JPH0366908B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pinball game machine represented by a pachinko game machine, a coin game machine, etc. The present invention relates to a pinball game machine provided with a batted ball firing means that is created so as to be in a firing state that does not exceed a set limited number of shots.

[Prior Art] In this type of pinball game machine, an example of what has been generally known in the past is that an electric ball striking mechanism is provided as an example of the ball firing means, and the electric ball striking mechanism is powered by electric power. The ball is fired in bursts so that the number of balls per unit time does not exceed a preset limit. In this way, conventional pinball game machines are manufactured so that the number of balls fired per unit time does not exceed a preset limit number of shots, and when the number of shots per unit time is too large, gambling The structure was designed to prevent the inconvenience of high performance.

[Problem to be solved by the invention] Even with the pinball game machine manufactured in this way,
Once shipped to a gaming parlor (hall), there is a risk that the ball may be tampered with in the gaming parlor so that the number of balls fired per unit time exceeds the preset limit number of shots. In other words, in a gaming hall,
In addition to increasing the gambling aspect and attracting players,
There is a high possibility that the above-mentioned unauthorized modification will be carried out in order to increase the number of balls fired to increase customer turnover and improve sales.

This invention was devised in view of the above circumstances, and its purpose is to provide a countermeasure that can prevent, as much as possible, inconveniences such as an increase in gambling due to unauthorized modification of a game hall after it has been shipped to a game hall. Our goal is to provide ball game machines.

[Means for Solving the Problems] The present invention provides a bullet provided with a ball firing means that is manufactured so that the number of balls fired per unit time does not exceed a preset limit number of shots. In the ball game machine, an abnormal state detection means for detecting an abnormal state that causes the ball firing means to malfunction such that the number of balls fired by the ball firing means exceeds the limited number of shots; and the abnormal state. The present invention is characterized in that it includes a disabling means for disabling a certain operation of the game by the pinball game machine based on the detection output of the detecting means.

[Operation] According to the present invention, by the function of the abnormal state detection means, it is detected that an abnormal state has occurred that causes the batted ball firing means to malfunction so that the number of balls fired by the batted ball firing means exceeds the limited number of shots. , Based on the detection, a certain operation of the game by the pinball game machine is disabled. As a result, the player cannot play the game normally with the pinball game machine.

[Embodiments of the Invention] Specific embodiments of the invention will be described below with reference to the drawings.

Summary of Embodiments In this invention, the following embodiments can be considered depending on the type of electric drive means included in the electric ball hitting mechanism, as a state in which the electrical characteristics of the supplied power exceed the limited ball hitting speed. . In other words, in the case of an AC motor, this is a state in which the frequency of the supplied power has exceeded a predetermined frequency. In the case of a DC motor, this is the case when the DC voltage of the supplied power exceeds a predetermined voltage. In the case of a solenoid, this is the case when the intermittent energization cycle of electric power for intermittently energizing becomes shorter than a predetermined cycle.

Specific examples of disabling a certain operation of a game using a pinball game machine include stopping the power supply to the electric motor for hitting the ball, disabling the game control circuit, or disabling the circuit for issuing the batting command. If a touch switch is used in part, the circuit for detecting the operating state of the touch switch may be disabled.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a block diagram of one embodiment of the present invention. In the figure, a pachinko machine 10, which is an example of a pinball game machine according to this embodiment, has power supply terminals p11, p
Contains 12. The output of the frequency converter 3 is supplied to these terminals p11 and p12. Frequency converter 3
1 converts the AC power that is transformed (stepped down) by the transformer 2 and supplied from the AC power source (commercial power source) 1 into a predetermined frequency. The frequency converted by the frequency converter 3 is based on a predetermined batted ball based on the rotational speed of a batting AC motor (hereinafter referred to as motor) 23 included in an electric batting mechanism 20 which is an example of a batted ball launching means to be described later. The frequency is chosen so that it is below the speed. Note that the frequency converter 3 is
If the motor 28 can be rotated using only the AC power supply 1 to achieve a ball hitting speed close to the permissible standard, it is not necessary.

A frequency monitoring device 30, which is a feature of this embodiment, is connected to the terminals p11 and p12. This frequency monitoring device 30 determines that the frequency of the electrical characteristics of the power supplied to the terminals p11 and p12 has exceeded a predetermined frequency, and controls the pachinko machine 1.
This disables a certain operating state of 0. Details of this frequency monitoring device 30 will be explained in detail with reference to FIGS. 3A to 6, which will be described later.

The output of the frequency monitoring device 30 is output from terminals p21, p
22. These terminals p21 and p22 are
This serves as an input terminal for the electric ball hitting mechanism 20. The electric ball hitting mechanism 20 is connected between terminals p21 and p22, and includes a series circuit of a ball hitting switch 21, a single ball hitting command switch 22, a motor 23, and a relay contact 24. The electric ball hitting mechanism 20 also includes a touch switch section (contactor) 25 and a touch detection circuit 6.
Contains 0.

FIGS. 2A and 2B show an electric ball hitting mechanism 20.
FIG. 2A shows the relationship between the ball hitting handle 26 and the ball hitting rod, and FIG. 2B shows the relationship between the motor 23 and the ball hitting rod.

In the figure, the electric ball hitting mechanism 20 includes an operating handle 26. As shown in FIG. The operating handle 26 has a grip portion 2
An operating lever 262 is rotatably supported on the outer periphery of 61. A touch switch part (electrode part) 25 is formed in a part of the grip part 261. A sector gear 280 is fixed to the tip of the support shaft 263 of the operating handle 26 . This sector gear 280
rotates in conjunction with the operation of the operating lever 262,
It is used to adjust the hitting strength of the ball hitting rod 27.

That is, the ball hitting rod 27 and the sector gear 280 are linked as follows. One end of a ball-striking spring 281 is engaged with a portion of the ball-striking rod 27 . The other end of ball striking spring 281 is engaged with one end of rod 282. The other end of the rod 282 is connected to the auxiliary ball hitting spring 2.
83. One end of a wire 284 is engaged with the rod 282 . The wire 284 is hung on a pulley 285, and the other end is attached to a pulley 285.
86. Pulley 286 is gear 287
is fixed to the side of the Gear 287 meshes with sector gear 280 via gear 288. A ball hitting switch 21 is provided in association with the sector gear 280. This ball hitting switch 21 is connected to the sector gear 2
This is a normally open switch that is closed when 80 is slightly rotated, that is, when the operating lever 262 is operated.

The support shaft 263 is attached to the front decorative plate 29.
A single batted ball command switch 22 is attached to a part of the front decorative plate 29.

A support shaft 27a is fixed to the lower part of the ball hitting rod 27. The support shaft 27a is supported by a bearing 27b. This bearing 27b is fixed to the mounting plate. A lever 27c is fixed to the support shaft 27a. An engagement pin 27d is fixed to the tip of the lever 27c. A ball hitting cam 2 is located near the engagement pin 27d.
3a is provided. The ball hitting cam 23a is connected to the motor 2
It is connected to the rotating shaft of No. 3. This ball hitting cam 23a
When rotated by the rotational force of the motor 23,
By pressing or releasing the pressing on the engagement pin 27d with the circular arc portion, the ball hitting rod 27 is intermittently rotated, and the ball hitting operation is performed a number of times corresponding to the number of teeth of the cam per rotation. It is.

3A and 3B show the frequency monitoring device 30
FIG. 3A shows the door in an open state, and FIG. 3B shows the door in a closed and sealed state.

In the figure, the frequency monitoring device 30 is constructed by attaching a door 32 to the front of a box 31 so as to be openable and closable. A mounting panel 311 is attached to the front portion of the box 31. A numeric display 33, a frequency setter 34, and a numeric display 35 are attached to the mounting panel 311. The numeric display 33 is connected to the terminal p
11 and p12. The frequency setter 34 is a rotary switch or the like, and presets a frequency at which to detect when the power supply frequency is illegally increased in order to increase the batting speed above the permission standard. The numeric display 35 is used to display the frequency set by the frequency setter 34.

A protrusion 312 is provided on a part of the front of the box 31.
is formed. A hole 313 is bored in the protrusion 312 . The door 32 corresponding to the protrusion 312 has a
A fitting hole 321 is bored. When the door 32 is closed and locked with the key 322, the protrusion 312
The hole 313 protrudes beyond the surface of the door 32. This hole 313 is sealed by a sealing part 36, for example, by a regulatory agency or a pachinko machine manufacturer, etc. when the door 32 is closed. As a result, after setting the frequency at which fraud should be detected using the frequency setter 34, it is possible to later confirm that the gaming hall staff has released the seal on the seal section 26 and changed the setting state of the frequency setter 34. It will be made easily available to regulatory authorities.

