JPH0428774Y2 - - Google Patents
Info
- Publication number
- JPH0428774Y2 JPH0428774Y2 JP1986069901U JP6990186U JPH0428774Y2 JP H0428774 Y2 JPH0428774 Y2 JP H0428774Y2 JP 1986069901 U JP1986069901 U JP 1986069901U JP 6990186 U JP6990186 U JP 6990186U JP H0428774 Y2 JPH0428774 Y2 JP H0428774Y2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- magnetic card
- voltage
- current detection
- heating element
- 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
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 230000007423 decrease Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は磁気カードリーダのサーマルマーキン
グ特にこれに使用する発熱体の構造に係る。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to thermal marking of a magnetic card reader, particularly to the structure of a heating element used therein.
従来この種の発熱体は１個の矩形又は円形の抵
抗体に通電してマーキングを行なう様に形成され
ており、この発熱体に通電すると密着された磁気
カードの感熱部材が発色するよう構成されてい
る。第３図はこの従来のサーマルマーキングに使
用されている抵抗体を示し単一の抵抗体１にスイ
ツチングトランジスタTRを直列に接続し、その
両端に直流電源VCCを接続し、マーキング時に制
御部SWが一定時間前記トランジスタTRをオン
し抵抗体１を発熱させるものである。
Conventionally, this type of heating element has been formed in such a way that a single rectangular or circular resistor is energized to make markings, and when this heating element is energized, the heat-sensitive member of the magnetic card that is in close contact with it becomes colored. ing. Figure 3 shows a resistor used in conventional thermal marking.A switching transistor TR is connected in series to a single resistor 1, and a DC power supply V CC is connected to both ends of the resistor 1. SW turns on the transistor TR for a certain period of time and causes the resistor 1 to generate heat.
しかしながら、発熱体の不良又は経年使用によ
る寿命によつて発熱体が断線する事があり、サー
マルマーキングが不能となることがある。このよ
うな場合回数券の使用回数又は残回数がマーキン
グされず磁気カード利用者が使用回数又は残回数
を確認できないことになる。
However, the heating element may become disconnected due to a defect in the heating element or its life due to long-term use, making thermal marking impossible. In such a case, the number of times the ticket has been used or the remaining number of times is not marked, making it impossible for the magnetic card user to confirm the number of times the ticket has been used or the number of remaining times.
本考案の目的は発熱体が断線してサーマルマー
キング機能を停止することのないよう、発熱体を
多分割し発熱体を流れる電流値の監視を行なうよ
うにしたもので信頼度の高いサーマルマーキング
機能を備えた磁気カードリーダを提供することに
ある。 The purpose of this invention is to divide the heating element into multiple parts and monitor the current value flowing through the heating element to prevent the thermal marking function from being interrupted due to disconnection of the heating element, thereby achieving highly reliable thermal marking function. The purpose of the present invention is to provide a magnetic card reader equipped with the following functions.
本考案は並列に多分割された磁気カードに密着
された発熱体と、一定時間スイツチングオンする
トランジスタ並に電流検知用抵抗を夫々直列に接
続し、前記電流検知用抵抗に生ずる電圧値の変化
を電圧比較回路により監視するようにしてなる磁
気カードリーダである。なお前記並列接続された
各抵抗はそれぞれ抵抗値が異なる方がよい。
The present invention connects in series a heating element that is closely attached to a magnetic card that is divided into multiple parts in parallel, a transistor that switches on for a certain period of time, and a current detection resistor, and changes in the voltage value that occur in the current detection resistor. This is a magnetic card reader that monitors the voltage using a voltage comparison circuit. Note that it is preferable that the resistors connected in parallel have different resistance values.
過熱又は経年使用により抵抗の一部が破損して
電流が減少してもサーマルマーキング機能が全部
失われることはない。電流の減少を監視してサー
マルマーキングの状態を監視することができる。
Even if a part of the resistor is damaged due to overheating or aging, the thermal marking function will not be completely lost even if the current decreases. The state of the thermal marking can be monitored by monitoring the decrease in current.
第１図は本考案による抵抗体１１を示し、この
例では抵抗体が４個並列接続されている。従つて
一部の抵抗体が断線しサーマルマーキングの一部
が発色しない場合でも他の抵抗体が発熱しマーキ
ング機能は停止しない。第２図はこの抵抗体に流
れる電流の駆動回路を示す。図において多数個の
発熱体は定電圧電源CVより一定電圧で抵抗体R1
〜Roを並列に通電するため電流検出用抵抗RVに
は、抵抗体R1〜Roに流れる電流に対応した電圧
が生ずる。
FIG. 1 shows a resistor 11 according to the present invention, and in this example, four resistors are connected in parallel. Therefore, even if some of the resistors are disconnected and some of the thermal markings do not develop color, other resistors will generate heat and the marking function will not stop. FIG. 2 shows a drive circuit for the current flowing through this resistor. In the figure, a large number of heating elements are connected to a resistor R 1 at a constant voltage from a constant voltage power supply CV.
