JP4798564B2 - Game machine - Google Patents

Description

  The present invention relates to a gaming machine provided with a protection device that stops the operation of a power IC that drives a hopper motor when an abnormality occurs, and the operation of the power IC is stopped by the protection device even when illegal radio waves are irradiated. About things.

  For example, a gaming machine such as a pachinko is equipped with a radio wave detection function unit (antenna 24, radio wave detection circuit 25) in order to prevent an act of illegally discharging a pachinko ball using an external radio wave. It is described that a power supply device is provided so as to prohibit the operation of a necessary function unit that needs to be regulated when the detection function unit detects a predetermined radio wave (illegal radio wave) (see, for example, Patent Document 1). ).

JP 2001-112939 A ([0031], [0041], FIG. 1, FIG. 2, FIG. 9)

  The power supply device described in the above-mentioned patent document uses a pattern (wiring pattern) formed on the power supply board as a radio wave receiving antenna and integrates the power supply board and the antenna, but separately provides a radio wave detection circuit. Since it is necessary, there is a problem that the number of parts is increased and the cost is increased.

  In particular, in the case of a pachislot machine, a hopper motor for paying out medals and a power IC for driving the hopper motor are usually provided, and a protection device is provided to prevent deterioration of the power IC due to an overcurrent of a short circuit. In some cases, in addition to the protective device, it is necessary to provide a separate radio wave detection circuit in order to prevent the so-called goto act of illegally driving the hopper motor with illegal radio waves and paying out medals, thereby suppressing the increase in the number of parts and the cost increase. I can't.

  The present invention has been made in view of the above problems, and in a gaming machine such as a pachislot machine provided with a protection device for protecting a power IC for driving a hopper motor, a detection circuit is configured by circuit components constituting the existing protection device. It is an object of the present invention to prevent illegal medal payout due to unauthorized radio waves.

In order to achieve the above object, the gaming machine according to the present invention allows a hopper motor driven by a power IC for paying out a predetermined number of stored medals in a hopper tank disposed in a housing, and when the abnormality occurs, the power In a gaming machine provided with a protection device for stopping the operation of the IC, the power IC is for a power connected to a pair of output terminals connected to the hopper motor and a power supply circuit that generates driving power for the hopper motor. An input terminal; and a protective input terminal for driving the hopper motor by outputting power input from the power supply circuit to the power input terminal to the output terminal. When the input signal at the terminal is at the permitted level, power can be supplied from the output terminal to the hopper motor, while when the input signal is at the prohibited level, the power is supplied to the hopper motor. Power supply from the power terminal to the hopper motor is impossible, and the protection device is provided between the output terminal and ground or during the power supply to the hopper motor by the power IC or the output terminal. A short-circuit detection circuit that detects whether or not a short-circuit has occurred between the two, and when the short-circuit detection circuit detects the short-circuit, the circuit waits for a predetermined delay time, and the short-circuit continues during the delay time. A protection circuit that latches the input signal of the protection input terminal of the power IC to the prohibited level, and a current detection resistor connected between the power supply circuit and the power input terminal, The short-circuit detection circuit is connected to the power supply circuit side of the current detection resistor, and generates a short-circuit reference voltage for detecting the short-circuit, and the current detection resistor A comparison circuit that compares the input voltage from the power input terminal side with the short-circuit reference voltage and sets the output signal from the output terminal to a normal level when normal and to a short-circuit level when short-circuited. When the short circuit level output signal is output from the comparison circuit, the protection circuit switches the input signal of the protection input terminal to the prohibited level, while the comparison circuit outputs a normal level output signal. A short-circuit protection circuit that switches the input signal of the protection input terminal to the permission level when output; an integration circuit that is connected to the output terminal of the comparison circuit via a diode and is charged by the output signal of the short-circuit level; A latch circuit connected to the integrating circuit and latching an output signal from the comparing circuit to a short-circuit level when the voltage of the integrating circuit reaches a predetermined level. Therefore, the detection circuit constituted by the diode connected to the output terminal of the comparison circuit and the integration circuit, and the antenna of the wiring and the substrate pattern constitute an unauthorized radio wave detection means, and the integration circuit The output signal from the comparison circuit is latched to a level equivalent to the short-circuit level by the latch operation of the latch circuit accompanying the charging of the integration circuit by the detection signal of the illegal radio wave by the detection means. Thus, the input signal of the protection input terminal is switched to the prohibited level by the short-circuit protection circuit, and the protection device is activated to stop the operation of the power IC (Claim 1).

Further, the comparison circuit compares the input voltage from the power input terminal side of the current detection resistor and the short-circuit reference voltage, the output signal from the output terminal is set to a low level when normal, The short-circuit protection circuit switches the input signal of the protection input terminal to the prohibited level when a high-level output signal is output from the comparison circuit. When the low level output signal is output from the input circuit, the input signal of the protection input terminal is switched to the permission level, and the integration circuit is charged by the high level output signal from the output terminal of the comparison circuit. In addition, the latch circuit is charged by a high level detection signal from the unauthorized radio wave detection means, and the latch circuit increases the voltage of the integration circuit to a predetermined level. If that may be those for latching an output signal from the comparator circuit to the high level (claim 2).

The power IC further includes a latch release circuit that is connected to the integration circuit and releases the latch by the latch circuit by discharging the integration circuit when a predetermined return command signal is generated. Is generated so that power can be supplied to the hopper motor, and the short circuit is detected by the short circuit detection circuit when the latch is released by the latch release circuit, or the illegal operation is performed. if continued output of the unauthorized radio wave detection signal by radio waves detecting means may be an input signal of the protective input terminal of the power IC is returned to the disable level by the protection circuit (claim 3).

The protection device includes a lock detection circuit that detects whether or not the hopper motor is locked while the hopper motor is being driven, and the detection of the lock by the lock detection circuit continues for a predetermined time. wherein optionally the input signal of the protection input terminals as further comprising a locking delay protection circuit for latching the disable level (claim 4).

  According to the first aspect of the present invention, when an unauthorized radio wave is detected by the unauthorized radio wave detecting means including the detection circuit and the antenna, the operation of the power IC is performed in the same manner as when the power IC is stopped by the protection device when an abnormality occurs. Since the operation is stopped, it is possible to prevent the medal from being illegally paid out due to the malfunction of the power IC due to the irradiation of unauthorized radio waves.

  At this time, since the detection circuit included in the protective device that stops the operation of the power IC when an abnormality occurs and the antenna of the wiring and the substrate pattern constitute the unauthorized radio wave detection unit, the radio wave detection unit is separately provided as in the past. There is no need to provide it, and unauthorized medal payout by unauthorized radio waves can be prevented with a simple and inexpensive configuration.

  It should be noted that illegal radio waves for gaming machines are often irradiated with a radio wave generating means in contact with a gaming machine casing with a relatively high output of about several tens of watts in a wide band. It is desirable to be configured to detect broadband radio waves.

According to the first aspect of the present invention, when a normal current flows through the current detection resistor, the output signal from the output terminal of the comparison circuit is set to the normal level, and the output signal of the normal level is output from the comparison circuit. Then, the input signal of the protection input terminal is set to the permission level by the short-circuit protection circuit, and the state in which power can be supplied from the power IC to the hopper motor is continued.

  When a short circuit occurs, the output signal from the output terminal of the comparison circuit is set to the short circuit level, and when the output signal of the short circuit level is output from the comparison circuit, the input signal of the protective input terminal is prohibited by the short circuit protection circuit. Thus, the power supply from the power IC to the hopper motor is disabled, and the power supply is stopped.

  Thus, when the power supply to the hopper motor is stopped, the overcurrent due to the short circuit does not flow to the current detection resistor, so the output signal from the output terminal of the comparison circuit returns to the normal level, and the output signal of the normal level from the comparison circuit When output, the input signal of the protective input terminal is set to the permission level by the short circuit protection circuit, and the power supply from the power IC to the hopper motor is restored, and the power supply to the hopper motor is resumed. . At this time, if the short circuit continues, the power supply to the hopper motor is stopped again. As described above, when the short circuit continues, the supply and stop of the power supply to the hopper motor are repeated. By the way, when an output signal of a short circuit level is output from the output terminal of the comparison circuit, the integration circuit connected to the output terminal of the comparison circuit is charged.

  And when the stop and restart of the power supply to the hopper motor are repeated, the integration circuit is intermittently charged, so that the voltage of the integration circuit gradually increases, and when the voltage of the integration circuit reaches a predetermined level, The output signal from the comparison circuit is latched (held) at the short circuit level by the latch circuit. In this way, by latching (holding) the output signal from the comparison circuit at the short circuit level, the input signal at the protection input terminal of the power IC is latched (held) at the prohibited level, and the power from the output terminal to the hopper motor is Supply becomes impossible and overcurrent due to a short circuit does not flow, so that the power IC can be reliably protected.

  Further, when the illegal radio wave is detected by the illegal radio wave detection means, the integration circuit is charged by the detection signal of the illegal radio wave, the voltage of the integration circuit gradually increases, and when the voltage of the integration circuit reaches a predetermined level, the latch circuit As a result, the output signal from the comparison circuit is latched (held) at the short circuit level, the input signal at the power IC protection input terminal is latched (held) at the inhibition level, and the power supply from the output terminal to the hopper motor is stopped. Therefore, illegal medal payout due to illegal radio waves can be reliably prevented.

  At this time, the detector connected to the output terminal of the comparator circuit and the integrating circuit constitute the detector circuit of the unauthorized radio wave detection means, and the power supply to the hopper motor can be stopped when the illegal radio wave is detected. The radio wave detection means can surely prevent illegal medal payout.

  Here, the time until the voltage of the integrating circuit reaches a predetermined level by the output signal of the short circuit level from the output terminal of the comparison circuit corresponds to the delay time. By the way, in the case of an illegal radio wave detection signal, the time until the voltage of the integration circuit reaches a predetermined level varies depending on the intensity of the illegal radio wave. Will occur. Further, since the output signal from the comparison circuit is latched (held) at the short circuit level or a level equivalent thereto, the integration circuit is continuously charged, and the voltage of the integration circuit becomes a predetermined level. The reached state is continued.

