EP0698248A1 - Systeme de contact et lecteur pour cartes a puces - Google Patents

Systeme de contact et lecteur pour cartes a puces

Info

Publication number
EP0698248A1
EP0698248A1 EP94918328A EP94918328A EP0698248A1 EP 0698248 A1 EP0698248 A1 EP 0698248A1 EP 94918328 A EP94918328 A EP 94918328A EP 94918328 A EP94918328 A EP 94918328A EP 0698248 A1 EP0698248 A1 EP 0698248A1
Authority
EP
European Patent Office
Prior art keywords
circuit board
chip card
printed circuit
contact
reader
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.)
Withdrawn
Application number
EP94918328A
Other languages
German (de)
English (en)
Inventor
Manfred Reichardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amphenol Tuchel Electronics GmbH
Original Assignee
Amphenol Tuchel Electronics GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Amphenol Tuchel Electronics GmbH filed Critical Amphenol Tuchel Electronics GmbH
Publication of EP0698248A1 publication Critical patent/EP0698248A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
    • G06K7/0021—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers for reading/sensing record carriers having surface contacts

Definitions

  • the invention relates to a contacting system, in particular for cards containing a chip, eg. B. chip cards or SIM cards.
  • a chip eg. B. chip cards or SIM cards.
  • Chip card readers are referred to) are widely known and reference is only made to US Pat. No. 4,795,897, EP 0 234 654, FR 86 02 401.
  • the present invention aims, in particular, to provide a contacting system which is extraordinarily inexpensive and which is also suitable for realizing particularly flat assemblies, as are required in the mobile radio sector. Furthermore, the invention should make it possible to bridge larger spacing tolerances in sandwich constructions.
  • the present invention proposes a flexible printed circuit board for realizing the contact elements of a reader, e.g. B. to use a chip card reader. Since the flexible printed circuit board appears as a film as a whole, the resultant le- water can also be referred to as a "foil connector".
  • the cover foil of the circuit board is interrupted in the contact area.
  • the Cu conductor track is preferably deformed as a dome and coated with a suitable noble metal.
  • the contact force is applied by a preferably one-piece spring element. This force is only applied when the card is in the reading position.
  • the chip When using base foils coated with metal on both sides, the chip is shielded flat.
  • connection side As usual, contact can be made on the connection side. In SMT assemblies, only the foil connector has to be exposed to the soldering heat.
  • Poliflex foils can also be soldered directly.
  • the principle can also be used for readers with a transverse insert.
  • the flexible printed circuit board preferably has four contact fields, two each on the top and bottom of the card. This feature also claims only the contactless card. Furthermore, a minimal overall height can be realized.
  • Characteristic is particularly important if the contact unit is formed by two assemblies, the stood with greater tolerances.
  • FIG. 1 shows a schematic sectional or side view of part of a contacting system according to the invention in accordance with a first aspect of the invention
  • FIG. 2 shows a schematic top view of the contacting system according to FIG. 1;
  • FIGS. 1 and 2 shows a detail of the contact marking system of FIGS. 1 and 2;
  • FIG. 4 shows a schematic top view of a flexible printed circuit board for realizing a second aspect of the invention
  • FIG. 5 shows a schematic plan view of the folded circuit board of FIG. 4 for forming a universal chip card reader according to the second aspect
  • FIG. 6 shows a plan view similar to FIG. 4 of a flexible printed circuit board which is designed according to a third aspect of the invention
  • FIG. 7 is a side view of the two printed circuit board halves shown in FIG. are for the formation of a universal chip card reader;
  • FIGS. 6 and 7 shows the course of the conductor tracks in a flexible printed circuit board as used according to FIGS. 6 and 7;
  • FIG. 9 shows a longitudinal section through a chip card reader according to a fourth aspect of the invention, the cutting line running approximately along the longitudinal center line in FIG. 11;
  • FIG. 10 shows a section similar to FIG. 9, but in a card reading position
  • FIGS. 9 and 10 show a schematic top view of the chip card reader according to FIGS. 9 and 10;
  • FIGS. 9 to 20 shows a plan view of a spring element as used in a chip card reader according to FIGS. 9 to 20;
  • FIG. 13 shows a section through a carriage approximately along the longitudinal center line of FIG. 14;
  • FIG. 14 is a plan view of a carriage of the chip card reader shown in FIG. 9;
  • Fig. 15 is a section substantially along line A-B in Fig. 16;
  • FIG. 16 shows a plan view of a base part of the chip card reader according to FIG. 9;
  • FIG. 17 is a schematic side view of the flexprint shown in FIG. 18; 18 shows a plan view of the flexprint according to FIG. 17;
  • FIG. 20 shows a schematic sectional view of part of a base film of the flexprint according to FIG. 18;
  • Fig. 21 is a schematic longitudinal section through a
  • FIG. 22 is a sectional view similar to that in FIG. 21, but the chip card is shown here in its reading position;
  • FIG. 24 shows a schematic section transverse to the longitudinal axis of the chip card reader of FIG. 23;
  • Fig. 25 is a section along line C-D in Fig. 26;
  • FIG. 26 is a plan view of a pressure plate of the chip card reader of FIG. 21;
  • FIG. 27 shows a side view of the pressure plate according to FIG. 26;
  • Fig. 28 is a section along line A-B in Fig. 26;
  • Fig. 29 is a side view of a spring element of Fig. 30;
  • FIG. 30 is a top view of the spring element of FIG. 29;
