JP5707976B2 - Game ball detection switch and game machine - Google Patents

Description

  The present invention relates to a game ball detection switch and a game machine, and in particular, it can detect a low-frequency near electromagnetic field that causes a malfunction in detection of a game ball passing in the game machine, and reduce malfunction in the game ball pass detection. The present invention relates to a gaming ball detection switch and a gaming machine.

  A pachinko gaming machine is equipped with a plurality of game ball detection switches for detecting the passage of a game ball, and outputs a detection signal to the control device when the game ball passes through a main winning opening or gate.

  The mainstream is a DC 2-wire proximity switch that detects a metal ball without contact, so it has excellent durability, and the 2-wire unique open / close operation has the same image as a reed switch. Many overwhelm other principles.

  However, fraudulent acts have been perceived because of the electronic circuit that has been a potential weak point.

  In the past, there have been cases of intentionally radiating radio waves using transceivers and mobile phones. Recently, relatively low-frequency AC noise, so-called low-frequency near electromagnetic fields, are generated, and the game ball detection switch oscillates. Examples of inducing circuit malfunctions are known.

  As a countermeasure, a technique has been proposed in which a near electromagnetic field detection sensor is installed for each gaming machine and the arrival of a near electromagnetic field is detected before the gaming ball detection switch oscillation circuit causes a malfunction.

  As this technique, for example, there is a game ball detection switch, which has substantially the same configuration, the same circuit, and a stationary oscillation stop setting as a near electromagnetic field detection sensor (see Patent Document 1).

  In other words, the oscillation circuit built in this example matches the LC resonance frequency, sets the electromagnetic field detection sensitivity more sensitively than the game ball detection switch used together by operating the opening area of the coil shield material, and is irradiated with electromagnetic waves. Even before the game ball detection switch falls into a functional disorder, it can be recognized.

JP 2010-268418 A

  However, when the game ball detection switch of Patent Document 1 and the nearby electromagnetic field detection sensor are used in combination, the conditions of the installation positions of both are severe, and the installation position is restricted.

  For example, if the game ball detection switch and the nearby electromagnetic field detection sensor are too far apart, the electromagnetic field detection sensor is undetected if irradiation is performed with a relatively small improper coil excitation, with the nearby electromagnetic field generation region being focused. Nevertheless, only the game ball detection switch may be caused to malfunction, resulting in malfunction.

  On the other hand, if the game ball detection switch and the nearby electromagnetic field detection sensor are too close, the detection sensor may malfunction due to the influence of the oscillation wave of the game ball detection switch. Patent Document 1 discloses an invention in which both types are integrated. However, there is no doubt that the same oscillating wave has an adverse effect, and a change in the game ball detection state of the game ball detection switch follows the nearby electromagnetic wave. There is a problem that the field detection sensitivity changes remarkably or a malfunction is always generated when the game ball is not detected.

  The present invention has been made in view of such a situation, and the low-frequency near electromagnetic field is generated at the timing before the malfunction of the game ball detection switch is caused by the low-frequency near electromagnetic field generated inside the pachinko gaming machine. By making it possible to detect, it is possible to appropriately monitor the low-frequency near electromagnetic field and to suppress the functional failure of the game ball detection switch.

  The gaming ball detection switch according to one aspect of the present invention includes a first coil wound around a through hole and the first coil, and an oscillation state changes when the game ball passes through the through hole. A second oscillation circuit including a first oscillation circuit, a second coil for detecting the arrival of an electromagnetic field in the vicinity of a low frequency by voltage induction, and the second coil, wherein the oscillation state changes by the voltage induction; A game ball detection switch including a circuit, wherein the second coil is arranged such that a magnetic flux generation direction of the second coil coincides with a magnetic flux generation direction of the first coil.

  It is possible to further include a shield member that covers the outer peripheral portion of the first coil and opens the inner wall portion of the through hole.

  The second coil has a central rod axis of a magnetic body, is orthogonal to the end surface of the through hole, and is arranged such that one end surface of the central rod axis is disposed on substantially the same plane. it can.

  A first output circuit that outputs a first state signal in response to an oscillation state change in the first oscillation circuit, and a second state signal in response to an oscillation state change in the second oscillation circuit A second output circuit that further includes the first output signal and the second output circuit, the first state signal and the second state signal, or Any one of them can be directly output to the control device, or can be output to the control device via an interface circuit.

  The first output circuit and the second output circuit may further include a combined output circuit, and the combined output circuit includes the first state signal and the first output signal. A combined output signal of the two state signals can be directly output to the control device, or can be output to the control device via the interface circuit.

  The first state signal may include a game ball detection signal indicating a situation in which a game ball has passed through the through hole and a game ball non-detection signal indicating a situation in which the game ball has not passed, The second state signal includes an electromagnetic field detection signal indicating the arrival of a low-frequency near electromagnetic field and an electromagnetic field non-detection signal indicating that the low-frequency near electromagnetic field does not arrive. A first output signal indicating a game ball detection state in an environment where the low-frequency near electromagnetic field has not arrived, and an environment in which the low-frequency near electromagnetic field has not arrived. And a third output signal indicating the arrival of the low-frequency near electromagnetic field in an environment where the low-frequency near electromagnetic field has arrived. Can be.

  An oscillation suppression circuit that suppresses or stops the oscillation state of the first oscillation circuit can be further included. When the electromagnetic field detection signal is output to the second output circuit, the oscillation is suppressed. The suppression circuit can be operated to suppress or stop the oscillation state of the first oscillation circuit.

  The composite output circuit switches between three voltage values assigned to the lowest potential as the second output signal, the highest potential as the first output signal, and the intermediate potential as the third output signal. It can be made to output.

  The first output circuit may be a direct current 2-wire output system and may further include a current increasing device, and the second output circuit outputs the electromagnetic field detection signal. The current increasing device may be operated to increase the current consumed by the game ball detection switch.

  A gaming ball detection system according to the present invention is a gaming ball detection system in which one or a plurality of gaming ball detection switches according to claim 8 or 9 are connected to the interface circuit, wherein the interface circuit has a low level inversion. Between the potential and the ground potential, the second output signal is between the high level inversion potential and the power supply potential of the interface circuit, and the first output signal is between the low level inversion potential and the high level inversion potential. In the middle, the third output signal is set.

  The pachinko gaming machine according to the present invention includes at least one of the game ball detection switch according to claims 1 to 9 and the game ball detection system according to claim 10, or a plurality thereof.

  In the gaming ball detection switch according to one aspect of the present invention, the first coil is wound around the through hole, and the gaming ball passes through the through hole by the first oscillation circuit including the first coil. In this case, the oscillation state changes, the arrival of the low-frequency near electromagnetic field is detected by voltage induction by the second coil, and the second oscillation circuit including the second coil oscillates by voltage induction. The state changes, and the second coil is arranged so that the magnetic flux generation direction of the second coil coincides with the magnetic flux generation direction of the first coil.

  In the gaming ball detection switch according to one aspect of the present invention, the first coil wound around the through hole is, for example, a coil of a gaming ball detection unit, includes the first coil, and is included in the through hole. The first oscillation circuit whose oscillation state changes when the game ball passes is, for example, an oscillation circuit of a game ball detection unit, and a second oscillation circuit that detects the arrival of an electromagnetic field in the vicinity of a low frequency by voltage induction. The coil is, for example, a coil of an abnormality detection unit, includes the second coil, and the second oscillation circuit whose oscillation state changes due to the induction of the voltage is, for example, an oscillation circuit of the abnormality detection unit. The second coil is arranged such that the magnetic flux generation direction of the second coil coincides with the magnetic flux generation direction of the first coil.

