EP2966627B1 - Money box incorporating inductive sensor for determining the position of mobile elements - Google Patents

Description

The invention relates to a cash box that includes a receiving area for receiving notes of value and at least one movable element for delimiting this receiving area. A sensor for determining the position of the movable element is also provided. The movable element is in particular a side limiter or a pressure unit.

In money cassettes in which the notes of value are received as a stack of notes of value standing on their edges, the receiving area is limited by movable elements. On the one hand, a pressure unit is provided, with the help of which the notes of value accommodated in the accommodation area are pretensioned in the direction of a feed and/or removal opening. This pressure unit ensures that the notes of value in the stack of notes of value are always kept under a minimum pressure, preventing them from tipping over and ensuring safe removal and feeding. For this purpose, the pressure unit is arranged inside the cash box so that it can move in the feed direction of the notes of value and counter to the feed direction of the notes of value.

On the other hand, cash cassettes have side delimiters that move into the receiving area relative to the side walls of the cash cassette are movable in so as to adjust the width of the receiving area. In particular, these side delimiters are used to adapt the width of the receiving area to the width of the notes of value to be received.

In known money cassettes, resistive sensors are used to determine the position of the pressure unit. The stock of notes of value in the cash box can then be determined via the determined position of the pressure unit.

The positions of the side limiters can also be determined via resistive elements, so that incorrect settings can also be easily detected here.

The disadvantage of using resistive sensors is that they are susceptible to dirt. Especially with used banknotes, however, it can quickly happen that soiling occurs. In addition, such resistive sensors are prone to failure and must be replaced frequently due to the constant pressure exerted. The acquisition costs of such sensors are also relatively high and installation is complicated.

From the document DE 10 2009 006 810 A1 a cash box is known whose filling level of banknotes can be determined by means of a sensor.

The document DE 101 95 314 T5 describes the determination of the inventory of coin stores using photo sensors.

From the document DE 20 2011 051 121 U1 it is known to use an analog inductive sensor to detect coins.

Other inductive sensors are from the documents DE 698 14 924 T2 , DE 198 39 977 A1 and DE 697 25 011 T2 known.

From the document DE 10 2008 012 046 A1 a generic cash box is known in which the position of a pressure carriage can be determined via a linear potentiometer. In this case, the pressure carriage can include a button that is designed as a sliding contact that makes contact with the linear potentiometer.

From document DE 200 09 335 U1 a position measuring system is known in which a magnet is guided past a coil as a transmitter, the coil being shaped in such a way that depending The position of the encoder influences the inductance of the coil differently. The inductance of the coil is determined using an oscillator.

From document US 4,816,652A a cash box is known in which discrete positions of the pressure carriage can be determined via reed switches.

It is the object of the invention to specify a money box in which the position of movable elements within the money box can be reliably determined in a simple manner.

This object is achieved by a cash box having the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

According to the invention, the sensor comprises at least one inductive sensor, with the help of which the position of the movable

element can be determined. The use of inductive sensors has the advantage that they have a compact structure, are less susceptible to contamination, can be purchased inexpensively and are very easy to assemble. In addition, inductive sensors enable a space-saving design and a very precise determination of the position.

The movable element is in particular a side limiter for adapting the width of the receiving area to the size of the notes of value to be received. This side limiter is arranged in particular on a side wall of the housing of the cash box so that it can be adjusted relative to it.

Alternatively, the movable element can also be a pressure unit for prestressing the notes of value accommodated in the receiving area in the direction of an opening for removing and/or supplying notes of value to the cash box. This pressure unit is movable in particular in a feed direction of the notes of value and counter to this feed direction of the notes of value within the receiving area of the cash cassette and is designed in such a way that its position is changed depending on the number of notes of value received in such a way that the notes of value are always under a minimum pressure.

In a particularly preferred embodiment of the invention, several movable elements, in particular a pressure unit and two side limiters can be provided. It is both possible that a separate inductive sensor is provided for each movable element, with the help of which the position of this movable element can be determined. In particular, these sensors can each be further developed as described below. Alternatively, only one inductive sensor can be provided to determine the position of at least two movable elements.

The cash box comprises in particular a control unit which determines the level of notes of value in the cash box as a function of the position of the pressure unit. The inductive sensor thus serves as a fill level sensor, with the aid of which the number of notes of value received in the receiving area of the money cassettes can be determined very precisely.

According to the invention, the inductive sensor comprises a coil arrangement for generating an alternating magnetic field and a metallic element which can be moved relative to the alternating magnetic field, so that the metallic element influences the alternating magnetic field differently depending on the relative position between the coil arrangement and the metallic element . Furthermore, the inductive sensor has a sensor circuit that changes the alternating magnetic field, in particular the influencing of the alternating magnetic field as a function the relative position of the metallic element relative to the coil arrangement is determined. Furthermore, the sensor unit can include a control unit, in particular a microcontroller, which evaluates the change in the alternating magnetic field determined by the sensor circuit and in particular outputs it to a control unit of the cash box. Alternatively, the microcontroller can also be part of the cash box's control unit.

This achieves a particularly simple, compact design of the inductive sensor from elements that can be procured inexpensively. Nevertheless, an accurate detection of the position of the movable element is made possible.

The metallic element is designed in particular in the form of a metallic strip, as a result of which a particularly compact and simple construction is achieved.

Furthermore, the inductive sensor can include an energy supply unit, for example a battery or an accumulator. Alternatively, the inductive sensor can also be supplied with energy centrally via the energy supply of the cash box.

The coil arrangement is designed in particular in the form of a printed circuit, resulting in a particularly flat, compact structure. In addition, about such printed circuits are also made possible in a simple manner with more complex coil shapes. The coil arrangement can include both exclusively one and multiple coils.

The transmitter circuit is designed in particular in the form of an integrated circuit, so that this is also designed in a particularly simple and space-saving manner. The sensor circuit is connected to the coil of the coil arrangement in particular via a cable. In particular, the microcontroller is arranged on the same circuit board as the integrated circuit. Alternatively, the microcontroller can also be attached to another component of the cash box. Instead of a microcontroller, microprocessors, CPLDs, DSPs, PSOCs, memory-based state machines and/or a preconfigured sensor system without a microcontroller can also be used as the control unit.

In the case of the invention, the inductive sensor comprises at least one further coil arrangement for generating a further alternating magnetic field. The accuracy of the inductive sensor can be further increased by providing two coil arrangements. In particular, a differential measurement can be achieved in this way. For example, manufacturing tolerances and/or changes in the distance between the metallic element and the coil arrangement can be determined and taken into account accordingly in the evaluation.

In a particularly preferred embodiment, the metallic element is arranged on the movable element. The coil arrangement is then arranged stationary relative to the housing of the cash box and in particular arranged such that the metallic element is moved past the coil arrangement in the direction of movement of the movable element when the movable element is moved together with this movable element.

The metallic element is designed in particular as a metal strip and is arranged on the side of the movable element that faces the cassette base of the cash cassette. The metal element thus takes up very little installation space and can be attached from below in a simple manner to existing movable elements, for example side limiters or pressure units.

The coil arrangement is designed in particular as a plate which extends in the direction of movement of the movable element and is arranged on the cassette base in such a way that the metallic element is moved a predetermined distance over the coil arrangement when the movable element is moved. Depending on the position of the metallic element, this influences the alternating magnetic field generated by the coil arrangement in different ways, so that the position of the metallic element and thus the position of the movable element can be determined in a simple manner. The coil or the For this purpose, the coil arrangement is designed in particular in such a way that the alternating magnetic field it generates, viewed in the direction of movement of the movable element, is designed differently at least within the adjustment range of the movable element at each position, so that depending on the position of the metallic element, this influences the inductive sensor differently he follows. The adjustment range is understood to mean in particular that range within which the movable element can be adjusted as planned.

In particular, the coil arrangement comprises a plurality of coils connected in series, these coils being arranged one behind the other in the direction of movement of the movable element. The coils here have different numbers of turns, so that the metallic element, depending on which of these coils is arranged above, has a different influence on the alternating magnetic field generated by the coil arrangement. This influence can easily be determined by the inductive sensor.

In an alternative embodiment of the invention, the coil arrangement can also include only one coil, which is designed in such a way that the distance between its turns changes in the direction of movement of the movable element, so that in turn, depending on the position of the metallic element relative to the coil arrangement, this The alternating magnetic field generated by the coil arrangement is influenced differently.

In an alternative embodiment of the invention, the coil arrangement can also be arranged on the movable element and accordingly the metal element can be arranged stationary relative to the housing of the money cassette. In this case, the metallic element is arranged in such a way that the coil arrangement is transported together with the movable element past the metallic element in the direction of movement when the movable element is moved.

