JP2014233331A - Apparatus for identifying coin-shaped detection object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic sensor-based apparatus for identifying coin-shaped detection objects which can by simplified configuration suppress the fluctuations of sensor characteristics due to external factors such as temperature variations.SOLUTION: An apparatus for identifying coin-shaped detection object 1 comprises: an excitation coil 8 and a detection coil 9; a bobbin 20 on which the excitation coil 8 is formed; a bobbin 21 on which the detection coil 10 is formed; a core body 11 on which the excitation coil 8 and the detection coil 9 are formed by way of the bobbin 20 and the bobbin 21; and a case body 3 in which the core body 11 is housed. A passage through which a detection body passes is formed within the apparatus for identifying coin-shaped detection object 1. In the case body 3 is formed a bobbin contact surface 3d with which the bobbins 20, 21 come into contact in the passing direction of the detection body. When the bobbins 20, 21 contact the bobbin contact surface 3d, the core body 11 on which the excitation coil 8 and detection coil 9 are formed is positioned in the passing direction of the detection body with respect to the case body 3.

Description

  The present invention relates to a coin-shaped detected object identifying device for identifying the authenticity of a coin-shaped detected object.

  Conventionally, a medal selector used in a slot machine is known (see, for example, Patent Document 1). The medal selector described in Patent Document 1 is a device for selecting medals inserted from a medal insertion slot, and discharges illegal medals having a small size to a medal tray and sends out regular medals to a medal tank. Yes. The medal selector is formed with a medal passage through which medals inserted from the medal insertion slot pass, and the medal selector sorts medals using the medal passage.

  Conventionally, a coin identification sensor used in a vending machine or a ticket machine is known (see, for example, Patent Document 2). The coin identification sensor described in Patent Document 2 includes a magnetic material / thickness sensor for detecting the material and thickness of the coin, and a magnetic diameter sensor for detecting the diameter of the coin. The material / thickness sensor is disposed on one side of the coin transport path in a direction orthogonal to the thickness direction of the coin passing through the coin transport path and the coin transport direction, and the diameter sensor is used to detect the coin passing through the coin transport path. It is arranged on the other side of the coin conveyance path in a direction orthogonal to the thickness direction and the coin conveyance direction.

JP 2009-72300 A JP 2003-6700 A

  In the medal selector described in Patent Document 1, since medals are selected using the medal passage, if the medal selector is used for many years and the guides constituting the medal passage are worn out, the medal selection accuracy decreases. Therefore, in a slot machine using this medal selector, if the slot machine has been used for many years and the guides constituting the medal passage are worn, there is a risk that an illegal medal will be used.

  On the other hand, in the coin identification sensor described in Patent Document 2, since the material / thickness sensor and the diameter sensor are magnetic sensors (magnetic sensors), the material, thickness, and diameter of the coin can be detected without contact. it can. Therefore, in this coin identification sensor, even if the coin identification sensor has been used for many years, it is possible to prevent a decrease in coin identification accuracy. Therefore, if this coin identification sensor is used in a medal identification device for a slot machine, even if the slot machine has been used for many years, it prevents the medal identification accuracy from degrading and prevents the use of illegal medals in the slot machine. It becomes possible.

  However, when a magnetic sensor is used in the medal identification device, the sensor characteristics (sensor characteristics) may vary due to external factors such as temperature fluctuations. The accuracy may be reduced.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to detect a coin-shaped object detection device that can suppress fluctuations in sensor characteristics caused by external factors such as temperature fluctuations with a simple configuration in a coin-shaped object identification device having a magnetic sensor. The object is to provide a body identification device.

  In order to solve the above-described problems, a coin-shaped object identification device according to the present invention has an internal passage for passing a coin-shaped object to be detected, an excitation coil, a detection coil, and an excitation coil. The excitation side bobbin around which the coil is wound, the detection side bobbin around which the detection coil is wound, the excitation coil is wound through the excitation side bobbin, and the detection coil is wound through the detection side bobbin. And a case body in which a core body around which an excitation coil and a detection coil are wound is housed, and the case body is excited so that an excitation side bobbin abuts in a passing direction of the detected body A detection-side bobbin contact surface is formed, a detection-side bobbin contact surface that contacts the detection-side bobbin in the passing direction of the detection object is formed, and the excitation-side bobbin contacts the excitation-side bobbin contact surface. And detection side bobbin contact surface There By abutment, the core body excitation coil and the detecting coil is wound in the passage direction of the object to be detected, characterized in that it is positioned relative to the case body.

  In the coin-shaped object identification device of the present invention, the excitation side bobbin and the excitation side bobbin contact surface are in contact with each other, and the detection side bobbin and the detection side bobbin contact surface are in contact with each other. The core body around which the detection coil is wound is positioned with respect to the case body. For this reason, in the present invention, the core body is less likely to be affected by the thermal expansion of the case body and the vibration of the case body accompanying fluctuations in the ambient temperature. That is, when the core body is directly brought into contact with the case body and the core body around which the exciting coil and the detection coil are wound is positioned with respect to the case body, the influence of the thermal expansion of the case body and the vibration of the case body However, in the present invention, since the core body is positioned with respect to the case body using the excitation side bobbin and the detection side bobbin, the influence of the thermal expansion of the case body and the case body The core body is less susceptible to the effects of vibrations. Therefore, in the present invention, it is possible to suppress fluctuations in sensor characteristics due to external factors such as temperature fluctuations with a simple configuration in which the excitation side bobbin and the detection side bobbin are brought into contact with the case body.

  In the present invention, for example, the core body is formed in a flat plate shape with the passing direction of the detected body as the thickness direction. In this case, when the core body is directly brought into contact with the case body and the core body around which the exciting coil and the detection coil are wound is positioned with respect to the case body in the passing direction of the detected body, the case body As a result, the thermal expansion of the case body and the vibration of the case body tend to have a large influence on the core body. Even if the core body is formed in a flat plate shape whose thickness direction is the direction of passage of the body to be detected, it becomes possible to suppress the deformation of the core body, and the influence of the thermal expansion of the case body and the vibration of the case body. The core body is less likely to be affected.

  In the present invention, if one of the thickness directions of the detected object passing through the passage is the first direction and the other of the thickness directions of the detected object passing through the passage is the second direction, the excitation side bobbin An excitation-side coil winding portion around which the coil is wound, a first excitation-side flange that is formed so as to be connected to the second direction end of the excitation-side coil winding portion and extends to the outer peripheral side of the excitation-side bobbin, and an excitation-side coil A second exciting side flange that is formed so as to be connected to the first direction end of the winding portion and extends to the outer peripheral side of the excitation side bobbin, and the detection side bobbin is wound on the detection side coil around which the detection coil is wound A first detection side flange that extends to the outer peripheral side of the detection side bobbin, and a second direction end of the detection side coil winding part. And a second detection side flange that extends to the outer peripheral side of the detection side bobbin. The side flange and the second excitation side flange are in contact with the excitation side bobbin contact surface, and the first detection side flange and the second detection side flange are in contact with the detection side bobbin contact surface. Thus, it is preferable that the core body around which the excitation coil and the detection coil are wound is positioned with respect to the case body in the passing direction of the detected body.

  If comprised in this way, in the thickness direction of a to-be-detected body, the 1st excitation side collar part and 2nd excitation side collar part which are arrange | positioned on both sides of the excitation side coil winding part contact | abut the excitation side bobbin contact surface. The contact state between the excitation side bobbin and the case body can be stabilized. Further, with this configuration, the first detection side flange and the second detection side flange disposed on both sides of the detection side coil winding portion in the thickness direction of the detection target are in contact with the detection side bobbin contact surface. Therefore, the contact state between the detection-side bobbin and the case body can be stabilized.

  In the present invention, the coin-shaped object identification device includes a circuit board that is disposed inside the case body and to which the excitation coil and the detection coil are electrically connected, and the circuit board is in the direction of passage of the object to be detected. It is preferable to cover one surface of the core body. If comprised in this way, it will become possible to make the conductor pattern formed in a circuit board function as an electromagnetic shield in the one side of the core body in the passage direction of a to-be-detected body. Therefore, even if an electromagnetic shield is not separately provided on one side of the core body in the passing direction of the detected object, the other side of the core body in the passing direction of the detected object is orthogonal to the passing direction of the detected object. If an electromagnetic shield is provided in the direction, it is possible to suppress a decrease in the identification accuracy of the detection target due to an external electromagnetic wave. As a result, it is possible to simplify the configuration of the coin-shaped detected object identification device even if it is possible to suppress a decrease in the identification accuracy of the detected object due to external electromagnetic waves.

  In the present invention, when viewed from the passing direction of the detection target, the area of the circuit board is larger than the area of the core body, and the circuit board preferably covers substantially the entire area of the core body. If comprised in this way, it will become possible to reduce effectively the influence of the electromagnetic waves from the outside using a circuit board in the one side of the core body in the passage direction of a detected object.

  In the present invention, the case body is preferably filled with resin. If comprised in this way, it will become possible to improve the impact resistance etc. of a coin-shaped to-be-detected body identification device.

  In the present invention, for example, the coin-shaped object identification device includes a second detection coil in addition to the detection coil, and one of the thickness directions of the object to be detected passing through the passage is defined as the first direction. The other of the thickness direction of the detected object passing through the path is the second direction, the direction orthogonal to the detected object passing direction and the detected object thickness direction is the orthogonal direction, and one of the orthogonal directions is the third direction. When the other of the orthogonal directions is the fourth direction, the core body is arranged on the first direction side and the first core around which the exciting coil is wound, and on the second direction side, the detection coil and the second detection are arranged. A second core around which the coil for winding is wound. The second core is disposed on the end side in the third direction of the passage and protrudes toward the first core; and the fourth direction of the passage A second convex portion disposed on the end side and projecting toward the first core; and the first convex portion and the second convex portion Includes a third protrusion protruding toward the disposed first core, the proximal end of the first convex portion and a base portion having a base end and the base end of the third convex portion of the second convex portion is connected to.

  In the present invention, the coin-shaped object identification device includes a second detection-side bobbin around which a second detection coil is wound, and the detection-side bobbin is a detection-side coil winding portion around which the detection coil is wound. The second detection-side bobbin includes a second detection-side coil winding portion around which the second detection coil is wound, and on the inner peripheral side of the detection-side bobbin, the first convex portion, the second convex portion, and The third convex portion is arranged, the third convex portion is arranged on the inner peripheral side of the second detection side bobbin, and at least a part of the second detection side coil winding portion of the detection side coil winding portion is arranged. It is preferable to arrange on the inner peripheral side.

