JPS61289480A - Ic card reader - Google Patents
Ic card readerInfo
- Publication number
- JPS61289480A JPS61289480A JP60131320A JP13132085A JPS61289480A JP S61289480 A JPS61289480 A JP S61289480A JP 60131320 A JP60131320 A JP 60131320A JP 13132085 A JP13132085 A JP 13132085A JP S61289480 A JPS61289480 A JP S61289480A
- Authority
- JP
- Japan
- Prior art keywords
- card
- contact
- voltage
- switch
- contacts
- 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
- 230000037431 insertion Effects 0.000 abstract description 10
- 238000003780 insertion Methods 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract 1
- 239000013256 coordination polymer Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/143—Detection of memory cassette insertion or removal; Continuity checks of supply or ground lines; Detection of supply variations, interruptions or levels ; Switching between alternative supplies
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Conveying Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は半導体記憶回路を内蔵したカード（所謂ＩＣカ
ード）に対して情報の記録・再生を行うＩＣカードリー
ダに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an IC card reader that records and reproduces information on and from a card (so-called IC card) containing a semiconductor memory circuit.
（従来の技術）
ＩＣカードの接点に接触端子を接触させて情報の記録・
再生を行うＩＣカードリーダが従来から知られている。(Prior art) Contact terminals are brought into contact with the contacts of an IC card to record and record information.
IC card readers that perform playback are conventionally known.
このカードリーダにおいては接触端子とＩＣカードの接
点との電気的接触が正常に行なわれていなくても、又Ｉ
Ｃカードでない異種カードが挿入されていたとしてもそ
れらの正常でない状態を事前に検出する能力が無く、一
旦は電源を入れて動作するかどうかを見る必要があった
。In this card reader, even if the electrical contact between the contact terminal and the contact point of the IC card is not made normally,
Even if a different type of card other than a C card was inserted, there was no ability to detect in advance if the card was in an abnormal state, and it was necessary to turn on the power and see if it worked.
（発明が解決しようとする問題点）
上記従来のＩＣカードリーダでは異種カード挿入などの
正常でない状態を検出する能力が無いので、ＩＣカード
の代りに導電性の異種の物体が挿入された場合などには
ＩＣカードへ給電する電源がショートしてホスト側に負
担を与え、又その物体の材質によって火災の原因ともな
る。(Problems to be Solved by the Invention) The conventional IC card reader described above does not have the ability to detect abnormal conditions such as insertion of a different type of card. In this case, the power supply that supplies power to the IC card may short-circuit, placing a burden on the host side, and depending on the material of the object, it may also cause a fire.
（問題点を解決するための手段）
本発明は接触端子とＩＣカードの接点とを接触させて情
報の記録・再生を行うようになしたＩＣカードリーダに
おいて、上記接触端子のうち少くとも２つの端子間の導
通状態を検出し、予め設定された基準値と上記検出値と
を比較する比較手段とを有する。(Means for Solving the Problems) The present invention provides an IC card reader that records and reproduces information by bringing contact terminals into contact with contacts of an IC card. It has comparison means for detecting the conduction state between the terminals and comparing the detected value with a preset reference value.
（作 用）
接触手段のうち少くとも２つの端子間の導通状態を検出
した値と予め設定された基準値とが比較手段により比較
され、この比較結果に基づいてＩＣカードが正規に挿入
されたか否かが判別可能となる。(Function) The comparison means compares the value that detects the continuity state between at least two terminals of the contact means with a preset reference value, and based on the comparison result, determines whether the IC card has been properly inserted. It becomes possible to determine whether or not.
（実 施 例） 第１図は本発明の一実施例の一部を示す。(Example) FIG. 1 shows a portion of an embodiment of the present invention.
この実施例は接触端子とＩＣカードの接点とを接触させ
て情報の記録・再生を行うようになしたＩＣカードリー
ダにおいて、ＩＣカードが正規に挿入されたか否かを判
別する手段を設けたものであり。This embodiment is an IC card reader that records and reproduces information by bringing contact terminals into contact with IC card contacts, and is equipped with means for determining whether or not the IC card has been properly inserted. Yes.
