JP5003814B2 - Pachinko machine - Google Patents

Description

  The present invention relates to a pachinko machine that includes a display device that can display a plurality of symbols arranged in a game area, and whose winning probability varies according to the symbols displayed on the display device.

  Conventionally, some pachinko machines have an image display device such as a liquid crystal display and a starting port in the game area. When a game ball enters (wins) at the start opening, a computer built in the pachinko machine starts a process of outputting an image to the image display device, for example, a pseudo state showing a state where the drum of the slot machine rotates. An image (hereinafter referred to as “digital”) is displayed. In this image, for example, the symbols are displayed so as to flow from top to bottom, and the flow is stopped when a predetermined time elapses. And according to the arrangement | sequence of the pattern at the time of a stop, the privilege on a game is obtained. As a privilege, typically, a big winning opening is formed to greatly increase the winning probability of the pachinko machine. In addition, depending on the pachinko machine, a winning in a specific winning opening (usually closed) is set as a condition for forming a large winning opening, and digital symbols are arranged in a specific arrangement (for example, “7, 7, 7”). In some models, the specific prize opening opens. In any case, a state advantageous to the player (a so-called jackpot state, hereinafter simply referred to as a jackpot) is created.

  Therefore, when the start prize is generated and the digital begins, the player expects to obtain a privilege. Usually, the three digital symbols are stopped one symbol at a time, for example, in the order of left, right, and middle. If only two of the three symbols are stopped and both of the two symbols are “7” (so-called reach state), whether or not a privilege is obtained depending on whether or not the remaining middle symbol is “7”. At this point, the player's expectations are at its peak.

  The symbol displayed on the image display device is usually determined by the computer. For example, when starting winning, a random number of 1 to 256 is generated, and when the random number is 7, the symbols forming the specific arrangement are displayed. If it is not 7, the symbols other than the specific arrangement are displayed at random. Efforts have been made so that the probability of displaying a particular arrangement of symbols is almost the same as the apparent probability in order to achieve realism.

  For example, if 16 kinds of symbols are arranged in three places on the left, middle, and right, and the specific arrangement is that in which all the same symbols are arranged (for example, “7, 7, 7”), The types are 16 × 16 × 16 = 4096, and among these, there are 16 types of specific arrays, so the apparent probability (also referred to as display probability) is 16/4096 = 1/256. Since the random number is generated from 1 to 256, it should be a big hit with a probability equal to the display probability. The probability that the specific arrangement is actually displayed set in this way is hereinafter referred to as an internal probability.

  In addition to the specific arrangement, the probability of reaching a reach state has been set so that the internal probability is substantially the same as the display probability.

  However, it is not possible to make the design aspects as simple as those described above. In other words, if there is no difference in the design between the models, it will be uniform and will make the player bored. Therefore, the number of types of symbols is not 16 each, but various symbol modes such as 15 types, 16 types, 15 types, etc. from the left, and grouping (considering different symbols as the same symbol) are prepared. There is a case.

  However, if the design is complicated, the calculation of the probability becomes complicated, and it is difficult to match both the jackpot probability and the reach state probability to the display probability. In addition, as a privilege given to the player, there is a model that creates a state in which the internal probability is increased compared to the display probability, but in this model, the average of the state that is not increased and the increased state is displayed It is almost equal to the probability. And for these models, the calculation of probability settings is even more difficult.

The present invention has been made in view of these problems, the pachinko machine according to claim 1, together with the ease of design, not tired to the player, and to have a variety of design aspects, the Yu technique willingness The aim is to provide an enhanced pachinko machine.

A pachinko machine according to claim 1 of the present invention made to achieve such an object is provided in a game area by a display means for displaying a plurality of types of symbols and a passage sensor previously installed at a predetermined location. When the passage of the game ball is detected, the after performing fluctuations displayed on the display means, and a symbol control means for displaying a predetermined symbol by stopping the variable display, wherein the display after the variable display symbols displayed on the unit, if it becomes specific symbol that is set in advance, in the pachinko machine prize probability to winning hole is high, the symbol control means, the number of symbols that is displayed on the display means Displaying the specific symbol on the display means at an internal probability that the specific symbol is actually displayed is lower than the display probability that the specific symbol determined from is displayed , Of a particular design When a special symbol that is at least one type stops, the number of symbols is reduced to increase the display probability, and when the number of symbols is reduced, a symbol of a different type from the symbol before the number of symbols is reduced. It is a means for displaying .

