JP4424964B2 - Slot machine with fraud protection function - Google Patents

Description

The present invention relates to a slot machine that can win a winning medal by stopping a plurality of rotating reels (rotating drums) so that symbols, symbols, and the like attached to each reel are in a predetermined arrangement. Torso-type gaming machine).
In particular, the present invention sequentially counts a number within a predetermined range, uses the number counted at the timing corresponding to pressing of the start lever as a random number, and converts the random number into a slot machine used for internal lottery. By analyzing the gaming situation of the slot machine and changing the random number conversion method when the prescribed conditions are met, fraudulent acts that illegally acquire winnings using unauthorized devices etc. are prevented It relates to slot machines with fraud protection functions.

Generally, a slot machine displays a pattern such as a predetermined pattern, characters, numbers, etc. (hereinafter collectively referred to as “symbol”) when a player inserts a game medal as a game medium and presses a start lever. Multiple (usually 3) reels start rotating, and by pressing multiple (3) stop buttons corresponding to each reel at an arbitrary timing, the rotating reels stop and the symbols of the stopped reels This is a gaming machine in which a predetermined number of medals are paid out according to the arrangement.
In this type of slot machine, generally, a plurality of reels are automatically controlled with a certain probability in order to increase the fun of the game, etc., and the symbols attached to each reel are stopped so as to have a predetermined arrangement. A so-called “winning” winning control is performed.

In this internal winning control, when the game is started by pressing the start lever, the internal winning lottery (internal lottery) is automatically performed inside the slot machine for each game, and the winning contents (various wins and loses) And the reel stop position is controlled according to the winning details. When a predetermined winning content is won, each reel is within a certain range regardless of the timing when the player presses the stop button. The symbols attached to are controlled so that the symbols are arranged in accordance with the contents of the winning prize, whereby a predetermined amount of medals are paid out.
Specifically, as a result of the internal lottery, when a predetermined winning content is won, a plurality of rotating reels are within a certain range (for example, within a range of four symbols from the position of the corresponding symbol) and the player Regardless of the timing of pressing each stop button, the symbols on the winning line are “7, 7, 7”, “BAR, BAR, BAR”, “Watermelon / Watermelon / Watermelon”, “Bell / Bell / Bell”, etc. Stop control (winning control) is performed so as to obtain a predetermined arrangement corresponding to the winning content.

As a result of the reel stop control being performed, the pressing timing of the stop button corresponding to each reel is deviated from the timing at which the symbols ("7" and "BAR") constituting an array of a winning content are stopped on the array. However, if the deviation is within a certain range (within the range of four frames from the symbol, etc.), the symbol is stopped by mechanical control so that the symbol is positioned on a predetermined winning line, and a winning arrangement is formed. The
As a result of this stop control, regardless of the skill of the game, if the player presses the stop button within a certain range, the reels stop so that the symbols are in a predetermined winning arrangement. A predetermined amount of medals corresponding to the stopped winning arrangement will be paid out.

Here, such reel stop control includes “retraction control” for stopping the reels so that a predetermined symbol arrangement is aligned, and “winning prevention control” for stopping the reels so that a certain symbol arrangement is not aligned. is there. In the winning prevention control, for example, when a certain winning content is won, the reels are stopped during the game so that the symbols of other winning details are not arranged.
In general, several kinds of winning contents are set as the winning contents for which such reel stop control is performed, and any winning contents are determined for each game by an internal lottery.
The contents of the award are, for example, bonus games such as “Regular Bonus (RB)” and “Big Bonus (BB)” that allow a large amount of medals to be paid out, “Small” with a small amount of medals, and medal insertion There are several types, such as “replay” that can be played without a game, and “losing” that does not pay out medals, and a predetermined number of winning medals are paid out according to the content of each winning decision. The reels are controlled to be stopped so as not to occur.

For example, in the case of “small role”, the reels are arranged in a pattern arrangement in which several (for example, 1 to 15) medals are paid out in one game unit (for example, an arrangement in which “bell” symbols are aligned in a horizontal row). The reels are controlled to stop (pull-in control), and the reels are controlled to stop (Prize Blocking Control) so that other winning symbol patterns (for example, “7 / 7.7” indicating “big hit”) are not aligned.
In the case of “RB”, after winning the lottery, a bonus game is started (winning) when a predetermined winning pattern (for example, “BAR, BAR, BAR”) is prepared, and a bonus game in which several games are set as one set thereafter. Reel stop control is performed, and during the bonus game, the reels are continuously controlled to give a “big win” symbol arrangement with a “small role” and a large payout, and more than 100 medals are paid out. It comes to be.