  If comprised in this way, it will become possible to identify the outer diameter of a to-be-detected body mainly using a coil for a detection, and to identify mainly the material and thickness of a to-be-detected body using a 2nd detection coil. Therefore, it becomes possible to increase the identification accuracy of the detection object. Moreover, since at least one part of a 2nd detection side coil winding part is arrange | positioned in this way at the inner peripheral side of a detection side coil winding part, a coin-shaped to-be-detected body identification device and a detection coil are used. Even when the second detection coil is provided, at least a part of the second detection coil and the detection coil can be arranged at substantially the same position in the thickness direction of the detection target. . Therefore, it becomes possible to increase the identification accuracy of the detection object. That is, when the detection coil and the second detection coil are completely displaced in the thickness direction of the detection object, the signal of the output signal of the detection coil output according to the detection object passing through the passage When identifying the detected object by the combination of the level and the signal level of the output signal of the second detection coil, the variation of the combination increases, and the identification accuracy when identifying the detected object may decrease. . On the other hand, when at least a part of the second detection coil and the detection coil are arranged at substantially the same position in the thickness direction of the detection object, the signal level of the output signal of the detection coil and the second detection are detected. When it is possible to reduce the variation in the combination with the signal level of the output signal of the coil for detection, the object to be detected is identified using the output signal of the detection coil and the output signal of the second detection coil. It becomes possible to improve the identification accuracy of the.

  In the present invention, the detection coil is wound in a cylindrical shape so that the first convex portion, the second convex portion, and the third convex portion are arranged on the inner peripheral side, and the second detection coil is the third The convex portion is wound in a cylindrical shape so as to be arranged on the inner peripheral side thereof, and the end surface on the first direction side of the base is defined as the base end surface, and the base end surface is more than the end surface on the third direction side of the first convex portion. The three-direction side is the first base end surface, the base direction end surface is the second base end surface of the second direction from the fourth direction end surface of the second convex portion, and the first convex portion and the third convex portion of the base end surface Is the third base end face, and the base end face is the fourth base end face between the second convex part and the third convex part, the first base end face and the second base end face are the thickness of the object to be detected. The third base end face and the fourth base end face are arranged at the same position in the thickness direction of the detection target, and the third base end face and the first base end face are arranged at the same position in the direction. Base end surface preferably than the first base end face and the second base end surface is arranged in the second direction.

  If comprised in this way, it will become possible to identify the outer diameter of a to-be-detected body mainly using a coil for a detection, and to identify mainly the material and thickness of a to-be-detected body using a 2nd detection coil. Therefore, it becomes possible to increase the identification accuracy of the detection object. Further, with this configuration, for example, even if the detection-side bobbin is disposed so as to contact the first base end surface and the second base end surface, the third base end surface and the fourth base in the thickness direction of the detection target body. A gap is formed between the end surface and the detection side bobbin. Therefore, using this gap, it becomes possible to arrange the terminal pin to which the end of the second detection coil is connected in parallel with the passing direction of the detected object, and as a result, freedom of arrangement of the terminal pin. It becomes possible to increase the degree.

  In the present invention, the coin-shaped object identification device includes a second detection-side bobbin around which a second detection coil is wound, and the detection-side bobbin is a detection-side coil winding portion around which the detection coil is wound. And a first detection side flange that is formed to be connected to the first direction end of the detection side coil winding portion and extends to the outer peripheral side of the detection side bobbin, and a second direction end of the detection side coil winding portion. A second detection side flange that is formed and spreads to the outer peripheral side of the detection side bobbin, and the second detection side bobbin has a second detection side coil winding portion around which a second detection coil is wound, and a second detection side. A third detection side flange that is formed to be connected to the first direction end of the side coil winding portion and extends to the outer peripheral side of the second detection side bobbin, and is connected to the second direction end of the second detection side coil winding portion. And a fourth detection side flange that extends to the outer peripheral side of the second detection side bobbin, and has a thickness of the detection object. The thickness of the first detection side collar in the thickness direction of the detected object is smaller than the thickness of the second detection side collar in the thickness direction of the detected object. The thickness of the fourth detection side flange in the thickness direction of the detection target is preferably thinner.

  If comprised in this way, the thickness of the 1st detection side collar is thinner than the thickness of the 2nd detection side collar, and the thickness of the 3rd detection side collar is thinner than the thickness of the 4th detection side collar. Therefore, the excitation coil is wound around the detection coil wound around the detection coil winding part and the second detection coil wound around the second detection coil winding part. It is arranged at a position closer to one core. Therefore, the detection coil and the second detection coil can be arranged at a location where the magnetic flux density in the magnetic field generated by the excitation coil is high, and as a result, the identification accuracy of the detection object can be improved. It becomes possible. Moreover, since the thickness of the 2nd detection side collar part is thicker than the thickness of the 1st detection side collar part when comprised in this way, the terminal pin to which the edge part of the coil for a detection is connected is a to-be-detected body. The terminal pin can be attached to the second detection side flange so as to be parallel to the passing direction. Similarly, since the thickness of the fourth detection side collar is thicker than the thickness of the third detection side collar, the terminal pin to which the end of the second detection coil is connected is defined as the passing direction of the detected object. The terminal pins can be attached to the fourth detection side flange so as to be parallel.

  In the present invention, the coin-shaped object identification device includes a second detection-side bobbin around which the second detection coil is wound, two first terminal pins to which both ends of the detection coil are connected, And two second terminal pins to which both ends of the second detection coil are connected, the detection coil is wound around the first direction side of the detection side bobbin, and the second direction side of the detection side bobbin is The first terminal pin is attached, the second detection coil is wound on the first direction side of the second detection side bobbin, and the second terminal pin is attached on the second direction side of the second detection side bobbin. Is preferred.

  With this configuration, the detection coil is wound on the first direction side of the detection side bobbin, and the second detection coil is wound on the first direction side of the second detection side bobbin. And the second detection coil are disposed closer to the first core around which the excitation coil is wound. Therefore, the detection coil and the second detection coil can be arranged at a location where the magnetic flux density in the magnetic field generated by the excitation coil is high, and as a result, the identification accuracy of the detection object can be improved. It becomes possible.

  In the present invention, the coin-shaped detected object identification device includes two excitation-side terminal pins to which both ends of the excitation coil are connected, and the first core is disposed on the end side in the third direction of the passage. A fourth convex portion projecting toward the first convex portion, a fifth convex portion disposed on the fourth direction end side of the passage and projecting toward the second convex portion, and the fourth convex portion and the fifth convex portion. 6th convex part which is arrange | positioned between these parts and protrudes toward a 3rd convex part, and a 4th convex part, a 5th convex part, and a 6th convex part are arrange | positioned at the inner peripheral side of the excitation side bobbin. Preferably, an excitation coil is wound around the second direction side of the excitation side bobbin, and an excitation side terminal pin is attached to the first direction side of the excitation side bobbin.

  If comprised in this way, since the 4th convex part, the 5th convex part, and the 6th convex part are wound in the 2nd direction side of the excitation side bobbin by which an inner peripheral side is arrange | positioned, the 1st convex part is wound. Suppressing short circuit of the magnetic path in the core, between the first convex portion and the fourth convex portion, between the second convex portion and the fifth convex portion, and between the third convex portion and the sixth convex portion. It is possible to increase the magnetic flux density between the parts. Therefore, the identification of the detected object that passes between the first convex portion and the fourth convex portion, between the second convex portion and the fifth convex portion, and between the third convex portion and the sixth convex portion. The accuracy can be increased.

  In the present invention, the core body is preferably composed of a single metal plate formed by pressing, and is arranged so that the passing direction of the detected body is the thickness direction thereof. If comprised in this way, it will become possible to simplify the structure of a core body. In general, since the thickness of the core body formed by press working is thin, when configured in this way, even when a plurality of detected bodies pass through the core body continuously, a plurality of pieces that pass through the core body continuously. It becomes possible to increase the fluctuation amount of the output signal from the detection coil between the detection objects. Therefore, even if a plurality of detected objects pass through the core body continuously, it is possible to appropriately identify the authenticity of each of the detected objects.

  In the present invention, when the direction orthogonal to the passing direction of the detected object and the thickness direction of the detected object is the orthogonal direction, one of the orthogonal directions is the third direction, and the other of the orthogonal directions is the fourth direction, the core body The first core, the second core, the first connecting core that connects the end portion of the first core in the third direction and the end portion of the second core in the third direction, and the first core in the fourth direction It is preferable that the second core is formed in an annular shape having a second connecting core that connects the end and the end of the second core in the fourth direction. If comprised in this way, it will become possible to reduce the leakage from the core body of the magnetic flux which an exciting coil generates. Therefore, an efficient magnetic circuit can be formed in the core body. Moreover, if comprised in this way, it will become possible to make a core body function as a magnetic shield, and it will become possible to suppress the fall of the identification accuracy of the to-be-detected body resulting from an external magnetic field.

  As described above, according to the present invention, it is possible to suppress fluctuations in sensor characteristics due to external factors such as temperature fluctuations with a simple configuration in a coin-shaped object identification device having a magnetic sensor.

It is a perspective view of the coin-shaped to-be-detected body identification device concerning embodiment of this invention. It is a bottom view of the coin-shaped to-be-detected body identification device shown in FIG. It is a perspective view which shows the state which removed the case body and the circuit board from the coin-shaped to-be-detected body identification device shown in FIG. 1 from the bottom face side. FIG. 4 is a perspective view of a state where an excitation coil, a detection coil, and a bobbin are removed from the state shown in FIG. 3. It is a perspective view of the annular core shown in FIG. FIG. 4 is a bottom view of the annular core shown in FIG. 3. It is a circuit block diagram of the coin-shaped to-be-detected object identification device shown in FIG. It is a figure for demonstrating the coil output signal produced | generated based on the output signal from the coil for a detection shown in FIG. It is sectional drawing of the EE cross section of FIG. It is sectional drawing of the FF cross section of FIG. FIG. 3 is a bottom view of the circuit board shown in FIG. 2. It is a bottom view of the case body shown in FIG. It is a figure for demonstrating the effect of the coin-shaped to-be-detected body identification device shown in FIG. It is a figure for demonstrating the effect of the coin-shaped to-be-detected body identification device shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Schematic configuration of the coin-shaped object identification device)
FIG. 1 is a perspective view of a coin-shaped object identification device 1 according to an embodiment of the present invention. FIG. 2 is a bottom view of the coin-shaped detected object identification device 1 shown in FIG. FIG. 3 is a perspective view showing a state in which the case body 3 and the circuit board 6 are removed from the coin-shaped object identification device 1 shown in FIG. 1 from the bottom side. 4 is a perspective view showing a state where the exciting coil 8, the detecting coil 9, and the bobbins 20 and 21 are removed from the state shown in FIG.

  The coin-shaped object identification device 1 of the present embodiment identifies the authenticity of the medal 2 that is a coin-shaped object to be detected, and whether the true medal 2 is a good product or a defective product (that is, a true product) It is a device for identifying whether or not the medal 2 has become defective due to wear or deformation, and is mounted on a slot machine (not shown) and used. That is, the coin-shaped detected object identification device 1 of this embodiment is a device for identifying the authenticity of the medal 2 inserted from the medal insertion slot of the slot machine. Therefore, hereinafter, the coin-shaped detected object identification device 1 of this embodiment is referred to as a “medal identification device 1”. As illustrated in FIGS. 1 to 3, the medal identification device 1 includes a case body 3 and a magnetic sensor 4 accommodated in the case body 3. In addition, a passage 5 through which the medal 2 passes is formed inside the medal identification device 1. The medal 2 is formed of a magnetic metal material. The medal 2 is formed in a disc shape.