Further, since it is detected whether or not a short circuit is caused based on a current flowing through a current detection resistor connected between the power supply circuit and the power input terminal, an overcurrent due to the short circuit can be reliably detected. That is, for example, in a configuration in which a current detection resistor is connected between the ground terminal and the ground of the power IC, if the output terminal and the ground are directly short-circuited by, for example, a metal foreign object, the overcurrent due to the short circuit causes the current detection resistor to It will bypass and flow directly from the output terminal to ground. Therefore, in this case, a short circuit cannot be detected even if the current flowing through the current detection resistor is monitored. According to the invention of claim 1 , the power supply to the hopper motor is supplied from the power supply circuit. This is done by supplying the power input to the power input terminal of the power IC through the current detection resistor from the output terminal to the hopper motor. Therefore, even when the output terminal and the ground are directly short-circuited by, for example, a foreign substance, an overcurrent due to the short-circuit always flows through the current detection resistor, so that the short-circuit can be reliably detected.

According to the invention of claim 2 , when a normal current flows through the current detection resistor, the output signal from the output terminal of the comparison circuit is set to low level, and the low level output signal is output from the comparison circuit. Then, the input signal of the protection input terminal is set to the permission level by the short-circuit protection circuit, and the state in which power can be supplied from the power IC to the hopper motor is continued.

  When a short circuit occurs, the output signal from the output terminal of the comparison circuit is set to a high level, and when a high level output signal is output from the comparison circuit, the input signal at the protective input terminal is set to a prohibited level by the short circuit protection circuit. Thus, the power supply from the power IC to the hopper motor is disabled, and the power supply to the hopper motor is stopped.

  Thus, when the power supply to the hopper motor is stopped, the overcurrent due to the short circuit does not flow to the current detection resistor, so the output signal from the output terminal of the comparison circuit returns to the low level, and the low level output signal from the comparison circuit When output, the input signal of the protective input terminal is set to the permission level by the short circuit protection circuit, and the power supply from the power IC to the hopper motor is restored, and the power supply to the hopper motor is resumed. . At this time, if the short circuit continues, the power supply to the hopper motor is stopped again. As described above, when the short circuit continues, the supply and stop of the power supply to the hopper motor are repeated. Incidentally, when a high level output signal is output from the output terminal of the comparison circuit, the integration circuit connected to the output terminal of the comparison circuit is charged.

  And when the stop and restart of the power supply to the hopper motor are repeated, the integration circuit is intermittently charged, so that the voltage of the integration circuit gradually increases, and when the voltage of the integration circuit reaches a predetermined level, The output signal from the comparison circuit is latched (held) at a high level by the latch circuit. In this way, by latching (holding) the output signal from the comparison circuit at a high level, the input signal at the protection input terminal of the power IC is latched (held) at the prohibited level, and the power from the output terminal to the hopper motor is Supply becomes impossible and overcurrent due to a short circuit does not flow, so that the power IC can be reliably protected.

  Also, when the illegal radio wave is detected by the illegal radio wave detection means, the integration circuit is charged by the high level detection signal, the voltage of the integration circuit gradually increases, and when the voltage of the integration circuit reaches a predetermined level, the latch circuit As a result, the output signal from the comparison circuit is latched (held) at the short circuit level, the input signal at the power IC protection input terminal is latched (held) at the inhibition level, and the power supply from the output terminal to the hopper motor is stopped. Therefore, illegal medal payout due to illegal radio waves can be reliably prevented.

According to the third aspect of the present invention, when the return command signal is generated, the voltage of the integration circuit is discharged by the latch release circuit connected to the integration circuit. Then, the latch state by the latch circuit is released.

  At this time, if the short circuit is eliminated, normal operation is performed by releasing the latch, while if the short circuit still continues, the input signal of the power IC protection input terminal is returned to the prohibited level by the protection circuit, Hopper motor operation stops.

  Also, if an illegal radio wave is not detected when the return command signal is generated, normal operation is performed by releasing the latch. On the other hand, for example, when a specific manager such as a pachinko hall clerk performs an operation to generate a return command signal, it is unlikely that irradiation of unauthorized radio waves will continue in front of the administrator. If the return command signal is generated, the normal operation is necessarily performed. On the other hand, if the short circuit continues as described above, the operation of the hopper motor stops when the return command signal is generated because the operation of the hopper motor stops if the short circuit continues when the return command signal is generated. It is possible to recognize whether or not a short circuit has occurred depending on whether or not to stop.

  Thus, when the administrator performs a return command signal generation operation such as a switch operation, it is possible to easily recognize whether or not a short circuit has occurred depending on whether or not the operation of the hopper motor is stopped. .

According to the invention of claim 4 , it is detected whether or not the motor is locked while the hopper motor is being driven, and if the lock detection continues for a predetermined time, the input signal of the power IC protection input terminal is prohibited. Since it is latched (held) at the level, the power IC can be protected against an overcurrent caused by a lock of the hopper motor in addition to a short circuit.

  FIG. 1 is a perspective view showing an external appearance of a slot machine provided with an embodiment of a power IC protection device according to the present invention, and FIG. 2 is a right side view showing an internal configuration of a main part of the slot machine. The slot machine 1 is configured as shown in FIGS. 1 and 2, for example.

<Overall configuration>
In this slot machine 1, the front surface of the housing 3 is closed by a front panel 5 so as to be freely opened and closed, and an operation plate 7 is disposed at a substantially central height position of the front panel 5. A front plate 9 is disposed on the front side. The front plate 9 is provided with a horizontally long display window 11. Inside the display window 11, a reel unit 43 including left, middle, and right reels 13L, 13M, and 13R each having a plurality of symbols displayed on its peripheral surface is disposed. The 13M and 13R symbols are set so as to be looked at in the upper, middle and lower stages.

  Further, the operation panel 7 has a bet switch 15 for instructing the insertion of one medal from the credit medals stored inside, and the maximum number of medals per game (for example, three) from the credit medals. A maximum bet switch 17 for instructing the rotation, a lever-shaped start switch 19 for starting the rotation of each reel, and the left, middle and right for stopping the rotation of the left, middle and right reels 13L, 13M and 13R, respectively. Stop switches 21L, 21M, and 21R, a settlement switch 23 for paying out credit medals, and a medal slot 25 are provided.

  In addition, a liquid crystal display 27 for displaying a moving image or the like is provided in the approximate center above the front plate 9, and various winning symbols are displayed immediately above the liquid crystal display 27. An explanation panel 29 is provided, and speakers 31L and 31R are provided on the left and right sides of the liquid crystal display 27 and the explanation panel 29, respectively, for performing effects such as music. A central lamp portion 33M is disposed on the upper side of the explanation panel 29 and the speakers 31L and 31R, and left and right lamp portions 33L and 33R are disposed on the left and right sides thereof. Each lamp unit 33M, 33L, 33R is provided with a light source such as a light emitting diode. These lamp portions 33M, 33L, and 33R are integrally formed, and constitute an upper lamp portion 33 for performing effects such as notifying a player of winning and winning.

  In addition, a lower panel 35 on which a decorative image or the like is displayed is provided below the operation panel 7. A lower lamp unit in which a plurality of light sources are arranged in, for example, two rows on the left and right sides of the lower panel 35. 37L and 37R are provided. Further, below the lower panel 35, a medal payout opening 39 is provided at a substantially central position of the housing 3 in the left-right direction, and a medal receiver 41 for receiving a medal paid out from the payout opening 39 is provided. . A hopper unit 45 for discharging medals to the payout opening 39 is disposed below the reel unit 43 inside the housing 3.

  In addition, a medal selector 47 for determining whether or not the medal is a regular medal is disposed immediately inside the medal slot 25 of the housing 3. Then, when the medal inserted into the medal slot 25 is determined as a regular medal by the medal selector 47, it falls into the hopper tank 451 of the hopper unit 45. On the other hand, a medal that has not been determined to be a regular medal by the medal selector 47, a maximum number of credit medals stored (for example, 50) and a maximum number of coins to be inserted per game (for example, 3) even if the medal is determined to be a regular medal The medals inserted in excess of the total number are discharged from the payout opening 39 to the medal receiver 41 by the medal selector 47.

  In FIG. 2, a power supply box 48 is disposed on the back side of the hopper unit 45 (left side of the hopper unit 45 when viewed from the front of the housing 3). The power supply box 48 is provided with a power switch (not shown) for turning on the power of the slot machine 1, and is provided with a reverse rotation switch 49, and a reverse rotation LED 50 is provided inside the reverse rotation switch 49. The reverse switch 49 and the reverse LED 50 will be described later.

  FIG. 3 is a perspective view of the hopper unit with the hopper tank removed. The hopper unit 45 is provided with a disc 454 that has through-insertion portions 452 (six in this embodiment) into which the medals 51 in the hopper tank 451 are inserted, and is configured to be capable of normal rotation and reverse rotation around the rotation shaft 453. , A medal kicker 455 urged by an urging member (not shown), and a hopper motor 57 (FIG. 4) whose drive shaft is connected to a rotation shaft 453. Further, in the vicinity of the medal kicker 455, a medal discharge passage 458 is formed by the lead plate 456 and the guide wall 457, and this medal discharge passage 458 communicates with the payout port 39 of the housing 3.

  Then, when the disk 454 rotates normally (in the clockwise direction in FIG. 3) by driving the hopper motor 57 (FIG. 4), the medal 51 inserted into the insertion portion 452 is applied to the urging force of the urging member. On the other hand, the medal kicker 455 is pushed and guided by a guide pin (not shown) to gradually come out of the insertion portion 452. When the medal 51 is completely removed from the insertion portion 452, the medal kicker 455 is vigorously returned to the original position by the urging force of the urging member, whereby the medal 51 passes through the medal discharge passage 458 toward the payout port 39. It will be played.

