JP5505144B2 - Power supply for gaming machines - Google Patents

Description

  The present invention relates to a power supply device for a gaming machine provided with a circuit that protects an internal circuit when an overvoltage is unexpectedly applied, and more specifically, a power supply device for a gaming machine that can achieve a long life while suppressing cost. About.

  In general, a 24V AC power is supplied to a pachinko machine as a gaming machine, and a 100V AC power is supplied to an intermediary machine such as a rental ball machine installed together with the pachinko machine. Thus, although the voltage to be supplied is different for each adjacent machine, the plugs connected to these machines are the same. For this reason, when an AC 100V power supply is mistakenly connected to the punchco machine, the internal circuit of the pachinko machine is damaged.

  For this reason, a power supply device as disclosed in FIG. 1 of Patent Document 1 below has been used.

  That is, with reference to FIG. 10, the power supply device 101 includes a main switch 102, a power supply circuit unit 104 that smoothes an AC voltage from the AC power supply 103 into a DC voltage, and supplies power to the inside of the gaming machine, A relay 105 provided between the power supply circuit unit 104 and the AC power supply 103, a relay drive circuit 106 for driving the relay 105, and a signal for turning off the contact of the relay 105 when an overvoltage is applied Is input to the relay drive circuit 106. The relay 105, the relay drive circuit 106, and the overvoltage detection circuit 107 constitute a part of the overvoltage protection circuit unit 108. Of the power supply circuit 104, 104a is a diode bridge, 104b is an electrolytic capacitor, 104c is a DC / DC converter, 104d is a second electrolytic capacitor, and 104e is a contact.

  In this power supply device 101, when an overvoltage is unexpectedly applied, the overvoltage detection circuit 107 detects the overvoltage and outputs a signal for turning off the relay 105 to the relay drive circuit 106, and the relay drive circuit 106 turns off the relay 105. To do. This operation prevents an overvoltage from being applied to the power supply circuit unit 104.

  By the way, since the power supply for the relay 105 in the power supply apparatus 101 needs to be smoothed for the stable operation of the relay 105, the diode bridge 109 and the electrolytic capacitor 110 are connected in the same manner as the power supply circuit unit 104. Prepare. Since this electrolytic capacitor 110 is required to have a withstand voltage that can withstand 100V, a small electrolytic capacitor 110 having a small electrostatic capacity but a high withstand voltage is used.

  On the other hand, since the electrolytic capacitor 104b of the power supply circuit unit 104 supplies power to the inside of the gaming machine, the electrolytic capacitor 104b having a larger capacitance than the electrolytic capacitor 110 of the overvoltage protection circuit unit 108 is used. It has been.

  Electrolytic capacitors have a shorter lifetime than other circuit components that can be used for a long period of time. Moreover, an electrolytic capacitor having a small electrostatic capacity generally has a shorter lifetime than a large electrolytic capacitor. Since such an electrolytic capacitor is mounted, the life of the circuit is determined by the life of the electrolytic capacitor, particularly a capacitor having a small capacitance.

JP 2007-14691 A

  In order to extend the life of the power supply device as described above, it is conceivable to change the electrolytic capacitor of the overvoltage protection circuit section having a relatively short life to a long-life capacitor such as a film capacitor or a ceramic capacitor.

  However, inconveniences such as high cost and large shape occur.

  In view of this, the main object of the present invention is to make it possible to extend the life while suppressing the cost.

  Means for that, the AC voltage from the AC power supply is smoothed to a DC voltage, and a power supply circuit unit that supplies power to the inside of the gaming machine, a relay provided between the power supply circuit unit and the AC power supply, A gaming machine power supply device comprising: a relay driving circuit that drives the relay; and an overvoltage detection circuit that inputs a signal for turning off the contact of the relay to the relay driving circuit when an overvoltage is applied, A power supply circuit unit and the relay drive circuit are connected to supply the voltage smoothed by the power supply circuit unit to the relay drive circuit, and a relay drive is provided between the relay drive circuit and the power supply circuit unit. This is a power supply device for a gaming machine provided with a current restricting portion that allows a current flow in the direction of supplying power to the circuit while preventing a current flow in the opposite direction.

