JPH10112927A - Power protector for pachinko machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To materialize the initial introduction of a pachinko machine and convenience of test, etc., by interposing an overvoltage protector which supplies power as it is for the rated input voltage, and breaks the power supply to load side in case that the input voltage over rating is added, between the power terminal on the main body side of a pachinko machine and a power plug. SOLUTION: A power protector 1 comprises a female plug 2 to connect with the power terminal on the main body side of a pachinko machine, a power connection cord 3, an overvoltage protector 4 made of synthetic resin interposed between the power connection cords 3, and a power plug 5 connected to the end of the power connection cords 3. Inserting the plug 2 into the plug socket 13 on power supply side after connecting the plug 2 to the power terminal on the side of the pachinko machine will make the overvoltage protector 4, which breaks the power on load side in case that the input voltage over the rating is added, break the power supply In case that the rated input voltage is added through the power plug 5, a Zener diode 7 enables the normal power supply merely by showing the role of the absorption of normal surge voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply protection device for protecting a power supply circuit of a pachinko machine.

[0002]

2. Description of the Related Art In general, the power supply of pachinko machines in Japan is as follows.
AC 24V is used. The supply of electric power to the pachinko machine is performed by using household electric power and an AC 10 using a transformer.
It is often used by lowering 0V to 24V.

However, power plugs connected to a pachinko machine via a power supply connection cord are mainly manufactured in the same shape as those of electric appliances widely used in Japan.

[0004] For this reason, a voltage far exceeding the input voltage is erroneously applied to the pachinko machine via the plug for the power supply, and the electronic circuit of the pachinko machine may be damaged, resulting in a great economic loss.

[0005] As a countermeasure, a countermeasure has been proposed and implemented in which a power supply voltage overvoltage protection circuit is provided on the side of the pachinko machine. However, by providing this overvoltage protection circuit in each of the pachinko machines, it is regrettable that the number of man-hours for manufacturing the pachinko machines is increased and the pachinko machines cannot be manufactured economically.

[0006]

SUMMARY OF THE INVENTION In the present invention, an overvoltage protection device is provided independently of a pachinko machine to facilitate the initial introduction or testing of a pachinko machine.

[0007]

According to the present invention, when a rated input voltage is applied, power is supplied to the load as it is, and when an input voltage exceeding the rated voltage is applied, power is supplied to the load. The overvoltage protection device to be shut off is interposed between the power supply terminal on the pachinko machine main body side and the power supply plug.

[0008]

In order to supply power to the pachinko machine side, when an input voltage exceeding the rating is applied via a power plug, the power supply is stopped by the overvoltage protection device which cuts off the power supply to the load side. It is cut off and the overvoltage does not spread to the pachinko machine.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An overvoltage protection device is interposed between a power supply plug connected to an end of a power supply connection cord and a power supply connection terminal of a pachinko machine main body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of one embodiment of the present invention, in which a power protection device 1 for a pachinko machine includes a female plug 2 connected to a power terminal on a pachinko machine main body side and power connection cords 3 and 3. And an overvoltage protection device 4 made of synthetic resin interposed between the power supply connection cords 3 and 3 and a power supply plug 5 connected to an end of the power supply connection cord 3.

The outer shape of the overvoltage protection device 4 is formed in a substantially rectangular parallelepiped shape of a two-piece type and is connected in series to the power supply connection cords 3 as shown in the electric circuit diagram of FIG. The circuit comprises an overvoltage detection cutoff circuit 8 composed of a fuse 6 and a Zener diode 7 connected in parallel with the connection cords 3 and 3.

A retainer 11 for forming a bottomed cylindrical hole 4a is provided at the lower stage of the overvoltage protection device 4 in the figure.
In addition, a cylindrical fuse 6 and connection pieces at both ends can be attached,
The zener diode 7 formed in a columnar shape can be simultaneously loaded. A female screw portion is formed in the opening of the cylindrical hole 4a.
It holds the Zener diode 7.

The fuse 6 has a capacity corresponding to the power consumption of the pachinko machine main body. The zener diode 7 is located as close as possible to the power supply voltage of the pachinko machine.
Those having a somewhat high Zener voltage are desirable.

Here, in order to supply power to the pachinko machine side, the plug 2 is connected to, for example, a power terminal of the pachinko machine side having a rated voltage of 24 V, and then the power plug 5 is inserted into the outlet 13 on the power supply side. When an input voltage exceeding the rating, for example, 100 V is applied, the power supply is cut off by the overvoltage protection device 4 that cuts off the power supply to the load side.

That is, a current caused by an excessive voltage exceeding the Zener voltage flows into the Zener diode 7 connected in parallel to the power supply connection cords 3 and 3, which breaks down and short-circuits the fuse, thereby causing the fuse 6 to be blown. I do. At this time, since the Zener diode 7 has an effect of absorbing a surge voltage, an overvoltage does not spread to the pachinko machine side.

Next, when a rated input voltage is applied via the power plug 5, the Zener diode 7 only serves to absorb a normal surge voltage and enables normal power supply.

When the overvoltage is applied, the fuse 6 and the Zener diode 7 are damaged and consumed, so the screw cover 12 is removed and the fuse 6 and the Zener diode 7 are easily removed.
Can be exchanged.

FIG. 3 is a perspective view of another embodiment. In this embodiment, as in the previous embodiment, the power supply protection device 1 for a pachinko machine comprises a female plug 2 connected to a power terminal on the side of the pachinko machine, power connection cords 3, 3, and a power connection cord 3, And a power plug 5 connected to an end of the power supply connection cord 3.

The outer shape of the overvoltage protection device 4 is substantially the same as that of the above embodiment in the form of a two-piece, generally stepped rectangular parallelepiped. As shown in the circuit block diagram of FIG. Switch circuit 14 for opening and closing the power supply to the side
And the switch circuit 1 only when a rated input voltage is applied.
4 comprises a gate circuit 15 and a voltage detection circuit 16. These circuits are operated by a DC power supply obtained by the rectifier 17 to facilitate control.

An electromagnetic relay 18, which is the output of the switch circuit 14, is plugged into the socket 21 and held at the lower stepped portion of the overvoltage protection device 4. A display 22 is mounted on the side surface by a light emitting element LED when an overvoltage is applied.

The voltage detection circuit 16 includes a DC power supply circuit including a zener diode, a resistor, and an LED display 2.
2, a gate circuit 15 having a switching function by a photocoupler is connected in parallel with the LED.
The output of the gate circuit 15 is connected to the base of the output transistor connected in series to the electromagnetic relay 18 at the output of the switch circuit 14, which is pulled up by a resistor.

Here, as described above, in order to supply power to the pachinko machine side, the plug 2 is connected to the power terminal of the pachinko machine side having a rated voltage of 24 V, for example, and then the power plug 5
Is inserted into the outlet 13 on the power supply side, when an input voltage exceeding the rating, for example, 100 V is applied, a voltage exceeding the Zener voltage of the Zener diode of the voltage detection circuit 16 is applied, and a current flows. The connected display 22 is turned on to warn a warning, the output transistor of the photocoupler of the gate circuit 15 is turned on, the base voltage of the output transistor of the switch circuit 14 is set to a low level, and the electromagnetic relay 18 is energized. Not done.

Next, when a rated input voltage is applied via the power plug 5, no current flows through the Zener diode of the voltage detection circuit 16, and the output transistor of the photocoupler of the gate circuit 15 becomes non-conductive, and Circuit 14
A pull-up current flows into the base of the output transistor, the output transistor is turned on, and the electromagnetic relay 18 is energized. The operation of the electromagnetic relay 18 enables normal power supply via this contact.

Further, a switching transistor may be used instead of the photocoupler of the gate circuit 15. Further, instead of the electromagnetic relay 18, a power MOSFE
A semiconductor switch such as T may be used. FIG. 5 shows an example using a semiconductor switch. An output transistor 24 is mounted on a heat sink 23 at the relay holding position in the above embodiment.

FIG. 6 is a perspective view of another embodiment. As in the previous embodiment, the power supply protection device 1 for a pachinko machine includes a female plug 2 connected to a power terminal on the pachinko machine main body side,
The power supply cable includes power supply cords 3, 3, an overvoltage protection device 4 made of synthetic resin interposed between the power supply cords 3, 3, and a power plug 5 connected to an end of the power supply cord 3.

The outer shape of the overvoltage protection device 4 is of the same type as that of the above-described embodiment, and is configured as a substantially stepped rectangular parallelepiped of two-piece type. On this side, an LED 22 for displaying an overvoltage is displayed.
Is provided. The internal electric circuit configuration is, as shown in the circuit block diagram of FIG. 7, a switch 25 composed of an electromagnetic relay having a contact 25a for opening and closing power supply to the load side.
And a meter relay 26 that closes the contact 26a only when a rated input voltage is applied, and the display 22 is connected to a power supply circuit.

Here, as described above, in order to supply electric power to the pachinko machine side, the plug 2 is connected to the power terminal of the pachinko machine side having a rating of 24 V, for example, and then the power plug 5
When an input voltage exceeding the rating, for example, 100 V is applied, the indicator 22 is turned on to prompt a warning, but the contact 26a is not closed and the contact 26a is opened and closed by an electromagnetic relay. The container 25 is not closed, and no overvoltage is supplied to the pachinko machine side.

Next, when a rated input voltage is applied via the power plug 5, the display 22 does not light up or only dimly shines because of the low voltage. At the same time, the contact 26a is closed by the input of the rated input voltage, and the switch 25 formed of an electromagnetic relay is energized. Normal power supply is enabled via the contact 25a. Further, a contact point of the meter relay 26 for overvoltage may be provided, and the switch 25 may be interlocked for overvoltage, so that the switch 25 may be self-held with a time delay.

In the above-described embodiment, the overvoltage protection device is connected between the power supply connection cords 3 and 3. However, as shown in FIG. 8, the overvoltage protection device may be directly provided with the power plug 5 as shown in FIG. good. The example shown in the circuit block diagram can be downsized if a semiconductor integrated circuit is used.

[0030]

The present invention contributes to the effective use of equipment because it is not necessary to modify a large number of pachinko machines, and when an input voltage exceeding the rating is applied via a power plug, the load is reduced. Since the power supply to the power supply terminal on the side of the pachinko machine main body is effectively cut off, devices including the electronic circuits in the pachinko machine main body are protected. Also,
In the case where a fuse or the like is consumed when an overvoltage is detected, there is an advantage that replacement is easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is an electric circuit diagram of the embodiment of FIG.

FIG. 3 is a perspective view of another embodiment of the present invention.

FIG. 4 is a circuit block diagram of the embodiment in FIG. 3;

FIG. 5 is a perspective view of another embodiment of the present invention.

FIG. 6 is a perspective view of another embodiment of the present invention.

FIG. 7 is a circuit block diagram of the embodiment in FIG. 6;

FIG. 8 is a perspective view of another modified embodiment of the present invention.

[Explanation of symbols]

 1: Power supply protection device 3: Power supply connection cord 4: Overvoltage protection device 5: Power supply plug 6: Fuse 7: Zener diode 8: Overvoltage detection cutoff circuit 11: Cage 14: Switch circuit 15: Gate circuit 16: Voltage detection circuit 18: Electromagnetic relay 25: Switch 26: Meter relay

Claims (7)

[Claims] An overvoltage protection device that supplies power directly to a load when a rated input voltage is applied and shuts off power supply to a load when an input voltage exceeding the rated voltage is applied. A power protection device for a pachinko machine, which is interposed between a power terminal on a machine body side and a power plug. 2. The overvoltage protection circuit according to claim 1, wherein the overvoltage protection device is an overvoltage detection cutoff circuit comprising a fuse connected in series to the power supply connection cord and a zener diode connected in parallel to the power supply connection cord. Power protection device for pachinko machines. 3. The power supply protection device for a pachinko machine according to claim 2, wherein the overvoltage detection cutoff circuit is constituted by a holder capable of simultaneously loading a fuse and a zener diode. 4. The overvoltage protection device comprises a switch circuit for opening and closing power supply to a load side, and a voltage detection circuit including a gate circuit for closing the switch circuit only when a rated input voltage is applied. The power supply protection device for a pachinko machine according to claim 1. 5. The pachinko machine according to claim 1, wherein the overvoltage protection device comprises a switch for switching power supply to the load side and a meter relay for closing the switch only when a rated input voltage is applied. Power protection device. 6. The power protection device for a pachinko machine according to claim 4, wherein the output of the switch circuit is constituted by an electromagnetic relay. 7. The power protection device for a pachinko machine according to claim 4, wherein the output of the switch circuit is constituted by a semiconductor switch.