CN1179221A - Reading frame for smart card reader apparatus - Google Patents
Reading frame for smart card reader apparatus Download PDFInfo
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- CN1179221A CN1179221A CN 96192653 CN96192653A CN1179221A CN 1179221 A CN1179221 A CN 1179221A CN 96192653 CN96192653 CN 96192653 CN 96192653 A CN96192653 A CN 96192653A CN 1179221 A CN1179221 A CN 1179221A
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- Prior art keywords
- card
- contact
- brush
- framework
- microcircuit
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Abstract
A reading frame for an apparatus for reading smart cards (C), comprising a body supporting brush contact elements (BC1, BC2) for electrically contacting the conductive pads of a chip on a card (C) inserted into the frame. The frame comprises an electronic circuit connected to at least some of the brush contact elements and connectable to the electronic circuit of the card reader. The electronic circuit on the connector comprises means for controlling the insertion of the card (C) into the card reader and its withdrawal therefrom, and the reading frame comprises an additional brush contact (BCX) or cut-off sensing contact which is offset in relation to the primary brush contacts in the direction in which the card (C) is inserted, and electrically contacts one of the conductive pads (C1, C2) of the smart card (C) whether or not said card has a primary contact.
Description
The present invention relates to a kind ofly read framework (readingframe) for what the microcircuit card reader arrangement was used.
In the context of the present invention, " card " means all types of cards that a mixing or monolithic integrated optical circuit or " microchip " are housed.Will be at following use term " microcircuit ".For example, this card is the card of " credit card " form, also is called " memory card ".The microcircuit of card generally includes a microprocessor or microcontroller, and it comprises some memory circuits, such as " read-only (PROM) able to programme " type storer.Such card must be inserted and be used to read and/or the isolated plant of write data.For the sake of simplicity, below these devices are called " card reader ", should be appreciated that they equally can write data and guarantee all subsidiary functions (supply of electrical energy, test etc.) of hereinafter mentioned other.Data are stored in aforesaid all memory circuits, generally take the form of encrypting.Therefore, it is read or is written into all storage unit from all storage unit.
All other logical organizations have also been used, especially for " stored value card (electronic purse) " or similar application.
All have the input-output element that is made of several contact regions under any situation, these contact regions are also referred to as " liner (pads) ", surperficial concordant with one of all interareas (main face) of card.Various standards (ISO, AFNOR etc.) have defined the position of these contact areas.They not only are used for the input-output of aforementioned data, and according to related all application (having check etc.), also are used for supplying electric energy and carrying out various inspections to microcircuit.Card reader comprises a framework of reading that is equipped with several such brush contacts, when card is correctly inserted this and is read framework, and these brush contacts and aforementioned all zone formation electric contacts (galvanic contact).
Current various demands and the trend of having occurred comprises:
---improve the requirement of the security of card reader arrangement operation; For reaching this purpose, necessary:
1) guarantees that before microcircuit powered on and begins with the microcircuit dialogue program, card was correctly inserted.
2) guarantee the power supply that under the maloperation of card or the situation of " extracting ", opens circuit rapidly, damage all circuit and/or practise fraud avoiding.
For reaching this purpose, current read-out system comprises such device that is used for the correct insertion of test card, this device uses such stroke end (end of travel) contact, the initialization of the closure of this contact domination electronic circuit and by the electronic circuit control of card reader with by the beginning of the fetch-store execution ordering of a microprocessor monitors, to meet so special sequential, to this, this card reader:
---power on to microcircuit,
---activate all data I/O passages,
---activate microcircuit clock passage, and
---carry out the microcircuit initialize routine.
Microcircuit then must can be talked with so that make between the microprocessor of the microcircuit of card and card reader in response to initialize routine with a kind of particular form.In the ending of this dialogue, the deactivation program of microprocessor execute card.
Existing several special circuits based on microcontroller, they manage the program and the subsidiary superpotential and the short circuit that monitors on the card of the dialogue of these initialization and termination and microcircuit.
Yet if card is pulled out, the deactivation of outage and various passages is essential:
1) there is contact in the card that opens circuit;
2) before the card outage, can be by a logical operation program initialization by microprocessor or special-purpose microcontroller to this detection of opening circuit.
Card may be pulled out with the speed up to per second 1m.This require card exist contact have one less than the stroke of 0.1mm to guarantee the reaction time with the anxious deactivation program compatibility of chucking less than 100 μ s.
First problem is the precision that usually lacks the position of relevant all stroke ends contact, if especially all stroke ends contact be level or be installed in one and be independent of on the framework of reading framework.