<Electric configuration of slot machine>
FIG. 4 is a block diagram showing an electrical configuration of the slot machine 1. The insertion sensor 52 is provided in the vicinity of the medal insertion slot 25 inside the housing 3 and detects the inserted medals one by one. The payout sensor 53 is provided at the exit of the hopper unit 45 and detects medals paid out to the payout outlet 39 one by one. The left / middle / right position sensors 55L, 55M, and 55R are for detecting the rotational positions of the left / middle / right reels 13L, 13M, and 13R, respectively. For example, the left / middle / right reels 13L, 13M, and 13R Each of the provided photointerrupters detects the protruding portion. When the left, middle, and right reels 13L, 13M, and 13R rotate, the protruding portion is detected every round and the detection signal is output to the main control board 63.

  The hopper motor 57 rotates the disk 454 of the hopper unit 45 to pay out the medal 51 toward the payout port 39. The motor control board 59 is a board on which a control circuit for controlling the driving of the hopper motor 57 is mounted. The circuit configuration of the motor control board 59 will be described later. In this embodiment, each of the reels 13L, 13M, and 13R is rotationally driven by, for example, a stepping motor.

  Further, in the slot machine 1, a main control board 63 on which a main CPU 61 that controls a game is mounted and a sub control board 73 on which a sub CPU 71 that controls an effect related to the game is mounted are provided separately. ing.

  The RAM 65 of the main control board 63 temporarily stores data, and the ROM 67 stores a game machine program including preset data. The main CPU 61 controls the game by operating in accordance with the game machine program. Further, the main CPU 61 sends data related to the game to the sub CPU 71 as effect control data.

  The memory 75 of the sub-control board 73 includes a RAM unit that temporarily stores data and a ROM unit that stores a program for rendering. The sub CPU 71 controls the effect related to the game by operating according to the effect program based on the effect control data from the main CPU 61. For example, the sub CPU 71 displays a moving image on the liquid crystal display 27, generates music from the speakers 31L and 31R, or generates music from the speakers 31L and 31R according to an effect pattern set in advance corresponding to the progress of the game or the lottery result. The light sources of the lamp unit 33 and the lower lamp units 37L and 37R are blinked simultaneously or individually.

  The game includes a normal game that is a general game and a special game (bonus game) that is a game advantageous to the player over the normal game. Briefly explaining the normal game, in this slot machine 1, the insertion sensor 52 detects the insertion of a medal from the medal insertion slot 25, or the bet switch 15 or the maximum bet switch 17 is operated to input a credit medal. If there is, the game is started.

  Then, when the start switch 19 is operated after the game is started, first, a random number lottery is performed to determine whether or not the game is won, and rotation of all three reels 13L, 13M, and 13R starts almost simultaneously. Thereafter, when one of the three stop switches 21L, 21M, and 21R is operated, rotation of the reels 13L, 13M, and 13R corresponding to the stop switches 21L, 21M, and 21R is stopped.

  When all the three stop switches 21L, 21M, and 21R have been operated, the rotation of all three reels 13L, 13M, and 13R is stopped. At this time, when a predetermined symbol stops at a predetermined position, a prize is won, and a predetermined number of medals are paid out to the player by the hopper unit 45, or a predetermined profit such as replay is given to the player. The Instead of paying out medals, credit medals may be stored inside.

<Block configuration of control circuit>
FIG. 5 is a block diagram showing functional blocks of the control circuit of the hopper motor 57, and FIGS. 6A and 6B are circuit diagrams showing the main parts of a specific circuit example of FIG. FIG. 6A shows the circuit in the almost left half of FIG. 5, FIG. 6B shows the circuit in the almost right half of FIG. 5 including a part of FIG. 6A, and FIGS. 6A and 6B show the entire circuit. Yes.

(Power IC etc.)
The power IC 81 is a driver IC that drives the hopper motor 57, and includes motor output terminals OUT1 and OUT2, a power input terminal VS, a protection input terminal ST, and control input terminals IN1 and IN2. The motor output terminal OUT 1 is connected to the positive terminal of the hopper motor 57, and the motor output terminal OUT 2 is connected to the negative terminal of the hopper motor 57. The power input terminal VS is connected to the motor power supply circuit VDD via the current detection resistor R1. The protective input terminal ST is pulled up via a resistor R13. The control input terminal IN1 is pulled up via a resistor R23, and the control input terminal IN2 is pulled up via a resistor R22. Further, the control input terminal IN 1 is further connected to the reverse rotation switch 49, and the control input terminal IN 2 is further connected to the output terminal of the main CPU 61.

  The motor power supply circuit VDD generates electric power for driving the hopper motor 57, and outputs a voltage Vdd (for example, DC26V in this embodiment). The low-voltage power supply circuit VCC generates power for driving each circuit element and outputs a voltage Vcc (for example, DC 7 V in this embodiment).

  When the low-level forward signal is input from the main CPU 61 to the control input terminal IN2, the power IC 81 outputs the input power from the motor power supply circuit VDD to the power input terminal VS to the motor output terminal OUT1. In addition, the motor output terminal OUT2 is connected to the ground line, and the hopper motor 57 is rotated forward.

  The power IC 81 outputs the input power from the motor power supply circuit VDD to the motor output terminal OUT2 and the motor output terminal OUT1 when the reverse rotation switch 49 is pressed and the control input terminal IN1 is set to the low level. Is connected to the ground line and has a function of reversing the hopper motor 57.

  Furthermore, the power IC 81 can supply power from the motor output terminals OUT1 and OUT2 to the hopper motor 57 when the input signal Vst of the protection input terminal ST is at a high level (corresponding to the “permission level” in the present invention). On the other hand, when the input signal Vst at the protection input terminal ST is at a low level (corresponding to the “prohibition level” of the present invention), it is impossible to supply power from the motor output terminals OUT1 and OUT2 to the hopper motor 57. It is configured. Thus, in this embodiment, the motor power supply circuit VDD corresponds to the “power supply circuit” of the present invention, and the motor output terminals OUT1 and OUT2 correspond to the “output terminals of the power IC” of the present invention.

  The lock detection circuit 83, the lock delay protection circuit 85, the short circuit detection circuit 91, the short circuit protection circuit 93, the short circuit protection delay circuit 95, and the latch release circuit 97 are input signals to the protection input terminal ST based on the current flowing through the current detection resistor R1. The power IC 81 is protected by controlling the level of Vst. For example, when electric power is being supplied from the motor output terminal OUT1 of the power IC 81 to the hopper motor 57, that is, during normal rotation of the disk 454, if the medal 51 is jammed and the disk 454 cannot be rotated, the hopper motor 57 is locked. As a result, overcurrent flows. Further, during the forward rotation of the disk 454, for example, when an illegal act of inserting a foreign object from the discharge port 39 is performed and the positive terminal and the negative terminal of the hopper motor 57 are short-circuited by the foreign object, an overcurrent due to the short circuit flows. .

  Therefore, in this embodiment, the power IC 81 is protected from an overcurrent caused by a lock or a short circuit by the circuits 83, 85, 91, 93, 95, and 97. Further, a detection circuit is configured by the diode, resistor, and capacitor of the short circuit protection delay circuit 95, and an unauthorized radio wave detection means is configured by the detection circuit and the antenna by the wiring and the substrate pattern, and the operation of the power IC 81 is stopped when the illegal radio wave is detected. Like to do.

  First, an overview of the function of each circuit block will be described with reference to FIG. The lock detection circuit 83 detects the lock of the hopper motor 57. Further, when the lock detection circuit 83 detects the lock, the lock delay protection circuit 85 stops the operation by switching the input signal Vst of the protection input terminal ST of the power IC 81 to a low level after delaying for a predetermined time. Is to protect. The short circuit detection circuit 91 detects a short circuit between the positive terminal of the hopper motor 57 or the motor output terminal OUT1 of the power IC 81 and the negative terminal of the hopper motor 57, the motor output terminal OUT2 or the ground. The short circuit protection circuit 93 protects the power IC 81 by stopping the operation of the power IC 81 when the short circuit detection circuit 91 detects a short circuit. The short circuit protection delay circuit 95 latches protection by the short circuit protection circuit 93 after a predetermined time when the short circuit continues. The latch release circuit 97 releases the protection of the latched power IC 81.

  As will be described later, a detection circuit is also configured by the constituent circuit elements (diodes, resistors, capacitors) of the short-circuit protection delay circuit 95, and the detection circuit is constituted by the detection circuit and the antenna by the wiring and the substrate pattern. When the radio wave generating means is brought into contact with the body 3 and an illegal radio wave of several tens of watts is irradiated, it is detected by the illegal radio wave detecting means, and the power IC 81 is prevented from malfunctioning and illegally paying out medals. It has become.

<Specific circuit configuration>
Next, a specific circuit configuration example will be described with reference to FIGS. 6A and 6B.

(Lock detection circuit and short circuit detection circuit)
In the lock detection circuit 83, the output voltage Vdd of the motor power supply circuit VDD is divided by resistors R2 and R3 to generate a lock detection reference voltage Va, which is input to the non-inverting input terminal of the comparator IC1.

  In the short circuit detection circuit 91, the output voltage Vdd of the motor power supply circuit VDD is divided by resistors R4 and R5 to generate a short circuit detection reference voltage Vb, which is input to the non-inverting input terminal of the comparator IC2. The current detection resistor R1 connected between the motor power supply circuit VDD and the power input terminal VS of the power IC 81 is a low resistance for converting the current flowing from the motor power supply circuit VDD to the power IC 81 into the current detection voltage Vc. is there.

That is, as the current flowing through the current detection resistor R1 increases, the voltage drop at the current detection resistor R1 increases, and thereby the current detection voltage Vc decreases. The lock detection circuit 83 inputs the current detection voltage Vc as the input voltage Vc1 to the inverting input terminal of the comparator IC1, and the short circuit detection circuit 91 sets the current detection voltage Vc as the input voltage Vc2 via the resistor R6. The signal is input to the inverting input terminal. As shown in FIG. 6A, the output terminal of the comparator IC2 is pulled up to the voltage Vcc of the power supply circuit VCC via a resistor R7.

