such as γ-Fe 2 O 3 , which has a high coercive force suitable for magnetic recording and reproducing. It is painted in stripes. Reference numeral 3 is a magnetic medium such as Permalloy having a coercive force of almost zero, which is not suitable for magnetic recording and reproduction, and the magnetic medium 3 is coated on the magnetic film 2 to a thickness of about 5 μm.
第２図は第１図の磁気カードの動作を説明する
ための図であつて、磁気カードの断面を１部破断
して示している。図において４は記録用ヘツドコ
ア、５は再生用ヘツドコア、６は記録用コイル、
７は再生用コイルである。記録用コイル６に電流
を印加し、磁気カードに記録する場合、主磁束路
は実線で示すようにコア４、磁性媒体３で形成さ
れ、磁性膜２はほとんど励磁されず、電流を取り
去つた状態では、磁性媒体３の保磁力がほぼ零で
あることから、記録を行なうことはできない。ま
た、再生において磁性膜２が磁化状態にあつて
も、主磁束路は破線で示すように磁性膜２、磁性
媒体３で形成されるため、すなわち磁性媒体３で
磁気遮へいされるため、コア５にはほとんど磁束
が流れず、再生を行なうことはできない。したが
つて、一般の記録再生ヘツドにおいては、本発明
の装置に使用する磁気カードの記録再生は不可能
であり、偽造、悪用を防止することができる。 FIG. 2 is a diagram for explaining the operation of the magnetic card shown in FIG. 1, and shows a partially broken cross section of the magnetic card. In the figure, 4 is a recording head core, 5 is a reproduction head core, 6 is a recording coil,
7 is a reproduction coil. When a current is applied to the recording coil 6 to record on a magnetic card, the main magnetic flux path is formed by the core 4 and the magnetic medium 3 as shown by the solid line, and the magnetic film 2 is hardly excited and the current is removed. In this state, since the coercive force of the magnetic medium 3 is almost zero, recording cannot be performed. Furthermore, even when the magnetic film 2 is in a magnetized state during reproduction, the main magnetic flux path is formed by the magnetic film 2 and the magnetic medium 3 as shown by the broken line, that is, it is magnetically shielded by the magnetic medium 3, so the core 5 Almost no magnetic flux flows through it, and regeneration cannot take place. Therefore, it is impossible for a general recording/reproducing head to record/reproduce information on the magnetic card used in the device of the present invention, and counterfeiting and misuse can be prevented.
第３図は本発明の装置のヘツドの斜視図であつ
て、８は磁気飽和用ヘツドコアであり、９は励磁
用の永久磁石である。磁気飽和用ヘツドコア８の
磁気カードとの接触面は、記録、再生ヘツドのコ
ア４，５の磁気カードとの接触面と同一平面上に
なるように設定されている。さらに、コア８の空
隙部はコア４，５の空隙部を包含するように構成
されている。また、永久磁石９の磁化力は磁性媒
体３を磁気飽和させる程度のものであり、磁性膜
２の保磁力が大きいために、磁性膜２に影響を与
えることはない。 第４図は本発明の装置の動作
を説明するための図であつて、ヘツドおよび磁気
カード断面を１部破断して示している。コア８が
接触した部分の磁性媒体３は永久磁石９、コア
８、磁性媒体３と磁束路が形成され、磁性媒体３
の１部は○・印で示すように紙面に垂直な方向に磁
気飽和状態となる。この状態で記録用コイル６に
電流を印加すると磁性媒体３が磁気飽和状態であ
るために、磁束路は実線で示すようにコア４、磁
性膜２で形成され、磁性膜２の保磁力によつて、
電流を取り去つても磁性膜２に磁化が残り、記録
を保持することができる。再生においては磁性膜
２が磁化状態にあると、ヘツドが接触していない
状態では磁束路は磁性膜２、磁性媒体３で形成さ
れ、すなわち磁性膜２の磁化は磁性媒体３で磁気
遮へいされるが、ヘツドが接触した状態では、磁
性媒体３が磁気飽和状態となり、磁束路は破線で
示すように磁性膜２、コア５で形成され、再生用
コイル７に電流が生じ再生を行なうことができ
る。 FIG. 3 is a perspective view of the head of the apparatus of the present invention, where 8 is a head core for magnetic saturation, and 9 is a permanent magnet for excitation. The contact surface of the magnetic saturation head core 8 with the magnetic card is set to be on the same plane as the contact surface of the cores 4 and 5 of the recording/reproducing head with the magnetic card. Furthermore, the cavity of the core 8 is configured to include the cavities of the cores 4 and 5. Further, the magnetizing force of the permanent magnet 9 is sufficient to magnetically saturate the magnetic medium 3, and since the coercive force of the magnetic film 2 is large, it does not affect the magnetic film 2. FIG. 4 is a diagram for explaining the operation of the apparatus of the present invention, and shows a cross section of the head and the magnetic card with a portion cut away. A magnetic flux path is formed between the permanent magnet 9, the core 8, and the magnetic medium 3 in the portion of the magnetic medium 3 in contact with the core 8, and the magnetic medium 3
