JPH0550949B2 - - Google Patents

Description

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

(Industrial Application Field) The present invention relates to a ball hitting device for hitting balls toward a board in an electric pachinko machine.

(Prior art) In the ball hitting device of a conventional electric pachinko machine, the direct current obtained by rectifying the alternating current is always made into a constant voltage direct current by a constant voltage circuit, and then the direct current is passed through a switch circuit that repeatedly opens and closes the direct current. In a ball-hitting solenoid shown in FIG. 11, which is supplied to the coil 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 compared to the first time.
There is a problem that the flight distance of the ball changes, and for this reason, the player not only finely adjusts the starting position adjustment cam to adjust the flight distance of the ball, but also adjusts the starting position adjustment cam to compensate for changes in the driving force of the rotor. There was a problem in that the adjustment had to be taken into consideration, and the adjustment operation caused dissatisfaction. In addition, when the solenoid described above causes the rotor 18f to rotate in the direction of the arrow by passing current through the coil 15f, the magnetic pole 12f
In addition to the magnetic flux extending from the corner 13f to the salient pole 19f of the rotor 18f, there is also a magnetic flux extending from the corner 14f to the salient pole 19f. There was a problem with low torque. This impeded miniaturization of the solenoid, which in turn posed the problem of compromising miniaturization of the ball hitting device.

(Problems to be Solved by the Invention) This invention eliminates the above-mentioned problems of the conventional art, and the present invention provides a method that, when the ball is hit one after another, the hitting force is always constant even at the initial stage or as time elapses. It is an object of the present invention to provide a ball hitting device for an electric pachinko machine that can perform a hitting operation and can also be miniaturized.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention provides a pachinko machine with a ball swinging rod for launching a ball at a launch position, and a swing width of the ball swinging rod. A rotor for rotating the batting rod, and two salient magnetic poles placed on both sides of the rotor with the rotor in the center. and a coil for applying magnetic force to the magnetic poles, and the shape of the outer circumferential surface of the rotor is such that the side facing each of the magnetic poles is normally a flat surface, and the portion between the two flat surfaces is a rotor. On the other hand, the two salient magnetic poles have a surface facing the rotor formed in an arc shape centered on the rotation center of the rotor, and have angles on both sides. When the coil is energized, the magnetic force generated in the magnetic pole,
It also includes a solenoid configured to rotate the rotor in one direction, and the rotor of the solenoid is connected to the batting rod so as to be able to drive it, and the coil of the solenoid has a rectifying current. A series circuit consisting of a circuit and a switch circuit for conducting and cutting off direct current from the rectifier circuit to the coil of the solenoid in response to a switch signal sent to the control terminal of the rectifier circuit is connected, and the pachinko machine is provided with an input end for receiving the operation signal, and between the input end and the control terminal of the switch circuit, there is a pulse oscillation device which receives the operation signal and repeatedly outputs pulses at a predetermined batting interval. A current detection circuit is connected to the coil to detect the current value flowing through the coil and output a current value signal, and a current detection circuit is connected to the coil, and a current detection circuit is connected to the coil, and a current detection circuit is connected to the coil to detect the current value flowing through the coil and output a current value signal. In order to receive the pulse from the pulse oscillation circuit, a signal having a waveform that rises with a time constant larger than the time constant of the current rise of the coil when the coil generates heat and that becomes a predetermined reference voltage after rising is applied. ,
A signal that receives an intermittent reference waveform signal generation circuit that repeatedly generates a signal, a signal from the intermittent reference waveform signal generation circuit, and a current value signal from the current detection circuit, compares the two, and corresponds to the difference between them. an error amplification circuit configured to output , a signal from the error amplification circuit, and a sawtooth wave signal from a separately provided sawtooth wave oscillation circuit;
The latter is pulse-width modulated by the former and a comparison circuit is connected in order to supply the modulated signal to the control terminal of the switch circuit as a switch signal. On the other hand, in the case of each of the magnetic poles, the corners on both sides of the arcuate surface facing the rotor are connected to the flat surfaces on both sides of the rotor. The length of the rotor is smaller than the length of the rotor, and the corner on the side facing the flat surface of the rotor is formed to have a smaller amount of protrusion than the corner on the other side at the beginning of rotation of the rotor.

