JPH10146424A - Solenoid driving circuit for pachinko machine ball shooting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption by arranging a control circuit in a chopper circuit so that the input current to be fed into the input end of the chopper circuit is detected to prevent any over-current from entering into the element for switching the pressure-drop chopper circuit. SOLUTION: A voltage from the input power supply 1 is switched by the switching element 2, which is then rectified via the reactor 4, rectifier diode 3 and rectifier condenser 5, thus, feeding a power to the solenoid 6 that becomes a load. Then, controlling the duty factor of the switching element 2 adjusts the power to be fed into the solenoid 6 to adjust a force striking the balls to an optimal value desired by the player. Since the switching element just continuously switches a voltage from the input power supply, the power lost by switching is only consumed, thus, enabling the consumption power to be reduced in the solenoid driving circuit for launching the PACHINKO machine balls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving circuit for a solenoid for controlling a ball hitting force in a pachinko machine.

[0002]

2. Description of the Related Art Conventionally, a solenoid has been used for hitting a ball in an electric pachinko machine, and the hitting force is controlled by changing the resistance value of a variable resistor operated by a player using a steering wheel. doing. Further, such an electric pachinko machine is required to fire pachinko balls at a predetermined cycle, for example, to fire pachinko balls about 100 times per minute. Therefore, a switching control transistor connected to a pulse generation circuit is connected to the solenoid, and the switching control transistor is operated by the pulse generation circuit so that the switching control transistor is normally turned on and off 100 times per minute, and the solenoid is driven to drive the ball. To blow. That is, when the player operates the steering wheel, the resistance of the variable resistor changes, and the voltage applied to the solenoid or the current flowing through the solenoid is controlled to adjust the striking force for striking the ball.

[0003] The hitting force adjusting circuit has a real value of 6-27927.
For example, a series regulator circuit as disclosed in Japanese Unexamined Patent Publication No. Hei 6-86849 or a constant current circuit as disclosed in Japanese Unexamined Patent Publication No. Hei 6-86849 is used.

The series regulator circuit controls the voltage applied to the solenoid to adjust the striking force, while
The constant current circuit adjusts the striking force by controlling the current flowing through the solenoid.

[0005] These striking force adjusting circuits apply an input voltage (Vin) 1 from an input power supply to a power transistor (Q 2) 1.
It is stabilized at 8. Power transistor (Q2)
A control resistor (R1) connected in series to the 18 emitters
Reference numeral 19 denotes detecting the current flowing through the solenoid 6 connected in series with the power transistor (Q2) 18 and the control resistor (R1) 19, and restricting the current flowing through the power transistor (Q2) 18 to the power transistor (Q2). 18 has the effect of suppressing the collector loss PQ1C and suppressing abnormal heat generation.

[0006]

However, in all the circuit systems represented by this equivalent circuit, power is consumed by the power transistor (Q2) 18 as shown in the operation waveform of the power transistor in FIG. Since a stable electric power for generating a hitting force necessary for the player to hit the ball is supplied to the solenoid, the power loss per pachinko machine becomes large.

Since a number of pachinko machines are installed in an amusement store, heat is trapped at the place where the pachinko machines are installed, and the ambient temperature rises, so that the reliability of electronic components used in the pachinko machines is significantly reduced.

Further, since the power transistor (Q2) 18 generates heat, heat treatment is required with a heat sink or the like, and it is difficult to reduce the size. Furthermore, the power consumption of the entire amusement shop where many pachinko machines are installed becomes very large, which causes environmental destruction.

If a well-known step-down chopper circuit operating at several tens to several hundreds of kHz is used, power consumption is reduced. However, when firing a single ball, a large current flows through the solenoid. That is, since a large current flows intermittently at a rate of about 100 times per minute, an excessive current flows to the solenoid driving circuit for pachinko machine hitting,
It has not been put to practical use because a defect may occur.

Therefore, the present invention has a function of solving the above-mentioned problems by being small in size and consuming less power, and also capable of preventing accidents such as ignition and smoking even when electronic components are destroyed due to a load short circuit. The present invention is to provide a solenoid drive circuit for pachinko machine ball hitting having the following.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has the following features. That is, (1) a step-down chopper circuit including a reactor, a capacitor, a diode, a switching element, and a resistor is provided, and the step-down chopper circuit steps down a power supply voltage to supply power to a balling solenoid. A pachinko ball driving solenoid driving circuit, which detects an input current supplied to an input terminal of the chopper circuit and controls a circuit for controlling an overcurrent not to flow into a switching element of the step-down chopper circuit. And a solenoid driving circuit for pachinko balls.

(2) A solenoid driving circuit for pachinko ball hitting provided with a step-down chopper circuit, an overcurrent prevention circuit, and a striking force adjusting circuit, wherein the solenoid driving circuit for ball hitting pachinko machine converts an AC power supply. The step-down chopper circuit includes a pair of input terminals to which DC power is input, and a pair of output terminals for supplying drive power to a solenoid, wherein the step-down chopper circuit includes one of the pair of input terminals and the one of the pair of input terminals. A series circuit of a switching element and a reactor inserted between one of the output terminals, a capacitor connected to the pair of output terminals, and a connection point between the switching element and the reactor in the series circuit. Releasing energy stored in the reactor between the other output terminal of the pair of output terminals during an off period of the switching element; And a control circuit for controlling the operation of the switching element. The striking force adjusting circuit is connected between the pair of output terminals, and includes a variable resistor and a resistor. Circuit, the overcurrent prevention circuit has a current detection resistor connected in series to the series circuit of the switching element and the reactor, the control circuit detects a voltage obtained from the voltage dividing circuit, Controlling the duty factor of the switching element by comparing with a reference voltage included in the control circuit, and when the peak value of the current detected by the current detection resistor reaches a predetermined value, the switching element is turned off. This is a solenoid driving circuit for pachinko balls that has the function of performing the following.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS By providing a step-down chopper circuit in a solenoid driving circuit for pachinko ball hitting, the step-down operation is mainly performed by the switching operation of the switching element, and the power loss of the switching element is reduced by the saturation voltage of the switching element. There are only a few of them due to leakage current or leakage current.

[0014] Therefore, since there is no need for a large heat sink which generates less heat and the reliability of the electronic components does not decrease, it is possible to provide a small and highly reliable solenoid driving circuit for hitting a pachinko machine.

If an overcurrent prevention circuit is provided to control the overcurrent so as not to flow through the switching element, abnormal heating can be prevented and safety can be improved.

[0016]

Next, the present invention will be described in more detail with reference to the drawings.

FIG. 1 (a) shows an equivalent circuit of a solenoid driving circuit for pachinko ball hitting according to the present invention.

A voltage from an input power supply (Vin) 1 is switched by a switching element (Q1) 2, and rectified by a reactor (L) 4, a rectifying diode (CR1) 3, and a rectifying capacitor (C1) 5 to be connected to a load. Solenoid (L
o) Supply power to 6.

At this time, the power supplied to the solenoid can be adjusted by controlling the duty factor of the switching element (Q1) 2, and the hitting force for hitting the ball is adjusted to an optimum value required by the player. Can be.

The switching element (Q
The operation waveforms of 1) and 2 are shown in FIG. Since the switching element (Q1) 2 merely continuously switches the voltage from the input power supply (Vin) 1, the switching element (Q1) 2 itself does not consume power in principle, and actually does not consume power. However, only a small amount of power of switching loss is consumed.

Therefore, by using a step-down switching circuit that operates as shown in this equivalent circuit to adjust the power applied to the solenoid (Lo) 6, the power consumption of the solenoid driving circuit for pachinko balling is reduced. be able to.

FIG. 2 is a conceptual diagram showing the construction of a solenoid driving circuit for pachinko ball hitting using a step-down switching circuit having the equivalent circuit.

The solenoid driving circuit for pachinko ball hitting comprises a step-down chopper circuit 14, an overcurrent prevention circuit 9 and a striking force adjusting circuit shown in FIG. By passing through, a DC equivalent to the input power supply (Vin) 1 shown in the equivalent circuit is input to a pair of input terminals of a solenoid driving circuit for pachinko ball hitting, and a DC voltage is supplied to the step-down chopper circuit 14.

A pair of output terminals of the solenoid driving circuit for pachinko ball hitting is connected to a series circuit of a solenoid 6 for pachinko ball hitting and a transistor 11 for switching control, and a transistor 11 for switching control by a pulse generating circuit. Is turned on, driving power is supplied to the solenoid 6 to hit a pachinko ball.

The step-down chopper circuit 14 includes a switching element 17, a reactor, a capacitor provided for releasing energy to the solenoid 6, a diode for releasing energy stored in the reactor, and a control circuit for controlling the switching element 17. 12 are provided.

The switching element 17 has a main electrode of the switching element connected in series with the reactor, and has one terminal of a pair of input terminals and one terminal of an output terminal of the solenoid driving circuit for pachinko ball hitting. Inserted between.
The capacitor is connected between the pair of output terminals, and the other terminal of the pair of input terminals and the other terminal of the pair of output terminals are directly connected. The diode connects the cathode side to the connection point between the switching element and the reactor, and connects the anode side to the connection point side between the other terminal of the pair of input terminals and the other terminal of the pair of output terminals. The energy stored in the reactor can be released to the capacitor.

The striking force adjusting circuit is a voltage dividing circuit composed of a variable resistor and a resistor. The voltage dividing circuit is connected between a pair of output terminals of a solenoid driving circuit for pachinko ball hitting. The impact force is controlled by adjusting.

The overcurrent prevention circuit 9 is a circuit having a current detecting resistor connected in series with the switching element 17 and a series circuit of the reactor, and detects a triangular wave current (FIG. 1B) flowing through the switching element. A first transistor that is turned on when the peak value of the current reaches a predetermined value; and a first transistor that is turned on when the first transistor is turned on.
The second transistor is turned on and turns off the switching element 17.

Further, the control circuit 12 provided in the step-down chopper circuit takes out the detection voltage output from the voltage dividing circuit, compares it with the reference voltage 13 provided in the control circuit 12, and controls the switching element. It has become.

Here, when the switching element 17 of the solenoid driving circuit for pachinko machine hitting shown in FIG. 2 is turned on, a triangular current flows in the switching element 17 as shown in FIG. Is accumulated and the capacitor connected between the pair of output terminals is charged.

At this time, the moment the solenoid 6 is driven,
Or immediately thereafter, the charge of the capacitor decreases (the voltage across the capacitor decreases), the current flowing through the switching element 17 increases, and the peak value of the triangular waveform current tends to increase. However, the overcurrent prevention circuit 9 operates to detect the peak value of the triangular waveform current, the switching element 17 is turned off, and the current flowing through the switching element 17 is limited.

Since the energy stored in the reactor is released through the diode during the off period of the switching element 17, the peak value of the triangular current similarly increases during the next on period of the switching element 17. I do. Therefore, the overcurrent prevention circuit 9 operates similarly and the current flowing through the switching element 17 is limited. As described above, in the solenoid driving circuit for pachinko machine hitting, the overcurrent prevention circuit always operates and controls the overcurrent while the electric charge required for the capacitor is charged.

Further, while the solenoid is not driven, that is, while the switching control transistor is off, the capacitor is charged with a constant current, and the terminal voltage of the capacitor rises in a predetermined curve. As the terminal voltage of the capacitor rises, the output terminal voltage of the solenoid driving circuit for pachinko balling increases, and the detection voltage obtained by the voltage divider circuit adjusted by the player also increases. The detected voltage is compared with a reference voltage 13 provided in a control circuit 17 to control the switching element 17 to control an output voltage of a solenoid driving circuit for pachinko ball hitting, thereby obtaining a stable arbitrary striking force. It becomes possible.

Further, even in an abnormal state caused by a short-circuit of a solenoid as a load, the overcurrent prevention circuit 9 operates to prevent abnormal heat generation and enhance safety.

[0035]

According to the present invention, it is possible to prevent accidents such as ignition and smoking even when electronic components on the load side are destroyed or the like, because of their small size and low power consumption. Further, an overcurrent generated when the solenoid is operated about 100 times per minute, which is a feature of the solenoid driving circuit for pachinko balling, is adjusted by an overcurrent prevention circuit built into the solenoid driving circuit for pachinko balling. It became possible.

Conventionally, overcurrent was protected by an adjusting resistor connected in series with a solenoid, so that power loss due to the adjusting resistor could not be avoided. However, in the present invention, overcurrent is prevented by switching operation of a switching element. Therefore, power consumption can be further reduced.

[Brief description of the drawings]

FIG. 1 is an equivalent circuit of a solenoid driving circuit for pachinko machine ball hitting according to the present invention.

FIG. 2 shows an embodiment of the present invention.

FIG. 3 is an equivalent circuit diagram of a conventional solenoid driving circuit for pachinko balling.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input power supply 2 Switching element 3 Rectifier diode 4 Reactor 5 Rectifier capacitor 6 Solenoid 7 AC power supply 8 Rectifier smoothing circuit 9 Overcurrent prevention circuit 10 Variable resistance which a player adjusts with a steering wheel 11 Switching control transistor 12 Control circuit 13 Reference Voltage 14 Step-down chopper circuit 15 Divider resistor 16 Divider resistor 17 Switching element 18 Power transistor 19 Control resistor

Claims (2)

[Claims] A step-down chopper circuit comprising a reactor, a capacitor, a diode, a switching element, and a resistor is provided, and the step-down chopper circuit steps down a power supply voltage to supply power to a balling solenoid. A pachinko ball driving solenoid driving circuit, which detects an input current supplied to an input terminal of the chopper circuit and controls a circuit for controlling an overcurrent not to flow into a switching element of the step-down chopper circuit. A solenoid driving circuit for pachinko balls, which is provided inside. 2. A pachinko machine ball-hitting solenoid drive circuit comprising a step-down chopper circuit, an overcurrent prevention circuit, and a striking force adjusting circuit, wherein the pachinko machine-ball-hitting solenoid drive circuit converts an AC power supply into a DC power. The step-down chopper circuit includes a pair of input terminals to which power is input, and a pair of output terminals for supplying drive power to a solenoid, wherein the step-down chopper circuit includes one of the pair of input terminals and the one of the pair of input terminals. A series circuit of a switching element and a reactor inserted between one output terminal of the output terminals, a capacitor connected to the pair of output terminals, and a connection point between the switching element and the reactor in the series circuit; Between the other output terminal of the pair of output terminals, the energy stored in the reactor is released during the off period of the switching element. And a control circuit for controlling the operation of the switching element. The striking force adjusting circuit is connected between the pair of output terminals, and includes a voltage divider composed of a variable resistor and a resistor. The overcurrent prevention circuit has a current detection resistor connected in series to a series circuit of the switching element and the reactor, and the control circuit detects a voltage obtained from the voltage dividing circuit, and Controlling the duty factor of the switching element by comparing it with a reference voltage included in the control circuit, and turning off the switching element when the peak value of the current detected by the current detection resistor reaches a predetermined value. Solenoid drive circuit for pachinko balls, characterized by having the function of: