JP2011060087A - Coin identification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coin identification device capable of identifying a coin by sufficiently high resolution while allowing the change in relative positional relationship between the coin and an outer diameter detecting magnetic sensor due to the deposition of dust or the like. <P>SOLUTION: The coin identification device includes: a material quality detection unit 311 for detecting the material quality of a coin C by detecting a magnetic field change corresponding to the material quality of the coin C by a material quality detecting magnetic sensor 11; a material thickness detection unit 313 for detecting the thickness and surface ruggedness of the coin C by detecting a magnetic field change corresponding to the thickness and surface ruggedness of the coin C by a material thickness detecting magnetic sensor 12; and an outer diameter detection unit 312 for detecting the outer diameter of the coin C by detecting a magnetic field change corresponding to the outer diameter of the coin C by an outer diameter detecting magnetic sensor 13. The outer diameter detection unit 312 detects the outer diameter of the coin C by an output signal of the magnetic field change detected by the outer diameter detecting magnetic sensor 13 when an output of the magnetic field change detected by at least either one of the material quality detecting magnetic sensor 11 and the material thickness detecting magnetic sensor 12 is a predetermined value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a coin discriminating apparatus, and more particularly to a coin discriminating apparatus that discriminates coins that are inserted and that pass through a coin passage.

  2. Description of the Related Art Conventionally, a coin discriminating apparatus that includes a magnetic detection unit arranged in the vicinity of a coin passage through which inserted coins pass and that identifies coins passing through the coin passage through the magnetic detection unit is known as follows. ing.

  For example, an outer diameter detection magnetic sensor and a material detection magnetic sensor as a magnetic detection unit are sequentially arranged in the vicinity of the coin passage along the coin passing direction. The outer diameter detection magnetic sensor is for detecting the outer diameter of the coin passing through the coin passage, and its width is sufficiently larger than the outer diameter of all the coins that may pass through the coin passage. It is. The material detection magnetic sensor detects the material of the coin passing through the coin passage.

  In the coin discriminating apparatus having such a magnetic detection unit, it is sufficiently larger than the coin diameter (maximum diameter) of all the coins that can pass through the width of the outer diameter detection magnetic sensor. It is possible to detect the outer diameter of the coin satisfactorily by allowing a change in the relative positional relationship between the coin and the outer diameter detection magnetic sensor caused by the dust or the like (for example, see Patent Document 1).

Special table 2001-513232 gazette

  However, in the coin discriminating apparatus proposed in Patent Document 1 described above, the width of the outer diameter detection magnetic sensor is made sufficiently larger than all the coins that can pass through, and the coin diameter (maximum diameter) of the passing coins is increased. ), The change rate of each coin is small and the resolution (sensitivity) cannot be said to be sufficiently high.

  In view of the above circumstances, the present invention allows a coin to be identified with sufficiently high resolution while allowing a change in the relative positional relationship between the coin and the outer diameter detection magnetic sensor due to accumulation of dust or the like. An object is to provide an identification device.

  In order to achieve the above object, in the coin identification device according to claim 1 of the present invention, the material detection magnetic sensor arranged in the vicinity of the coin passage through which the inserted coin passes corresponds to the material of the coin passing through. The material detection means for detecting the material of the coin by detecting a change in the magnetic field, and the material thickness detection magnetic sensor arranged in the vicinity of the coin passage, change the magnetic field according to the thickness of the passing coin and the surface roughness. The material thickness detecting means for detecting the thickness of the coin and the unevenness of the surface thereof, and the outer diameter detecting magnetic sensor arranged in the vicinity of the coin passage change the magnetic field according to the outer diameter of the passing coin. A coin discriminating apparatus for discriminating a coin passing through the coin passage, wherein the outer diameter detecting means is the material detection magnetic sensor. And said Thickness detector least an output of said magnetic field variation that one senses the magnetic sensor, and detects the outer diameter of the coin when a predetermined value.

  According to a second aspect of the present invention, there is provided the coin discriminating apparatus according to the first aspect, wherein the outer diameter detecting means is ½ of an output value that maximizes the magnetic field change detected by the material detecting magnetic sensor. In this case, the outer diameter of the coin is detected by the output signal of the magnetic field change detected by the outer diameter detecting magnetic sensor.