(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 given to the switch circuit,
The switch circuit conducts intermittently. Due to this conduction, direct current from the rectifier circuit flows to the coil of the solenoid. The current detection circuit detects the current flowing through the coil 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. As a result, the value of the current flowing through the coil becomes a value corresponding to the reference waveform signal. When the above-mentioned current flows through the coil, magnetic force is generated in the magnetic poles, and the rotor is rotated by the magnetic force. In this case, most of the magnetic flux from the magnetic poles is applied to the rotor from the sharp corners of the magnetic poles. Therefore, the magnetic flux is effectively used to rotate the rotor, and the rotor generates a large rotational torque.

(Example) Below, drawings showing examples of the present application will be described. 1 is a pachinko machine, 2 is its board surface, 3 is a ball guide, and 4 is a 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, 10 indicates a stator. In this stator 10, a stator yoke 11 is formed by laminating electromagnetic steel plates punched into a U-shape to a predetermined stacking thickness and fixed with rivets or the like. Reference numerals 12 and 12 indicate magnetic poles in the yoke 11, and the surface facing the rotor described later is formed in an arc shape centered on the rotation center of the rotation shaft described later, and the magnetic poles have corner portions on both sides of the arc surface. 13 and 14, it has a salient pole shape when viewed from the rotor side. Further, the corner portion 13 is formed sharply, while the corner portion 1
4 is formed in a shape with a rounded tip, so that the amount of protrusion of the corner 14 is smaller than that of the corner 13.

15 is a bridge portion 11e of the stator yoke 11
The stator coil is wound around the coil frames 15a, 15a, which are divided into two parts with a U-shaped cross section, and are connected to the bridge part 11.
The coil frame 15a is fitted into the coil frame 15a from both sides of the laminated end face and connected with adhesive tape or the like, and a coil conductor is wound a predetermined number of times around the coil frame 15a. Then 16,1
A bracket 6 is screwed to the stator yoke 11. 17 is a rotating shaft, bearings 17a,
It is rotatably attached to the brackets 16, 16 by 17a. Reference numeral 18 denotes a rotor attached to the rotating shaft 17, and as shown in FIGS.
8a is formed into an oval shape with a flat surface. Each of the side surfaces 18a, 18a is formed to have an angle of more than 90 degrees with respect to the center of rotation of the rotation shaft 17. 19, 19 A pair of salient poles in the rotor 18, each end surface of which is formed in an arc shape centered on the above rotation center. A mounting board 20 is fixed to one of the brackets, and is screwed to the board 6 via a collar 21. Next, reference numeral 22 indicates a batting rod connected to the rotating shaft 17 of the solenoid 7, and reference numeral 24 indicates a stopper attached to the base plate 6. Next 25
indicates a distance adjuster. In this case, 26 is a shaft rotatably attached to the base plate 6, and an adjustment handle 27 provided on the front surface of the pachinko machine 1 is attached to one end of the shaft. Reference numeral 28 denotes a starting position adjusting cam attached to the shaft 26 for receiving the ball rod 22. By operating the handle 27, the cam 28 changes its position as shown in FIG. 2 to receive the ball rod 22. It is possible to change the position. Reference numeral 29 denotes a tension spring for pulling back the starting position adjusting cam 28 to the position shown by the solid line in FIG.

In the pachinko machine 1 having the above configuration, the coil 1 in the ball hitting solenoid 7 is controlled by a control circuit which will be described later.
5 is intermittently energized. When the coil 15 is energized as described above, the magnetic flux generated by the coil 15 is applied to the rotor 18 via the stator yoke 11, and the rotor 18 is rotated in the direction of arrow C shown in FIGS. 2 and 4. As a result, the ball hitting rod 22 swings from, for example, the position shown in FIG. 2 to the ball hitting position shown in FIG. After hitting the ball as described above, the ball batting rod 22 moves to the starting position adjusting cam 28 by its own weight or by the biasing force of a spring connected to the ball batting rod 22 or the rotating shaft 17 as necessary.
It returns to a position where it can be caught by. Such an operation is performed each time the coil 15 is intermittently energized, and the balls are successively launched toward the board surface 2.

In the above case, by moving the starting position adjustment cam 28 using the handle 27 toward the position shown by the imaginary line in FIG. be able to. This makes it possible to variously change the driving force applied to the ball batting rod 22 when the coil 15 is energized and the ball batting rod 22 performs a ball hitting operation, and the hitting force of the ball at the ball hitting position as described above can be adjusted as desired. Can be adjusted.