Similarly, in the case of “BB”, after winning the lottery, the big bonus game is started (winning) when a predetermined winning symbol (for example, “7.7.7”) is prepared, and the bonus game as described above. The reel is controlled so that (RB) is continuously performed for several sets (usually three sets), and the game is set and controlled so that hundreds of medals are paid out.
If the result of the lottery is “losing”, the reels are controlled to stop so that the symbols are arranged in an arrangement in which no medals are paid out (an arrangement in which none of the winning symbols are arranged) (winning prevention control).

  In the slot machine in which the reels are controlled to stop in this way, a certain amount of game media is provided on the condition that if a specific winning content such as BB or RB is won as a result of the internal lottery, the game will be won in the following game Is surely paid out, making it extremely attractive to players. In other words, for a slot machine player, winning a specific winning content such as BB, RB, etc. by internal lottery is of greatest interest.

Here, in the internal lottery, the probability of winning content is controlled to a predetermined size. That is, the internal lottery in the slot machine is generally performed using a random number generator and a lottery table, and the random number generator repeatedly counts numbers within a predetermined range in order. In some cases, the contents of winning a prize are assigned to a specific area in ().
Then, it is determined whether or not the winning content is won by determining whether or not the number counted at the timing when the player presses the start lever is the number assigned to the winning content by using the lottery table. Has been done.

For example, in a certain slot machine, one cycle for generating a random number is about 2.7 milliseconds, during which about 16,000 numbers are counted. Some of them use a lottery table in which various winning contents are associated with numbers from 0 to 5,000. In a slot machine using such a lottery table, it is possible to win some prizes with a probability of about one third, but since one cycle is a very small value of about 2.7 milliseconds, It is impossible for a human sense to press the start lever aiming at a timing at which a one-third prize winning content can be hit.
Therefore, the random number generated by the random number generator is truly random, and the winning probability of the internal lottery in the slot machine is normally obtained as set in the lottery table.

However, in such a slot machine, the winning content is fixed at a specific position in the above counting cycle, so if the start lever is pressed at the same timing in the same cycle, the theoretically the same random number Will occur. This means that it is possible to always win the same winning content by once winning the winning content and pressing the start lever at a certain timing.
In addition, fraudulent acts with weak points in such an internal lottery of slot machines have occurred and become a problem.

In other words, by depressing the start lever using a special device, an act of randomly drawing the winning contents in the count cycle as described above and assigning the winning contents illegally (hereinafter referred to as such illegal actions). The person who performs is referred to as a fraudster). Such illegal acts (so-called “goto”) include what are called solenoid goto, sensory device goto, and harness goto.
For example, a solenoid got makes it possible to press a start lever at regular intervals using a solenoid. Then, by adjusting the timing of depressing the start lever, adjustment is made until winning is obtained, and once winning is achieved, the winning is almost automatically performed thereafter. Further, by repeating the adjustment, it is possible to aim for a winning combination such as RB or BB.

For this reason, various technical researches and developments have been conducted in order to prevent such illegal acts. For example, in the invention described in Patent Document 1, the bit sequence of random numbers is reversed by hardware, and the time for winning an internal lottery can be distributed within the cycle of random numbers.
Further, in the invention described in Patent Document 2, a winning time zone having a certain width is prevented from occurring by distributing random numbers using a predetermined calculation formula.
If these random number generation methods are used, the winning range of the internal lottery can be distributed within the random number generation cycle, so it will be difficult to win a prize using a solenoid or the like that has been used for illegal activities. .

JP 2000-24286 A JP 2001-37955 A

However, even if such a conventional random number generation method is used, there is a problem that the winning position in the random number generation cycle is periodically fixed.
That is, according to the invention described in Patent Document 1, the winning range in the internal lottery can be widely dispersed within the random number generation period, but the winning position is the same position and fixed in each period. Further, according to the invention described in Patent Document 2, the winning range in the internal lottery can be widely dispersed within the random number generation period, and the winning positions can be dispersed for each period. However, the winning position is fixed every certain period.
Therefore, as long as the winning position is fixed, the winning position can be aimed at, so that there is a problem that fraudulent action becomes possible by improving the performance of the unauthorized device.

