JPH10118266A - Pachinko game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Pachinko game machine with which the actually played game is controlled in accordance with the anticipated rate of prize winning by furnishing a counting means which makes an addition when the random value generated at striking of a ball is identical to the prescribed value and a subtraction at sensing of a starting winning ball, and selecting the stopping probability on the basis of the count obtained. SOLUTION: When sensor switches 7a and 7b sense that a ball hits any of gates 6a and 6b for actuating ordinary figure as a specific region provided in the game region of a game board 1, an ordinary figure display device 2 is opetated in variable displaying. Generation of the stop condition in a specific mode after the start of the variable display is controlled on the basis of the predetermined probability, and in case the variable display has stopped in the specific mode, the starting winning hold 4 is changed from the first to the second condition. At this time, an addition is made in case the random value generated at sensing of the struck ball is identical to the prescribed value, and a subtraction is made each time a starting winning ball is sensed, and the probability of the display device 2 stopping in the specific mode is set differingly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball-and-ball game machine such as a pachinko game machine and a coin game machine in which a predetermined number of pachinko balls are fired by inserting coins to compete for points. More specifically, the present invention relates to a ball game machine that can provide a predetermined game value when variable display means provided in a game area is stopped in a specific mode.

[0002]

2. Description of the Related Art In a game store that operates by introducing a ball-and-ball game machine such as a pachinko game machine, it is always necessary to consider management.
It is necessary to consider the number of balls (the number of shot balls) that the player has hit with the ball-and-ball game machine and the number of balls (number of balls) paid to the player as prize balls. For example, in the case of a pachinko gaming machine, if the number of shot balls consumed by a player for one pachinko machine is smaller than the number of balls to be played out, the player wins and the game store side becomes negative. When the difference between the number of balls and the number of shot balls is defined as the number of difference balls and the transition is graphed for a general pachinko machine, as shown in FIG. The number gradually increases, becomes negative for the player, and thereafter, when a “big hit” occurs, the number of balls jumps rapidly and turns to a plus. Thereafter, such a transition is repeated.

[0003] Therefore, for the gaming shop, the ratio of the number of awarded balls to the number of balls consumed by the player (the number of balls released to the number of shot balls) for each pachinko gaming machine, that is, the so-called payout ratio (divided number), is a game. The actual pachinko machines must be adjusted so that the ratio is optimal for the operation of the store, but in the past, this adjustment was all left to a craftsman with a special skill called a nailer.

However, recently, when a prize ball is won in a starting winning opening provided in the game area, the variable display section is operated as a separate game, and when the variable display is stopped in a specific mode, the variable prize is won. A model that opens a ball device so that a player can obtain a large amount of prize balls has become mainstream. In such a model, since the control device such as a microcomputer controls the probability that the variable display unit stops in a specific mode based on a predetermined probability, the probability of the jackpot is in a relatively expected range. Regarding the prize winning rate to the starting prize hole, which falls within the range but triggers a jackpot, the nailer continued to adjust the path leading to the starting prize hole by the nailer.

[0005] Considering that many of the game balls hit into the game area are directed to the starting winning opening, it is necessary to adjust the winning rate of the starting winning opening to the expected numerical value on the entire pachinko machine. Will determine the winning rate.

Therefore, at present, the start winning opening is a variable type (that is, openable and closable) winning ball device, and a variable display section dedicated to the starting winning opening which has a condition that the starting winning opening is advantageously opened for the player is provided. A device that controls the probability of stopping in a specific mode based on a certain probability has appeared.
In such a pachinko gaming machine, the probability that the variable winning ball device, which is the starting winning port, will be opened can be predicted to some extent, and when the starting winning port is opened, the game balls win with a considerably high probability. Mouth prize rate adjustment is now closer to the expected value than if the adjustment was made only by nail adjustment.

[0007]

However, the variable display section which triggers the opening of the start winning opening is a variable display section which starts variable display based on a game ball winning in a specific area provided in the game area. Therefore, the winning rate in the specific area actually matters, but the adjustment of the winning rate in the specific area still depends on the nail adjustment. Therefore, the winning rate of the starting winning opening greatly depends on the adjustment performed by a human.
The difference between the number of balls in the expected value shown by the solid line in FIG. It was difficult to set up, and the burden was still on adjusting the nails of the pachinko machine.

[0008] Even if the adjustment can be performed successfully, the player's ability to hit the game ball at a predetermined position depends on the ability of the player himself. The number of game balls consumed greatly varies among players. In addition, since the probability that the variable display unit that triggers the opening of the variable winning ball device that is the starting winning opening is stopped in a specific mode is fixed to one,
It was difficult to fine-tune the winning rate.

Therefore, an object of the present invention is to control the actual game according to the expected winning rate without requiring the conventional nail adjustment requiring special skills and without being influenced by the skill of the player. An object of the present invention is to provide a ball game machine. Another object of the present invention is to provide a ball game machine capable of adjusting the winning rate in more detail.

[0010]

According to a first aspect of the present invention, there is provided:
A special winning ball detecting means for detecting that a game ball has won a specific area provided in the game area, a variable displaying means for starting variable display in response to a detection signal of the specific winning ball detecting means, A start winning prize port that is configured to be able to be converted into a first state that is disadvantageous to the player and a second state that is advantageous to the player, and is set to start another game when a game ball wins. Start winning ball detection means for detecting a winning game ball, variable display stop control means for controlling the occurrence of a stop state in a specific mode after the variable display of the variable display means based on a predetermined probability, A ballistic game machine comprising: drive control means for converting the start winning port from a first state to a second state when the variable display of the variable display means is stopped in a specific mode. Display stop control The stage includes a launching ball detection unit that detects a game ball fired toward the game area, and determines whether a value of a random number generated according to a detection signal of the launching ball detection unit is a predetermined value. A determining means for performing an adding operation each time the determining means determines that the random number value is a predetermined random number, and a subtracting operation each time a detection signal of the starting winning ball detecting means is present, and the variable display means A plurality of stop probability setting means to set the probability of stopping in a specific mode differently, and a stop probability selection means to select one from the plurality of stop probability setting means based on the count value of the counting means, And the variable display means is controlled to stop based on the probability set by the stop probability setting means selected by the stop probability selection means.

In this ball game machine, the variable display stop control means includes a first random number generation means for generating a random number in accordance with a detection signal of the shooting ball detection means, and a detection signal of the specific winning ball detection means. And a second random number generating means for generating a random number in accordance with the following. The random number generating means may generate a random number, and then the stop probability selecting means may be configured to operate.

A second aspect of the present invention is a specific prize ball detecting means for detecting that a game ball has won a specific area provided in a game area, and responding to a detection signal from the specific prize ball detection means. Variable display means for starting variable display, and configured to be convertible between a first state that is disadvantageous to the player and a second state that is advantageous to the player, so that a different game is started when a game ball wins. Starting winning prize port, starting prize ball detecting means for detecting a game ball winning the starting winning prize port, and a predetermined probability of occurrence of a stop state in a specific mode after the variable display is started by the variable display means. Variable display stop control means for controlling based on the following, and drive control means for converting and driving the start winning port from the first state to the second state when the variable display of the variable display means is stopped in a specific mode. Ballistic play with The variable display stop control means, a plurality of specific mode occurrence probability setting means to set the probability that the display mode when the variable display of the variable display means is stopped is different from the specific mode, Selecting means for appropriately selecting one of the specific mode occurrence probability setting means in advance, a shooting ball detecting means for detecting a shooting ball fired toward the game area, and a detection signal of the shooting ball detecting means The probability that the random number generated according to the predetermined value becomes a predetermined value is set as the probability set in the specific mode occurrence probability setting means selected by the selection means, and it is determined whether the random number is a predetermined value. The variable display means is controlled to stop according to the result of the determination by the determination means.

According to a third aspect of the present invention, in the ball game machine of the second aspect, as a separate game means for performing another game, a variable display is provided in accordance with a detection signal of the starting winning ball detection means. A second variable display means for starting, wherein the variable display stop control means sets a plurality of different occurrence probabilities that the second variable display means stops in the second specific mode. A second specific mode occurrence probability setting unit, a second selection unit that can appropriately select one of the second specific mode occurrence probability setting units in advance, and a detection signal of the starting winning ball detection unit. The probability that the random number generated accordingly becomes the second predetermined value is determined by the second selection means selected by the second selection means.
A second determining means for determining whether or not the random number is the second predetermined value as the probability set in the specific mode occurrence probability setting means. (2) stop control of the display mode of the variable display means,
It is configured to provide a benefit to a player when stopped in the second specific mode.

According to a fourth aspect of the present invention, there is provided a special winning ball detecting means for detecting that a game ball has won a specific area provided in a game area, and in response to a detection signal from the specific winning ball detecting means. Variable display means for starting variable display, and configured to be convertible between a first state that is disadvantageous to the player and a second state that is advantageous to the player, so that a different game is started when a game ball wins. Starting winning prize port, starting prize ball detecting means for detecting a game ball winning the starting winning prize port, and a predetermined probability of occurrence of a stop state in a specific mode after the variable display is started by the variable display means. Variable display stop control means for controlling based on the following, and drive control means for converting and driving the start winning port from the first state to the second state when the variable display of the variable display means is stopped in a specific mode. Ballistic play with The variable display stop control means, a plurality of specific mode occurrence probability setting means to set the probability that the display mode when the variable display of the variable display means is stopped is different from the specific mode, Selecting means for appropriately selecting one of the specific mode occurrence probability setting means in advance, and a probability that a random number generated according to a detection signal of the specific winning ball detection means becomes a predetermined value, The selected specific mode occurrence probability setting means is set as a probability set by the selected means, and the determination means is configured to determine whether the random number is a predetermined value, the variable display means according to the determination result of the determination means Stop control is performed.

According to a fifth aspect of the present invention, there is provided a special prize ball detecting means for detecting that a game ball has won a specific area provided in a game area, and in response to a detection signal from the specific prize ball detecting means. Variable display means for starting variable display, and configured to be convertible between a first state that is disadvantageous to the player and a second state that is advantageous to the player, so that a different game is started when a game ball wins. Starting winning prize port, starting prize ball detecting means for detecting a game ball winning the starting winning prize port, and a predetermined probability of occurrence of a stop state in a specific mode after the variable display is started by the variable display means. Variable display stop control means for controlling based on the following, and drive control means for converting and driving the start winning port from the first state to the second state when the variable display of the variable display means is stopped in a specific mode. Ballistic play with The variable display stop control means, the launch ball detection means for detecting a game ball fired toward the game area, and a random number generated in response to a detection signal of the launch ball detection means is a predetermined A plurality of random value probability setting means for setting different probability values, a random value probability selecting means capable of appropriately selecting one of the plurality of random value probability setting means in advance, and the launch sphere detection The probability that the random number generated according to the detection signal of the means becomes a predetermined value is set as the probability set in the random value probability setting means selected by the random value probability selection means, and whether the random number is a predetermined value. Determining means for determining whether or not the counting means performs an adding operation each time the determining means determines that the value is a predetermined random number value, and performing a subtracting operation every time there is a detection signal of the starting winning ball detecting means,
A plurality of stop probability setting means for setting the probability that the variable display means stops in a specific mode differently, and a stop for selecting one from the plurality of stop probability setting means based on the count value of the counting means The variable display means stops the variable display means based on the probability set by the stop probability setting means selected by the stop probability selection means.

In the ball game machine of the fifth aspect,
The variable display stop control means includes a first random number generation means for generating a random number in response to a detection signal from the launching ball detection means, and a second random number for generating a random number in response to a detection signal from the specific winning ball detection means. Generating means, and after the second random number generating means generates a random number, the stop probability selecting means may be configured to operate.

[0017]

According to the first aspect of the present invention, the probability that the variable display means, which is a condition for opening the variable start winning opening, is stopped in the specific mode is determined by random number lottery based on the detection signal of the shooting ball. Is counted, while the counting means is added. On the other hand, if there is a winning ball in the starting winning opening, the counting means is subtracted. In such a manner that the opening probability of the starting winning opening is controlled to adjust the winning rate.

In this ball-and-ball game machine, the stop probability selection means can also be operated based on the detection signal of the special winning ball detection means which triggers the variable display section to variably display the symbol.

In the ball game machine of the second embodiment, the probability of stopping the variable display means in a specific mode, which is a condition for opening the variable start winning opening, is set in advance to a plurality of occurrence probabilities of the specific mode. One of the different settings is selected, and based on the selected probability, a random number lottery is performed according to the detection signal of the launching sphere. Work to adjust.

