JP3255463B2 - Drive circuits for gaming machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game machine driving circuit used for a pachinko game machine, a slot machine, and the like. More particularly this invention, a current for operating the electric device, the overvoltage on the game machine drive circuit for turning on / off controlled in accordance with a predetermined control signal, electric equipment, such as a lamp, to prevent failure by overcurrent The present invention relates to a technique for extending the life of a computer.

[0002]

2. Description of the Related Art Conventionally used in pachinko game machines and the like.
For example, a lamp driving circuit including a transistor is used for turning on / off a lamp as an example of an electric device . The base of this transistor is connected to the control circuit of the pachinko gaming machine. The collector of the transistor is connected to one of the power terminals of the lamp. Another one of the power supply terminals of the lamp is connected to a DC power supply of a predetermined voltage (for example, +21 V) via a fuse or the like. The emitter of the transistor is grounded. A control signal for controlling turning on / off of the lamp is provided to a base of the transistor from a control circuit of the pachinko gaming machine, and the lamp is driven according to the control signal.

[0003]

In such a conventional lamp driving circuit, when an excessive current flows through the lamp,
Blowing the fuse cuts the circuit, thereby preventing the lamp from being destroyed. However, at this time, since the transistor is destroyed by the excessive current before the fuse is blown, there is a problem that the lamp drive circuit must be replaced although the lamp can be protected.

The present invention has been made in view of the above-described problems, and has as its object to provide a drive circuit for a game machine which can protect electric equipment against overcurrent and is not likely to be damaged by overvoltage or overcurrent. It is to provide.

[0005]

According to a first aspect of the present invention, there is provided a game machine driving circuit for driving an electric device in accordance with a predetermined control signal, wherein the first and second driving circuits are provided with a driving potential difference. A switch element having a second terminal and a control terminal to which the control signal is input, and controlling a conduction between the first and second terminals in response to the control signal; An overvoltage protection circuit that is connected between the first terminal and the control terminal and that is conductive in response to a voltage between the first terminal and the control terminal being equal to or higher than a predetermined value, and that is always nonconductive. , Connected to the switch element,
An overcurrent protection circuit that limits a current flowing through the switch element when a current flowing through the switch element is equal to or greater than a predetermined first magnitude; and a current that is connected to the switch element and flows through the switch element. When it becomes equal to or larger than a predetermined second size larger than the first size,
Switch interrupting means for applying a control signal for interrupting the switch element to the control terminal. According to a second aspect of the present invention, in addition to the configuration of the first aspect, a pulsating potential difference is applied to the first and second terminals,
The overvoltage protection circuit returns to the non-conducting state when the overvoltage is released and the pulsating potential difference becomes equal to or less than a predetermined value, and the overcurrent protection circuit suppresses the overcurrent and sets the pulsating potential difference to a predetermined value. By returning below, it returns to the normal state where the current is not limited, and the switch cutoff means
When the overcurrent is released and the pulsating potential difference becomes equal to or less than a predetermined value, the device returns to a normal state in which a control signal for shutting off the switch element is not output. Contract
The present invention described in claim 3 is directed to claim 1 or claim 2.
In addition to the configuration of the invention described above, the overcurrent protection circuit
The current flows through the resistor due to the driving potential difference.
The current is limited according to the magnitude of the resulting voltage.
It is characterized by the following. The present invention described in claim 4 is a
In addition to the configuration of the invention according to any one of claims 1 to 3,
The switch cutoff means is caused by the driving potential difference.
This causes a large voltage caused by the current flowing through the resistor.
Control signal for shutting off the switch element according to the magnitude
It is provided to the control terminal. Claim 5
The present invention described in any one of claims 1 to 4
In addition to the configuration of the invention, the control terminal input to the control terminal
Also includes a Zener diode to stabilize pressure
It is characterized by the following.