  In the following description, as shown in FIG. 1 and the like, the three directions orthogonal to each other are the X direction, the Y direction, and the Z direction, the X direction is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the up-down direction. . Also, the X1 direction side is the “right” side, the X2 direction side is the “left” side, the Y1 direction side is the “front” side, the Y2 direction side is the “rear (back)” side, the Z1 direction side is the “upper” side, The Z2 direction side is the “lower” side. In this embodiment, the medal 2 passes through the passage 5 from the upper side to the lower side. That is, the vertical direction is the passing direction of the medal 2 passing through the passage 5.

  The case body 3 is formed of a resin material. Further, the case body 3 is formed in a substantially rectangular parallelepiped box shape having an upper surface portion 3 a constituting the upper surface of the case body 3 and side surface portions 3 b constituting the four front, rear, left and right side surfaces of the case body 3. The lower surface of the case body 3 is open. The opening part of the lower surface of the case body 3 is covered with the cover member 7 (refer FIG. 9, FIG. 10). The cover member 7 is formed in a thin flat plate shape. A circuit board 6 is fixed to the lower end side inside the case body 3 (see FIG. 2). A slit-shaped passage hole 3c through which the medal 2 passes is formed in the upper surface portion 3a. The circuit board 6 is also formed with a slit-shaped passage hole 6a through which the medal 2 passes. The cover member 7 is also formed with a slit-like passage hole (not shown) through which the medal 2 passes. The passage holes and the passage holes 3 c and 6 a formed in the cover member 7 are connected to the passage path 5. A guide member (not shown) for guiding the medal 2 to the passage hole 3c is fixed to the case body 3. In addition, illustration of the cover member 7 is abbreviate | omitted in FIG.

  A thin metal plate (not shown) formed in a flat plate shape is fixed to the upper surface of the upper surface portion 3a. Further, thin metal plates (not shown) formed in a flat plate shape are also fixed to front, rear, left and right outer surfaces of the four side surfaces constituting the side surface portion 3b. These metal plates are made of a metal material having magnetism and function as an electromagnetic shield for protecting the magnetic sensor 4 from electromagnetic waves outside the medal identification device 1. A more specific configuration of the case body 3 will be described later.

  As shown in FIGS. 3 and 4, the magnetic sensor 4 includes an excitation coil 8, detection coils 9 and 10, and an annular core body around which the excitation coil 8 and the detection coils 9 and 10 are wound. And a core 11. The exciting coil 8 and the detecting coils 9 and 10 are electrically connected to the circuit board 6. The annular core 11 is made of a magnetic material. For example, the annular core 11 is formed of an iron-based magnetic material such as ferrite, amorphous, or permalloy. The annular core 11 is formed in a thin flat plate shape. For example, the thickness of the annular core 11 is about 0.5 mm. Hereinafter, a specific configuration of the magnetic sensor 4 will be described.

(Configuration of magnetic sensor)
FIG. 5 is a perspective view of the annular core 11 shown in FIG. 6 is a bottom view of the annular core 11 shown in FIG. FIG. 7 is a circuit block diagram of the coin-shaped detected object identification device 1 shown in FIG. FIG. 8 illustrates a coil output signal SG1 generated based on the output signal from the detection coil 9 shown in FIG. 7 and a coil output signal SG2 generated based on the output signal from the detection coil 10. FIG.

  As described above, the magnetic sensor 4 includes the excitation coil 8, the detection coils 9 and 10, and the annular core 11. Further, the magnetic sensor 4 has a bobbin 20 as an excitation side bobbin around which the excitation coil 8 is wound, a bobbin 21 as a detection side bobbin around which the detection coil 9 is wound, and a detection coil 10 wound around. The bobbin 22 as the second detection side bobbin, the two terminal pins 23 as the excitation side terminal pins to which both ends of the excitation coil 8 are connected, and the both ends of the detection coil 9 are respectively Two terminal pins 24 as first terminal pins to be connected and two terminal pins 25 as second terminal pins to which both ends of the detection coil 10 are connected are provided.

  In this embodiment, the medal identification device 1 is arranged so that the thickness direction of the annular core 11 coincides with the vertical direction, and the medal 2 passes through the passage 5 from the upper side to the lower side as described above. pass. That is, in the present embodiment, the thickness direction of the annular core 11 and the passing direction of the medal 2 are the same. The front-rear direction is the thickness direction of the medal 2 that passes through the passage 5. In addition, the left-right direction of this form is an orthogonal direction orthogonal to the passing direction of the medal 2 and the thickness direction of the medal 2. The forward direction is the first direction that is one of the thickness directions of the medal 2, the rear direction is the second direction that is the other of the thickness directions of the medal 2, and the right direction is one of the orthogonal directions. It is the third direction, and the left direction is the fourth direction which is the other of the orthogonal directions.

  The annular core 11 is formed in an annular shape. Specifically, the annular core 11 is formed in a substantially square annular shape that is elongated in the left-right direction. The annular core 11 constitutes a front side portion of the annular core 11 and a substantially linear first core 12 arranged in parallel with the left-right direction, and constitutes a rear side portion of the annular core 11 and the first core 12. A substantially linear second core 13 arranged in parallel; a linear first connecting core 14 connecting the right end of the first core 12 and the right end of the second core 13 and arranged in parallel with the front-rear direction; It is composed of a linear second connecting core 15 that connects the left end of the first core 12 and the left end of the second core 13 and is arranged in parallel with the first connecting core 14. The annular core 11 of this embodiment is formed by press punching, and the first core 12, the second core 13, the first connection core 14, and the second connection core 15 are integrally formed. That is, the annular core 11 is formed by a single metal plate formed by pressing.

  The first core 12 and the second core 13 are formed in the same shape, and the first connection core 14 and the second connection core 15 are formed in the same shape. Further, as shown in FIG. 6, the annular core 11 is formed in a line-symmetric shape with respect to a center line CL1 parallel to the left-right direction passing through the center position of the annular core 11 in the front-rear direction, and in the left-right direction. It is formed in a line-symmetric shape with respect to a center line CL2 parallel to the front-rear direction passing through the center position of the annular core 11.

  The first core 12 is formed with convex portions 12a, 12b, and 12c that protrude toward the second core 13 (that is, toward the rear side). The front ends of the convex portions 12 a to 12 c (that is, the base ends of the convex portions 12 a to 12 c) are connected to the base portion 12 d of the first core 12. The convex portions 12a to 12c are formed in a rectangular shape. The rear end surfaces (that is, the front end surfaces) of the convex portions 12a to 12c are parallel to the left-right direction, and the left and right end surfaces of the convex portions 12a to 12c are parallel to the front-rear direction. Further, the rear end surfaces of the convex portions 12a to 12c are arranged at the same position in the front-rear direction. The width of the convex portion 12c in the left-right direction is narrower than the width of the convex portions 12a and 12b.

  The convex portion 12a is disposed on the right end side, the convex portion 12b is disposed on the left end side, and the convex portion 12c is disposed between the convex portion 12a and the convex portion 12b. Specifically, the convex part 12c is arranged so that the center of the convex part 12c in the left-right direction and the center of the first core 12 coincide with each other, and the convex part 12a and the convex part 12b have the center line CL2 as an axis of symmetry. It is arranged at a line symmetrical position. The convex portion 12a and the convex portion 12b are formed in the same shape, and the first core 12 is formed in a line-symmetric shape with respect to the center line CL2. The convex part 12a of this form is a 4th convex part, the convex part 12b is a 5th convex part, and the convex part 12c is a 6th convex part.

  In the left-right direction, a gap is formed between the convex portion 12 a and the first connecting core 14, and a gap is formed between the convex portion 12 b and the second connecting core 15. In the left-right direction, a gap is formed between the convex portion 12a and the convex portion 12c, and a gap is formed between the convex portion 12b and the convex portion 12c. As described above, the first core 12 is formed in a line-symmetric shape with respect to the center line CL2, and the gap between the convex portion 12a and the first connecting core 14, and the convex portion 12b and the second connecting core 15 are formed. Are the same size, and the gap between the convex portion 12a and the convex portion 12c and the gap between the convex portion 12b and the convex portion 12c are the same size.

  Further, the rear end surface 12e of the base portion 12d between the convex portion 12a and the convex portion 12c and the rear end surface 12f of the base portion 12d between the convex portion 12b and the convex portion 12c are formed in a planar shape orthogonal to the front-rear direction. And are arranged at the same position in the front-rear direction. The rear end surface 12g of the base portion 12d between the convex portion 12a and the first connecting core 14 and the rear end surface 12h of the base portion 12d between the convex portion 12b and the second connecting core 15 are planar shapes that are orthogonal to the front-rear direction. And at the same position in the front-rear direction. The rear end surfaces 12e and 12f are disposed on the front side of the rear end surfaces 12g and 12h.

  As described above, the second core 13 is formed in the same shape as the first core 12, and is arranged at a line-symmetrical position with the central axis CL1 as the axis of symmetry. The second core 13 is formed with convex portions 13a, 13b, and 13c that protrude toward the first core 12 (that is, toward the front side). The rear ends of the convex portions 13 a to 13 c (that is, the base ends of the convex portions 13 a to 13 c) are connected to the base portion 13 d of the second core 13. The convex portions 13a to 13c are formed in the same shape as the convex portions 12a to 12c, and the front end surfaces (that is, the front end surfaces) of the convex portions 13a to 13c are arranged at the same position in the front-rear direction.

  In the left-right direction, the convex portion 13a is arranged at the same position as the convex portion 12a, the convex portion 13b is arranged at the same position as the convex portion 12b, and the convex portion 13c is arranged at the same position as the convex portion 12c. . That is, the convex part 13a protrudes toward the convex part 12a, the convex part 13b protrudes toward the convex part 12b, and the convex part 13c protrudes toward the convex part 12c. Similar to the first core 12, the second core 13 is formed in a line-symmetric shape with respect to the center line CL2. The convex part 13a of this form is a 1st convex part, the convex part 13b is a 2nd convex part, and the convex part 13c is a 3rd convex part.

  In the left-right direction, a gap is formed between the convex portion 13 a and the first connecting core 14, and the convex portion 13 a and the first connecting core 14 are provided between the convex portion 13 b and the second connecting core 15. A gap having the same size as the gap is formed. In the left-right direction, a gap is formed between the convex portion 13a and the convex portion 13c, and the same size as the gap between the convex portion 13a and the convex portion 13c is formed between the convex portion 13b and the convex portion 13c. A gap is formed.