The reaction time that second problem is microprocessor or microcontroller depends on its internal processes and is the clock frequency of its sequencing.
The applicant finds:
---the supposition card is correctly inserted when the stroke end contact is activated;
---by voltage being added to card power supply brush, initialize routine begins;
---with the initial phase that blocks, initialization (reset passages) brush is in the logical zero current potential before powering on;
---during initialize routine, all signal brushes are in so-called " high impedance " state.
Find based on these, the purpose of this invention is to provide a kind of device that is used for the contact area of test card with respect to the incorrect location of all brushes, it can be applied between all contact areas of all brushes of fast detecting and card contact lose.
For reaching this purpose, according to an important characteristic of the present invention, provide so additional brush contact on the framework reading of card, this contact is called circuit-opening contact, and is placed on respect to the position after inclined to one side a little with the total axle of the Nei Zhu of delegation brush contact element.
According to a second aspect of the invention, this contact is used for opening circuit of rapid detection card and is associated with the logical circuit of deactivation with one, and it is part or all of that this logical circuit is carried out some of following all functions:
---the initialization passage of microcircuit of card is arranged to 0,
---all signalling channels that will block are arranged to high impedance status,
---cut off the power supply of card.
Therefore, be contained in a kind of like this the present invention in the framework of reading for the device usefulness of reading microcircuit card, it comprises a matrix of supporting some brush contact elements, these brush contact elements are adjusted so that electrically contact when card is inserted into this framework with the relevant all conductive region formations of described microcircuit, it is characterized in that it comprises such electronic circuit, this electronic circuit links to each other with some of described all brush contact elements at least, and adjusted so that be connected with the electronic circuit of card reader, the entrained electronic circuit of contactor comprises and is used for controlling the insertion that snaps into card reader and blocks the device of recalling from card reader; And it is characterized in that this reads framework and comprise an additional detection brush contact that opens circuit, this contact is offset with respect to all original brush contacts on the direction of insertion of card, and is adjusted so that no matter microcircuit card is received original contact and whether all electrically contacted with one of all conductive regions of microcircuit card formation.
Thereby the framework of reading according to the present invention comprises: the mutually combining an of electronic circuit described in the PCT patented claim FR96/00156 that declared on January 30th, 1996 and an additional brush contact described in the EP-A-0 595 305.
In an advantageous embodiments, this is read framework and comprises original all brush contacts that several provide all signal brush contacts, a ground brush contact, a power supply brush contact.
In a preferred embodiment, this detecting device contact that opens circuit can electrically contact by a power supply conductive region and power supply brush contact formation.
By reading following explanation and referring to all accompanying drawings, the present invention will be better understood, and other all feature and advantage will be more clear, in the accompanying drawing:
---Fig. 1 is according to a skeleton view of reading framework of the present invention;
---Fig. 2 shows first example of microcircuit card according to the ISO standard, demonstrates the position of all contacts and their main geometrical property;
---Fig. 3 shows first example of the microcircuit card that meets the AFNOR standard, demonstrates the position of all contacts and their main geometrical property;
---Fig. 4 shows first example of microcircuit card according to the ISO standard, and its all contact has special structure;
---Fig. 5 a and 5b show an example of the prior art contactor that is used for the microcircuit card reader;
---Fig. 6 shows the layout of all contact elements of an example of the contactor that constitutes first embodiment of the invention;
---Fig. 7 a and 7b are detail drawing, describe one and are adjusted so that accept the operation of the contactor of card according to the ISO standard;
---Fig. 8 shows the special electronic circuit of the card reader relevant with contactor of the present invention;
---Fig. 9 shows a kind of embodiment of the logic electronics circuit that promptly opens circuit of the present invention;
---Figure 10 a and 10b show a kind of different embodiment of contactor of the present invention.
Among the embodiment of Fig. 1, the contactor 1 that is used to read the device of a card C that microcircuit 3 is housed has a matrix 2 of supporting several brush contact elements B, and these brush contact elements are made when card C is inserted into contactor 1 and described microcircuit I by design like this
CAll relevant conductive region constitute and electrically contact.
According to the present invention, contactor 1 comprises an electronic circuit I
C, this electronic circuit at least with described all brush contact element C
1To C
8In the electronic circuit 4 of some and card reader link to each other.The electronic circuit I that contactor 1 is entrained
CBe included in being used to monitor and block C insertion card reader and of describing in detail among the PCT application FR96/00156 with its device that takes out therefrom.