It is a block diagram showing the front surface of the pachinko machine of an Example. It is explanatory drawing explaining the display state of the display apparatus provided in the pachinko machine of an Example. It is a block diagram showing the structure of the control apparatus provided in the pachinko machine of an Example. It is a flowchart showing the game process performed with the pachinko machine of an Example. It is a flowchart showing the start winning process performed with the pachinko machine of an Example. It is a flowchart showing the slot display process performed with the pachinko machine of an Example. It is a flowchart showing the jackpot process performed with the pachinko machine of an Example.

In the pachinko machine according to claim 1, when the passing of the game ball is detected by a passage sensor previously set at a predetermined location, the symbol control means displays the fluctuation on the display means and then stops the fluctuation display. To display a predetermined design. Here, examples of the display means include a liquid crystal display capable of displaying a plurality of symbols arranged at the same time, a device that rotates a plurality of drums imitating a slot machine, and a single-digit 7-segment display device as a simple mode. Before and after, the passage sensor is provided at the gate provided in the game area when the display means is a one-digit 7-segment display device, and there are many aspects that detect balls passing through the display sensor. In the case where the means is a liquid crystal display or a plurality of drums, there are many embodiments in which the means is provided in the start opening and a winning at the start opening is detected.

  When the symbol displayed in this way becomes a specific symbol set in advance, the winning probability is increased. That is, the player is in an advantageous state. Here, as a method of increasing the winning probability, a method of opening a normally closed winning opening or making it easy for a game ball to enter an existing winning opening is conceivable. A specific example of the former includes opening of a so-called attacker, and an example of the latter is an operation of a so-called electric tulip.

Further, in the pachinko machine, the symbol control means displays the display means with an internal probability lower than the probability (that is, the display probability) that a specific symbol determined from the number of types of symbols that can be displayed on the display means is displayed. A specific symbol is displayed on the screen. Needless to say, when the display means is configured to display a plurality of symbols at the same time, such as the liquid crystal display or the plurality of drums, the number is also necessary for calculating the display probability.

For example, if the display means is a liquid crystal display that can display three kinds of 16 symbols arranged, and the specific symbols are all the same symbols arranged, the probability that the specific symbols are displayed is: The value is determined from the number of types of symbols that can be displayed on the display means, and the value is 1/256 as described in the column of [Prior Art]. The symbol control means displays a specific symbol on the display means with a lower probability (for example, 1/300 ) .

In the conventional pachinko machine, since the difference between the internal probability and the display probability is ± 10%, the “ low probability” here means that there is a difference larger than this. Therefore, according to the pachinko machine described in claim 1, it is not necessary to match the value of the internal probability with the value of the display probability, and the design can be facilitated. In addition, the display probability is not constrained by the internal probability, so that the design can be complicated. For example, when a preset game condition is established, the display probability can be changed by reducing the number of symbols from 16 types to 10 types. If it does in this way, it will become possible to create various design forms, and it can be set as a pachinko machine that a player does not get tired of.

Pachinko machine according to claim 1, also from Table示確rate, to display a specific symbol on the display means at a low probability. If it carries out like this, it will become possible to reduce the number of the symbols displayed on a display means. For example, even if the internal probability is 1/256, the number of symbols that can be displayed is 10 each for the left, middle, and right, and a specific symbol is the same when all three symbols are the same (in this case, a specific symbol) The probability that the symbol is displayed can be 1/100). In this way, it is possible to reduce the cost for creating a symbol and to simplify the control for displaying the variation.