[0006]

According to the first aspect of the present invention, the magnitude of the current flowing through the switch element is controlled in accordance with a control signal normally given to the control terminal of the switch element, and the current turns on / off the electric device. Is performed. When the potential difference between the first terminal and the control terminal becomes larger than a predetermined value, the overvoltage protection circuit is turned on and the potential difference between the first terminal and the control terminal is reduced. There is no danger of being destroyed. When the current flowing through the switching element becomes larger than the first magnitude, a control signal for limiting the flowing current is given to the control terminal of the switching element by the overcurrent protection circuit. Therefore, the possibility that the switching element is broken by an excessive current is reduced. Furthermore, when the current is increased instantaneously, the current cannot be limited by the overcurrent protection circuit, and when the current becomes larger than the second magnitude, the current flowing through the switch is cut off by the switch cutoff means. . Therefore, even in such a case, there is no possibility that the switch element is destroyed. According to the second aspect of the present invention, in addition to the operation of the first aspect, the potential difference between the first and second terminals pulsates. As a result, the overvoltage is released and the pulsating potential difference becomes equal to or less than a predetermined value, whereby the overvoltage protection circuit returns to the non-conductive state. When the overcurrent is released and the pulsating potential difference becomes a predetermined value or less, the overcurrent protection circuit returns to a normal state in which the current is not limited, and the switch cutoff unit does not output a control signal for cutting off the switch element. Return to normal state. The invention according to claim 3
According to the above, the operation of the invention according to claim 1 or 2
In addition, the overcurrent protection circuit is activated by the driving potential difference.
This causes a large voltage caused by the current flowing through the resistor.
The current is limited according to the magnitude. Claim 4
According to the present invention described in any one of claims 1 to 3,
In addition to the functions of the above-described invention, the switch shut-off means may
Current flows through the resistor due to the potential difference
The switching element is blocked according to the magnitude of the resulting voltage.
A control signal to be turned off is given to the control terminal. Claim 5
According to the described invention, any one of claims 1 to 4
In addition to the operation of the invention described in the above, the input to the control terminal
Zener diode is set for the control voltage stabilized that
Have been killed.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a lamp driving circuit according to the present invention; In this embodiment, the case where the switch circuit is used in a pachinko game machine will be described, but the switch circuit may be used in other types of game machines. For example, the present invention is applied to other types of gaming machines as long as there is a possibility of using a circuit that does not cause any inconvenience even if the current for driving is a pulsating current, such as a lamp. be able to.

FIG. 1 is a front view of a game board of a pachinko game machine using a lamp drive circuit which is an example of a switch circuit according to the present invention. Referring to FIG. 1, a variable display device section 6 capable of variably displaying a plurality of types of symbols and ball receiving members 12a and 12b are opened and closed in a game area 1 of a game board, so that a ball can be easily won. A game device 2 is provided in which a variable winning ball device unit 11 that changes between a first state and a second state in which a hit ball hardly wins or does not win is integrally mounted. Below the gaming machine 2, a start winning port 15 is provided. A ball entrance 3 is provided at an upper portion of the gaming device 2, and a specific winning opening 4 where a game ball entering the ball entrance 3 stops is provided at a central portion of the gaming device 2, and a lower portion of the specific winning opening 4 is provided. Is provided with a symbol stop switch 5. The variable display device section 6 includes variable displays 6a to 6c each capable of variably displaying a plurality of types of symbols and a decorative LED (Light).
Emitting Diode 20 is provided. Below the specific winning opening 4, a ball receiving portion 8 for receiving a ball passing through the specific winning opening 4 and a ball received by the ball receiving portion 8 are displayed as display results when the variable display device 6 stops. A distributing device 7 for distributing right or left according to the content; and a distributing device 7 when the result displayed on the variable display unit 6 is a specific content (for example, a so-called "random"). A winning / disappearing winning port 9 for inducing a game ball by the player and a normal winning port 10 for inducing a game ball when the display result of the variable display unit 6 is otherwise. Below the distribution device 7, a remaining number display portion 14 for indicating how many times the variable prize ball device portion 11 can be opened later is provided, and around the distribution device 7, a winning number display 13 is provided. Is arranged.

In the game area 1, there are further arranged a side lamp 16, a windmill lamp 17, and chucker lamps 18, 19 connected to the lamp drive circuit according to the present invention.

