JPH01189002A - Magnetic head circuit exclusive-use for deleting - Google Patents
Magnetic head circuit exclusive-use for deletingInfo
- Publication number
- JPH01189002A JPH01189002A JP1086488A JP1086488A JPH01189002A JP H01189002 A JPH01189002 A JP H01189002A JP 1086488 A JP1086488 A JP 1086488A JP 1086488 A JP1086488 A JP 1086488A JP H01189002 A JPH01189002 A JP H01189002A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- data
- magnetic head
- terminals
- recording medium
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims description 19
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は磁気ヘッドに関し、特に、磁気カード等の磁気
記録媒体に記録されたデータを消去するためだけに用い
られる消去専用磁気ヘッド回路に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic head, and particularly to an erasing-only magnetic head circuit used solely for erasing data recorded on a magnetic recording medium such as a magnetic card. It is.
最近、キャッシュカード、テレホンカード、及びクレジ
ットカード等の磁気カードが普及し、カード時代の到来
と言われている。この磁気カードの普及に伴ない、磁気
カーげにデータを書き込んだり磁気カードからデータを
読み出すことが可能な装置、所謂、磁気カードリーダラ
イタも発売され、一般の人にも磁気カードリーダライタ
が容易に手に入るようになってきた。このため、磁気カ
ーＰの偽造防止対策が急務となっている。Recently, magnetic cards such as cash cards, telephone cards, and credit cards have become widespread, and it is said that the era of cards has arrived. With the spread of magnetic cards, so-called magnetic card readers/writers, which are devices that can write data to and read data from magnetic cards, have also been released, making it easy for the general public to use magnetic card readers/writers. It's becoming available. Therefore, measures to prevent counterfeiting of the magnetic car P are urgently needed.
従来の磁気カードの偽造防止対策は、磁気カードへデー
タを記録する際の記録信号方式を改良したり、或いは磁
気ヘッドの構造を改良することにより行なわれている。Conventional measures to prevent counterfeiting of magnetic cards have been taken by improving the recording signal system used when recording data on magnetic cards, or by improving the structure of the magnetic head.
以下永日
〔発明が解決しようとする問題点〕
しかしながら、現在のところ、単独で万全というものが
ないので、上述した方法を組み合わせた偽造防止対策が
講じられているのが実状である。[Problem to be Solved by the Invention] As of now, however, there is no single method that is perfect for preventing counterfeiting, and the current situation is that counterfeit prevention measures are being taken that combine the above-mentioned methods.
本発明者らは、従来の対策で完全に磁気カードの偽造防
止ができないのは、従来の磁気ヘッドが書き込み機能を
持っているためであると考えだ。The inventors believe that the reason why conventional measures cannot completely prevent counterfeiting of magnetic cards is because conventional magnetic heads have a writing function.
従って１本発明の目的は、磁気ヘッドの構造を改良する
ことにより、磁気カード等の磁気記録媒体へデータを書
き込む機能を除去し、磁気記録媒体に記録されているデ
ータを消去することのみ可能な消去専用磁気ヘッド回路
を提供することにあＩ０
〔問題点を解決するための手段〕
本発明による消去専用磁気へノド回路はギャノｆを持っ
た磁気コアに巻回された巻線の両端子間に整流回路を接
続したことを特徴とする。Therefore, one object of the present invention is to improve the structure of the magnetic head, thereby eliminating the function of writing data to a magnetic recording medium such as a magnetic card, and making it possible only to erase data recorded on the magnetic recording medium. An object of the present invention is to provide a magnetic head circuit exclusively for erasing. [Means for solving the problems] A magnetic head circuit exclusively for erasing according to the present invention has a magnetic head circuit for erasing between both terminals of a winding wound around a magnetic core having a Gyan f. The feature is that a rectifier circuit is connected to the .
このような構成によると、磁気記録媒体にデータを書き
込もうとして整流回路を介し巻線間に電圧信号波形を印
加しようとしても１巻線間には整流回路により直流電圧
波形しか得られない。この直流電圧によシ巻線に流れる
直流電流では、磁気コアのギャップ近傍には一方向の漏
れ磁界しか生ぜず、磁気記録媒体は一方向にしか磁化さ
れない。According to such a configuration, even if an attempt is made to write data on a magnetic recording medium by applying a voltage signal waveform between the windings via the rectifier circuit, only a DC voltage waveform is obtained between each winding due to the rectifier circuit. The direct current flowing through the windings due to this direct current voltage only generates a leakage magnetic field in one direction near the gap in the magnetic core, and the magnetic recording medium is magnetized in only one direction.
従って、この消去専用磁気ヘッド回路では、磁気記録媒
体にデータを書き込むことができず、磁気記録媒体に記
録されているデータを消去することのみ可能である。Therefore, this erase-only magnetic head circuit cannot write data to the magnetic recording medium, but can only erase data recorded on the magnetic recording medium.