  • Fig. 31 is a schematic sectional view taken along line C-D in Fig. 32;
  • FIG. 32 shows a plan view of the frame of the chip card reader of FIG. 21;
  • Fig. 33 is a schematic section along line A-B in
  • FIG. 34 shows a longitudinal section through a chip card reader with an integrated membrane keyboard according to a sixth aspect of the invention.
  • FIGS. 1 to 3 schematically show part of a contacting system 12 according to the invention, as can be used in a chip card reader 10, for example like the type shown in FIG. 5, for reading a chip card 11.
  • the chip card 11 is not shown in FIGS. 1 and 2, but it is shown in FIGS. 3 and 5.
  • the contacting system 12 has a flexible printed circuit board (also called flexprint) 14, which can be resiliently loaded by a preferably one-piece spring element 16.
  • the spring element 16 is preferably a spring plate which has the shape shown in FIGS. 1 and 2.
  • the spring element 16 forms spring arms 17 and spring tips 18.
  • the spring tips 18 work together with flexible printed circuit board 14 in the manner shown in particular in FIG. 3.
  • the spring tips 18 thus press the conductor tape tip 20 in the direction of the chip card 11 and, when the chip card is inserted in the reading position, onto the card contacts 100 (FIG. 3) of the chip card 11.
  • the flexible printed circuit board 14 preferably consists of three layers or foils, namely a base foil 23, a copper foil 24 and a cover foil 25.
  • the cover foil 25 is therefore where the conductor strip dome 20 is to be formed with a
  • FIG. 4 shows an embodiment of a flexible printed circuit board 14 according to a second aspect of the invention, the arrangement here being such that a plurality of contact fields 31, 32, 33 and 34 are formed, each having contact areas which range from 1 to 8 are numbered. These contact areas 1 to 8 can be deformed by one or more spring elements 16 to form the contact tips 20 shown in FIG. 3.
  • the arrangement of the contact areas 1 to 8 of each of the contact fields 31-34 corresponds to the arrangement of the card contacts 100 on the chip card 11.
  • folding takes place along the fold line 41 ⁇ deretti 16 was omitted here.
  • the arrangement of the contact fields 31-34 on the flexible printed circuit board 14 is provided such that the chip card 11 (as shown in FIG. 5) can be inserted into the chip card reader 10 in practically any position from the right in FIG. 5 and always finds the necessary contact connections. It can be said that each of the contact fields 1 to 8 and the associated conductor track of the flexprint 14 form a contact element of the chip card reader 10.
  • the lines 40 in FIG. 4 indicate that the flexible printed circuit board 14 can consist of several continuous pieces, which are then cut, for example. be. With 41 • a fold line 41 is designated after the construction shown in FIG. 5 is realized. Connections in the form of conductor tracks 50, 51, 52 etc. are provided in a flexible manner in the flexible printed circuit board 14, which connect the contact areas 1 to 8 of the various contact fields 31-34 in a corresponding manner and also in a corresponding manner the ( Provide (not shown) lead out of the reader 10.
  • the spring force is therefore preferably applied by a one-piece, metallic spring element 16.
  • This spring element 16 is relatively flat, so it is a kind of leaf spring, which allows the construction of very flat chip card readers. Furthermore, this construction allows the chip card reader to be produced very inexpensively, in particular four spatially different contact arrangements can be provided which allow the card to be inserted in any direction.
  • it is preferably possible to coat the flexprint or the flexible printed circuit board on both sides and thus to shield the chip over the entire surface.
  • a third aspect of the invention is shown, and it can be seen here that, in contrast to the illustration according to FIGS. 4 and 5, a flexible printed circuit board (flex print) 14 is not folded lengthways, so to speak, but is folded over .
  • the flexible printed circuit board 14 according to FIG. 6 has contact fields 45 to 48 corresponding to the contact fields 31 to 34 according to FIG. 4.
  • Each of the contact fields 45 to 48 preferably has eight contact areas 1 to 8, similar to that shown in FIGS. 1 to 4. 8 shows these contact areas 1 to 8.
  • the contact areas 1 to 8 of the different contact fields 45 to 48 are connected in a suitable manner, for example shown in FIG. 8, by conductor tracks 50 formed in the flex print. Accordingly according to outgoing connections are designated 53 and 54.
  • the evaluation electronics for the information contained in the chip card 11 are connected to the connections 53 and 54.
  • FIG. 7 illustrates how a chip card reader 43 arises from the flexible printed circuit board 14 by folding along the fold line 44 and along the curve 49, which, in particular for a chip card to be used transversely, makes it possible to contact the card contacts 100 of the chip card 11 regardless of their position.
  • a spring element 16 according to FIGS. 1 and 2 is likewise provided in order to obtain contact elements which function properly.
  • Each of the contact elements of the chip card reader 10 as well as of the chip card reader 43 is practically formed by a conductor track and one of the contact areas 1 to 8, which in turn ver preferably a spring element 16 in the manner shown in FIG. 3 by spring means ⁇ is shaped so as to form a contact tip 20.
  • FIG. 9 to 20 show a fourth embodiment or a fourth aspect of the invention, namely the use of a flexible printed circuit board (flex print) 59 in a card reader 56 with a movable carriage 58.
  • spring means 95 are used, which are direct or indirect act on the circuit board 59.