FIG. 4 is a circuit diagram of a frequency monitoring circuit 40 built into the frequency monitoring device 30. The frequency monitoring circuit 40 of this embodiment includes a frequency detection circuit 41 which is an example of a power state detection means, a ball-hitting prohibition circuit (ball-hitting operation disabling activation means) 42 included in the disabling means, and a frequency setter 34. It will be done.

FIG. 5 is a time chart for explaining the operation of FIG. 4. Next, with reference to FIGS. 1, 4, and 5, the specific circuit configuration and operation of FIG. 4 will be described.

Normal operation When power with a frequency lower than the predetermined frequency set by the frequency setter 34 is supplied to the terminals p11 and p12, that is, when the batted ball speed is within the range of permission standards, the following operation is performed. It will be done. That is, the AC voltage supplied to terminals p11 and p12 is processed by a waveform shaping circuit (such as a Schmitt circuit).
The waveform is shaped in step 411, and the pulse is derived as a pulse having the same frequency as the power supply frequency and synchronized in phase. This pulse is generated by the AND gate 412
is given as one input. and gate 4
12 is given the output pulse of the 1 second pulse oscillator 413. This 1 second pulse oscillator 413
constantly generates pulses each having a positive pulse period and a negative pulse period of 1 second. This one
At the positive rising edge of the second pulse, the differentiator circuit 4
15 rises and is differentiated, and the count value of the counter 414 is reset by the differential pulse. And 1
During the positive pulse period of the second pulse, AND gate 4
12 derives a pulse synchronized with the power supply frequency as an addition pulse and supplies it to a counter 414. The counter 414 increments the count value by 1 each time an addition pulse is input. counter 4
14 count value (i.e. frequency f ₀ ) is determined by the determination unit 4
It is given as one input of 16. Judgment section 41
6, the reference frequency f _s set by the frequency setter 34 is input. Here, the reference frequency
f _s is selected to be a value proportional to the rotational speed of the motor 23 such that the ball hitting speed is less than or equal to the permissible standard (for example, 100 balls per minute). However, if necessary, f _s is selected to be slightly higher so as to cover the range of fluctuations (errors) in the power supply frequency.

When the count value of the counter 414 (that is, the frequency f ₀ ) is less than or equal to the reference frequency f _s , the determination unit 416 derives a high level from the output terminal a to force the flip-flop 422 into the reset state, so that the frequency f ₀ becomes the reference frequency f s . When the voltage exceeds _s , a high level is derived from output terminal b and the flip-flop 42
2 is set. However, when the power supply frequency is normal, a high level is not derived from output terminal b, so the flip-flop 42
2 remains reset. At this time, a low level is derived from the output Q of the flip-flop 422, which is inverted to a high level by the inverter 423, and the triac 4
It is given as a gate signal of 21. This triax 421 is connected between terminals p11 and p21, becomes conductive with both positive and negative polarities of the AC power supply during a period when a high-level gate signal is input, and supplies AC power to terminals p21 and p2.
Supply to 2.

By the way, when a player plays pachinko, the operating lever 262 is rotated to achieve a predetermined ball hitting strength, so the ball hitting switch 21
is in a closed state. Further, the single-hit ball command switch 22 remains closed because it is not pressed in any state other than when commanding a single-shot ball. Furthermore, since the player places his hand on the grip section 261 and touches the touch switch section 25 with part of his fingers during the ball hitting game, the touch detection circuit 60, which will be explained in detail with reference to FIG. It operates to close the relay contact 24. Therefore, the motor 23 is connected to the terminals p21 and p2.
Since the ball is rotated by receiving the electric power supplied to the ball 2, the ball hitting operation is performed at a predetermined ball hitting speed or less.

Operation when the frequency of the supplied power is increased illegally to make the batting speed higher than the permissible standard In this case, since the power frequency _f0 supplied to the terminals p11 and p12 exceeds the standard frequency _fs ,
The determining unit 416 determines this and derives a high level from the output terminal b. In response, flip-flop 422 is set to derive a high level from output Q. This high level is inverted by an inverter 423 to become a low level. Therefore, the supply power frequency is equal to the reference frequency f _s
, the gate signal is not applied to the triax 421, and therefore the terminals p21,
Power is no longer supplied to p22. Accordingly, even if the player operates the operating lever 262 or touches the touch switch section 25 with his/her finger, the power supply to the motor 23 is cut off, so that the ball hitting operation is disabled. As a result, if the ball batting speed is illegally changed to exceed the permissible standard, the game becomes impossible, which is useful for preventing such fraud.

