JPH07116304A - Protection circuit of pachinko game machine - Google Patents

Abstract

PURPOSE:To prevent breakage of a peripheral circuit related to the supply of a.c. power of a pachinko game machine, which is caused by overvoltage. CONSTITUTION:A keying circuit 5 switches on a relay 2 to supply the power if the voltage value of the power supply to a pachinko game machine is not out of predetermined tolerance, and electrostatic noise included in the supplied power is absorbed by a capacitor 6 or induced to be earthed. On the other hand, if it is out of the tolerance, the relay 2 is put in the off state to make it impossible to supply the power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a pachinko machine protection circuit used for protecting an electric circuit for driving a pachinko machine.

[0002]

2. Description of the Related Art In recent years, a pachinko machine has a CPU as a main component, and electronic parts such as a memory, a transistor, an LED, a solenoid, and a capacitor control the operation of each controlled member to stimulate the five senses of a player. , The playability is expanded.

A pachinko machine is generally driven by an electric power of 24V AC, which inputs domestic (100V AC) or commercial (200V AC) electric power currently used in Japan to the primary side of the transformer and the secondary side. I am using a voltage drop from.

Each of the above-mentioned transformers can supply power to about 10 to 15 pachinko machines, and the transformers are arranged on the back side of the pachinko machines for general reasons.

By the way, the mainstream of plugs for receiving electric power provided in the pachinko machines are the models formed in the same shape as those of electric appliances prevailing in Japan. It is easy to supply commercial power or commercial power.

Further, an accident may occur on the pachinko machine side or the transformer side for some reason, and a voltage exceeding the input rated value may be applied to the pachinko machine. If such an excessive voltage is applied, electronic components such as the CPU, which is a key component of the components, is destroyed and the pachinko machine becomes unusable, resulting in extremely large damage.

Therefore, conventionally, a protection circuit (hereinafter referred to as a protection circuit) for a pachinko machine is provided on the pachinko machine side or the transformer side to protect the above-mentioned components from the power supply of an excessive voltage value.

As a first conventional example of this protection circuit, a protection circuit including a thyristor, a diode and a fuse is connected between a pachinko machine and a power supply source, and the fuse is blown when an excessive voltage is applied to the pachinko machine and the power supply. The sources are separated (see JP-A-63-5417 and JP-A-63-35121).

As a second conventional example, an extremely large-capacity capacitor and a Zener diode that conducts when an overvoltage is applied are provided between a pachinko machine and a power supply source, and a delay time required for charging and discharging the capacitor when the power is turned on is provided. Overvoltage is detected by Zener diode using
It is divided by a thyristor (Japanese Patent Laid-Open No. 64-2757).
9 and JP-A-1-91617).

[0010]

However, in the above-mentioned first conventional example, the fuse is not instantly blown after an excessive voltage is applied to the pachinko machine, but a predetermined value is set after the power is turned on. After the lapse of the delay time, the fuse is blown and the pachinko machine and the power supply source are disconnected.

Therefore, from the time when the power is turned on to the time when the delay time elapses, an excessive voltage is still applied to the components of the pachinko machine, and the destruction of electronic parts cannot be avoided.

When a fuse is blown, a new fuse must be attached to the protection circuit. For that work, 10 to 15 pachinko machines are searched for the protection circuit of the machine. Since the replacement work will be started later, it is difficult to make the work more efficient, and the economical problem that the fuse is certainly consumed remains.

In the second conventional example, the external shape of the capacitor tends to increase due to the necessity of providing the delay time, which makes it difficult to reduce the mounting area of the protection circuit. .

Further, when the thyristor is used in the protection circuit, when the thyristor is turned on and off, the commercial power is reduced to 2%.
This causes a problem in that noise is generated at a frequency twice as high, and the components of the pachinko machine may malfunction due to the noise.

Therefore, an object of the present invention is to provide a protection circuit for a pachinko machine used for protecting the pachinko machine from the application of an overvoltage with a simple structure.

[0016]

In order to achieve the above-mentioned object, the present invention provides a power supply source for supplying alternating-current power to a pachinko machine and a supply state in which the electric power is supplied by being interposed between the pachinko machine and the power. A supply / stop circuit that takes one of a supply stop state in which supply is stopped, and the supply / stop circuit when the voltage value of the power supplied to the pachinko machine is not outside a predetermined allowable range. The supply / stop circuit is placed between the power supply source and the ground when the supply / stop circuit is out of the allowable range and the supply / stop circuit is in the supply disabled state, and the supply is provided in the supply state. Absolute to absorb the electrostatic noise contained in the power supplied by the stop circuit, and when the electrostatic noise is saturated due to the absorption, the bypass of the electrostatic noise is connected to the ground. It has a configuration comprising a server circuit.

At least one of the open / close circuit and the supply / stop circuit is provided with an informing member for informing of the inoperable state.

At least the opening / closing circuit and the absorber circuit have a structure formed by an integrated circuit.

[0019]

Since the present invention is configured as described above, the switching circuit disables the supply / stop circuit when the voltage value of the power supplied to the pachinko machine is out of the predetermined allowable range. Since it does not, the power outside the rating is not supplied to the pachinko machine, and if it is not outside the allowable range, the supply / stop circuit is made to be in the supply state, so the pachinko machine is supplied with the rated power, The electrostatic noise contained in the supplied electric power is absorbed by the absorber circuit, and when the absorber circuit is saturated with the electrostatic noise due to this absorption, the electrostatic noise is induced to the ground.

In the case where at least one of the switching circuit and the absorber circuit is provided with a notifying member for notifying the supply failure state, it can be perceived that the overvoltage is applied to the pachinko machine by the notifying member.

In the configuration in which at least the switching circuit and the absorber circuit are formed by an integrated circuit, the protection circuit is easily handled and the mounting area is reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a protection circuit for a pachinko machine according to the present invention will be described below with reference to FIGS.
FIG. 1 shows a protection circuit (hereinafter, protection circuit) 1 of the present invention provided in a pachinko machine (not shown).

The protection circuit 1 is interposed between a power supply source (not shown) for supplying AC power to the pachinko machine and the pachinko machine. The power supply source is composed of a transformer or the like that supplies 24 V AC power from the secondary side to the pachinko machine.

The protection circuit 1 is composed of a relay 2 as a supply / stop circuit and an integrated circuit 3.
Is connected to a light emitting diode 4 as a notification member, and the integrated circuit 3 controls the relay 2 and the light emitting diode 4, respectively.

The relay 2 has a supply state in which electric power is supplied to the pachinko machine depending on whether or not a current is supplied to the built-in coil from the switching circuit 5 shown in FIG. The power supply to the power supply is stopped.

In the switching circuit 5, two capacitors 6 and 6 surrounded by virtual lines as an absorber circuit are connected in series as a noise absorbing member, and seven external terminals T1 to T7 are provided. In this way, the switching circuit 5 and the capacitors 6, 6
By forming the protection circuit 1 with the integrated circuit 3, the protection circuit 1 can be easily handled and the mounting area on the substrate or the like can be reduced as compared with the case where the protection circuit 1 is configured by individual components.

The switching circuit 5 includes a diode group 7, resistors 8 to
11, a Zener diode 12, a photocoupler 13, a diode 14, and a transistor 15, and T1 to T7 denote external terminals provided in the integrated circuit 3.

The diode group 7 rectifies the alternating current input from the external terminals T1 and T3, so that the external terminals T1 and T3 are rectified.
A bridge is formed between T3, and the voltage of the rectified power is supplied to the photocoupler via resistors 8 and 9 connected in series.
Applied between 13 input / output terminals. In addition, T2 is a ground terminal and is connected between both capacitors 6 and 6.

Therefore, the capacitors 6 and 6 are interposed between the power supply source and the ground and absorb the electrostatic noise contained in the power supplied by the relay 2 when in the supply state. When the electrostatic noise is saturated, the bypass of the electrostatic noise can be grounded.

A Zener diode 12 is arranged in parallel with the resistor 9 between the resistor 9 side end of the resistor 8 and the LED / anode side input of the photocoupler 13, and the resistor is connected from the photocoupler 13 side. A resistor 10 is connected between the LED and the anode and cathode of the photocoupler 13 so that the resistor 10 is connected in the forward direction.

The breakdown voltage value of the Zener diode 12 is determined on the basis of the allowable voltage of the pachinko machine, and the fine value thereof constitutes the integrated circuit 3 including the resistance values of the resistors 8 to 11. It depends on the characteristics of each electronic component.

External terminals T4 and T5 are relays 2 shown in FIG.
For connecting the coils of the two external terminals T
A diode 14 is connected between 4 and T5 in the forward direction from the external terminal T5 side to the external terminal T4.

The collector of the transistor 15 is connected to the external terminal T5, the emitter of the transistor 15 is connected to the external terminal T7, and the resistor 11 is connected between the emitter and the base.
However, the base is connected to the input side end of the photocoupler 13 between the resistor 9 and the resistor 10, respectively.

The external terminal T7 is for connecting the light emitting diode 4 together with the external terminal T6. The light emitting diode 4 has its anode side connected to the external terminal T6 and its cathode side connected to the external terminal T7.

The protection circuit 1 of the present invention thus configured
In order to use, when AC power within the allowable voltage value of the pachinko machine is supplied from the external terminals T1 and T3,
The Zener diode 12 and the photo coupler 13 are in the OFF state.

As a result, the light emitting diode 4 is also in the OFF state, and the transistor 15 is turned on by the bias of the resistors 9 and 11.
Since the N state is set, the relay 2 is changed from the OFF state to the ON state, that is, the supply state, and the electric power is supplied to the pachinko machine.

On the other hand, the AC power that deviates from the allowable voltage value of the pachinko machine and exceeds the upper limit of the voltage is external terminals T1 and T3.
, The zener diode 12 is turned on, the light emitting diode 4 is turned on, and the transistor 15 is turned off.

As a result, the relay 2 is also in the OFF state, that is, in the supply disabled state, so that electric power is not supplied to the pachinko machine and an excessive voltage is not applied to the pachinko machine. Further, the O of the light emitting diode 4 described above
The N state can visually inform that the power supply source having an excessive voltage is erroneously connected to the protection circuit 1.

Subsequently, by stopping the electric power of the excessive voltage and newly connecting the electric power within the allowable voltage value to the protection circuit 1, it is possible to immediately perform the operation as described above without performing the replacement work such as the fuse (not shown). Power can be supplied to the pachinko machine.

Further, since the switching circuit 5 is not provided with a thyristor, the thyristor does not become a noise source of the protection circuit 1 unlike the above-mentioned conventional example, and the power supplied to the protection circuit 1 is not consumed. Even if electric noise is included, the electrostatic noise is absorbed by the capacitors 6 and 6.

When the capacitors 6 and 6 are saturated with electrostatic noise due to absorption of the electrostatic noise, the electrostatic noise has a bypass of the electrostatic noise grounded through the external terminal T2. Therefore, the electrostatic noise after the capacitors 6 and 6 are saturated is induced to the ground, so that the malfunction of the pachinko machine due to the electrostatic noise can be suppressed.

In this embodiment, the supply / stop circuit is composed of the relay 2 and the case where the electric power is supplied or stopped to the pachinko machine based on the ON / OFF of the relay 2 has been described, but the present invention is not limited to this. Not something.

As the supply / stop circuit, instead of the relay 2, it is possible to control the supply / non-supply of electric power by an electronic component having a switch function, such as a transistor and a switch gate integrated into a circuit.

Further, as in the above embodiment, the light emitting diode 4
Supply instead of connecting to the switching circuit 5 in the integrated circuit 3.
The configuration may be such that it is connected to the stop circuit side. In this case, supply
It suffices to configure a circuit for turning on or off the light emitting diode 4 based on the supply / stop of the supply to the pachinko machine by the stop circuit.

As a noise absorbing member, a surge absorber, a varistor or the like may be provided in addition to the capacitors 6 and 6.

[0046]

Therefore, the present invention is configured as described above, and when the voltage value of the electric power supplied to the pachinko machine is out of the predetermined allowable range, the fuse is blown and the pachinko machine and the power supply source are blown. Instead of dividing the space, the supply / stop circuit is made unusable by the switching circuit with a simple structure, while if it is not out of the allowable range, the pachinko machine is supplied with the rated power and supplied. When the electrostatic noise contained in the electric power is absorbed by the absorber circuit and the absorber circuit becomes saturated with the electrostatic noise, the electrostatic noise can ground the bypass.

Therefore, even if an overvoltage is applied to the pachinko machine by mistake, not only is the electronic component forming the pachinko machine and its control circuit reliably protected to prolong the life of the product, but it is possible to confirm that the overvoltage has been applied. It can be perceived by the notification member, and the pachinko machine operates immediately only by changing the power supply with the incorrect voltage value of the corresponding pachinko machine to the power supply with the normal voltage value.

Therefore, it is possible to search for a pachinko machine whose fuse has been blown out from a large number of pachinko machines, and to omit the work of installing a new fuse. The economic effect of eliminating the consumption of

Further, as described above, the electrostatic noise is absorbed by the absorber circuit or induced to the ground, so that the malfunction of the pachinko machine caused by the electrostatic noise can be suppressed,
Product reliability is improved.

In the case where at least one of the switching circuit and the absorber circuit is provided with a notifying member for notifying the supply failure state, it is possible to perceive whether the overvoltage is applied to the pachinko machine by the notifying member. After perceiving that the electric power is applied, the electric power having the normal voltage value can be immediately supplied to the pachinko machine, and the workability is prevented from being deteriorated.

In the structure in which at least the switching circuit and the absorber circuit are formed by an integrated circuit, the protection circuit can be easily handled, the mounting area can be reduced, and the protection circuit can be easily miniaturized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of the present invention.

FIG. 2 is a circuit diagram showing an example of the integrated circuit of FIG.

[Explanation of symbols]

 1 Protection Circuit 2 Relay 3 Integrated Circuit 4 Light Emitting Diode 5 Switching Circuit 6 Capacitor

Claims (3)

[Claims] 1. A power supply source for supplying alternating-current power to a pachinko machine and a supply state in which the electric power is supplied, which is interposed between the pachinko machines, and a supply stop state in which the power supply is stopped. In the case where the supply / stop circuit and the voltage value of the electric power supplied to the pachinko machine are not out of the predetermined allowable range, the supply / stop circuit is set to the supply state and out of the allowable range. An opening / closing circuit that makes the supply / stop circuit in the supply-disabled state, and electrostatic noise included in the power supplied by the supply / stop circuit interposed between the power supply source and the ground when in the supply state. And an absorber circuit that absorbs the electrostatic noise and saturates the electrostatic noise due to the absorption to attach a side path of the electrostatic noise to the ground. Protection circuit. 2. The pachinko machine protection circuit according to claim 1, wherein at least one of the open / close circuit and the supply / stop circuit is provided with a notifying member for notifying the supply failure state. 3. The pachinko machine protection circuit according to claim 1, wherein at least the switching circuit and the absorber circuit are formed by an integrated circuit.