A part of the area becomes magnetically saturated in the direction perpendicular to the plane of the paper, as indicated by the circle. When a current is applied to the recording coil 6 in this state, the magnetic medium 3 is in a magnetically saturated state, so the magnetic flux path is formed by the core 4 and the magnetic film 2 as shown by the solid line, and is caused by the coercive force of the magnetic film 2. Then,
Even if the current is removed, magnetization remains in the magnetic film 2 and recording can be maintained. During reproduction, when the magnetic film 2 is in a magnetized state, a magnetic flux path is formed by the magnetic film 2 and the magnetic medium 3 when the head is not in contact with it, that is, the magnetization of the magnetic film 2 is magnetically shielded by the magnetic medium 3. However, when the heads are in contact, the magnetic medium 3 becomes magnetically saturated, a magnetic flux path is formed by the magnetic film 2 and the core 5 as shown by the broken line, and a current is generated in the reproducing coil 7 to perform reproduction. .
第５図は本発明の装置のヘツドの他の実施例で
あつて、１０は磁気飽和用コイルである。記録再
生時と同期をとつてコイル１０に電流を印加する
ことにより、永久磁石の場合と同様の効果を得る
ことができる。通常、コイル１０には磁性媒体を
磁気飽和させ得る程度の小さい電流を流すが、磁
性膜の磁化を反転しうる程度の電流を流すことに
より、磁性膜の記録の消磁も行なうことができ
る。 FIG. 5 shows another embodiment of the head of the apparatus of the present invention, in which 10 is a magnetic saturation coil. By applying a current to the coil 10 in synchronization with the recording/reproduction time, the same effect as with a permanent magnet can be obtained. Normally, a small current that can magnetically saturate the magnetic medium is passed through the coil 10, but by passing a current that is large enough to reverse the magnetization of the magnetic film, recording on the magnetic film can also be demagnetized.
なお、コア４として一般のヘツドより飽和磁束
密度の大きい、たとえばセンダストなどの材質の
ものを用いた場合には、第２図の実線で示した磁
束の他に磁性膜２を通る磁束も供給することがで
きる。すなわち、磁気カードに記録する場合に
は、必ずしもコイル１０に電流を印加する必要は
なく、少なくとも再生の間だけ磁性媒体３を磁気
飽和させればよい。 If the core 4 is made of a material such as Sendust, which has a higher saturation magnetic flux density than a general head, the magnetic flux passing through the magnetic film 2 will be supplied in addition to the magnetic flux shown by the solid line in Fig. 2. be able to. That is, when recording on a magnetic card, it is not necessarily necessary to apply a current to the coil 10, and it is sufficient to magnetically saturate the magnetic medium 3 only during reproduction at least.
以上説明したように、本発明によれば磁性膜の
上に磁性媒体を塗布した磁気カードを用い、記録
再生ヘツドの他に磁性媒体を磁気飽和するための
手段を設けて、前記磁気カードの記録再生を行な
うものであり、一般の記録再生ヘツドによつて
は、前記磁気カードの記録再生ができず、磁気カ
ードの偽造、悪用を防止することができる。 As explained above, according to the present invention, a magnetic card in which a magnetic medium is coated on a magnetic film is used, and means for magnetically saturating the magnetic medium in addition to the recording/reproducing head is provided to record data on the magnetic card. Since a general recording/reproducing head cannot record or reproduce information on the magnetic card, counterfeiting and misuse of the magnetic card can be prevented.
