JPH0572230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to solve the following problems.

(Industrial Application Field) This invention relates to a control circuit for a ball hitting solenoid in a pachinko machine.

(Prior art) In the control circuit for the ball-striking solenoid in a conventional pachinko machine, a switch circuit that rectifies alternating current, converts it into direct current at a constant voltage using a constant voltage circuit, and repeatedly opens and closes the direct current. In the case where the ball is supplied to the ball-hitting solenoid through a 2-way circuit for repeated ball-hitting operations, when the solenoid is repeatedly energized, the temperature of the solenoid gradually rises and its DC resistance increases. As the resistance increases, the direct current flowing through the solenoid decreases little by little. As a result, the torque of the solenoid for hitting the ball becomes smaller each time the ball is hit compared to the first time, causing a problem in that the flight distance of the ball changes, causing players to feel dissatisfied.

(Problems to be Solved by the Invention) This invention eliminates the above-mentioned problems of the conventional technology, and provides a method for hitting the ball with a constant batting force, even at the initial stage or as time passes, when hitting the ball one after another. It is an object of the present invention to provide a control circuit for a ball hitting solenoid in a pachinko machine which allows the ball hitting solenoid to perform operations.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) The pulse oscillation circuit repeatedly outputs pulses in response to the operation signal. The intermittent reference waveform signal generation circuit receives the pulse and generates a reference waveform signal. After the signal passes through an error amplification circuit, a comparison circuit pulse-width modulates the sawtooth wave from the sawtooth wave oscillation circuit. The modulation signal is applied to a switch circuit, and the switch circuit is intermittently turned on. Due to the conduction, direct current from the rectifier circuit flows to the solenoid. The current detection circuit detects the current flowing through the solenoid and provides a current value signal to the error amplification circuit.
The current value signal is used to correct the signal sent from the error amplification circuit to the comparison circuit. the result,
The value of the current flowing through the solenoid corresponds to the reference waveform signal.

(Example) Below, drawings showing examples of the present application will be described. In Fig. 1 showing the front of the pachinko machine and Fig. 2 showing the back of the ball hitting device, 1 is a pachinko machine;
2 shows the board surface, 3 shows the ball guide, and 4 shows the ball hitting device. In the ball hitting device 4, 6 is a base plate, which is attached to the base frame of the pachinko machine 1. 7 shows a ball hitting solenoid attached to the board 6. In this, 8 is a fixed iron core, 9 is a coil wound around the fixed iron core 8, 10 is a rotating shaft, and a ball hitting solenoid 7
As is well known, it is rotatably supported by a bearing (not shown). Reference numeral 11 indicates a rotor attached to the rotating shaft 10. Next, reference numeral 12 indicates a batting rod connected to the rotating shaft 10 of the solenoid 7, and reference numeral 14 indicates a stopper attached to the base plate 6. Next, 15 indicates a distance adjusting device. In this, 16 is a shaft rotatably attached to the base plate 6, and a pachinko machine 1 is attached to one end of the shaft.
An adjustment handle 17 is attached to the front side of the handle. Reference numeral 18 denotes a receiving piece attached to the shaft 16 for receiving the batting rod 12. By operating the handle 17, the position can be changed as shown in FIG. It is now possible to change. 19 is a tension spring, and the receiving piece 18
This is for pulling back to the position shown by the solid line in FIG.

In the pachinko machine 1 having the above configuration, the ball hitting solenoid 7 is intermittently energized (that is, the coil 9 is intermittently energized) from a control circuit that will be described later. When the coil 9 is energized as described above, the magnetic flux generated by the coil 9 is transferred to the rotor 1 via the fixed iron core 8.
1 and the rotor 11 is indicated by the arrow A shown in FIG.
turned in the direction. As a result, the ball batting rod 2 swings from the position shown by A to the position shown by B in FIG. After hitting the ball as described above, the ball batting rod 12 returns to the position where it is received by the receiving piece 18 by its own weight or, if necessary, by the biasing force of a spring connected to the ball hitting rod 12 or the rotating shaft 10. Such an operation is performed each time the coil 9 is intermittently energized, and the balls are successively launched toward the board surface 2. In the above case, by moving the receiving piece 18 toward the position shown by the imaginary line in FIG. 2 to any desired position using the handle 17, the position for receiving the returned batting rod 12 can be changed in various ways. I can do it. This makes it possible to variously change the driving force applied to the ball batting rod 12 when the coil 9 is energized and the ball batting rod 12 performs a ball hitting operation, and the driving force of the ball at the above-mentioned launching position can be adjusted as desired. can be adjusted to

Next, FIG. 3 showing a control circuit for the ball hitting solenoid 7 will be explained. In the control circuit 21, 22 is an input terminal of an AC power supply, which is connected to, for example, a 24V AC supply line. 23 is a connection end to which the solenoid 7 (coil 9) is connected. 24 is a rectifier circuit, for example, a full-wave rectifier circuit using a diode bridge. 25 is a switch circuit, for example, a switching transistor Q1 is used. Reference numeral 26 denotes a current detection circuit, which includes, for example, a current detection resistor RS. 27 indicates a diode for reflux. Next, 31 is an input terminal for an operation signal, which is connected to, for example, the adjustment handle 17 shown in FIG. 1 above. 32 is a well-known touch sensor circuit, and 33 is a pulse oscillation circuit which intermittently outputs pulses at predetermined ball batting intervals. Note that the number of times is set within 100 times per minute, for example, 98.5 times, according to regulations. Reference numeral 34 denotes an intermittent reference waveform signal generation circuit, which generates a waveform signal whose wavefront has a gentle curve and rises to a constant reference voltage in response to the signal from the pulse oscillation circuit. This circuit is a transistor Q
2. It is composed of a capacitor C and resistors R1 and R2 for voltage division. 35 is a well-known error amplification circuit;
It consists of an error amplifier 36 and a feedback resistor RF. 37 is a well-known sawtooth wave oscillation circuit, which is designed to oscillate a sawtooth wave of, for example, 10kHz. Reference numeral 38 denotes a well-known comparison circuit, which is constructed using a comparator 39. Reference numeral 40 denotes a constant voltage power supply circuit, which is a circuit for supplying operating and reference power to each of the circuits.

Next, the operation of the control circuit 21 having the above configuration will be explained. When the AC power is turned on, a rectified DC voltage is output from the full-wave rectifier circuit 24, and this voltage is stabilized by the constant voltage power supply circuit 40 and supplied to each circuit.

If the adjustment handle 17 is not touched and therefore no operation signal is input to the input terminal 31, the touch sensor circuit 32 will not produce an output, and therefore the pulse oscillation circuit 33 will not output a negative logic pulse, and the transistor Q2 is in the on state. Therefore, there is no input on the non-inverting input side of the error amplifier 36,
Its output side is at ground level, and the output side of comparator 39 is also at ground level. As a result, transistor Q1 is turned off,
The rotary solenoid coil 9 is not energized.