In this case, the coil arrangement is preferably also designed in the form of a printed circuit board. In particular, a simple conventional coil can be used in this case. It is not necessary for several coils to be connected in series, and it is also not necessary to use a complex coil with varying winding distances. The coil arrangement is arranged in particular on the side of the movable element which faces the cassette base.

Alternatively, a foil print can be used instead of a printed circuit board.

In this embodiment, the metal element is designed as a plate with a metal strip, which plate extends in the direction of movement of the movable element. Alternatively, a metal strip without a circuit board can also be used. The metal strip is arranged on the cassette bottom in such a way that the coil assembly when moving of the movable element is moved a predetermined distance over the metal strip.

The width of the metal strip, viewed in the direction of movement of the movable element, differs depending on the position at least within the adjustment range of the movable element. The metallic strip in turn influences the alternating magnetic field generated by the coil arrangement differently depending on the relative position of the coil arrangement and thus the relative position of the movable element to the metallic strip, so that the position of the movable element can be determined easily and precisely.

The metal strip is in particular triangular in shape, so that the width changes continuously and uniformly as seen in the direction of movement and the position of the movable element can thus be determined in a particularly simple manner.

In a particularly preferred embodiment, it is also possible to determine the position of various movable elements, for example the position of side limiters and a pressure unit, with just one inductive sensor by designing the geometry of the coil arrangement appropriately and/or by providing a plurality of coil arrangements. This achieves a particularly simple and compact structure.

Further features and advantages of the invention result from the following description, which explains the invention in more detail using exemplary embodiments in connection with the attached figures.

Figur 1

eine schematische, perspektive Darstellung einer Geldkassette gemäß einer ersten Ausführungsform;

Figur 2

eine schematische Darstellung eines induktiven Sensors;

Figur 3

eine schematische Darstellung eines Ausschnitts eines induktiven Sensors gemäß einer ersten Ausführungsform;

Figur 4

eine schematische Darstellung eines Ausschnitts eines induktiven Sensors gemäß einer zweiten Ausführungsform;

Figur 5

eine schematische Darstellung eines Ausschnitts eines induktiven Sensors gemäß einer dritten Ausführungsform;

Figur 6

eine schematische, perspektivische Darstellung eines Ausschnitts einer Geldkassette gemäß einer zweiten Ausführungsform;

Figur 7

eine schematische Darstellung eines Ausschnitts eines induktiven Sensors gemäß einer vierten Ausführungsform; und

Figur 8

eine schematische Darstellung eines Ausschnitts eines induktiven Sensors gemäß einer fünften Ausführungsform.

Show it:

figure 1

a schematic perspective view of a cash box according to a first embodiment;

figure 2

a schematic representation of an inductive sensor;

figure 3

a schematic representation of a section of an inductive sensor according to a first embodiment;

figure 4

a schematic representation of a section of an inductive sensor according to a second embodiment;

figure 5

a schematic representation of a section of an inductive sensor according to a third embodiment;

figure 6

a schematic perspective view of a section of a cash box according to a second embodiment;

figure 7

a schematic representation of a section of an inductive sensor according to a fourth embodiment; and

figure 8

a schematic representation of a section of an inductive sensor according to a fifth embodiment.

In figure 1 a schematic, perspective view of a cash box 10 is shown according to a first embodiment. The cash box 10 has a housing 12 from which figure 1 A cover is hidden to make the internal elements visible.

The cassette 10 has a receiving area 14 in which the notes of value to be received are received in the form of a stack of notes of value.

The cash box 10 has an opening 16 through which the notes of value can be fed to the receiving area 14 by machine. In the receiving area 14 there is a pressure unit 18 which can be moved in the direction of the double arrow P1. The notes of value received as a stack of notes of value are pretensioned in the direction of the opening 16 with the aid of the pressure unit 18 so that the notes of value cannot tip over.

The pressure unit 18 thus moves continuously in the direction of the double arrow P1 depending on the number of notes of value received. The position of the pressure unit 18 is therefore dependent on the stock of notes of value in the cash box 10 . The position of the pressure unit 18 can therefore also be used to determine the stock of notes of value in the cash box 10 in a particularly simple manner. For this purpose, the cash box 10 has an inductive sensor 100, with the help of which the position of the pressure unit 18 can be reliably determined in a simple manner. The use of inductive sensors has the advantage that they are compact, less susceptible to contamination and easy to install.

In figure 2 is a schematic representation of an inductive sensor 100 shown, this schematic general structure both for the inductive sensor 100 of the cash box figure 1 as well as for the other inductive sensors described below.