  The comparator IC1 of the lock detection circuit 83 compares the lock detection reference voltage Va and the input voltage Vc1 (in this circuit example, Vc1 = Vc). When the output signal Vs1 is Va ≦ Vc1, the comparator IC1 is at a low level. When> Vc1, the high level is set. The comparator IC2 of the short-circuit detection circuit 91 compares the short-circuit detection reference voltage Vb with the input voltage Vc2. The output signal Vs2 is low when Vb ≦ Vc2, and high when Vb> Vc2. And In this embodiment, for example, the lock detection reference voltage Va (resistance values of the resistors R2 and R3) is set so that Va> Vc1 when the current flowing through the current detection resistor R1 exceeds 2.3 A, and the current detection resistor R1 The short-circuiting detection reference voltage Vb (resistance values of the resistors R4 and R5) is set so that Vb> Vc2 when the current flowing through 4A exceeds 4A.

  Further, since the protection input terminal ST of the power IC 81 is pulled up to the voltage Vcc of the power supply circuit VCC via the resistor R13, the input signal Vst of the protection input terminal ST is at a high level. Therefore, when a normal rotation signal is input from the main CPU 61 to the control input terminal IN2 of the power IC 81, the power IC 81 connects the motor output terminal OUT2 to the ground and power from the motor output terminal OUT1 to the hopper motor 57. Supply is started, and thereby the hopper motor 57 starts normal rotation.

(Lock delay protection circuit)
In a normal state where a steady current flows through the current detection resistor R1, that is, Va ≦ Vc1, the output signal Vs1 of the comparator IC1 is at a low level. Therefore, the gate current of the thyristor Q1 of the lock delay protection circuit 85 does not flow, and the thyristor Q1 is turned off. As a result, the field effect transistor (hereinafter simply referred to as “transistor”) Q2 is off, and the transistor Q3 is off. Similarly, the output signal Vs2 of the comparator IC2 is at a low level.

(Short-circuit protection circuit)
Due to the low level of the output signal Vs2 of the comparator IC2, the transistor Q7 of the short circuit protection circuit 93 is turned off because its gate voltage is low. Since the transistors Q3 and Q7 are both turned off in this way, the input signal Vst at the protection input terminal ST of the power IC 81 pulled up to the voltage Vcc of the power supply circuit VCC via the resistor R13 is at the high level. As a result, the power IC 81 is continuously operable. Thus, in this embodiment, the motor power supply circuit VDD and the resistors R4 and R5 constitute the “reference voltage generation circuit” of the present invention. The comparator IC2 corresponds to the “comparison circuit” of the present invention.

(Short-circuit protection delay circuit)
At this time, the output signal Vs2 of the comparator IC2 is input to the integrating circuit by the resistor R15 and the capacitor C2 via the diode D1 of the short circuit protection delay circuit 95, and the output of the transistor Q6 which is one end side of the capacitor C2 When the gate voltage Vf rises as the capacitor C2 is charged and exceeds the threshold voltage Vth at which the transistor Q6 is turned on, the transistor Q6 is turned on and the inverting input terminal of the comparator IC2 is pulled down to the ground via the resistor R14. The voltage at both input terminals is latched (held) at Vb> Vc2.

(Illegal radio wave detection means)
Further, in the short-circuit protection delay circuit 95, a detection circuit 99 is constituted by the integration circuit of the capacitor C2 and the resistor R15 and the diode D1, and an unauthorized radio wave detection means is constituted by the detection circuit 99 and the antenna based on the wiring and the substrate pattern. ing. Therefore, when an improper radio wave is irradiated from the outside, a high-level detection signal of a DC component that is detected by the detection circuit 99 and half-wave rectified by the diode D1 flows to the capacitor C2, and the capacitor C2 is charged. When the gate voltage Vf of the transistor Q6 rises with charging and exceeds the threshold voltage Vth at which the transistor Q6 turns on, the transistor Q6 is turned on and the voltages at both input terminals of the comparator IC2 are latched (held) at Vb> Vc2. The As described above, also when the illegal radio wave is detected by the illegal radio wave detecting means, the transistor Q6 is turned on and the voltages at both input terminals of the comparator IC2 are latched (held) at Vb> Vc2.

<Operation>
(Operation when locked)
Next, with reference to FIGS. 6A, 6B, 7, and 8, the operation of each circuit when the hopper motor 57 is locked during operation will be described. FIG. 7 is a timing chart showing the transition of the voltage signal level of each part when the hopper motor 57 is locked, and FIG. 8 is a timing chart showing the transition of the voltage signal level of each part when releasing the lock protection.

  First, in the normal state, as described above, since the lock detection reference voltage Va and the input voltage Vc1 are Va ≦ Vc1, the output signal Vs1 of the comparator IC1 is at a low level. The gate voltage Vd of the thyristor Q1 and the gate voltage Ve for turning on the thyristor Q1 are Vd <Ve. Further, the input signal Vst of the protection input terminal ST of the power IC 81 is at a high level. At this time, since the gate of the transistor Q8 is pulled up to the voltage Vcc of the low-voltage power supply circuit VCC via the resistor R23, the transistor Q8 is turned on. Accordingly, since the gate of the transistor Q4 is at a low level, the transistor Q4 is turned off.

  Then, for example, when the medal 51 is clogged with the disk 454 and the hopper motor 57 is locked at the time t1 (FIG. 7) and an overcurrent exceeding 2.3 A flows through the current detection resistor R1, Va> Vc1 is satisfied, and the comparator IC1 Output signal Vs1 is switched from the low level to the high level. As a result, the capacitor C1 is charged and the gate voltage Vd of the thyristor Q1 gradually increases. When Vd> Ve at time t2, the thyristor Q1 is turned on. This turns on transistor Q2 and turns on transistor Q3. When the transistor Q3 is turned on, the input signal Vst of the protection input terminal ST is switched to a low level, and the power IC 81 stops its operation.

  Since the current stops flowing through the current detection resistor R1 due to the operation stop of the power IC 81, the condition returns to Va ≦ Vc1, thereby returning the output signal Vs1 of the comparator IC1 to the low level. Since the thyristor Q1 is not turned off, the input signal Vst of the protection input terminal ST is latched (held) at a low level, and the operation stop state of the power IC 81 continues. Further, the reverse LED 50 is turned on when the input signal Vst of the protection input terminal ST is latched (held) at a low level.

(Operation when unlocking)
When an abnormality is detected when the hopper motor 57 is stopped halfway and the front panel 5 of the housing 3 is opened, the fact that the power IC 81 is in an operation stop state is notified by turning on the reverse rotation LED 50. Then, when the reverse rotation switch 49 of the power supply box 48 is pressed at time t3 in FIG. 8 and the control input terminal IN1 is set to the low level, the gate voltage of the transistor Q8 is set to the low level, and the transistor Q8 is turned off. As a result, the gate of the transistor Q4 is pulled up to the voltage Vcc of the low-voltage power supply circuit VCC via the resistor R20, so that the transistor Q4 is turned on and the gate voltage Vd of the thyristor Q1 is lowered to the ground level.

  As a result, the thyristor Q1 is turned off, the transistor Q2 is turned off, the transistor Q3 is turned off, and the input signal Vst of the protection input terminal ST returns to the high level. As a result, the power IC 81 returns to the operable state, and the control input terminal IN1 is set to the low level by turning on the reverse rotation switch 49. Therefore, the power IC 81 connects the motor output terminal OUT1 to the ground and the motor input terminal IN1. Electric power is supplied from the output terminal OUT2 to the negative terminal of the hopper motor 57, and the hopper motor 57 (disk 454) is reversed. As a result, the medal 51 jammed in the disk 454 can be removed.

  In FIG. 7, the delay time T1 from the time t1 when the hopper motor 57 is locked and Va> Vc1 to the time t2 when the thyristor Q1 is turned on is the hopper motor 57 and the power even if the overcurrent due to the lock continues to flow. The value is set such that the IC 81 does not deteriorate. This delay time T1 is determined by the time constant of an integrating circuit composed of resistors R8, R9, R10 and a capacitor C1. However, when the hopper motor 57 is started, the inrush current may temporarily exceed 2.3A. Therefore, the delay time T1 is set to a value that is longer than the duration of the inrush current and as short as possible. In this embodiment, the delay time T1 is set to be about T1≈100 msec, for example. In FIG. 7, for convenience of explanation, the input voltage Vc1 of the comparator IC1 is shown to drop vertically when locked.

(Operation at short circuit)
Next, referring to FIG. 6A, FIG. 6B, and FIG. 9, during the operation of the hopper motor 57, the positive terminal of the hopper motor 57 or the motor output terminal OUT1 of the power IC 81, the negative terminal of the hopper motor 57, and the motor The operation of each circuit when a short circuit occurs between the output terminal OUT2 or the ground will be described. FIG. 9 is a timing chart showing the transition of the voltage signal level of each part when the short circuit occurs.

  First, in the normal state, as described above, when the short-circuit detection reference voltage Vb and the input voltage Vc2 are compared, Vb ≦ Vc2, the output signal Vs2 of the comparator IC2 is low level (“normal level” of the present invention). Is equivalent). Since the gate of the transistor Q6 of the short circuit protection delay circuit 95 is connected to the output terminal of the comparator IC2 via the diode D1 and the resistor R15, the threshold voltage Vth of the transistor Q6 and the gate voltage Vf of the transistor Q6 are In comparison, Vf <Vth and the transistor Q6 is off. At this time, since the gate of the transistor Q8 is pulled up to the voltage Vcc of the low-voltage power supply circuit VCC via the resistor R23, the transistor Q8 is turned on. Therefore, since the gate of the transistor Q5 is at a low level, the transistor Q5 is turned off.

  Then, for example, when the positive terminal (motor output terminal OUT1) and the negative terminal (motor output terminal OUT2) of the hopper motor 57 are short-circuited at time t5 (FIG. 9), the current flowing through the current detection resistor R1 increases and the comparator When the input voltage Vc2 of IC2 decreases and the current flowing through the current detection resistor R1 exceeds 4A and Vb> Vc2, the output signal Vs2 of the comparator IC2 is changed from the low level to the high level (corresponding to the “short circuit level” of the present invention). Switch to. As a result, the gate voltage of the transistor Q7 is switched from the low level to the high level and the transistor Q7 is turned on. As a result, the input signal Vst at the protection input terminal ST of the power IC 81 is switched to the low level, and the power IC 81 operates. To stop.