  It is also possible to set a symbol that can be grouped with an arbitrary symbol. If such a symbol is introduced, the display probability becomes very high, which is not preferable for the business of pachinko halls.However, by reducing the internal probability below the display probability, the impression that it is easy for customers to hit It becomes a model that can be given and can increase gaming motivation.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a block diagram showing the front surface of a pachinko machine 2 that is an embodiment of the present invention. As shown in FIG. 1, in the pachinko machine 2, a display device that displays various images on the center upper part of the game area 4 provided on the game board surface and serves as both the display means of the present invention and the symbol arrangement means. 6 is arranged, and below that, a variable winning device 8 that can be changed to an open state in which a game ball can be easily received is arranged.

  When the display device 6 wins a game ball in one of the starting port 10a provided between the display device 6 and the variable winning device 8 and the starting ports 10b and 10c provided on the left and right of the variable winning device 8 itself, As shown in FIG. 2, the three symbols Z1, Z2, and Z3 made up of numbers and alphabets arranged side by side in the horizontal direction are changed and displayed for a predetermined time, and each symbol Z1 to Z3 is displayed as Z1, after a predetermined time has elapsed. A so-called digital display in which Z3 and Z2 are stopped and displayed in this order is performed. In FIG. 2, there is a horizontally long rectangular area G above the area where the symbols Z1 to Z3 are displayed. When it is determined that the symbols Z1 and Z3 are in the reach state by the processing described later. Will display the word “reach”. In the drawing, “reach” is displayed in the region G, but this is shown for convenience of explanation. In the pachinko machine 2, Z1 to Z3 are “1, 2, When “3” is displayed, “reach” is not displayed.

  Returning to FIG. 1, in the lower part of the display device 6, when a shot ball wins further to the start ports 10 a to 10 c during the symbol change display, the number corresponding to the number of times of winning (up to 4) lights up. In the pachinko machine 2, if the change of the design of the display device 6 is stopped, the LED that forms the start memory indicator 12 is lit. One of the lights is turned off, and the symbol change display on the display device 6 is resumed.

  In FIG. 1, 14 is a top prize opening (general prize opening) provided at the top of the display device 6, and 16 a, 16 b and 18 a, 18 b are provided on the left and right sides of the display device 6 and the variable prize winning device 8, respectively. 20a-20f is a windmill as a rolling ball guiding member, 22 is an upper part for storing a pachinko ball to be launched into the game area 4 and discharging prizes according to the prize A receiving tray 24 is a speaker that produces a sound corresponding to the winning state. Reference numeral 26 denotes a launching handle that is rotated to launch a pachinko ball, and is set so that 100 pachinko balls are fired at a rate of 1 per minute by a launching device (not shown).

  On the other hand, the variable winning device 8 is attached to the game board surface of the pachinko machine 2, and an opening / closing plate 28 that is opened and closed by a solenoid (not shown) is provided at the center upper portion of the front surface. When the three symbols stopped and displayed on the display device 6 are in a specific arrangement (for example, “7, 7, 7”), the opening / closing plate 28 is opened forward as shown in FIG. A special winning opening 30 as a special winning opening is formed, and the pachinko machine 2 is in a jackpot state with a higher probability of winning than the normal state. The opening / closing plate 28 closes when either a predetermined time elapses after the symbols displayed on the display device 6 are aligned or when it is detected that ten firing balls are won in the big winning opening 30. Has been.

  Moreover, the inside of the special winning opening 30 is divided into three, and the central part is a specific area 32 for continuing the big hit state. When the game ball passes through the specific region 32, the open / close plate 28 is opened again after the open / close plate 28 is closed, and the big hit state continues. In the pachinko machine 2, the maximum number of times that the opening and closing plate 28 opens and closes during the big hit state is set to 16 times.