To further explain this point, when the starting position adjusting cam 28 is turned to the leftmost position in FIG.
rotation angle (as shown in Fig. 4, the stator yoke 1
Straight line X- connecting the pole centers of magnetic poles 12 and 12 of 1
The angles formed by the pole centers 1 of the salient poles 19, 19 of the rotor 18 with respect to the straight line Y-Y' perpendicular to X' are the fourth and fifth angles.
It is received at the point θ1 (for example, 10 to 20 degrees) shown in the figure. Therefore, when the rotor 18 is driven from that position, as is clear from FIG.
has a large driving force. Further, the range of swing of the ball batting rod 22 from that position to the ball hitting position is large. Therefore, the ball hitting rod 22 reaches the ball hitting position at a rapid rate. As a result, the ball is launched with great force. At this time, the maximum torque of the solenoid is selected so as to obtain the striking force that allows the ball to fly to the position indicated by the symbol P on the board 2 in FIG. On the other hand, when the starting position adjusting cam 28 is turned all the way to the right in FIG. 2, the starting position adjusting cam 28 receives the ball hitting rod 22 at a position where the rotation angle of the rotor is θ2 (for example, 45°). Therefore, when the rotor 18 is driven from that position, the driving force exerted on the rotor 18 is small. Further, the swing width of the ball batting rod 22 from that position to the ball hitting position is small. Therefore, the ball hitting rod 22 reaches the ball hitting position at a slow speed. As a result, the ball is launched with little force. At this time, the above-mentioned angle θ2 is selected so as to obtain a striking force that allows the ball to fly to the position indicated by the symbol Q on the board 2 in FIG.

Next, regarding the solenoid with the above configuration, the rotor 1
Since the flat surface 18a at 8 and the corner portions 13 and 14 at the magnetic pole 12 are formed as described above, the following features are provided. That is, when current is passed through the coil 15 in the state shown in FIG. 4, the main magnetic flux Φ of the magnetic flux generated thereby flows through the portion where the permeance between the corner portion 13 and the salient pole 19 is maximum; A large torque in the direction of arrow C is applied to the rotor 18. On the other hand, the permeance between the corner portion 14 and the salient pole 19 is reduced, making it difficult for the main magnetic flux to flow, and the torque exerted on the rotor 18 in the opposite direction to that described above is extremely small. In this way, most of the magnetic flux is effectively used to drive the rotor 18 in the direction of arrow C. Therefore, when the same value of current (for example, 1.3 A) as that of a conventional solenoid is applied to the coil 15, the conventional solenoid can only obtain the torque shown by B in Fig. 5.
In the solenoid of this example, it is possible to obtain a large torque (1.7 to 2 times that of the conventional example) as shown by A in the figure. On the other hand, according to the configuration of this example, in order to obtain sufficient torque (see Fig. 5 A') for a pachinko machine's launching device, the solenoid must be made smaller and the current to the coil must be extremely small (for example,
0.8A).

Next, FIG. 6 showing a control circuit for the ball hitting solenoid 7 will be explained. In the control circuit 31, 32 is an input terminal of an AC power source, for example, an AC power source.
Connected to 24V supply line. 33 is a connection end to which the solenoid 7 (coil 15) is connected. 34 is a rectifier circuit, for example, a full-wave rectifier circuit using a diode bridge. 35 is a switch circuit, for example, a switching transistor Q1 is used. Reference numeral 36 denotes a current detection circuit, which includes, for example, a current detection resistor RS. 37
indicates a freewheeling diode. Next, reference numeral 41 denotes an input terminal for operating signals, which is connected to, for example, the adjustment handle 17 shown in FIG. 1 above. 42 is a well-known touch sensor circuit, and 43 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 44 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. 45 is a well-known error amplification circuit;
7 is a well-known sawtooth wave oscillation circuit, for example 10kHz.
It is designed to oscillate a sawtooth wave. 48
Reference numeral 50 indicates a well-known comparison circuit, and 50 indicates a constant voltage power supply circuit, which is a circuit for supplying operating and reference power to each of the circuits. The above control circuit 31 is the second
The pachinko machine 1 is housed in the case 52 shown in the figure.
It is attached to the base frame 1a of.

Next, the operation of the control circuit 31 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 34, and this voltage is stabilized by the constant voltage power supply circuit 50 and supplied to each circuit.

If the adjustment handle 17 is not touched and therefore no operation signal is input to the input terminal 41, the touch sensor circuit 42 will not produce an output, and therefore the pulse oscillation circuit 43 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 amplification circuit 45, and its output side is at ground level, and the output side of comparator circuit 48 is also at ground level. As a result, transistor Q2 is off and coil 15 is not energized.

Next, when an operation signal is input to the input end 41 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 42 produces an output in response to a manipulation signal. Then, from the pulse oscillation circuit 43,
Negative logic pulses are output within 100 times. The intermittent reference waveform signal generation circuit 44 outputs a reference waveform signal every time it receives the negative logic pulse. That signal and
The solenoid current value signal obtained as the voltage generated across the current detection resistor RS of the current detection circuit 36 is input to the error amplification circuit 45, and the error amplification circuit 45 outputs a signal determined by the difference between them. Ru. This output is compared with the output of the sawtooth wave oscillation circuit 47 in a comparator circuit 48, and the error amplification circuit 4
5 is larger than the output of the sawtooth wave oscillation circuit 37, the output terminal of the comparison circuit 48 outputs a sawtooth wave whose pulse width is modulated by the output voltage level of the error amplification circuit 45. To explain this based on FIG. 8 of the drawing, if the voltage level from the error amplification circuit 45 is high at point a,
An output as shown in FIG. 8B is produced, and when the voltage level from the error amplification circuit 45 is low in a, an output as shown in FIG. 8C is produced. Comparison circuit 4
The output from the solenoid 8 is applied as a switch signal to the control terminal of the switch circuit 35, that is, the base of the transistor Q1, and as it is repeatedly turned on and off, a voltage is applied to the solenoid coil 15. The on/off state of the transistor Q1 is as shown in FIG. As shown by arrow I in FIG.
(See figure b). The current flowing through the solenoid coil 15 in this way is detected in the form of a voltage generated across the current detection resistor RS, and the detected value (current value signal) is sent to the inverting input side of the error amplification circuit 45 as described above. It is input as follows. As a result of such closed loop control, the current flowing through the solenoid coil 15 has a value that accurately corresponds to the reference waveform signal.

As a result of the above-mentioned control being performed every time a negative logic pulse is generated from the pulse oscillation circuit 43, the above-mentioned current repeatedly flows through the coil 15.
The ball hitting operation by the solenoid 7 is repeated.

Next, the operation of the intermittent reference waveform signal generation circuit 44 will be explained. In this circuit 44, when a negative logic pulse is input from the pulse oscillation circuit 43, it turns off the transistor Q2. Then, the capacitor C is charged by the direct current supplied from the constant voltage power supply circuit 50 through the resistor R1, and the voltage at the point R 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 50 and the resistance R1,
The voltage rises to the reference voltage set by the voltage division ratio of R2. By setting this time limit to be sufficiently longer than the time limit at which the constant current function of the constant current power supply circuit 51 becomes effective, the time limit occurs from the moment when the pulse oscillation circuit 43 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 coil 15 of the solenoid, and the rotary solenoid 7 can always generate a stable and constant torque. To reiterate, when the transistor Q1 is made conductive continuously, the current i flowing through the solenoid coil 15 is such that the output voltage of the rectifier circuit 34 is V, the inductance of the solenoid coil 15 is L, and the DC resistance of the solenoid coil 15 is R. When time is t, i=V/R(1-e ^-R/Lt ). However, at the point R, there is a time constant (the first
0 (see Figure 0 c), and after rising, a signal with a waveform that becomes a predetermined reference voltage determined by the output voltage of the constant voltage power supply circuit 50 and the voltage division ratio of resistors R1 and R2, that is, a reference waveform signal, is obtained. is outputted from the intermittent reference waveform signal generation circuit 44 to the error amplification circuit 45. Then, with a pulse width based on that signal, transistor Q1
is turned on and off so that the average current value to the solenoid coil 15 is controlled. Therefore, even if the solenoid coil 15 generates heat and its DC resistance, inductance, etc. change, a current with the same waveform can be passed through the solenoid coil 15 every time, and the same batting torque can be generated every time.