  In this configuration, at the rated voltage, the relay drive circuit turns on the relay with the current from the AC power supply, and the current flows through the power supply circuit section. Then, the power that is converted into a DC voltage and smoothed in the power supply circuit unit is supplied to the relay drive circuit via the relay power supply path. For this reason, even if there is no dedicated electrolytic capacitor in the relay drive circuit, stable operation of the relay is performed. At this time, the current regulating unit does not block the flow of current.

  If an overvoltage is unexpectedly applied, a current flow that is opposite to the direction of supplying a voltage to the relay drive circuit tends to occur in the relay power supply path. Block the flow. In other words, the current regulating unit serves to regulate the relay power supply path to be used only as a path for supplying power to the relay drive circuit.

  According to the present invention, some parts for voltage smoothing can be omitted. In addition, a component for smoothing the voltage of the power supply circuit portion used for driving the relay has a longer life than a omitted component. Moreover, the withstand voltage of the parts for smoothing the voltage of the power supply circuit unit may be low.

  For this reason, cost can be held down. In addition, since the life of the power supply device can be matched with the components of the power supply circuit section having a long life, the life of the power supply device as a whole can be extended.

The wiring diagram of the power supply device for gaming machines. Explanatory drawing which shows the action state at the time of a rated voltage. Explanatory drawing which shows the action state at the time of an overvoltage. Explanatory drawing which shows the action state at the time of an overvoltage. The wiring diagram of a comparative example. Explanatory drawing of the action state at the time of the rated voltage in a comparative example. Explanatory drawing of the action state at the time of the rated voltage in a comparative example. Explanatory drawing which shows the action state at the time of the overvoltage in a comparative example. Explanatory drawing which shows the action state at the time of the overvoltage in a comparative example. The wiring diagram of a prior art.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a wiring diagram of a gaming machine power supply device 11 (hereinafter referred to as “power supply device”). As shown in FIG. 1, the power supply device 11 is a main switch for switching on and off the current from the AC power supply 12. 13, the AC voltage from the AC power supply 12 is smoothed by converting the AC voltage to a DC voltage, and the power supply circuit unit 14 that supplies power to the inside of the gaming machine, and when an overvoltage greater than the rated voltage is applied, it is detected and the current An overvoltage protection circuit unit 15 for blocking the flow is provided.

  The power supply circuit unit 14 includes a diode bridge 14a that converts an AC voltage into a DC voltage, and an electrolytic capacitor 14b that smoothes the voltage. In the figure, 14c is a DC / DC converter, and 14d is a second electrolytic capacitor.

  The overvoltage protection circuit 15 includes a relay 15a provided between the AC power supply 12 and the power supply circuit unit 14, a relay drive circuit 15b for driving the relay 15a, and when an overvoltage is applied. It has an overvoltage detection circuit 15c for inputting a signal for turning off the contact of the relay 15a to the relay drive circuit 15b, and a diode bridge 15d for converting an AC voltage into a DC voltage.

  The electrolytic capacitor 14 b of the power supply circuit unit 14 and the relay drive circuit 15 b of the overvoltage protection circuit unit 15 are connected by relay power supply paths 21 and 22. This is for supplying the power smoothed by the power supply circuit unit 14 to the relay drive circuit 15. That is, by providing the relay power supply paths 21 and 22, current flows back and forth between the electrolytic capacitor 14b and the relay drive circuit 15b as shown by a thin solid line in FIG.

  In order to prevent the relay power supply paths 21 and 22 from being used other than supplying power to the relay drive circuit 15b when a current flows through the relay power supply paths 21 and 22, A current regulating unit 23 is provided. This is to prevent an undesired current loop from occurring when an overvoltage is applied. While power supply from the electrolytic capacitor 14b to the relay drive circuit 15b is allowed, the current flow on the opposite side is allowed. Is to prevent.

  As shown in FIG. 1, the current restricting unit 23 includes only diodes 23a and 23b. As shown in FIG. 1, the current restricting unit 23 allows only current from the electrolytic capacitor 14b to the relay driving circuit 15b, and the relay driving circuit 15b performs electrolysis. It has a diode 23b that only allows current toward the capacitor 14b.

  As the diodes 23a and 23b, since the current flowing through the overvoltage protection circuit unit 15c is very small, an inexpensive diode having a small allowable current value can be used.

  In the power supply device configured as described above, when the main switch 13 is turned on at the rated voltage, current flows as shown by the thin solid arrow 51a and the broken arrow 51b in FIG. 2, and power is supplied to the relay drive circuit 15b. The relay 15a is turned on. The solid line arrow 51a and the broken line arrow 51b correspond to the solid line a or the broken line b shown in the diagram showing the voltage on the right side of FIG. The alternate long and short dash line c in the figure indicates the rated voltage. The same applies hereinafter.

  When the relay 15a is switched on, a current flows as indicated by the arrows of the solid line 52a and the broken line 52b, and the electrolytic capacitor 14b of the power supply circuit unit 14 stores electric charges. While power is supplied to the gaming machine, power is supplied to the relay drive circuit 15 b through the relay power supply paths 21 and 22 as indicated by the thick solid arrow 53. Thereby, the operation of the relay 15a is stabilized.

  At this time, the diodes 23a and 23b of the relay power supply paths 21 and 22 allow the current flow to the relay drive circuit 15b.

  If an overvoltage is applied, as shown in FIG. 3, the overvoltage detection circuit 15c detects the overvoltage and switches off the relay 15a via the relay drive circuit 15b. Supply is cut off. For this reason, as indicated by the solid line arrow 54a, the current that has entered the power supply circuit section 14 from the AC power supply 12 via the main switch 13 flows from the electrolytic capacitor 14b toward the relay 15a. Blocked. On the other hand, current tends to flow from the electrolytic capacitor 14 b through the relay power supply path 22 to the overvoltage protection circuit unit 15. This flow is opposite to the direction when power is supplied from the electrolytic capacitor 14b to the relay drive circuit 15b.

  However, the current flow is blocked by the diode 23 b of the relay power supply path 22. As a result, a current loop in which current circulates does not occur. Therefore, the circuit component is not damaged by the overvoltage flowing, and adverse effects on the gaming machine can be prevented.

  Further, as shown in FIG. 4, the overvoltage detection circuit 15c detects the overvoltage and switches off the relay 15a via the relay drive circuit 15b, so that the power supply to the gaming machine is cut off. For this reason, as indicated by the broken-line arrow 54b, the current tends to flow from the AC power supply 12 toward the relay 15a, but the current is interrupted by the relay 15a. On the other hand, the current flowing through the relay drive circuit 15 b tends to flow through the relay power supply path 21 to the power supply circuit unit 14. This flow is opposite to the direction when power is supplied from the electrolytic capacitor 14b to the relay drive circuit 15b.

  However, the current flow is blocked by the diode 23a of the relay power supply path 21. As a result, a current loop in which current circulates does not occur. Therefore, the circuit component is not damaged by the overvoltage flowing, and adverse effects on the gaming machine can be prevented.

  In order to show such an effect, a comparative example will be described next with reference to FIGS. In this description, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In order to extend the life of the power supply device 11, the electrolytic capacitor 110 (see FIG. 10) of the overvoltage protection circuit unit 15 having a relatively short life is omitted, and the relay power supply path 21 as shown by a bold line in FIG. 5. , 22 is not a problem at the rated voltage, but inconvenience occurs when an overvoltage is applied.

  That is, according to the configuration having only the relay power supply paths 21 and 22 as described above, when the main switch 13 is turned on as shown in FIG. 6, at the rated voltage, as in the case described with reference to FIG. As indicated by the arrows of the solid line 51a and the broken line 51b, power is supplied to the relay drive circuit 15b, and the relay 15a is turned on.

  When the relay 15a is turned on, similarly to the case described with reference to FIG. 2, the electric charge is accumulated in the electrolytic capacitor 14b of the power supply circuit 14 as shown by the arrows of the solid line 52a and the broken line 52b in FIG. As indicated by an arrow 53, power is supplied to the relay drive circuit 15b through the relay power supply paths 21 and 22. Thereby, the operation of the relay 15a is stabilized.

  However, when an overvoltage is applied, an unexpected current loop occurs, and a circuit component having a withstand voltage lower than the applied overvoltage is damaged.

  Specifically, at the time of overvoltage, as shown in FIG. 8, the current that has entered the power supply circuit section 14 from the AC power supply 12 through the main switch 13 is transferred from the electrolytic capacitor 14b to the relay 15a as indicated by the solid line arrow 54a. On the other hand, a current loop that flows through the relay power supply path 22 to the overvoltage protection circuit unit 15 and the AC power supply 12 is generated.

  Then, a part of the diode bridge 14a of the power supply circuit unit 14 on the current loop, the electrolytic capacitor 14b, the DC / DC converter 14c, and a part of the diode bridge 15d in the overvoltage protection circuit unit 15 are It will be damaged.

  9, the current flows from the AC power supply 12 toward the relay 15a, while flowing through the overvoltage protection circuit section 15 and through the relay power supply path 21, so that the power supply circuit section 14 flows. And a current loop is created which flows through the main switch 13 to the AC power supply 12.

  Also in this case, a part of the diode bridge 15d of the overvoltage protection circuit unit 15 on the current loop, the electrolytic capacitor 14b in the power supply circuit unit 14, the DC / DC converter 14c, and a part of the diode bridge 14a. Will be damaged.

  As is clear from comparison with this comparative example, in the power supply device 11 provided with the current regulating unit 23 in the relay power supply paths 21 and 22, when an overvoltage is applied, it is based on the detection of the overvoltage detection circuit 15c. Thus, it is possible to protect the power supply circuit unit 14 by switching off the relay 15a and to prevent an unexpected current loop from damaging the circuit components. In addition, since the electrolytic capacitor dedicated to the relay drive circuit 15b is omitted and the electrolytic capacitor 14b of the power supply circuit unit 14 is used for the relay drive circuit 15b, the number of electrolytic capacitors can be suppressed and the cost can be reduced. be able to. Although the diodes 23a and 23b are separately provided in the relay power supply paths 21 and 22, the diodes 23a and 23b may be small for a minute current, so that a cost reduction effect can be obtained.

  The conventional electrolytic capacitor for the relay drive circuit 15b has to be used with a high withstand voltage, but is not necessary, and has a small capacitance and a relatively short life. There is no need to use. On the other hand, since the electrolytic capacitor 14b having a large capacitance used for the power supply circuit unit 14 is used, the power supply device 11 as a whole is based on an electrolytic capacitor having a short life only for the relay drive circuit. In comparison, the life is extended.

  In this way, it is possible to extend the life of the power supply device 11 while suppressing costs.

  Further, since the necessary electrolytic capacitors 14b and 14d are provided only in the power supply circuit section 14, they may be replaced when the electrolytic capacitors 14b and 14d deteriorate. In this case, the electrolytic capacitors 14b and 14d Since the number is small and only the power supply circuit unit 14 needs to be targeted, the operation is easy.

  The above is one form for implementing this invention, This invention is not limited only to the said structure, Other structures can also be employ | adopted.

  For example, the current regulating unit may be configured by using a circuit component such as a transistor as appropriate in addition to the diode alone.

DESCRIPTION OF SYMBOLS 11 ... Power supply device for game machines 12 ... AC power supply 14 ... Power supply circuit part 15a ... Relay 15b ... Relay drive circuit 15c ... Overvoltage detection circuit 21, 22 ... Relay power supply path 23 ... Current control part 23a, 23b ... Diode

Claims (2)

An AC voltage from an AC power supply is smoothed to a DC voltage, and a power supply circuit section for supplying power to the inside of the gaming machine, a relay provided between the power supply circuit section and the AC power supply, and driving the relay A gaming machine power supply device having a relay drive circuit and an overvoltage detection circuit that inputs a signal for turning off the relay contact when the overvoltage is applied to the relay drive circuit,
A relay power supply path for supplying the power smoothed by the power circuit section to the relay drive circuit is provided,
A gaming machine provided with a current restricting section for allowing a current flow in a direction in which a voltage is supplied from the power supply circuit section to the relay drive circuit in the relay power supply path, while preventing a current flow in the opposite direction. Power supply. The power supply device for a gaming machine according to claim 1, wherein the current regulating unit is configured by a diode.

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