The inductive sensor 100 has a coil arrangement 110 via which an alternating magnetic field is generated. Furthermore, the inductive sensor 100 has a conductive element 112 which is arranged in a variable position relative to the coil arrangement 110 . Depending on the position of the conductive element 112 relative to the coil arrangement 110, it influences the alternating magnetic field differently. This change is detected by a sensor circuit 114 of the inductive sensor 100 and evaluated with the aid of a control unit 116 of the inductive sensor 100 .

In addition, the inductive sensor can include an energy supply unit 118, for example a battery or an accumulator.

The conductive element 112 is designed in particular as a conductive strip, preferably a metallic strip. The coil arrangement 110 can include both one and multiple coils, and is designed in particular as a printed circuit board with a correspondingly printed coil.

Both have the advantage that the elements are very compact and simple. In addition, complex coil shapes can also be realized in a simple manner with such circuit boards.

The sensor circuit 114 is in particular in the form of an integrated circuit. The control unit 116 is preferably a microcontroller located on the same circuit board as the sensor circuit 114 integrated circuit. Overall, this results in a particularly compact inductive sensor 100, which is therefore often also referred to as an inductive miniature sensor. Thus, the inductive sensor 100 takes up little space in the cash cassette 10 and can also be integrated into known cash cassettes 10 as a retrofit solution without structural changes.

At the in figure 1 In the embodiment shown, the inductive sensor 100 has a non-visible conductive strip which is arranged on the side of the pressure unit 18 which faces the base 20 of the money cassette 10 .

The coil arrangement 110 is designed as a circuit board, which extends in the direction of movement P1 of the pressing unit 18 over the entire width of the receiving area. In an alternative embodiment, the coil assembly 110 may not extend across the entire width. The coil arrangement 110 is designed in such a way that the conductive element 112 influences the alternating magnetic field generated by the coil arrangement 110 differently depending on its position and thus depending on the position of the pressure unit 18 relative to the coil arrangement 110, with this influence then being detected via the sensor circuit 114 and is recognized by the microcontroller 116 and depending on the determined change the position of the pressing unit 18 is determined. For this purpose, the coil arrangement 110 is designed in such a way that the alternating magnetic field generated with it differs as a function of the position as seen in the direction of movement P1, so that the conductive element 112 influences the alternating magnetic field differently accordingly.

In figure 3 is a section of an inductive sensor 100 according to the cash box 10 and figure 1 uses a first embodiment, in which the coil arrangement 110 comprises only a single coil 120, which is designed in such a way that the dependence of the position in relation to the direction of movement P1 varies the distance between the turns and thus the number of turns in the region of the conductive element 112.

bestimmt, wobei

• N die Windungsanzahl,
• Φ der magnetische Fluss und
• I der Strom, der die Spule durchströmt, ist.

The inductance of an air coil is given by the formula $$L=\frac{\mathit{N}\cdot \mathrm{\Phi }}{\mathit{I}}$$

determined where

• N is the number of turns,
• Φ the magnetic flux and
• I is the current flowing through the coil.

When determining the position with a stationary coil arrangement 110 and a movable conductive element 112, the change in inductance as a function of the number of turns of the coil in the area of the electrically conductive element 112 is utilized. As in figure 3 is clearly visible, the electrically conductive element 112 "covers" a different number of turns of the coil 120 depending on its position and thus influences the magnetic field differently accordingly.

In addition, other possible coil shapes are also possible as an alternative. In particular, other switching relationships between a plurality of coils with different inductances can also be used in order to determine the position of the conductive element 112 .

In figure 4 a section of an inductive sensor 102 according to a second embodiment is shown, which can also be used as an alternative to the coil circuit 110 according to the first embodiment with a movable conductive element and a stationary coil arrangement 110 . The inductive sensor 102 according to the second embodiment differs from the inductive sensor 100 according to the first embodiment in that the coil arrangement 110 comprises four coils 122 to 128 which are arranged one behind the other and connected in series as viewed in the direction of movement P1. The coils 122 to 128 have a different number of turns, so that also in this case, in turn, the position of the electrically conductive element 112 relative to the coil arrangement 110 can be easily determined by the inductive sensor 102 .