  That is, the second coil is arranged so that the magnetic flux generation direction of the second coil coincides with the magnetic flux generation direction of the first coil, so that the first ball constituting the game ball detection unit is configured. When a malfunction occurs due to the arrival of an electromagnetic field in the vicinity of a low frequency, the arrival of an electromagnetic field in the vicinity of a low frequency is detected by the second coil that constitutes the anomaly detection unit. It becomes possible to suppress malfunction of the game ball detection unit.

  According to the present invention, in detecting the passage of a game ball, it is possible to suppress malfunction caused by the approach of a low-frequency near electromagnetic field, and it is possible to suppress fraud against a gaming machine.

It is a figure explaining the structural example of the game ball detection switch to which this invention is applied. It is an external appearance perspective view of the game ball detection switch of FIG. It is an exploded view of the game ball detection switch of FIG. It is a perspective view of the back direction of the board | substrate of the game ball detection switch of FIG. It is a figure explaining the example of arrangement | positioning of each coil of the game ball detection part and abnormality detection part in the game ball detection switch of FIG. It is a time chart explaining operation | movement of the conventional game ball detection switch. It is a time chart explaining operation | movement of the game ball detection switch of FIG. It is a flowchart explaining the game ball detection process by the game ball detection switch of FIG. It is a figure explaining the structural example of the game machine using the game ball detection switch of FIG. It is a figure explaining the relationship between the output signal of the game ball detection switch in the gaming machine of FIG. 9 and the operation threshold value of the interface circuit. 10 is a time chart for explaining the operation of the game ball detection switch and the interface circuit of the gaming machine of FIG. 9; It is a figure explaining the other structural example of the game machine using another game ball detection switch. It is a figure explaining the other example of arrangement | positioning of each coil of the game ball detection part and abnormality detection part in a game ball detection switch. It is a figure explaining the further other example of arrangement | positioning of each coil of the game ball detection part and abnormality detection part in a game ball detection switch.

  Embodiments of the present invention will be described below. Correspondences between the configuration requirements of the present invention and the embodiments described in the detailed description of the present invention are exemplified as follows. This description is to confirm that the embodiments supporting the present invention are described in the detailed description of the invention. Accordingly, although there are embodiments that are described in the detailed description of the invention but are not described here as embodiments corresponding to the constituent elements of the present invention, It does not mean that the embodiment does not correspond to the configuration requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  That is, the gaming ball detection switch (for example, the gaming ball detection switch 1 in FIG. 1) of one aspect of the present invention includes a first coil (for example, the coil L12 in FIG. 1) wound around the through-hole, When a game ball passes through the through-hole including the first coil, the first oscillation circuit whose oscillation state changes (for example, the oscillation circuit 111 in FIG. 1) and the arrival of the low-frequency near electromagnetic field are A second coil (for example, the coil L11 in FIG. 1) that is detected by the induction of the second oscillation circuit, and a second oscillation circuit that changes the oscillation state by the induction of the voltage (for example, the oscillation in FIG. 1). The second coil is arranged so that the magnetic flux generation direction of the second coil coincides with the magnetic flux generation direction of the first coil. (For example, as shown in FIG. Uni coils L11, L12 are arranged).

  Shield members (for example, shield members 1b and 1d in FIG. 3) that include the outer peripheral portion of the first coil and that open the inner wall of the through hole can be further included.

  In response to a change in the oscillation state of the first oscillation circuit, a first output circuit (for example, the comparator COM2 in FIG. 1) that outputs a first state signal and a change in the oscillation state of the second oscillation circuit. In response, a second output circuit (eg, the comparator COM1 of FIG. 1) that outputs a second status signal may be further included, the first output circuit, and the second output. The circuit may be configured to output the first state signal and / or the second state signal directly to the control device, or to output the control device via the interface circuit. .

  A composite output circuit (for example, the diodes D1 and D2 and the resistor R3 in FIG. 1) may be further included in the subsequent stage of the first output circuit and the second output circuit. The output circuit causes the control device to output a combined output signal of the first state signal and the second state signal, or causes the control device to output the output signal via the interface circuit. Can be.

  An oscillation suppression circuit (for example, the diode D1 in FIG. 1) that suppresses or stops the oscillation state of the first oscillation circuit can be further included, and the second output circuit includes the electromagnetic field. When outputting the detection signal, the oscillation suppression circuit can be operated to suppress or stop the oscillation state of the first oscillation circuit.

  The first output circuit may be a direct current 2-wire output system and may further include a current increasing device (for example, the constant voltage circuit 113 and the resistor R3 in FIG. 1). When outputting the electromagnetic field detection signal, the output circuit can operate the current increasing device to increase the current consumed by the game ball detection switch.

Hereinafter, the best mode for carrying out the invention (hereinafter referred to as an embodiment) will be described. The description will be given in the following order.
1. First embodiment (example of 2-wire output system)
2. Second Embodiment (Example of 4-wire output system)

<1. First Embodiment>
[Configuration Example of Game Ball Detection Switch to which the Present Invention is Applied]
FIG. 1 shows a configuration example of a direct current two-wire game ball detection switch that detects the passage of a game ball and incorporates an abnormality detection unit including a low-frequency near electromagnetic field sensor to which the present invention is applied. That is, in a pachinko gaming machine (hereinafter simply referred to as a gaming machine), when a game ball is launched, the counting is performed by, for example, being thrown into or out of a chucker called a so-called tulip. Needed.

  The game ball detection switch 1 of FIG. 1 has a configuration as shown in FIGS. 2 to 5, for example, and is provided with a through hole H having the same diameter as the game ball 2. Here, FIG. 2 is a perspective view of the game ball detection switch 1, FIG. 3 is an exploded view, and FIG. 4 shows that the shield members 1b and 1d are mounted on the board 1c of the game ball detection switch 1. It is a state, Comprising: The structure of the back surface in the state of FIG. 2 is shown. FIG. 5 is a side view when the shield member 1b, the coil spool 1g, the substrate 1c, and the shield member 1d are combined. In FIG. 2, only the cover 1e of the game ball detection switch 1 is illustrated as being disassembled.

  As shown in FIG. 3, the game ball detection switch 1 is composed of a case 1a, a shield member 1b, a substrate 1c press-fitted with a resin coil spool 1g, a shield member 1d, and a cover 1e from the bottom in the figure. ing. A coil L12 for detecting the passage of the game ball 2 is wound around the outer periphery of the coil spool 1g. On the other hand, the coil L11 for detecting the low frequency near electromagnetic field is mounted on the substrate 1c. As shown in the figure, a coil wire is wound around a central axis 1x of a magnetic material. In this case, the coil L11 has the capability of concentrating the magnetic flux on the central axis 1x, and is generated in the direction perpendicular to the substrate 1c as shown in FIG. On the other hand, in the coil L12, magnetic flux is generated in the vertical direction of the penetrating portion H because almost all portions other than the inner circumferential direction of the coil spool are covered with the shield members 1b and 1d. As a result, the two coils L11 and L12 both generate magnetic fluxes in the same direction as indicated by arrows in FIG.