第１図は本発明の装置に使用する磁気カードの
断面図、第２図は第１図の磁気カードの動作を説
明するための図、第３図は本発明の装置のヘツド
の斜視図、第４図は本発明の装置の動作を説明す
るための図、第５図は本発明の装置のヘツドの他
の実施例の斜視図である。
１…プラスチツクシート、２…磁性膜、３…磁
性媒体、４…記録用ヘツドコア、５…再生用ヘツ
ドコア、６…記録用コイル、７…再生用コイル、
８…磁気飽和用ヘツドコア、９…永久磁石、１０
…磁気飽和用コイル。
FIG. 1 is a sectional view of a magnetic card used in the device of the present invention, FIG. 2 is a diagram for explaining the operation of the magnetic card of FIG. 1, and FIG. 3 is a perspective view of the head of the device of the present invention. FIG. 4 is a diagram for explaining the operation of the apparatus of the present invention, and FIG. 5 is a perspective view of another embodiment of the head of the apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Plastic sheet, 2... Magnetic film, 3... Magnetic medium, 4... Recording head core, 5... Reproducing head core, 6... Recording coil, 7... Reproducing coil,
8... Head core for magnetic saturation, 9... Permanent magnet, 10
...Magnetic saturation coil.
Claims (1)
力がほぼ零の磁性媒体が積層された磁気カードを
使用し、前記磁性膜を記録再生するヘツドと記録
再生の少なくとも再生の間前記磁性媒体を磁気飽
和させる手段とを有することを特徴とする磁気カ
ード記録再生装置。1. A magnetic card in which a magnetic medium with a coercive force of approximately zero is laminated on a magnetic film having a magnetic recording/reproducing function is used, and a head for recording/reproducing the magnetic film and the magnetic medium at least during the recording/reproducing are used. 1. A magnetic card recording/reproducing device comprising means for magnetic saturation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41279A JPS5593514A (en) | 1979-01-09 | 1979-01-09 | Magnetic card recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41279A JPS5593514A (en) | 1979-01-09 | 1979-01-09 | Magnetic card recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5593514A JPS5593514A (en) | 1980-07-16 |
| JPS6339966B2 true JPS6339966B2 (en) | 1988-08-09 |
Family
ID=11473075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP41279A Granted JPS5593514A (en) | 1979-01-09 | 1979-01-09 | Magnetic card recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5593514A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827881B2 (en) * | 1979-08-24 | 1983-06-13 | 東北金属工業株式会社 | magnetic recording and reproducing device |
| JPS6177137A (en) * | 1984-09-22 | 1986-04-19 | Kyodo Printing Co Ltd | Magnetic recording medium |
| JPS6179867U (en) * | 1984-10-29 | 1986-05-28 | ||
| JPS6233323A (en) * | 1985-08-06 | 1987-02-13 | Tomoegawa Paper Co Ltd | Heat sensitive magnetic recording medium |
| JPS6233325A (en) * | 1985-08-06 | 1987-02-13 | Tomoegawa Paper Co Ltd | Heat sensitive magnetic recording medium |
| JP2743960B2 (en) * | 1986-02-17 | 1998-04-28 | 日本電信電話株式会社 | Magnetic card |
| JPS62204430A (en) * | 1986-03-03 | 1987-09-09 | Nippon Telegr & Teleph Corp <Ntt> | Magnetic card |
| JPS63102010U (en) * | 1986-12-20 | 1988-07-02 | ||
| JPS645210U (en) * | 1987-06-29 | 1989-01-12 | ||
| US9161484B2 (en) | 2010-09-26 | 2015-10-13 | Access Business Group International Llc | Selectively controllable electromagnetic shielding |
-
1979
- 1979-01-09 JP JP41279A patent/JPS5593514A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5593514A (en) | 1980-07-16 |
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