In both embodiments, the pressure unit 18 is moved through the receiving area 14 of the cash cassette 10 in the direction of the double arrow P1 during operation of the cash cassette. In this case, the conductive strip 112 arranged on the underside of the pressing unit 18 is moved to a predetermined distance via the coil arrangement 110 . The resolution and accuracy of the position determination can be determined by the specific construction of the coil arrangement 110 and the size and material of the conductive strip 112 . The accuracy of such an inductive sensor 110 is so high that the distance between the coil arrangement 110 and the conductive strip 112 can be several millimeters. In the event that the pressure unit 18 is at different distances from the coil arrangement 110 during the movement or at one position, for example due to manufacturing tolerances and wear, the measuring method can be expanded by means of additional inductive sensors. The measurement can then be carried out differentially, as a result of which the corresponding interference is filtered out.

In figure 5 1 is a schematic representation of a section of an inductive sensor 104 according to a third specific embodiment. In this third embodiment, the coil arrangement 110 is fixedly arranged on the pressing unit 18 . Instead of the coil unit 110 is a conductive strip 112 is arranged on the bottom 20 of the cash box, which has a triangular shape, so that the width of the conductive strip 112 changes as seen in the direction of movement P1. In particular, the conductive strip 112 can be formed as a copper layer on a printed circuit board.

Depending on the position of the coil arrangement 110 relative to the conductive strip 112, this influences the alternating field generated by the coil arrangement 110 differently over a varying width, so that a position determination is again possible via this.

In figure 6 1 is a schematic, perspective view of a money box 30 according to a second embodiment, with many elements of the money box 30 not being shown. The cash box 30 has two side limiters 32, 34, with the help of which the width of the receiving area 14 can be adjusted and in particular adapted to the width of the notes of value to be received. Accordingly, the side limiters 32, 34 are movably arranged in the direction of the double arrow P2. In this specific embodiment, two inductive sensors 106 are provided, with the sensors 106 being designed analogously to the inductive sensor 100 according to the first specific embodiment. The inductive sensors 102 each have a non-visible conductive strip on the underside of the respective side limiter 32, 34 which is moved with the side limiters 32, 34 relative to a coil assembly 110. About not shown sensor circuits 114 can turn the position of the side delimiters 32, 34 can easily be determined.

In an alternative embodiment of the invention, sensors according to the in conjunction with figure 4 described second embodiment or inductive sensors 104 according to in conjunction with figure 5 described third embodiment can be used.

In a further alternative embodiment of the invention, the cash box can also have both a pressure unit 18 and side limiters 32, 34, the position of which can be determined via an inductive sensor 100 to 106 in each case. In a further alternative embodiment, the positions of a plurality of movable elements 18, 32, 34 can also be determined via an inductive sensor by using a plurality of coil arrangements 110 of correspondingly complex design.

In addition, the position of other movable elements of cash cassettes 10 can also be determined with the aid of the inductive sensors 100 to 106 described.

In figure 7 1 is a schematic representation of a section of inductive sensor 108 according to a fourth specific embodiment. The inductive sensor 108 has two coil arrangements 110, 130 which are rotated by 180° are arranged to each other and over which the conductive strip 112 is moved together. The use of two separate coil arrangements 110, 130 enables a differential measurement, which allows manufacturing tolerances to be compensated for and thus achieves an even more precise measurement result. In an alternative embodiment, two or more than two conductive strips 112 can also be used.

In figure 8 shows a schematic representation of a section of an inductive sensor 109 according to a fifth embodiment, with this fifth embodiment providing two coil arrangements 110, 130 which are arranged on the movable elements 18, 32, 34 and relative to two conductive strips 112, 132 be moved. These two strips 112, 132 are each triangular, but are arranged rotated by 180° with respect to one another. As a result, a differential measurement is again possible, which delivers high accuracy even with manufacturing tolerances.

The inductive sensors 108, 109 according to Figures 7 and 8 can alternatively to the other inductive sensors 100 to 106 in the cash cassettes 10, 30 according to figures 1 and 6 be used.