  Further, the front end surface 13e of the base portion 13d between the convex portion 13a and the convex portion 13c and the front end surface 13f of the base portion 13d between the convex portion 13b and the convex portion 13c are formed in a plane shape orthogonal to the front-rear direction. And are arranged at the same position in the front-rear direction. A front end surface 13g of the base portion 13d between the convex portion 13a and the first connection core 14 and a front end surface 13h of the base portion 13d between the convex portion 13b and the second connection core 15 are planar shapes orthogonal to the front-rear direction. And at the same position in the front-rear direction. Further, the front end surfaces 13e and 13f are arranged behind the front end surfaces 13g and 13h. The front end faces 13e to 13h in this embodiment are base end faces. The front end face 13g is a first base end face, the front end face 13h is a second base end face, the front end face 13e is a third base end face, and the front end face 13f is a fourth base end face.

  A passage 5 is provided between the convex portions 12a to 12c and the convex portions 13a to 13c in the front-rear direction. The passage 5 is formed in a rectangular shape elongated in the left-right direction. As described above, the guide member for guiding the medal 2 to the passage hole 3 c is fixed to the case body 3. This guide member guides the medal 2 to the passage hole 3c so that the medal 2 passes between the right end surface of the convex portions 12a and 13a and the left end surface of the convex portions 12b and 13b. That is, the left-right distance L1 (see FIG. 6) between the right end surfaces of the convex portions 12a and 13a and the left end surfaces of the convex portions 12b and 13b is equal to the width in the left-right direction of the passage 5. Further, the width of the passage 5 in the left-right direction is larger than the outer diameter of the medal 2. That is, the distance L1 is larger than the outer diameter of the medal 2. Specifically, the width in the left-right direction of the passage 5 is the medal 2 that is assumed to be inserted from the medal slot of the slot machine, and is larger than the outer diameter of the medal 2 having the largest outer diameter. The distance L1 is larger than the outer diameter of the medal 2 having the largest outer diameter.

  Further, the convex portions 12c and 13c are formed so that the entire convex portions 12c and 13c overlap the medal 2 when viewed from the front-rear direction regardless of the position of the passage 5 in the left-right direction. Is also arranged. That is, even when the medal 2 passes through the passage 5 so that the right end surface of the convex portions 12a, 13a or the left end surface of the convex portions 12b, 13b coincides with the outer peripheral end of the medal 2, it is viewed from the front-rear direction. Sometimes, the convex portions 12 c and 13 c are formed and arranged so that the entire convex portions 12 c and 13 c overlap with the medal 2.

  Furthermore, the distance L2 between the convex portions 12a to 12c and the convex portions 13a to 13c in the front-rear direction (more specifically, the distance between the rear end surface of the convex portions 12a to 12c and the front end surface of the convex portions 13a to 13c in the front-rear direction). L2, see FIG. 6) is a distance L3 (see FIG. 6) between the right end surface of the convex portions 12a, 13a and the left end surface of the first connecting core 14 in the left-right direction, and the left end of the convex portions 12b, 13b in the left-right direction. It is shorter than the distance L4 (see FIG. 6) between the surface and the right end surface of the second connecting core 15. The distance L2 between the convex portion 12c and the convex portion 13c in the front-rear direction is the shortest distance between the convex portion 12c and the convex portion 13a (that is, the rear end of the right end surface of the convex portion 12c and the front end of the left end surface of the convex portion 13a). And the shortest distance between the convex portion 12c and the convex portion 13b (that is, the shortest distance between the rear end of the left end surface of the convex portion 12c and the front end of the right end surface of the convex portion 13b). Yes.

  Further, the distance L5 between the right end surface of the convex portions 12a, 13a and the right end surface of the convex portions 12b, 13b in the left-right direction, and the left end surface of the convex portions 12a, 13a and the left end surface of the convex portions 12b, 13b in the left-right direction Is smaller than the outer diameter of the medal 2. Specifically, the distances L5 and L6 are medals 2 that are assumed to be inserted from the medal insertion slot of the slot machine, and are smaller than the outer diameter of the medal 2 having the smallest outer diameter.

  The bobbin 20 is formed in a substantially rectangular tube shape with a hook, and includes a coil winding part 20a (see FIG. 10) around which the exciting coil 8 is wound, and two hook parts 20b and 20c. Yes. The flange portion 20b is formed so as to spread toward the outer peripheral side of the bobbin 20, and is connected to the rear end of the coil winding portion 20a. The flange portion 20c is formed so as to spread toward the outer peripheral side of the bobbin 20, and is connected to the front end of the coil winding portion 20a. The flanges 20b and 20c have a function of preventing the exciting coil 8 from being collapsed. The coil winding portion 20a of this embodiment is an excitation side coil winding portion, the flange portion 20b is a first excitation side flange portion, and the flange portion 20c is a second excitation side flange portion.

  The upper surface and the lower surface of the flange portions 20b and 20c are formed in a planar shape orthogonal to the vertical direction, and the right side surface and the left side surface of the flange portions 20b and 20c are formed in a planar shape orthogonal to the horizontal direction. The thickness of the flange portion 20b in the front-rear direction is thinner than the thickness of the flange portion 20c in the front-rear direction. The width of the flange portion 20b in the left-right direction is equal to the width of the flange portion 20c in the left-right direction. The height of the flange portion 20b in the vertical direction is equal to the height of the flange portion 20c in the vertical direction.

  As shown in FIG. 3, two wall portions 20 d for reinforcement are formed on the inner peripheral side of the bobbin 20. The two wall portions 20d are formed in a flat plate shape orthogonal to the left-right direction. Further, the two wall portions 20d are arranged with a predetermined interval in the left-right direction. The wall portion 20d is formed in the entire area in the vertical direction and in the entire area in the front-rear direction on the inner peripheral side of the bobbin 20.

  The bobbin 20 is attached to the 1st core 12 so that the convex parts 12a-12c may be arrange | positioned at the inner peripheral side. In the left-right direction, the convex portion 12a is disposed between the right end portion of the bobbin 20 and the wall portion 20d disposed on the right side, and the convex portion 12b is disposed on the left end portion of the bobbin 20 and the wall portion 20d disposed on the left side. The convex part 12c is arrange | positioned between the two wall parts 20d. The front end surface of the flange portion 20c is in contact with the rear end surfaces 12g and 12h of the first core 12. The front ends of the convex portions 12a to 12c slightly protrude rearward from the rear end surface of the flange portion 20b.

  The exciting coil 8 is wound around the coil winding portion 20a. That is, the exciting coil 8 is wound around the convex portions 12a to 12c via the bobbin 20 so that the convex portions 12a to 12c are arranged on the inner peripheral side thereof. Specifically, as shown in FIG. 3, the exciting coil 8 is formed on the convex portions 12a to 12c so as to cover the upper and lower surfaces of the convex portions 12a to 12c, the right end surface of the convex portion 12a, and the left end surface of the convex portion 12b. It is wound. The terminal pin 23 is fixed to the flange portion 20 c of the bobbin 20. The two terminal pins 23 are fixed to the left and right ends of the flange 20c. Moreover, the terminal pin 23 is being fixed to the collar part 20c so that it may protrude below and it may become parallel to an up-down direction. The lower end side of the terminal pin 23 is fixed to the circuit board 6 (see FIG. 10), and the exciting coil 8 is electrically connected to the circuit board 6 through the terminal pin 23. As described above, the thickness of the flange 20b in the front-rear direction is thinner than the thickness of the flange 20c in the front-rear direction. Therefore, in this embodiment, the exciting coil 8 is wound around the rear end side of the bobbin 20, and the terminal pin 23 is attached to the front end side of the bobbin 20.

  The bobbin 21 is formed in the same manner as the bobbin 20. That is, the bobbin 21 is formed in a substantially rectangular tube shape with a hook, and includes a coil winding part 21a (see FIG. 10) around which the detection coil 9 is wound, and two hook parts 21b and 21c. I have. The flange portion 21b is formed so as to spread toward the outer peripheral side of the bobbin 21, and is connected to the front end of the coil winding portion 21a. The flange portion 21c is formed so as to spread toward the outer peripheral side of the bobbin 21, and is connected to the rear end of the coil winding portion 21a. The flange portions 21b and 21c have a function of preventing the detection coil 9 from being collapsed. The coil winding part 21a of this form is a detection side coil winding part, the collar part 21b is a 1st detection side collar part, and the collar part 21c is a 2nd detection side collar part.

  The upper surface and the lower surface of the flange portions 21b and 21c are formed in a planar shape orthogonal to the vertical direction, and the right side surface and the left side surface of the flange portions 21b and 21c are formed in a planar shape orthogonal to the horizontal direction. The thickness of the flange portion 21b in the front-rear direction is thinner than the thickness of the flange portion 21c in the front-rear direction. The width of the flange portion 21b in the left-right direction is equal to the width of the flange portion 21c in the left-right direction, and the height of the flange portion 21b in the vertical direction is equal to the height of the flange portion 21c in the vertical direction. Further, as shown in FIG. 3, two wall portions 21 d for reinforcement are formed on the inner peripheral side of the bobbin 21. The two wall portions 21d are formed in a flat plate shape orthogonal to the left-right direction, and are arranged in a state where a predetermined interval is left in the left-right direction.

  The bobbin 21 is attached to the second core 13 so that the convex portions 13a to 13c are arranged on the inner peripheral side thereof. In the left-right direction, the convex portion 13a is disposed between the right end portion of the bobbin 21 and the wall portion 21d disposed on the right side, and the convex portion 13b is disposed on the left end portion of the bobbin 21 and the wall portion 21d disposed on the left side. The convex part 13c is arrange | positioned between the two wall parts 21d. The rear end surface of the flange portion 21 c is in contact with the front end surfaces 13 g and 13 h of the second core 13. The front end sides of the convex portions 13a to 13c slightly protrude forward from the front end surface of the flange portion 21b.

  The detection coil 9 is wound around the coil winding portion 21a. That is, the detection coil 9 is wound around the convex portions 13a to 13c via the bobbin 21 so that the convex portions 13a to 13c are arranged on the inner peripheral side thereof. Specifically, as shown in FIG. 3, the detection coil 9 covers the convex portions 13 a to 13 c so as to cover the upper and lower surfaces of the convex portions 13 a to 13 c, the right end surface of the convex portion 13 a, and the left end surface of the convex portion 13 b. It is wound. The terminal pin 24 is fixed to the flange portion 21 c of the bobbin 21. The two terminal pins 24 are fixed to the left and right ends of the flange 21c. Moreover, the terminal pin 24 is being fixed to the collar part 21c so that it may protrude below and it may become parallel to an up-down direction. The lower end side of the terminal pin 24 is fixed to the circuit board 6 (see FIGS. 9 and 10), and the detection coil 9 is electrically connected to the circuit board 6 through the terminal pin 24. As described above, the thickness of the flange 21b in the front-rear direction is thinner than the thickness of the flange 21c in the front-rear direction. Therefore, in this embodiment, the detection coil 9 is wound around the front end side of the bobbin 21, and the terminal pin 24 is attached to the rear end side of the bobbin 21.

  The bobbin 22 is formed in a substantially rectangular tube shape with a hook. The horizontal width of the bobbin 22 is narrower than the horizontal width of the bobbin 21. The vertical height of the bobbin 22 is lower than the vertical height of the bobbin 21. The width of the bobbin 22 in the front-rear direction is wider than the width of the bobbin 21 in the front-rear direction. The bobbin 22 includes a coil winding portion 22a (see FIG. 10) around which the detection coil 10 is wound, and two flange portions 22b and 22c. The flange portion 22b is formed so as to spread toward the outer peripheral side of the bobbin 22, and is connected to the front end of the coil winding portion 22a. The flange portion 22c is formed so as to spread toward the outer peripheral side of the bobbin 22, and is connected to the rear end of the coil winding portion 22a. The flange portions 22b and 22c serve to prevent the detection coil 10 from being collapsed. The coil winding part 22a of this form is a 2nd detection side coil winding part, the collar part 22b is a 3rd detection side collar part, and the collar part 22c is a 4th detection collar part.

  The upper surface and the lower surface of the flange portions 22b and 22c are formed in a planar shape orthogonal to the vertical direction, and the right side surface and the left side surface of the flange portions 22b and 22c are formed in a planar shape orthogonal to the horizontal direction. The thickness of the flange 22b in the front-rear direction is thinner than the thickness of the flange 22c in the front-rear direction. In this embodiment, the thickness of the flange portion 22c in the front-rear direction is substantially equal to the distance between the front end surfaces 13e, 13f and the front end surfaces 13g, 13h in the front-rear direction. The width of the flange 22b in the left-right direction is equal to the width of the flange 22c in the left-right direction, and the height of the flange 22b in the vertical direction is equal to the height of the flange 22c in the vertical direction.

  The bobbin 22 is attached to the 2nd core 13 so that the convex part 13c may be arrange | positioned at the inner peripheral side. The rear end surface of the flange portion 22c is in contact with the front end surfaces 13e and 13f of the second core 13. The front end side of the convex portion 13c slightly protrudes to the front side from the front end surface of the flange portion 22b. The coil winding portion 22 a is disposed on the inner peripheral side of the bobbin 21. In this embodiment, the thickness of the flange portion 21b of the bobbin 21 is equal to the thickness of the flange portion 22b. Further, in a state where the rear end surface of the flange portion 21c of the bobbin 21 and the front end surfaces 13g, 13h are in contact with each other, and the rear end surface of the flange portion 22c and the front end surfaces 13e, 13f of the second core 13 are in contact with each other, The front end surface of the flange portion 21b and the front end surface of the flange portion 22b are disposed at substantially the same position in the front-rear direction, and the rear end surface of the coil winding portion 22a and the rear end surface of the flange portion 21c are disposed at substantially the same position in the front-rear direction. (See FIG. 10). Therefore, the coil winding part 22a is arrange | positioned at the inner peripheral side of the coil winding part 21a of the bobbin 21, and the inner peripheral side of the collar part 21c. That is, a part of the front end side of the coil winding portion 22a is disposed on the inner peripheral side of the coil winding portion 21a.

  The detection coil 10 is wound around the coil winding portion 22a. That is, the detection coil 10 is wound around the convex portion 13c via the bobbin 22 so that the convex portion 13c is disposed on the inner peripheral side thereof. Specifically, as shown in FIG. 4, the detection coil 10 is wound around the convex portion 13c so as to cover the upper and lower surfaces, the right end surface, and the left end surface of the convex portion 13c. The terminal pin 25 is fixed to the flange portion 22 c of the bobbin 22. The two terminal pins 25 are fixed to the left and right ends of the flange 22c. Moreover, the terminal pin 25 is being fixed to the collar part 22c so that it may protrude below and it may become parallel to an up-down direction. The lower end side of the terminal pin 25 is fixed to the circuit board 6 (see FIGS. 9 and 10), and the detection coil 10 is electrically connected to the circuit board 6 through the terminal pin 25. As described above, the thickness of the flange portion 22b in the front-rear direction is thinner than the thickness of the flange portion 22c in the front-rear direction. Therefore, in this embodiment, the detection coil 10 is wound around the front end side of the bobbin 22 and the terminal pin 25 is attached to the rear end side of the bobbin 22. The detection coil 10 of this embodiment is a second detection coil. As described above, the rear end of the coil winding portion 22a and the rear end surface of the flange portion 21c are disposed at substantially the same position in the front-rear direction, and the flange portion 22c is located behind the rear end surface of the bobbin 21. Has been placed. Therefore, the terminal pin 25 does not contact the bobbin 21.

  As shown in FIG. 7, an AC power supply 26 is connected to one end of the conducting wire that constitutes the exciting coil 8, and the other end of the conducting wire that constitutes the exciting coil 8 is grounded. One end of a conducting wire constituting the detection coil 9 is connected to an MPU (Micro Processing Unit) 30 via an amplifier circuit 27, a rectifying circuit 28 and a level adjustment circuit 29, and the other end of the conducting wire constituting the detection coil 9 is Grounded. One end of the conducting wire constituting the detection coil 10 is connected to the MPU 30 via the amplifier circuit 31, the rectifier circuit 32 and the level adjusting circuit 33, and the other end of the conducting wire constituting the detection coil 10 is grounded. A comparator 35 is connected in parallel between the level adjustment circuit 29 and the MPU 30. The amplifier circuits 27 and 31, the rectifier circuits 28 and 32, the level adjustment circuits 29 and 33, the MPU 30, and the comparator 35 are mounted on the circuit board 6.

  In the magnetic sensor 4, when the medal 2 passes through the passage 5 in a state where the exciting coil 8 generates an AC magnetic field on the inner peripheral side of the annular core 11 by the electric power supplied from the AC power supply 26, The AC magnetic field on the inner circumference fluctuates. When the AC magnetic field on the inner peripheral side of the annular core 11 varies, the signal level of the output signal from the detection coil 9 and the signal level of the output signal from the detection coil 10 vary.

  As described above, one end of the conducting wire constituting the detection coil 9 is connected to the MPU 30 via the amplification circuit 27, the rectification circuit 28 and the level adjustment circuit 29, and is based on the output signal from the detection coil 9. The analog coil output signal SG1 generated in this way is input from the level adjustment circuit 29 to the MPU 30. Similarly, one end of the conducting wire constituting the detection coil 10 is connected to the MPU 30 via the amplification circuit 31, the rectification circuit 32, and the level adjustment circuit 33, and is generated based on the output signal from the detection coil 10. The analog coil output signal SG2 is input from the level adjustment circuit 33 to the MPU 30.

  In this embodiment, the circuit of the magnetic sensor 4 is configured such that when the medal 2 passes through the passage 5 while the exciting coil 8 generates an alternating magnetic field, the signal levels of the coil output signals SG1 and SG2 increase. Has been. For example, when one medal 2 passes through the magnetic sensor 4 (that is, when one medal 2 passes through the passage 5), the coil output signals SG1 and SG2 whose signal levels fluctuate as shown in FIG. Is input.

  As described above, the distance L1 in the left-right direction between the right end surface of the convex portions 12a, 13a and the left end surface of the convex portions 12b, 13b is equal to the width in the left-right direction of the passage 5 and the detection coil 9 is wound around the convex portions 13a to 13c via the bobbin 21 so as to cover the upper and lower surfaces of the convex portions 13a to 13c, the right end surface of the convex portion 13a, and the left end surface of the convex portion 13b. Therefore, the signal level of the coil output signal SG1 based on the output signal from the detection coil 9 varies depending on the influence of the material, thickness and outer diameter of the medal 2 passing through the passage 5.

  On the other hand, the convex portions 12c and 13c are disposed between the convex portions 12a and 13a and the convex portions 12b and 13b, and the medal 2 passes through any position of the passage 5 in the left-right direction from the front-rear direction. When viewed, the projections 12c and 13c are entirely formed and arranged so as to overlap the medal 2, and the detection coil 10 is wound around the projection 13c. Therefore, the signal level of the coil output signal SG2 based on the output signal from the detection coil 10 varies mainly due to the influence of the material and thickness of the medal 2 passing through the passage 5.

  Here, the signal levels of the coil output signals SG <b> 1 and SG <b> 2 may fluctuate due to influences such as fluctuations in the ambient temperature of the medal identification device 1. In this embodiment, in order to prevent the signal levels of the coil output signals SG1 and SG2 from deviating from the measurable range in the MPU 30 even if the ambient temperature of the medal identification device 1 varies, the coil output signal SG1 and The signal level of SG2 is regularly adjusted. Specifically, the level adjustment circuit 29 periodically changes the signal level of the coil output signal SG1 based on the level adjustment signal output from the MPU 30 based on the signal level of the coil output signal SG1 and input to the level adjustment circuit 29. The level adjustment circuit 33 periodically adjusts the signal level of the coil output signal SG2 based on the level adjustment signal output from the MPU 30 and input to the level adjustment circuit 33 based on the signal level of the coil output signal SG2. ing.

  In the present embodiment, the MPU 30 acquires the signal values of the coil output signals SG1 and SG2 when the signal level of the coil output signal SG1 is equal to or higher than a predetermined threshold. Specifically, first, the comparator 35 compares the signal level of the coil output signal SG1 input from the level adjustment circuit 29 with a threshold value and outputs the comparison result to the MPU 30. Moreover, MPU30 acquires the signal value of coil output signal SG1, SG2 when the signal level of coil output signal SG1 is more than a threshold value.

  Since the material, thickness, diameter, and the like vary depending on the type of the medal 2, the peak value P1 of the signal level of the coil output signal SG1 and the coil output signal SG2 according to the type of the medal 2 that passes through the passage 5. The peak value P2 of the signal level changes. Therefore, the MPU 30 determines whether or not the medal 2 passing through the passage 5 is a true medal to be used in the slot machine on which the medal identification device 1 is mounted based on the peak value P1 and the peak value P2. Identify. Specifically, in the MPU 30, when the peak value P1 is within a predetermined range and the peak value P2 is within the predetermined range, the medal 2 passing through the passage 5 is mounted on the medal identification device 1. Identified as a true medal to be used in a slot machine. That is, the MPU 30 determines whether or not the medal 2 passing through the passage 5 is a true medal to be used in the slot machine on which the medal identification device 1 is mounted, by the combination of the peak value P1 and the peak value P2. Identify.

  The circuit of the magnetic sensor 4 is configured so that the signal levels of the coil output signals SG1 and SG2 are reduced when the medal 2 passes through the passage 5 while the exciting coil 8 generates an alternating magnetic field. May be. In this case, for example, based on the bottom values of the signal levels of the coil output signals SG1 and SG2, the medal 2 passing through the passage 5 is a true one to be used in the slot machine on which the medal identification device 1 is mounted. Whether it is a medal or not is identified.

(Configuration of circuit board and case body)
FIG. 9 is a cross-sectional view taken along the line EE of FIG. 10 is a cross-sectional view taken along the line FF in FIG. FIG. 11 is a bottom view of the circuit board 6 shown in FIG. FIG. 12 is a bottom view of the case body 3 shown in FIG.