以下１本発明の実施例について図面を参照して説明する
。An embodiment of the present invention will be described below with reference to the drawings.
第１図を参照して１本発明の第１の実施例による消去専
用磁気ヘッド回路は、ギャップをもった磁気コア１と、
磁気コア１に巻回された巻線２からなる磁気ヘッドを有
する。巻線２の両端子■−■′間には整流回路３が接続
されている。本実施例の整流回路３は、′巻線２０両端
子■−■′間に接続されたコンデンサＣと巻線２の一方
の端子にカソードが接続されたダイオードＤ１とから成
る。ダイオー ドＤ１のアノードは端子■に接続され１
巻線２の端子■′は端子■′に接続されている。実際の
消去専用磁気ヘッド回路では、磁気ヘッドと整流回路３
とは一体に構成される。すなわち２巻線２の両端子■−
■′への整流回路３の接続は、磁気へノド内部で行なわ
れ、整流回路３の端子■−■′が本消去専用磁気ヘッド
回路の端子として外部回路と接続される。次に、このよ
うな構成の消去専用磁気ヘッド回路に、外部回路より電
流を流すことにより。Referring to FIG. 1, an erase-only magnetic head circuit according to a first embodiment of the present invention includes a magnetic core 1 having a gap,
It has a magnetic head consisting of a winding 2 wound around a magnetic core 1. A rectifier circuit 3 is connected between both terminals ■-■' of the winding 2. The rectifier circuit 3 of this embodiment includes a capacitor C connected between both terminals of the winding 20 and a diode D1 whose cathode is connected to one terminal of the winding 2. The anode of diode D1 is connected to terminal 1
Terminal ■' of winding 2 is connected to terminal ■'. In an actual erase-only magnetic head circuit, the magnetic head and the rectifier circuit 3
It is constructed integrally with. In other words, both terminals of winding 2 -
The connection of the rectifier circuit 3 to (1) is made inside the magnetic node, and terminals (2)-(2) of the rectifier circuit 3 are connected to an external circuit as terminals of the magnetic head circuit exclusively for erasure. Next, by applying current from an external circuit to the erase-only magnetic head circuit configured as described above.
磁気カード等の磁気記録媒体にデータを書き込もうとし
た場合について説明する。この場合、端子■−■′間に
書込み信号を印加しても、整流回路３てより巻線２の端
子■−■′間には整流された直流電圧が加わる。その為
１巻線２には直流電流しか流れず、磁気記録媒体にデー
タを書込むことができない。従って、もし磁気記録媒体
にデータが記録されていたとすれば、そのデータは消去
される。A case will be described in which an attempt is made to write data to a magnetic recording medium such as a magnetic card. In this case, even if a write signal is applied between the terminals ■-■', a rectified DC voltage is applied between the terminals ■-■' of the winding 2 by the rectifier circuit 3. Therefore, only direct current flows through the first winding 2, and data cannot be written to the magnetic recording medium. Therefore, if data has been recorded on the magnetic recording medium, that data will be erased.
なお１本発明は上記実施例に限定しないのは勿論である
。例えば、第２図に示されるように、第１図のダイオー
ドＤ１の代わりにトランジスタＴを使用しても良い。又
、第３図に示されるように。Note that the present invention is of course not limited to the above embodiments. For example, as shown in FIG. 2, a transistor T may be used in place of the diode D1 in FIG. Also, as shown in FIG.
第１図つ１個のダイオードＤ、の代わシに、コンデンサ
Ｃの両端子間に４個のダイオードＤ、 、 Ｄ２゜Ｄ５
及びＤ４からなるブリッジ整流器を接続しても良い。Instead of one diode D in Figure 1, four diodes D, , D2゜D5 are connected between both terminals of the capacitor C.
and D4 may be connected.
又、第３図のダイオードＤ１． Ｄ２． Ｄ、及びＤ４
の代わシに、第４図に示されるように、ツェナーダイオ
−トＺＤ７． ＺＤ２． ＺＤ、及びＺＤ４を用いても
良い。又。Also, the diode D1. in FIG. D2. D, and D4
Instead, as shown in FIG. 4, a Zener diode ZD7. ZD2. ZD and ZD4 may also be used. or.
上述した実施例の整流回路の代わシに、他の整流回路を
使用しても良いのは言うまでもない。It goes without saying that other rectifier circuits may be used in place of the rectifier circuits of the embodiments described above.
以上の説明で明らかなように８本発明によれば。 As is clear from the above description, according to the present invention.
ギャップを持った磁気コアに巻回された巻線の両端子間
に整碓回路を接続するという簡単な構造で。It has a simple structure in which a rectifying circuit is connected between both terminals of a winding wire wound around a magnetic core with a gap.
磁気カード等の磁気記録媒体へのデータの書込みを防止
することができる。従って１本発明による消去専用磁気
ヘッド回路は、磁気カードの偽造防止に大きな効果を発
揮する。Writing of data to a magnetic recording medium such as a magnetic card can be prevented. Therefore, the erase-only magnetic head circuit according to the present invention is highly effective in preventing counterfeiting of magnetic cards.
第１図は本発明の第１の実施例を示す回路図。
第２図は本発明の第２の実施例を示す回路図、第３図は
本発明の第３の実施例を示す回路図、第４図は本発明の
第４の実施例を示す回路図である。
１・・・磁気コア、２・・・巻線、３・・・整流回路。
第１図
第２図FIG. 1 is a circuit diagram showing a first embodiment of the present invention. Fig. 2 is a circuit diagram showing a second embodiment of the invention, Fig. 3 is a circuit diagram showing a third embodiment of the invention, and Fig. 4 is a circuit diagram showing a fourth embodiment of the invention. It is. 1... Magnetic core, 2... Winding wire, 3... Rectifier circuit. Figure 1 Figure 2
Claims (1)
た巻線とを有する磁気ヘッドにおいて、前記巻線の両端
子間に整流回路を接続したことを特徴とする消去専用磁
気ヘッド回路。 ２、前記整流回路が、前記巻線の両端子間に接続された
コンデンサと前記巻線の一方の端子に接続されたダイオ
ードを含む特許請求の範囲第１項記載の消去専用磁気ヘ
ッド回路。３、前記整流回路が、前記巻線の両端子間に
接続されたコンデンサと該コンデンサの両端子間に接続
されたブリッジ整流器を含む特許請求の範囲第１項記載
の消去専用磁気ヘッド回路。[Claims] 1. A magnetic head having a magnetic core with a gap and a winding wound around the magnetic core, characterized in that a rectifier circuit is connected between both terminals of the winding. Erase-only magnetic head circuit. 2. The erase-only magnetic head circuit according to claim 1, wherein the rectifier circuit includes a capacitor connected between both terminals of the winding and a diode connected to one terminal of the winding. 3. The erase-only magnetic head circuit according to claim 1, wherein the rectifier circuit includes a capacitor connected between both terminals of the winding and a bridge rectifier connected between both terminals of the capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63010864A JP2535198B2 (en) | 1988-01-22 | 1988-01-22 | Erase-only magnetic head circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63010864A JP2535198B2 (en) | 1988-01-22 | 1988-01-22 | Erase-only magnetic head circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01189002A true JPH01189002A (en) | 1989-07-28 |
| JP2535198B2 JP2535198B2 (en) | 1996-09-18 |
Family
ID=11762220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63010864A Expired - Lifetime JP2535198B2 (en) | 1988-01-22 | 1988-01-22 | Erase-only magnetic head circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2535198B2 (en) |
-
1988
- 1988-01-22 JP JP63010864A patent/JP2535198B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2535198B2 (en) | 1996-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01189002A (en) | Magnetic head circuit exclusive-use for deleting | |
| JPH05314424A (en) | Magnetic head | |
| JPH0619810B2 (en) | Magnetic head | |
| US5212602A (en) | Magnetic head having fuse within head case | |
| JPH0512838Y2 (en) | ||
| JPS6334522B2 (en) | ||
| JP2597328B2 (en) | Recording / reproducing method for three magnetic layer magnetic card | |
| EP0128535B1 (en) | Value-rated magnetic card writing and reading system, particularly for public telephony | |
| JPH01169707A (en) | Magnetic head circuit for recording on special medium | |
| JP2588030B2 (en) | Method of writing data on magnetic record carrier | |
| JPH0749601Y2 (en) | Magnetic recording / reproducing device | |
| JP2958667B2 (en) | High-density magnetic recording reading method | |
| JP3304222B2 (en) | How to use magnetic recording media | |
| JP2518620B2 (en) | Magnetic recording / reproducing method and apparatus | |
| JP3625068B2 (en) | Data recording and playback method | |
| JP2654047B2 (en) | Magnetic information writing device for read / write composite magnetic head | |
| JP2660966B2 (en) | Magnetic recording medium authenticity discrimination method | |
| JPH05325111A (en) | Magnetic recording medium confirming system | |
| JPH0413218A (en) | Magnetic card and recording/reproducing method | |
| JPS6334775A (en) | Data recording system | |
| JPH0346103A (en) | Reader/writer for magnetic head | |
| JPS63209004A (en) | Magnetic recording device | |
| JPS58172790A (en) | Information recording medium | |
| JPH01279406A (en) | Magnetic head | |
| JPH0376005A (en) | Method for writing data to magnetic card |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080627 Year of fee payment: 12 |