カード挿入部にＩＣカードが正規に挿入された場合ＩＣ
カード上の露出した複数の接点Ｃ１，Ｃ２，Ｃ３，Ｃ４
・・・・にそれぞれ接触端子Ｃ１ｌ、 Ｃ１２・・・・
が接触するようになっている。接触端子Ｃ１ｌは電流制
限用抵抗ＲＯとスイッチＳｖの並列回路を介して例えば
５ｖ程度の電源ラインＶｃｃに接続され、ＩＣカード上
の電源端子となる接点Ｃ１に接触する。接触端子Ｃ１２
は接地され、ＩＣカード上の接地端子となる接点Ｃ２に
接触する。また接触端子Ｃ１ｌは抵抗Ｒ１を介してレベ
ル比較器ＣＰの入力端子に接続されると共に抵抗Ｒ２を
介して接地される。If the IC card is properly inserted into the card insertion section, the IC
Multiple exposed contacts C1, C2, C3, C4 on the card
Contact terminals C1l and C12, respectively.
are in contact with each other. The contact terminal C1l is connected to a power line Vcc of about 5 V, for example, through a parallel circuit of a current limiting resistor RO and a switch Sv, and comes into contact with a contact C1 serving as a power terminal on the IC card. Contact terminal C12
is grounded and contacts contact C2, which serves as a ground terminal on the IC card. Further, the contact terminal C1l is connected to the input terminal of the level comparator CP via a resistor R1, and is grounded via a resistor R2.
ＩＣカードがカード挿入部に挿入されてＩＣカードの接
点ＣＩ、Ｃ２・・・・が接触端子Ｃ１ｌ、 Ｃ１２・・
・・に接触した後に電源が投入されるが、この時スイッ
チＳｖがオフで電源ラインＶｃｃから電流制限用抵抗Ｒ
Ｏ。When the IC card is inserted into the card insertion part, the contacts CI, C2, etc. of the IC card become the contact terminals C1l, C12, etc.
The power is turned on after contacting ..., but at this time the switch Sv is off and the current limiting resistor R is connected to the power line Vcc.
O.
接触端子Ｃ１ｌを介して、 ＩＣカードの接点Ｃ１に給
電され、かつ、ＩＣカードの接点Ｃ２が接触端子Ｃ１２
を介して接地される。そして接触端子Ｃ１ｌ、 Ｃ１２
間の導通状態が抵抗Ｒ２により検出され、その検出電圧
が抵抗Ｒ１を介してレベル比較器ＣＰに入力されて予め
設定された基準電圧Ｖ ｏ 、 ＶＬ、と比較される。Power is supplied to the contact C1 of the IC card via the contact terminal C1l, and the contact C2 of the IC card is connected to the contact terminal C12.
grounded through. and contact terminals C1l, C12
The conduction state between the two is detected by the resistor R2, and the detected voltage is input to the level comparator CP via the resistor R1 and compared with preset reference voltages Vo, VL.
ここにＡ点の電圧、つまり検出電圧はＩＣカードがカー
ド挿入部に正規に挿入された場合には一定範囲（基準電
圧Ｖ１４．ＶＬ、間）に入り、それ以外の場合には一定
範囲から外ずれる。ロジック部ＬＧはレベル比較器ＣＰ
の出力信号からＩＣか−ドがカード挿入部に正規に挿入
されたかどうかを判別して判別信号５１．５２をホスト
側へ出力すると共にホスト側から制御信号Ｓ３を受けて
スイッチＳｖを制御する。この場合判別信号Ｓ１はＡ点
の電圧が基準電圧ＶＨ。Here, the voltage at point A, that is, the detection voltage, falls within a certain range (between reference voltage V14 and VL) when the IC card is properly inserted into the card insertion part, and falls outside the certain range in other cases. It shifts. Logic part LG is level comparator CP
It is determined from the output signal whether the IC card is properly inserted into the card insertion section, and the determination signals 51 and 52 are outputted to the host side, and the switch Sv is controlled by receiving the control signal S3 from the host side. In this case, the voltage at point A of the discrimination signal S1 is the reference voltage VH.
ｖＬ、間の一定範囲に入っているか否かを示す信号であ
り、判別信号Ｓ２はＡ点の電圧が上記一定範囲より外ず
れている場合に基準電圧Ｖ）ｌより高いか基準電圧ｖＬ
より低いかを示す信号である。また制御信号Ｓ３は判別
信号Ｓ１に応じてスイッチＳｖをオン／オフさせる信号
であり、Ａ点の電圧が一定範囲に入っている場合にスイ
ッチＳｖをオンさせ、Ａ点の電圧が一定範囲より外ずれ
ている場合にスイッチＳＷをオフさせる。This is a signal indicating whether or not the voltage at point A is within a certain range between V) and VL, and the determination signal S2 is a signal indicating whether the voltage at point A is higher than the reference voltage V)l or not.
This is a signal indicating whether the temperature is lower. Further, the control signal S3 is a signal that turns on/off the switch Sv according to the discrimination signal S1, and turns on the switch Sv when the voltage at point A is within a certain range, and turns on the switch Sv when the voltage at point A is outside the certain range. If there is a deviation, turn off the switch SW.
第２図は種々の場合におけるＡ点の電圧を示す。FIG. 2 shows the voltage at point A in various cases.
まず接触端子Ｃ１ｌ、 Ｃ１２・・・・がＩＣカードの
逆向き挿入等によりＩＣカードの接点Ｃ１，Ｃ２・・・
・と正常に電気的接触を行なっていない場合Ｃケースｌ
）はＡ点の電位が基準電圧Ｖ）ｌより高くなり、判別信
号Ｓ１が接触端子Ｃ１ｌ、 Ｃ１２とＩＣカードの接点
ＣＩ、 Ｃ２との接続不良を示して判別信号Ｓ２が高レ
ベルになる。制御信号Ｓ３は判別信号Ｓ１によりスイッ
チオフ信号となり、ロジック回路ＬＧがスイッチＳｗを
オフのままとする。この場合判別信号Ｓ２によりＩＣカ
ード再挿入の指示（表示）が指示部にて行なわれ、ＩＣ
カードが正しく挿入しなおされる。またＩＣカードが正
しく挿入された場合（ケース２）ＩＣカードの接点Ｃ１
，Ｃ２間が抵抗Ｒ２と並列に接続されてＡ点の電圧が基
準電圧ＶＨ，ＶＬ、間に入り、判別信号Ｓｌが接触端子
Ｃ１ｌ、 Ｃ１２とＩＣカードの接点Ｃ１，Ｃ２との正
規接続を示す、よって制御信号Ｓ３がスイッチオン信号
に切り換えられてスイッチＳｖがオンした後に従来と同
様にＩＣカードに対する情報の記録・再生がなされる。First, the contact terminals C1l, C12, etc. are connected to the contacts C1, C2, etc. of the IC card by inserting the IC card in the reverse direction, etc.
・If there is no proper electrical contact with the
) becomes higher than the reference voltage V)l, the discrimination signal S1 indicates a poor connection between the contact terminals C1l, C12 and the contacts CI, C2 of the IC card, and the discrimination signal S2 becomes high level. The control signal S3 becomes a switch-off signal due to the discrimination signal S1, and the logic circuit LG keeps the switch Sw off. In this case, an instruction (display) to reinsert the IC card is given by the discrimination signal S2 in the instruction section, and the IC card is
The card is re-inserted correctly. Also, if the IC card is inserted correctly (Case 2), contact C1 of the IC card
, C2 are connected in parallel with the resistor R2, and the voltage at point A is between the reference voltages VH and VL, and the discrimination signal Sl indicates the normal connection between the contact terminals C1l and C12 and the contacts C1 and C2 of the IC card. Therefore, after the control signal S3 is switched to the switch-on signal and the switch Sv is turned on, information is recorded and reproduced on the IC card as in the conventional case.
またＩＣカードの代りに導電性の異種物体が挿入された
場合等（ケース３）には接触端子Ｃ１ｌ、 Ｃ１２が短
絡状態となってＡ点の電圧が基準電圧ｖしより低くなり
、判別信号Ｓ１が接触端子Ｃ１１゜Ｃ１２とＩＣカード
の接点ＣＩ、 Ｃ２との正規の接続でないことを示すと
共に判別信号Ｓ２が低レベルになる。In addition, when a conductive foreign object is inserted instead of an IC card (Case 3), the contact terminals C1l and C12 are short-circuited, and the voltage at point A becomes lower than the reference voltage V, causing the discrimination signal S1 This indicates that the contact terminals C11°C12 and the contacts CI and C2 of the IC card are not properly connected, and the discrimination signal S2 becomes low level.
よってこの判別信号５１． Ｓ２により警報器が作動し
てＩＣカード使用禁止表示などの警報を発し、制御信号
Ｓ３がスイッチオフ信号となってスイッチＳｖがオフの
ままとなる。したがって電源がショートされることばな
くなり、挿入された異種物体は電流制限用抵抗ＲＯによ
り大きな電流が流れず火災も発生しなくなる。Therefore, this discrimination signal 51. The alarm is activated by S2 to issue an alarm such as a display prohibiting the use of the IC card, and the control signal S3 becomes a switch-off signal and the switch Sv remains off. Therefore, the power supply will not be short-circuited, a large current will not flow through the inserted foreign object due to the current-limiting resistor RO, and no fire will occur.
なお上記実施例においてホスト側との信号５１〜Ｓ３の
やりとりを無くして内部で自動的にスイッチＳｖを制御
するようにしてもよい。In the above embodiment, the exchange of signals 51 to S3 with the host side may be eliminated, and the switch Sv may be automatically controlled internally.
（発明の効果）
以上のように本発明によればＩＣカードリーダにおいて
接触端子のうち少くとも２つの端子間の導通状態を検出
し、予め設定された基準値と上記検出値とを比較する比
較手段を設け、その比較結果に基づいてＩＣカードが正
規に挿入されたか否かを判別可能としたので、異種物体
の挿入による電源のショートや火災の危険を未然に防止
することが可能となり、かつＩＣカードの異方向挿入も
検知可能となる。(Effects of the Invention) As described above, according to the present invention, the conduction state between at least two of the contact terminals is detected in the IC card reader, and the detected value is compared with a preset reference value. By providing a means and making it possible to determine whether or not the IC card has been properly inserted based on the comparison result, it is possible to prevent short circuits in the power supply and the risk of fire due to the insertion of foreign objects. It is also possible to detect insertion of an IC card in a different direction.
第１図は本発明の一実施例を示す回路図、第２図は同実
施例のＡ点電圧を示す図である。
Ｃ１，Ｃ２・・・・ＩＣカードの接点、Ｃ１ｌ、 Ｃ１
２・・・・接触端子、ＣＰ・・・・レベル比較器。FIG. 1 is a circuit diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing the voltage at point A of the same embodiment. C1, C2...IC card contacts, C1l, C1
2...Contact terminal, CP...Level comparator.
Claims (1)
・再生を行うようにしたＩＣカードリーダにおいて、上
記接触端子のうち少くとも２つの端子間の導通状態を検
出し、予め設定された基準値と上記検出値とを比較する
比較手段とを有し、該比較手段の比較結果に基づいてＩ
Ｃカードが正規に挿入されたか否かを判別可能としたこ
とを特徴とするＩＣカードリーダ。In an IC card reader that records and reproduces information by bringing contact terminals into contact with contacts of an IC card, the state of continuity between at least two of the contact terminals is detected, and a preset standard is determined. and a comparison means for comparing the detected value with the detected value, and based on the comparison result of the comparison means, the I
An IC card reader characterized in that it is possible to determine whether or not a C card has been properly inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60131320A JPS61289480A (en) | 1985-06-17 | 1985-06-17 | Ic card reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60131320A JPS61289480A (en) | 1985-06-17 | 1985-06-17 | Ic card reader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61289480A true JPS61289480A (en) | 1986-12-19 |
| JPH0544716B2 JPH0544716B2 (en) | 1993-07-07 |
Family
ID=15055193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60131320A Granted JPS61289480A (en) | 1985-06-17 | 1985-06-17 | Ic card reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61289480A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6271763U (en) * | 1985-10-18 | 1987-05-08 | ||
| EP0363871A2 (en) * | 1988-10-11 | 1990-04-18 | Oki Electric Industry Company, Limited | IC card reader/ writer having a short-circuit detection capability |
| WO1997023840A1 (en) * | 1995-12-22 | 1997-07-03 | Thomson Consumer Electronics, Inc. | Fault detection and modification circuit |
| US6164550A (en) * | 1995-12-22 | 2000-12-26 | Thomson Licensing S.A. | Fault detection and modification circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932084A (en) * | 1982-04-05 | 1984-02-21 | Dainippon Printing Co Ltd | Ic card reader and writer |
| JPS6175983A (en) * | 1984-09-21 | 1986-04-18 | Omron Tateisi Electronics Co | Input device of identification card |
-
1985
- 1985-06-17 JP JP60131320A patent/JPS61289480A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932084A (en) * | 1982-04-05 | 1984-02-21 | Dainippon Printing Co Ltd | Ic card reader and writer |
| JPS6175983A (en) * | 1984-09-21 | 1986-04-18 | Omron Tateisi Electronics Co | Input device of identification card |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6271763U (en) * | 1985-10-18 | 1987-05-08 | ||
| EP0363871A2 (en) * | 1988-10-11 | 1990-04-18 | Oki Electric Industry Company, Limited | IC card reader/ writer having a short-circuit detection capability |
| WO1997023840A1 (en) * | 1995-12-22 | 1997-07-03 | Thomson Consumer Electronics, Inc. | Fault detection and modification circuit |
| US6164550A (en) * | 1995-12-22 | 2000-12-26 | Thomson Licensing S.A. | Fault detection and modification circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0544716B2 (en) | 1993-07-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |