DE3006893A1 - Coin tester and counter - has direction-sensitive switch and circuit with detecting stage for irregular movements to prevent use of coin on thread - Google Patents

Abstract

The coin tester prevents false operation by use of a genuine coin attached to a fire thread that safely passes a mechanical or electronic testing station and is then moved to and fro in a following contact zone. The pulse generating section, receiving the coins passed by the testing section, consists of a direction-sensitive switch with an electrical circuit. The latter contains a switching stage that detects irregular coin movements and blocks functions. The circuit can be coupled to the coin testing section or a memory circuit so that they can be blocked upon detection of irregular movement of coins. The switching stage can affect all the switching components of the pulse generating section, upon detection of irregular coin movement, so that an output signal is not produced.

Description

Fraud investigator coin validator.

The invention relates to a fraud-proof voucher, in particular the Is secured against the so-called "trick trick".

This trick, which works with mechanical as well as electronic ones Coin validators of known types is applicable, consists in the insertion of one on one thin thread attached coin, which passed the test stations properly and which are then stopped or moved back and forth in a subsequent contact zone can.

It should be noted at the outset that coin validators in the context of this invention are to be understood as any combination of checking devices for coins with contact devices. This can involve mechanical or electrical or electronic coin devices in which contact devices of any type serving to generate pulses are integrated, or in which these are directly or indirectly mlto fer are connected. The direct connection can, for example, consist of a coin validator and any contact device that is directly electrically connected or only mechanically connected to it, the indirect connection can, for example, consist of an electrical or functional connection of these two units via a central unit (microprocessor or the like).

The idea of the invention disclosed below relates not only to coin validators, but also to all other areas of application where an object is to be detected at one point and the definitive arrival in a sorting channel at a more distant point s 4 X Fs 5 p noted must become.

According to the previous state of the art, the so-called thread trick and similar tricks have been countered by various constructions, all of which have deficiencies: Devices have become known in which the coin is guided over the sensors of microswitches or the like and the snap-back lever of these switches, which are usually equipped with a switching hysteresis that prevents a so-called thread coin from being withdrawn. If two coins are passed one after the other into such a device, of which at least the lower one is hanging on a thread, then a quasi-flat, elongated structure is created, the part of which, consisting of the upper coin, engages prevented and relieved a repeated back and forth movement. This device is therefore not secure against @ fraudulent requests.

So-called thread clamps have also become known, which cause the Clamp the weight of the hanging coin tight thread at a deflection point, e.g. in the turns of a curved spiral spring. Here is the to-and-fro movement switched off. However, this also includes the coin validator and thus the whole Machine blocked for further use.

The object of the invention is therefore to provide a coin validator or

to design a coin check and counting advance in such a way that entrants of the type described can be prevented with absolute certainty and at the same time a temporary suspension of the operational readiness of the machines connects will.

According to the invention, this object is achieved in that as Contact device uses one or more directional switches.

These switches can be microswitches, fotoeiktriscbe, inductive, capacitive or magnetically influenced switches of any type or around Combinations of the same bandeln.

Directional switches are already used in other areas of technology known. E.g. in HENNIG, FOTOELEKTRONIK (ISBN 3-7723-6101-3) on page 132 -135 the prior art is essentially described. All previously known directional ones However, switches do not solve the task at all or only partially. The required Security against manipulated receipts each kind requires more comprehensive ones Solutions.

According to a first proposal of the invention, a direction-recognizing device is therefore used Switches of any construction are used, which only work in the prescribed direction the switch is completely captured by hurrying coins and generates a signal for them, one of the switching stages signaling a blocking state contains which in the case of irregular Coin movement responds and the one with a measuring, recognition or memory circuit MünzprUfers is connected and thus by means of the switching stage indicating the blocking state can prevent the measurement and / or annabme of further coins until both of the irregular coin movement has been determined, with leaving as the determination criterion the contact zone applies in the prescribed direction.

According to a second proposal of the invention, an advanced one can be used Implementation of a direction-sensing switch according to the invention in such a way that it is designed in such a way that a first proper coin movement in the prescribed Direction produces an output signal that is a subsequent irregular movement of any kind (pulling up, moving back and forth) is noted, and that one on this irregular movement following whole pass in the prescribed direction does not give rise to a signal, but such a regular movement is accompanied by a subsequent one Coin. Such a switch according to the invention operates from one and the same coin only one signal at a time. Such a switch can also be used to influence the coin validator can be used in any way, is required But not because the coin validator only inserts a certain number of correct coins conducts the acceptance path and only a single impulse is generated with each coin can.

Embodiments for both solutions shown are below described.

A directional switch according to this invention is thereby characterized in that it has so many switching elements that these at least three defined shadow statements or switching states result and are queried can.

According to the previous and the following explanations about this Invention one can achieve this in two ways: one can at least Arrange three switching elements one after the other in the direction of movement of the coin and evaluate whether all three have been actuated in the prescribed sequence one according to the rules of technology and the inventive concept disclosed below a logic circuit can be created which recognizes irregular movements and reacts in the desired ice.

But you can also reduce the cost of switching elements of at least three reduce to only two by looking for a very useful proposal of the invention these are so closely spaced that a coin is in one position of passage both scarf elements operated at the same time, so switched overlapping. Such an execution is characterized by the fact that there are three logical states, namely the first Switching element actuated "first and second switching element actuated and the second Switching element actuated ".

It is necessary to obtain at least three switching states if, in addition to the directional recognition, there are also backward movements after the task of the invention and any intermediate states are to be recorded.

Another proposal of the invention is aimed at the switching signals to differentiate the individual switching elements at least in part. Necessary is this measure does not. However, this proposal according to the invention is particularly useful, because in this way the complexity of a circuit to be used is considerably reduced and because it allows a particularly simple way of determining whether a Coin has a certain: switch "just reached" or just left ", depending according to whether the leading edge or the trailing edge of a signal is evaluated.

Another suggestion of the invention includes the design the electrical circuit of the proposed new coin operated switch in such a way that that these are switched on for the first time and after each correct coin passage a defined initial state is reached. This initial state must also be achieved be after a coin after previous irregular movement dek last Has left the switching element in the prescribed direction. This configuration too is described below.

It should be noted that the individual switching elements of the inventive The directional coin switch can also work together with a central unit can (microprocessor or the like.), which the processing of the delivered signals after takes over the thought of this connection.

The coin switch according to the invention is also designed so that it does not generate an evaluable signal if a coin - is withdrawn or stopped in the opposite direction before completing a cycle in the prescribed direction, - after completing a iif cycle in the R: $ JG gls G4-f 46C Withdrawn and thereby only allows some of the possible switching states to arise contrary to the prescribed sequence, - after completing one z JX "« / ffi44 Ric u retired Running in the prescribed manner and thereby creating all possible switching states, but in an incorrect sequence.A particularly advantageous and advanced version is also designed in such a way that it does not generate a usable signal if a coin - after completing a proper cycle in the opposite direction is completely withdrawn and then hurries through the Mtazseebalter again in the correct direction.

Another one that contributes particularly to the security of being outwitted The proposal of the invention consists in not using the coin switch according to the invention only to be used to generate counting pulses, but to use it with the measuring and evaluation circuit of an electronic coin validator in such a way that it is logically linked for the storage part of such a coin validator the AND condition for a counter output signal supplies.

The resetting of a just memory in the coin validator can be effected internally by this or the coin switch according to the invention can be on the other hand, a reset pulse by evaluating the trailing edge of its output signal generate (in the event that its electrical circuit is an output pulse limiting time step) or the switching of the ore in the appropriate coin switch can receive a reset pulse from the coin validator (in the event that he a digital memory - flip-flop or the like.) Contains.

The proposed logical link between the coin switch and the Memory circuit of an electronic coin validator allows the implementation of a another very useful proposal of this invention, which consists in that for monitoring mebrerer Münzleitkanäle only one switch according to this invention is used: an electronic coin validator is used for several coin types each have their own storage tank, in which case it is the task of the minister in the delivery of a confirmation signal coin arrived ". Since only a memory can be set by several, this acknowledgment signal can all The proposed invention has its own economic importance is therefore that its higher expenditure due to savings is at least partially compensated again at switches.

Exemplary embodiments are described below, along with others Explanations of the invention made.After these examples are with the means Further modifications are possible in the art, which also fall under this invention.

In Fig. 1 an exemplary embodiment is described in the form of a block diagram, where three switching states are obtained by three switching elements.

An exemplary embodiment is described in FIG. 2, where three switching states can be obtained by just two switching elements.

In Fig. 1 a coin moving downwards is denoted by loo, three form elements are differentiating stages with 1, 2 and 3, inserted in their output lines with 10, 20 and 30. The leading edge of the signal from switching element 1 leaves a set signal for flip-flop 12 is generated at gate 11 if blocking circuit 25 is not is set.

Flip-flop 22 can be set by AND gate 21 when switching element 2 via differentiator So a signal is generated bat and flip-flop ¢ is set.