  The present invention has been proposed in order to solve the above-described problems of the conventional technology. When the gaming situation of the slot machine is analyzed and a predetermined condition is met, random number conversion is performed. By changing the method itself, without changing the basic parameters such as the random number size and the winning probability, not only the winning positions are dispersed in the internal lottery, but also the winning positions are prevented from being fixed, It is an object of the present invention to provide a slot machine with an illegal defense function capable of eliminating an illegal act of illegally acquiring a winning using an illegal device or the like.

  In order to achieve the above object, the slot machine with an illegal defense function of the present invention is a slot machine in which a predetermined number of medals are paid out by stopping a plurality of rotating reels in a predetermined symbol arrangement, and is used for internal lottery. A random number generating means for generating a random number for use, a random number converting means for converting the random number generated by the random number generating means based on a predetermined conversion method before the random number is used in the internal lottery, and a game situation When a predetermined condition is met, a conversion method changing unit that changes a predetermined conversion method to another conversion method is provided.

If the slot machine with an illegal defense function is configured in this way, after generating a random number for use in the internal lottery, the random number is converted according to a predetermined random number conversion method, and this conversion method is changed according to the game situation. It can be changed as appropriate.
For this reason, the winning position in the random number generation cycle can be prevented from being fixed, and even if a high-performance fraudulent device capable of capturing the random number generation cycle very accurately is used, the fraudulent act can be prevented. It becomes possible.

  Further, the slot machine with an illegal defense function of the present invention determines whether or not a predetermined tendency exists in the random number generated by the random number generation means and / or the random number converted by the random number conversion means, and the predetermined tendency If there is a fraud, there is fraud detection means for judging that there is a possibility of fraud and outputting a signal indicating that fraud may have occurred to the conversion scheme change means. When the changing unit inputs a signal indicating that fraud may have been performed from the fraud detection unit as a predetermined condition, the predetermined conversion method is changed to another conversion method.

If the slot machine with an unauthorized defense function is configured in this way, the random number conversion method can be used when the start lever is pressed in accordance with the random number generation cycle and there is a high possibility that an unauthorized device is being used. It becomes possible to change.
In this way, even if an unauthorized device is used, the winning position is changed thereafter, and the timing cannot be continuously adjusted to the winning position in the random number generation cycle. That is, the fraudster cannot aim at the winning position and cannot win the prize illegally.
Therefore, it is possible to appropriately prevent fraud using such an unauthorized device.

In the slot machine with an illegal defense function of the present invention, the conversion method changing means changes the predetermined conversion method to another conversion method when a predetermined winning combination is won as a predetermined condition as a result of the internal lottery. As a configuration.
If the slot machine with an illegal defense function is configured as described above, the random number conversion method can be changed in case a winning combination such as RB or BB is won.
As a result, it is possible to prevent an unauthorized person from illegally and continuously acquiring a jackpot or the like using an unauthorized device.

In the slot machine with an illegal defense function of the present invention, the conversion method changing means changes the predetermined conversion method when the difference between the number of inserted medals and the number of paid-outs exceeds a predetermined ratio with respect to the paid-out number. The configuration is changed to this conversion method.
If the slot machine with an illegal defense function is configured in this manner, the ratio of the difference ball to the number of paid-out medals, that is, the ratio of the difference between the number of paid-out medals and the number of inserted medals to the paid-out medal number exceeds a predetermined ratio. In addition, the random number conversion method can be changed just in case.
For this reason, even if no jackpot has occurred, it is assumed that a fraudulent device may be used if the winning rate is higher than planned, By changing the method, it is possible to eliminate fraud in the event of an emergency.

The slot machine with an illegal defense function of the present invention is configured such that the conversion method changing means changes the predetermined conversion method to another conversion method when a predetermined time has passed as a predetermined condition.
If the slot machine with an illegal defense function is configured in this way, the random number conversion method can be automatically changed every predetermined time, so that illegal acts on the slot machine can be appropriately prevented. .
Note that “when a predetermined time has elapsed” means that not only one time but also a plurality of times, for example, one minute, five minutes, ten minutes, and the like are set as predetermined conditions. it can. Further, the predetermined time is not limited to every fixed time, but can be set to every arbitrary time.