(Effects of the Invention) As described above, in the present invention, since a part of the pachinko machine is provided with the batting rod 22 whose swing width can be adjusted by the starting position adjusting cam 28,
By driving this with the rotor 18 of the solenoid 7, it is of course possible to selectively hit the ball at a far position or a close position on the board 2, and the control circuit 31 of the solenoid 7 utilizes the solenoid 7 for a long time. Even in such a case, the circuit is designed so that the driving force of the rotor 18 does not change, so that the player can concentrate only on finely adjusting the cam 28. As pointed out in the section on conventional technology, in conventional cases, players not only have to make fine adjustments to the cam to adjust the flight distance of the ball, but also have to make adjustments in response to changes in the driving force of the rotor. This has the effect of making it easier for players to play, whereas they were forced to make adjustments taking into account the factors involved.

Also, as a matter of course, the rotor 1 according to the present invention
The corresponding shape of the solenoid 8 and the magnetic pole 12 is such that a sufficiently large hitting torque can be obtained even when the solenoid is downsized, so it has the effect of contributing to downsizing of the entire solenoid.

[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 sectional view taken along the - line, Fig. 4 is an explanatory diagram of the operation of the ball hitting solenoid, Fig. 5 is a graph showing an example of a torque curve, Fig. 6 is a block circuit diagram of the control circuit, and Figs. 7 to 10 The figure is a waveform diagram for explaining the operation, and FIG. 11 is a partial diagram of a conventional ball hitting solenoid. 12... Magnetic pole, 15... Coil, 18... Rotor, 43... Pulse oscillation circuit, 44... Intermittent reference waveform signal generation circuit, 45... Error amplification circuit, 47
...Sawtooth wave oscillation circuit, 48...Comparison circuit, 3
5...Switch circuit, 36... Current detection circuit.

Claims (1)

[Claims] 1. A part of the pachinko machine is equipped with a swinging ball rod for launching the ball at the launch position, and is also equipped with a starting position adjustment cam for adjusting the swing width of the ball rod. , on the other hand, a rotor for rotating the batting rod, and two salient magnetic poles arranged on both sides of the rotor with the rotor in the center;
and a coil for applying magnetic force to the magnetic poles, and the shape of the outer circumferential surface of the rotor is such that the side facing each of the magnetic poles is normally a flat surface, and the portion between the two flat surfaces is a rotor. On the other hand, the two salient magnetic poles have a surface facing the rotor formed in an arc shape centered on the rotation center of the rotor, and have angles on both sides. The solenoid is shaped so that the rotor is rotated in one direction by the magnetic force generated in the magnetic pole when the coil is energized. The rotor is connected to the batting rod so that it can be driven, and the solenoid coil has a rectifier circuit, and direct current from the rectifier circuit is connected to the solenoid in response to a switch signal to its control terminal. A series circuit consisting of a switch circuit for conducting and cutting off the solenoid is connected to the coil of the solenoid, and the pachinko machine is provided with an input terminal for receiving operation signals, and the input terminal and the control terminal of the switch circuit are connected to each other. A pulse oscillation circuit that receives an operation signal and repeatedly outputs pulses at a predetermined batting interval is connected between the coil and the coil, and a pulse oscillation circuit that detects the current value flowing through the coil and outputs a current value signal. A current detection circuit for output is connected, and on the other hand, a time constant is connected between the pulse oscillation circuit and the control terminal of the switch circuit, even if it is larger than the time constant of the current rise of the coil when the coil generates heat. an intermittent reference waveform signal generation circuit that receives pulses from the pulse oscillation circuit and repeatedly generates a signal with a waveform that becomes a predetermined reference voltage after rising; and an error amplification circuit that receives the signal from the current detection circuit and the current value signal from the current detection circuit, compares the two, and outputs a signal corresponding to the difference between the two, and the signal from the error amplification circuit, which is provided separately. A comparison circuit which accepts a sawtooth wave signal from a sawtooth wave oscillation circuit, pulse width modulates the latter with the former, and supplies the modulated signal to the control terminal of the switch circuit as a switch signal is connected in order, and The flat surfaces on both sides of the rotor are formed to have an angle of more than 90° with respect to the center of rotation, while the flat surfaces on both sides of the rotor face each other at an angle of more than 90° with respect to the rotation center. The distance between the corners on the rotor is made smaller than the length of the flat surfaces on both sides of the rotor, and at the beginning of rotation of the rotor, the corner on the side facing the flat surface of the rotor is made smaller than the corner on the other side. A ball hitting device for an electric pachinko machine characterized by being formed with a small amount of protrusion.