EP0572847A1 - Coin sensor - Google Patents

Coin sensor Download PDF

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Publication number
EP0572847A1
EP0572847A1 EP93107938A EP93107938A EP0572847A1 EP 0572847 A1 EP0572847 A1 EP 0572847A1 EP 93107938 A EP93107938 A EP 93107938A EP 93107938 A EP93107938 A EP 93107938A EP 0572847 A1 EP0572847 A1 EP 0572847A1
Authority
EP
European Patent Office
Prior art keywords
coin
coil
circuit
oscillator
conductor
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
Application number
EP93107938A
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German (de)
French (fr)
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EP0572847B1 (en
Inventor
Thomas Seitz
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.)
IP-TPG HOLDCO Sarl
Electrowatt Technology Innovation AG
Original Assignee
Landis and Gyr Technology Innovation AG
Landis and Gyr Bussiness Support AG
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Filing date
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Publication of EP0572847A1 publication Critical patent/EP0572847A1/en
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Publication of EP0572847B1 publication Critical patent/EP0572847B1/en
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/08—Testing the magnetic or electric properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to an inductive coin detector and a method for its production of the type mentioned in the preamble of claim 1.
  • Such inductive coin detectors are suitable, for example, for the identification of coins in coin validators.
  • An inductive coin detector of the type mentioned in the preamble of claim 1 is known from GB-A 2'151'062.
  • the coin detector consists of a flat coil in the circuit of a high-frequency oscillator.
  • An alternating magnetic field emerging from the coil perpendicularly penetrates a coin channel.
  • a coin rolling through the alternating field in the coin channel changes the resonance frequency of the oscillator through the interaction of the coin with the alternating field.
  • the frequency deviation caused by the presence of the coin serves as a measure of the parameter to be measured, such as. B. diameter, alloy, presence in general etc.
  • the coil is wound from wire or made on a printed circuit board by etching a lamination of copper.
  • the rest of the high-frequency oscillator, which is situated further away, is connected to the coil via shielded feeder cables.
  • the invention has for its object to provide a low-interference, inexpensive inductive coin detector that is easy to install and can be arranged in the coin validator.
  • 1 means a coin channel in a coin validator, 2 a coin, 3 a coil, 4 a detector circuit, 5 a feed device and 6 an evaluation unit.
  • the supply device 6 is used for energy supply and is connected to the detector circuit 4 via supply lines 7 and to the evaluation unit 6 via supply lines 8.
  • a signal line 9 extends from the detector circuit 4 to the evaluation unit 6 for transmitting measurement signals.
  • the evaluation unit 6 analyzes the measurement signals in a predetermined manner and can release a service via a command line 10.
  • the coin validator is e.g. B. in a public telephone or in a vending machine installed and enables the service to be triggered by means of coins 2.
  • the coin validator comprises at least one inductive coin detector, which is formed from the coil 3 and the detector circuit 4 and as a scanning element on the coin channel 1 for measuring a predetermined size of the coin 2, such as the diameter of the coin 2, the type of coin alloy, etc., or for checking the presence of the Coin 2 in coin channel 1 is used.
  • the coil 3 has at least one flat spiral conductor arrangement 11, so that the coil 3 can be arranged on the coin channel 1 in a space-saving manner.
  • An alternating current in the conductor arrangement 11 of the coil 3 generates an alternating magnetic field which, in the direction of the coil axis 12 (FIG. 2), penetrates the coin channel 1 perpendicular to a running direction 13 of the coin 2, for example in such a way that the coil axis 12 is also parallel to the axis of the coin coin 2 moving past the coil 3 is aligned.
  • the coil 3 (FIG. 1) has two flat spiral conductor arrangements 11 and 11 ′ which are coaxially aligned on both sides on an insulating film 14 and which can be electrically connected to one another by means of a through-connection 16 through the center 15 of the coil 3.
  • the coil axis 12 shown in dashed lines is perpendicular to the plane of the conductor arrangement 11 or 11 'and penetrates the center 15.
  • the conductor arrangement 11 or 11' winds from the center 15 around the coil axis 12 to the periphery of the conductor arrangement 11 or 11 ' and ends in a coil connection 17 and 18, respectively.
  • Any electrical conductor material can be used for the conductor arrangement 11, 11 ', but copper is particularly inexpensive.
  • the two conductor arrangements 11 and 11 ' can be connected to a through connection 16 to form a flat two-layer coil 3, the windings of which consist of the conductor arrangements 11 and 11'.
  • both conductor arrangements 11 and 11 ' have the same winding sense on.
  • the detector circuit 4 is arranged on the insulating film 14 outside the conductor arrangement 11.
  • the coil connections 17, 18 of the two-layer coil 3 are connected to the detector circuit 4 via two short bridges 19, 19 ', one bridge 19' leading through the insulating film 14 to the other side to the coil connection 18.
  • the detector circuit 4 has connection surfaces for contacting, which are connected via connections 20 to the connection lugs 21 for the feed lines 7 (FIG. 1) and the signal line 9 (FIG. 1).
  • the coil 3 can also be made in one layer.
  • the insulating film 14 can only carry the conductor arrangement 11 on one side or only the one conductor arrangement 11 or 11 ′ is connected, the through-connection 16 being missing.
  • the bridges 19, 19 ′ end on the coil side in the center 15 and on the coil connection 17 or 18.
  • the coin detector is advantageously housed in a flat housing 22.
  • a stable, flat housing 22 can be produced inexpensively.
  • the two flat sides 23, 23 'of the housing 22 are penetrated perpendicularly by the coil axis 12.
  • the connection lugs 21 establish the connection to the feed lines 7 (FIG. 1) and the signal line 9 (FIG. 1) through the material of the housing 22. It is also possible to lead the supply lines 7 and the signal line 9 directly to the outside instead of the connection fields 21 as wire ends for direct connection to the supply device 5 (FIG. 1) and the evaluation unit 6 (FIG. 1), since there are already three wires for the necessary ones Lines 7, 9 between the coin detector and the power supply 5 and the evaluation unit 6 are sufficient.
  • the detector circuit 4 is glued to a substrate 24 made of conductor material and, as shown in FIG. 3, comprises an oscillator circuit 25 and a measuring circuit 26.
  • the oscillator circuit 25 in connection with the coil 3 (FIG. 1) forms an LC oscillator with the Coil 3 as an inductor. Examples of such LC oscillators are described in the book "Semiconductor Circuit Technology" by U. Tietze and Ch. Schenk, Springer-Verlag Berlin, 1978, ISBN 3-540-08628-5, pages 419 to 430, 4th edition.
  • the alternating current generated by the oscillator circuit 25 in the coil 3 effects the alternating magnetic field of the coin detector in the coin channel 1 (FIG. 1). Without a coin 2 (FIG.
  • the LC oscillator in the alternating magnetic field, the LC oscillator oscillates at a predetermined idle frequency f0. As soon as the material of the coin 2 draws energy from the alternating field, the frequency f of the LC oscillator changes.
  • the LC oscillator of the coin detector begins to oscillate, the inductance of the coil 3 and a capacitor of the oscillator circuit 25 connected in parallel with the coil 3 determining the frequency f0. Since the coil 3 and the capacitor in the oscillator circuit 25 can be manufactured with very tight tolerances, the idle frequency f stre scatters in a narrow band, so that tuning of the LC oscillator to the predetermined idle frequency 0 is unnecessary.
  • the coil 3 has an inductance of between 0.5 ⁇ H and 50 ⁇ H.
  • the two-layer coil 3 with a predetermined diameter of 14 mm of both conductor arrangements 11, 11 ' has an inductance of 2920 nH with a total of 20 turns.
  • the single-layer coil 3 has one conductor arrangement 11 of the same diameter and 10 turns only a quarter of the inductance, ie 730 nH.
  • the coils 3 have a quality factor Q in the range from 5 to 10.
  • the coin detector has the advantage that, because of the short bridges 19, 19 'between the oscillator circuit 25 and the coil 3, the LC oscillator can be constructed with little interference and because of the automatable manufacture, it can also be inexpensively constructed. In spite of the high frequencies f of the LC oscillator, the feed lines 7 and the signal line 9 do not emit any interfering electromagnetic waves which would impair the function of the coin validator and would further burden the LC oscillator.
  • the compact coin detector is easy to place in the coin validator on coin channel 1 and is characterized by low power consumption.
  • the coin detector can also be used generally as a sensor which detects an approach of a piece of metal with the alternating field of the coil 3.
  • the oscillator circuit 25 and the measuring circuit 26 can be implemented on a Si wafer chip in CMOS technology. This measure lowers the current consumption of the detector circuit 4 to less than 30 ⁇ A at a supply voltage of 5 V when the LCO oscillator with the single-layer coil 3 oscillates at the idle frequency f0 of approximately 16 MHz.
  • the insulating film 14 has the conductor arrangement 11 or 11 ′, the connecting tabs 21 and the substrate 24 on at least one side.
  • These conductor pieces 11, 17, 21 and 24 or 11, 11 ', 17, 18, 21 and 24 made of an electrical conductor material can be applied to the insulating film 14 on one or both sides in a printing process or by vapor deposition or deposition.
  • the step-by-step manufacture of the coin detectors is described below by way of example, the conductor pieces 11, 17, 21 and 24 or 11, 11 ', 17, 18, 21 and 24 are etched out of the conductor material laminated onto the insulating film 14 on one or both sides.
  • the electrical conductor material has a thickness of 0.01 mm to 0.15 mm or more. The thicker conductor material brings about an advantageous rigidity of the connecting lugs 21.
  • a tape 27 of a commercially available KAPTON (R) film 70 ⁇ m thick with a one- or both-sided layer of 17 ⁇ m copper can be used as the flexible insulating film 14.
  • the coil 3 is produced as part of the “lead frame” together with the substrate 24 and the connecting tabs 21 from the band 27.
  • the advantage of this method is its suitability for the automated manufacture of the coin detector, since all connections 16, 19, 19 ', 20 on the carrier sheet 30 can be carried out inexpensively by bonding thin wires if the detector circuit 4 is integrated on a semiconductor chip and the frequency-determining capacitor the oscillator circuit 25 is arranged as a separate component 25 'on the substrate 24 and is connected directly to the coil connections 17, 18.
  • the coin detector can be adjusted between method steps f) and g), the value of the idle frequency f0 measured at the LC oscillator being stored in the measuring circuit 26 for the calculation of the frequency deviation ⁇ f.
  • the manufacturing process can be for two-layer coils 3 are modified so that the conductor arrangements 11 are first produced on the belt 27 laminated on one side after the production steps a) to d). Subsequently, the conductor-free sides of two identical strips 27 treated in this way are aligned with the positioning holes 29, 29 'and joined to form a composite strip, the conductor arrangements 11 on both sides of the composite strip also being arranged coaxially and in the same winding direction.
  • the composite strip is processed in the following manufacturing steps e) to h) like a double-sided tape 27.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
  • Pinball Game Machines (AREA)
  • Noodles (AREA)
  • Eye Examination Apparatus (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

An inductive coin detector for detecting the presence of coins (2) in a coin channel (1) by means of a high-frequency alternating magnetic field exhibits a flat coil (3) arranged outside the coin channel (1). A high-frequency alternating magnetic field generated by the coil (3) penetrates perpendicularly to the running direction of the coin (13) through the coin channel (1). The coil (3) is formed from at least one flat spiral conductor arrangement and is a part of the LC oscillator. Together with a measuring circuit, the oscillator circuit forms a detector circuit (4) for detecting a change in the oscillator frequency caused by the presence of the coin (2). The coil (3) and the detector circuit (4) are arranged in the immediate vicinity on a common carrier and can be enclosed in a flat housing. The coin detector can be connected via a three-wire line which comprises a feed line (7) and a signal line (9). <IMAGE>

Description

Die Erfindung bezieht sich auf einen induktiven Münzdetektor und ein Verfahren zu dessen Herstellung der im Oberbegriff des Anspruchs 1 genannten Art.The invention relates to an inductive coin detector and a method for its production of the type mentioned in the preamble of claim 1.

Solche induktive Münzdetektoren eignen sich beispielsweise für die Identifizierung von Münzen bei Münzprüfern.Such inductive coin detectors are suitable, for example, for the identification of coins in coin validators.

Ein induktiver Münzdetektor der im Oberbegriff des Anspruchs 1 genannten Art ist aus der GB-A 2'151'062 bekannt. Der Münzdetektor besteht aus einer flachen Spule im Schaltkreis eines Hochfrequenz-Oszillators. Ein aus der Spule tretendes magnetisches Wechselfeld durchdringt senkrecht einen Münzkanal. Eine im Münzkanal durch das Wechselfeld rollende Münze verändert die Resonanzfrequenz des Oszillators durch Wechselwirkung der Münze mit dem Wechselfeld. Die durch die Anwesenheit der Münze hervorgerufene Frequenzabweichung dient als Mass für den zu messenden Parameter, wie z. B. Durchmesser, Legierung, Anwesenheit generell etc. Die Spule ist aus Draht gewickelt oder auf einer Leiterplatte durch Aetzen einer Kaschierung aus Kupfer hergestellt. Der übrige, weiter entfernt aufgestellte Teil des Hochfrequenz-Oszillators ist über störsignalsicher abgeschirmte Zuleitungen mit der Spule verbunden.An inductive coin detector of the type mentioned in the preamble of claim 1 is known from GB-A 2'151'062. The coin detector consists of a flat coil in the circuit of a high-frequency oscillator. An alternating magnetic field emerging from the coil perpendicularly penetrates a coin channel. A coin rolling through the alternating field in the coin channel changes the resonance frequency of the oscillator through the interaction of the coin with the alternating field. The frequency deviation caused by the presence of the coin serves as a measure of the parameter to be measured, such as. B. diameter, alloy, presence in general etc. The coil is wound from wire or made on a printed circuit board by etching a lamination of copper. The rest of the high-frequency oscillator, which is situated further away, is connected to the coil via shielded feeder cables.

Aus der US-PS 4'494'100 sind Flachspulen bekannt, bei denen ein elektrisches Leitermaterial als einlagige Spirale auf einem flachen Körper aus Isoliermaterial aufgebracht ist und die in verschiedenen Technologien herstellbar sind. Die Spule ist an der Berandung des Isoliermaterials und im Zentrum der Spirale kontaktiert.From US Pat. No. 4,494,100, flat coils are known in which an electrical conductor material is applied as a single-layer spiral to a flat body made of insulating material and which can be produced in various technologies. The coil is contacted at the edge of the insulating material and in the center of the spiral.

Ausserdem ist aus der Herstellung integrierter Schaltungen (IC) bekannt, Mikrochips mit der integrierten Schaltung auf Träger zu montieren, die zusammen mit Anschlussbeinen aus einem Blechstreifen gestanzt sind. Nach dem Ausstanzen weist der Blechstreifen eine regelmässige Folge von sogenannten "lead frames" mit je einem Träger und der vorbestimmten Anzahl der Anschlussbeine auf. Die "lead frames" bleiben beidseitig über durchgehende Randstreifen mit Positionierlöchern verbunden. Dieser "lead frames"-Blechstreifen ermöglicht kostengünstige Verfahren beim Bestücken der Träger mit den Mikrochips, dem Bonden von Verbindungen zwischen Anschlüssen der integrierten Schaltung und den entsprechenden, regelmässig angeordneten Anschlussbeinen sowie dem Verpressen der Schaltung mit Kunststoff zu einem IC. Anschliessend wird der fertig gestellte IC aus dem "lead frame" freigestanzt.In addition, it is known from the manufacture of integrated circuits (IC) to mount microchips with the integrated circuit on carriers which are stamped from a sheet metal strip together with connecting legs. After punching out, the sheet metal strip has a regular sequence of so-called "lead frames", each with a carrier and the predetermined number of connecting legs on. The "lead frames" remain connected to positioning holes on both sides by continuous edge strips. This "lead frames" sheet metal strip enables cost-effective methods when equipping the carriers with the microchips, the bonding of connections between connections of the integrated circuit and the corresponding, regularly arranged connection legs, and the pressing of the circuit with plastic to form an IC. The finished IC is then punched out of the "lead frame".

Der Erfindung liegt die Aufgabe zugrunde, einen störstrahlarmen, kostengünstigen induktiven Münzdetektor zu schaffen, der einfach einbaubar und im Münzprüfer anzuordnen ist.The invention has for its object to provide a low-interference, inexpensive inductive coin detector that is easy to install and can be arranged in the coin validator.

Die Erfindung besteht in den im Anspruch 1 angegebenen Merkmalen. Vorteilhafte Ausgestaltungen ergeben sich aus den abhängigen Ansprüchen.The invention consists in the features specified in claim 1. Advantageous refinements result from the dependent claims.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen näher erläutert.An exemplary embodiment of the invention is explained in more detail below with reference to the drawings.

Es zeigt:

Figur 1
einen Münzprüfer mit einem Münzdetektor,
Figur 2
den Münzdetektor im Querschnitt und
Figur 3
einen Ausschnitt aus einem bestückten Band.
It shows:
Figure 1
a coin validator with a coin detector,
Figure 2
the coin detector in cross section and
Figure 3
a section of an assembled volume.

In der Figur 1 bedeutet 1 einen Münzkanal in einem Münzprüfer, 2 eine Münze, 3 eine Spule, 4 eine Detektorschaltung, 5 ein Speisegerät und 6 eine Auswerteeinheit. Das Speisegerät 6 dient der Energieversorgung und ist über Speiseleitungen 7 mit der Detektorschaltung 4 und über Versorgungsleitungen 8 mit der Auswerteeinheit 6 verbunden. Eine Signalleitung 9 erstreckt sich von der Detektorschaltung 4 zur Auswerteeinheit 6 zum Uebertragen von Messignalen. Die Auswerteeinheit 6 analysiert auf vorbestimmte Weise die Messignale und kann über eine Befehlsleitung 10 eine Dienstleistung freigeben. Der Münzprüfer ist z. B. in einem öffentlichen Telephon oder in einem Verkaufsautomaten eingebaut und ermöglicht ein Auslösen der Dienstleistung mittels Münzen 2.In FIG. 1, 1 means a coin channel in a coin validator, 2 a coin, 3 a coil, 4 a detector circuit, 5 a feed device and 6 an evaluation unit. The supply device 6 is used for energy supply and is connected to the detector circuit 4 via supply lines 7 and to the evaluation unit 6 via supply lines 8. A signal line 9 extends from the detector circuit 4 to the evaluation unit 6 for transmitting measurement signals. The evaluation unit 6 analyzes the measurement signals in a predetermined manner and can release a service via a command line 10. The coin validator is e.g. B. in a public telephone or in a vending machine installed and enables the service to be triggered by means of coins 2.

Der Münzprüfer umfasst wenigstens einen induktiven Münzdetektor, der aus der Spule 3 und der Detektorschaltung 4 gebildet ist und als Abtastelement am Münzkanal 1 zum Messen einer vorbestimmten Grösse der Münze 2, wie Durchmesser der Münze 2, Art der Münzlegierung usw., oder zur Anwesenheitskontrolle der Münze 2 im Münzkanal 1 dient.The coin validator comprises at least one inductive coin detector, which is formed from the coil 3 and the detector circuit 4 and as a scanning element on the coin channel 1 for measuring a predetermined size of the coin 2, such as the diameter of the coin 2, the type of coin alloy, etc., or for checking the presence of the Coin 2 in coin channel 1 is used.

Die Spule 3 weist wenigstens eine flache spiralförmige Leiteranordnung 11 auf, damit die Spule 3 möglichst platzsparend am Münzkanal 1 angeordnet werden kann. Ein Wechselstrom in der Leiteranordnung 11 der Spule 3 erzeugt ein magnetisches Wechselfeld, das in Richtung zur Spulenachse 12 (Figur 2) den Münzkanal 1 senkrecht zu einer Laufrichtung 13 der Münze 2 durchdringt, beispielsweise derart, dass die Spulenachse 12 auch parallel zur Achse der sich an der Spule 3 vorbeibewegenden Münze 2 ausgerichtet ist.The coil 3 has at least one flat spiral conductor arrangement 11, so that the coil 3 can be arranged on the coin channel 1 in a space-saving manner. An alternating current in the conductor arrangement 11 of the coil 3 generates an alternating magnetic field which, in the direction of the coil axis 12 (FIG. 2), penetrates the coin channel 1 perpendicular to a running direction 13 of the coin 2, for example in such a way that the coil axis 12 is also parallel to the axis of the coin coin 2 moving past the coil 3 is aligned.

In der Figur 2 weist die Spule 3 (Figur 1) zwei beidseitig auf einer Isolierfolie 14 koaxial aufeinander ausgerichtete flache spiralförmige Leiteranordnungen 11 und 11' auf, die mittels einer Durchkontaktierung 16 durch das Zentrum 15 der Spule 3 hindurch miteinander elektrisch verbindbar sind. Die gestrichelt gezeichnete Spulenachse 12 steht senkrecht zur Ebene der Leiteranordnung 11 bzw. 11' und durchstösst das Zentrum 15. Die Leiteranordnung 11 bzw. 11' windet sich vom Zentrum 15 ausgehend um die Spulenachse 12 herum bis zur Peripherie der Leiteranordnung 11 bzw. 11' und endet in einem Spulenanschluss 17 bzw. 18. Jedes elektrische Leitermaterial ist für die Leiteranordnung 11, 11' verwendbar, jedoch ist Kupfer besonders kostengünstig.In FIG. 2, the coil 3 (FIG. 1) has two flat spiral conductor arrangements 11 and 11 ′ which are coaxially aligned on both sides on an insulating film 14 and which can be electrically connected to one another by means of a through-connection 16 through the center 15 of the coil 3. The coil axis 12 shown in dashed lines is perpendicular to the plane of the conductor arrangement 11 or 11 'and penetrates the center 15. The conductor arrangement 11 or 11' winds from the center 15 around the coil axis 12 to the periphery of the conductor arrangement 11 or 11 ' and ends in a coil connection 17 and 18, respectively. Any electrical conductor material can be used for the conductor arrangement 11, 11 ', but copper is particularly inexpensive.

Die beiden Leiteranordnungen 11 und 11' können mit der Durchkontaktierung 16 zu einer flachen zweilagigen Spule 3 verschaltet werden, deren Windungen aus den Leiteranordnungen 11 und 11' bestehen. Um die Induktivität der Spule 3 zu erhöhen, weisen beide Leiteranordnungen 11 und 11' den gleichen Windungssinn auf.The two conductor arrangements 11 and 11 'can be connected to a through connection 16 to form a flat two-layer coil 3, the windings of which consist of the conductor arrangements 11 and 11'. In order to increase the inductance of the coil 3, both conductor arrangements 11 and 11 'have the same winding sense on.

Ausserhalb der Leiteranordnung 11 ist auf der Isolierfolie 14 die Detektorschaltung 4 angeordnet. Ueber zwei kurze Brücken 19, 19' sind die Spulenanschlüsse 17, 18 der zweilagigen Spule 3 mit der Detektorschaltung 4 verbunden, wobei die eine Brücke 19' durch die Isolierfolie 14 hindurch auf die andere Seite zum Spulenanschluss 18 führt. Die Detektorschaltung 4 weist Anschlussflächen zur Kontaktierung auf, die über Verbindungen 20 an die Anschlussfahnen 21 für die Speiseleitungen 7 (Figur 1) und die Signalleitung 9 (Figur 1) angeschlossen sind.The detector circuit 4 is arranged on the insulating film 14 outside the conductor arrangement 11. The coil connections 17, 18 of the two-layer coil 3 are connected to the detector circuit 4 via two short bridges 19, 19 ', one bridge 19' leading through the insulating film 14 to the other side to the coil connection 18. The detector circuit 4 has connection surfaces for contacting, which are connected via connections 20 to the connection lugs 21 for the feed lines 7 (FIG. 1) and the signal line 9 (FIG. 1).

Zum Erzielen einer kleineren Induktivität kann die Spule 3 auch einlagig ausgeführt sein. Die Isolierfolie 14 kann nur auf der einen Seite die Leiteranordnung 11 tragen oder es ist nur die eine Leiteranordnung 11 bzw. 11' angeschlossen, wobei die Durchkontaktierung 16 fehlt. Die Brücken 19, 19' enden spulenseitig im Zentrum 15 und am Spulenanschluss 17 bzw. 18.To achieve a smaller inductance, the coil 3 can also be made in one layer. The insulating film 14 can only carry the conductor arrangement 11 on one side or only the one conductor arrangement 11 or 11 ′ is connected, the through-connection 16 being missing. The bridges 19, 19 ′ end on the coil side in the center 15 and on the coil connection 17 or 18.

Zur Erhöhung der Stabilität ist der Münzdetektor mit Vorteil in einem flachen Gehäuse 22 untergebracht. Durch Umspritzen der Spule 3 und der Detektorschaltung 4 mit einem Kunststoff ist kostengünstig ein stabiles flaches Gehäuse 22 herstellbar. Die beiden Flachseiten 23, 23' des Gehäuses 22 werden von der Spulenachse 12 senkrecht durchstossen. Die Anschlussfahnen 21 stellen durch das Material des Gehäuses 22 hindurch die Verbindung zu den Speiseleitungen 7 (Figur 1) und der Signalleitung 9 (Figur 1) her. Es ist auch möglich, anstelle der Anschlussfelder 21 direkt die Speiseleitungen 7 und die Signalleitung 9 als Drahtenden zum direkten Anschliessen an das Speisegerät 5 (Figur 1) und der Auswerteeinheit 6 (Figur 1) nach aussen zu führen, da bereits drei Adern für die notwendigen Leitungen 7, 9 zwischen dem Münzdetektor und dem Speisegeräte 5 und der Auswerteeinheit 6 ausreichend sind.To increase the stability, the coin detector is advantageously housed in a flat housing 22. By molding the coil 3 and the detector circuit 4 with a plastic, a stable, flat housing 22 can be produced inexpensively. The two flat sides 23, 23 'of the housing 22 are penetrated perpendicularly by the coil axis 12. The connection lugs 21 establish the connection to the feed lines 7 (FIG. 1) and the signal line 9 (FIG. 1) through the material of the housing 22. It is also possible to lead the supply lines 7 and the signal line 9 directly to the outside instead of the connection fields 21 as wire ends for direct connection to the supply device 5 (FIG. 1) and the evaluation unit 6 (FIG. 1), since there are already three wires for the necessary ones Lines 7, 9 between the coin detector and the power supply 5 and the evaluation unit 6 are sufficient.

Eine kostengünstige Herstellung der Münzdetektoren erfolgt hintereinander auf einer bandförmigen Isolierfolie 14, wobei sich die Anordnung der Spule 3, der Detektorschaltung 4, der Anschlussfahnen 21 und das Gehäuse 22, 22' in einem Registerabstand A längs der Isolierfolie 14 wiederholt.Inexpensive manufacture of the coin detectors takes place in succession on a ribbon-shaped insulating film 14, the arrangement of the coil 3, the detector circuit 4, of the Terminal lugs 21 and the housing 22, 22 'in a register spacing A along the insulating film 14 is repeated.

Die Detektorschaltung 4 ist auf einem Substrat 24 aus Leitermaterial aufgeklebt und umfasst, wie in der Figur 3 gezeigt ist, eine Oszillatorschaltung 25 und eine Messschaltung 26. Die Oszillatorschaltung 25 in Verbindung mit der Spule 3 (Figur 1) bildet einen LC-Oszillator mit der Spule 3 als Induktivität. Beispiele solcher LC-Oszillatoren sind im Buch "Halbleiter-Schaltungstechnik" von U. Tietze und Ch. Schenk, Springer-Verlag Berlin, 1978, ISBN 3-540-08628-5, Seiten 419 bis 430, 4. Aufl., beschrieben. Der von der Oszillatorschaltung 25 in der Spule 3 erzeugte Wechselstrom bewirkt das magnetische Wechselfeld des Münzdetektors im Münzkanal 1 (Figur 1). Ohne eine Münze 2 (Figur 1) im magnetischen Wechselfeld schwingt der LC-Oszillator auf einer vorbestimmten Leerlauffrequenz f₀. Sobald das Material der Münze 2 dem Wechselfeld Energie entzieht, verändert sich die Frequenz f des LC-Oszillators. Die Messschaltung 26 ist zum Messen der Frequenzabweichung δf = f - f₀ eingerichtet und sendet ein der Frequenzabweichung δf entsprechendes Signal über die Signalleitung 9 (Figur 1) zur Auswerteschaltung 6 (Figur 1).The detector circuit 4 is glued to a substrate 24 made of conductor material and, as shown in FIG. 3, comprises an oscillator circuit 25 and a measuring circuit 26. The oscillator circuit 25 in connection with the coil 3 (FIG. 1) forms an LC oscillator with the Coil 3 as an inductor. Examples of such LC oscillators are described in the book "Semiconductor Circuit Technology" by U. Tietze and Ch. Schenk, Springer-Verlag Berlin, 1978, ISBN 3-540-08628-5, pages 419 to 430, 4th edition. The alternating current generated by the oscillator circuit 25 in the coil 3 effects the alternating magnetic field of the coin detector in the coin channel 1 (FIG. 1). Without a coin 2 (FIG. 1) in the alternating magnetic field, the LC oscillator oscillates at a predetermined idle frequency f₀. As soon as the material of the coin 2 draws energy from the alternating field, the frequency f of the LC oscillator changes. The measuring circuit 26 is set up to measure the frequency deviation δf = f - f₀ and sends a signal corresponding to the frequency deviation δf via the signal line 9 (FIG. 1) to the evaluation circuit 6 (FIG. 1).

Wird über die Anschlussfahnen 21 elektrische Energie zugeführt, beginnt der LC-Oszillator des Münzdetektors zu schwingen, wobei die Induktivität der Spule 3 und ein parallel zur Spule 3 geschalteter Kondensator der Oszillatorschaltung 25 die Frequenz f₀ bestimmen. Da die Spule 3 und der Kondensator in der Oszillatorschaltung 25 sehr eng toleriert herstellbar sind, streut die Leerlauffrequenz f₀ in einem engen Band, so dass sich eine Abstimmung des LC-Oszillators auf die vorbestimmte Leerlauffrequenz f₀ erübrigen kann.If electrical energy is supplied via the connecting lugs 21, the LC oscillator of the coin detector begins to oscillate, the inductance of the coil 3 and a capacitor of the oscillator circuit 25 connected in parallel with the coil 3 determining the frequency f₀. Since the coil 3 and the capacitor in the oscillator circuit 25 can be manufactured with very tight tolerances, the idle frequency f stre scatters in a narrow band, so that tuning of the LC oscillator to the predetermined idle frequency ₀ is unnecessary.

Die Spule 3 besitzt je nach Windungszahl und der Anzahl in Serie geschalteter Leiteranordnungen 11, 11' (Figur 2) eine Induktivität zwischen 0,5 µH und 50 µH. Die zweilagige Spule 3 mit einem vorbestimmten Durchmesser von 14 mm beider Leiteranordnungen 11, 11' weist bei total 20 Windungen eine Induktivität von 2920 nH auf. Die einlagige Spule 3 besitzt mit der einen Leiteranordnung 11 von gleichem Durchmesser und 10 Windungen nur einen Viertel der Induktivität, d. h. 730 nH. Die Spulen 3 haben einen Gütefaktor Q im Bereich von 5 bis 10. Der gemessene Gütefaktor der einlagigen Spule 3 beträgt Q = 8. Für den Münzdetektor geeignete Leerlauffrequenzen f₀ liegen im Bereich von 1 MHz bis 20 MHz.Depending on the number of turns and the number of conductor arrangements 11, 11 '(FIG. 2) connected in series, the coil 3 has an inductance of between 0.5 μH and 50 μH. The two-layer coil 3 with a predetermined diameter of 14 mm of both conductor arrangements 11, 11 'has an inductance of 2920 nH with a total of 20 turns. The single-layer coil 3 has one conductor arrangement 11 of the same diameter and 10 turns only a quarter of the inductance, ie 730 nH. The coils 3 have a quality factor Q in the range from 5 to 10. The measured quality factor of the single-layer coil 3 is Q = 8. Suitable idle frequencies f₀ for the coin detector lie in the range from 1 MHz to 20 MHz.

Der Münzdetektor weist den Vorteil auf, dass wegen den kurzen Brücken 19, 19' zwischen der Oszillatorschaltung 25 und der Spule 3 ein störstrahlarmer und wegen der automatisierbaren Herstellung auch ein kostengünstiger Aufbau des LC-Oszillators möglich ist. Trotz der hohen Frequenzen f des LC-Oszillators strahlen die Speiseleitungen 7 und die Signalleitung 9 keine störenden elektromagnetischen Wellen ab, die die Funktion des Münzprüfers beeinträchtigen und den LC-Oszillator zusätzlich belasten würden. Der kompakte Münzdetektor ist einfach im Münzprüfer am Münzkanal 1 anzuordnen und zeichnet sich durch einen niedrigen Stromverbrauch aus.The coin detector has the advantage that, because of the short bridges 19, 19 'between the oscillator circuit 25 and the coil 3, the LC oscillator can be constructed with little interference and because of the automatable manufacture, it can also be inexpensively constructed. In spite of the high frequencies f of the LC oscillator, the feed lines 7 and the signal line 9 do not emit any interfering electromagnetic waves which would impair the function of the coin validator and would further burden the LC oscillator. The compact coin detector is easy to place in the coin validator on coin channel 1 and is characterized by low power consumption.

Der Münzdetektor ist auch generell als Sensor verwendbar, der eine Annäherung eines Metallstücks mit dem Wechselfeld der Spule 3 feststellt.The coin detector can also be used generally as a sensor which detects an approach of a piece of metal with the alternating field of the coil 3.

Die Oszillatorschaltung 25 und die Messschaltung 26 können auf einem Si-Waferchip in CMOS-Technologie ausgeführt sein. Diese Massnahme senkt die Stromaufnahme der Detektorschaltung 4 auf weniger als 30 µA bei einer Speisespannung von 5 V, wenn der LCOszillator mit der einlagigen Spule 3 bei der Leerlauffrequenz f₀ von etwa 16 MHz schwingt.The oscillator circuit 25 and the measuring circuit 26 can be implemented on a Si wafer chip in CMOS technology. This measure lowers the current consumption of the detector circuit 4 to less than 30 μA at a supply voltage of 5 V when the LCO oscillator with the single-layer coil 3 oscillates at the idle frequency f₀ of approximately 16 MHz.

Die Isolierfolie 14 weist wenigstens auf einer Seite die Leiteranordnung 11 bzw. 11', die Anschlussfahnen 21 sowie das Substrat 24 auf. Diese Leiterstücke 11, 17, 21 und 24 bzw. 11, 11', 17, 18, 21 und 24 aus einem elektrischen Leitermaterial können in einem Druckverfahren bzw. durch Aufdampfen oder Abscheiden ein-oder beidseitig auf die Isolierfolie 14 aufgebracht werden. Nachfolgend ist beispielhaft die schrittweise Herstellung der Münzdetektoren beschrieben, wobei die Leiterstücke 11, 17, 21 und 24 bzw. 11, 11', 17, 18, 21 und 24 aus dem ein- oder beidseitig auf die Isolierfolie 14 kaschierten Leitermaterial heraus geätzt sind. Das elektrische Leitermaterial weist eine Dicke von 0,01 mm bis 0,15 mm oder mehr auf. Das dickere Leitermaterial bewirkt eine vorteilhafte Steifigkeit der Anschlussfahnen 21.The insulating film 14 has the conductor arrangement 11 or 11 ′, the connecting tabs 21 and the substrate 24 on at least one side. These conductor pieces 11, 17, 21 and 24 or 11, 11 ', 17, 18, 21 and 24 made of an electrical conductor material can be applied to the insulating film 14 on one or both sides in a printing process or by vapor deposition or deposition. The step-by-step manufacture of the coin detectors is described below by way of example, the conductor pieces 11, 17, 21 and 24 or 11, 11 ', 17, 18, 21 and 24 are etched out of the conductor material laminated onto the insulating film 14 on one or both sides. The electrical conductor material has a thickness of 0.01 mm to 0.15 mm or more. The thicker conductor material brings about an advantageous rigidity of the connecting lugs 21.

Als flexible Isolierfolie 14 kann ein Band 27 einer im Handel üblichen KAPTON(R)-Folie von 70 µm Dicke mit einer ein- bzw. beidseitigen Auflage von 17 µm Kupfer verwendet werden.A tape 27 of a commercially available KAPTON (R) film 70 μm thick with a one- or both-sided layer of 17 μm copper can be used as the flexible insulating film 14.

Das Herstellverfahren gliedert sich in die Schritte:

  • a) In eine Randzone 28 oder in beide Randzonen 28, 28' längs des Bandes 27 werden zuerst wenigstens im Registerabstand A Positionierlöcher 29, 29' eingestanzt. Gleichzeitig wird im Registerabstand A ein Trägerblatt 30 bis auf schmale Stege 31 zu den Randzonen 28, 28' und beide Randzonen 28, 28' verbindende Querstegen 32 freigestanzt. Die Querstege 32 verleihen dem Band 27 eine zur Weiterverarbeitung ausreichende Stabilität.
  • b) Im Registerabstand A werden ausgerichtet auf die Positionierlöcher 29, 29' für die Leiterstücke 11, 17, 21 und 24 bzw. 11, 11', 17, 18, 21 und 24 vorgesehenen Flächen mit Aetzmasken 33 abgedeckt. In der Zeichnung der Figur 3 ist ein symbolischer Teil der Aetzmaske 33 durch Schraffur hervorgehoben.
  • c) Das neben den Aetzmasken 33 freiliegende Leitermaterial wird weggeätzt,
  • d) Die Aetzmasken 33 werden mit Hilfe von Lösungsmitteln durch Waschen entfernt,
  • e) Auf die Positionierlöcher 29, 29' ausgerichtet wird das Substrat 24 mit der Detektorschaltung 4 auf einer freigeätzten Fläche des Trägerblatts 30 befestigt. Die Anschlussfahnen 21 werden über die Verbindungen 20 an die Detektorschaltung 4 angeschlossen.
  • f) Die Oszillatorschaltung 25 wird über die Brücken 19, 19' bei der einlagigen Spule 3 mit dem Zentrum 15 und dem Spulenanschluss 17 oder bei der zweilagigen Spule 3 mit den beiden Spulenanschlüssen 17 und 18 zum LC-Oszillator verbunden, wobei bei der zweilagigen Spule 3 zusätzlich die Durchkontaktierung 16 (Figur 2) im Zentrum 15 hergestellt wird.
  • g) Auf die Positionierlöcher 29, 29' ausgerichtet wird das Trägerblatt 30, das mit der Spule 3 und mit der Detektorschaltung 4 bestückt ist, zusammen mit den Anschlussfahnen 21 mit einem Kunststoff umpresst, so dass der Kunststoff das gestrichelt gezeichnete flache Gehäuse 22 bildet, wobei vom Trägerblatt 30 her gesehen, etwa das erste Viertel jedes Steges 31 im Gehäuse 22 eingeschlossen ist und die aufeinander folgenden Gehäuse 22, 22' (Figur 2) im Bereich der Querstege 32 wenigstens um deren Breite getrennt sind.
  • h) Die Münzdetektoren werden durch Abtrennen der Stege 31 und Freistanzen der Anschlussfahnen 21 aus dem Quersteg 32 als integrierter Baustein einbaufertig aus dem Band 27 vereinzelt.
The manufacturing process is divided into the following steps:
  • a) Positioning holes 29, 29 'are first punched into an edge zone 28 or in both edge zones 28, 28' along the strip 27, at least in register spacing A. At the same time, a carrier sheet 30 is punched out in register spacing A except for narrow webs 31 to the edge zones 28, 28 'and cross webs 32 connecting both edge zones 28, 28'. The transverse webs 32 give the band 27 sufficient stability for further processing.
  • b) In register spacing A, aligned with the positioning holes 29, 29 'for the conductor pieces 11, 17, 21 and 24 or 11, 11', 17, 18, 21 and 24, surfaces provided with etching masks 33 are covered. In the drawing in FIG. 3, a symbolic part of the etching mask 33 is highlighted by hatching.
  • c) the conductor material exposed next to the etching masks 33 is etched away,
  • d) the etching masks 33 are removed with the aid of solvents by washing,
  • e) Aligned with the positioning holes 29, 29 ′, the substrate 24 is fastened with the detector circuit 4 on an etched-off surface of the carrier sheet 30. The connection lugs 21 are connected to the detector circuit 4 via the connections 20.
  • f) The oscillator circuit 25 is connected via bridges 19, 19 'in the single-layer coil 3 to the center 15 and the coil connection 17 or in the two-layer coil 3 with the two coil connections 17 and 18 to the LC oscillator, with the two-layer coil 3 the via 16 (FIG. 2) is additionally produced in the center 15.
  • g) Aligned with the positioning holes 29, 29 ', the carrier sheet 30, which is equipped with the coil 3 and with the detector circuit 4, is pressed together with the connecting lugs 21 with a plastic, so that the plastic forms the flat housing 22 shown in broken lines, viewed from the carrier sheet 30, approximately the first quarter of each web 31 is enclosed in the housing 22 and the successive housings 22, 22 '(FIG. 2) in the region of the cross webs 32 are separated by at least their width.
  • h) The coin detectors are separated from the strip 27 ready for installation by separating the webs 31 and punching out the connecting lugs 21 from the crossbar 32 as an integrated module.

Die Spule 3 wird als Teil des "lead frame" zusammen mit dem Substrat 24 und den Anschlussfahnen 21 aus dem Band 27 erzeugt. Der Vorteil dieses Verfahrens ist seine Eignung zur automatisierbaren Herstellung des Münzdetektors, da alle Verbindungen 16, 19, 19', 20 auf dem Trägerblatt 30 mittels Bonden von dünnen Drähten kostengünstig ausführbar sind, wenn die Detektorschaltung 4 auf einem Halbleiterchip integriert ist und der frequenzbestimmende Kondensator der Oszillatorschaltung 25 als getrenntes Bauelement 25' auf dem Substrat 24 angeordnet und direkt mit den Spulenanschlüssen 17, 18 verbunden ist.The coil 3 is produced as part of the “lead frame” together with the substrate 24 and the connecting tabs 21 from the band 27. The advantage of this method is its suitability for the automated manufacture of the coin detector, since all connections 16, 19, 19 ', 20 on the carrier sheet 30 can be carried out inexpensively by bonding thin wires if the detector circuit 4 is integrated on a semiconductor chip and the frequency-determining capacitor the oscillator circuit 25 is arranged as a separate component 25 'on the substrate 24 and is connected directly to the coil connections 17, 18.

Zwischen den Verfahrensschritten f) und g) kann der Münzdetektor abgeglichen werden, wobei in der Messschaltung 26 der Wert der am LC-Oszillator gemessenen Leerlauffrequenz f₀ für die Berechnung der Frequenzabweichung δf gespeichert wird.The coin detector can be adjusted between method steps f) and g), the value of the idle frequency f₀ measured at the LC oscillator being stored in the measuring circuit 26 for the calculation of the frequency deviation δf.