  When the supply of power to the hopper motor 57 is stopped by stopping the operation of the power IC 81, the current does not flow to the current detection resistor R1, so the input voltage Vc2 of the comparator IC2 rises. When Vb ≦ Vc2, the output signal Vs2 of the comparator IC2 is low. Return to level. Then, the transistor Q7 is turned off, the input signal Vst at the protection input terminal ST of the power IC 81 returns to the high level, and the power IC 81 returns to the operable state. Here, since the control input terminal IN <b> 2 is set to the low level by the normal rotation signal from the main CPU 61, the power IC 81 resumes the power supply to the hopper motor 57. However, since the short-circuit state between the positive terminal and the negative terminal of the hopper motor 57 continues, an overcurrent exceeding 4 A flows through the current detection resistor R1, and the power IC 81 stops operating again.

  Thus, when the power IC 81 repeats the operation stop and the operation restart, the capacitor C2 is charged while the output signal Vs2 of the comparator IC2 is at the high level, and the gate voltage Vf of the transistor Q6 gradually increases. When Vf> Vth at time t6, the transistor Q6 is turned on. As a result, the inverting input terminal of the comparator IC2 is pulled down to the ground via the resistor R14, so that Vb> Vc2 is latched (held), and the output signal Vs2 of the comparator IC2 is latched (held) at the high level.

  As a result, the transistor Q7 is latched on and the capacitor C2 continues to be charged, so that the transistor Q6 is latched on. Since the transistor Q7 is latched on, the input signal Vst of the protection input terminal ST is latched (held) at a low level, and the power IC 81 is latched in the operation stop state. Further, the reverse rotation LED 50 repeats blinking while the power IC 81 repeats operation stop and operation restart, and remains lit when the power IC 81 is latched in the operation stop state.

  In FIG. 9, the time T2 from the time t5 when the positive terminal and the negative terminal of the hopper motor 57 are short-circuited until the time when the input signal Vst of the protection input terminal ST becomes low level and the power IC 81 first stops operating is In this embodiment, for example, a very short value of about 1.5 μsec is set. This is realized by using a comparator having high-speed response performance formed in an integrated circuit as the comparator IC2.

  Further, the delay time T3 from the time t5 when the power IC 81 is short-circuited to the time t6 when the power IC 81 is latched in the operation stop state is set to a value that does not cause the power IC 81 to deteriorate even if an overcurrent due to the short circuit flows intermittently. ing. This delay time T3 is determined by the time constant of the integrating circuit composed of the resistor R15 and the capacitor C2. Therefore, in this embodiment, for example, the hopper motor 57 is turned on and off by a short circuit approximately 30 times, so that T3≈100 μsec is set. When the current flowing through the current detection resistor R1 exceeds 4A, the lock detection circuit 83 and the lock delay protection circuit 85 also operate as described with reference to FIG. However, since T1 (≈100 msec) >> T3 (≈100 μsec), the short-circuit protection circuit 93 and the short-circuit protection delay circuit 95 operate first.

  Thus, in this embodiment, the integrating circuit composed of the capacitor C2 and the resistor R15 corresponds to the “integrating circuit” of the present invention, and the transistor Q6 corresponds to the “latch circuit” of the present invention. Further, the short circuit protection circuit 93 and the short circuit protection delay circuit 95 constitute a “protection circuit” of the present invention.

(Operation when releasing short circuit)
Next, with reference to FIG. 6A, FIG. 6B, FIG. 10, and FIG. 11, the operation of each circuit when releasing short-circuit protection will be described. FIG. 10 is a timing chart showing the transition of the voltage signal level of each part when the short circuit is eliminated when the short circuit protection is released, and FIG. 11 is the transition of the voltage signal level of each part when the short circuit continues when the short circuit protection is released. It is a timing chart which shows.

  When an abnormality is detected when the hopper motor 57 is stopped halfway and the front panel 5 of the housing 3 is opened, the fact that the power IC 81 is in an operation stop state is notified by turning on the reverse rotation LED 50. At this stage, it is unknown whether the abnormality is due to a short circuit.

  For example, when the reverse rotation switch 49 of the power supply box 48 is pushed at time t7 (FIG. 10) and the control input terminal IN1 is set to the low level, the gate of the transistor Q8 is set to the low level and the transistor Q8 is turned off. . As a result, the gate of the transistor Q5 is pulled up to the output voltage Vcc of the low-voltage power supply circuit VCC via the resistor R20, so that the transistor Q5 is turned on. As a result, the charge of the capacitor C2 is discharged through the parallel circuit of the resistor R17 and the capacitor C3, the gate voltage Vf of the transistor Q6 decreases, and the transistor Q6 is turned off when Vf <Vth.

  Therefore, the latch of the inverting input terminal of the comparator IC2 is released, and Vb ≦ Vc2 is returned, and the output signal Vs2 of the comparator IC2 returns to the low level, whereby the input signal Vst of the protection input terminal ST of the power IC 81 becomes the high level. The power IC 81 returns to the operable state. In addition, the lit reverse LED 50 is turned off. The power IC 81 connects the motor output terminal OUT1 to the ground and supplies power from the motor output terminal OUT2 to the negative terminal of the hopper motor 57 so as to reverse the hopper motor 57.

  Here, when the short circuit is eliminated when the reverse rotation switch 49 is turned on, as shown in FIG. 10, Vb ≦ Vc2 is maintained, so that the output signal Vs2 of the comparator IC2 is held at the low level, and the transistor Q6 Remains off, so that the power IC 81 can be operated. The reverse rotation of the hopper motor 57 continues until the reverse rotation switch 49 is turned off.

  On the other hand, when the short circuit continues when the reverse rotation switch 49 is turned on, when the power IC 81 returns to the operable state and starts supplying power to reverse the hopper motor 57, the current detection resistor R1 exceeds 4A again. Overcurrent flows. As a result, as shown in FIG. 11, as in the case of FIG. 9, the power IC 81 repeatedly stops and restarts operation, the capacitor C3 is charged first, the capacitor C2 is charged continuously, and the gate voltage Vf of the transistor Q6 gradually increases. To rise. When Vf> Vth, the transistor Q6 is turned on, and Vb> Vc2 is held, whereby the power IC 81 is latched again in the operation stop state.

  According to the setting of the circuit constants described in FIG. 9 (that is, the on / off of the hopper motor 57 due to the short circuit is repeated about 30 times and T3≈100 μsec), the operation stop and the operation restart of the power IC 81 in FIG. Thus, the delay time T4 from the time t8 when the reverse rotation switch 49 is turned on to the time t9 when the power IC 81 is latched in the operation stop state is about T4≈400 μsec. Thus, in this embodiment, the ON operation of the reverse rotation switch 49 corresponds to “generation of a return command signal” of the present invention.

(Operation when unauthorized radio waves are detected)
Next, with reference to FIGS. 6A, 6B, and 12, the operation of each circuit when an unauthorized radio wave is detected by the unauthorized radio wave detection means while the hopper motor 57 is stopped will be described. FIG. 12 is a timing chart showing the transition of the gate voltage of the transistor Q6 when an illegal radio wave is detected.

  Now, as shown in FIG. 12, when the illegal radio wave detecting means comprising the detection circuit 99 and the antenna detects the illegal radio wave at time t10, the illegal radio wave is detected by the detection circuit 99 and half-wave rectified by the diode D1. A high-level detection signal of a direct current component flows to the capacitor C2, and the capacitor C2 is charged. As the capacitor C2 is charged, the gate voltage Vf of the transistor Q6 gradually increases.

  Then, when the gate voltage Vf of the transistor Q6 rises and depends on the intensity of the illegal radio wave, the transistor Q6 is turned on when the threshold voltage Vth is turned on at the time t11 after the delay time T5 has elapsed from the time t10. Thus, the voltages at both input terminals of the comparator IC2 are latched (held) such that Vb> Vc2. In this case, the voltage Vb is a reference voltage equivalent to the short-circuit detection reference voltage. Thus, when Vb> Vc2, the output signal Vs2 of the comparator IC2 is switched from the low level to the high level (short circuit level). As a result, the gate voltage of the transistor Q7 is switched from the low level to the high level and the transistor Q7 is turned on. As a result, the input signal Vst at the protection input terminal ST of the power IC 81 is switched to the low level, and the power IC 81 operates. Is stopped, power supply to the hopper motor 57 is stopped, and the hopper motor 57 is not driven.

  Thus, when the voltage at both input terminals of the comparator IC2 is latched (held) at Vb> Vc2, and when the output signal Vs2 of the comparator IC2 is latched (held) at a high level, the transistor Q7 is latched on, thereby protecting it. When the input signal Vst at the input terminal ST is latched (held) at a low level, the power IC 81 is latched in the operation stop state, and when the power IC 81 is latched in the operation stop state, the reverse rotation LED 50 remains lit.

(Operation when power IC is stopped after unauthorized radio wave detection)
Next, with reference to FIG. 6A, FIG. 6B, FIG. 13, and FIG. 14, the operation of each circuit when canceling the stop of the power IC 81 due to unauthorized radio wave detection will be described. FIG. 13 is a timing chart showing the transition of the voltage signal level of each part when the irradiation of the unauthorized radio wave is canceled when the stop of the power IC 81 due to the unauthorized radio wave detection is released, and FIG. It is a timing chart which shows transition of the voltage signal level of each part in case radio wave irradiation continues.

  When an illegal radio wave is detected and the operation of the power IC 81 is stopped, the hopper motor 57 is held in a stopped state. At that time, when the front panel 5 of the housing 3 is opened, the reverse rotation LED 50 is turned on so that the power IC 81 is in an operation stopped state. It is notified that there is. At this stage, it is unknown whether the abnormality is due to a lock, a short circuit, or an illegal radio wave.