  With such a configuration, when the game ball 2 passes through the through-hole H, the game ball detection switch 1 detects the passage of the game ball 2 by a change in magnetic flux generated by the coil L12. In addition, when a low-frequency near electromagnetic field arrives, the game ball detection switch 1 detects this by a change in magnetic flux generated by the coil L11. Therefore, the game ball detection switch 1 detects whether or not the game ball has passed unless an arrival of a low-frequency near electromagnetic field is detected, and outputs a corresponding detection signal as an output signal of Hi level or Low level. When a low frequency induction electromagnetic field arrives, the intermediate potential is output.

  Here, returning to the description of FIG. 1, the detailed configuration of the game ball detection switch will be described.

  The game ball detection switch 1 includes an abnormality detection unit 11 and a game ball detection unit 12. The abnormality detection unit 11 detects the arrival of a low-frequency near electromagnetic field based on a change in magnetic flux generated by the coil L11 and outputs a corresponding signal. The game ball detector 12 detects whether or not the game ball 2 has passed based on a change in magnetic flux generated by the coil L12. The game ball detection switch 1 outputs a signal indicating whether or not a game ball has passed and a signal indicating the occurrence of a low-frequency near electromagnetic field based on the output results of the abnormality detection unit 11 and the game ball detection unit 12 as an output terminal Vout Output more. In FIG. 1, the resistor R <b> 3 is described as belonging to the abnormality detection unit 11, and the diodes D <b> 1 and D <b> 2 belong to the game ball detection unit 12. However, these constitute a synthesis circuit that synthesizes the output signals of the abnormality detection unit 11 and the game ball detection unit 12 and do not belong to any of them. Details of this point will be described later.

  The abnormality detection unit 11 includes a coil L11 that functions as an antenna, a capacitor C11, an oscillation circuit 101, a detection integration circuit 102, and a comparator COM1 that is an output circuit. Detects the electromagnetic field and outputs the detection result. More specifically, both ends of the capacitor C11 are connected in parallel with the coil L11 to form a resonance circuit 41. Furthermore, the upper ends of the coil L11 and the capacitor C11 are connected to the oscillation circuit 101, and generate an output signal V2 composed of an LC resonance wave when an electromagnetic field in the vicinity of the low frequency arrives. The lower end is grounded. The oscillation circuit 101 is grounded while being supplied with power by the constant voltage circuit 113, and is further grounded via the sensitivity adjustment resistor R1, and outputs the output signal V4 to the detection integration circuit 102. The detection integration circuit 102 is supplied with power from the constant voltage circuit 113 and is grounded, integrates the oscillation output supplied from the oscillation circuit 101, and supplies the output signal V6 to the comparator COM1, which is an output circuit. At this time, the output voltage of the detection integration circuit 102 is smoothed by the capacitor C13 and supplied to the comparator COM1. The comparator COM1 compares the input output voltage from the detection integration circuit 102 with a predetermined threshold value, and outputs the comparison result as an output signal V8 that is a detection result of the low-frequency near electromagnetic field.

  In addition, the oscillation circuit 101 is set to an oscillation stop state in a normal state, and is set to shift to an oscillation state only when the coil L11 is exposed to a low-frequency near electromagnetic field. More specifically, the conductance gL1 of the resonance circuit 41 including the coil L11 and the capacitor C11 and the conductance gi1 of the oscillation circuit 101 are based on the Nyquist oscillation condition, and in the case of the following equation (1), the oscillation circuit 101 Is in an oscillation stop state, and in the case of Equation (2), the oscillation circuit 101 is always in an oscillation state.

gL1> gi1
... (1)

gL1 <gi1
... (2)

  Therefore, if the resistance value of the sensitivity adjustment resistor R1 is adjusted so that the conductance gi1 of the oscillation circuit 101 is smaller than the conductance gL1 of the resonance circuit 41, that is, if the sensitivity adjustment resistor R1 is set larger, the oscillation circuit 101 The conductance gi1 is set to a small value. As a result, since the relationship of the above-described formula (1) can be maintained, in a state where the coil L11 is not exposed to the low-frequency near electromagnetic field, the oscillation circuit 101 is in the oscillation stop state, and the output signal thereof V4 is input to the detection integration circuit 102 and integrated by the integration capacitor C13. At this time, since the oscillation circuit 101 does not perform the oscillation operation, the output signal V6 of the detection integration circuit 102 becomes 0 V (Low level), and a value smaller than the threshold value Vth1 is supplied to the comparator COM1. Therefore, the output signal V8 of the comparator COM1 outputs a signal of Hi level (the output voltage Vref of the constant voltage circuit 113) as a signal indicating that the oscillation operation is not performed.

  On the other hand, the coil L11 induces a sine wave voltage by being exposed to a low-frequency near electromagnetic field. At this time, in the vicinity of the resonance point of the resonance circuit 41, the conductance gL1 decreases and shifts from the state of the equation (1) to the state of the equation (2), so that the oscillation circuit 101 starts steady oscillation, The oscillation output is output to the detection integration circuit 102. At this time, since the oscillation circuit 101 performs an oscillation operation, the output signal V6 of the detection integration circuit 102 becomes Vref (Hi level) that is the output voltage of the constant voltage circuit 113, and the comparator COM1 has a threshold Vth1. Therefore, the output signal V8 of the comparator COM1 outputs a Low level signal as a signal indicating that the oscillation operation is performed.

  The game ball detection unit 12 is configured in substantially the same manner as the abnormality detection unit 11, and includes a coil L12, a capacitor C12, an oscillation circuit 111, a detection integration circuit 112, a comparator COM2 that is an output circuit, and a constant voltage. The circuit 113 and the Zener diode ZD are configured to detect passage of the game ball 2 based on a signal from the coil L12 and output a detection result. More specifically, both ends of the capacitor C12 are connected in parallel with the coil L12 to constitute the resonance circuit 42. Furthermore, the capacitor C12 and the upper end of the coil L12 are connected to the oscillation circuit 111, and generate an output signal V1 composed of an LC resonance wave when the game ball 2 is not passing through. The lower end is grounded. The oscillation circuit 111 is supplied with power from the constant voltage circuit 113 and is grounded. Further, the oscillation circuit 111 is grounded via the sensitivity adjustment resistor R2, and outputs an oscillation output to the detection integration circuit 112 as an output signal V3. . The detection integration circuit 112 is supplied with power from the constant voltage circuit 113 and is grounded. The detection integration circuit 112 integrates the oscillation output supplied from the oscillation circuit 111 and supplies it as an output signal V5 to the comparator COM2, which is an output circuit. At this time, the output signal V5 of the detection integration circuit 112 is smoothed by the capacitor C14 and supplied to the comparator COM2. The comparator COM2 compares the input output voltage from the detection integration circuit 112 with a predetermined threshold value Vth2, detects the passage of the game ball 2 based on the comparison result, and outputs the detection result as an output signal V7. .

  The oscillation circuit 111 is set to be in an oscillation stop state when the game ball 2 is in the passing state, and is set to shift to the oscillation state only when the game ball 2 is not passing through. More specifically, the conductance gL2 of the resonance circuit 42 including the coil L12 and the capacitor C12 and the conductance gi2 of the oscillation circuit 111 are based on the Nyquist oscillation condition and in the case of the following expression (3), the oscillation circuit 111 is in an oscillation stop state, and in the case of Equation (4), the oscillation circuit 111 is always in an oscillation state.

gL2> gi2
... (3)

gL2 <gi2
... (4)

  Therefore, if the resistance value of the sensitivity adjustment resistor R2 is adjusted so that the conductance gi2 of the oscillation circuit 111 is smaller than the conductance gL2 of the resonance circuit 42, that is, if the sensitivity adjustment resistor R2 is set to be smaller, the oscillation circuit 111 The conductance gi2 is set to a larger value. As a result, the relationship of the above formula (4) can be maintained, so that the oscillation circuit 111 is always in an oscillation state when the game ball 2 is not passing through. At this time, since the oscillation circuit 111 performs an oscillation operation, the output signal V5 of the detection integration circuit 112 becomes the output voltage Vref (Hi level) of the constant voltage circuit 113, and the comparator COM2 has a value larger than the threshold value Vth2. A value is supplied, and the output signal V7 of the comparator COM2 outputs a Low signal as a signal indicating that the game ball 2 has not passed.

  On the other hand, in the coil L12, the conductance gL2 is increased by passing the game ball 2, and the state of the equation (4) is changed to the state of the equation (3), so that the oscillation circuit 111 stops oscillation. Then, the oscillation output is output to the detection integration circuit 112. At this time, since the oscillation circuit 111 is not oscillating, the output signal V5 of the detection integration circuit 112 is 0 V (Low level), and a value smaller than the threshold value Vth2 is supplied to the comparator COM2. Therefore, the output signal V7 of the comparator COM2 outputs a Hi level signal as a signal indicating that the game ball is passing.

  The Zener diode ZD is opened and closed by the output signal V7 of the comparator COM2. For example, when the passage of the game ball 2 is detected, that is, when the output signal V7 of the comparator COM2 is a Hi level signal, the Zener diode ZD is opened and the minimum current is passed through the constant voltage circuit 113. Into the leakage current mode. On the other hand, when the passage of the game ball 2 is not detected, that is, when the output signal V7 of the comparator COM2 is a low level signal, the Zener diode ZD is in a closed state, and the voltage generated across the Zener diode ZD. And the output voltage Vout changes to the potential across the Zener diode ZD.

  The diode D1 has an anode connected to the upper end of the resonance circuit 42 and a cathode connected to the output terminal of the comparator COM1. The diode D2 has an anode connected to the output terminal of the detection integration circuit 112 and a cathode connected to the output terminal of the comparator COM1. The resistor R3 has one end connected to the constant voltage circuit 113 and the other end connected to the output terminal of the comparator COM1. The diodes D1 and D2 and the resistor R3 function as a signal synthesis circuit for output signals of the abnormality detection unit 11 and the game ball detection unit 12.

  That is, when the low-frequency near electromagnetic field has not arrived, the output signal V6 of the detection integration circuit 102 is a low level signal, and therefore, the comparator COM1 has a value smaller than the threshold value Vth1, so that the comparator The output signal V8 of COM1 becomes Hi level (Vref), and the diodes D1 and D2 are both reverse-biased nonconductive. However, as the low-frequency near electromagnetic field arrives and the output signal V8 of the comparator COM1 becomes 0V, the output signal V1 that is the oscillation amplitude of the resonance circuit 42 and the output signal V5 of the detection integration circuit 112 are changed. Simultaneously, the circuit is forcibly shunted, the constant voltage output Vref is applied to both ends of the resistor R3, and the generated current (Vref / R3) is added to the leakage current value IL0.

[Description of Operation of Game Ball Detection Switch in FIG. 1]
Next, the operation of the game ball detection switch 1 of FIG. 1 will be described with reference to the time charts of FIGS. Here, FIG. 6 shows the detection of the game ball when the abnormality detection unit 11 does not exist and the diodes D1 and D2 and the resistor R3 do not exist, that is, the conventional low-frequency near electromagnetic field detection function does not exist. The waveform of each output signal of the switch is shown. That is, in FIG. 6, from the top, the waveform A is the output signal V1 ′ of the resonance circuit 42 composed of the coil L12 and the capacitor C12, the waveform B is the output signal V5 ′ of the detection integration circuit, and the waveform C is the output of the comparator COM2. The signal V7 ′ and the waveform D indicate the output signal of the output terminal Vout. FIG. 7 shows waveforms of output signals of the game ball detection switch 1 of FIG. That is, in FIG. 7, the waveform A from the top indicates the output signal V1 of the resonance circuit 42, the waveform B indicates the output signal V5 of the detection integration circuit 112, and the waveform C indicates the output of the resonance circuit 41 including the coil L11 and the capacitor C11. The signal V2, the waveform D indicates the output signal V8 of the comparator COM1, and the waveform E indicates the output signal of the output terminal Vout.

  6 and 7, the game ball 2 passes through the through-hole H and is detected in the time t1 to t2, t3 to t4, t5 to t6, and t7 to t8. The waveform in the case where the low-frequency near electromagnetic field has arrived and the induced wave is being irradiated is shown from time t11 to t12.

  That is, normal passage detection is performed at time t1 to t2 and time t7 to t8, and the output signal V1 of the resonance circuit 42 is drawn in a band shape because of the large time axis, but oscillates when the passage of the game ball 2 is detected. Is stopped, the output signal V1 becomes 0V. Further, since the detection integration circuit 112 converts the output signal V3 of the oscillation circuit 111 accompanying the output signal V1 of the resonance circuit 42 into a direct current and outputs it, the output signal V5 has a waveform as shown by the waveform B in FIGS. It becomes.

  In the case of a conventional game ball detection switch in which the abnormality detection unit 11 does not exist, as shown in FIG. 6, when the game ball 2 does not pass or no low frequency near electromagnetic field arrives at time t0 to t1. The output signals V1 ′, V5 ′, and V7 ′ are at the Hi level, the Hi level, and the Low level, respectively. For this reason, the Zener diode ZD is closed, and the output signal Vout ′ is set to the Zener potential Vzd.

  When the game ball 2 passes beyond the time t1, the amplitude of the output signal V1 'of the resonance circuit 42 decreases, and the output signal V5' of the detection integration circuit 112 decreases along with this decrease. Then, as shown at time t21, when the threshold voltage of the comparator COM2 falls below Vth2, the output signal V7 'of the comparator COM2 changes to the Hi level. As a result, the Zener diode ZD is opened, and the leakage current mode in which the leakage current IL0 having the minimum current value flows is set. For this reason, the output signal Vout ′ at the output terminal Vout is a voltage (Vcc−RL · IL0) that is lowered from the power supply voltage Vcc by the voltage drop RL · IL0 due to the leakage current. This is the same operation at times t3 to t23 and t7 to 25.

  Further, when the passing of the game ball is completed after time t2, the amplitude of the output signal V1 'of the resonance circuit 42 increases, and the output signal V5' of the detection integration circuit 112 increases with this increase. As indicated by time t22, when the threshold potential Vth2 of the comparator COM2 is exceeded, the output signal V7 'of the comparator COM2 changes to the Low level. As a result, the Zener diode ZD is closed and the remaining voltage mode is set. For this reason, the output signal Vout ′ at the output terminal Vout becomes the Zener potential VZD from (Vcc−RL · IL0). This is the same operation from time t8 to t26.

  Further, at time t23, similarly to the case at time t21, after the passing of the game ball 2 is detected, when a low-frequency near electromagnetic field arrives at time t11, the resonance circuit 42 detects the low-frequency near electromagnetic field. As a result, the amplitude of the output signal V1 ′ of the resonance circuit 42 increases, and the output signal V5 ′ of the detection integration circuit 112 increases with this increase. As indicated by time t24, when the threshold potential Vth2 of the comparator COM2 is exceeded, the output signal V7 'of the comparator COM2 changes to the Low level. As a result, the Zener diode ZD is closed and the remaining voltage mode is set. For this reason, the output signal Vout ′ at the output terminal Vout becomes the Zener potential VZD from (Vcc−RL · IL0). Thereafter, the low-frequency near electromagnetic field continues to arrive until time t12. At time t4, the amplitude of the output signal V1 ′ of the resonance circuit 42 is not changed even if the passing of the game ball 2 is completed. Since the amplitude in the state where the sphere 2 is not detected is superimposed and the output signal V5 ′ of the detection integration circuit 112 remains in the raised state, the output signal V7 ′ of the comparator COM2 also remains at the low level. Thus, the output signal Vout ′ at the output terminal Vout remains at the Zener potential VZD. Further, even if the game ball 2 passes again from time t5 to time t6, since it is the same as that from time t11 to time t4, the output signal Vout 'at the output terminal Vout remains at the Zener potential VZD.

  As a result, among the times t11 to t12 when the low-frequency near electromagnetic field has arrived, the times t11 to t4 (strictly, times t24 to t4) that the game ball 2 passes and the times t5 to t6 are as follows. Therefore, a detection leak occurs in the output signal V7 ′ of the comparator COM2.

  On the other hand, in the gaming ball detection switch 1 of FIG. 1, as shown by the waveforms C and D of FIG. As a result, the output signal V8 of the comparator COM1 becomes low level. It should be noted that the amplitude of the output signal V2 of the resonance circuit 41 becomes 0 at times t0 to t11 when the low-frequency near electromagnetic field does not arrive and after the time t12, and accordingly, the output signal V8 of the comparator COM1 becomes the Hi level. Become.

  Therefore, as shown by the waveform E in FIG. 7, the output signal V8 becomes low level, that is, 0V at times t11 to t12 when the low-frequency near electromagnetic field arrives, so that the resonance circuit 42 The output signal V1 and the output signal V5 of the detection integration circuit 112 are clamped to the forward voltage 0.6V of the diodes D1 and D2, and become lower than the threshold value Vth2. As a result, the output signal V7 of the comparator COM2 outputs a Hi level signal.

  On the other hand, when the output signal V5 of the detection / integration circuit 112 is clamped to the forward voltage 0.6V of the diodes D1 and D2, in the game ball detector 12, the leakage current mode is determined. In R3, the current Vref / R3 flows in addition to the leakage current IL0 by the rated voltage Vref applied by the constant voltage circuit 113. For this reason, the output signal Vout of the output terminal Vout is Vcc−RL obtained by subtracting the voltage drop RL (IL0 + Vref / R3) due to the load resistance RL from the power supply voltage Vcc at times t11 to t12 when the low frequency near electromagnetic field has arrived. -(IL0 + Vref / R3).

  As a result, when the game ball detection switch 1 detects the passage of the game ball 2 when the low-frequency near electromagnetic field has not arrived, the output signal Vout is the first output voltage Vout_Hi (= Vcc−RL).・ IL0), when the passage of the game ball 2 is not detected, the output signal Vout becomes the second output voltage Vout_Low (= Vzd), and when the low-frequency near electromagnetic field has arrived, Regardless of whether or not the signal passes, the output signal Vout becomes a third output voltage Vout_Md (= Vcc−RL · (IL0 + Vref / R3)) that is an intermediate potential.

  Accordingly, an interface circuit that outputs an appropriate signal to the control device (CPU) of the gaming machine according to the output signal Vout is provided at the subsequent stage of the gaming ball detection switch 1 to appropriately detect whether or not the gaming ball has passed. It becomes possible to suppress the malfunction of the proximity switch caused by the approach of the low-frequency near electromagnetic field. Hereinafter, the output signal Vout_Hi is also referred to as a high output potential, the output signal Vout_Md is also referred to as a medium output potential, and the output signal Vout_Low is also referred to as a low output potential.

[Game ball detection processing]
Summarizing the above processing, the gaming ball detection processing is as shown in the flowchart of FIG. Note that the flowchart of FIG. 8 shows the operation state of each component of the game ball detection switch 1 of FIG.

  That is, in step S1, the process is switched based on whether or not a low-frequency near electromagnetic field has arrived. For example, if a low-frequency near electromagnetic field has arrived, the process proceeds to step S2.

  In step S2, since resonance occurs in the resonance circuit 41, the output signal V6 of the detection integration circuit 102 becomes higher than the threshold value Vth1, so the output signal V8 of the comparator COM1 becomes a low level signal (0 V).

  In step S3, as the output signal V8 of the comparator COM1 becomes 0V, the diodes D1 and D2 are enabled, and the output signals V1 and V5 are forcibly clamped to the forward voltages of the diodes D1 and D2. .

  In step S4, the output signal V5 of the detection integration circuit 112 becomes smaller than the threshold value Vth2 of the comparator COM2, so that in step S5, the output signal V7 of the comparator COM2 becomes a Hi level signal and enters the leakage current mode.

  In step S6, the output signal Vout of the output terminal Vout is obtained by calculating a drop voltage IL0 · RL generated by the leakage current IL0 flowing through the load resistor RL and a drop voltage RL · Vref / R3 by the current Vref / R3 flowing through the resistor R3. The added voltage becomes the intermediate output signal Vout_Md (= Vcc−RL · (IL0 + Vref / R3)) that is lowered from the power supply voltage Vcc.

  On the other hand, if the low frequency near electromagnetic field has not arrived at step S1, the process proceeds to step S7.

  In step S7, since resonance does not occur by the resonance circuit 41, the output signal V6 of the detection integration circuit 102 becomes lower than the threshold value Vth1, so that the output signal V8 of the comparator COM1 becomes a Hi level signal.

  In step S8, as the output signal V8 of the comparator COM1 becomes Hi level, the diodes D1 and D2 are in a non-conductive state, that is, in an invalid state.

  In step S9, the process is switched depending on whether or not the game ball 2 has passed. For example, if the game ball 2 has passed, the process proceeds to step S10.

  In step S10, the output signal V5 of the detection integration circuit 112 becomes smaller than the threshold value Vth2 of the comparator COM2, so in step S11, the output signal V7 of the comparator COM2 becomes a Hi level signal and enters the leakage current mode.

  In step S12, the output signal Vout of the output terminal Vout becomes a high level output signal Vout_Hi (= Vcc−RL · IL0) in which the drop voltage IL0 · RL generated in the load resistance RL due to the leakage current IL0 drops from the power supply voltage Vcc.