  According to a third aspect of the present invention, there is provided the coin identification device according to the first or second aspect, wherein the outer diameter detection coil constituting the outer diameter detection magnetic sensor is a material detection that constitutes the material detection magnetic sensor. A material thickness detection coil that is disposed in the vicinity of the coin passage downstream of the coil in the passage direction of the coin and that constitutes the material thickness detection magnetic sensor is formed of the material detection coil and the outer diameter detection coil. It is arranged in the vicinity of the coin passage between.

  According to a fourth aspect of the present invention, there is provided the coin discriminating apparatus according to the first or second aspect, wherein the outer diameter detection coils constituting the outer diameter detection magnetic sensor are separated from each other on the inner surfaces facing each other. A material thickness detection coil which is wound endlessly and which constitutes the material thickness detection magnetic sensor is arranged inside the outer diameter detection coil.

  According to a fifth aspect of the present invention, there is provided the coin discriminating apparatus according to the first or second aspect, wherein the outer diameter detection coils constituting the outer diameter detection magnetic sensor are separated from each other on the inner surfaces facing each other. A material detection coil that is wound endlessly and that constitutes the material detection magnetic sensor, and a material thickness detection coil that constitutes the material thickness detection magnetic sensor, are disposed inside the outer diameter detection coil. Features.

  According to the coin identifying device of the present invention, the outer diameter detecting means is an outer diameter detecting magnetic sensor when the output of the magnetic field change detected by at least one of the material detecting magnetic sensor and the material thickness detecting magnetic sensor becomes a predetermined value. Since the outer diameter of the coin is detected by the output signal of the magnetic field change to be detected, the rate of change for each coin is increased regardless of the characteristics of the material detection magnetic sensor, and the resolution (sensitivity) is sufficiently high. Can do. In addition, even when coins passing through the coin passage jump up from the coin passage due to the influence of dust or the like accumulated in the coin passage, the area where the coin overlaps with the material detection magnetic sensor and the outer diameter detection magnetic sensor hardly changes. Therefore, it is possible to allow a change in the relative positional relationship between the coin and the outer diameter detection magnetic sensor due to accumulation of dust or the like. Therefore, it is possible to identify the coin with sufficiently high resolution while allowing a change in the relative positional relationship between the coin and the outer diameter detection magnetic sensor due to accumulation of dust or the like.

FIG. 1 is a schematic diagram schematically showing a circuit configuration of a main part of a coin identification device according to an embodiment of the present invention. FIG. 2 is a schematic diagram schematically showing the arrangement and configuration of the magnetic detection unit shown in FIG. FIG. 3 is an explanatory diagram showing a case where the arrangement and configuration of the magnetic detection unit shown in FIG. 2 are viewed from the A direction. FIG. 4 is a perspective view showing the arrangement and configuration of the magnetic detection unit shown in FIG. FIG. 5 is a schematic diagram schematically showing a positional relationship between a coin passing through the coin passage and each magnetic sensor of the magnetic detection unit. FIG. 6 is a perspective view schematically showing a positional relationship between a coin passing through the coin passage and each magnetic sensor of the magnetic detection unit. FIG. 7 shows the output of the material detection magnetic sensor and the output of the outer diameter detection magnetic sensor. (A) is a chart showing the output voltage of the material detection magnetic sensor, and (b) is the outer diameter detection magnetic sensor. It is a chart which shows the output voltage. FIG. 8 is a schematic diagram schematically showing a modification of the material detection magnetic sensor constituting the coin identification device according to the embodiment of the present invention. 9 shows the configuration of the composite material coin shown in FIG. 8, wherein (a) is a transverse sectional view and (b) is a longitudinal sectional view. FIG. 10 is a schematic diagram schematically showing the arrangement and configuration of the magnetic detection units in a modified example of the coin identifying device of the present invention. 11 is a cross-sectional view taken along line FF in FIG. FIG. 12 is a schematic diagram schematically showing a positional relationship between a coin passing through the coin passage and each magnetic sensor of the magnetic detection unit. FIG. 13 is a schematic diagram schematically showing the arrangement and configuration of a magnetic detection unit in a modification of the coin identifying device of the present invention. 14 is a cross-sectional view taken along line HH in FIG. FIG. 15 is a schematic diagram schematically showing a positional relationship between a coin passing through the coin passage and each magnetic sensor of the magnetic detection unit. FIG. 16 is a schematic diagram schematically showing the arrangement and configuration of the magnetic detection units in a modified example of the coin identifying device of the present invention.