Since the resistors R 1 to R o are energized in parallel, a voltage corresponding to the current flowing through the resistors R 1 to R o is generated in the current detection resistor RV.
したがつて抵抗体R1，R2…の何れかが断線す
ると電流検出用抵抗RVに流れる電流が減少し電
流検出用抵抗RVの両端に生ずる電圧が低下す
る。電圧比較回路CMPは前記電流検出用抵抗RV
の端子電圧を、比較電圧すなわち抵抗体の断線が
一定個数に達した時の電圧と比較して、例えば比
較電圧よりも電流検出用抵抗RVの端子電圧が低
くなれば低レベルの信号を出力する。 Therefore, if any of the resistors R 1 , R 2 . . . is disconnected, the current flowing through the current detection resistor RV decreases, and the voltage generated across the current detection resistor RV decreases. The voltage comparison circuit CMP is connected to the current detection resistor RV.
The terminal voltage of is compared with the comparison voltage, that is, the voltage when a certain number of resistors are broken, and if the terminal voltage of the current detection resistor RV becomes lower than the comparison voltage, a low-level signal is output. .
以上述べたように、本考案によれば一部の発熱
体が断線した場合でもマーキングの一部が欠落す
るにとどまりマーキングの欠落が一定量を越える
と異常信号SIGが出力されるためこの信号を図示
しないコンピユータ等により読み取り、ランプ、
ブザー等によつて外部に知らせる事ができ、サー
マルマーキング機能を失なう事なく事前に点検修
理が可能となる。 As described above, according to the present invention, even if some of the heating elements are disconnected, only a part of the marking will be missing, and if the missing amount of the marking exceeds a certain amount, the abnormal signal SIG will be output, Read by a computer (not shown), lamp, etc.
This can be notified to the outside by a buzzer, etc., and inspection and repair can be carried out in advance without losing the thermal marking function.
本考案によれば発熱体の焼損を未然に監視し、
信頼性の高い磁気カードリーダを実現することが
できる。
According to the present invention, burnout of the heating element can be monitored in advance,
A highly reliable magnetic card reader can be realized.
第１図は本考案に用いられる抵抗体の配列を示
す図、第２図は本考案による磁気カードリーダに
密着される抵抗体の駆動回路を示す。第３図は従
来の磁気カードリーダに用いられる抵抗体、第４
図はその駆動回路を示す。
図において、１，１１，R1，R2，R3，R4……
抵抗体、RV……電流検出用抵抗、VCC……電源
電圧、TR……スイツチング、トランス、SW…
…制御部、CV……定電流電源、CMP……電圧比
較回路、SIG……異常信号。
FIG. 1 is a diagram showing an arrangement of resistors used in the present invention, and FIG. 2 is a diagram showing a drive circuit for the resistors closely attached to a magnetic card reader according to the present invention. Figure 3 shows a resistor used in a conventional magnetic card reader;
The figure shows its driving circuit. In the figure, 1, 11, R 1 , R 2 , R 3 , R 4 ...
Resistor, RV...Resistor for current detection, V CC ...Power supply voltage, TR...Switching, transformer, SW...
...Control unit, CV...Constant current power supply, CMP...Voltage comparison circuit, SIG...Abnormal signal.
Claims (1)
体と、一定時間スイツチングオンさせるトランジ
スタ並に電流検知用抵抗を夫々直列に接続し、前
記電流検知用抵抗に生ずる電圧値の変化を電圧比
較回路により監視するようにしてなる磁気カード
リーダ。 A voltage comparator circuit connects a heating element that is multi-divided in parallel and closely attached to a magnetic card, a transistor that is switched on for a certain period of time, and a current detection resistor in series, and detects the change in voltage value that occurs in the current detection resistor. A magnetic card reader that can be monitored by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986069901U JPH0428774Y2 (en) | 1986-05-12 | 1986-05-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986069901U JPH0428774Y2 (en) | 1986-05-12 | 1986-05-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62182742U JPS62182742U (en) | 1987-11-19 |
| JPH0428774Y2 true JPH0428774Y2 (en) | 1992-07-13 |
Family
ID=30911040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986069901U Expired JPH0428774Y2 (en) | 1986-05-12 | 1986-05-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0428774Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6092876A (en) * | 1983-10-27 | 1985-05-24 | Tokyo Electric Co Ltd | Thermal printer |
| JPS60159662A (en) * | 1984-01-31 | 1985-08-21 | Tokyo Electric Co Ltd | Apparatus for detecting fault of heat generating body in thermal head |
-
1986
- 1986-05-12 JP JP1986069901U patent/JPH0428774Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6092876A (en) * | 1983-10-27 | 1985-05-24 | Tokyo Electric Co Ltd | Thermal printer |
| JPS60159662A (en) * | 1984-01-31 | 1985-08-21 | Tokyo Electric Co Ltd | Apparatus for detecting fault of heat generating body in thermal head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62182742U (en) | 1987-11-19 |
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