  For example, when the reverse rotation switch 49 of the power supply box 48 is pressed at time t12 (FIG. 13) and the control input terminal IN1 is set to the low level, the gate of the transistor Q8 is set to the low level and the transistor Q8 is turned off. . As a result, the gate of the transistor Q5 is pulled up to the output voltage Vcc of the low-voltage power supply circuit VCC via the resistor R20, so that the transistor Q5 is turned on. As a result, the charge of the capacitor C2 is discharged through the parallel circuit of the resistor R17 and the capacitor C3, the gate voltage Vf of the transistor Q6 is lowered, and Vf <Vth is established, so that the transistor Q6 is turned off.

  Therefore, the latch of the inverting input terminal of the comparator IC2 is released, and Vb ≦ Vc2 is returned, and the output signal Vs2 of the comparator IC2 returns to the low level (normal level), thereby the input signal Vst of the protection input terminal ST of the power IC81. Switches to the high level, and the power IC 81 returns to the operable state. In addition, the lit reverse LED 50 is turned off. The power IC 81 connects the motor output terminal OUT1 to the ground and supplies power from the motor output terminal OUT2 to the negative terminal of the hopper motor 57 to reverse the hopper motor 57.

  Here, when the irradiation of the unauthorized radio wave is canceled when the reverse rotation switch 49 is turned on, Vb ≦ Vc2 is maintained as shown in FIG. 13, so that the output signal Vs2 of the comparator IC2 is held at the low level. Since the transistor Q6 remains off, the operable state of the power IC 81 is maintained. The reverse rotation of the hopper motor 57 continues until the reverse rotation switch 49 is turned off.

  On the other hand, as shown in FIG. 14, when the reverse rotation switch 49 is turned on at time t13 and the irradiation of unauthorized radio waves continues when the reverse rotation switch 49 is turned on, the power IC 81 is temporarily returned to the operable state and the hopper The power supply to the motor 57 is resumed, and the hopper motor 57 starts reverse rotation. However, since the irradiation of the unauthorized radio wave continues, the capacitor C2 discharged by turning on the transistor Q5 is changed to the capacitor C3 by the high level detection signal. , C2 are charged again, and when the gate voltage Vf of the transistor Q6 gradually increases and Vf> Vth, the transistor Q6 is turned on and the power IC 81 stops operating.

  Thus, the capacitor C2 is charged by the high level detection signal of the illegal radio wave, and the gate voltage Vf of the transistor Q6 gradually rises. As shown in FIG. 14, the delay time from the time t13 depends on the intensity of the illegal radio wave. When Vf> Vth is reached at time t14 after the lapse of T6, the transistor Q6 is turned on, and Vb> Vc2 is held, whereby the power IC 81 is latched in the operation stop state. Further, after the reverse rotation switch 49 is turned on, the power IC 81 operates normally for a while, and when the capacitor C2 is charged, the operation of the power IC 81 is stopped and the reverse rotation LED 50 is lit.

  At this time, when a store clerk or the like of the pachinko hall turns on the reverse switch 49, the store clerk opens the front panel 3. Therefore, it is not normally considered that the irradiation of illegal radio waves is continued in front of the store clerk, and the reverse switch 49 is turned on. Inevitably, the power IC 81 normally operates. On the other hand, in the case of continuing the short circuit as described above, the operation of the hopper motor 57 is stopped if the short circuit continues when the reverse rotation switch 49 is turned on, so that the abnormality is notified by turning on the reverse rotation LED 50, When the reverse switch 49 is turned on by the store clerk, it is possible to recognize whether or not the abnormality notification is due to the occurrence of a short circuit depending on whether or not the operation of the hopper motor 57 is stopped.

  As described above, according to this embodiment, the unauthorized radio wave detection means including the detection circuit 99 including the diode D1, the capacitor C2, and the resistor R15 and the antenna based on the wiring and the substrate pattern allows unauthorized use through the casing 3. When the radio wave is detected, the operation of the power IC 81 is stopped and the power supply to the hopper motor 57 is stopped in the same manner as the power IC 81 is stopped by the protective device when an abnormality occurs. It is possible to prevent the medal from being paid out illegally by the malfunction of the hopper motor 57.

  At this time, since the detection circuit 99 included in the protection device that stops the operation of the power IC 81 when an abnormality occurs and the antenna of the wiring and the substrate pattern constitute the unauthorized radio wave detection unit, the radio wave detection unit is conventionally used. There is no need to provide them separately, and unauthorized medal payout by unauthorized radio waves can be prevented with a simple and inexpensive configuration.

  Further, according to this embodiment, during driving of the hopper motor 57 by the power IC 81, the positive terminal (the motor output terminal OUT1 of the power IC 81) and the negative terminal (the motor output terminal OUT2 of the power IC 81, that is, the ground) of the hopper motor 57. When the short circuit is detected, the process waits for the delay time T3. If the short circuit continues for the delay time T3, the input signal of the protection input terminal ST of the power IC 81 is latched (held) at a low level. ing. As a result, power supply from the motor output terminal OUT1 to the hopper motor 57 becomes impossible and an overcurrent due to a short circuit does not flow, so that the power IC 81 can be protected.

  Further, according to this embodiment, since the short circuit is detected based on the current flowing through the current detection resistor R1 connected between the motor power supply circuit VDD and the power input terminal VS of the power IC 81, the short circuit is detected. The overcurrent due to can be reliably detected. That is, for example, in a configuration in which a current detection resistor is connected between the ground terminal GND of the power IC 81 and the ground, if the motor output terminal OUT1 and the ground are directly short-circuited by, for example, a metal foreign object, an excess due to the short-circuit is caused. The current flows directly from the motor output terminal OUT1 to the ground, bypassing the current detection resistor. Therefore, in this case, even if the current flowing through the current detection resistor connected between the ground terminal GND and the ground is monitored, a short circuit cannot be detected. On the other hand, in this embodiment, the hopper motor 57 is supplied with electric power from the motor power supply circuit VDD via the current detection resistor R1 to the electric power input terminal VS of the power IC 81, and the motor output terminal OUT1. To the hopper motor 57. Therefore, even when the motor output terminal OUT1 and the ground are directly short-circuited by, for example, a foreign substance, an overcurrent due to the short-circuit always flows to the current detection resistor R1, so that the short-circuit can be reliably detected.

  Further, according to this embodiment, when the overcurrent flowing through the current detection resistor R1 exceeds 4 A and Vb> Vc2 using the comparator IC2 having high-speed response performance, the protection input terminal ST of the protection input terminal ST is reached in a very short time T2. The input signal Vst is set to a low level to make the power IC 81 inoperable. The power supply to the hopper motor 57 is repeatedly stopped and restarted, and after the delay time T3 until the gate voltage Vf of the transistor Q6 becomes Vf> Vth, the power IC 81 is latched in an inoperable state. Yes. That is, the short-circuit current flows intermittently. Therefore, since the average value of the overcurrent is lowered, the delay time T3 can be set to a larger value than when the short-circuit current continuously flows. Thereby, the time constant of the integrating circuit composed of the resistor R15 and the capacitor C2 can be set with a margin.

  Further, according to this embodiment, when the reverse rotation switch 49 is turned on after the hopper motor 57 is stopped, the transistor Q5 of the latch release circuit 97 is turned on, and the charging voltage of the capacitor C2 is changed from the capacitor C3 and the resistor R17. The charge voltage Vf becomes Vf <Vth, the transistor Q6 is turned off, and the latch (hold) of the output signal Vs2 from the comparator IC2 to the high level is released. . For this reason, coupled with the fact that no current flows through the current detection resistor R1, the output signal Vs2 of the comparator IC2 becomes low level, and the input signal Vst of the protection input terminal ST of the power IC 81 becomes high level. On the other hand, when the reverse rotation switch 49 is turned on and the control input terminal IN1 is set to the low level, electric power is supplied from the motor output terminal OUT2 of the power IC 81 to the negative terminal of the hopper motor 57 to reversely rotate the hopper motor 57. Try to let them. At this time, if the short circuit still continues, the input signal Vst of the protection input terminal ST of the power IC 81 is returned to the low level, and the reverse operation of the hopper motor 57 is stopped. As described above, according to this embodiment, it is easily determined whether or not the short-circuit between the positive terminal and the negative terminal of the hopper motor 57 still continues only by the operator performing an operation of turning on the reverse switch 49. can do.

  In addition, when a store clerk or the like of a pachinko hall turns on the reverse switch 49, the store clerk opens the front panel 3. Therefore, it is not normally considered that irradiation of illegal radio waves is continued in front of the store clerk, and the reverse switch 49 is turned on. Inevitably, the power IC 81 normally operates, whereas when the reverse rotation switch 49 continues to be short-circuited, the operation of the hopper motor 57 is stopped. Therefore, when the reverse rotation switch 49 is turned on, the hopper Whether or not the operation of the motor 57 is stopped can recognize whether or not the lighting of the reverse rotation LED 50 notifying abnormality is due to the occurrence of a short circuit.

  Further, according to this embodiment, it is detected whether or not the lock detection circuit 83 is locked while the hopper motor 57 is being driven, and when the lock continues for a predetermined time, the thyristor Q1 is turned on and the input terminal for protection of the power IC 81 Since the ST input signal Vst is latched (held) at a low level, the power IC 81 can be protected against an overcurrent caused by locking of the hopper motor 57 caused by the medal 51 being jammed in the disk 454 or the like.

<Deformation>
The present invention is not limited to the above embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, the specific circuit configuration is not limited to that shown in FIGS. 6A and 6B. Hereinafter, modifications of the circuit configuration will be described.

  15A and 15B are circuit diagrams showing a circuit configuration of the first modification. In addition, the same code | symbol is attached | subjected to what fulfill | performs the same function as the said embodiment (FIG. 6A, 6B), and it demonstrates centering around difference. In the first modification, the lock detection circuit 83 and the latch release circuit 97 have the same configuration as in the above embodiment. The lock delay protection circuit 85 has the same configuration as that of the above embodiment except that the resistor R13 and the transistor Q3 are omitted. The protection input terminal ST of the power IC 81 is a connection point between the transistor Q2 and the resistor R12. It is connected to the. In the short circuit detection circuit 91, the input signal of the comparator IC2 is opposite to that of the above embodiment, the short circuit detection reference voltage Vb is input to the inverting input terminal of the comparator IC2, and the input voltage Vc2 is non-inverted of the comparator IC2. Input to the input terminal. The short-circuit protection delay circuit 95 has the same configuration as that of the above embodiment except that the anode of the diode D1 is connected to the protection input terminal ST of the power IC 81 via the resistor R33.