  Exemplary embodiments of a coin identifying device according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram schematically showing a circuit configuration of a main part of a coin identification device according to an embodiment of the present invention. The coin identification device exemplified here includes the magnetic detection unit 10 and the control unit 30.

  As shown in FIGS. 2 and 3, the magnetic detection unit 10 is disposed in the vicinity of the coin passage 1 through which a coin C inserted from an insertion port (not shown) passes, and includes a material detection magnetic sensor 11 and a material thickness detection. A magnetic sensor 12 and an outer diameter detection magnetic sensor 13 are provided. As shown in FIG. 3, the material detection magnetic sensor 11, the material thickness detection magnetic sensor 12, and the outer diameter detection magnetic sensor 13 are each a pair of magnetic sensors that are opposed to each other with the coin path 1 interposed therebetween. However, since the configuration of the magnetic sensor arranged oppositely has the same configuration as each of the material detection magnetic sensor 11, the material thickness detection magnetic sensor 12, and the outer diameter detection magnetic sensor 13, in this embodiment, The description of these opposingly arranged magnetic sensors is omitted, and only the material detection magnetic sensor 11, the material thickness detection magnetic sensor 12, and the outer diameter detection magnetic sensor 13 arranged on one side of the coin path 1 are also shown in FIG. Show. Further, reference numerals 2 and 3 in FIG. 3 are side walls of the coin passage 1.

  In such a magnetic detection unit 10, the material detection magnetic sensor 11, the material thickness detection magnetic sensor 12, and the outer diameter detection magnetic sensor 13 are arranged in this order from the upstream side along the passing direction of the coin C.

  The material detection magnetic sensor 11 includes a material detection coil 111. As shown in FIG. 4, the material detection coil 111 is disposed by being wound around the rod portion 112 a of the core 112 in an annular shape. The core 112 is formed by laminating a single piece or a plurality of plate-shaped pieces obtained by shearing permalloy, a silicon steel plate, iron or the like, or by sintering ferrite or the like.

  The material detection coil 111 generates a magnetic field (for example, about 20 kHz) in the coin passage 1 in accordance with the oscillation frequency given from the oscillation circuit 21a, and detects a change in the magnetic field when the coin C passes through the coin passage 1. Is. The change in impedance due to the passage of the coin C through the coin passage 1 by the material detection coil 111 is amplified by the material detection coil detection circuit 22 and output as an analog signal, and the signal is digitally transmitted through the AD converter 25. It is converted into a signal and given to the control unit 30.

  The material thickness detection magnetic sensor 12 includes a material thickness detection coil 121. As shown in FIG. 4, the material thickness detection coil 121 is wound around a rod portion 122 a formed on a U-shaped core 122. The core 122 is formed by laminating a single piece or a plurality of plate-like pieces obtained by shearing permalloy, a silicon steel plate, iron or the like, or by sintering ferrite or the like.

  The material thickness detection coil 121 generates a magnetic field (for example, about 120 to 140 kHz) in the coin passage 1 according to the oscillation frequency given from the oscillation circuit 21b, and changes in the magnetic field when the coin C passes through the coin passage 1. Is detected. The change in impedance due to the passage of the coin C through the coin path 1 by the material thickness detection coil 121 is amplified by the material thickness detection coil detection circuit 24 and output as an analog signal. Is converted into a digital signal and provided to the control unit 30.