  Next, the control device 34 provided on the back of the game board of the pachinko machine 2 will be described with reference to FIG. The control device 34 includes a start winning switch 36a that detects a shot ball that has won a prize in the start opening 10a, a start winning switch 36b that detects a shot ball that has won a prize in the start opening 10b, and a start prize that detects a shot ball that has won a prize in the start opening 10c. A switch 36c, a count switch 38 for a big prize opening that detects a shot ball that has won the big prize opening 30, a continuous prize switch 40 that detects a shot ball that has passed through the specific area 32 of the big prize opening 30, and the firing handle 26 are turned. An input circuit 44 that inputs each detection signal from the launching handle switch 42 that is turned on when the pachinko ball is being fired and is displayed, and a display device based on each of the detection signals acquired through the input circuit 44 6 stores a control program executed by the CPU 46 and a CPU 46 that executes a control program for controlling the variable winning device 8 and the like. ROM 48, RAM 50 that temporarily stores data processed by CPU 46 and has a backup function capable of retaining stored contents even when the power is turned off, and image ROM 52 that stores image data of an image that CPU 46 displays on display device 6. Based on instructions from the CPU 46, the display device 6, the start memory display 12, the solenoid 54 for opening and closing the opening / closing plate 28 of the variable winning device 8, and the lamp provided in the game area 4 of the pachinko machine 2 Information signals indicating that the pachinko machine 2 is in a big hit state, the number of continuations of the big hit state, and the like to an external information terminal 58 connected to a hall management computer (not shown). Is output from the speaker 24 via the output circuit 60 and the amplifier 62. A regulator 64, and a, a bus 66 for connecting the respective units.

  A recovery path (not shown) is provided on the back side of the game board of the pachinko machine 2 for collecting the winning balls that are awarded to each winning opening, and a start winning switch 36a and a large winning opening count switch 38 are provided. Are attached to collection paths respectively arranged at the lower part of the starting port 10a and the lower part of the variable winning device 8. The start winning switches 36b and 36c are provided around the starting openings 10b and 10c, respectively, inside the variable winning apparatus 8, and the continuous winning switch 40 is provided below the large winning opening 30 inside the variable winning apparatus 8. Is provided.

  The image ROM 52 stores symbol data for displaying the symbols Z1 to Z3 on the display device 6 and image data for displaying various images on the display device 6. In the control device 34 configured as described above, the CPU 46 performs overall control of the pachinko machine 2 by executing game processing. Therefore, game processing executed by the CPU 46 will be described below.

  First, FIG. 4 is a flowchart showing game processing. When execution of this game process is started, it is first determined in step (hereinafter simply referred to as S) 110 whether or not there is a start winning memory. That is, in the past, it is checked whether or not the winnings that have occurred in the starting ports 10a to 10c are held. Whether or not there is a start winning can be known by monitoring the state of the start winning switches 36a to 36c at any time in the start winning process. That is, the start winning switches 36a to 36c correspond to the passage sensors of the present invention. The start winning process performs various processes necessary when the switches 36a to 36c are turned on. This start winning process will be described in detail with reference to FIG.

  FIG. 5 is a flowchart showing the start winning process. First, in S210, it is determined whether or not there has been a start prize. That is, it is checked whether the start winning switches 36a to 36c are turned on. Actually, the start winning process is started by a timer interrupt described later, and each time it is determined whether or not the start winning switches 36a to 36c are turned on. If they are turned on, the processes after S220 are performed. Therefore, the process is performed when a start prize is received regardless of the gaming state such as the variable display or the big hit.

  If a start winning has occurred, the process proceeds to S220 and a random number is output. Here, the random numbers are five numerical values extracted from the values of five loop counters (hereinafter also simply referred to as counters) that are driven based on a clock included in the CPU 46. More specifically, for example, a timer interrupt is generated every 2 msec, and the value of the first counter is incremented by 1 each time. The value of the first counter is reset to zero every time it reaches 400, and 400 values from 0 to 399 are output. The second and third counters are substantially the same, and both output a total of 16 values from 0 to 15. The fourth counter is incremented by 1 every time the value of the third counter becomes zero and outputs a value of 0 to 15, and the fifth counter is incremented by 1 every time the value of the fourth counter becomes zero. Increased to output a value of 0-15. That is, this random number output is also performed by a program executed by the CPU 46, but the description thereof is omitted here. The process of S220 is a process that serves as both the random number generation unit and the reach random number generation unit of the present invention. And the symbol displayed on the display device 6 is set based on the values of these five counters. Specifically, the values of the third to fifth counters correspond to the symbols Z1 to Z3, respectively. This correspondence is shown in [Table 1].