  Further, in the power IC 81 according to the first modification, the relationship between the level of the input signal Vst at the protection input terminal ST and the operable state is opposite to that in the above embodiment. That is, the power IC 81 can supply power from the motor output terminals OUT1 and OUT2 to the hopper motor 57 when the input signal Vst of the protection input terminal ST is at a low level (permission level). It differs from the above-described embodiment only in that the power supply from the motor output terminals OUT1, OUT2 to the hopper motor 57 is impossible when the ST input signal Vst is at a high level (prohibition level). ing.

  In the short-circuit detection circuit 91 of this first modification, the comparator IC2 compares the short-circuit detection reference voltage Vb with the input voltage Vc2, and sets the output signal Vs2 to the low level when Vc2 ≦ Vb, and when Vc2> Vb. High level. In the first modification, for example, the short-circuit detection reference voltage Vb (resistance values of the resistors R4 and R5) is set so that Vc2 ≦ Vb when the current flowing through the current detection resistor R1 is 4 A or more.

  Further, since the protection input terminal ST of the power IC 81 is pulled down to the ground via the resistor R12, the input signal Vst of the protection input terminal ST is at a low level, and the power IC 81 is in an operable state. It has become. Therefore, when a normal rotation signal is input from the main CPU 61 to the control input terminal IN2 of the power IC 81, the power IC 81 connects the motor output terminal OUT2 to the ground and power from the motor output terminal OUT1 to the hopper motor 57. Supply is started, and thereby the hopper motor 57 starts normal rotation.

  When the steady state current is flowing through the current detection resistor R1, that is, when Vc2> Vb, the output signal Vs2 of the comparator IC2 is at a high level (normal level). Therefore, since the transistor Q13 of the short-circuit protection circuit 93 is turned off, the input signal Vst of the protection input terminal ST of the power IC 81 that is pulled down to the ground via the resistor R12 is held at a low level. The IC 81 is continuously operable. On the other hand, in the short circuit protection delay circuit 95, the anode of the diode D1 is connected to the protection input terminal ST via the resistor R33, so that the charging voltage of the capacitor C2 (gate voltage of the transistor Q6) Vf is low in the normal state. Stay on level.

  Further, when the hopper motor 57 is locked, the thyristor Q1 is turned on, and the transistor Q2 is turned on, the level of the input signal Vst at the protection input terminal ST of the power IC 81 rises to the voltage Vcc of the power supply circuit VCC, The power IC 81 stops operating.

  Next, in FIGS. 15A and 15B, during operation of the hopper motor 57, the positive terminal of the hopper motor 57 or the motor output terminal OUT1 of the power IC 81, the negative terminal of the hopper motor 57, the motor output terminal OUT2, or the ground The operation of each circuit when a short circuit occurs between the two will be described.

  When the short circuit occurs, the current flowing through the current detection resistor R1 increases and the input voltage Vc2 of the comparator IC2 decreases, and when the current flowing through the current detection resistor R1 exceeds 4A and Vb ≧ Vc2, the output of the comparator IC2 The signal Vs2 is switched from the high level to the low level (short circuit level). As a result, since the transistor Q13 of the short circuit protection circuit 93 is turned on, the input signal Vst of the protection input terminal ST of the power IC 81 is switched to a high level, and the power IC 81 stops its operation. Further, when the transistor Q13 is turned on, the capacitor C2 is charged via the resistor R33, the diode D1, and the resistor R15, so that the gate voltage Vf of the transistor Q6 increases. Further, when the transistor Q13 is turned on, a current is supplied from the power supply circuit VCC, and the reverse rotation LED 50 is turned on.

  When the power supply to the hopper motor 57 is stopped by stopping the operation of the power IC 81, the current does not flow to the current detection resistor R1, so the input voltage Vc2 of the comparator IC2 rises. When Vb <Vc2, the output signal Vs2 of the comparator IC2 is high. Return to level. Then, since the transistor Q13 of the short circuit protection circuit 93 is turned off, the input signal Vst at the protection input terminal ST of the power IC 81 returns to the low level, and the power IC 81 returns to the operable state. Here, since the control input terminal IN <b> 2 is set to the low level by the normal rotation signal from the main CPU 61, the power IC 81 resumes the power supply to the hopper motor 57. However, since the short-circuit state continues, an overcurrent of 4 A or more flows through the current detection resistor R1, and the power IC 81 stops operating again.

  As described above, when the power IC 81 repeatedly stops and restarts operation, the capacitor C2 is charged while the transistor Q13 of the short-circuit protection circuit 93 is on, and the gate voltage Vf of the transistor Q6 gradually increases. It operates similarly to the embodiment. That is, when Vf> Vth, the transistor Q6 (corresponding to the “latch circuit” of the present invention) is turned on, and the output signal Vs2 of the comparator IC2 is latched (held) at a low level. As a result, since the transistor Q13 is latched on, the input signal Vst of the protection input terminal ST is latched (held) at a high level, and the power IC 81 is latched in the operation stop state. Further, the reverse rotation LED 50 repeats blinking while the power IC 81 repeats operation stop and operation restart, and remains lit when the transistor Q13 is latched on.

  In FIG. 15A and FIG. 15B, regarding the operation of each circuit when releasing the short circuit protection, the latch release circuit 97 has the same configuration as that of the above embodiment, and the short circuit protection delay circuit 95 is also connected to the anode of the diode D1. Since the configuration other than the above is the same as that of the above embodiment, it operates in the same manner as the above embodiment.

  Subsequently, for example, when the illegal radio wave is detected by the illegal radio wave detection means including the detection circuit 99 including the diode D1, the capacitor C2, and the resistor R15 and the antenna having the wiring and the board pattern while the hopper motor 57 is stopped. The high-level detection signal of the DC component half-wave rectified by the diode D1 flows to the capacitor C2, the capacitor C2 is charged, and the gate voltage Vf of the transistor Q6 gradually rises as the capacitor C2 is charged. When Vth becomes greater than Vth, the transistor Q6 is turned on, the voltage at both input terminals of the comparator IC2 is latched (held) at Vb ≧ Vc2, and the output signal Vs2 of the comparator IC2 is latched (held) at low level, and the transistor Q13 is turned on. Since it is latched, the protective input terminal ST of the power IC 81 Input signal Vst is latched (held) at the high level, the power supply of the operating power IC81 is stopped to the hopper motor 57 is stopped.

  In FIG. 15A and FIG. 15B, with regard to the operation of each circuit when releasing the stop of the power IC 81 due to unauthorized radio wave detection, the latch release circuit 97 has the same configuration as the above embodiment, and the short circuit protection delay circuit 95 is also Since the configuration other than the connection destination of the anode of the diode D1 is the same as that of the above embodiment, the operation is the same as that of the above embodiment.

  16A and 16B are circuit diagrams showing a specific circuit configuration of the second modification. In addition, the same code | symbol is attached | subjected to what fulfill | performs the same function as the said embodiment (FIG. 6A, 6B), and it demonstrates centering around difference. In the second modification, the lock detection circuit 83, the short circuit detection circuit 91, the short circuit protection delay circuit 95, and the latch release circuit 97 have the same configuration as the above embodiment (FIGS. 6A and 6B). The lock delay protection circuit 85 has the same configuration as that of the above embodiment except that the resistor R13 and the transistor Q3 are omitted. The protection input terminal ST of the power IC 81 is a connection point between the transistor Q2 and the resistor R12. It is connected to the.

  In the power IC 81 of the second modification, the relationship between the level of the input signal Vst at the protection input terminal ST and the operable state is opposite to that in the above embodiment. That is, the power IC 81 according to the second modification is similar to the first modification (FIGS. 15A and 15B) when the input signal Vst at the protection input terminal ST is at a low level (permission level). , OUT2 can supply power to the hopper motor 57. On the other hand, when the input signal Vst of the protection input terminal ST is at a high level (inhibited level), power is supplied from the motor output terminals OUT1, OUT2 to the hopper motor 57. The only difference from the above embodiment is that it is configured so as to be impossible.

  Since the protection input terminal ST of the power IC 81 is pulled down to the ground via the resistor R12, the input signal Vst of the protection input terminal ST is at a low level, and the power IC 81 is in an operable state. Yes. Therefore, when a normal rotation signal is input from the main CPU 61 to the control input terminal IN2 of the power IC 81, the power IC 81 connects the motor output terminal OUT2 to the ground and power from the motor output terminal OUT1 to the hopper motor 57. Supply is started, and thereby the hopper motor 57 starts normal rotation.

  When the steady state current is flowing through the current detection resistor R1, that is, when Vc2 ≧ Vb, the output signal Vs2 of the comparator IC2 is at a low level (normal level). Accordingly, since the transistor Q15 of the short-circuit protection circuit 93 is turned off and thereby the transistor Q14 is turned off, the input signal of the protection input terminal ST of the power IC 81 that is pulled down to the ground via the resistor R12. Vst is held at a low level, and the power IC 81 is continuously operable.

  In this state, when the hopper motor 57 is locked, the thyristor Q1 is turned on, and the transistor Q2 is turned on, the level of the input signal Vst at the protection input terminal ST of the power IC 81 rises to the voltage Vcc of the power supply circuit VCC. The power IC 81 stops operating.

  Further, when a short circuit occurs between the positive terminal of the hopper motor 57 or the motor output terminal OUT1 and the negative terminal of the hopper motor 57, the motor output terminal OUT2 or the ground, and Vb> Vc2, the output signal Vs2 of the comparator IC2 Switches from low level to high level (short circuit level). As a result, the transistor Q15 of the short-circuit protection circuit 93 is turned on, thereby turning on the transistor Q14. Therefore, the input signal Vst at the protection input terminal ST of the power IC 81 is pulled up to the power supply circuit VCC and switched to the high level. Instead, the power IC 81 stops operating. Further, when the transistor Q15 is turned on, a current is supplied from the power supply circuit VCC, and the reverse LED 50 is turned on.