Next, when an operation signal is input to the input end 31 by touching the adjustment handle 17, the following operation is performed. The waveforms of each circuit in this case are as shown in FIG.
The touch sensor circuit 32 produces an output in response to a manipulation signal. Then, from the pulse oscillation circuit 33,
Negative logic pulses are output within 100 times. The intermittent reference waveform signal generation circuit 34 outputs a reference waveform signal every time it receives the negative logic pulse. That signal and
The solenoid current value signal obtained as a voltage generated across the current detection resistor RS of the current detection circuit 26 is input to the error amplifier 36 of the error amplifier circuit 35, and from the error amplifier 36, a signal determined by the difference between them is input. is output. This output is compared with the output of the sawtooth wave oscillation circuit 37 by the comparator 39, and if the output of the error amplifier 36 is larger than the output of the sawtooth wave oscillation circuit 37, the sawtooth wave is transmitted from the output terminal of the comparator 39 to the error amplifier 36. A pulse width modulated output is output according to the output voltage level of. To explain this based on FIG. 5 of the drawing, when the voltage level from the error amplifier 36 is high at point a, an output as shown in FIG. 5 b is produced, and when the voltage level from the error amplifier 36 is low at point a produces an output as shown in FIG. 5c. Comparator 3
The output from the solenoid 9 is applied as a switch signal to the control terminal of the switch circuit 25, that is, to the base of the transistor Q1, and as it is repeatedly turned on and off, a voltage is applied to the solenoid coil 9. The ON and OFF states of the transistor Q1 are as shown in FIG. As indicated by the arrow in Fig. 3, the current can continue to flow through the solenoid coil 9 by circulating through the diode 27 (b in Fig. 6).
reference). In this way, the solenoid coil 9
The current flowing through is detected in the form of a voltage generated across the current detection resistor RS, and the detected value (current value signal) is inputted to the non-inverting input side of the error amplifier 36 as described above. As a result of such closed loop control, the current flowing through the solenoid coil 9 has a value that accurately corresponds to the reference waveform signal.

As a result of the above control being performed every time a negative logic pulse is generated from the pulse oscillation circuit 33,
The above-mentioned current repeatedly flows through the coil 9,
The ball hitting operation by the solenoid 7 is repeated.

Next, the operation of the intermittent reference waveform signal generation circuit 34 will be explained. In this circuit 34, when a negative logic pulse is input from the pulse oscillation circuit 33, it turns off the transistor Q2. Then, the capacitor C is charged by the direct current supplied from the constant voltage power supply circuit 40 through the resistor R1, and the voltage at the point P increases sequentially from the ground level by a time constant (CR constant) determined by the resistors R1, R2 and the capacitor C. , the output voltage of the constant voltage power supply circuit 40 and the resistance R1,
The voltage rises to the reference voltage set by the voltage division ratio of R2. This time limit setting is set to be sufficiently longer than the time limit at which the constant current function of the constant current power supply circuit 30 becomes effective, so that the period from the moment when the pulse oscillation circuit 33 outputs a negative logic pulse until the constant current operation is performed. Regardless of external factors, current with the same waveform can be applied to the solenoid coil 9, and a stable and constant torque can always be generated in the rotary solenoid 7. To reiterate, when the transistor Q1 is made conductive continuously, the current i flowing through the solenoid coil 9
When the output voltage of the rectifier circuit 24 is V, the inductance of the solenoid coil 9 is L, the DC resistance of the solenoid coil 9 is R, and the time is t, i=V/R (1-e ^-R/L t) becomes. However, at point P, the current i rises with a time constant (see Fig. 7c) that is larger than the time constant of the rise of the current i (see Fig. 7b) when the ball hitting solenoid 7 generates heat; Output voltage of constant voltage power supply circuit 40 and resistors R1 and R2
A signal with a waveform that is a predetermined reference voltage determined by the voltage division ratio of , that is, a reference waveform signal is obtained, and the signal is sent from the intermittent reference waveform signal generation circuit 34 to the error amplification circuit 35
It is configured to be output to. The transistor Q1 is turned on and off with a pulse width based on the signal, and the average current value to the solenoid coil 9 is controlled. Therefore, even if the solenoid coil 9 generates heat and its DC resistance, inductance, etc. change, the solenoid coil 9
A current with the same waveform can be applied to the ball every time, and the same hitting torque can be generated every time.

(Effects of the Invention) As described above, in the present invention, when a pachinko player wants to play by hitting a ball, the pulse oscillation circuit 33 repeatedly outputs pulses by giving an operation signal, and solenoid 7
It has the advantage that the solenoid 7 can be operated repeatedly by repeatedly energizing it. This has the effect of being able to hit the balls one after the other and providing the player with sufficient fun.

Moreover, when hitting the ball repeatedly as described above, when the solenoid 7 is repeatedly energized, the temperature of the solenoid 7 gradually rises and its DC resistance increases. Although the torque gradually decreases as mentioned above,
In the present invention, due to the presence of the intermittent reference waveform signal generation circuit 34, the current detection circuit 26, and the error amplification circuit 35, the rise of the current of the solenoid 7 is limited from the beginning based on the rise of the current of the solenoid over time. , the solenoid 7 has the feature that it can start flowing current at a constant rise every time, and in addition, each of the above-mentioned circuits 34, 26, 3
5, the current after the start-up can be kept constant every time, and as a result, the batting force of the solenoid can be kept constant both at the beginning of hitting and after some time has elapsed, which improves the flight of the ball. This has the effect of keeping the distance constant and giving satisfaction to the players.

Furthermore, since the intermittent reference waveform signal generation circuit is constructed of a simple circuit consisting of a combination of a transistor, a capacitor, and a voltage dividing resistor, the capacitor is activated in response to the input of a negative logic pulse from the pulse oscillation circuit. It is possible to output a signal with a waveform that rises to a reference voltage with a gentle wavefront and a constant rise through instantaneous discharge. ) makes it possible to increase the output voltage of the constant voltage power supply circuit by the reference voltage set by the voltage division ratio of the voltage dividing resistor. Therefore, the above time limit setting enables the constant current function of the constant current power supply circuit consisting of the above intermittent reference waveform signal generation circuit, error amplification circuit, sawtooth wave oscillation circuit, comparison circuit, and switch circuit. By setting it sufficiently longer than the time limit, the solenoid coil will always have the same waveform, despite the rise in solenoid coil temperature that occurs from the time when the pulse oscillation circuit outputs a negative logic pulse until it starts current operation. Since current can be applied to the rotary solenoid, it is possible to always generate a stable and constant torque. As a result, the ball hitting force of the solenoid can be maintained constant even at the initial point of the ball hitting operation and even after time has elapsed.
This has the effect of making the flight distance of the ball constant and giving the player a sense of satisfaction.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application; FIG. 1 is a front view of a pachinko machine, FIG. 2 is a rear view of a ball hitting device,
FIG. 3 is a block circuit diagram of the control circuit, and FIGS. 4 to 7 are waveform diagrams for explaining operation. 9... Solenoid coil, 33... Pulse oscillation circuit, 34... Intermittent reference waveform signal generation circuit, 35
...error amplifier circuit, 37 ... sawtooth wave oscillation circuit, 38 ... comparison circuit, 25 ... switch circuit,
26... Current detection circuit.

Claims (1)

[Claims] 1 The ball hitting solenoid in a pachinko machine has
Between the input terminal of the AC power supply, a rectifier circuit,
A switch circuit for conducting and cutting off the direct current from the rectifier circuit to the coil of the solenoid in response to a switch signal sent to its control terminal is connected in series, and the coil of the solenoid is connected in series. A current detection circuit is connected to detect the current value flowing through the coil and output a current value signal, and a pachinko machine equipped with a ball hitting solenoid is provided with an input end for receiving an operation signal. A pulse oscillation circuit that receives an operation signal and repeatedly outputs pulses at predetermined batting intervals is connected between the control terminal of the switch circuit and the control terminal of the switch circuit. A transistor, a capacitor, and a resistor for voltage division are connected between the terminal and the coil. An intermittent reference waveform signal generation circuit that receives pulses from the pulse oscillation circuit and repeatedly generates a signal with a waveform of an error amplification circuit that receives a current value signal, compares the two, and outputs a signal corresponding to the difference between the two; a signal from the error amplification circuit; and a sawtooth wave signal from a separately provided sawtooth wave oscillation circuit. The present invention is characterized by comprising a constant current power supply circuit which is connected in sequence to a comparator circuit which accepts the pulse width of the former, modulates the pulse width of the latter, and supplies the modulated signal to the control terminal of the switch circuit as a switch signal. A control circuit for the ball hitting solenoid in a pachinko machine.