  The circuit board 6 is a rigid board such as a glass epoxy board, and is formed in a substantially rectangular flat plate shape. As described above, the circuit board 6 has the passage hole 6a. Further, the MPU 30 and the like are mounted on the circuit board 6. As shown in FIG. 11, the circuit board 6 is formed with six fixing holes 6b through which the lower end portions of the terminal pins 23 to 25 are inserted and fixed. The circuit board 6 is formed with a conductor pattern made of a conductive material such as copper foil.

  As described above, the case body 3 is formed in a substantially rectangular parallelepiped box shape having the upper surface portion 3a and the side surface portion 3b. Further, the lower surface of the case body 3 is open, and the opening is covered with a cover member 7. In addition, the circuit board 6 is fixed to the lower end side of the case body 3, and a passage hole 3c is formed in the upper surface portion 3a. Inside the case body 3, an annular core 11 and a circuit board 6 around which the exciting coil 8 and the detecting coils 9 and 10 are wound are accommodated via bobbins 20 to 22.

  Inside the case body 3, a bobbin abutting surface 3d on which the upper surfaces of the bobbins 20 and 21 abut, a core support surface 3e on which the outer peripheral side portion of the annular core 11 can abut, and a substrate on which the circuit board 6 is fixed A fixed surface 3f is formed. Further, eight escape portions 3g for preventing interference between the terminal pins 23 to 25 and the case body 3 are formed inside the case body 3.

  The bobbin contact surface 3d is formed in a planar shape perpendicular to the vertical direction. In this embodiment, the lower surface of the upper surface portion 3a is a bobbin abutting surface 3d, and the shape of the bobbin abutting surface 3d when viewed from below is an elongated rectangular ring surrounding the passage hole 3c. As shown in FIG. 10, the upper surface of the flange portions 20b and 20c of the bobbin 20 and the upper surface of the flange portions 21b and 21c of the bobbin 21 are in contact with the bobbin contact surface 3d. Specifically, the entire upper surfaces of the flange portions 20b and 20c and the entire upper surfaces of the flange portions 21b and 21c are in contact with the bobbin contact surface 3d. The bobbin contact surface 3d of this embodiment is an excitation side bobbin contact surface with which the bobbin 20 contacts in the vertical direction and a detection side bobbin contact surface with which the bobbin 21 contacts in the vertical direction.

  The core support surface 3e is formed in a planar shape perpendicular to the vertical direction. The core support surface 3e is formed below the bobbin contact surface 3d, and is formed on the outer peripheral side of the case body 3 relative to the bobbin contact surface 3d. The core when viewed from below. The shape of the support surface 3e is an elongated square ring surrounding the bobbin contact surface 3d. As shown in FIG. 12, the core support surface 3 e includes a base portion 12 d of the first core 12, a base portion 13 d of the second core 13, a right end portion of the first connection core 14, and a left end of the second connection core 15. The side portion can come into contact.

  The substrate fixing surface 3f is formed in a planar shape perpendicular to the vertical direction. Further, the substrate fixing surface 3f is formed below the core support surface 3e and is formed on the outer peripheral side of the case body 3 relative to the core support surface 3e, and the substrate fixing surface when viewed from below. The shape of 3f is an elongated square ring surrounding the core support surface 3e. The outer peripheral side portion of the circuit board 6 is fixed to the board fixing surface 3f.

  The circuit board 6 is fixed to the board fixing surface 3f so that the thickness direction thereof coincides with the vertical direction. As shown in FIGS. 9 and 10, the circuit board 6 fixed to the board fixing surface 3f is annular. The lower surface of the core 11 is covered. When viewed in the vertical direction, the area of the circuit board 6 is larger than the area of the annular core 11, and the circuit board 6 covers substantially the entire lower surface of the annular core 11. Specifically, as shown in FIGS. 2 and 11, when viewed from above and below, the tip portions of the convex portions 12 a to 12 c and 13 a to 13 c are disposed in the passage hole 6 a, and the circuit board 6 covers the entire area of the lower surface of the annular core 11 excluding the tip portions of the convex portions 12a to 12c and 13a to 13c when viewed from the vertical direction.

  As shown in FIG. 12, four of the eight escape portions 3g are formed on the bobbin contact surface 3d, and the remaining four escape portions 3g are formed on the bobbin contact surface 3d and the core. It is formed at the boundary portion with the support surface 3e. The escape portion 3g is formed to be recessed upward.

  In this embodiment, the upper surfaces of the flange portions 20b and 20c of the bobbin 20 and the bobbin contact surface 3d abut, and the upper surfaces of the flange portions 21b and 21c of the bobbin 21 and the bobbin contact surface 3d abut, An annular core 11 around which the excitation coil 8 and the detection coils 9 and 10 are wound is positioned with respect to the case body 3 in the vertical direction. That is, in this embodiment, the bobbin 20, 21 and the bobbin contact surface 3d contact each other, whereby the annular core 11 around which the excitation coil 8 and the detection coils 9, 10 are wound is formed in the case body 3 in the vertical direction. Is positioned against. In addition, the outer peripheral side part of the annular core 11 is opposed to the core support surface 3e through a slight gap, or is in light contact with the core support surface 3e.

  The case body 3 is filled with a soft resin (not shown). That is, the space inside the case body 3 constituted by the cover member 7 and the case body 3 is filled with resin. Specifically, the resin is filled only in the space inside the case body 3 and above the circuit board 6. Alternatively, both the space above the circuit board 6 and the space below the circuit board 6 inside the case body 3 are filled with resin. This resin is filled to such an extent that the medal 2 can pass through the passage 5 and the passage holes 3c and 6a without any trouble.

(Main effects of this form)
As described above, in this embodiment, the upper surfaces of the flange portions 20b and 20c of the bobbin 20 are in contact with the bobbin contact surface 3d, and the upper surfaces of the flange portions 21b and 21c of the bobbin 21 are in contact with the bobbin contact surface 3d. , The annular core 11 around which the excitation coil 8 and the detection coils 9 and 10 are wound is positioned with respect to the case body 3 in the vertical direction, and the outer peripheral side portion of the annular core 11 is It faces the core support surface 3e with a slight gap, or is lightly in contact with the core support surface 3e. For this reason, in this embodiment, the annular core 11 is less likely to be affected by the thermal expansion of the case body 3 and the vibration of the case body 3 due to a change in ambient temperature.

  That is, when the annular core 11 is brought into direct contact with the case body 3 and the annular core 11 is positioned with respect to the case body 3, the influence of the thermal expansion of the case body 3, the influence of the vibration of the case body 3, etc. 11 is directly received, but in this embodiment, since the annular core 11 is positioned with respect to the case body 3 using the bobbins 20 and 21, the influence of the thermal expansion of the case body 3, the influence of the vibration of the case body 3, etc. Is difficult for the annular core 11 to receive. In particular, in this embodiment, since the annular core body 11 is formed in a flat plate shape with the vertical direction as the thickness direction, the annular core 11 is brought into direct contact with the case body 3 so that the annular core 11 is brought into contact with the case body 3. Positioning, the annular core 11 is easily deformed due to the thermal expansion of the case body 3 and the vibration of the case body 3. As a result, the thermal expansion of the case body 3, the vibration of the case body 3, etc. However, in this embodiment, the annular core 11 is not easily affected by the thermal expansion of the case body 3 or the vibration of the case body 3. Therefore, in this embodiment, the bobbin 20 or 21 is brought into contact with the bobbin abutting surface 3d of the case body 3 to suppress fluctuations in characteristics of the magnetic sensor 4 due to external factors such as temperature fluctuations. Is possible.

  In this embodiment, the outer peripheral side portion of the annular core 11 may come into light contact with the core support surface 3e. However, the base portion 12d of the first core 12, the base portion 13d of the second core 13, the right end portion of the first connection core 14, and the left end portion of the second connection core 15 affect the characteristics of the magnetic sensor 4. Even if these portions are slightly deformed, the characteristics of the magnetic sensor 4 are unlikely to fluctuate. Therefore, in this embodiment, even if the outer peripheral side portion of the annular core 11 is in light contact with the core support surface 3e, it is possible to suppress fluctuations in the characteristics of the magnetic sensor 4 due to external factors such as temperature fluctuations. .

  In this embodiment, the upper surfaces of the flange portions 20b and 20c arranged so as to sandwich the coil winding portion 20a in the front-rear direction and the bobbin abutting surface 3d abut, and the coil winding portion 21a is sandwiched in the front-rear direction. The annular core 11 is positioned with respect to the case body 3 in the vertical direction by the upper surfaces of the flange portions 21b and 21c disposed on the upper surface and the bobbin contact surface 3d contacting each other. Therefore, in this embodiment, the contact state between the bobbins 20 and 21 and the case body 3 can be stabilized.

  In this embodiment, the circuit board 6 fixed to the board fixing surface 3 f of the case body 3 covers the lower surface of the annular core 11. In this embodiment, the area of the circuit board 6 is larger than the area of the annular core 11 when viewed from above and below, and the circuit board 6 covers substantially the entire lower surface of the annular core 11. . Therefore, in this embodiment, the conductor pattern formed on the circuit board 6 can function as an electromagnetic shield below the annular core 11. Therefore, in this embodiment, even if an electromagnetic shield is not provided separately below the annular core 11, if electromagnetic shields are provided on the upper side of the annular core 11 and both the front, rear, left, and right sides of the annular core 11, external electromagnetic waves are provided. It is possible to suppress a decrease in the identification accuracy of the medal 2 due to. As a result, in this embodiment, even if it is possible to suppress a decrease in identification accuracy of the medal 2 due to external electromagnetic waves, the configuration of the medal identification device 1 can be simplified.

  In this embodiment, since the annular core 11 is formed in a flat plate shape and is arranged so that the thickness direction and the vertical direction coincide with each other, the front and rear left and right outer surfaces of the four side surfaces constituting the side surface portion 3b. While it is possible to reduce the size of the metal plate (that is, the electromagnetic shield) fixed to the base plate, it is necessary to provide a relatively large electromagnetic shield on the lower side of the annular core 11. However, in this embodiment, since the conductor pattern formed on the circuit board 6 can function as an electromagnetic shield, it is not necessary to separately provide a large electromagnetic shield below the annular core 11.

  In this embodiment, an exciting coil 8 and detection coils 9 and 10 are wound around an annular core 11 formed in a substantially square annular shape. Therefore, even if the medal identification device 1 is arranged in an external magnetic field that is oriented in an arbitrary direction in the XY plane composed of the X direction and the Y direction, the magnetic path caused by the external magnetic field is a passing path. 5 is not formed. For example, even if the medal identification device 1 is arranged in an external magnetic field (arrow in FIG. 13) in which the direction of the magnetic lines of force is directed backward, the magnetic path caused by the external magnetic field is as shown in FIG. The passage 5 is not formed. That is, in this embodiment, the annular core 11 can be caused to function as a magnetic shield, and as a result, it is possible to suppress a decrease in the identification accuracy of the medal 2 due to the external magnetic field of the medal identification device 1. Even if the medal identification device 1 is arranged in an external magnetic field that faces in the up-down direction (Z direction), the up-down direction is orthogonal to the magnetic sensing direction of the detection coils 9, 10. The identification device 1 is not easily affected by an external magnetic field.

  In this embodiment, since the exciting coil 8 and the detecting coils 9 and 10 are wound around the annular core 11 formed in a substantially square annular shape, the magnetic flux generated by the exciting coil 8 is generated from the annular core 11. This makes it possible to reduce the leakage. Therefore, in this embodiment, an efficient magnetic circuit can be formed on the annular core 11.

  In this embodiment, the signal level of the coil output signal SG1 based on the output signal from the detection coil 9 varies depending on the influence of the material, thickness and outer diameter of the medal 2 passing through the passage 5 and The signal level of the coil output signal SG2 based on the output signal varies mainly due to the influence of the material and thickness of the medal 2 passing through the passage 5. Therefore, in this embodiment, it is possible to mainly identify the outer diameter of the medal 2 using the detection coil 9 and mainly identify the material and thickness of the medal 2 using the detection coil 10. Therefore, in this embodiment, it becomes possible to improve the identification accuracy of the medal 2.

  In this embodiment, a part of the front end side of the coil winding part 22a is arranged on the inner peripheral side of the coil winding part 21a, and a part of the front end side of the detection coil 10 and the detection coil 9 are front and rear. Arranged at the same position in the direction. Therefore, in this embodiment, it becomes possible to improve the identification accuracy of the medal 2. That is, when the detection coil 9 and the detection coil 10 are completely deviated in the front-rear direction, based on the output signal from the detection coil 9 output according to the type of the medal 2 passing through the passage 5. When the medal 2 is identified by the combination of the peak value P1 of the signal level of the coil output signal SG1 and the peak value P2 of the signal level of the coil output signal SG2 based on the output signal from the detection coil 10, there is a variation in this combination. There is a possibility that the identification accuracy when the medal 2 is identified using the peak values P1 and P2 may be reduced. On the other hand, when a part of the front end side of the detection coil 10 and the detection coil 9 are arranged at the same position in the front-rear direction in the front-rear direction, variations in combinations of the peak value P1 and the peak value P2 occur. Can be reduced. Therefore, in this embodiment, it becomes possible to improve the identification accuracy of the medal 2 using the peak values P1 and P2.

  In this embodiment, the front end surfaces 13e and 13f of the second core are arranged behind the front end surfaces 13g and 13h of the second core, and the rear end surface and the front end surfaces 13g and 13h of the flange portion 21c of the bobbin 21 , And when the rear end surface of the flange 22c of the bobbin 22 and the front end surfaces 13e, 13f of the second core 13 are in contact, the flange 22c is disposed behind the rear end surface of the bobbin 21. Has been. Therefore, in this embodiment, even if the coil winding portion 22a is disposed on the inner peripheral side of the bobbin 21, the terminal pin 25 attached to the flange portion 22c can be disposed in parallel with the vertical direction. It is possible to increase the degree of freedom of arrangement of the pins 25. In this embodiment, since the terminal pin 25 attached to the flange portion 22c can be disposed perpendicular to the circuit board 6 without contacting the bobbin 21, the detection coil 10 and the circuit board 6 are arranged. The configuration for electrical connection can be simplified.

  In this embodiment, the thickness of the flange portion 21 b of the bobbin 21 in the front-rear direction is thinner than the thickness of the flange portion 21 c in the front-rear direction, and the detection coil 9 is wound around the front end side of the bobbin 21. In this embodiment, the thickness of the flange portion 22b of the bobbin 22 in the front-rear direction is thinner than the thickness of the flange portion 22c in the front-rear direction, and the detection coil 10 is wound around the front end side of the bobbin 22. . That is, in this embodiment, the detection coils 9 and 10 are arranged at positions closer to the convex portions 12a to 12c of the first core 12 around which the excitation coil 8 is wound. Therefore, in this embodiment, it becomes possible to arrange the detection coils 9 and 10 at a location where the magnetic flux density in the magnetic field generated by the excitation coil 8 is high, and as a result, the identification accuracy of the medal 2 can be improved. It becomes possible.

  In this embodiment, the thickness of the flange 20b of the bobbin 20 in the front-rear direction is thinner than the thickness of the flange 20c in the front-rear direction, and the exciting coil 8 is wound around the rear end side of the bobbin 20. That is, in this embodiment, the exciting coil 8 is disposed at a position closer to the convex portions 13 a to 13 c of the second core 13. Therefore, in this embodiment, the magnetic path is suppressed from being short-circuited in the first core 12, and between the convex portion 12a and the convex portion 13a, between the convex portion 12b and the convex portion 13b, and the convex portion 12c. It becomes possible to increase the magnetic flux density between the projections 13c. As a result, in this embodiment, it becomes possible to improve the identification accuracy of the medal 2 passing through the passage 5 formed between the convex portions 12a to 12c and the convex portions 13a to 13c.

  In this embodiment, the annular core 11 is formed by a single metal plate formed by pressing, and the thickness of the annular core 11 is reduced. Therefore, in this embodiment, even when a plurality of medals 2 pass through the passage 5 continuously, a coil based on output signals from the detection coils 9 and 10 between the plurality of medals 2 that pass continuously. It is possible to increase the amount of decrease in the signal levels of the output signals SG1 and SG2. That is, as shown in FIG. 14A, when the annular core 11 is thick, as shown in FIG. 14B, the detection coil 9 is placed between a plurality of medals 2 that pass continuously. Although the amount of decrease in the signal level of the coil output signals SG1 and SG2 based on the output signals from 10 is small, as shown in FIG. 14C, when the annular core 11 is thin, FIG. As shown in D), it is possible to increase the amount of decrease in the signal levels of the coil output signals SG1 and SG2 based on the output signals from the detection coils 9 and 10 between a plurality of medals 2 that pass continuously. Become. Therefore, in this embodiment, even if a plurality of medals 2 pass through the passage 5 continuously, it is possible to appropriately identify the authenticity of each of the plurality of medals 2.

  In this embodiment, the case body 3 is filled with a soft resin. Therefore, in this embodiment, it is possible to improve the impact resistance and the like of the medal identification device 1.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, the bobbin abutting surface 3 d with which the upper surfaces of the bobbins 20 and 21 abut is formed inside the case body 3. In addition to this, for example, an excitation-side bobbin contact surface with which the upper surface of the bobbin 20 abuts and a detection-side bobbin contact surface with which the upper surface of the bobbin 21 abuts may be formed separately. In the embodiment described above, the bobbin contact surface with which the upper surface of the bobbin 22 contacts is not formed on the case body 3, but the bobbin contact surface with which the upper surface of the bobbin 22 contacts may be formed on the case body 3. .

  In the embodiment described above, the area of the circuit board 6 is larger than the area of the annular core 11 when viewed from the up-down direction. In addition to this, for example, when viewed from above and below, the area of the circuit board 6 may be equal to the area of the annular core 11 or may be smaller than the area of the annular core 11. Moreover, in the form mentioned above, although a part of the front end side of the coil winding part 22a is arrange | positioned at the inner peripheral side of the coil winding part 21a, all the coil winding parts 22a are the inside of the coil winding part 21a. It may be arranged on the circumferential side. Moreover, the whole coil winding part 22a may be arrange | positioned in the position shifted | deviated from the coil winding part 21a in the front-back direction.

  In the embodiment described above, the rear end surfaces 12e and 12f of the first core 12 are disposed in front of the rear end surfaces 12g and 12h. In addition, for example, the rear end surfaces 12e and 12f and the rear end surfaces 12g and 12h may be disposed at the same position in the front-rear direction. Similarly, in the above-described form, the front end surfaces 13e and 13f of the second core 13 are arranged behind the front end surfaces 13g and 13h, but the front end surfaces 13e and 13f and the front end surfaces 13g and 13h are front and rear. You may arrange | position in the same position in a direction.

  In the embodiment described above, the thickness in the front-rear direction of the flange 20b of the bobbin 20 is thinner than the thickness in the front-rear direction of the flange 20c. In addition, for example, the thickness in the front-rear direction of the flange part 20b may be the same as the thickness in the front-rear direction of the flange part 20c, or may be thicker than the thickness in the front-rear direction of the flange part 20c. Similarly, in the embodiment described above, the thickness in the front-rear direction of the flange portion 21b of the bobbin 21 is thinner than the thickness in the front-rear direction of the flange portion 21c, but the thickness in the front-rear direction of the flange portion 21b is It may be the same as the thickness in the front-rear direction of the portion 21c, or may be thicker than the thickness in the front-rear direction of the flange portion 21c. In the above-described embodiment, the thickness in the front-rear direction of the flange portion 22b of the bobbin 22 is thinner than the thickness in the front-rear direction of the flange portion 22c. It may be the same as the thickness in the front-rear direction of 22c, or may be thicker than the thickness in the front-rear direction of the flange 22c.

  In the form mentioned above, the 1st core 12, the 2nd core 13, the 1st connection core 14, and the 2nd connection core 15 are integrally formed. In addition, for example, at least one of the first core 12, the second core 13, the first connection core 14, and the second connection core 15 is formed separately, and the first core 12, the second core 13, The first connecting core 14 and the second connecting core 15 may be integrated. That is, the annular core 11 may not be formed integrally. Moreover, in the form mentioned above, although the annular core 11 is formed of one metal plate formed by press work, the annular core 11 includes, for example, a metal foil formed of a magnetic material and the metal foil. May be constituted by a thin resin reinforcing plate to which is attached.

  In the embodiment described above, the magnetic sensor 4 includes the annular core 11 formed in an annular shape. In addition, for example, the magnetic sensor 4 has a gap (cut) in at least one of the first core 12, the second core 13, the first connecting core 14, and the second connecting core 15 instead of the annular core 11. A core body formed with may be provided. In this case, the gap may be filled with a nonmagnetic material.

  In the form mentioned above, the convex parts 12a-12c are formed in the rectangular shape. In addition to this, for example, the convex portions 12a to 12c may be formed in a trapezoidal shape in which the width in the left-right direction becomes narrower or wider toward the rear side. Similarly, although the convex portions 13a to 13c are formed in a rectangular shape, the convex portions 13a to 13c may be formed in a trapezoidal shape whose width in the left-right direction becomes narrower or wider toward the front side. .

  In the embodiment described above, the first core 12 has the three convex portions 12a to 12c. In addition, for example, the number of convex portions formed on the first core 12 may be one or two, or may be four or more. Similarly, in the embodiment described above, the three convex portions 13a to 13c are formed on the second core 13, but the number of convex portions formed on the second core 13 is two or four or more. May be.

  In the embodiment described above, the annular core 11 is formed in a substantially square annular shape. In addition, for example, the annular core 11 may be formed in an annular shape, an elliptical shape, or an oval shape. Further, the annular core 11 may be formed in a polygonal ring other than the square ring. In the above-described embodiment, the magnetic sensor 4 includes the two detection coils 9 and 10. However, the magnetic sensor 4 may include one detection coil or three. It may be above. In this case, the convex part should just be formed in the 2nd core 13 according to the number of the coils for a detection.

  In the embodiment described above, the medal identification device 1 is mounted and used in a slot machine. In addition, for example, the medal identification device 1 may be used by being mounted on a medal purchase machine or a medal counting machine. Further, in the above-described embodiment, the embodiment of the coin-shaped detected object identifying device of the present invention is described by taking the medal identifying device 1 for identifying the medal 2 used in the slot machine as an example. The coin-shaped detected object identification device to which is applied may be, for example, a device for identifying other coin-shaped detected objects such as medals used in game machines. The medal purchase machine is a device for inserting cash and purchasing medals, and is installed between slot machines or at the hall entrance. The medal counter is a device for counting the number of medals collected from each slot machine. For example, one medal counting machine is installed for a predetermined number of slot machines (for example, each island is installed), and a plurality of slot machines constituting the island where the medal counting machines are installed. Count the number of medals 2 gathered. The medal counter is, for example, a collective central processing unit that further collects medals 2 collected for each island and counts the number. The medal counter is a device that counts the number of medals 2 in order to replace the medals 2 with prizes, for example.

1 Medal identification device (coin-like object identification device)
2 medals (detected object)
3 Case body 3d Bobbin contact surface (excitation side bobbin contact surface, detection side bobbin contact surface)
5 Passage 6 Circuit board 8 Excitation coil 9 Detection coil 10 Detection coil (second detection coil)
11 annular core (core body)
12 1st core 12a Convex part (4th convex part)
12b Convex part (fifth convex part)
12c Convex part (sixth convex part)
13 Second core 13a Convex part (first convex part)
13b Convex part (second convex part)
13c Convex part (third convex part)
13d Base 13e Front end face (base end face, third base end face)
13f front end face (base end face, fourth base end face)
13g front end face (base end face, first base end face)
13h front end face (base end face, second base end face)
14 1st connection core 15 2nd connection core 20 Bobbin (excitation side bobbin)
20a Coil winding part (excitation side coil winding part)
20b collar (first excitation side collar)
20c collar (second excitation side collar)
21 Bobbin (Detection side bobbin)
21a Coil winding part (detection side coil winding part)
21b collar (first detection side collar)
21c collar (second detection side collar)
22 bobbin (second detection side bobbin)
22a Coil winding part (second detection side coil winding part)
22b collar (third detection side collar)
22c collar (fourth detection side collar)
23 Terminal pin (Excitation side terminal pin)
24 terminal pin (first terminal pin)
25 Terminal pin (second terminal pin)
X orthogonal direction X1 3rd direction X2 4th direction Y thickness direction of detected body Y1 1st direction Y2 second direction Z passing direction of detected body

Claims (14)

A passing path through which the coin-shaped detection object passes is formed inside, and an excitation coil and a detection coil, an excitation side bobbin around which the excitation coil is wound, and the detection coil are wound. A detection-side bobbin, a core body around which the excitation coil is wound via the excitation-side bobbin and the detection coil is wound via the detection-side bobbin, the excitation coil, and the detection A case body in which the core body around which the coil for winding is wound is housed,
The case body includes an excitation-side bobbin contact surface that contacts the excitation-side bobbin in the passing direction of the detected body, and a detection-side bobbin contact surface that contacts the detection-side bobbin in the passing direction of the detected body. Formed,
When the excitation side bobbin and the excitation side bobbin contact surface are in contact with each other, and the detection side bobbin and the detection side bobbin contact surface are in contact, the excitation coil and the detection coil are wound. The coin-shaped detected object identifying device, wherein the core body is positioned with respect to the case body in a passing direction of the detected object.   2. The coin-shaped detected object identification device according to claim 1, wherein the core body is formed in a flat plate shape whose thickness direction is a passing direction of the detected object. When one of the thickness directions of the detected object passing through the passage is a first direction, and the other of the thickness directions of the detected object passing through the passage is a second direction,
The excitation side bobbin is formed so as to be connected to an excitation side coil winding part around which the excitation coil is wound and an end of the excitation side coil winding part in the second direction. A first excitation side flange that extends, and a second excitation side flange that is formed to be connected to the first direction end of the excitation side coil winding portion and extends to the outer peripheral side of the excitation side bobbin,
The detection-side bobbin is formed so as to be connected to a detection-side coil winding portion around which the detection coil is wound, and an end in the first direction of the detection-side coil winding portion, toward the outer peripheral side of the detection-side bobbin A first detection side flange that spreads, and a second detection side flange that is formed to be connected to the second direction end of the detection side coil winding part and extends to the outer peripheral side of the detection side bobbin,
The first excitation side flange and the second excitation side flange are in contact with the excitation side bobbin contact surface, and the first detection side flange and the second detection side flange are in contact with the detection. The core body around which the excitation coil and the detection coil are wound is positioned with respect to the case body in the passing direction of the detected body by contacting the side bobbin contact surface. The coin-shaped detected object identification device according to claim 1 or 2. A circuit board disposed inside the case body and electrically connected to the excitation coil and the detection coil;
4. The coin-shaped detected object identification device according to claim 1, wherein the circuit board covers one surface of the core body in a passing direction of the detected object. 5. When viewed from the passing direction of the detected object, the area of the circuit board is larger than the area of the core body,
5. The coin-shaped detected object identification device according to claim 4, wherein the circuit board covers substantially the entire area of the core body.   6. The coin-shaped detected object identification device according to claim 1, wherein the case body is filled with resin. In addition to the detection coil, a second detection coil is provided,
One of the thickness directions of the detected body passing through the passage is defined as a first direction, the other of the thickness directions of the detected body passing through the passage is defined as a second direction, and the passing direction of the detected body When the direction orthogonal to the thickness direction of the detected object is an orthogonal direction, one of the orthogonal directions is a third direction, and the other of the orthogonal directions is a fourth direction,
The core body is disposed on the first direction side and the first coil around which the exciting coil is wound, and the core body is disposed on the second direction side and on which the detection coil and the second detection coil are wound. A second core,
The second core is disposed on the end side in the third direction of the passage, and protrudes toward the first core. The first core is disposed on the end side in the fourth direction of the passage. A second convex portion projecting toward the core, a third convex portion disposed between the first convex portion and the second convex portion and projecting toward the first core, and the first convex portion The coin-shaped detected object identification device according to claim 1, further comprising: a base end, a base end of the second convex portion, and a base portion connected to the base end of the third convex portion. A second detection-side bobbin around which the second detection coil is wound;
The detection-side bobbin includes a detection-side coil winding portion around which the detection coil is wound,
The second detection-side bobbin includes a second detection-side coil winding portion around which the second detection coil is wound,
The first convex portion, the second convex portion, and the third convex portion are disposed on the inner peripheral side of the detection-side bobbin, and the third convex portion is disposed on the inner peripheral side of the second detection-side bobbin. Is placed,
The coin-shaped detected object identification device according to claim 7, wherein at least a part of the second detection-side coil winding portion is disposed on an inner peripheral side of the detection-side coil winding portion. The detection coil is wound in a cylindrical shape so that the first convex portion, the second convex portion, and the third convex portion are arranged on the inner peripheral side thereof,
The second detection coil is wound in a cylindrical shape so that the third convex portion is disposed on the inner peripheral side thereof,
The end face of the base portion in the first direction is a base end face, the base end face is the third direction end face of the first convex portion than the third direction end face, and the base end face is the base end face. The fourth direction side of the second convex portion is set to be the second base end surface, and the base end surface has a third base portion between the first convex portion and the third convex portion. When the end surface is a fourth base end surface between the second convex portion and the third convex portion of the base end surface,
The first base end face and the second base end face are arranged at the same position in the thickness direction of the detected body, and the third base end face and the fourth base end face are in the thickness direction of the detected body. The third base end surface and the fourth base end surface are disposed at the same position, and are disposed closer to the second direction than the first base end surface and the second base end surface. Item 9. The coin-shaped object identification device according to Item 7 or 8. A second detection-side bobbin around which the second detection coil is wound;
The detection-side bobbin is formed so as to be connected to a detection-side coil winding portion around which the detection coil is wound, and an end in the first direction of the detection-side coil winding portion, toward the outer peripheral side of the detection-side bobbin A first detection side flange that spreads, and a second detection side flange that is formed to be connected to the second direction end of the detection side coil winding part and extends to the outer peripheral side of the detection side bobbin,
The second detection-side bobbin is formed to be connected to a second detection-side coil winding portion around which the second detection coil is wound, and to the first direction end of the second detection-side coil winding portion. To the outer peripheral side of the second detection side bobbin formed to be connected to the third detection side flange extending to the outer peripheral side of the second detection side bobbin and the second direction end of the second detection side coil winding part. A fourth detection side collar that spreads;
The thickness of the first detection side collar in the thickness direction of the detection object is thinner than the thickness of the second detection side collar in the thickness direction of the detection object,
The thickness of the third detection side collar in the thickness direction of the detected object is thinner than the thickness of the fourth detection side collar in the thickness direction of the detected object. The coin-shaped to-be-detected object identification device in any one of 9-9. A second detection-side bobbin around which the second detection coil is wound, two first terminal pins to which both ends of the detection coil are connected, and both ends of the second detection coil And two second terminal pins connected to each other,
The detection coil is wound on the first direction side of the detection side bobbin, and the first terminal pin is attached to the second direction side of the detection side bobbin,
The second detection coil is wound around the first direction side of the second detection side bobbin, and the second terminal pin is attached to the second direction side of the second detection side bobbin. The coin-shaped detected object identification device according to any one of claims 7 to 10. Comprising two excitation side terminal pins to which both ends of the excitation coil are connected;
The first core is disposed on the end side in the third direction of the passage, and protrudes toward the first protrusion. The first core is disposed on the end of the passage direction in the fourth direction. A fifth convex portion projecting toward the second convex portion, and a sixth convex portion disposed between the fourth convex portion and the fifth convex portion and projecting toward the third convex portion,
The fourth convex portion, the fifth convex portion and the sixth convex portion are arranged on the inner peripheral side of the excitation side bobbin,
The excitation coil is wound around the second direction side of the excitation side bobbin, and the excitation side terminal pin is attached to the first direction side of the excitation side bobbin. 11. A coin-shaped detected object identifying device according to any one of 11 above.   The said core body is comprised with the metal plate of 1 sheet formed by press work, and is arrange | positioned so that the passage direction of the said to-be-detected body may turn into the thickness direction. The coin-shaped to-be-detected body identification apparatus in any one. When the direction orthogonal to the passing direction of the detected object and the thickness direction of the detected object is an orthogonal direction, one of the orthogonal directions is a third direction, and the other of the orthogonal directions is a fourth direction,
The core body includes the first core, the second core, and a first connecting core that connects an end portion of the first core in the third direction and an end portion of the second core in the third direction. The first core is formed in an annular shape having a second connecting core that connects an end portion in the fourth direction of the first core and an end portion in the fourth direction of the second core. 14. The coin-shaped detected object identifying device according to any one of items 13 to 13.

Images