Das Herstellverfahren kann für zweilagige Spulen 3 dahingehend modifiziert werden, dass zuerst die Leiteranordnungen 11 auf dem einseitig kaschierten Band 27 nach den Herstellschritten a) bis d) erzeugt werden. Anschliessend werden die leiterfreien Seiten zweier so behandelten, identischen Bänder 27 auf die Positionierlöcher 29, 29' ausgerichtet zu einem Verbundstreifen zusammengefügt, wobei die Leiteranordnungen 11 auf beiden Seiten des Verbundstreifens auch koaxial und im gleichen Windungssinn angeordnet sind. Der Verbundstreifen wird in den folgenden Herstellschritten e) bis h) wie ein zweiseitig kaschiertes Band 27 weiterverarbeitet.The manufacturing process can be for two-layer coils 3 are modified so that the conductor arrangements 11 are first produced on the belt 27 laminated on one side after the production steps a) to d). Subsequently, the conductor-free sides of two identical strips 27 treated in this way are aligned with the positioning holes 29, 29 'and joined to form a composite strip, the conductor arrangements 11 on both sides of the composite strip also being arranged coaxially and in the same winding direction. The composite strip is processed in the following manufacturing steps e) to h) like a double-sided tape 27.

Claims (8)

Münzdetektor zum induktiven Abtasten von sich in einem Münzkanal (1) bewegenden Münzen (2) mittels eines hochfrequenten magnetischen Wechselfeldes, mit einem LC-Oszillator zum Erzeugen des hochfrequenten Wechselstromes und einer am Münzkanal (1) angeordneten, vom Wechselstrom durchflossenen Spule (3) zum Erzeugen des senkrecht zur Münzlaufrichtung (13) den Münzkanal (1) durchdringenden Wechselfeldes,
dadurch gekennzeichnet,
   dass die Spule (3) wenigstens eine flache spiralförmige Leiteranordnung (11; 11') auf einer flexiblen Isolierfolie (14) umfasst,
   dass eine Detektorschaltung (4) mit ihrem Substrat (24) auf der Isolierfolie (14) ausserhalb der Leiteranordnung (11; 11') angeordnet ist, welche eine Oszillatorschaltung (25) und eine die Frequenz (f₀; f) des LC-Oszillators überwachende Messschaltung (26) zum Erkennen der Anwesenheit der Münze (2) umfasst,
   dass die Spule (3) und die Oszillatorschaltung (25) den LC-Oszillator bilden und
   dass die Detektorschaltung (4) zur Energieversorgung über eine zweipolige Speiseleitung (7) mit einem Speisegerät (5) des Münzprüfers und zur Signalübermittlung über eine Signalleitung (9) mit einer Erkennungsschaltung (6) des Münzprüfers verbunden ist.Coin detector for inductive scanning of coins (2) moving in a coin channel (1) by means of a high-frequency magnetic alternating field, with an LC oscillator for generating the high-frequency alternating current and a coil (3) arranged on the coin channel (1) and through which the alternating current flows Generating the alternating field penetrating the coin channel (1) perpendicular to the direction of coin movement (13),
characterized,
that the coil (3) comprises at least one flat spiral conductor arrangement (11; 11 ') on a flexible insulating film (14),
that a detector circuit (4) with its substrate (24) on the insulating film (14) is arranged outside the conductor arrangement (11; 11 '), which has an oscillator circuit (25) and monitors the frequency (f₀; f) of the LC oscillator Measuring circuit (26) for detecting the presence of the coin (2),
that the coil (3) and the oscillator circuit (25) form the LC oscillator and
that the detector circuit (4) is connected to a feed device (5) of the coin validator via a two-pole feed line (7) and to a detection circuit (6) of the coin validator for signal transmission via a signal line (9). Münzdetektor nach Anspruch 1, dadurch gekennzeichnet, dass zum Schutz die Spule (3) und die Detektorschaltung (4) in ein flaches Gehäuse (22; 22') aus Kunststoff eingegossen sind und dass die Ebene der Leiteranordnung (11; 11') parallel zu beiden Flachseiten (23; 23') des Gehäuses (22; 22') angeordnet sind.Coin detector according to claim 1, characterized in that for protection the coil (3) and the detector circuit (4) are cast in a flat housing (22; 22 ') made of plastic and that the plane of the conductor arrangement (11; 11') is parallel to two flat sides (23; 23 ') of the housing (22; 22') are arranged. Münzdetektor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass auf dem der Isolierfolie (14) wenigstens drei Anschlussfahnen (21) aus Leitermaterial zur Zugsentlastung vorhanden sind, auf denen die Leitungen (7; 9) anschliessbar sind und dass die Detektorschaltung (4) mit den Anschlussfahnen (21) über Verbindungen (20) verbunden ist.Coin detector according to claim 1 or 2, characterized in that on the insulating film (14) there are at least three connecting lugs (21) made of conductor material for strain relief, on which the lines (7; 9) can be connected and that the detector circuit (4) is connected the connecting lugs (21) Connections (20) is connected. Münzdetektor nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zur Erhöhung der Induktivität der Spule (3) wenigstens eine Isolierfolie (14) zwischen zwei koaxial ausgerichteten Leiteranordnungen (11; 11') eingeschlossen ist, die in ihrem Zentrum (15) elektrisch über eine Durchkontaktierung (16) miteinander zur Spule (3) verbunden sind.Coin detector according to one of Claims 1 to 3, characterized in that, in order to increase the inductance of the coil (3), at least one insulating film (14) is enclosed between two coaxially aligned conductor arrangements (11; 11 ') which are electrical in their center (15) are connected to one another via coil (16) to form coil (3). Münzdetektor nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Oszillatorschaltung (25) und die Messschaltung (26) auf einem Si-Waferchip integrierte Schaltungen der Detektorschaltung (4) sind.Coin detector according to one of claims 1 to 4, characterized in that the oscillator circuit (25) and the measuring circuit (26) are integrated circuits of the detector circuit (4) on a Si wafer chip. Verfahren zur Herstellung eines induktiven Münzdetektors nach Anspruch 2 oder 3, welches Verfahren folgende Schritte umfasst, a) Stanzen von Positionierlöchern (29; 29') in das einseitig mit Leitermaterial kaschierte Band (27) aus der flexiblen Isolierfolie (14) in vorbestimmten Abständen (A) in Randzonen (28; 28') und Freistanzen eines Trägerblatts (30) aus dem Band (27), das über schmale Stege (31) mit den Randzonen (28; 28') und mit die Randzonen (28; 28') verbindenden Querstegen (32) verbunden bleibt, b) Abdecken der Leiterteile (11, 17; 21; 24) im Register der Positionierlöcher (29; 29') mittels auf dem Leitermaterial angeordneten Aetzmasken (33), c) Wegätzen des freiliegenden überflüssigen Leitermaterials, d) Entfernen der Aetzmasken (33), f) Befestigen der Detektorschaltung (4) auf dem Substrat (24) im Register der Positionierlöcher (29; 29') auf einer freigeätzten Fläche des Trägerblatts (30), die Anschlussfahnen (21) über Verbindungen (20) an die Detektorschaltung (4) anschliessen und Brücken (19) zum Verbinden der Oszillatorschaltung (25) mit der Spule (3) erzeugen, um den LC-Oszillator zu bilden, g) Umpressen des bestückten Trägerblatts (30) mit einem Kunststoff, so dass der Kunststoff das flache Gehäuse (22; 22') bildet, dessen Flachseiten (23; 23') parallel zur Ebene der Leiteranordnung (11 bzw. 11') ausgerichtet sind, und h) Durchtrennen der Stege (31) und Freischneiden der Anschlussfahnen (21). A method for producing an inductive coin detector according to claim 2 or 3, which method comprises the following steps, a) punching positioning holes (29; 29 ') into the band (27) laminated on one side with conductor material from the flexible insulating film (14) at predetermined intervals (A) in edge zones (28; 28') and punching out a carrier sheet (30) the band (27), which remains connected to the edge zones (28; 28 ') and to cross webs (32) connecting the edge zones (28; 28') via narrow webs (31), b) covering the conductor parts (11, 17; 21; 24) in the register of the positioning holes (29; 29 ') by means of etching masks (33) arranged on the conductor material, c) etching away the exposed superfluous conductor material, d) removing the etching masks (33), f) fastening the detector circuit (4) on the substrate (24) in the register of the positioning holes (29; 29 ') on an etched-off surface of the carrier sheet (30), the connecting lugs (21) via connections (20) to the detector circuit (4) connect and bridges (19) to connect the oscillator circuit (25) with the Generate coil (3) to form the LC oscillator, g) pressing the loaded carrier sheet (30) with a plastic so that the plastic forms the flat housing (22; 22 '), the flat sides (23; 23') of which are aligned parallel to the plane of the conductor arrangement (11 or 11 ') , and h) cutting through the webs (31) and cutting out the connecting lugs (21). Verfahren zur Herstellung eines induktiven Münzdetektors nach Anspruch 4, welches Verfahren folgende Schritte umfasst, a) Stanzen von Positionierlöchern (29; 29') in das beidseitig mit Leitermaterial kaschierte Band (27) aus der flexiblen Isolierfolie (14) in vorbestimmten Abständen (A) in Randzonen (28; 28') und Freistanzen eines Trägerblatts (30) aus dem Band (27), das über schmale Stege (31) mit den Randzonen (28; 28') und mit die Randzonen (28; 28') verbindenden Querstegen (32) verbunden bleibt, b) Abdecken der Leiterteile (11, 17; 11', 18; 21; 24) im Register der Positionierlöcher (29; 29') mittels auf dem Leitermaterial angeordneten Aetzmasken (33), c) Wegätzen des freiliegenden überflüssigen Leitermaterials, d) Entfernen der Aetzmasken (33), f) Befestigen der Detektorschaltung (4) auf dem Substrat (24) im Register der Positionierlöcher (29; 29') auf einer freigeätzten Fläche des Trägerblatts (30), die Anschlussfahnen (21) über Verbindungen (20) an die Detektorschaltung (4) anschliessen, Verbinden der beiden Leiteranordnungen (11, 17; 11', 18) mit einer Durchkontaktierung (16) und Brücken (19) zum Verbinden der Oszillatorschaltung (25) mit der Spule (3) erzeugen, um den LC-Oszillator zu bilden, g) Umpressen des bestückten Trägerblatts (30) mit einem Kunststoff, so dass der Kunststoff das flache Gehäuse (22; 22') bildet, dessen Flachseiten (23; 23') parallel zur Ebene der Leiteranordnungen (11, 17; 11', 18) ausgerichtet sind, und h) Durchtrennen der Stege (31) und Freischneiden der Anschlussfahnen (21). Method for producing an inductive coin detector according to claim 4, which method comprises the following steps, a) punching positioning holes (29; 29 ') into the band (27) laminated with conductor material on both sides from the flexible insulating film (14) at predetermined intervals (A) in edge zones (28; 28') and punching out a carrier sheet (30) the band (27), which remains connected to the edge zones (28; 28 ') and to cross webs (32) connecting the edge zones (28; 28') via narrow webs (31), b) covering the conductor parts (11, 17; 11 ', 18; 21; 24) in the register of the positioning holes (29; 29') by means of etching masks (33) arranged on the conductor material, c) etching away the exposed superfluous conductor material, d) removing the etching masks (33), f) fastening the detector circuit (4) on the substrate (24) in the register of the positioning holes (29; 29 ') on an etched-off surface of the carrier sheet (30), the connecting lugs (21) via connections (20) to the detector circuit (4) connect, connect the two conductor arrangements (11, 17; 11 ', 18) with a plated-through hole (16) and create bridges (19) for connecting the oscillator circuit (25) to the coil (3) to form the LC oscillator, g) pressing the loaded carrier sheet (30) with a plastic so that the plastic forms the flat housing (22; 22 '), the flat sides (23; 23') of which are parallel to the plane of the conductor arrangements (11, 17; 11 ', 18th ) are aligned, and h) cutting through the webs (31) and cutting out the connecting lugs (21). Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Verbindungen (19; 19'; 20 bzw. 16; 19; 19'; 20) mittels Bonden von dünnen Drähten hergestellt werden.A method according to claim 6 or 7, characterized in that the connections (19; 19 '; 20 or 16; 19; 19'; 20) are made by bonding thin wires.
EP93107938A 1992-06-03 1993-05-15 Coin sensor Expired - Lifetime EP0572847B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1782/92 1992-06-03
CH178292 1992-06-03