  Hereinafter, the operation in which the power IC 81 is latched in the operation stop state after the power IC 81 repeats the operation stop and the operation restart, and the operation when the reverse rotation switch 49 is pressed and the latch is released are the same as in the above embodiment. Done.

  Further, for example, when an illegal radio wave is detected by an illegal radio wave detection means configured by a detection circuit including a diode D1, a capacitor C2, and a resistor R15 and an antenna having a wiring and a board pattern while the hopper motor 57 is stopped, the diode A high-level detection signal of the DC component half-wave rectified by D1 flows to the capacitor C2 and the capacitor C2 is charged. As the capacitor C2 is charged, the gate voltage Vf of the transistor Q6 gradually increases, and Vf> Vth. Then, the transistor Q6 is turned on, the voltages at both input terminals of the comparator IC2 are latched (held) at Vb> Vc2, and the output signal Vs2 of the comparator IC2 is latched (held) at a high level, so that the transistor Q15 is latched on. Transistor Q14 is latched on and this Thus the input signal Vst of the protection input terminal ST of the power IC81 is latched (held) at the high level, the power supply of the operating power IC81 is stopped to the hopper motor 57 is stopped. Further, when the transistor Q15 is turned on, a current is supplied from the power supply circuit VCC, and the reverse LED 50 is turned on.

  In FIG. 16A and FIG. 16B, regarding the operation of each circuit when releasing the stop of the power IC 81 due to unauthorized radio wave detection, the latch release circuit 97 has the same configuration as the above embodiment, and the short-circuit protection delay circuit 95 is also Since the configuration other than the connection destination of the anode of the diode D1 is the same as that of the above embodiment, the operation is the same as that of the above embodiment.

As explained above, according to the first modification and the second modification,
The relationship between the short-circuit detection reference voltage Vb and the input voltage Vc2 of the comparator IC2 of the short-circuit detection circuit 91 and the inverting input terminal and the non-inverting input terminal;
The short circuit protection circuit 93 is latched by charging the integration circuit of the short circuit protection delay circuit 95;
Only one or more of the relationship between the level of the input signal Vst at the protection input terminal ST of the power IC 81 and the operable state of the power IC 81 is different from the above-described embodiment, and any modification is possible. The same effect as the above embodiment can be obtained. Here, it is needless to say that the short circuit protection circuit 93 may be latched by the discharging of the integration circuit of the short circuit protection delay circuit 95, and the same effect as in the above embodiment may be obtained.

  Further, for example, in the above-described embodiment and each modification, when the hopper motor 57 is short-circuited, the short-circuit protection circuit 93 repeatedly stops and restarts the power supply to the hopper motor 57, and after a predetermined delay time T3 has elapsed, the hopper motor 57 However, the present invention is not limited to this. For example, similarly to the lock delay protection circuit 85, the input signal Vst of the protection input terminal ST of the power IC 81 may be latched (held) at a prohibited level after a predetermined time has elapsed since the detection of the short circuit. However, in this case, since an overcurrent due to a short circuit flows continuously, the predetermined time until the latch is set to a value smaller than the delay time (T3 in the above embodiment) of the above embodiment and each modified embodiment. Must be set.

1 is a perspective view showing an external appearance of a slot machine including an embodiment of a power IC protection device according to the present invention. FIG. It is a right side view showing the internal configuration of the main part of the slot machine. It is a perspective view of a hopper unit in the state where a hopper tank was removed. FIG. 3 is a block diagram showing an electrical configuration of the slot machine. It is a block diagram which shows the functional block of the control circuit of a hopper motor. FIG. 6 is a circuit diagram illustrating a main part of a specific circuit example of FIG. 5. FIG. 6 is a circuit diagram illustrating a main part of a specific circuit example of FIG. 5. It is a timing chart which shows transition of the voltage signal level of each part when a hopper motor locks. It is a timing chart which shows transition of the voltage signal level of each part when releasing lock protection. It is a timing chart which shows transition of the voltage signal level of each part when the positive terminal and negative terminal of a hopper motor short-circuit. It is a timing chart which shows transition of the voltage signal level of each part when a short circuit is canceled at the time of cancellation of short circuit protection. It is a timing chart which shows transition of the voltage signal level of each part when a short circuit continues at the time of cancellation of short circuit protection. It is a timing chart which shows transition of the voltage signal level of each part when an illegal electric wave is detected. It is a timing chart which shows transition of the voltage signal level of each part in case irradiation of illegal electric wave is canceled at the time of stop cancellation of power IC by illegal electric wave detection. It is a timing chart which shows transition of the voltage signal level of each part in case irradiation of illegal electric wave continues at the time of stop cancellation of power IC by illegal electric wave detection. It is a circuit diagram which shows the 1st modification. It is a circuit diagram which shows the 1st modification. It is a circuit diagram which shows a 2nd modification. It is a circuit diagram which shows a 2nd modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Slot machine, 45 ... Hopper unit, 49 ... Reverse switch, 57 ... Hopper motor, 59 ... Motor control board, 81 ... Power IC, 83 ... Lock detection circuit, 85 ... Lock delay protection circuit, 91 ... Short circuit detection circuit, 93 ... Short circuit protection circuit, 95 ... Short circuit protection delay circuit, 97 ... Latch release circuit, 99 ... Detection circuit, D1 ... Diode (detection circuit), C2 ... Capacitor (integration circuit, detection circuit), IC2 ... Comparator (comparison circuit, (Latch circuit), OUT1, OUT2 ... motor output terminal (output terminal), Q6 ... transistor (latch circuit), R1 ... current detection resistor, R4, R5 ... resistor (reference voltage generation circuit), R15 ... resistor (integration circuit, Detection circuit), ST ... Input terminal for protection, VDD ... Motor power supply circuit (power supply circuit, reference voltage generation circuit)

Claims (4)

In a gaming machine provided with a protection device that allows driving by a power IC of a hopper motor that pays out a predetermined number of stored medals in a hopper tank disposed in a housing, and stops operation of the power IC when an abnormality occurs,
The power IC is
A pair of output terminals connected to the hopper motor; a power input terminal connected to a power supply circuit that generates driving power for the hopper motor; and a protection input terminal. Power that is input to the input terminal is output to the output terminal to drive the hopper motor, and when the input signal of the protective input terminal is at a permission level, power from the output terminal to the hopper motor On the other hand, when the input signal is at a prohibited level, the power supply from the output terminal to the hopper motor is impossible,
The protective device is
A short circuit detection circuit that detects whether a short circuit has occurred between the output terminal and the ground or between the output terminals during power supply to the hopper motor by the power IC;
When the short circuit is detected by the short circuit detection circuit, it waits for a predetermined delay time. If the short circuit continues during the delay time, the input signal to the protection input terminal of the power IC is inhibited. With a protection circuit that latches to the level,
A current detection resistor connected between the power supply circuit and the power input terminal;
The short circuit detection circuit is:
A reference voltage generating circuit that is connected to the power supply circuit side of the current detection resistor and generates a short-circuit reference voltage for detecting the short circuit;
The input voltage from the power input terminal side of the current detection resistor and the short-circuit reference voltage are compared, and the output signal from the output terminal is set to a normal level when normal, and to the short-circuit level when short-circuited Comparison circuit to
With
The protection circuit is
When the output signal of the short circuit level is output from the comparison circuit, the input signal of the protection input terminal is switched to the prohibition level, while when the output signal of the normal level is output from the comparison circuit, the input signal of the protection input terminal is switched. A short-circuit protection circuit for switching the input signal to the permission level;
An integration circuit connected to the output terminal of the comparison circuit via a diode and charged by the output signal of the short circuit level;
A latch circuit connected to the integrating circuit and latching the output signal from the comparing circuit at a short-circuit level when the voltage of the integrating circuit reaches a predetermined level;
With
The detection circuit configured by the diode and the integration circuit connected to the output terminal of the comparison circuit, the wiring and the antenna of the substrate pattern constitutes an unauthorized radio wave detection means,
The integration circuit is charged by an illegal radio wave detection signal by the illegal radio wave detection means, and the output signal from the comparison circuit is short-circuited by a latch operation of the latch circuit accompanying charging of the integration circuit by the illegal radio wave detection signal. Latching to a level equivalent to a level, the input signal of the protective input terminal is switched to the prohibited level by the short circuit protection circuit, and the protection device is activated to stop the operation of the power IC. Gaming machine. The comparison circuit compares the input voltage from the power input terminal side of the current detection resistor with the short-circuit reference voltage, and sets the output signal from the output terminal to a low level when normal, Sometimes it ’s a high level,
When the high-level output signal is output from the comparison circuit, the short-circuit protection circuit switches the input signal of the protection input terminal to the prohibited level, and when the low-level output signal is output from the comparison circuit. The input signal of the protective input terminal is switched to the permission level,
The integration circuit is charged by the high level output signal from the output terminal of the comparison circuit, and is charged by the high level detection signal by the unauthorized radio wave detection means,
The gaming machine according to claim 1 , wherein the latch circuit latches an output signal from the comparison circuit to a high level when the voltage of the integration circuit rises to a predetermined level. A latch release circuit connected to the integration circuit and releasing the latch by the latch circuit by discharging the integration circuit when a predetermined return command signal is generated;
The power IC is configured to be able to supply power to the hopper motor when the return command signal is generated.
If the short circuit is detected by the short circuit detection circuit when the latch is released by the latch release circuit, or if the output of the detection signal of the illegal radio wave by the illegal radio wave detection means is continued, the power is output by the protection circuit. The gaming machine according to claim 1 or 2 , wherein an input signal of the protection input terminal of the IC is returned to the prohibited level. The protective device is
A lock detection circuit for detecting whether or not the hopper motor is locked during the driving of the hopper motor;
The lock delay protection circuit for latching an input signal of the protection input terminal of the power IC to the prohibition level when the lock detection by the lock detection circuit continues for a predetermined time. The gaming machine according to any one of 1 to 3 .

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