Further, in the slot machine with an illegal defense function of the present invention, the predetermined conversion method or other conversion method is the left-right inversion conversion of the binary value-displayed random number value array, or the binary-valued random number value inversion conversion of 0 and 1 In addition, the system may be any one of a system that performs a digit-decrease or carry-over conversion of a random value displayed in binary format, or a conversion conversion of a digit of a random value displayed in binary format.
If the slot machine with an illegal defense function is configured in this way, the above-described random number conversion method can be used, and by appropriately changing these, the basic parameters such as the random number size and It is possible to appropriately change the winning position in the random number generation cycle without changing the winning probability.

Further, the slot machine with an illegal defense function of the present invention is configured such that, in a predetermined conversion method or another conversion method, conversion is not performed for lower digits that do not affect the internal lottery in the random number value displayed in binary. is there.
If the slot machine with an illegal defense function is configured in this way, it is possible to eliminate the unnecessary conversion that does not change the winning probability when converting the random number, and to perform more efficient random number conversion.

According to the present invention, in the slot machine, a plurality of random number conversion methods are prepared, and when there is a possibility of fraud, or when a predetermined winning combination is made, the number of coins to be paid out and inserted as a game medium The winning position in the random number generation cycle of the internal lottery is fixed by changing the random number conversion method when the difference in the number of sheets exceeds a predetermined ratio with respect to the number of inserted sheets or when a predetermined time has elapsed. Can be prevented.
For this reason, even if it is possible to aim at a predetermined position in the random number generation cycle more precisely by improving the performance of a fraudulent device used in solenoid goto etc., the winning position itself does not have periodicity. Since it fluctuates, it is possible to prevent such illegal acts with extremely high accuracy.

Hereinafter, a preferred embodiment of a slot machine with an illegal defense function according to the present invention will be described with reference to the drawings.
It should be noted that the slot machine with an unauthorized defense function of the present invention shown in the following embodiments is operated by a computer controlled by a program. The program sends a command to each component of the computer and performs predetermined processing necessary for the operation of the slot machine, such as reel rotation and stop control processing, internal lottery processing, medal payout processing, fraud detection processing, Perform random number conversion method change processing, etc. Thus, each process and operation in the slot machine of the present invention can be realized by specific means in which the program and the computer cooperate.
The program is stored in advance in a recording medium such as a ROM and a RAM, and is executed by causing the computer to read the program from a recording medium mounted on the computer. For example, the program may be read by the computer via a communication line.
Further, the recording medium for storing the program can be constituted by, for example, a semiconductor memory, a magnetic disk, an optical disk, or any other recording means that can be read by any computer.

[Slot machine body]
First, the configuration of the main body of the slot machine with a fraud protection function according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic front view showing a main body of a slot machine according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing the internal structure of the slot machine main body according to the present embodiment.
As shown in these drawings, the slot machine of this embodiment rotates a plurality of reels 21 (see reels 21a, 21b, and 21c shown in FIG. 2) provided in the slot machine 1 as in the conventional slot machine. A spinning-type gaming machine that can win a winning medal is configured by stopping symbols (characters, numbers, patterns, etc.) attached to the reels 21a to 21c in a predetermined arrangement.
Specifically, the slot machine 1 is configured in a casing shape that houses necessary configurations and devices therein, and the front side is covered with a front panel 2 so as to be freely opened and closed.
As shown in FIGS. 1 and 2, the front panel 2 is a door body that is attached to the slot machine 1 so as to be openable and closable, and constitutes a front portion of the slot machine.

Three display windows 3 (3a, 3b, 3c) are provided in a substantially central portion of the front panel 2.
The display window 3 is a window for visual recognition of three reels (left) 21a, reel (middle) 21b, and reel (right) 21c (see FIG. 2) disposed in the slot machine 1, and is usually colorless and transparent. Or it consists of a colored transparent resin panel, etc., and among a plurality of symbols drawn around each of the three reels 21, a plurality of (usually three) symbols that are adjacent in the vertical direction can be visually recognized and identified. It is like that.
A winning line display is drawn on the display window 3 (five lines in FIG. 1), and the winning of the game is determined by a combination of symbols of the reels 21a to 21c stopped and arranged along the winning line display. It is like that.

As shown in FIG. 1, a start lever 4 and a stop button 5 are provided below the display window 3 of the front panel 2.
The start lever 4 is a game start means for starting the rotation of each of the three reels 21. When the start lever 4 is pressed by the player's operation, a start signal is output to the control means 10 described later (FIG. 3), the reels 21a to 21c inside the main body rotate all at once (or sequentially).

When a start signal is input by depressing the start lever 4, a random number is generated in a random number generation means 11a of the control means 10 described later (see FIG. 3), and the random number conversion means 11b (see FIG. 3) After the conversion of the random numbers, the lottery means 11c of the control means 10 (see FIG. 3) uses the converted random numbers to perform the internal lottery.
Further, after this random number generation, the fraud detection is performed to analyze whether or not the start lever 4 is illegally pressed and to output a signal when it is determined that there is a risk of fraud. The processing is executed in the fraud detection means 11c of the control means 10 (see FIG. 3).

The stop button 5 is a stop means for stopping the rotating reel 21 and includes three stop buttons (left) provided corresponding to the three reels (left) 21a, the reel (middle) 21b, and the reel (right) 21c. 5a, a stop button (middle) 5b, and a stop button (right) 5c. By pressing each stop button 5a, 5b, 5c at any timing of the player, a stop signal is output to the control means 10 (see FIG. 3), and the corresponding reels 21a, 21b, 21c are rotated. It is supposed to be stopped.
Therefore, when the player operates the start lever 4 and the stop button 5, the three reels 21a to 21c are rotated and stopped, and the symbols attached to the reels 21a to 21c are arranged in a predetermined winning arrangement. You can play slot machine games.

The reel 21 is formed of a cylindrical member having a plurality of (usually 21) patterns such as patterns and characters drawn on the outer periphery, as in a general slot machine, and is rotated in the vertical direction (vertical direction in the drawing). As shown in FIG. 2, the reel (left) 21a, the reel (middle) 21b, and the reel (right) 21c are arranged in a line in the horizontal direction (left-right direction in the drawing).
The symbols provided on each of the reels 21a to 21c are arranged at equal intervals for each reel. For example, characters such as “7” and “BAR”, a symbol indicating a slot machine character, fruit, etc. They are displayed in order, and usually 21 symbols are displayed on each reel.
Then, the symbols on the reels 21a to 21c are pressed along with the winning line display on the display window 3 described above by pressing the corresponding stop buttons 5a to 5c, for example, "7-7.7" or "BAR". Winning is determined by stopping at a predetermined combination such as “BAR / BAR”.

The three reels 21 a to 21 c are controlled to be driven and stopped by the control means 10 and the drum unit 20 provided in the slot machine 1. The drum unit 20 rotatably holds the three reels 21a to 21c, and a pulse (drive) signal from the control unit 11 of the control means 10 described later by pressing the start lever 4 and the stop buttons 5a to 5c. Is input (see FIG. 3), and the start, constant speed rotation and stop of the corresponding reels 21a to 21c are controlled.
The drum unit 20 controls the stop position of the reel 21 in accordance with the result of the internal lottery performed by the control means 10, regardless of the timing at which the player presses the stop button 5, that is, presses of the stop buttons 5 a to 5 c. Even if the timing is shifted, the reels 21 are controlled to stop so that the symbols of the corresponding reels 21a to 21c are in a specific arrangement within a certain range (usually within the range of four symbols).

For example, as a result of the internal lottery, if a predetermined winning content is won, regardless of the timing at which the player presses the stop buttons 5a to 5c, the symbols of the corresponding reels 21a to 21c are "7.7.7" or "BAR". The reels 21 are controlled to stop so as to have a predetermined arrangement such as “BAR / BAR”.
Thereby, the control means 10 performs an internal lottery with the start signal from the start lever 4 as a trigger, and the drum unit 20 is controlled by the control signal from the control means 10 so that the stop button 5 is pressed. Instead, each reel 21a, 21b, 21c is stopped at a stop position corresponding to the result of the internal lottery within a certain range.

As shown in FIG. 1, a medal slot 6 and a medal BET switch 7 are provided in the vicinity of the top of the start lever 4 and the stop button 5 of the front panel 2.
The medal slot 6 is a slot for receiving medals as a game medium used in the game, and the game can be performed by the number of medals inserted from the medal slot 6.
Here, a medal detection section (not shown) is provided on the inside of the main body of the medal insertion slot 6 and the number of inserted medals is counted, and a medal signal indicating the number of medals is output to the control means 10 inside the main body. (See FIG. 2).
Further, the number of medals inserted from the medal slot 6 is stored in the storage unit 12 in the control means 10 described later as the number of stored medals (see FIG. 3), and prior to the start of the game. A plurality of medals can be inserted in advance and stored and stored as stored medals.

The medal BET switch 7 is a medal insertion switch for inserting a medal to be used (multiplied) in the game from among the stored medals when the medal inserted from the medal insertion slot 6 has a stored medal.
When the medal BET switch 7 is pressed, a medal signal is output to the control means 10 (see FIG. 3), and the same number of medals are inserted into the game from the stored medals in the storage unit 12. Become.
Although not particularly illustrated in the present embodiment, the medal BET switch 7 is a MAX-BET switch that inserts the maximum number of medals that can be inserted into one game from a stored medal by one press, or one by one press. There are types such as a 1-BET switch for inserting a medal from a stored medal.

On the lower side of the slot machine 1, a winning medal payout port 8 and a speaker 9 are provided.
When the reels 21 stopped by pressing the stop button 5 are in a predetermined winning arrangement, the winning medal payout slot 8 is configured to pay out a number of winning medals according to the arrangement.
The speaker 9 generates various sounds such as a melody sound and a message sound for the player. For example, when the internal lottery is performed by the control means 10 and a predetermined bonus game is won, it is also preferable that a sound for notifying the inside is announced to the speaker 9.

[Control means]
Next, the control means 10 for controlling the slot machine according to the present embodiment configured as described above will be described with reference to FIG.
FIG. 3 is a block diagram showing an outline of the control means of the slot machine according to the present embodiment shown in FIG. As shown in the figure, the control means 10 of the present embodiment is realized by, for example, a program being executed by a microcomputer comprising a CPU, a RAM, a ROM, etc., and the processing of each part of the slot machine 1 as described above , Control the operation.
Specifically, as shown in FIG. 3, the control unit 10 of the present embodiment includes a control unit 11 and a storage unit 12, and the control unit 11 includes a random number generation unit 11 a, a random number conversion unit 11 b, a lottery unit 11 c, Each means includes fraud detection means 11d and conversion method change means 11e.

The control unit 11 inputs a medal signal from the medal insertion slot (medal detection unit) 6 and a medal signal from the medal BET switch 7, and uses the number of medals inserted from the medal insertion slot 6 and the medal BET switch 7. While confirming the number of inserted medals, the number of stored medals stored in the storage unit 12 is decreased based on the medal signal from the medal BET switch 7. As a result, the number of medals used (multiplied) for each game is determined.
Further, the control unit 11 in the control means 10 stores the number of medals inserted into the game in the storage unit 12 as the inserted number. The number of inserted medals is preferably accumulated and stored for each predetermined time and timing or game situation.

  Further, the control unit 11 inputs a start signal from the start lever 4 and a stop signal from the stop buttons 5a to 5c, thereby outputting a pulse (driving) signal as a control signal for the reel 21 to the drum unit 20 and 21a-21c is rotated and stopped. Accordingly, in the drum unit 20, the reels 21a to 21c are rotated by the start signal, and the corresponding reels 21a to 21c are stopped by the stop signal input by pressing the stop buttons 5a to 5c.

Further, the control unit 11 recognizes the stop symbols of the reels 21a to 21c from the marker signal input from the drum unit 20, and determines whether or not the stop symbols are in a predetermined winning arrangement. If the result of the determination is that the predetermined winning arrangement is made, a medal payout process corresponding to the type of winning is performed.
Further, in the medal payout process, the control unit 11 stores the medal payout number in the storage unit 12. The number of medals to be paid out is preferably accumulated and stored for each predetermined time, timing, or game situation.

  The random number generation means 11a of the control unit 11 generates a random number for use in internal lottery. The random number generation means 11a has an IC counter generally called a random number generation device, and when the slot machine is turned on, the number within a predetermined range is sequentially counted. When the start lever 4 is pressed, the random number generator 11a outputs the number counted at that timing as a random number.