  The random numbers generated in this way are stored in the RAM 50 up to four sets of five values of the first to fifth counters as one set. This is the start winning memory. Each time one set is stored, one LED of the start memory display 12 is turned on. Subsequently, the process proceeds to S230, and it is determined whether or not the random number output in S220 is a value for reaching a reach state. In the pachinko machine 2, when the value of the first counter is 0 to 38, the pachinko machine 2 enters the reach state regardless of the values of the third and fifth counters. That is, the process of S230 corresponds to the process as reach determination means of the present invention. If the value of the first counter is other than 0-38 and the value of the third counter is the same as the value of the fifth counter, the Z3 symbol is replaced and the reach is reached. Avoid getting into a state.

  If the value of the first counter is 0 to 38, the process proceeds to S240, and the character “reach” is output to the region G as a notification image. If the value of the first counter is 39 or more, the process skips S240 and ends the start winning process. Here, it returns to the game processing of FIG. In S120, a process as the symbol setting means of the present invention is performed for actually setting a symbol to be output to the display device 6 based on the above-mentioned [Table 1] from the random number output in S220 of the start winning process. However, when the value of the first counter is 100, it is displayed in a specific arrangement regardless of the values of the third to fifth counters, and is displayed corresponding to the 16 types of values of the second counter. Design to be decided. This correspondence is shown in [Table 2].

  Thus, in the pachinko machine 2, the specific arrangement is such that “1, 1, 1” and “F, F, F” are arranged. When one of these is output to the display device 6, the opening / closing plate 28 is opened. In some cases, when the value of the first counter is not 100, the third to fifth counters output values for a specific arrangement (when the values of the third to fifth counters are all 2). However, in this case, the design that should be originally set is replaced so as not to have a specific arrangement. For example, when the values of the third to fifth counters are all 2, “2, 2, 2” should be set according to [Table 1], but “3” is set by replacing Z3.

  When the symbol setting is completed in this way, the process proceeds to S130, and slot display processing for outputting the set three symbols (hereinafter simply referred to as “set symbols”) to the display device 6 is performed. As described above, the display device 6 is a liquid crystal display and does not have a drum or a stop button as in the slot machine, but displays a set symbol after displaying a large number of symbols from the top to the bottom by scroll display. This is reminiscent of a slot machine. The contents of this slot display process are shown in FIG.

  FIG. 6 is a flowchart showing the contents of the slot display process. In this process, the left symbol variation process (S310), the right symbol variation process (S320), and the middle symbol variation process (S330) are further performed. Each symbol is changed little by little, and each process is repeated a plurality of times to perform scroll display and the like, and finally one of the set symbols is displayed. That is, when this processing is started, first, the left symbol variation process is performed in S310 to change the symbol of Z1, then the right symbol variation processing of S320 is performed to change the symbol of Z2, and then S330 is shown. The middle symbol variation process is performed to change the symbol of Z3. As described above, since the three symbols are stopped in the order of Z1, Z3, and Z2, the symbols that have been stopped prior to the other symbols are not passed through the respective processes and passed through.

  In S340, it is determined whether or not the left symbol, that is, Z1 is stopped. If it has stopped, it will progress to S350 and will determine whether it will be in a reach state, when the design of Z1 and Z3 is stopped. That is, the same determination as that performed in S230 of the start winning process is performed. If the reach state is reached, the process proceeds to S360 and the notification image output in S240 of the start winning process, that is, the “reach” display is turned off.

  When “reach” is not displayed in the area G, the process of S360 is not performed even if Z1 is stopped. In subsequent S370, it is determined whether or not there is any random number that is generated at the time of starting winning and stored in the RAM 50 and that causes a reach state. It is assumed that the random number that caused the process to be activated has been deleted from the RAM 50. If there is a random number that reaches the reach state, the notification image once stopped in S360 is output to the display device 6 again.