  The outer diameter detection magnetic sensor 13 includes an outer diameter detection coil 131. As shown in FIG. 4, the outer diameter detection coil 131 is wound around the rod portion 132 a of the core 132. More specifically, it is wound and arranged in a ring shape in such a manner that the direction perpendicular to the extending direction of the coin passage 1 is the longitudinal direction. The maximum diameter of the outer diameter detection coil 131 is adjusted to be larger than the outer diameter of all coins C passing through the coin passage 1.

  The core 132 is formed by laminating a single piece or a plurality of plate-shaped pieces obtained by shearing permalloy, a silicon steel plate, iron, or the like, or by sintering ferrite or the like.

  Such an outer diameter detection coil 131 generates a magnetic field (for example, about 20 kHz) in the coin passage 1 according to the oscillation frequency given from the oscillation circuit 21a, and changes in the magnetic field when the coin C passes through the coin passage 1. Is detected. The change in impedance caused by the passage of the coin C through the coin path 1 by the outer diameter detection coil 131 is amplified by the outer diameter detection coil detection circuit 23 and output as an analog signal. Is converted into a digital signal and provided to the control unit 30.

  In the coin identification device according to the present embodiment, the positional relationship between the material detection magnetic sensor 11 and the outer diameter detection magnetic sensor 13 is defined as follows.

  As shown in FIG. 2, all the coins C in which the linear distance L from the center of the material detection magnetic sensor 11 to the outer diameter detection magnetic sensor 13 may pass through the coin passage 1 as shown in FIGS. Is defined as a size smaller than the outer diameter of the coin C having the smallest outer diameter, specifically, a size of less than 20 mm. As a result, as shown in FIGS. 5 and 6, all the coins C that may pass through the coin path 1, that is, 1 yen coin, 5 yen coin, 50 yen coin, 100 yen coin, 10 yen coin, and 500 yen When any of the coins passes through the coin path 1, there is always a timing for overlapping the material detection magnetic sensor 11 and the outer diameter detection magnetic sensor 13 at the same time. As described above, since the material thickness detection magnetic sensor 12 is disposed between the material detection magnetic sensor 11 and the outer diameter detection magnetic sensor 13, the material thickness detection magnetic sensor 12 is different from the material detection magnetic sensor 11 and the outer diameter detection magnetic sensor 13. Needless to say, when the coins C passing through are simultaneously overlapped, the material thickness detection magnetic sensor 12 is also overlapped at the same time.

  In the coin discriminating apparatus according to the present embodiment, the positional relationship between the material detection magnetic sensor 11 and the outer diameter detection magnetic sensor 13 is such that the coin C passing through the coin passage 1 is detected by the material detection magnetic sensor 11 and the outer diameter detection. At the timing of overlapping with the magnetic sensor 13 at the same time, as shown in FIGS. 7A and 7B, the output value of the magnetic field change detected by the material detection magnetic sensor 11 is ½ of the maximum output voltage value B (B / 2), the output value of the magnetic field change detected by the outer diameter detection magnetic sensor 13 is defined to be the maximum value D.

  The control unit 30 is, for example, a CPU, and performs various calculations and determinations based on programs and data stored in advance in a memory (not shown). As a characteristic component in the present embodiment, a detection unit 31 and the determination part 32 are comprised.

  The detection unit 31 detects four elements of the coin C passing through the coin passage 1, and includes a material detection unit 311, an outer diameter detection unit 312, and a material thickness detection unit 313.

  The material detection unit 311 is a material detection unit that detects the material of the coin C. The material detection unit 311 receives the digitally converted signal given from the material detection coil detection circuit 22, compares the input signal with a material threshold value stored in advance in a memory or the like, and calculates the coin. C is equivalent to “brass” which is the material of 50 yen coins and 100 yen coins, is equivalent to “nickel brass” which is the material of 500 yen coins, or “bronze” which is the material of 10 yen coins This is to detect whether it is equivalent to, “corresponding to“ aluminum ”which is the material of 1-yen coin” or “copper-zinc” which is the material of 5-yen coin. .