AND gate 31 can trigger a timing stage 32 when switching element 3 supplies a signal via differentiating stage 30 (preferably the trailing edge) and flip-flop 22 and flip-flop 12 are set. The started time stage 32 supplies an output signal via line 28 which, according to the proposals made, is to be used in many ways. A further differentiating stage can be inserted in line 28, because it evaluates the trailing edge and can be used to reset any switching elements as well as the coin switch and connected circuits (coin validator, central unit or the like) When the coin is withdrawn, switching element 3 supplies a signal which leaves gate 31 inoperative because flip-flops 12 and 22 have been cleared beforehand via line 28o branched off from the output of timer 32 - possibly with a slight time delay. Since the signal from switching element 3 is present and the two flip-flops 12 and 22 are not present - in the example only flip-flop 22 is activated - gate 24 can supply an output signal for energizing blocking stage 25. This prevents the setting of flip-flop 12 and thus indirectly also flip-flop 22. Any movements of the coin - regardless of whether up or down or in conjunction with a second thread coin - can therefore not create the AND conditions for gate 31. The output signal via line 29 can prevent the function of a coin validator - e.g. its further coin acceptance - and / or destroy stored measurements of the coins that have been followed.

Setting conditions for the flip-flops 12 and 22 can no longer arise as long as the locking device 25 is energized. When the coin finally drops down from any position above switching element 3, gate 24 will in turn deliver an output signal. A two-way circuit 240 in its connecting line to blocking device 25 is designed in such a way that a first pulse via line 241 triggers the blocking circuit 25gg t be} The following pulse via OR gate 243 and line 242 releases them, the next pulse continues or continues and so on.

With 244 there is a Lwitung from a coin validator or a central unit denotes with which the circuit via OR gate 243 and line 242 an external Reset pulse can be supplied. You can set both signals for the blocking circuit 25 or just use one of the two.

In Fig.2 two switching elements with 1 and 2 are drawn, a coin with loo. With a prescribed downward movement, this first becomes a switching element 1, then as shown both switching elements at the same time and finally only actuate the lower switching element. The signal from switching element 1 is from a Differentiation stage lo fed to the evaluation of its leading edge and reports that a coin coming from above has just reached the switching element 1. Because about this Point in time - which must be the case with the prescribed direction of movement Switching element 2 is not yet excited, gate 11 can send a set signal to the flip-flop via gate 13 12 deliver.

The two flip-flops 12 and 22 are locked in the manner described below in such a way that one of this chain of flip-flops can only be set when the other is not set.

Gate 13 could only produce an output signal because ÇatElip-Flop 22 no output signal led.

Gate 21 only releases a set signal (for flip-flop 22) when a nke arrives and flip-flop 12 is not energized at this point in time.

The gates 13 and 21 are therefore used for the mutual locking described of the two flip-flops 12 and 22.

Further falling through is the coin that set the flip-flop 12 had caused both switching elements to confirm what was happening in the circuit no further function is effected.

When switching element 1 is left, the next signal is omitted and thus - with a short one, determined by the time of the delay stage 24 # delay - one of two reset signals sent to time stage 27 via the OR gate 25 and the delay stage 24 can be fed. Since until now flip-flop 22 could not be set, the output signal of which is the second reset signal for the time stage 27, the time stage 27 is free to trigger.

When the coin leaves switching element 2, the differentiating stage delivers 20 the trailing edge of your switching signal; this becomes immediately the time stage 27 and starts it. The output signal of this time stage can then over Line 28 led to the outside and used as desired. In the example are the three memory circuits of a 3-type coin validator are designated 281, 282 and 283, the outputs of which are led to AND gates 291, 292 and 293. The other The input of the three AND gates 291 to 293 is connected to the output line 28 of the pulse device tied together. When there is an output signal on line 28, the respective output signal can be applied Memory via its output line and the gate one from the pulse device Send "confirmed" counting pulse and derive it via a counting line (301 to 303). A differentiating stage 30 receives the output signal of the time stage 27 and leaves This is used as a reset pulse in the memory circuits of the coin validator or the like. fed via line 31. The same reset signal can can also be used to reset the flip-flop 22, although this is in the one shown Example already from the trailing edge of the signal from the switching element 2 was reset, which will be described below.

A third reset option for FliprFlop 22 can be from an internal or external iniset circuit 320, which is activated every first time the the circuit generates a pulse which forces a defined starting position. The two alternative additional reset options are described in the Example routed via ODEH member 32.

In the proper process described, flip-flop 22 came, which the switching element recognizing and evaluating irregular coin movements is not in function.

If a coin is now withdrawn at Baden, it will first become a switching element 2 actuated. This leads to the setting of flip-flop 22 with the differentiated leading edge of the signal via line 200 via gate 21. This can switch because flip-flop 12 is not set. (With reverse, correct coin movement from top to bottom the setting of the flip-flop 22 cannot be done with the leading edge of the signal, because flip-flop 12 is set beforehand and therefore gate 21 is not its condition finds.

The coin can now either be pulled up or down again be dropped.

If it is dropped, it is released when switching element 2 is left a trailing edge in differentiating stage 20, which acts as a start signal on the time stage 27 is given, but the output signal of the set flip-flop 22 blocked OR gate 25 and delay stage 24 the time stage 27. Since the delay stage acts with a time delay that is longer than the time of the start pulse Time stage 27 does not start although the flip-flop also has the same trailing edge 22 is reset: Gate 26 forwards this pulse because switch 1 does not is actuated. If the coin is dropped after pressing the SChaltelementes 2 can so time stage 27 does not generate a signal and Fäip-Flop 22 is back in the starting position.

However, if the coin continues after it has actuated switching element 2 pulled up, then switching element 1 is actuated, which leads to the leading edge this switching signal leads to the differentiating stage lo. But flip-flop 12 cannot be set because at this point in time gate 11 cannot act because switching element 2 is still actuated. (Gate 11 can therefore only work with a downward movement.) Moving the coin back and forth changes the locking function of the set flip-flop 22 nothing. Therefore, the coin can go up from both Switching elements are pulled out and then "properly dropped." There is no output signal of the time stage 27, because initially because of the still set flip-flop 22, the locked flip-flop 12 cannot be set. the Switching sequence already described above when leaving switching element 2 only has the effect that the trailing edge that occurs at the end of the switching signal is the Time stage 27 started in vain because the delay stage 24 ibn despite the simultaneously reset flip-flop 22 holds locked.

Only when another coin arrives from above, i.e. one executes the first proper run, this can also be done as described above lead to the start of timer 27 and output of an output signal.

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Claims (1)

Patent checking and counting device, at least consisting of a coin validator and an impulse device for good coins accepted by the coin validator, characterized in that the pulse device consists of a sound-detecting switch with an electric circuit and that this electrical circuit contains a switching stage, which recognizes irregular coin movements is s oll rJcrrr #e ee ße «r; 2. Münzprüf- and counting device according to claim 1, dadurcbgekennzei cbnet that the electrical circuit of the Impubsvorricbtung is connected to a Münzprüf he or a Speicberscbaltung and ibre irregular coin movements recognizing switching stage is designed to influence their functions. 3. Münzprüf- undzählvorricbtung according to claim 1 or 2, d a -d u r c h e k e k e n n n n e i c b n e t that an irregular coin movements are recognizable Switching stage of the electrical circuit is designed so that it is recognized by one irregular coin movement through all switching elements of the impulse device in the wrong direction and if the impulse device is subsequently broken through in the The electrical circuit is internally designed to influence the direction in which it is directed is that an output signal does not die out. 4. Münzprüf- undzablvorrichtung according to claim 2 or 3, d a -d u r c h g e k e n n n z e i c b n e t that the pulse device is at least three in any Having intervals internally other arranged switching elements, and that with them connected electrical circuit recognizing their correct actuation drive sequence and is designed to evaluate. 5. Münzprüf- and counting device according to claim 2 or 3, d a -d u r c h e k e k e n n n e n n e i n e t, that the impulse device is two in such close distance mutually arranged switching elements that the smallest coin to be counted this is still able to operate overlapping, and that the electrical connected to them The circuit is designed to recognize and evaluate the correct sequence of operations is. 6. Münzprüf- and counting device according to claim 4 or 5, d a -d u r c h e k e n n n z e i c h n e t that the electrical circuit of the pulse device Has differentiating stages for the signals supplied by the switching elements. 7. Münzprüf- and counting device according to one or more of the claims 1-6, that is the electrical circuit of the Pulse device is designed in such a way that it is switched on after each switch-on, as well as a defined starting position after each end of actuation of the last switching element occupies. 8. M888 testing and counting device according to one or more of the claims 1-7, that the electrical circuit of the Impulsvorricbtung is designed so that it is not completely through motion of the coin in the right direction, or more fully or incompletely Movement of the coin in the wrong direction does not emit a signal. 9. Münzprüf- and counting device according to one or more of the claims 1-8, it is not shown that the output signal of the pulse device a stored acceptance signal from an electric or electronic coin auditor releases. Lo, coin checking and counting device according to one or more of the claims 1-9, noting that the output of the pulse device is passed to a differentiating stage and this is the trailing edge of the output signal to obtain a reset signal for switching elements of the coin validator and / or the electrical circuit of the pulse device. 11. Münzprüf- undzablvorrichtung according to one or more of the claims 1-9, by noting that the basis is the electrical circuit of the Pulse device from a coin validator or a central unit a reset pulse received to terminate their output signal. 12. Pulse device according to one or more of claims 1-11, characterized in that it is connected to a coin tester for mebrere Münzsoften or to a memory circuit controlled by this for coin signals of a different type and its output signal alisnxwsr several existing memory circuits is supplied as an enable signal.