In the ball game machine of the third mode, the probability of stopping the variable display section in a specific mode, which is a condition for opening a variable start winning opening, is set in advance to a plurality of occurrence probabilities of the specific mode. It is selected from among those set differently and decided,
Means for adjusting the winning rate by controlling the opening probability of the starting winning opening in such a manner that a random number lottery based on the detection signal of the shooting sphere is performed based on the determined probability, and a second condition which is a condition for giving a profit to the player. The probability of stopping the variable display unit in the specific mode is selected from a plurality of preset settings of the specific mode, and the starting winning port detection is performed based on the determined probability. The means for adjusting the jackpot occurrence probability by performing random number lottery based on the detection signal of the means works in conjunction with the means to adjust the winning rate of the entire gaming machine.

In the ball-ball game machine of the fourth aspect, the probability of stopping the variable display section in a specific mode, which is a condition for opening the variable start winning opening, is set in advance to a plurality of occurrence probabilities of the specific mode. Select one from among the differently set, so that a random number lottery based on the detection signal of the specific winning ball detection means provided in the game area is based on the selected probability of the game ball, It works to adjust the winning rate by controlling the opening probability of the starting winning opening.

In the ball game machine of the fifth aspect, the probability of stopping in the specific mode of the variable display portion, which is a condition for opening the variable start winning opening, is determined by random number lottery based on the detection signal of the shooting ball. When the winning ball is in the starting winning opening, the counter is decremented, and the counter is decremented. When the count value is equal to or greater than a predetermined value, the counter is increased, and when the count value is less than the predetermined value, the counter is decreased. Since the random number lottery based on the detection signal of the launching sphere of the means is performed based on a probability selected from among a plurality of different types of occurrence probabilities of the specific mode, two probability adjustments are performed as a result. The opening probability of the starting winning opening is controlled by means to adjust the winning rate.

In this case, the stop probability selecting means operates based on the detection signal of the specific winning ball detecting means.

[0024]

FIG. 1 is a front view showing a game board of a pachinko game machine as an example of a ball game machine according to the present invention.

The player operates a game ball launching handle (not shown) to cause the game ball launching device 2 shown in FIG. 4 to operate.
0 is played, and a game is played by driving a game ball (pachinko ball) into a game area 10 formed on the game board 1.

In the game area 10, a normal symbol display device 2 as a variable display means capable of variably displaying symbols, numbers or symbols as identification information, and a special symbol display device 3 as a separate gaming device are provided. ing.

In this embodiment, the ordinary symbol display device 2
Is composed of a single-digit 7-segment LED display. The special symbol display device 3 is constituted by a liquid crystal display, and electrically simulates the rotation of three rows of mechanical reels in the slot machine on the screen of the display.

The ordinary symbol display device 2 and the special symbol display device 3 may both use a mechanical reel device used for a slot machine. The ordinary symbol display device 2 uses a liquid crystal display, and vice versa. Alternatively, a 7-segment LED display may be used for the special symbol display device 3, or a display such as a plasma display or a CRT may be used. In addition, a plurality of digits of identification information are displayed on the ordinary symbol display device 2,
Alternatively, one-digit identification information may be displayed on the special symbol display device 3.

Below the special symbol display device 3, it is possible to convert between a first state disadvantageous to the player and a second state advantageous to the player. A mouth 4 and a large winning opening (so-called attacker) 5 which can be similarly converted into two states and pays out 15 winning balls when there is a winning ball are provided. The ordinary symbol display device 2, the starting winning opening 4, and the big winning opening 5 are integrally unitized as a variable winning ball device 9, and are installed at the lower part of the game area.

As shown in FIG. 2, the variable winning ball device 9
The game board 1 is sandwiched between the base 91 and the claw portions 92 provided on the left and right sides of the winning ball device, so that the game board 1 is fixed to the game board 1.

On the front side of the base 91, a general winning opening 13e is provided at the uppermost portion so as to pay out 15 prize balls to the player every time there is a prize ball. The starting winning opening 4 provided at the lower portion is a variable winning opening that makes it easier or more difficult to win a game ball by opening and closing a pair of movable wing pieces. The large winning opening 5 provided at a lower portion thereof is configured so that the movable arm slides left and right to make it easy or difficult to win a game ball.

The normal symbol display device 2 includes a game area 10
Are provided at the lowermost portion, and four normal symbol storage lamps 14 are provided therearound. The ordinary symbol memory lamp 14 is provided with ordinary symbol operating gates 6a, 6b to be described later.
Shows the variable number of displayable times of the ordinary symbol display device 2 started when a game ball wins. That is,
While the normal symbol display device 2 is variably displaying, the number of winnings in the ordinary symbol operating gate 6 is stored up to four times, and the state is notified to the player.

On the back side of the base 91, a starting winning opening solenoid 30 for converting the opening and closing of the starting winning opening 4 is driven and a starting winning prize ball detecting means for detecting a game ball winning the starting winning opening 4 is detected. The mouth switch 31, the special winning opening solenoid 32 that converts and drives the opening and closing of the special winning opening 5, the number of game balls that have won the special winning opening 5, and whether or not the condition that the special winning opening 5 can be opened again And a special winning opening switch 33 for making a judgment.

Referring again to FIG. 1, on the left and right of the lower part of the special symbol display device 3, a normal symbol operation gate 6 as a specific area in which the ordinary symbol display device 2 can be variably displayed.
a, 6b are provided, and usually have a symbol-operating switch 7a, 7b as a specific winning ball detecting means for detecting a game ball passing through each gate.

FIG. 3 shows details of the ordinary symbol actuating gate 6. The gate 6 has a structure in which the game board 1 is sandwiched between the claw portions 62 and the base 61, and a normal symbol operation switch 7 provided inside the gate is mounted so as to protrude from the surface of the game board.

In the present embodiment, the game balls that have passed through the normal symbol operation gates 6a and 6b flow into the out port 8 and exit the game area, but the game balls (specified areas) that have won each of the gates (specific areas). (Specific prize balls) may be taken into the back side of the game board, and a fixed number of prize balls may be given to the player every time the specific prize balls are present.

On the game board surface of FIG. 1, 15 prize balls are provided every time there are lamp windmills 11a and 11b provided with a light emitting portion on the back side of the windmill, simple windmills 12a and 12b, and a prize ball. Winners 13a, 13b, 13 to pay out to the winners
c, 13d, 13e, 13f, and 13g and board side lamps 14a and 14b are provided.

FIG. 4 shows an installation position of a switch for detecting a game ball and a return ball fired by the game ball firing device. In the drawing, the game ball launching device 20 has a structure in which a plunger-type solenoid is excited to launch a game ball, but a rotary solenoid or a motor may be used as a driving source of the launching device.