The random number conversion means 11b of the control unit 11 converts the random number generated by the random number generation means 11a. The converted random number is used for internal lottery. As the random number conversion method, two or more methods are prepared and selected by the conversion method changing means 11e described below.
In the present embodiment, for example, left-right inversion conversion of an array of random value values displayed in binary notation, inversion conversion of 0 and 1 of random value values displayed in binary notation, carry-down conversion or carry-up conversion of random value values displayed in binary notation, It is possible to use, for example, replacement conversion of the digit of the random number value displayed in binary.

4 to 11 show examples of such a random number conversion method. FIG. 4 is an example in which left-right reversal conversion of an array of random number values displayed in binary format is performed, FIG. 5 is an example in which reverse conversion of 0 and 1 is performed on random number values displayed in binary format, and FIGS. An example in which a digit value or a carry conversion of a random value displayed in binary format is performed, and FIGS. 10 and 11 illustrate an example in which a conversion of the digit of a random value value displayed in binary format is performed.
In these examples, there is no change in the upper limit value of random numbers and the number of appearances of each numerical value before and after conversion, and the winning probability in the internal lottery is not changed. Also, when using other conversion methods, the conversion is performed without changing the winning probability of each winning combination in the internal lottery.

In these examples, the random number generation range is set to 0 to 31 (decimal system) in order to simplify the description. Then, an asterisk is added to the numerical value of the winning position, indicating which position the winning position has moved by the conversion.
In this way, by using a plurality of conversion methods and frequently changing the conversion method to be used under a predetermined condition, the generation of random numbers for internal lottery eliminates the periodicity of the winning position in the random number generation cycle. It becomes possible.
Such a conversion method is more preferable as the number of types increases, because the winning position in the random number generation cycle can be changed in various ways.

Furthermore, in this random number conversion, it is also preferable to omit the last few digits. For example, if the generation range of random numbers is about 0 to 16000 (decimal system) and the winning position of the big winning combination with the lowest probability of winning is in the range of 4901 to 4932 (decimal system), the numerical values are switched within this range. However, it will be won and it is meaningless. Therefore, in this case, the change in the decimal digits of 32 or less and the binary digit of 2 to the fifth power or less is substantially unrelated to the loss of hit.
Therefore, it is also preferable to change the random number to be changed only to the sixth power of 2 or more in this case, omit unnecessary operations, and improve processing efficiency.

In the lottery unit 11c of the control unit 11, an internal lottery is performed using the random number converted by the random number conversion unit 11b.
In the lottery means 11c, as in the case of a conventional slot machine, an internal lottery is obtained by acquiring lottery result information indicating the winning content corresponding to the random number using a lottery table preset and stored in the storage unit 12. Is done. In addition, the lottery means 11c outputs the internal lottery result information to the conversion method changing means 11e.

Further, when the winning content in each game is determined based on the result of the internal lottery, the stop position of the reel 21 is controlled according to the winning content. That is, when a winning content is won, regardless of the timing at which the player presses the stop button 5, stop control is performed so that the symbols attached to the reels 21 are arranged in accordance with the winning content within a certain range. It will be.
At this time, the control unit 11 outputs to the drum unit 20 a pulse (driving) signal for stopping and controlling the reel 21 in a predetermined winning arrangement according to the lottery result of the lottery means 11c. 21 stop position is controlled. Thus, the reels 21a to 21c are stopped so that the symbols are in a predetermined winning arrangement corresponding to the winning contents within a certain range, regardless of the timing when the stop buttons 5a to 5c are pressed.

  In addition, as for the contents of a prize drawn and determined by the lottery means 11c, there are generally several types such as “losing”, “replay”, “small role”, “regular bonus”, “big bonus”, etc. Also in this embodiment, the same winning contents are determined by lottery. However, the types and specific contents of the winnings are set according to the type and type of the slot machine, and there is no particular limitation for implementing the slot machine according to the present embodiment. .