By the way, although the gate signal given to the triac 421 is a pulse based on the logic state of the output Q of the flip-flop 422, a high frequency pulse may be given.
In that case, an AND gate may be used in place of the inverter 423, the output Q of the flip-flop 422 may be given as one input of the AND gate, and the pulse from the pulse generator may be given as the other input of the AND gate. In that case, the output frequency of the pulse generator is selected to be several times higher than the power supply frequency. The frequency detection circuit 41 detects that an abnormal state has occurred in which the batted ball firing means is erroneously operated so that the number of balls fired by the batted ball firing means per unit time exceeds a preset limit number of shots. An abnormal state detection means is configured.

FIG. 6 is a detailed diagram of the touch detection circuit 60.

Next, the configuration and operation of the touch detection circuit will be explained.

Touch detection circuit 60 includes an oscillation circuit 61 and a flip-flop 62. flipflop 6
2 includes two NOR gates 62a and 62b. The oscillation circuit 61 generates high-level pulses for a certain period of time at a certain period. This oscillation pulse is given as one input to the NOR gate 62a via the variable resistor 631, and
NOR gate 62 via resistors 632 and 633
It is given as one input of b. A capacitor 641 is connected between the connection point A of the resistors 632 and 633 and the touch switch section 25.

First, consider a state in which the player's finger is not touching the touch switch section 25, that is, a state in which no ball hitting operation is being performed. At this time, the potential at the connection point between the capacitor 641 and the touch switch section 25 becomes higher than when the touch switch section 25 is grounded. Then, the resistance value of the variable resistor 631 is adjusted in advance so that the input voltage Vb of the NOR gate 62b reaches the operating voltage earlier than the input voltage Va of the NOR gate 62a when a positive pulse is applied to the connection point RO. I'll keep it. In other words, Noah Gate 62b
The time constant τb for the operation of the NOR gate 62a is smaller than the time constant τa for the operation of the NOR gate 62a (tb<τa).
chosen to be. Therefore, Noah Gate 6
The waveforms of the input voltages Va and Vb of 2a and 62b are trapezoidal waves, but Vb is steeper at rise and fall than Va. That is, the input voltage Vb reaches the operating voltage (threshold voltage V _TH ) of the NOR gate 62b earlier.

Now, considering a state in which Va<V _TH and Vb>V _TH in one period of the oscillation pulse, the output of the NOR gate 62a becomes a high level and the output of the NOR gate 62b becomes a low level. Thereafter, when Va>V _TH changes (however, Vb>V _TH remains), both NOR gates 62a and 62b become low level. This change time is the difference between the time constants τb and τa (τb
-τa), the NOR gate 62a derives a positive pulse with a minute time width. Thereafter, when Vb<V _TH and Va>V _TH , the output of the NOR gate 62a becomes low level and the output of the NOR gate 62b becomes high level. In addition, Va
and Vb both change below V _TH ,
The output of the NOR gate 62a remains at a low level, and the output of the NOR gate 62b remains at a high level. Therefore, when the player's finger is not touching the touch switch section 25, the NOR gate 62a generates a positive pulse with a minute time width. However, this Noah Gate 6
The output pulse of 2a charges capacitor 642 through resistor 634 and diode 65;
The terminal voltage of capacitor 642 is
Since the voltage changes to low level before reaching the operating voltage of the capacitor 642, the charge stored in the capacitor 642 is discharged through the resistors 635 and 636. Therefore, the transistor 66 does not turn on, and the relay coil 6
7 is not energized, the relay contact 24 remains open. Therefore, unless the touch switch section 25 is grounded through the human body,
No power is supplied to the motor 23.

On the other hand, when the player's finger touches the touch switch section 25, the potential at the connection point between the touch switch section 25 and the capacitor 641 becomes the ground potential. This is equivalent to increasing the charging capacity of the capacitor 641 compared to the case where the touch switch section 25 is not grounded. In this case, the time constant τb increases in proportion to the increase in the charging capacity of the capacitor 641, and the time constant τa becomes smaller than τb. Therefore, input voltage Va has a steeper rise and fall than Vb. That is, Va reaches the threshold voltage _VTH of the NOR gate 62 first.

Now, considering a state in which Va>V _TH and Vb<V _TH in one period of the oscillation pulse, the output of the NOR gate 62a becomes a low level and the output of the NOR gate 62b becomes a high level. Then Va and Vb
When both become equal to or higher than V _TH , Noah gate 6
The outputs of 2a and 62b both become low level.
Thereafter, when Va<V _TH and Vb>V _TH , the output of the NOR gate 62a becomes high level and the output of the NOR gate 62b becomes low level. Thereafter, even if both Va and Vb become below _VTH , the previous state (that is, the state in which the output of 62a is at high level and the output of 62b is at low level) continues. Since this state continues while the oscillation pulse is negative (low level), a positive pulse with a relatively long time width is output from the NOR gate 62a.