As a launching ball detecting means for detecting a playing ball fired by the playing ball launching device 20, a launching ball right detection switch 21a and a launching ball left detection switch 21b are provided. The two launching ball detection switches are used to determine whether the game ball has been reliably fired, and a drive signal is output to the gaming ball launching device 20 and the launching ball right detection switch 21a outputs a detection output. After that, it is determined that the game ball has been fired for the first time when the fired ball left detection switch 21b detects the detection output. Therefore, when the launching ball left detection switch 21b first detects the detection output and then the launching ball right detection switch 21a detects the detection output, an error occurs, and it is not recognized that the game ball has been launched.

Also, the game ball is set to the launch ball right detection switch 21.
a, a return ball detection switch 22 is provided to detect a return ball that has a weak resilience and does not reach the game area even after passing the launch ball left detection switch 21b in order.

Next, a gaming method of such a pachinko gaming machine will be described. As is well known, this kind of pachinko machine has a microcomputer as a control means,
This controls the overall game. As shown in the block diagram of FIG. 5, the control means of the present embodiment is also configured mainly by a microcomputer.

The microcomputer 50 includes a CPU 50
A, RAM 50B, ROM 50C and input / output (I / O)
It is composed of a dedicated IC 50D, processes various input signals input from the input circuit 51 according to a program stored in the ROM 50C, and sends output signals from the output circuit 52 to each driving means as necessary. Further, a random number generator 53 for generating a random number value used in the progress of each game is
Connected to U50A.

As described with reference to FIG. 4, the player drives the game ball launching device 20 by operating a game ball launching handle (not shown), and plays the game balls (pachinko balls) one by one. It is driven into a game area 10 formed on the game board 1. The driven game balls fall under the influence of nails, windmills, winning openings, and the like provided in the game area 10.

The game balls that have not entered the winning opening at all flow into the out opening 8 and are taken into the back of the gaming board 1. Of course, there is no payout of prize balls for the player. Gaming balls are general winning openings 13a, 13b, 13c, 13d, 13e, 13
When the player wins f or 13g, 15 prize balls are paid out to the player.

When the game ball passes through the normal symbol operation gate 6, as shown in FIG. 3, a normal symbol operation switch 7 for detecting the passage of the game ball by a change in the magnetism inside the gate causes a detection signal. Is output. Based on the output of the detection signal, the 7-segment LE of the ordinary symbol display device 2 is used.
D starts variable display of numbers, and the variable display stops after a certain period of time (for example, 27 seconds). If the display mode at the time of the stop is a specific number (for example, “7”), the variable start winning opening 4 is opened for a fixed time so as to be advantageous to the player.

In addition, regardless of whether the starting winning opening 4 is open or not, when a game ball wins in the starting winning opening 4, the starting winning opening switch 31 outputs a detection signal and the special symbol display device 3. Is displayed variably to start another game. When the variable display of the special symbol display device 3 is stopped in a specific mode (for example, when three columns of symbols are variably displayed and stopped, and the same symbols are aligned on the same line, etc.), a "big hit" is obtained, and a large prize is won. By exciting the mouth solenoid 32 and sliding the movable arm of the variable-type big winning opening 5, the big winning opening 5 is converted into a state in which the game ball can easily win.

The special winning opening switch 33 in the opened special winning opening 5 counts the number of game balls winning in the special winning opening 5 with an upper limit of ten, and within the opening time of the special winning opening 5. A special time slot is provided, and only when a game ball wins in that time slot, is the bonus given to the special winning opening 5 repeatedly given to the player. Usually, the number of such repeated opening of the winning opening is limited to 16 times.
Thus, the player can get a great profit when it hits the jackpot.

The above is a common game method of this kind of pachinko game machine.

A pachinko gaming machine according to the present invention in which the winning rate is made as close as possible to a value predicted in advance based on such a pachinko gaming machine will be described below.

First, as a first mode, the operation of the correction function of FIG. 7 will be described for the correction function by the control means.

First, a game ball fired by the game ball firing device 20 is determined as a fired ball when both outputs of the fired ball right detection switch 21a and the fired ball left detection switch 21b are detected (ST101). . When both outputs are detected, one random number value is extracted at a predetermined timing from a counter, which is a random number generating means (first random number generating means) (ST102). The random number value may be extracted immediately after both outputs of the two fired ball detection switches are detected or after a certain time has elapsed.

Here, the counter of the first random number generating means is one of the random number sequences generated by the random number generator 53, and the concept of the random number generator 53 is shown in FIG. Random number generator 53
Is roughly composed of a first random number generator 53a, a second random number generator 53b, and a third random number generator 53c. These random number generating means may be configured so that random numbers are generated individually, or three random number sequences may be specified by specifying appropriate ranges different from one random number sequence.

The first random number generating means 53a is used as a hit determination counter, that is, a counter for determining whether "hit" or "missing" (losing).
At this time, it is not directly related to the hit / loss of the ordinary symbol display device. This type of counter generates a random number by adding "1" to the counter and updating the counter value every time a reset pulse is generated. The range of the counter value to be updated can be appropriately changed according to the number of bit data used. For example, if it is 4 bits, it is continuously updated within the range of 0 to 15. The random number generating means is a microcomputer 5
The configuration may be such that random numbers are generated on an operation program of 0, or an integrated circuit having a random number generation function may be used.

Then, it is determined whether or not the random number value extracted at an appropriate timing from the first random number generating means 53a as described above is a predetermined value as a predetermined hit. In this determination, in the case of the first embodiment, since there is only one kind of winning probability in advance, the winning probability is determined by collating with a winning probability table in which a predetermined predetermined value is determined (ST103).

The concept of the winning probability table will be described.
Now, the first random number generating means 53a is composed of 4 bits and updated between “0 to 15”, and the extracted random number value is “5”.
, The winning probability table presets a 4-bit counter renewable range “0 to 15” to a winning range and a loss range. For example, if the hit (predetermined value) is set to “0 to 3” and the remaining is set as a loss, “5” is a loss. In this way, the winning probability table sets the hit range of the extracted random value, and if set as described above, the hit probability is 4/1.
It becomes 6. Thus, it can be set arbitrarily. The winning probability table itself is stored in the ROM 50C.

If the result of the determination is a hit, the winning condition counter as counting means is incremented by "1" (ST1).
04). If it is lost, the winning condition counter is not counted.

Here, the meaning of adding "1" to the winning condition counter will be described. The basic idea of the present embodiment is to give a privilege of opening a winning opening, for example, if the result of the random number lottery based on the timing of launching the game ball which is not affected by the skill of the player is a hit. However, it is not limited to pachinko gaming machines, but it can be said that the game is played only when the ejected game balls contact any member provided in the game area, which is common to all ball game machines. If the basic idea of the present embodiment as described above is applied as it is, it will be strange as a pachinko gaming machine, and may end up distrusting the player.

Therefore, if the result of the random number lottery is
The result is stored in the counter, and the opening of the starting winning opening 4 is controlled on the condition that one of the game balls actually wins the ordinary symbol operating gate 6 provided in the game area 10. If it is, the pachinko machine and the player will not be distrusted. For such a reason, the random number lottery based on the timing at which the game balls are fired results in a configuration in which, if a win is made, the game is temporarily stored (“+1”).

In the present embodiment, the winning condition counter is set to "+1" each time a random number lottery is hit, but may be set to "+2" every time a random number lottery is hit, or conversely, twice. May be set to “+1”.

By the way, it is assumed that a game ball is judged to be a launch ball when both outputs of the launch ball right detection switch 21a and the launch ball left detection switch 21b are detected.
As described with reference to FIG. 4, among the fired game balls, the two switches have passed, but the game balls return without reaching the game area 10 due to a low resilience or the like. There is something. In that case, when the detection switch 22 detects a return ball (ST105), if random number extraction is performed for the next game ball that has been fired, the number becomes double, so random number extraction for the next fire is stopped once. (ST106). When the game ball hit in the game area 10 wins the normal symbol operation gate 6 and passes through the normal symbol operation switch 7 (ST107), the normal symbol display device 2 is activated (ST108), The random number value is extracted at an appropriate timing from the winning determination counter 53b, which is the second random number generating means in FIG. 6 (ST109). Note that the random number extraction may be normally performed before the operation of the symbol is started.

Next, a winning probability table for determining whether or not the extracted random number value is a winning is selected.
At the time of the selection, a winning probability table to be used is determined based on the value of the winning condition counter. The process up to the determination will be described with reference to FIG.

FIG. 8 is a graph showing the transition of switching between two types of winning probability tables in which the probability of stopping at a winning symbol, which is a specific mode of the ordinary symbol display device 2, corresponding to the transition of the winning condition counter value. ing.

The winning condition counter is an 8-bit counter, takes an area of "0 to 255", and sets "128" as an initial value when the power is turned on or when a big hit occurs.

Now, as shown in the graph, the initial value is “128”.
From the above in ST103,
The value of the winning condition counter is incremented by "1" to become "129". When it becomes “129” or more, as shown in FIG. 8, the winning probability table switches from a low probability table to a high probability table. To show specific probability values, the high probability is 250/2
56, the low probability is 25/256, and the high probability is 10 times higher than the low probability. When the winning condition counter becomes equal to or less than “128”, the winning probability table is switched again to the low probability winning probability table.

Accordingly, the count value of the winning condition counter “12”
8 as a determination condition (ST110). If it is larger than "128", the probability is high (ST111), and if it is less than "128", it is low probability (ST112). In this embodiment, two winning probability tables of a low probability and a high probability are used. However, as the intermediate probability, a table having a probability approximately five times higher than the low probability is provided, and a total of three winning probability tables may be used.

The winning probability table thus determined and the second random number are collated and determined (ST113).
If the determination result is a hit, the winning symbol is stopped and displayed on the ordinary symbol display device 2 (ST114). In the case of a losing, the losing symbol is stopped and displayed (ST115). If the display symbol at this time is determined corresponding to the winning determination counter 53b, there is no need to provide a special symbol determination counter.

When the above-mentioned winning symbols are stopped and displayed, the starting winning port 4 is opened for a predetermined time in order to give a privilege to the player (ST116). When a game ball wins the opened start winning opening 4 and the start winning opening switch 31 detects a detection signal (ST117), the winning condition counter is decremented by "1" (ST118). This subtraction includes, in addition to the literal subtraction, addition of "-1" in the calculation by the computer.

Here, the meaning of subtracting "1" from the winning condition counter will be described. The above-mentioned “1” addition is intended to open the winning prize opening 4 to the player as a result to make it easier for the game ball to win. Therefore, when the game ball actually wins the starting winning prize hole 4, the player wins. The goal of facilitation has been achieved. Therefore, if the value obtained by adding “1” to the winning condition counter is subtracted by “1”, the value is canceled and returned to the initial state.

In this embodiment, when one game ball wins in the starting winning opening 4, the winning condition counter is decremented by "1". However, two winnings may be won and "1" may be subtracted. In addition, one prize may be won and “2” may be subtracted.

After a lapse of a predetermined time (ST11)
9), the start winning port 4 is closed (ST120). Or later,
This process is repeated.

FIG. 17 shows the transition of the difference ball number when the above correction function is used. In the figure, a solid line portion indicates a desired expected value, and a broken line portion indicates a case where the correction function is used. As can be seen from this figure, a locus close to the expected value can be drawn by using the correction function. The reason is that the case where the winning table with a low probability is set in FIG. 7 means that the winning condition counter value is low, that is, the random number lottery by the firing ball has a small number of hits. The probability that the winning opening 4 will be opened as a winning is reduced. This is because the number of difference balls increases. In FIG. 17, the trajectory starts to be drawn in a direction away from the expected value.

However, the random number lottery by the shooting sphere
Since it is controlled by the probability, there is always an opportunity to win the random number lottery, the value of the winning condition counter is increased, and a winning probability table with a high probability is set. In this case, the difference ball number moves in the positive direction, contrary to the case where the winning probability table with a low probability is set. In FIG. 17, this movement starts to draw a trajectory that changes in a direction approaching the expected value. When the above two operations are combined, a meandering line as shown by a broken line appears. Furthermore, since the hit for one launching ball and the one winning for the starting winning opening are equivalently offset, the number of difference balls is consequently used for random number extraction of the launching ball. Probability (winning rate)
Is controlled so as to follow.

The above is the description of the correction function of the first mode.

Next, as a second mode, the probability that the ordinary symbol display device 2 will stop in the specific mode, which is a condition for opening the starting winning opening 4, is set to one of a plurality of different probabilities. A method of selecting and controlling the opening probability of the start winning opening 4 based on the selected probability will be described.

First, the process of selecting one of a plurality of different winning probabilities set, ie, a winning probability setting function (setting of a winning probability table) will be described.
This will be described with reference to the flowchart of FIG.

At the start of the game, the pachinko gaming machine is turned on (ST201). Thereby, the microcomputer 50 checks whether the setting key is in the “ON” state. This check is performed as follows.

As shown in FIG. 10, the key portion of the setting key 61 is formed in a shape composed of convex portions 61a and 61c and a concave portion 61b. When the key portion of the setting key 61 is inserted through the key hole 65, the inside of the setting switching device 60 is located at a position corresponding to each of the concave and convex portions 61a, 61b, and 61c.
Three setting key switches 62a for detecting the shape of the key portion,
Setting key switch 62 having units 62b and 62c
Is installed.

Accordingly, when the setting key 61 is inserted into the key hole 65, if it is recognized that the setting key switch 62 has a convex-concave-convex shape, it is determined that the setting key is ON (ST202). ). In other words, the determination is made based on a combination of the "ON" and "OFF" signals of the predetermined setting key switch 62.

In this way, when it is determined that the combination of the output signals of the setting key switch 62 is correct, the key inserted into the setting switching device 60 is determined to be correct, and
The winning probability table can be set to a desired probability. Therefore, a setting changeover switch 64 that is a rotary switch is provided behind the setting key switch 62. The setting switch 64 has a configuration in which the inside of the tip of the setting key 61 is splined, and the spline portion and the setting switch 64 are engaged.

Therefore, as described above, the setting key switch 6
When it is determined that 2 is the correct key, when the inserted setting key 61 is rotated left or right, a signal is sent to the microcomputer 50 and the winning probability table provided in the ROM 50C is switched (ST20).
3).

As shown by reference numeral 70 in FIG. 11A, the winning probability table is stored in the ROM 50C as a table having six types of probabilities 1 to 6. At this time, information as to which winning prize probability table 70 is used is displayed as a numerical value of 1 to 6 on a digital display such as a 7-segment LED on a game board that cannot be seen by the player. .

When the winning probability table 70 is switched to one having a desired probability, the winning key table 70 is fixed by pulling out the setting key 61 on the spot (ST204). If the set winning probability table 70 is desired, it is not necessary to insert a setting key into the setting switching device 60 (in the case of “No” in ST202).

The game is started based on the probability set in the winning probability table 70 as described above.

Next, the second mode will be described with reference to the flowchart of the drive control of the start winning port 4 shown in FIG.

First, a game ball fired by the game ball firing device 20 is determined as a fired ball when both outputs of the fired ball right detection switch 21a and the fired ball left detection switch 21b are detected (ST301). . Upon detection of both outputs, one random number value is extracted from the counter as the first random number generation means at an appropriate timing (ST302). Then, the winning probability table 70 determined as described above is collated and determined with the random number value (ST
303) If it is a hit, the winning counter as counting means is incremented by "1" (ST304). If it is lost, the winning counter is not counted.

If a game ball that has returned without reaching the game area 10 is detected (ST 305), a random number extraction for the next shot game ball will be duplicated. Stops random number extraction at the next launch (ST
306).

When the game ball hit into the game area 10 wins the ordinary symbol operating gate 6 and passes through the ordinary symbol operating switch 7 (ST307), the operation of the ordinary symbol display device 2 is started (ST308). It is determined whether or not the winning counter is higher than a predetermined value (ST309). The predetermined value here is “128” as in the case of the first embodiment.

If the result of the determination is "YES", the winning symbol is displayed on the ordinary symbol display device 2 and stopped (ST31).
0), if “NO”, a lost symbol is displayed (ST
311).

When the winning symbol is stopped and displayed, the starting winning port 4 is opened for a predetermined time in order to give a privilege to the player (ST312). When a game ball wins in the thus formed starting winning opening 4 and the starting winning opening switch 31 outputs a detection signal (ST313), the winning counter is set to "1".
Subtraction (or "-1" addition) is performed (ST314). After a lapse of a predetermined time (ST315), the start winning port 4 is closed (ST316).

As described above, in the second mode, the difference from the first mode is that if the player hits the gate in ST303 and hits, the normal symbol display device 2 is always stopped and displayed with the winning symbol. It has become so.

Next, in the first and second aspects, random number extraction is performed at timing when a game ball is fired.
In a third mode described below, random number extraction is performed at a timing when a game ball wins in a specific area (usually a symbol activation gate 6).
At the timing when the detection signal is detected).

FIG. 13 is a flowchart showing a process until the start winning port 4 is driven and controlled. In the third mode, since the timing of the fired game balls is not required, the game balls start winning (passing) to the ordinary symbol operation gate 6 which is a specific area (ST401).
When the game ball passes through the gate, the ordinary symbol display device 2 starts operating at the timing when the detection signal of the ordinary symbol operation switch 7 provided in the gate is detected (ST4).
02), a random number value is extracted from the random number generation means (ST4)
03). And, as described for the second aspect,
The process of selecting one of a plurality of different winning probabilities set in advance, that is, a winning probability setting function (setting of a winning probability table) collates and determines a random number value with the determined winning probability table. (ST404). If the result of this determination is a hit, the winning symbol is stopped and displayed on the ordinary symbol display device 2 (ST405), and if it is lost, the lost symbol is stopped and displayed (ST406).

When the winning symbol is stopped and displayed, the starting winning port 4 is opened for a predetermined time in order to give a privilege to the player (ST407). After a certain period of time (ST4
08), the start winning port 4 is closed (ST409).

As described above, in the third mode, the control relating to the timing of the launch of the game ball is not performed at all, and the stop control of the symbol is performed based on the predetermined winning probability table triggered by the passage of the gate. Is performed.

Next, the fourth mode is a combination of the correction function described in the first mode and the winning probability setting function described in the second mode. Although not particularly shown in the flow chart, its function starts from the flow chart in FIG. 9 and ends in the flow chart in FIG. 7. The function shown in FIG. The setting switching device of FIG. 10 is set to one in advance, and the display of the ordinary symbol display device is stopped and controlled based on the set probability of the winning probability table.

Finally, as a fifth mode, a description will be given of a mode in which the operation procedure of another game is combined with the second mode. FIG. 14 shows a flowchart of processing of another game.

This separate game is a continuation of the flowchart of FIG. 12 in the second mode of the game. In FIG. 12, the fact that the game ball has won the starting winning opening is described so as to be used only for the counting process of the winning counter.
In FIG. 14, when there is a winning ball in the starting winning opening 4 (ST501), the special symbol display device 3 as the second variable display means starts variable display (ST502), and a third random number is extracted. Is performed (ST503). This third
Is extracted from the jackpot determination counter 53c and the symbol determination counter 53d in FIG. 5B, and is a timing at which the detection signal of the starting winning opening switch 31 provided in the starting winning opening 4 is detected. Thus, random numbers may be extracted one by one from the jackpot determination counter 53c and the symbol determination counter 53d, or random numbers may be extracted with a time difference.

As described in the second embodiment, the random numbers extracted in this manner are collated with one winning probability table previously selected by the setting switching device 60 (ST).
504).

Here, the concept of various winning probability tables used in the fifth mode will be described with reference to FIG.

First, the set value column 71 is divided into 1 to 6 levels. Then, there is a column 72 in which the hitting probability of the launching sphere is set. As described in the second embodiment, the winning probability table in which the random number value extracted at the timing of detecting the launching sphere is collated and determined has 1 to 6 stages. It is set as a probability. The columns of “unchanged” 75 and “unchanged” 76 below the column are special symbols in the special symbol display device 3 in the special game display device 3 in a special game, and are controlled to be stopped.
It means that the probability of hitting the launch sphere is kept higher than usual for a certain period after that (using a winning probability table with a high probability), which is generally called "probability fluctuation" is there.

Therefore, "probable change" means that the state is in the probability fluctuation state, and "no probability change" indicates that the state is not the probability change state, that is, the normal state.

The column of the normal symbol winning probability 73 sets the stopping probability at the winning symbol of the normal symbol display device 2 which is switched by the counter value of the winning condition counter of the correction function of the first embodiment. Low probability value 77 and high probability value 78
Is as described in the first embodiment.

The special symbol jackpot probability column 74 used in another game sets the stop probability of the special symbol display device 3 at the jackpot symbol as a probability of one to six levels.

The winning probability table as described above is stored in the ROM 50C of the microcomputer 50.

Referring again to the flowchart of FIG. 14, if the result of the collation determination is that the random number value is a big hit, the special symbol display device 3 is stopped and displayed with a big hit symbol (ST50).
5) In the case of a loss, the loss symbol is stopped and displayed (ST506). When the winning symbol is stopped and displayed, the special winning opening 5 is opened to give a privilege to the player (ST).
507).

The condition that the special winning opening 5 is repeatedly opened is, for example, that the game ball turns on the special winning opening switch 33 during a specific time period while the special winning opening 5 is opened for 30 seconds.
It is determined whether or not to satisfy (when there is a detection signal) (ST508). If the above condition is satisfied, the special winning opening 5 is opened again. If the condition is not satisfied, the special winning opening 5 is closed and another game is finished (ST509).

[0107]

As described above, according to the first aspect of the present invention, it is possible to minimize the adjustment of the winning rate by the human feeling to the starting winning opening as much as possible in the prior art. In addition, it is possible to prevent a variation in the winning rate of each game store. For a player, it is not possible to distinguish which pachinko gaming machine is advantageous just by looking at the pachinko gaming machine from the surface, so only those who have high skills in pachinko gaming as in the past, start winning a prize By checking the degree of adjustment of the nails around the mouth, it is possible to distinguish between pachinko machines that are easy to win in the starting winning opening and those that are not, eliminating inequality between players and playing each player equally Can be desired.

According to the second aspect, the winning rate for the starting winning port can be selected from a plurality of preset types with one pachinko gaming machine, so that the winning rate can be adjusted in more detail and the gaming shop On the part of the company, a variety of management can be performed, such as changing the winning rate every day. Furthermore, since the winning determination that the starting winning opening is opened is performed based on the shooting ball, there is no inequality caused by a difference in skill among the players.

According to the third aspect, the winning rate of the starting winning opening and the winning rate of the jackpot can be adjusted, so that the winning rate of the entire pachinko gaming machine can be easily adjusted.

According to the fourth aspect, as in the second aspect, the winning rate for the starting winning opening can be selected from a plurality of types with one pachinko gaming machine, so that the winning rate can be adjusted in more detail. At the same time, the amusement store can change the winning rate on a daily basis and carry out a variety of operations. Furthermore, since the winning determination that the starting winning opening is opened is performed based on winning in a specific area, the skill of the player until winning is not a little necessary, and as a result, the feeling of a conventional pachinko gaming machine is required. Can also be given.

According to the fifth aspect, the winning rate for the starting winning opening in two stages can be adjusted, so that the winning rate can be set more flexibly.

[Brief description of the drawings]

FIG. 1 is a front view showing a game board surface of a pachinko game machine as an example of a ball game machine according to the present invention.

FIG. 2 is a perspective view showing details of a variable winning ball device.

FIG. 3 is a perspective view showing details of a normal symbol operation gate.

FIG. 4 is a simplified diagram showing a relationship between a game ball launching device and an installation position of a detection switch.

FIG. 5 is a block diagram showing a control device of the pachinko gaming machine.

FIG. 6 is a diagram showing a configuration of a random number generation unit.

FIG. 7 is a flowchart showing operation processing of a correction function.

FIG. 8 is a graph showing transition of selection of a winning probability table corresponding to a winning condition counter value.

FIG. 9 is a flowchart showing an operation process of a winning probability setting function.

FIG. 10 is a perspective view showing details of a setting switching device.

FIG. 11 is an explanatory diagram showing the concept of a winning probability table.

FIG. 12 is a flowchart showing a driving process of a start winning opening in the second mode.

FIG. 13 is a flowchart showing a driving process of a start winning port in a third mode.

FIG. 14 is a flowchart showing an operation process of another game according to a fourth embodiment.

FIG. 15 is a graph showing a change in the number of difference balls in a normal pachinko game.

FIG. 16 is a graph showing a change in the number of difference balls due to a conventional nail adjustment.

FIG. 17 is a graph showing a change in the number of difference balls when the correction function is used.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Game board, 2 ... Normal symbol display device, 3 ... Special symbol display device, 4 ... Start winning prize port, 5 ... Big winning port, 6 ... Normal symbol operating gate, 7 ... Normal symbol operating switch, 9 ... Variable Winning ball device, 20: gaming ball launching device, 21: launching ball detection switch, 22: return ball detection switch, 30: starting winning opening solenoid, 31: starting winning opening switch, 32: large winning opening solenoid, 50: microcomputer 53, a random number generator, 60, a setting switching device, 61, a setting key, 62
... setting key switch, 64 ... setting changeover switch.

Claims (7)

[Claims] 1. A special winning ball detecting means for detecting that a game ball has won a specific area provided in a game area, and a variable display for starting variable display in response to a detection signal of the specific winning ball detecting means. Means, a start winning port that is configured to be convertible between a first state disadvantageous to the player and a second state advantageous to the player, and is set to start another game when a game ball wins; A starting winning ball detecting means for detecting a game ball winning the starting winning opening, and a variable display for controlling the occurrence of a stop state in a specific mode after the variable display of the variable displaying means is started based on a predetermined probability. A ball game machine comprising: a stop control unit; and a drive control unit that converts and drives the start winning port from the first state to the second state when the variable display of the variable display unit is stopped in a specific mode. The said The variable display stop control means includes: a fire ball detection means for detecting a game ball fired toward the game area; and whether a value of a random number generated in accordance with a detection signal of the fire ball detection means is a predetermined value. Determining means for determining whether or not the counting is performed, and counting means for performing an adding operation each time the determining means determines that the random number value is a predetermined random number, and performing a subtracting operation each time there is a detection signal of the starting winning ball detecting means. A plurality of stop probability setting means for setting different probabilities that the variable display means stops in a specific mode; and a stop for selecting one from the plurality of stop probability setting means based on a count value of the counting means. A ball game machine comprising: probability selection means; and controlling the variable display means to stop based on the probability set by the stop probability setting means selected by the stop probability selection means. 2. The variable display stop control means includes: first random number generation means for generating a random number in response to a detection signal from the launching ball detection means; and a random number in response to a detection signal from the specific winning ball detection means. And a second random number generating means for generating the second random number.
2. The ball game machine according to claim 1, wherein the stop probability selecting means operates after generating a random number from the random number generating means. 3. A special winning ball detecting means for detecting that a game ball has won a specific area provided in a game area, and a variable display for starting variable display in accordance with a detection signal of the specific winning ball detecting means. Means, a start winning port that is configured to be convertible between a first state disadvantageous to the player and a second state advantageous to the player, and is set to start another game when a game ball wins; A starting winning ball detecting means for detecting a game ball winning the starting winning opening, and a variable display for controlling the occurrence of a stop state in a specific mode after the variable display of the variable displaying means is started based on a predetermined probability. A ball game machine comprising: a stop control unit; and a drive control unit that converts and drives the start winning port from the first state to the second state when the variable display of the variable display unit is stopped in a specific mode. The said The variable display stop control means includes: a plurality of specific mode occurrence probability setting means for setting the display mode when the variable display of the variable display means is stopped to be different in a specific mode; and the specific mode occurrence probability setting means. Selecting means capable of appropriately selecting one of the above in advance; firing ball detecting means for detecting a firing ball fired toward the game area; and a random number generated in accordance with a detection signal of the firing ball detecting means. Is determined as the probability set in the specific mode occurrence probability setting means selected by the selection means, and a determination means for determining whether the random number is a predetermined value. A ball game machine, wherein the variable display means is controlled to stop in accordance with a result of the determination by the determination means. 4. As another game means for performing said another game, there is provided second variable display means for starting variable display in accordance with a detection signal of said starting winning ball detection means, and said variable display stop control means. A plurality of second specific mode occurrence probability setting means for setting the occurrence probabilities that the second variable display means is stopped in the second specific mode by a plurality of different types; A second selection unit that can appropriately select one of the probability setting units in advance, and a probability that a random number generated according to a detection signal of the starting winning ball detection unit becomes a second predetermined value, A second determination unit that determines whether the random number is the second predetermined value as the probability set in the second specific mode occurrence probability setting unit selected by the second selection unit. The second possibility according to the determination result of the determination means. Stop control the display mode of the display unit, the second ball-shooting game machine according to claim 3, wherein the benefit to the player when stopped at a particular manner. 5. A specific winning ball detecting means for detecting that a game ball has won a specific area provided in a game area, and a variable display for starting variable display in accordance with a detection signal of said specific winning ball detecting means. Means, a start winning port that is configured to be convertible between a first state disadvantageous to the player and a second state advantageous to the player, and is set to start another game when a game ball wins; A starting winning ball detecting means for detecting a game ball winning the starting winning opening, and a variable display for controlling the occurrence of a stop state in a specific mode after the variable display of the variable displaying means is started based on a predetermined probability. A ball game machine comprising: a stop control unit; and a drive control unit that converts and drives the start winning port from the first state to the second state when the variable display of the variable display unit is stopped in a specific mode. The said The variable display stop control means includes: a plurality of specific mode occurrence probability setting means for setting the display mode when the variable display of the variable display means is stopped to be different in a specific mode; and the specific mode occurrence probability setting means. A selection means capable of appropriately selecting one of the above in advance, and a probability that a random number generated in response to a detection signal of the specific winning ball detection means becomes a predetermined value is determined by a specific mode generation selected by the selection means. Determination means for determining whether or not the random number is a predetermined value as a probability set in the probability setting means, and stopping the variable display means according to a determination result of the determination means. And ball game machine. 6. A specific winning ball detecting means for detecting that a game ball has won a specific area provided in a game area, and a variable display for starting variable display in accordance with a detection signal of said specific winning ball detecting means. Means, a start winning port that is configured to be convertible between a first state disadvantageous to the player and a second state advantageous to the player, and is set to start another game when a game ball wins; A starting winning ball detecting means for detecting a game ball winning the starting winning opening, and a variable display for controlling the occurrence of a stop state in a specific mode after the variable display of the variable displaying means is started based on a predetermined probability. A ball game machine comprising: a stop control unit; and a drive control unit that converts and drives the start winning port from the first state to the second state when the variable display of the variable display unit is stopped in a specific mode. The said The variable display stop control means includes: a firing ball detection means for detecting a game ball fired toward the game area; and a probability that a random number generated according to a detection signal of the shooting ball detection means has a predetermined value. A plurality of random value probability setting means to be set; a random value probability selecting means capable of appropriately selecting one of the plurality of random value probability setting means in advance; and a detection signal of the launching ball detecting means. The probability that the generated random number becomes a predetermined value is set as the probability set in the random value probability setting means selected by the random value probability selection means, and it is determined whether or not the random number is a predetermined value. A counting means for performing an adding operation each time the determining means determines that the random number value is a predetermined random number value, and performing a subtracting operation each time a detection signal of the starting winning ball detecting means is present; The probability of stopping in a different manner A plurality of stop probability setting means, and a plurality of stop probability setting means for selecting one of the plurality of stop probability setting means based on a count value of the counting means, wherein the variable display means comprises: A ball game machine, wherein the variable display means is controlled to stop based on the probability set by the stop probability setting means selected by the stop probability selection means. 7. The variable display stop control means includes: first random number generation means for generating a random number in response to a detection signal from the launching ball detection means; and a random number in response to a detection signal from the specific winning ball detection means. And a second random number generating means for generating the second random number.
7. The ball game machine according to claim 6, wherein the stop probability selecting means operates after generating a random number from the random number generating means.