Fig. 2 shows a part that meets the card C of ISO7816 standard.Surperficial concordant all contact area C of this standard code and ID-1 type microcircuit card
1To C
8All sizes, position and distribution.This card can comprise one or more microcircuits.All input-output ends of these microcircuits are connected to contact area C
1To C
8
Contact area C
1To C
8Be arranged to two row, every row has four zones, is respectively C
1To C
4And C
5To C
8, this two row is parallel to each other in fact and be parallel to the left hand edge B of card C
c(among the figure).This edge plays the effect on composition surface.This figure also shows the top edge B of card release C
SFig. 2 is all contact C of demonstrative definition also
1-C
8All main geometric properties, all minimums or ultimate range (is unit with the millimeter) that they are represented as in the aforesaid standards to be stated.
As what before pointed out, there are 8 contacts.They can be positioned at front or the back of card C, but above-mentioned all distances are the left hand edge B with respect to card C
CWith top edge B
SDefine.
Being distributed in of all contacts invests in the table after this instructions and lists.
Fig. 3 uses the expression custom identical with card C to show the example of the microcircuit card C that meets old AFNOR standard.
About contact area C
1To C
8Between distance and former mentioned left hand edge and coboundary, have marked difference.In addition, the position of this contact area is also different.Such as, the contact C on the ISO card
8With the C on the AFNOR card
1Be in identical position.
Employed contactor must be considered employed standard in the card reader, and this constraint is common to all prior art contactors.
Fig. 5 a and 5b show a prior art contactor 60 by means of example, and they are respectively view and the vertical views that BB along the line gets the cross section.The all brush contacts 50 that are bent at 63 places are arranged to two row in corresponding hole 66 and 67.This contactor also comprises a pair of " stroke end " detecting device contact element 20-30, and they are bent at 60 and 61 places.Part 20 and 30 is arranged in the hole 68, and their curved end is arranged in the hole 68.
Must point out that for inserting a card (not shown) in the direction of arrow F, leading edge 70 (being arranged in the top of Fig. 4 b)---this edge is crooked---has two side points 71.These two points 71 are that this of fastening justice engages upper thread BB.The zone 24 that engages near the contact element 20 of upper thread BB has a hook-shaped profile.When card is fully inserted in the contactor 60, it pushes back contact element 20, and this insertion fully (" stroke end ") that makes two contact elements 20 and 30 constitute to contact and to block is detected by the suitable electronic circuit (not shown) of the card reader relevant with contactor 60.
This detect to allow with supply voltage impose on the brush relevant with the zone C 1 of blocking C (such as, referring to Fig. 2).
According to the present invention, add auxiliary " open circuit and detect a brush " type contact element with following version, in parallel with standard " voltage brush ".This exploring brush is offset with respect to the standard brush.
Fig. 6 is a schematic diagram, shows a contactor 1 that is used to insert card C of the present invention.Hypothesis will be inserted into the card C in the contactor 1 in example shown in Figure 6
ArdMeet aforesaid iso standard.
For simplifying this figure, Fig. 6 only shows all contact elements and they layout in the space.Other all parts: contactor matrix and other annex, can be common fully in all prior art contactors, for example contactor shown in Fig. 5 a and the 5b.
In a manner known way, contactor 1 has two row, and every row contains four brush contact elements, is respectively B
C1-B
C4And B
C5-B
C8Each of these brushes adjusted in case with the card C corresponding contact area C
1To C
8Constitute electric contact.They provide all contact elements 50 from Fig. 5 a.
A pair of " stroke end " contact element B also can be provided
Fc1And B
Fc2With test card C inserting fully and correctly to contactor 1.This itself also is known.
Fig. 6 shows brush B
C1-B
C4And B
C5-B
C8Be thin, soft metallic membrane, its all distal end 10 is a hook-type.These diaphragms are parallel to each other, and aforesaid all distal end perpendicular to the relative both sides of the axis of symmetry A of diaphragm each other in relative over the ground.
According to an essential characteristic of the present invention, an additional contact element B
CXBecome " open circuit and detect brush " type contact element B
C1Backup.In the manufacture process of contactor (referring to Fig. 5 b), this additional contact element B
CXCan by with same of all standard contacts on cut out, and enter the contactor matrix with their mold pressings simultaneously.Under this situation, it is favourable reducing the width of single diaphragm and increasing the 5th diaphragm by its avris.
Under all situations, additional contact element B
CXTest card C recalls, and correspondingly detects the activation and the deactivation of microcircuit card, and this point will be in following explanation.
Still under card C situation according to the ISO standard, Fig. 7 a shows brush contact element B
C1And B
CXWith respect to the zone C that is in normal operation position
1, promptly when the position of card C when correctly being inserted contactor 1.In this case, with brush contact element B
CXFrom brush contact element B
C1Withdrawal is provided with (with respect to the center of card), but in zone C
1On.Card C is by a composition surface b thrust.