At this time, the capacitor 642 is connected to the NOR gate 6
Since it is charged by the long-width pulse of the output of 2a, its terminal voltage reaches the operating voltage of the transistor 66 in a shorter time than one period of the oscillation pulse. In response, transistor 66 becomes conductive, energizing relay coil 67 and opening relay contact 24.
Therefore, electric power is supplied to the motor 23.

Note that as long as the touch switch section 25 is touched by a finger, the capacitor 642 is charged by the output pulse of the NOR gate 62a before the voltage drops below the operating voltage of the transistor 66, so its terminal voltage is always kept below the operating voltage of the transistor 66. Hold.

By the way, although the above-described embodiment shown in FIG. 1 shows the case where the frequency monitoring device 30 is provided inside the Pachinko machine 10, it may be provided outside the Pachinko machine.

FIG. 7 is a diagram showing an example in which frequency monitoring devices are provided on an island-by-island basis. Usually, in a pachinko game parlor, a plurality of pachinko machines 10' (the pachinko machines referred to herein do not include the frequency monitoring device 30) are arranged horizontally to form an island. Therefore, as another application example of the frequency monitoring device 30 of this embodiment, the frequency monitoring device 30 is
0 may be provided so that the output power of the frequency monitoring device 30 is commonly given to the pachinko machines 10' on a common island. This has the advantage of reducing equipment costs.

FIG. 8 is a circuit diagram of another embodiment of the invention. This embodiment differs from the embodiment shown in FIG.
The immobilization means is configured as follows.
That is, in this embodiment, the terminals p11, p12
In addition to or in place of stopping the power supply to the motor 23, if the power supply frequency _f0 supplied to the motor exceeds the reference frequency _fs , the touch detection circuit 60 is disabled; Alternatively, a game control disabling means for disabling the game control circuit 87, which is an example of a game control means for controlling the game of the pachinko machine, is employed. In this manner, the disabling means includes the above-described ball-hitting disabling means for disabling the ball-hitting operation of the ball-launching means and the game control disabling means for disabling the game control means. This disabling means disables certain operations of the game using the pinball game machine, so that the player cannot continue playing the game as usual with the pinball game machine. As mentioned above, if an abnormal condition occurs that causes the batted ball firing means to malfunction so that the number of batted balls fired per unit time exceeds the preset limit number of shots, this disabling means is activated. Since the player is unable to continue playing as usual, there is an advantage in that inconveniences such as an increase in gambling due to unauthorized modification of the number of balls to be fired can be prevented as much as possible. In addition,
It may be determined whether or not the limited number of shots has been exceeded by detecting the balls fired by the ball firing means and counting the number of balls fired per unit time.

Next, the differences between this embodiment and FIG. 1 will be explained in more detail. Terminals p11, p12
A rectifier circuit (or full-wave rectifier circuit) 81 is connected to. A capacitor 82, a relay coil 83 and a transistor 8 are connected to the output end of the rectifier circuit 81.
4, a series circuit of relay contact 85 and touch detection circuit 60, and a series circuit of relay contact 86 and game control circuit 87 are connected in parallel.

Here, the transistor 84 conducts when the output Q of the flip-flop 422 is at a high level.
This is for exciting the relay coil 83. Due to its excitation, the relay coil 83 closes the normally closed contact 8
5 and 86 are opened. Game control circuit 87
The control system performs control for the game, such as paying out prize balls according to winning balls, or opening the winning ball device to a state where it is easy to win a prize based on the game state.

In operation, when the power supply frequency f ₀ supplied to the terminals p11 and p12 is lower than the reference frequency f _s , the output Q of the flip-flop 422 becomes low level in the same way as in the above-mentioned operation, so that the triac 4
21 becomes conductive, allowing power to be supplied to the motor 23. At this time, since transistor 84 is in an off state, relay coil 83 is deenergized. Therefore, since the normally closed contacts 85 and 86 remain closed, the output of the rectifier circuit 81 is supplied to the touch detection circuit 60 and the game control circuit 87. In other words, the touch detection circuit 60 and the game control circuit 87 are activated.