  The outer diameter detector 312 is an outer diameter detector that detects the outer diameter of the coin C. The outer diameter detection unit 312 inputs a digitally converted signal given from the outer diameter detection coil detection circuit 23, and compares the input signal with an outer diameter threshold value stored in advance in a memory or the like. The coin C detects whether the outer diameter of the coin C corresponds to a size of 1 yen coin, 5 yen coin, 50 yen coin, 100 yen coin, 10 yen coin, or 500 yen coin.

  The material thickness detection unit 313 is a material thickness detection unit that detects the thickness (plate thickness) of the coin C and the unevenness of the surface. The material thickness detection unit 313 inputs the digitally converted signal given from the material thickness detection coil detection circuit 24, and compares the input signal with a material thickness threshold value recorded in advance in a memory or the like. , Detecting whether the thickness of the coin C corresponds to the size of 1-yen coin, 5-yen coin, 50-yen coin, 100-yen coin, 10-yen coin, 500-yen coin, It detects unevenness.

  The determination part 32 inputs each detection result by the detection part 31, and determines the classification and authenticity of the coin C. Although a specific determination method will not be described in detail here, the determination unit 32 determines the size corresponding to the outer diameter of the 50 yen coin by the outer diameter detection unit 312 when the coin C passes through the coin passage 1. It is detected by the material detection unit 311 as being equivalent to white copper, detected by the material thickness detection unit 313 as being equivalent to the thickness of a 50 yen coin, and further detected by the material thickness detection unit 313 as a 50 yen coin. If the corresponding surface irregularities are detected, it is determined that the coin C is a 50 yen coin. On the other hand, if any one of the four detection elements is detected not corresponding to a 50 yen coin, the coin C is determined to be false.

  When the determination and the determination of authenticity are made by the determination unit 32, the control unit 30 drives a coin C sorting solenoid and a coin C counter (not shown) to return the coin C determined to be false, and is identified as true. The coin C is stored.

  In the coin discriminating apparatus according to the present embodiment as described above, the linear distance L from the center of the material detection magnetic sensor 11 to the outer diameter detection magnetic sensor 13 may pass through the coin path 1. The coin C that is smaller than the outer diameter of the coin C having the smallest outer diameter among the coins C and that passes through the coin passage 1 simultaneously overlaps the material detection magnetic sensor 11 and the outer diameter detection magnetic sensor 13. When the output value of the magnetic field change detected by the material detection magnetic sensor 11 at the timing is ½ (B / 2) of the maximum output voltage value B, the output value of the magnetic field change detected by the outer diameter detection magnetic sensor 13 is The maximum value D is specified. Therefore, the outer diameter detection unit 312 receives the coin according to the output signal of the magnetic field change detected by the outer diameter detection magnetic sensor 13 when the output value that is the maximum of the magnetic field change detected by the material detection magnetic sensor 11 is ½. The outer diameter of C is detected. Thereby, irrespective of the characteristic of the material detection magnetic sensor 11, the rate of change for each coin C increases, and the resolution (sensitivity) can be made sufficiently high.

  In addition, as shown by a two-dot chain line in FIG. 5, even if the coin C ′ passing through the coin passage 1 jumps up from the coin passage 1 due to the influence of dust or the like accumulated in the coin passage 1, the material of the coin C ′ is detected. The area overlapping with each of the magnetic sensor 11 (material detection coil 111) and the outer diameter detection magnetic sensor 13 (outer diameter detection coil 131) hardly changes. Therefore, a change in the relative positional relationship between the coin C (C ′) and the outer diameter detection magnetic sensor 13 due to accumulation of dust or the like can be allowed.

  Therefore, it is possible to identify the coin C with sufficiently high resolution while allowing a change in the relative positional relationship between the coin C and the outer diameter detection magnetic sensor 13 due to accumulation of dust or the like.

  Since the relative positional relationship between the coin C and the outer diameter detection magnetic sensor 13 due to the accumulation of dust and the like can be allowed in this way, the influence on the acceptance rate of the coin C can be reduced. It is possible to realize a coin identifying device that is excellent in performance.

  Further, according to the coin identification device, since the material thickness detection magnetic sensor 12 is disposed between the material detection magnetic sensor 11 and the outer diameter detection magnetic sensor 13, the exclusive area of the magnetic detection unit 10 is reduced. Thus, the entire apparatus can be reduced in size.

  Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made.

  In the above-described embodiment, the diameter of the material detection coil 111 constituting the material detection magnetic sensor 11 is not particularly specified. However, in the present invention, as shown in FIG. It is preferable to have a size that is equal to or slightly smaller than the width of the ring portion 41 of the coin 40. Here, the composite material coin 40 is, for example, a commemorative coin. As shown in FIG. 9, as shown in FIG. 9, an annular ring portion 41 and a disk-shaped core portion that fits into a hollow portion of the ring portion 41. 42, and the material of the ring part 41 and the core part 42 is different.

  Thus, if the diameter of the material detection coil 111 is equal to or slightly smaller than the width of the ring portion 41, the ring portion 41 and the core portion 42 of the composite material coin 40 can be used. The material can be detected.

  10 to 12 each show a modification of the coin identification device according to the embodiment of the present invention, and FIG. 10 is a schematic diagram schematically showing the arrangement and configuration of the magnetic detection unit. 11 is a cross-sectional view taken along line FF in FIG. 10, and FIG. 12 is a schematic diagram schematically showing a positional relationship between a coin passing through the coin passage and each magnetic sensor of the magnetic detection unit. In addition, the same code | symbol is attached | subjected to what has the same structure as embodiment mentioned above, and the description is abbreviate | omitted.

  In the magnetic detection unit 50 exemplified here, the material thickness detection magnetic sensor 12 has an inside diameter of the outside diameter detection magnetic sensor 13, more specifically, a material thickness detection coil 121 constituting the material thickness detection magnetic sensor 12 has an outside diameter. It forms the detection magnetic sensor 13 and is disposed inside an outer diameter detection coil 131 that is wound endlessly in such a manner that inner surfaces facing each other are separated from each other.

  In this case, the linear distance L from the center of the material detection magnetic sensor 11 to the outer diameter detection magnetic sensor 13 is the outer diameter of the coin C having the smallest outer diameter among all the coins C that may pass through the coin path 1. It is specified to be a smaller size.

  By adopting such a configuration, the area occupied by the magnetic detection unit 50 can be reduced, and the overall size of the apparatus can be reduced.

  FIG. 13 to FIG. 15 show other modified examples of the coin identifying device according to the embodiment of the present invention, respectively. FIG. 13 is a schematic diagram schematically showing the arrangement and configuration of the magnetic detection unit. 14 is a cross-sectional view taken along the line HH in FIG. 13, and FIG. 15 is a schematic diagram schematically showing the positional relationship between the coin passing through the coin passage and each magnetic sensor of the magnetic detection unit. In addition, the same code | symbol is attached | subjected to what has the same structure as embodiment mentioned above, and the description is abbreviate | omitted.

  In the magnetic detection unit 60 exemplified here, the material detection magnetic sensor 11 and the material thickness detection magnetic sensor 12 are arranged inside the outer diameter detection magnetic sensor 13, more specifically, the material detection coil 111 constituting the material detection magnetic sensor 11. And the material thickness detection coil 121 which comprises the material thickness detection magnetic sensor 12 comprises the outer diameter detection magnetic sensor 13, and the outer diameter detection coil 131 wound endlessly in the aspect which mutually separates the mutually opposing inner surface. Is placed inside. In this case, the linear distance L from the center of the material detection magnetic sensor 11 to the outer diameter detection magnetic sensor 13 is the outer diameter of the coin C having the smallest outer diameter among all the coins C that may pass through the coin path 1. It is specified to be a smaller size.

  By adopting such a configuration, the area occupied by the magnetic detection unit 60 can be reduced, and the overall size of the apparatus can be reduced.

  Moreover, in embodiment mentioned above, the magnetic detection unit 10 is arrange | positioned in order of the material detection magnetic sensor 11, the material thickness detection magnetic sensor 12, and the outer diameter detection magnetic sensor 13 from the upstream along the passage direction of the coin C. However, the present invention is not limited to this, and as shown in FIG. 16, the magnetic detection unit 10 ′ includes a material detection magnetic sensor 11, an outer diameter detection magnetic sensor 13, and a material thickness detection magnetic sensor 12. They may be arranged in order.