FIG. 2 is a rear view of the game board shown in FIG. Referring to FIG. 2, the above-mentioned symbol stop switch 5 is arranged at the center of the back surface of gaming machine 2. Solenoids 21 for opening / closing the ball receiving members 12a and 12b (see FIG. 1) are provided on both sides of the symbol stop switch 5, and a distribution device 7
(See FIG. 1), a motor 22 for driving, a right generation / deletion switch 23 for detecting a game ball which has won the right generation / deletion winning prize port 9 (see FIG. 1), and the ball receiving member 1
During the opening of the game balls 2a and 12b (see FIG. 1), the count switch 24 for counting the number of game balls that have won the variable prize ball unit 11 and the game balls that have won the starting winning opening 15 (see FIG. 1). And a start port switch 25 for detecting the

The outline of the operation of the pachinko gaming machine shown in FIGS. 1 and 2 is as follows. The pachinko ball fired and fired by the player is driven into the game area 1 shown in FIG. During this time, the symbols on the variable indicators 6a to 6c are constantly changing. When a game ball enters the ball entrance 3, the game ball stops at the specific winning opening 4 and is detected by the symbol stop switch 5. In response to the symbol stop switch 5 detecting a game ball, the displays of the variable displays 6a to 6c stop in order from the left. If the display result of the variable display unit 6 at the time of stoppage is “random”, the distribution device 7 is rotated clockwise in FIG. 1 by the motor 22, and the ball receiving unit 8 receives the game ball. It leads to the right generation / disappearance winning opening 9. If not, the distribution device 7 is rotated counterclockwise in FIG. 1 by the motor 22, receives the game ball in the ball receiving portion 8, and guides the game ball to the normal winning opening 10. The ball guided to the winning / disappearance winning opening 9 is detected by the right / disappearing switch 23.

The gaming machine control computer changes the control to a state called "right generation" in response to the right generation / destruction switch 23 detecting a game ball. When a game ball wins in the start winning port 15 during the right generation, the start port switch 25 detects the game ball. In response to this, the ball receiving members 12a and 12b are opened by the solenoid 21 so that the game balls can be easily won. Ball receiving members 12a, 12b
Is terminated after 10 seconds have passed after the opening or when 10 or more game balls have won the variable prize ball device section 11, whichever is earlier. The winning of the game ball to the variable winning prize ball unit 11 is performed by the count switch 24 shown in FIG. During the generation of the right, the game ball is guided to the right generation / deletion winning prize port 9 in the same manner as described above, and the right is deleted by being detected by the right generation / deletion switch 23. Alternatively, the right is extinguished by winning 16 game balls in the starting winning opening 15. When the right is generated, the remaining number display 14 displays “16”. Thereafter, every time a game ball wins in the starting winning opening 15, the value is decremented by one and displayed.

When a game ball wins at each winning opening, a predetermined number of game balls are paid out according to the type of each winning opening. In addition, the number of game balls that have won the variable prize ball device 11 while the variable prize ball device 11 is being opened is displayed by the winning number display 13.

During this time, the side lamp 16 and the windmill lamp 1
7. The chucker lamps 18, 19, etc., flash in accordance with the game state, enlivening the interest of the game.

FIG. 3 is a block diagram of a control circuit and peripheral circuits used in the pachinko gaming machine. Referring to FIG. 3, the control circuit of the pachinko gaming machine detects a game state according to a program for controlling various devices, and collects information necessary for game control (hereinafter referred to as “microcomputer”). ), An initial reset circuit 30 for applying a reset pulse to the basic circuit 27 when power is turned on, and a clock signal reset by the initial reset circuit 30 and supplied from the basic circuit 27. Periodically (for example, 1m
(per second), a periodic reset circuit 31 composed of a pulse dividing circuit for giving a reset pulse to the basic circuit 27
And the symbol stop switch 5, the right generation / destruction switch 23, the count switch 24, and the start port switch 2.
5. A photosensor 26 for detecting a stop position of the distribution device 7 (see FIG. 1), a switch circuit connected to the diode and for supplying a signal from a switch selected by an applied address signal to the basic circuit 27 And an address decode circuit 29 connected to the basic circuit 27 and the switch circuit 28 for decoding an address signal supplied from the basic circuit 27 and supplying the decoded signal to the switch circuit 28.
An LED circuit 34 as a display means controlled by the basic circuit 27; a lamp switch circuit 35 including a lamp drive circuit according to the present invention, which is controlled by the basic circuit 27 and drives and displays lamps; A jackpot information output circuit 37 for receiving the jackpot information from the circuit 36 and the basic circuit 27 and outputting the jackpot information to the outside.
And a sound circuit 32 for receiving a sound signal from the basic circuit 27 and driving a speaker (not shown) to generate a game sound effect, and a motor circuit 33 for controlling the motor 22 for driving the distribution device 7. And The pachinko gaming machine is further connected to an AC 24V AC power supply,
Power supply circuit 38 for generating voltages of 12V, 21V and 30V
It is included.