Reference List

10, 30

cash box

12

Housing

14

recording area

16

opening

18

pressure unit

20

floor

32, 34

page delimiter

100, 102, 104, 106, 108, 109

inductive sensor

110, 130

coil arrangement

112, 132

conductive strip

114

sensor circuit

116

control unit

118

power supply unit

120 to 128

Kitchen sink

P1, P2

direction of movement

Claims (15)

1. Money box,

   with a receiving region (14) for receiving notes of value,

   with at least one movable element (18, 32, 34) for delimiting the receiving region (14), and

   with a sensor (100 to 109) for determining the position of the movable element (18, 32, 34),

   characterized in that the sensor (100 to 109) has at least one inductive sensor,

   in that the inductive sensor (100 to 109) comprises a coil arrangement (110, 130) for generating an alternating magnetic field and a conductive element (112, 132) for influencing the alternating magnetic field in a position-dependent manner, and

   in that the inductive sensor (100 to 109) comprises at least one further coil arrangement (110, 130) for generating a further alternating magnetic field.
2. Money box (10, 30) according to Claim 1, characterized in that the movable element (18, 32, 34) is a side delimiter (32, 34) for adapting the width of the receiving region (14) to the size of the notes of value to be received.
3. Money box (10, 30) according to Claim 1, characterized in that the movable element (18, 32, 34) is a pressure-exerting unit (18) for preloading the notes of value received in the receiving region (14) in the direction of an opening (16) for removing and/or feeding in notes of value.
4. Money box (10, 30) according to Claim 3, characterized in that a control unit which determines the filling level of the money box (10, 30) with notes of value on the basis of the position of the pressure-exerting unit (18) is provided.
5. Money box (10, 30) according to one of the preceding claims, characterized in that the coil arrangement (110, 130) takes the form of a printed circuit.
6. Money box (10, 30) according to one of the preceding claims, characterized in that the sensor circuit (114) takes the form of an integrated circuit.
7. Money box (10, 30) according to one of the preceding claims, characterized in that the conductive element (112, 132) is arranged on the movable element (18, 32, 34), and in that the coil arrangement (110, 130) is arranged fixed in place in relation to the housing (12) of the money box (10, 30) and in such a way that, when the movable element (18, 32, 34) moves, the conductive element (112) is moved past the coil arrangement (110, 130) .
8. Money box (10, 30) according to Claim 7, characterized in that a metal strip on the side of the movable element (18, 32, 34) that is facing the box floor (20) is arranged as the conductive element (112, 132), and in that the coil arrangement (110, 130) is formed as a circuit board which extends in the direction of movement (P1, P2) of the movable element (18, 32, 34) and is arranged on the box floor (20) in such a way that, when the movable element (18, 32, 34) moves, the metal strip (112, 132) is moved over the coil arrangement (110, 130) at a predetermined distance.
9. Money box (10, 30) according to Claim 7 or 8, characterized in that the coil arrangement (110, 130) is formed in such a way that, seen in the direction of movement (P1, O2) of the movable element (18, 32, 34), the alternating magnetic field generated by it is location-dependently varying, at least within the adjusting region of the movable element (18, 32, 34).
10. Money box (10, 30) according to one of Claims 7 to 9, characterized in that the coil arrangement (110, 130) comprises a number of coils (122 to 128) arranged in series one behind the other in the direction of movement (P1, P2) of the movable element (18, 32, 34), the coils (122 to 128) having varying numbers of turns.
11. Money box (10, 30) according to one of Claims 7 to 9, characterized in that the coil arrangement (110, 130) comprises at least one, preferably exactly one, coil (120), in the case of which the distance of the turns from one another is varying, seen in the direction of movement (P1, P2) of the movable element (18, 32, 34).
12. Money box (10, 30) according to one of Claims 1 to 6, characterized in that the coil arrangement (110, 130) is arranged on the movable element (18, 32, 34), and in that the conductive element (112, 132) is arranged fixed in place in relation to a housing (12) of the money box (10, 30) and in such a way that, when the movable element (18, 32, 34) moves, the coil arrangement (110, 130) is moved past the conductive element (112, 132).
13. Money box (10, 30) according to Claim 12, characterized in that the coil arrangement (110, 130), in particular in the form of a printed circuit board, a printed membrane or a stamped metal part, is arranged on the side of the movable element (18, 32, 34) that is facing the box floor (20), and in that the conductive element (112, 132) is formed as a circuit board which extends in the direction of movement (P1, P2) of the movable element (18, 32, 34) and has a metal strip which is arranged on the box floor (20) in such a way that, when the movable element (18, 32, 34) moves, the coil arrangement (110, 130) is moved over the metal strip (112, 132) at a predetermined distance.
14. Money box (10, 30) according to Claim 13, characterized in that, seen in the direction of movement (P1, P2) of the movable element (18, 32, 34), the width of the metal strip (112, 132) is location-dependently varying, at least within the adjusting region of the movable element (18, 32, 34).
15. Money box (10, 30) according to Claim 13 or 14, characterized in that the metal strip (112, 132) is triangularly shaped.

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