  Subsequently, in S390, it is determined whether or not all of the set symbols Z1, Z2, and Z3 are displayed. If yes, the slot display process is terminated. If not, the process returns to S310, and S310 to S330. Repeat the process until the set symbol is displayed. If it is determined in S340 that the left symbol is not yet stopped, if it is determined in S350 that the symbols Z1 and Z3 are not the same (that is, reach state), or in S370 as the start winning memory. If it is determined that the random number that reaches the reach state is not held in the storage in the RAM 50, the process goes straight to S390.

  As described above, the left symbol variation process, the right symbol variation process, and the middle symbol variation process are performed in a stepwise manner as in the time division process. Is displayed as if it is running. That is, the slot display process is a process that serves as both the symbol control means and the reach control means of the present invention. Then, the symbol scroll is stopped in the order of Z1 → Z3 → Z2, and the set symbols are displayed. When the symbols of Z1 and Z3 are the same, the notification image is temporarily deleted when Z1 is stopped, and the notification image is displayed again only when there is a random number in the start winning memory that reaches the reach state. Is output.

  From the player's point of view, this slot display process is simply a process of digital when “reach” is not displayed, but when “reach” is displayed, not only digitally, In the process of S350 to S360, the process of informing which change display the “reach” display corresponds to whether or not the “reach” display is once turned off. If the “reach” display disappears when Z1 is stopped, it is a notification image for the current display device, and if it does not disappear, it is a notification image corresponding to another start winning memory.

  Here, it returns to the game processing of FIG. When the set symbol is output to the display device 6 in this way, the process proceeds to S140, and it is determined whether or not the displayed symbol is one of the 16 types of winning symbols shown in [Table 2]. If not, the process returns to S110 to determine again whether there is a start winning memory, and if so, the jackpot process of S150 is performed. The contents of the jackpot processing are shown in FIG.

  FIG. 7 is a flowchart showing the jackpot process. When the process is started, first, a moving image is output to the display device 6 in S610. This moving image is output to the display device 6 during the big hit state instead of the digital image displayed with the start winning. In subsequent S620, the solenoid 54 is driven to open the opening / closing plate 28.

  Next, it progresses to S630 and it is determined whether opening of the opening-and-closing board 28 is interrupted. As described above, there are two criteria for the pachinko machine 2, one of which is that a predetermined time (25 seconds in this case) has passed since the opening / closing plate 28 is opened, and the other is that the prize winning port 30. That is, 10 game balls have been won. When at least one of these is established, the process proceeds to S640, and the opening / closing plate 28 is closed. If neither is established, S630 is repeated to wait.

  When the opening / closing plate 28 is closed in S640, it is determined in S650 and S660 whether or not the big hit state is terminated. First, in S650, based on the continuous winning switch 40, it is determined whether or not the game ball has passed through the specific area 32. If it has not passed, the process proceeds to S670 to stop the output of the moving image and the jackpot process is terminated. If it has passed, it is determined in S660 whether or not the opening / closing plate 28 has been opened 16 times since the jackpot process was activated. If it has not reached 16 times, the process returns to S620 to form the big prize opening 30 again. If it has been opened 16 times, the jackpot process is terminated.

  That is, in the jackpot process, the pachinko machine 2 is put into a jackpot state, and in the jackpot state, a moving image is output to the display device 6, and the jackpot state is terminated and returned to the normal state based on the above conditions. Returning to FIG. 4, when the jackpot processing is completed in this way, the process shifts to S110 and waits for the start prize again. As described above, in the pachinko machine 2, the gaming state is changed variously by repeating the processing of S110 to S150.

  According to the pachinko machine 2 configured as described above and performing the processing shown in FIGS. 4 to 7, the symbols displayed on the display device 6 are 16 types of symbols Z1, Z2, and Z3. Since there are 16 types of specific arrays, the probability of a big hit is 16 / (16 × 16 × 16) = 1/256, but the big hit actually takes a value from 0 to 399. Since the first counter that can be reached becomes 100, it becomes 1/400. Similarly, the probability of reaching the reach state is calculated as 1/16 from the symbol displayed on the display device 6, but in actuality, when the first counter reaches 0 to 38, and when it is a big hit Therefore, (39 + 1) / 400 = 1/10.