Under the situation of this operate as normal, brush contact element B
C1Be switched on supply voltage V
CC, it is generally+5V.Zone C subsequently
1Be on the identical current potential additional contact B
CXThe supply voltage V of " reading " card
CC, and the logic that opens circuit of starting card initialization and read routine was lost efficacy, and enable power supply to the microcircuit of card.Read and/or write can normally be carried out.
If card is withdrawn, or for normally recalling or be " extracting ", zone C
1Quilt is along arrow F
RThe direction translation move and brush contact element B
CXBe that first will leave zone C
1The brush contact element.This situation is displayed among Fig. 6 b.
Should be added brush contact element B
CXThe voltage of " reading " is tending towards disappearing through a high level/low transition process, and this saltus step activates the logic electronics circuit that promptly opens circuit.
Yet, other all contact element B
C2To B
C8Have little time to leave and they corresponding zone C
2To C
8
Fig. 8 is a theory diagram that is used to read the device that has 6 contacts (prior art) that meets the ISO form.In this device, " stroke end " contact fc is connected to the control circuit CrC of card reader.The closure one of this contact is detected, and control circuit is promptly by brush contact B
C1Set up the supply voltage V of card
CCAnd the order initialization dialog procedure between starting card reader and the card, this is all corresponding brush contact via corresponding card, realizes by the input RST that resets that activates the clock CK, particularly deactivation card of the employed I/O circuit I/O foundation of dialogue card between card and the card reader.
Fig. 9 shows the logic electronics circuit that promptly opens circuit of such simplification, and it uses additional contact B
CXTo stop the dialogue between card reader and the card immediately.For reaching this purpose, from the joint V of this control circuit
CCSignal be connected to the set input " S " of a trigger Ba.The clock input CK of the trigger Ba that is activated by high level/low transition is connected to contact B
CXThe D input end of trigger Ba is in the logical zero level.What oppositely output Q was connected to such buffer circuit enables input end EN, the clock that blocks in this example, I/O and programming V
PPPassage is by this buffer circuit.The reverse output Q of trigger Ba combines with the RST output of door with control circuit by one, is connected to and area B
C2Initialization (resetting) brush of the card of contact.
The course of work of this device is as follows:
When card is inserted into, stroke end brush f
cClosure, and as in prior-art devices, the control circuit CrC of card reader makes card obtain supply voltage V to the detection of this closure
CCAccording to the present invention, this closure is subsequently by being arranged to trigger Ba a wait from additional contact B
CXThe state of downward saltus step of signal, urgent tripper is set.
When detecting stroke end contact f
cClosed the time, control circuit powers on to card, this causes the logical one level to appear at the set input " S " of trigger Ba.Trigger Ba subsequently, irrelevant with the state of clock input CK, be in the state of logical one level from inverse output terminal, change to a kind of state of waiting for clock signal C K negative edge.
Therefore, this tripper is set, but it keeps transparent to signal RST, CLK and I/O, and this remains a kind of these signals of approving because trigger Ba " Q " and " Q " export---under the situation of signal RST and under the situation of signal CLK and I/O via buffer circuit T---by with the state of door.
If card is pulled out brush B
CXLeave zone C
1And no longer read voltage V
CC, this causes high level/low transition one time at trigger Ba place, make output become its D input end read value " 0 ", trigger following incident:
---become " 0 " with the output of door, trigger microcircuit card C
ArdOnce " reset ",
---lost efficacy by making buffer circuit T, card reader is carried the brush of signal CLK and I/O by deactivation.
Therefore, all I/O passages of this logical unit protection card that promptly opens circuit detect a fault until control circuit, and voltage V cuts off the electricity supply
CCWith the normal deactivation that makes microcircuit card.
Certainly, this simplification device as described herein can be enhanced, the especially regulation of the overvoltage protection by the known all devices of skilled person, anti-rebounding device or the like, and, especially, can comprise one and be used to cut off V
CCAdditional flip-flop or an additional error detection circuit that links to each other with control circuit CrC.
Do not leave scope of the present invention, also might be at regional V
CCFront (with respect to the center of card) but still at regional V
CCOutside an additional brush contact is set, shown in Fig. 9 a and 9b.Then extracting of card causes powering brush contact B
C1Pass through zone C
1With additional brush contact B
CXContact, this produces a rising edge, and this rising edge only must promptly be obtained the operation of the detector means that is equal to by paraphase.
Naturally, effective for making the present invention, must satisfy some demand.When card is in bonding station and standard contact elements B
C1With additional contact element B
CXBetween exist when departing from, these demands relate generally to and satisfy contact element B in manufacturing tolerance and the contactor
C1With respect to zone C
1The tolerance of position.
For a concrete example, zone C are provided
1Be centered close to apart from the card b 18.87mm place, composition surface, tolerance is maximum+0.4mm minimum-0.5mm.As what mentioned, be parallel to F
RZone C on the direction
1Width be minimum 2mm, and C
1With one in abutting connection with C
1The zone between distance be 0.2mm.
When relating to precision, under the situation of the prior art contactor that provides some " stroke end " type contact element, the assurance of correct order is depended on:
---the mechanical precision of aforesaid all contact elements;
---all contact areas are with respect to the position at the edge of card;
---all brush contact elements are with respect to the position of all " stroke end " type contact element;
Under the situation according to contactor of the present invention, precision depends on only:
---the skew of desired all brush contact elements, this is by the instrument acquisition of a kind of cutting and crooked all brushes; And
---the precision of the width of all contact areas.
The resultnat accuracy that is obtained only is better than the precision that obtained under some " stroke end " type contact element is auxiliary.
Appendix
| Contact | Title and function |
| ????C 1 | VCC (supply voltage) |
| ????C 2 | RST (reset signal) |
| ????C 3 | CLK (clock signal) |
| ????C 4 | Give in the future and use |
| ????C 5 | GND () |
| ????C 6 | VPP (program voltage) |
| ????C 7 | I/O (I/O data) |
| ????C 8 | Give in the future and use |
Claims (6)
1. read framework (1) for the device usefulness of reading microcircuit card (C), it comprises a matrix of supporting some such brush contact elements (B), these brush contact elements are adjusted so that electrically contact when card (C) is inserted into this framework (1) with the relevant all conductive region formations of described microcircuit, it is characterized in that it comprises such electronic circuit (I
C), this electronic circuit links to each other with some of described all brush contact elements (B) at least, and is adjusted so that be connected the electronic circuit (I that contactor is entrained with the electronic circuit (4) of card reader
C) comprise and be used for the device that control card (C) is recalled from card reader to the insertion and the card (C) of card reader, and it is characterized in that this reads framework and comprise so additional opening circuit and detect brush contact (B
CX), this additional opening circuit is detected the direction of insertion (F of brush contact at card (C)
R) go up and to be offset with respect to original all brush contacts, and adjusted so as no matter microcircuit card receive original contact whether all with all conductive region (C of microcircuit card (C)
1To C
8) one of constitute and to electrically contact.
2. according to the framework of reading of claim 1, it is characterized in that constituting all signal brush contacts, a ground brush contact (B
C5), a power supply brush contact (B
C1) original all brush contact (B
C1To B
C5) adjusted so that respectively with all signal conductive regions of microcircuit card (C), a ground connection conductive region (C
5) and a power supply conductive region (C
1) the formation contact.
3. according to the framework of reading of claim 1 or 2, it is characterized in that the described detection contact (B that opens circuit
CX) adjusted so that by microcircuit card (C) corresponding to this original brush contact (B
C1) conductive region (C
1), with one of original all brush contacts (B
C1) constitute and to electrically contact.
4. according to the framework of reading of claim 3, it is characterized in that the described detection contact (B that opens circuit
CX) adjusted, so that microcircuit card (C) reads in the framework when being engaged by a composition surface (b) at this, by the described power supply conductive region (C of microcircuit card
1), with power supply brush contact (B
C1) constitute and to electrically contact.
5. according to the framework of reading of claim 3, it is characterized in that the described detection contact (B that opens circuit
CX) adjusted, so that microcircuit card (C) reads when not engaged by a composition surface (b) in the framework at this, by the described power supply conductive region (C of microcircuit card (C)
1), with power supply brush contact (B
C1) constitute and to electrically contact.
According in aforementioned all the claim any one read framework, it is characterized in that described opening circuit detect contact (B
CX) constitute one and be connected to a trigger pip that promptly opens circuit electronic installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96192653 CN1179221A (en) | 1995-03-22 | 1996-03-21 | Reading frame for smart card reader apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR95/03347 | 1995-03-22 | ||
| CN 96192653 CN1179221A (en) | 1995-03-22 | 1996-03-21 | Reading frame for smart card reader apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1179221A true CN1179221A (en) | 1998-04-15 |
Family
ID=5128392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96192653 Pending CN1179221A (en) | 1995-03-22 | 1996-03-21 | Reading frame for smart card reader apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1179221A (en) |
-
1996
- 1996-03-21 CN CN 96192653 patent/CN1179221A/en active Pending
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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