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EP0572847A1 true EP0572847A1 (en) 1993-12-08
EP0572847B1 EP0572847B1 (en) 1998-08-26

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EP93107938A Expired - Lifetime EP0572847B1 (en) 1992-06-03 1993-05-15 Coin sensor

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US (2) US5411126A (en)
EP (1) EP0572847B1 (en)
KR (1) KR0165135B1 (en)
AT (1) ATE170312T1 (en)
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DK (1) DK0572847T3 (en)

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DE10048290A1 (en) * 2000-09-29 2002-05-08 Balluff Gebhard Feinmech Inductive sensor

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US6896826B2 (en) * 1997-01-09 2005-05-24 Advanced Technology Materials, Inc. Aqueous cleaning composition containing copper-specific corrosion inhibitor for cleaning inorganic residues on semiconductor substrate
JP2004227133A (en) * 2003-01-21 2004-08-12 Internatl Currency Technologies Corp Detector of coin receiving device
TWI227502B (en) * 2003-09-02 2005-02-01 Ind Tech Res Inst Precise multi-pole magnetic components and manufacturing method thereof
JP5924686B2 (en) * 2012-09-28 2016-05-25 株式会社日本コンラックス Coin processing equipment
JP6992445B2 (en) * 2017-11-27 2022-01-13 富士電機株式会社 Coin detection antenna and coin processing device
CN112406318B (en) * 2020-11-24 2023-07-21 武汉先同科技有限公司 Ink quantity detection device and method based on inductance technology and ink-jet printer

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EP0918306A3 (en) * 1997-11-19 1999-10-06 Tetrel Limited Inductive coin validation system and payphone using it
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DE59308911D1 (en) 1998-10-01
DK0572847T3 (en) 1999-05-25
ATE170312T1 (en) 1998-09-15
KR0165135B1 (en) 1999-03-20
US5411126A (en) 1995-05-02
US5575057A (en) 1996-11-19
EP0572847B1 (en) 1998-08-26
KR940001014A (en) 1994-01-10

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