  Therefore, the player feels that the probability of a big hit is high, and can increase the game motivation. In addition, since the probability of reaching the reach state is higher than the display probability, it is unlikely that a situation of “not reaching the reach state, let alone the big hit” will occur, and the willingness to play can be maintained.

  In addition, since it is not necessary to match the display probability in this way, the design of the first counter and the like becomes easy. The pachinko machine 2 that is one embodiment of the present invention has been described above, but the present invention is not limited to this embodiment and can be implemented in various modes. For example, in the pachinko machine 2, the difference between the display probability of the display device 6 and the internal probability is always constant, but may be varied. As an example, normally, as described above, the probability of being a big hit is 1/400, but when “7, 7, 7” is displayed on the display device 6, the probability increases to 1/50. It is done. This is similar to a conventional probability fluctuation machine, except that the average probability is different from the display probability. In such a conventional probability change machine, it is necessary to match both the average probability of reaching the jackpot and the average probability of reaching to the respective display probabilities, but this labor can be eliminated.

  Further, instead of changing the internal probability in this way, the display probability may be changed. For example, in the pachinko machine 2, there are 16 types of symbols Z1, Z2, and Z3 that can be displayed on the display device 6. However, when “7, 7, 7” is displayed on the display device 6, there are 10 types of symbols. You may make it reduce to. In this way, the display probability is 1/100, which is different from both 1/400 and 1/50. Further, instead of simply reducing the number of symbols, 10 types of symbols that are completely different from the 16 types of symbols in the normal state may be displayed. In this way, by making the internal probability and the display probability different from each other, the pattern aspect can be further complicated. In addition, if the specifications of the model are evaluated based only on the internal probability, the design can be made completely free. Therefore, it is possible to make a design that inspires the game motivation, or to prepare a more complex design as the probability calculation is difficult.

  By the way, some pachinko machines have a starting gate, a normal symbol display device, and an electric tulip in the game area 4. The normal symbol display device is usually a one-digit 7-segment display device. The electric tulip opens and closes two members attached so as to be swingable upward from both sides of the starting port 10a. When this is opened, the game ball easily wins the starting port 10a. . When the game ball passes through the start gate, the normal symbol display device is started, and the displayed numbers are changed one after another, and the change is stopped after several seconds to several tens of seconds. When the number displayed at this time is 7, for example, the electric tulip is operated to make it easy to win the starting port 10a only for a few seconds. Conventionally, the probability that this normal symbol display device displays 7 (internal probability) has been almost the same as the display probability in the past, but this may also be different from the internal probability of the display device 6. If it carries out like this, a freedom degree will arise in the control which displays 7 on a normal symbol display apparatus, and design will become easy.

DESCRIPTION OF SYMBOLS 2 ... Pachinko machine 4 ... Game area 6 ... Display apparatus 8 ... Fluctuation winning apparatus 10a-10c ... Starting port 12 ... Start-up memory display 26 ... Launching handle 28 ... Opening / closing plate 30 ... Large winning port 32 ... Specific area 34 ... Control apparatus 46 ... CPU 48 ... ROM 50 ... RAM 52 ... Image ROM
54 ... Solenoid 56 ... Illuminating device 64 ... Sound generator 66 ... Bus Z1, Z2, Z3 ... Design

Claims (1)

Display means provided in the game area and displaying a plurality of types of symbols;
When the passage of the game ball in advance by the installed passage sensor at a predetermined position is detected, after performing fluctuations displayed on the display unit, the symbol control means for displaying a predetermined symbol by stopping the variable display,
In the pachinko machine in which the winning probability to the winning opening is increased when the symbol displayed on the display means after the variable display is a specific symbol set in advance,
The symbol control means,
Lower than the display probability that a particular symbol is determined from the symbol number that is displayed on the display means is displayed by actually the internal probability that a particular symbol is displayed, the specific symbol on the display means display and,
When a special symbol that is at least one of the specific symbols set in advance is stopped, the display probability is increased by reducing the number of symbols,
A pachinko machine characterized in that, when the number of symbols is reduced, the symbol is a means for displaying a symbol of a different type from the symbol before the number of symbols is reduced .

Images