The solenoid 21 shown in FIG. 2 is connected to the solenoid circuit 36. The side switch 16, the windmill lamp 17, the chucker lamps 18, 19, and the like are connected to the lamp switch circuit 35. The symbol displays 6a to 6c, the winning number display 13, the remaining number display 14, and the decoration LED 20 are connected to the LED circuit 34.

The basic circuit 27 and peripheral circuits shown in FIG. 3 operate as follows. The initial reset circuit 30 supplies an initial reset pulse to the basic circuit 27 at the same time when the power is turned on. The basic circuit 27 initializes itself in response to the initial reset pulse, generates a clock signal, and provides the clock signal to the periodic reset circuit 31. Periodic reset circuit 31
Divides the clock signal supplied from the basic circuit 27, generates a periodic reset pulse at predetermined time intervals, and supplies the reset pulse to the basic circuit 27. The basic circuit 27 repeatedly starts and executes a predetermined control program from its head each time a periodic reset pulse is given.

The game information given to the game machine control program in the basic circuit 27 is given from the symbol stop switch 5, the right generation / deletion switch 23, the count switch 24, the start port switch 25 and the like via the switch circuit 28. The basic circuit 27 responds to various kinds of control information given from the switch circuit 28, and operates as described above with reference to FIGS.
It controls a lamp switch circuit 35, a solenoid circuit 36, and the like.

The lamp switch circuit 35 includes each lamp 1
6 to 19, each of which includes a lamp switch circuit including a lamp drive circuit according to the present invention for controlling on / off of each lamp in response to a control signal provided from the basic circuit 27. FIG. 4 shows the ON / OFF state of the side lamp 16 as an example of the lamp switch circuit described above.
It is a connection diagram of the lamp switch circuit 35A for controlling turning off.

Referring to FIG. 4, lamp switch circuit 35
A rectifies an AC current supplied from an AC power supply of 24 V with the lamp drive circuit 39 of the embodiment of the present invention, and generates a pulsating flow whose magnitude pulsates within a range not affecting the operation of the lamp 16. And a rectifier circuit 40 for supplying the lamp 16.

The lamp drive circuit 39 has a GND terminal connected to the ground potential, an IN terminal to which a control signal from the basic circuit 27 is input, and an OUT terminal connected to one of the power terminals of the lamp 16. Including. One output terminal 40 </ b> B of the rectifier circuit 40 is grounded, and the other 40 </ b> A is connected to another one of the power supply terminals of the lamp 16.

FIG. 5 is a circuit block diagram of the lamp drive circuit 39. Referring to FIG. 5, the lamp driving circuit 39 includes:
As described above, the OUT terminal 42, the IN terminal 43, and the GN
And a D terminal 44. FET is used for the lamp drive circuit 39.
(Field effect transistor) 48 is included. The gate 48C of the FET 48 is connected to the IN terminal 43 and the source 4
8B is connected to the GND terminal 44, and the drain 48A is connected to the OUT terminal 42, respectively.

The lamp driving circuit 39 further includes an OUT terminal 42, a drain 48A of the FET 48, and a gate 48C.
An overvoltage protection circuit 45 connected to the
An overcurrent protection circuit 46 connected to the source 48B and the gate 48C of the FET 48;
The reset circuit 47 includes a drain 48A and a gate 48C of the ET 48, and a reset circuit 47 connected to the GND terminal 44.

The overvoltage protection circuit 45 is turned on when the potential difference between the pulsating current applied to the drain 48A of the FET 48 and the gate potential of the FET 48 becomes equal to or greater than a predetermined value. It is for lowering. This prevents the FET 48 and the lamp 16 from being destroyed by overvoltage.

When the current flowing from the OUT terminal 42 to the GND terminal 44 via the FET 48 becomes larger than a predetermined value, the overcurrent protection circuit 46 lowers the gate potential to limit the current flowing through the FET 48. To prevent destruction due to overcurrent.

The reset circuit 47 receives the FE signal from the OUT terminal.
When the current flowing to the GND terminal 44 via T48 suddenly increases due to, for example, a short circuit of the lamp, and the current limitation by the overcurrent protection circuit 46 becomes insufficient,
This is to cut off the FET 48 by lowering the gate potential to the ground potential.

FIG. 6 shows the lamp driving circuit 3 shown in FIG.
9 is a more detailed circuit diagram of FIG. Referring to FIG.
The gate 48C of 48 is connected to IN via resistors 52 and 57.
Connected to terminal 43. Source 48B of FET48
Are connected to the GND terminal 44. Also FET48
Is connected to the OUT terminal 42.

The overvoltage protection circuit 45 includes a Zener diode 67 connected in series between the drain 48A and the gate 48C of the FET 48, and diodes 66, 65, and 64.
And a resistor 63. The Zener diode 67 is connected to the FET 48 when the diodes 64 to 66 start conducting.
This is for adjusting the potential difference between the drain 48A and the gate 48C.

The overcurrent protection circuit 46 is connected in series between the drain 48A and the source 48C of the FET 48, and has two resistors 59, 60 for dividing a voltage between the drain 48A and the source 48C into a predetermined ratio. The base at the point of contact with 60 is F
The ET 48 includes an NPN transistor 61 having an emitter connected to the source 48C and a collector connected to the gate of the FET 48 via a resistor 62, and the resistor 57 described above. The contact between the resistor 62 and the gate of the FET 48 is referred to as a contact A.

The reset circuit 47 is connected in series between the drain 48A and the source 48C of the FET 48, and has two resistors 54 and 55 for performing a predetermined voltage division, and a base connected to the contact of the resistors 54 and 55, Emitter is FET48
The collector is connected to the source 48C of the
C, an NPN transistor 56 connected thereto, the resistor 52 described above, a contact point between the resistors 52 and 57, and the FET 48.
And a resistor 53 connecting the source 48C to the source 48C.

The contact between the resistor 57 and the FET 48 and the FE
A Zener diode 58 for stabilizing the IN voltage is included between the T48 and the source 48C. Note that the circuit shown in FIG. 6 is formed in one integrated circuit, and each resistor is a diffusion resistor formed by diffusing an impurity into a semiconductor substrate. It is shown in the form of W / L.

Referring to FIGS. 4 to 6, lamp driving circuit 39 according to the present invention operates as follows.

First, it is assumed that the voltage applied to the OUT terminal 42 is within a predetermined range. At this time, the transistors 56 and 61 are both off. Overvoltage protection circuit 4
5 is non-conductive. The control signal applied to the IN terminal 43 is supplied to the gate 48C of the FET 48 through the resistors 52 and 57.
Given to. A current whose magnitude is determined by the voltage applied to the OUT terminal 42 and the magnitude of the control signal applied to the gate 48C flows from the drain 48A to the source 48B of the FET 48. This current is passed through the lamp 16 as shown in FIG. 4 so that the lamp 16 is turned on / off by changing the control signal to change the current through the FET 48.

When an overvoltage is applied to the OUT terminal 42, the operation is as follows. When the potential difference between both ends of the overvoltage protection circuit 45 becomes equal to or more than a predetermined potential difference due to the overvoltage,
A current flows from the OUT terminal 42 to the connection line between the gate 48C and the IN terminal 43 via the overvoltage protection circuit 45. Therefore, the potential difference between both ends of the overvoltage protection circuit 45 becomes smaller than the original excessive potential difference, and an excessive voltage is applied to the FET 48 or an excessive voltage is applied to the lamp 16 so that the FET 48 or the lamp 16 It can be prevented from being destroyed. When the voltage applied to the OUT terminal 42 becomes equal to or less than a predetermined value, the overvoltage protection circuit 45 becomes conductive again.

The overcurrent protection circuit 46 operates as follows when an overcurrent flows through the FET 48 and the lamp may be destroyed. Since the current flowing through the resistors 59 and 60 also increases, the base voltage of the transistor 61 increases. When the current exceeds a predetermined value, the transistor 6
1 is turned on, and a current flows from the contact A to the GND terminal 44 via the resistor 62 and the transistor 61. The potential of the contact A becomes a low level, and drops to a potential at which the FET 48 does not turn off. In this case, because of the presence of resistor 62, F
The level of the control signal applied to the base of the ET 48 is reduced to some extent, and the current flowing through the FET 48 is limited. Therefore, even if an overcurrent flows in the circuit, the FE
T48 is unlikely to be destroyed by this overcurrent.

The reset circuit 47 operates as follows.
Normally, similarly to the transistor 61 of the overcurrent protection circuit 46, the transistor 56 is off. Resistance 54, 55
Is different from the division ratio of the resistors 59 and 60, and the voltage applied to the base of the transistor 56 is lower than the voltage applied to the base of the transistor 61. Therefore, even if an overcurrent flows to turn on the transistor 61, the transistor 56 does not turn on immediately. If the current further increases even if the overcurrent protection circuit 46 operates,
The voltage applied to the base of the transistor 56 becomes sufficiently high, and at this time, the transistor 56 is turned on for the first time. The transistor 56 is different from the transistor 61 of the overcurrent protection circuit 46 in that the contact between the resistors 52 and 57 is directly connected to the GND terminal 44. Therefore, when the transistor 56 is turned on, the gate of the FET 48 becomes the ground level,
FET 48 is completely shut off. There is no danger of the FET 48 being destroyed by the overcurrent.

Further, since the current supplied from the OUT terminal 42 is a pulsating current, if the overvoltage and the overcurrent are transient, the voltage applied to the OUT terminal 42 within a predetermined time is not more than a certain value. Become. As described above, this causes the overvoltage protection circuit 45 to be non-conductive. Transistor 5
The base potentials of the transistors 6 and 61 are also sufficiently lowered, and the transistors 56 and 61 are both turned off. The control signal applied to the gate of the FET 48 is no longer affected by the overcurrent protection circuit 46 and the reset circuit 47.
Reference numeral 48 controls the current flowing from the OUT terminal 42 to the GND terminal 44 according to the control signal supplied again via the IN terminal 43.

As described above, by using the lamp drive circuit 39 shown in FIGS. 4 to 6, it is possible to prevent an excessive current from flowing through the lamp 16 without using a fuse. Further, even if a fuse is not used, a switching element such as an FET 48 included in the lamp driving circuit 39 is not destroyed, and it is not necessary to replace the lamp driving circuit 39 every time an overcurrent flows. it can. As a result, even if an overvoltage is applied or an overcurrent flows once, a normal operation state can be immediately restored. Therefore, there is an effect that the game can be continued without interrupting the game for replacing the fuse, the lamp, and the lamp drive circuit.

As described above, the lamp drive circuit according to the present invention has been described by taking the lamp drive circuit used in the pachinko game machine as an example. However, the present invention is not limited to the above embodiment. For example, an electric device such as a lamp that does not significantly affect its operation even when the supplied current is a pulsating flow can be turned on / off using the switch circuit according to the present invention. In addition, even when an excessive current flows, the switch circuit can be prevented from being destroyed, and the operation of the gaming machine does not have to be interrupted.

The various lamps 16 to 19 described above , and
Even if the current supplied is a pulsating current like a lamp,
The electrical equipment which does not significantly affect the work, electrical apparatus thus driven to the gaming machine for driving circuits is configured. The overcurrent protection circuit includes a driving potential difference (drain).
Potential difference between the in 48A and the source 48B).
Of the voltage caused by the current flowing through the resistor (60)
Limiting the current according to the magnitude (transistor
61 is turned on / off to control the voltage applied to the gate 48C.
Limiting current through FET 48 by controlling voltage
Do). The switch cutoff means is provided with a
The current flows through the resistor (55) due to the potential difference.
The switching element according to the magnitude of the resulting voltage.
Control signal to the control terminal (transistor
The gate 48c is controlled by controlling the
To the ground voltage to reduce the voltage applied to
To a cutoff state). The Zener diode 58
To stabilize the control voltage input to the control terminal.
A zener diode is provided.

According to the first aspect of the present invention, the first
When the potential difference between the first terminal and the control terminal becomes larger than a predetermined value, the overvoltage protection circuit becomes conductive and the potential difference between the first terminal and the control terminal decreases. There is no fear of being destroyed. When the current flowing through the switch element becomes larger than the first magnitude, first, the magnitude of the current flowing through the switch element is limited by the overcurrent protection circuit. If this is not enough, the current through the switch is interrupted by the switch interrupting means. Therefore, even when a large current flows instantaneously, there is no possibility that the switching element will be destroyed. As a result, for example, it is possible to provide a game machine drive circuit that is not likely to be destroyed by overvoltage or overcurrent. According to the second aspect of the present invention, in addition to the effect of the first aspect, a pulsating potential difference is provided between the first terminal and the second terminal, so that the potential difference is normal. When the voltage falls within the range, the overvoltage protection circuit returns to the non-conductive state. In addition, when the current falls within the predetermined value, the overcurrent protection circuit and the switch cutoff unit return to the normal state, and the normal operation of the game machine drive circuit can be resumed. Therefore, there is no need to replace the fuse or the game machine drive circuit itself as in the related art. According to the invention as set forth in claim 3, claim 1 or
Is the overvoltage protection in addition to the effect of the invention described in claim 2.
When the protection circuit becomes conductive, the switch
Conduction between the first terminal of the slave and the control terminal
The first and second of the switching elements
The driving potential difference applied between the terminals
Current limiting operation of the overvoltage protection circuit.
Becomes possible. According to the present invention as set forth in claim 4, the claim
In addition to the effects of the invention according to any one of claims 1 to 3,
When the overvoltage protection circuit becomes conductive.
Also, the first terminal of the switch element and the control terminal
Switch only because there is conduction between the
Potential difference applied between the first and second terminals of the device
Does not become 0, and the
Control operation of shutting off the switching element. Claim
According to the fifth aspect of the present invention, any one of the first to fourth aspects is provided.
In addition to the effects of the invention described in the above, a Zener diode
The control input to the control terminal of the switch element
In order to stabilize the control voltage, operate the switch element as accurately as possible.
Control can be performed.

[0041]

[Brief description of the drawings]

FIG. 1 is a plan view of a game board of a pachinko game machine using a lamp drive circuit according to one embodiment of the present invention.

FIG. 2 is a rear view of the gaming machine shown in FIG.

FIG. 3 is a circuit block diagram showing a circuit for controlling the gaming machine shown in FIG.

FIG. 4 is a circuit diagram of a lamp switch circuit including a lamp drive circuit according to one embodiment of the present invention.

FIG. 5 is a block diagram of the lamp drive circuit shown in FIG. 4;

6 is a more detailed circuit diagram of the lamp driving circuit shown in FIG.

[Explanation of symbols]

16 is a side lamp, 35A is a lamp switch circuit, 3
9 is a lamp drive circuit, 40 is a rectifier circuit, 45 is an overvoltage protection circuit, 46 is an overcurrent protection circuit, 47 is a reset circuit,
Reference numeral 48 denotes an FET.

Claims (5)

(57) [Claims] 1. A game machine driving circuit for driving an electric device according to a predetermined control signal, comprising: a first terminal and a second terminal to which a driving potential difference is given;
A switch element having a control terminal to which the control signal is input, and a switch element for controlling conduction between the first and second terminals in response to the control signal; An overvoltage protection circuit that is connected between the first terminal and the control terminal and that is turned on in response to a voltage between the first terminal and the control terminal being equal to or higher than a predetermined value, and that is always non-conductive; An overcurrent protection circuit configured to limit a current flowing through the switch element when a current flowing through the switch element is equal to or greater than a predetermined first magnitude; and an overcurrent protection circuit connected to the switch element and flowing through the switch element. A switch interrupting means for applying, to the control terminal, a control signal for interrupting the switch element when the current is equal to or greater than a predetermined second magnitude greater than the first magnitude. . 2. A pulsating potential difference is applied to the first and second terminals, and the overvoltage protection circuit returns to a non-conductive state when an overvoltage is released and the pulsating potential difference becomes a predetermined value or less. The overcurrent protection circuit returns to a normal state in which an overcurrent is avoided and the pulsating potential difference becomes equal to or less than a predetermined value and the current is not limited, and the switch cutoff means releases the overcurrent and releases the overcurrent. 2. The game machine driving circuit according to claim 1, wherein when the pulsating potential difference becomes equal to or less than a predetermined value, the game device returns to a normal state in which a control signal for shutting off the switch element is not output. 3. The overcurrent protection circuit according to claim 1 , wherein
Caused by current flowing through a resistor due to potential difference
It is characterized in that the current is limited according to the magnitude of the voltage.
3. The gaming machine drive according to claim 1 or 2, wherein
Motion circuit. 4. The driving device according to claim 1 , wherein
Caused by the current flowing through the resistor due to the potential difference
Thereby blocking the switching element in accordance with the magnitude of that voltage
Providing a control signal to the control terminal.
The driving circuit for a gaming machine according to any one of claims 1 to 3.
Road. 5. The control voltage input to the control terminal is reduced.
To include a Zener diode to
The play according to any one of claims 1 to 4, characterized in that
Drive circuit for technical equipment.