  Furthermore, if the game ball 2 does not pass in step S9, the output signal V5 of the detection integration circuit 112 becomes larger than the threshold value Vth2 of the comparator COM2 in step S13. Therefore, in step S14, the output signal of the comparator COM2 V7 becomes a low level signal and enters the residual voltage mode.

  In step S15, the output voltage Vout becomes a low level output signal Vout_Low (= VZD) that is the potential across the Zener diode ZD.

  According to the above processing, when a low-frequency near electromagnetic field arrives, regardless of whether or not the game ball 2 has passed, the middle output signal Vout_Md is output, and the low-frequency near electromagnetic field has not arrived, and When the game ball 2 passes, the high-level output signal Vout_Hi is output, and when the low-frequency near electromagnetic field has not arrived and the game ball 2 does not pass, the low-level output signal Vout_Low is output. Is done. As a result, it is possible to simultaneously and accurately monitor the arrival of the low frequency near electromagnetic field and the presence or absence of the passing of the game ball.

[Example of configuration of gaming machine provided with gaming ball detection switch of FIG. 1]
Next, with reference to FIG. 9, a description will be given of a configuration example of a gaming machine in which an appropriate interface circuit is provided at the subsequent stage of the above-described gaming ball detection switch 1 and a detection result is output to a control device (CPU). To do.

  The gaming machine 200 includes a gaming ball detection switch 1, an interface circuit 201, power supply units 202 and 203, and a CPU (Central Processing Unit) 204 that controls the overall operation of the gaming machine 200. The game ball detection switch 1 detects whether or not the game ball 2 has passed, detects the arrival of a low-frequency near electromagnetic field, and supplies the detection result to the interface circuit 201. The interface circuit 201 generates a signal corresponding to the detection result regarding the passage of the game ball 2 based on the detection result of the game ball detection switch 1 and supplies the signal to the CPU 204 from the output terminal Vend. The CPU 204 recognizes the passage of the game ball 2 based on the signal from the interface circuit 201 and executes various processes.

  The interface circuit 201 includes a comparator 214, a tristate buffer 215, a resistor R24, a voltage dividing circuit 211, a switching circuit 212, and a limiter circuit 213.

  The power supply unit 202 is connected to the voltage dividing circuit 211 and the switching circuit 212 in addition to the game ball detection switch 1 and the comparator 214, and supplies the voltage Vcc.

  The voltage dividing circuit 211 includes diodes D11 and D12 that function as constant voltage elements, a Zener diode ZD11, a constant current source I11, and a resistor R21. The switching circuit 212 includes a resistor R22 and a PNP transistor Tr1. Further, the limiter circuit 213 includes a resistor R23 and a Zener diode ZD21.

One end of the constant current source I11 of the voltage dividing circuit 211 is connected to the power supply unit 202, and the other end is an input unit for inputting a threshold voltage V _T of the cathode of the diode D12 and the comparator 214 (hereinafter referred to as a threshold voltage as appropriate). _VT input section) and one end of the resistor R21.

The anode of the diode D11 of the diodes D11 and D12 connected in series is connected to the collector of the transistor Tr1 of the switching circuit 212, and the cathode of the diode D12 is the other end of the constant current source I11, the resistance as described above. R21 and the threshold voltage V _T input of the comparator 214 are connected.

  The other end of the resistor R21 is connected to the cathode of the Zener diode ZD11, and the anode of the Zener diode ZD11 is grounded.

  The emitter of the transistor Tr1 of the switching circuit 212 is connected to the power supply unit 202.

  Further, the output part of the comparator 214 is connected to the cathode of the Zener diode ZD21 and the input part of the tristate buffer 215 via the resistor R22 of the switching circuit 212 and the resistor R23 of the limiter circuit 213. It is connected. The anode of the Zener diode ZD21 is grounded.

  The operation of the interface circuit 201 will be described.

  The voltage dividing circuit 211 enables or disables the diodes D11 and D12, respectively, by turning on or off a transistor Tr1 of the switching circuit 212 described later.

  The switching circuit 212 turns on or off the transistor Tr1 according to the Hi or Low level signal of the comparison output signal supplied from the comparator 214, and switches the first or second state of the voltage dividing circuit 211. Note that the case where the comparison output signal supplied from the comparator 214 is a low level signal (when no game ball passes) is the first state of the voltage dividing circuit 211 and is supplied from the comparator 214. When the comparison output signal is a Hi level signal (when a game ball passes), the voltage dividing circuit 211 is in the second state.

  Since the transistor Tr1 of the switching circuit 212 is a PNP type, the transistor Tr1 is turned on when the comparison output signal supplied from the comparator 214 is a low level signal (when there is no pachinko ball), and the switching circuit 212 is turned on. Puts the voltage dividing circuit 211 in the first state. Further, when the comparison output signal supplied from the comparator 214 is a Hi level signal (when there is a pachinko ball), the transistor Tr1 is turned off, and the switching circuit 212 sets the voltage dividing circuit 211 to the second state. To do.

In the first state of the voltage dividing circuit 211, the diodes D11 and D12 are enabled, and the residual voltage value (= Vcc−2Vd) obtained by subtracting the voltage applied to the diodes D11 and D12 from the voltage Vcc of the power supply unit 202 is high-order inverted. The voltage V_INHi is supplied to the threshold voltage V _T input section of the comparator 214.

Further, in the second state of the voltage dividing circuit 211, the diodes D11 and D12 are disabled, and a voltage value (VZD11 + I11 · V) obtained by adding the voltage of the Zener diode ZD11 and the voltage generated in the resistor R21 by the current value of the constant current source I11. R21) becomes the lower inversion voltage V_INLow and is supplied to the threshold voltage V _T input section of the comparator 214.

  The limiter circuit 213 prevents an excessive voltage higher than the Zener potential ZD21 of the Zener diode ZD21 from being input to the tristate buffer 215.

That is, in the interface circuit 201 of FIG. 9, as shown in FIG. 10, the low-order inversion voltage V_INLow has a characteristic that depends on the Zener potential of the Zener diode ZD11. That is, the voltage Vcc of the power supply unit 202, even higher within V _M, low inversion voltage V_INLow is the Zener voltage VZD11 of the Zener diode ZD11, and resistors R21, the voltage generated by the constant current source I11 is added Voltage (= VZD11 + R21 · I11).

As shown in FIG. 10, the low-level output voltage Vout_Low, which is the output of the game ball detection switch 1, has a certain characteristic that does not depend on the voltage Vcc of the power supply unit 202, and the Zener diode ZD in FIG. Zener diode ZD11 in 9 using zener diodes of the same characteristics, further, by appropriately operating a resistor R21 and a constant current source I11, can be maintained in the range V _M entire potential relationship as shown in FIG. 10 .

The high level output voltage Vout_Hi and the middle level output voltage Vout_Md, which are the outputs of the game ball detection switch 1, have characteristics that depend on the voltage Vcc of the power supply unit 202, as shown in FIG. Therefore, the voltage Vcc of the power supply unit 202, within the use range V _M, the load resistance RL, and a resistor R3 of the gaming ball detection switch 1, as well, by adjusting the resistor R21 in the interface circuit 201, a high inversion voltage V_INHi, high The output potential Vout_Hi (= Vcc−RL · IL0) is set lower than the intermediate inversion voltage Vout_Md (= Vcc−RL · (IL0 + Vref / R3)), and the low inversion voltage V_INLow is set to the low output voltage Vout_Low (= Vzd) and lower than the intermediate inversion voltage Vout_Md (= Vcc−RL · (IL0 + Vref / R3)), the presence or absence of the passage of the game ball 2 by the output signal Vout from the game ball detection switch 1 And whether or not low-frequency near electromagnetic fields have arrived properly The ability.

  That is, the output waveforms of the output signal Vout of the game ball detection switch 1 and the output signal Vend of the interface circuit 201 when the relationship of FIG. 10 is satisfied are as shown in FIG.

  That is, in the upper and lower stages of FIG. 11, as shown in FIG. 10, a high level inversion voltage V_INHi, a low level inversion voltage V_INLow, a high level output voltage Vout_Hi, a middle level output voltage Vout_Md, and a low level output voltage Vout_Low are set. In this case, output waveforms of the output signal Vout of the game ball detection switch 1 and the output signal Vend of the interface circuit 201 are shown.

  In the upper and lower waveforms in FIG. 11, the game ball 2 passes at times t101 to t102, t103 to t104, and t105 to 106, and the low-frequency near electromagnetic field arrives at times t111 to t112 and t113 to t114. It is a waveform when there is.

  That is, from time t0 to t101, no low-frequency near electromagnetic field arrives and the game ball 2 does not pass, so that the output signal Vout of the game ball detection switch 1 is low as shown in the upper part of FIG. The output voltage becomes Vout_Low. Since the low output voltage Vout_Low is lower than the low inversion voltage V_INLow, as shown in the lower part of FIG. 11, the output signal Vend from the interface circuit 201 is a low level signal. At this time, since the inversion potential becomes the high level inversion potential V_INHi, the output signal Vend from the interface circuit 201 is maintained at the low level unless the output signal Vout becomes the high level output potential Vout_Hi. .

  From time t101 to t111, the low-frequency near electromagnetic field does not arrive and the game ball 2 passes, so that the output signal Vout of the game ball detection switch 1 is a high output voltage as shown in the upper part of FIG. Vout_Hi. Since the high level output voltage Vout_Hi is higher than the high level inversion voltage V_INHi, as shown in the lower part of FIG. 11, the output signal Vend from the interface circuit 201 is a signal of the Hi level (the output voltage value voltage VDD of the power supply unit 203). Become. At this time, since the inversion potential becomes the lower inversion potential V_INLow, the output signal Vend from the interface circuit 201 is maintained at the Hi level unless the output signal Vout becomes the lower output potential Vout_Low. .

  From time t111 to t112, an electromagnetic field in the vicinity of a low frequency has arrived, and from time t111 to t102 and from t103 to t112, there is a passing of the game ball 2, but as shown in the upper part of FIG. The output signal Vout of the detection switch 1 becomes the middle output voltage Vout_Md irrespective of the passage of the game ball 2. Since the middle output voltage Vout_Md is higher than the lower inversion voltage V_INLow, the output signal Vend from the interface circuit 201 is maintained at the Hi level as shown in the lower part of FIG. That is, since the inversion potential remains at the lower inversion potential V_INLow, the output signal Vend from the interface circuit 201 is maintained at the Hi level.

  From time t112 to t104, the low-frequency near electromagnetic field does not arrive and the game ball 2 passes, so that the output signal Vout of the game ball detection switch 1 is a high output voltage as shown in the upper part of FIG. Vout_Hi. Since the high level output voltage Vout_Hi is higher than the high level inversion voltage V_INHi, as shown in the lower part of FIG. 11, the output signal Vend from the interface circuit 201 is a Hi level signal. That is, since the inversion potential remains at the lower inversion potential V_INLow, the output signal Vend from the interface circuit 201 is maintained at the Hi level.

  From time t104 to t113, no low frequency near electromagnetic field arrives and the game ball 2 does not pass through. Therefore, as shown in the upper part of FIG. 11, the output signal Vout of the game ball detection switch 1 has a low output voltage. Vout_Low. Since the low output voltage Vout_Low is lower than the low inversion voltage V_INLow, as shown in the lower part of FIG. 11, the output signal Vend from the interface circuit 201 is a low level signal. At this time, since the inversion potential becomes the high level inversion potential V_INHi, the output signal Vend from the interface circuit 201 is maintained at the low level unless the output signal Vout becomes the high level output potential Vout_Hi. . As a result, in the gaming machine 200 of FIG. 9, it is possible to provide a hold function that holds the state of the output signal Vend immediately before detection of the low-frequency near electromagnetic field.

  From time t113 to t114, a low-frequency near electromagnetic field has arrived, and from time 105 to t106, the game ball 2 has passed, but as shown in the upper part of FIG. 11, the output of the game ball detection switch 1 The signal Vout becomes the intermediate output voltage Vout_Md regardless of the passage of the game ball 2. Since the intermediate output voltage Vout_Md is lower than the high inversion voltage V_INHi, as shown in the lower part of FIG. 11, the output signal Vend from the interface circuit 201 is maintained at a low level. That is, since the inversion potential remains the low inversion potential V_INHi, the output signal Vend from the interface circuit 201 is maintained at a low level.

  As described above, the game ball detection switch 1 and the interface circuit 201 are combined to supply the CPU 204 that controls the operation of the gaming machine 200 with the passage of the game ball 2 and the arrival of the low-frequency near electromagnetic field as the output signal Vend. Therefore, unless the low-frequency near electromagnetic field arrives, if the game ball 2 passes, a Hi level signal is output, and if there is no pass, a Low level signal is output. Therefore, the CPU 204 outputs the output signal Vend as Hi. If the time maintained at the level is within a predetermined length range, it is possible to appropriately monitor that the game ball 2 has passed. In addition, when a low-frequency near electromagnetic field arrives, the level of the output signal Vend output immediately before is maintained during the arrival period. Therefore, the CPU 204 is a signal whose output signal Vend is Hi level. If the period exceeds a predetermined length of time, it can be considered that the arrival of an electromagnetic field in the vicinity of a low frequency is detected, and if it is at the Low level, the passing of the game ball 2 is detected. It can be regarded as not.

  In any case, it is possible to suppress a malfunction such that the passing of the game ball 2 is erroneously detected.

<2. Second Embodiment>
[Configuration Example of Other Game Ball Detection Switch to which the Present Invention is Applied]
In the above description, the configuration example in which the interface circuit is provided in the gaming wire detection switch of the 2-wire output system and the detection result is output to the CPU of the gaming machine has been described. However, the gaming ball detection switch of the 4-wire output system The interface circuit may be omitted and the detection result may be directly output to the CPU of the gaming machine.

FIG. 12 shows a configuration example of a gaming machine that uses a four-wire output type game ball detection switch, omits an interface circuit, and can output a detection result directly to the CPU of the gaming machine.
In the gaming ball detection switch 301 of the gaming machine 300 in FIG. 12, basically, the same configuration as the configuration in the gaming ball detection switch 1 in FIG. The description will be omitted as appropriate.

  That is, the game ball detection switch 301 in the gaming machine 300 of FIG. 12 differs from the game ball detection switch 1 of FIG. 1 in that the diodes D1 and D2, the Zener diode ZD, the resistors R3 and RL, and the capacitor C15 are replaced. The output terminals Vout1 and Vout2 output terminals of the abnormality detection unit 11 and the game ball detection unit 12 are provided, and further, transistors Tr101 and Tr102 including a base resistance and resistors RL1 and RL2 are provided in the preceding stage.