  In the above-described embodiment, the outer diameter detection unit 312 detects the outer diameter when the output value (maximum output voltage value B) that maximizes the magnetic field change detected by the material detection magnetic sensor 11 is ½. Although the outer diameter of the coin C is detected from the output signal of the magnetic field change detected by the magnetic sensor 13, in the present invention, the outer diameter detection means is not limited to 1/2 of the maximum output voltage value B, and the material detection magnetism is used. When the output of the magnetic field change detected by at least one of the sensor and the material thickness detection magnetic sensor has a predetermined value, the outer diameter of the coin may be detected by the output signal of the magnetic field change detected by the outer diameter detection magnetic sensor. Absent.

  2, 3, 5, 8, 10, 12, 13, 15, and 16, the components of the magnetic detection unit 10 (10 ′, 50, 60) are hatched. Are attached for convenience, but this is for convenience of explanation and does not show a cross section.

  As described above, the coin identification device according to the present invention is useful for detecting the material and outer diameter of a coin passing through a coin passage.

DESCRIPTION OF SYMBOLS 1 Coin path | pass 10 Magnetic detection unit 11 Material detection magnetic sensor 111 Material detection coil 12 Material thickness detection magnetic sensor 121 Material thickness detection coil 13 Outer diameter detection magnetic sensor 131 Outer diameter detection coil 21a, 21b Oscillation circuit 22 Detection circuit for material detection coil 23 detection circuit for outer diameter detection coil 24 detection circuit for material thickness detection coil 25 AD converter 30 control unit 31 detection unit 311 material detection unit 312 outer diameter detection unit 313 material thickness detection unit 32 determination unit C coin

Claims (5)

Material detection means for detecting the material of the coin by detecting a magnetic field change according to the material of the coin passing through the material detection magnetic sensor arranged in the vicinity of the coin passage through which the inserted coin passes; and
The material thickness detection magnetic sensor arranged in the vicinity of the coin passage detects the thickness of the coin and the unevenness of the surface by detecting a magnetic field change according to the thickness of the passing coin and the unevenness of the surface. Means,
An outer diameter detection magnetic sensor arranged in the vicinity of the coin passage includes an outer diameter detection means for detecting an outer diameter of the coin by detecting a magnetic field change according to the outer diameter of the passing coin, In the coin identifying device for identifying the coin passing through the coin passage,
The outer diameter detecting means detects an outer diameter of the coin when an output of the magnetic field change detected by at least one of the material detection magnetic sensor and the material thickness detection magnetic sensor becomes a predetermined value. Coin identification device.   The outer diameter detecting means is configured to output the change of the coin based on the output signal of the magnetic field change detected by the outer diameter detection magnetic sensor when the output value is ½ of the maximum output value of the magnetic field change detected by the material detection magnetic sensor. The coin identification device according to claim 1, wherein an outer diameter is detected.   The outer diameter detection coil constituting the outer diameter detection magnetic sensor is disposed in the vicinity of the coin passage downstream of the material detection coil constituting the material detection magnetic sensor along the passage direction of the coin, and the material The material thickness detection coil which comprises a thickness detection magnetic sensor is arrange | positioned in the vicinity of the said coin path between the said material detection coil and the said outer diameter detection coil, The Claim 1 or Claim 2 characterized by the above-mentioned. Coin identification device. The outer diameter detecting coil that constitutes the outer diameter detecting magnetic sensor is wound endlessly in a manner in which inner surfaces facing each other are separated from each other,
The coin identifying device according to claim 1 or 2, wherein a material thickness detecting coil constituting the material thickness detecting magnetic sensor is disposed inside the outer diameter detecting coil. The outer diameter detecting coil that constitutes the outer diameter detecting magnetic sensor is wound endlessly in a manner in which inner surfaces facing each other are separated from each other,
The material detection coil constituting the material detection magnetic sensor and the material thickness detection coil constituting the material thickness detection magnetic sensor are arranged inside the outer diameter detection coil. 2. The coin identification device according to 2.

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