On the other hand, when the power supply frequency f ₀ supplied to the terminals p11 and p12 exceeds the reference frequency f _s , the flip-flop 422 is set and the output Q becomes high level. Therefore, the triax 421 is turned off, disabling the power supply to the motor 23. At the same time, the high level of output Q makes transistor 84 conductive. In response, relay coil 83 is energized to open normally closed contacts 85 and 86. Therefore, power is no longer supplied to the touch detection circuit 60 and the game control circuit 87, and the touch detection circuit 60 and the game control circuit 87 are disabled.

If configured as in this embodiment, if the batting speed is illegally increased beyond the permitted standard, not only will the batting motor be stopped, but the circuit for detecting the operating state of the touch switch and/or controlling the game will be shut down. It has the advantage of being immobilized.

9A and 9B are illustrative views of a pachinko machine to which the embodiment of FIG. 8 is applied. In the figure,
The pachinko machine 10 is provided with a control board 91.
A frequency monitoring circuit 40, a touch detection circuit 60, and a game control circuit 87 are integrally mounted on the control board 91. In addition, the frequency monitoring circuit 4
If 0 is set for each pachinko machine,
It is provided at a location away from the control board 91. Terminals p11 and p12 are connected to the AC power supply 1 or the output of the frequency converter 3 via the connector 92.

In this way, it is only necessary to attach the control board 91 to the pachinko machine 10, which has the advantage of simplifying the installation work.

By the way, in each of the above-mentioned embodiments, a case has been described in which the electric drive means included in the electric ball hitting mechanism is an AC motor, but if other electric drive means are used, the following may be done. For example, when using a DC motor, the ball hitting speed changes depending on the supply voltage, so the voltage supplied to terminals p11 and p12 is detected, and when the voltage exceeds a predetermined voltage, ball hitting operations etc. are disabled. It is only necessary to configure it so that it is dynamic. Furthermore, when a solenoid is used, it can be achieved with the same configuration as the above embodiment by detecting the frequency of the power supply for intermittent driving supplied to the solenoid.

[Effects of the Invention] As described above, according to the present invention, if an abnormal condition occurs in which the batted ball firing means malfunctions so that the number of balls fired by the batted ball firing means exceeds the limited number of batted balls fired, the pinball game is stopped. A certain operation of the game by the machine is disabled, and the player cannot continue playing the game normally with the pinball game machine. As a result, it is possible to prevent as much as possible the inconveniences such as increased gambling due to unauthorized modification of the number of balls hit by the pinball game machine after it is shipped to the game parlor, and to maintain the healthy entertainment value of the pinball game machine. can be kept.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. FIGS. 2A and 2B are illustrative views of the mechanical parts of the electric ball hitting mechanism. Figures 3A and 3B
The figure is an external view of a frequency monitoring device that is a feature of the present invention. FIG. 4 is a circuit diagram of a frequency monitoring device which is a feature of the present invention. FIG. 5 is a time chart for explaining the operation of FIG. 4. FIG. 6 is a detailed diagram of the touch detection circuit. FIG. 7 is an illustrative diagram of another example to which the frequency monitoring device is applied. FIG. 8 is a circuit diagram of another embodiment of the invention. 9A and 9B are diagrams schematically showing an example of application of the embodiment of FIG. 8. FIG. In the figure, 1 is an AC power supply, 20 is an electric ball hitting mechanism, 30 is a frequency monitoring device, 40 is a frequency monitoring circuit, 41 is a frequency detection circuit (power state detection means), and 42 is a ball disabling circuit (disabling means),
34 is a frequency setter, 60 is a touch detection circuit, 8
7 indicates a game control circuit.

Claims (1)

[Scope of Claims] 1. A pinball game machine provided with a ball firing means that is manufactured so that the number of balls fired per unit time does not exceed a preset limit number of shots, comprising: Abnormal state detection means for detecting an abnormal state that causes the batted ball firing means to malfunction so that the number of balls fired by the batted ball firing means exceeds the limited number of shots; and a detection output of the abnormal state detection means. A pinball game machine characterized in that it includes a disabling means for disabling a certain operation of a game by the pinball game machine. 2. The device according to claim 1, wherein the disabling means includes a ball-hitting disabling means for disabling the ball-hitting operation of the ball-launching means based on the detection output of the abnormal state detecting means. Pinball game machine. 3. The pinball gaming machine includes a game control means for controlling the game, and the disabling means disables the game control disabling means for disabling the game control means based on the detection output of the abnormal state detecting means. A pinball game machine according to claim 1, comprising a means for converting.