  That is, the output terminal V8 of the comparator COM1 is connected to the base of the transistor Tr101 via a base resistor, the collector is connected to the output terminal Vout2, and the emitter is grounded. The output terminal of the comparator COM2 is connected to the base of the transistor Tr101 via a base resistor, the collector is connected to the output terminal Vout1, and the emitter is grounded.

  That is, in the abnormality detection unit 11, the output signal V8 is at the Low level when the low-frequency near electromagnetic field does not arrive, and the output signal V8 is at the Hi level when the low-frequency near electromagnetic field arrives. For this reason, the transistor Tr101 is turned on with the arrival of the low-frequency near electromagnetic field, and is turned off otherwise, and is supplied to the CPU 302 as the output signal Vout2.

  Similarly, in the game ball detector 12, the output signal V7 becomes Hi level when the game ball passes, and the output signal V7 becomes Low level when the game ball does not pass. Therefore, when the game ball passes, the transistor Tr102 is turned on, supplied to the CPU 302 as the output signal Vout1, and otherwise turned off.

  Based on the output signals Vout1 and Vout2, the CPU 302 detects whether or not the game ball 2 has passed and whether or not a low-frequency near electromagnetic field has arrived. Note that the polarities of the output signal V6 of the detection integration circuit 102 to the comparator COM1 and the threshold value Vth may be switched. By doing so, the polarity of the output signal Vout2 is inverted. That is, when a low frequency near electromagnetic field arrives, it is supplied to the CPU 302 as the output signal Vout2. That is, normally, a plurality of gaming ball detection switches 301 are mounted on one gaming machine 300, but if any low-frequency electromagnetic field is detected by any gaming ball detection switch 301, all gaming ball detections are performed. It is considered necessary to prevent erroneous detection of the passing of the game ball 2 at the switch 301. Therefore, by adopting a so-called normally open configuration in this way, the output signals Vout2 of all the game ball detection switches 301 are aggregated into one and supplied to the CPU 302, so that a low frequency near electromagnetic field can be generated from either. When detected, it can be set as the structure which does not detect the passage of all the game balls 2, and it becomes possible to reduce manufacturing cost.

[Other coil configuration examples for detecting low-frequency near electromagnetic fields]
In the above, as shown in FIG. 5, an example in which a coil L11 for detecting a low-frequency near electromagnetic field is provided between the coil L12 for detecting passage of the game ball 2 and the connector 1f has been described. However, it may be provided at another position. That is, for example, as shown in FIG. 13, the coil L11 for detecting a low-frequency near electromagnetic field is provided at a position opposite to the connector 1f when viewed from the coil L12 that detects the passage of the game ball 2. You may do it.

  Further, the coil L11 for detecting the low-frequency near electromagnetic field may be provided on the outer peripheral side of the coil L12 for detecting the passage of the game ball 2, for example, as shown in FIG. In addition, in FIG. 15, although the shield member which should be provided in the outer peripheral side of the coil L12 is not described, the shield member is provided so that it may shield completely with respect to the coil L11 side.

  As described above, according to the present invention, the game ball detection switch detects the arrival of an electromagnetic field in the vicinity of a low frequency that induces a malfunction in the vicinity of a coil for detecting a game ball that erroneously detects the passage of the game ball. It becomes possible to suppress malfunction.

DESCRIPTION OF SYMBOLS 1 Game ball detection switch 2 Game ball 11 Abnormality detection part 12 Game ball detection part 41, 42 Resonance circuit 101 Oscillation circuit 102 Detection integration circuit 111 Oscillation circuit 112 Detection integration circuit 113 Constant voltage circuit L11, L12 Coil C11, C12 Capacitor R1, R2 Sensitivity adjustment resistor

Claims (10)

A first coil wound around the through hole;
A first oscillation circuit that includes the first coil and changes an oscillation state when a game ball passes through the through hole;
A second coil for detecting the arrival of an electromagnetic field in the vicinity of a low frequency by voltage induction;
A game ball detection switch including the second coil and a second oscillation circuit whose oscillation state changes by induction of the voltage;
The second coil is arranged such that the magnetic flux generation direction of the second coil coincides with the magnetic flux generation direction of the first coil ,
The game coil detection switch, wherein the second coil has a central rod axis of a magnetic body, is orthogonal to an end surface of the through hole, and one end surface of the central rod axis is disposed on substantially the same plane .   The game ball detection switch according to claim 1, further comprising a shield member that covers an outer peripheral portion of the first coil and opens an inner wall portion of the through hole. A first output circuit that outputs a first state signal in response to an oscillation state change of the first oscillation circuit;
A second output circuit that outputs a second state signal in response to a change in the oscillation state of the second oscillation circuit;
The first output circuit and the second output circuit output the first status signal and / or the second status signal directly to the control device, or via the interface circuit The game ball detection switch according to claim 1 , wherein the game ball detection switch outputs to a control device. A composite output circuit is further included in a subsequent stage of the first output circuit and the second output circuit,
The combined output circuit outputs a combined output signal of the first state signal and the second state signal directly to the control device or to the control device via the interface circuit. 3. The game ball detection switch according to 3. The first state signal includes a game ball detection signal indicating a situation where a game ball has passed through the through hole, and a game ball non-detection signal indicating a situation where the game ball has not passed,
The second state signal includes an electromagnetic field detection signal indicating the arrival of the low-frequency near electromagnetic field and an electromagnetic field non-detection signal indicating that the low-frequency near electromagnetic field does not arrive,
The composite output signal includes a first output signal indicating a game ball detection state in an environment where the low-frequency near electromagnetic field has not arrived, and a game in an environment where the low-frequency near electromagnetic field has not arrived. a second output signal indicative of the spherical non-detection state, according to claim 4, wherein a third output signal indicative of the arrival of the low-frequency electromagnetic field near in an environment where the low-frequency electromagnetic field near has arrived Game ball detection switch. An oscillation suppression circuit for suppressing or stopping the oscillation state of the first oscillation circuit;
The game ball according to claim 5 , wherein the second output circuit operates the oscillation suppression circuit to suppress or stop the oscillation state of the first oscillation circuit when outputting the electromagnetic field detection signal. Detection switch. The combined output circuit switches and outputs three voltage values assigned to the lowest potential as the second output signal, the highest potential as the first output signal, and the intermediate potential as the third output signal. The game ball detection switch according to claim 5 or 6 . The first output circuit is a direct current 2-wire output system, and further includes a current increasing device,
The game ball detection switch according to claim 7 , wherein the second output circuit operates the current increasing device to increase a current consumed by the game ball detection switch when outputting the electromagnetic field detection signal. A gaming ball detection system in which one or a plurality of gaming ball detection switches according to claim 8 are connected to the interface circuit,
The second output signal is intermediate between the low inversion potential of the interface circuit and the ground potential, and the first output signal is intermediate between the high inversion potential of the interface circuit and the power supply potential. The gaming ball detection system, wherein the third output signal is set in the middle of the high level inversion potential. A gaming ball detection switch according to any one of claims 1 to 8 and a gaming ball detection system according to claim 9 , or a pachinko gaming machine including a plurality thereof.

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