  • FIG. 9 to 20 show the chip card reader 56 consisting of a base part 57 with a slide 58 which can be lowered and slidably arranged therein.
  • guide means 60 (FIG. 15) and guide means are provided on the base part 57.
  • tel 75 (Fig. 14) provided on the carriage 58.
  • These guide means 60 and 75 are preferably in positive engagement with one another and ensure the movement of the carriage 58 from the insertion position shown in FIG. 9 into the chip card reading position shown in FIG. 10.
  • the guide means 60 provided on the base part 57 preferably have the shape of - see FIG. 16 - oppositely arranged recesses which engage with pins 76 to 79 on the slide 58.
  • the base part 57 has a bottom wall 63, in which a slot 64 is formed approximately in the center but laterally offset, which serves to receive an arm 80 of the carriage 58.
  • the bottom wall 63 forms a card brake 65 in the form of a resilient arm which is intended to hold the chip card inserted in the reading position there at least during the reading process.
  • An anchor 66 is also formed on the bottom wall 63.
  • a rear wall 67 is formed, which can be used, for example, as a stop for the chip card in its reading position.
  • the carriage 58 has a frame 70 - compare in particular FIG. 14 - with a first longitudinal side part 71, a second longitudinal side part 72, a first transverse side part 73 and a second transverse side part 74.
  • the pins 76 which form the guide means 75 of the carriage to 79 and the arm 80, which preferably projects downward from the slide 58, have already been mentioned.
  • Arm 80 is used to connect to a spring 96 which is attached at its other end to the anchor 66. The spring 96 biases the carriage 58 into the card insertion position shown in FIG. 9. When the carriage 58 moves from the position shown in FIG. 9 into the reading position shown in FIG.
  • the spring 96 is tensioned and thus has the The tendency to return the carriage 58 to the insertion position shown in FIG. 9.
  • the friction force of the brake 95 will prevent this until the card 11 is pulled out of a guide slot 61 in the base part 7 again.
  • an opening 91 in the slide 58 is spanned by webs 81 to 84 which are preferably formed in one piece from plastic together with the frame 30.
  • Each of the webs 81 to 84 preferably has an elevation 85 in the center, which are used for cooperation with spring means 95 to be described in more detail.
  • tabs 86 and 87 extending opposite the respective elevations 85 are preferably arranged symmetrically with respect to the respective elevation 85.
  • the lugs 86 and 87 serve to contact the printed circuit board 59 in order to form the contact tips 20 already mentioned.
  • a recess 88 is provided in the carriage 58, which forms spring holding means.
  • the carriage 58 which forms spring holding means.
  • the slide 58 also preferably forms, together with this, injection-molded fastening means 92 for the flexible printed circuit board 14 or the flex print.
  • These fastening means 92 have in particular two pins 93 projecting upwards in FIG. 14 and two arms 94 which, together with the surface of the carriage 58, form a receiving slot for the flexible printed circuit board 59.
  • fastening means 97 are also provided on the carriage 58 and are used to hang an opening 100 in the flexible printed circuit board 59. Pins 93 'and 94' serve to receive openings 113 in the printed circuit board 59.
  • the spring means 95 are preferably designed in the form of a leaf spring 99 which has four webs 101, 102, 103 and 104 which cooperate with the corresponding webs 84, 83, 82 and 81.
  • Cross bars 105 connect the bars 101 to 104 on the transverse sides.
  • the leaf spring 99 is preferably flat overall.
  • the leaf spring 99 is inserted into the recess 88, preferably in such a way that a force is exerted on the elevations 85 so that the lugs 86, 87 are pressed downward from the rest position shown in FIG. 13 and then in turn to press against the flexible printed circuit board 59, preferably where the contact areas 1 to 8 are located.
  • the flexible printed circuit board 59 has a plurality of conductor tracks
  • contact points 120 of preferably circular cross section are preferably formed to form contacts which are to come into engagement with a chip card, which will be explained in more detail below.
  • the conductor tracks 111 end in connections 115, to which an evaluation circuit can be connected.
  • the printed circuit board 59 preferably consists of a cover film 122 and a base film
  • the cover film 122 in turn consists of a polyimide layer 123, an adhesive layer 124 and a protective film 125.
  • the base film 126 consists of a copper layer 127, an adhesive layer 128 and a polyimide layer 129.
  • the structure of this printed circuit board 59 differs also in terms of terminology, somewhat of the printed circuit board 14 shown above in FIG. 3.
  • the cover film 122 is not present in the area of the contact points 120, so that the copper layer 127 is immediately apparent. This is also shown schematically in the cutout of FIG. 17, where an interruption of the cover foil 122 can be seen and where the copper layer 127 is indicated schematically by the dash-dotted line.
  • the copper layer 127 can preferably be made thicker in the area of the contact points 120 and it is also possible, particularly in this area, to provide a gold or silver layer.
  • the flexible printed circuit board 59 is preferably deformed in the manner shown in FIG. 17, for example by embossing, in such a way that a contact tip 20 is formed, without having to rely on the force, for example, of the spring element 133 around the contact tip 20 to form.
  • the spring element for example the spring element 133, then still has the task of the already preformed contact tip 20, to give the necessary elasticity in order to achieve a reliable contact with the card contacts or chip card.
  • the fastening of the flexible printed circuit board 59 to the slide 58 results for the person skilled in the art from the above description.
  • the end of the flexible printed circuit board 59 shown on the left in FIG. 18 is, as it were, hooked into the arm 80 on the underside of the slide 58 by means of the opening 100 and the openings 113 of the printed circuit board 59 sit around the pins 93 ', 94'. Then, the circuit board 59 extends over the tabs 86 and 87 and is wrapped around the end of the carriage 58 located on the right in FIG.
  • the printed circuit board 59 runs away to the evaluation device to be connected to the chip card reader. Circuit. Because the printed circuit board 59 runs tightly around the underside of the carriage 56, and because the webs 81 to 84 are tensioned by the spring means 95, the lugs 86, 87 press against the contact couplers 20 from the inside, so that they are in the reading position 10 resiliently sit on the corresponding card contacts.
  • 21 to 33 show a fifth aspect or a fifth exemplary embodiment of the invention, according to which a chip card reader 130 is provided, which has static frame or housing means 140 and contact pressing means 141, which are preferably movable perpendicular to chip card 11. According to a preferred embodiment of the invention, spring means 142 are provided, which cooperate in particular with a flexible printed circuit board 14.
  • the frames or housing means 140 preferably have a frame 131 and a cover 134.
  • the lid 134 is attached to the frame 131.
  • the spring means 142 are preferably designed in the form of a spring element 133 (FIGS. 29, 30), which is preferably in one piece and preferably made of metal.
  • the spring element 133 has a spring frame 164, from which spring arms 166, 167 protrude like a comb and point toward one another.
  • the spring arms 166, 167 are preferably equipped with domes 169, as shown in FIG. 29, which are provided for contact with a flex print 14.
  • the spring frame 64 also forms, on its two opposite sides, a generally U-shaped dome-shaped channel 168 or else individual dome.
  • the frame 131 shown in detail in FIGS. 31 to 33 forms two opposite guide walls 135 for the side edges of the chip card and a guide surface 136 (FIG. 24) on the top of the frame, so to speak 131. Furthermore, two spaced webs 138 and 139 are preferably provided in one piece with the frame 131, which serve to hold a flexible printed circuit board 59 or 14 and in particular to clamp it.
  • the pressure plate 132 is shown in detail in FIGS. 25 to 28. It has at its left end in FIG. 26 (two) stops 150, 151, which preferably protrude upwards in FIG. 26 and cooperate with the front edge thereof when a chip card is inserted, in order to shift the pressure plate 132 out of the 21 in the position shown in FIG. 22. It can be seen that during this displacement the pressure plate 32 presses up part of the spring element 133 perpendicular to the card in FIGS. 21, 22 and thereby causes the contact points 120 of the contact elements of the chip card reader 130 to have the card contacts present on the chip card 11 20.
  • the contact elements of the chip card reader 130 are preferably formed by the flexible printed circuit board 14, which for this purpose has conductor tracks 111 and contact tips 20, similar to that shown in FIGS. 17 and 18. These contact tips 20 are pressed with their contact points 120 against the card contacts 20 during the transition from the position according to FIG. 21 to the position according to FIG. 22.
  • the contact elements of the chip card reader 130 are implemented here by a flexible printed circuit board 14, it is also possible according to the invention to provide a movement for the contact elements which is essentially perpendicular to the surface of the chip card carrying the card contacts, if the contacting of the chip card contacts is to be carried out.
  • the pressure plate 132 is equipped on its two long sides with guide strips 152, which in a guide 153 shown in Fig. 33 can be used in the frame 131.
  • the pressure plate 132 On the upper side or support surface 55 for the spring element 133, the pressure plate 132 has lifting means 162 which in any case partially raise the spring element 133 when the pressure plate 132 is displaced.
  • the spring arms 166 and 167 press with their tips 169 against the flexible printed circuit board 14 in the area of the contact areas 1 to 8, so that they come into safe contact with the card contacts of the chip card 11 .
  • the lifting means 162 are preferably formed by a recess 157 and an opposite recess 160 in the pressure plate 132.
  • Inclined surfaces 158 and 159 enable a safe upward movement and guidance of the grooves or crests 168 so that they are on the top, ie. H. the bearing surfaces 155 and 156 of the pressure plate 132.
  • the printed circuit board is equipped with opposite connections (cf. FIG. 21) 172, 173.
  • FIG. 34 shows a sixth exemplary embodiment of the invention, specifically a chip card reader 180 which uses a flexible printed circuit board or flex print 182 together with a keyboard 181.
  • An insertion slot 191 for a chip card is formed in a housing 190.
  • a spring element 193 is held in a chamber 196 of the housing 190 and has arms 194 which are in contact with the flex print 82 in the manner described above in order to form contact elements with contact tips 20.
  • the flex print 182 is parallel to the chamber 196 around a flex print part 183 and in particular one for this purpose, the flex print part 184 is extended in order to finally end in a flex print part 185, which is designed such that the keyboard 181 is formed as a membrane keyboard.
  • the keyboard 181 has keys 186, so that there is a total of a keyboard integrated with the chip card reader 180.

Landscapes

  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

Dans un système de contact pour cartes à puces (11), on utilise une plaquette flexible de circuits imprimés (14, 59) comme élément de contact.
EP94918328A 1993-05-14 1994-05-16 Systeme de contact et lecteur pour cartes a puces Withdrawn EP0698248A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4316304 1993-05-14
DE4316304 1993-05-14
PCT/EP1994/001579 WO1994027243A1 (fr) 1993-05-14 1994-05-16 Systeme de contact et lecteur pour cartes a puces

Publications (1)

Publication Number Publication Date
EP0698248A1 true EP0698248A1 (fr) 1996-02-28

Family

ID=6488180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94918328A Withdrawn EP0698248A1 (fr) 1993-05-14 1994-05-16 Systeme de contact et lecteur pour cartes a puces

Country Status (5)

Country Link
US (1) US5726432A (fr)
EP (1) EP0698248A1 (fr)
JP (1) JPH08511114A (fr)
DE (1) DE4417088C2 (fr)
WO (1) WO1994027243A1 (fr)

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Also Published As

Publication number Publication date
US5726432A (en) 1998-03-10
DE4417088C2 (de) 2001-11-29
WO1994027243A1 (fr) 1994-11-24
DE4417088A1 (de) 1995-01-05
JPH08511114A (ja) 1996-11-19

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