The fraud detection unit 11d of the control unit 11 causes the storage unit 12 to store the random number generated by the random number generation unit 11a or the random number converted by the random number conversion unit 11b. And the tendency is analyzed about the random number before conversion, the random number after conversion, or both, and it is judged whether a predetermined tendency is seen.
For example, in FIG. 4, when the winning of “00101” (binary system) after conversion is aimed, a large number of random numbers close to the value of “10100” (binary system) before conversion are generated by the random number generation means 11a. Conceivable.
It is also conceivable to aim at the winning position by finely adjusting the timing of pressing the start lever 4 in the random number generation cycle using an unauthorized device.

Thus, whether a random number within a certain range and that whether the consecutive occurrences number, by the value of the random number is analyzed whether the change One not a little abuse is occurring Can be determined. That is, the absolute value of the difference between the random number output by the random number generation means 11a and the random number output by the random number generation means 11a in the previous game is the maximum value of the random number counted by the random number generation means 11a. Check if it is less than a certain percentage, and if it is less than a certain percentage, check if it has continued for a certain number of times, and if it has continued for a certain number of times, the possibility of fraud It can be judged that there is.

For example, when the difference between the random number generated in a certain game and the random number generated in the previous game is 1/10 or less of the random number generation cycle, it occurs 6 times or more consecutively In addition, it can be determined that there is a possibility of fraud. Of course, it is not necessary to limit to this condition, and an appropriate value can be used according to the operation or the like.
In the analysis by the fraud detection means 11d, various statistical methods can be used.
For example, it is possible to detect that the random numbers used for the internal lottery are not randomly generated by fraud and appear with a specific tendency by the least square method, Marquardt method, Newton, or the like.

In the present embodiment, an explanation is given assuming an illegal act of illegally adjusting the random number generation timing by pressing the start lever 4 using an unauthorized device, but the start lever 4 is directly pressed. Rather than adjusting the random number generation timing, the illegal operation of adjusting the random number generation timing by using other means to illegally give the slot machine a signal indicating that the start lever 4 has been pressed. It can be applied similarly.
When the fraud detection unit 11d determines that there is a possibility of fraud, the fraud detection unit 11d outputs a signal indicating this to the conversion method change unit 11e.

The conversion method change means 11e changes the random number conversion method to another conversion method when the gaming situation meets a predetermined condition.
The predetermined condition may be, for example, a case where a signal indicating that fraud may have been performed by the fraud detection unit 11d is sent from the fraud detection unit 11d.
Moreover, it can be set as the case where the lottery result information which shows that the winning combination of RB, BB, etc. was won from the lottery means 11c.

Further, the conversion method changing means 11e calculates, for each game, a difference obtained by subtracting the inserted number from the number of paid out medals stored in the storage unit 12, and this value exceeds a predetermined ratio with respect to the inserted number. can do.
For example, it can be set as the case where predetermined time, such as every minute, passed.
Then, the conversion method changing unit 11e randomly changes the random number conversion method used by the random number conversion unit 11b when such a predetermined condition is met, and notifies the random number conversion unit 11b of the conversion method. To do.

Further, the change of the random number conversion method by the conversion method changing means 11e is more preferably performed in all the above cases.
However, if only the passage of the predetermined time is a predetermined condition, depending on how the predetermined time is determined, periodicity may occur at the timing of winning the internal lottery. It is preferable to use a combination of the other conditions described above.

Next, the change of the random number conversion method will be described in detail using a specific example.
As a random number conversion method, for example, in a slot machine where the method shown in FIG. 4 is used, a fraudulent person repeatedly performs a fine adjustment of the pressing timing of the start lever 4 using a high-performance fraudulent device. Thus, it is assumed that the period can be adjusted in the vicinity of “00101” after conversion (binary system, the winning position of BB. The random number before conversion is “10100”).
In this case, the conventional slot machine should be able to hit BB almost continuously thereafter, but in the slot machine of this embodiment, when the conversion method changing means 11e wins BB, This conversion method is converted into, for example, the method shown in FIG.
Therefore, the random number “10100” before conversion is lost, and the fraudster can adjust the timing of pressing the start lever 4 at the winning position of BB in the random number generation cycle of the internal lottery using a high-performance fraudulent device. Nevertheless, since the position is immediately changed, the unauthorized device cannot exert its effect at all.

Even if a bonus game such as BB or RB is not applied, if a small role is continuously applied, it is determined by the fraud detection means 11d that an illegal act has been performed, and the conversion method changing means 11e Since the conversion method will be changed, the use of unauthorized devices will not make sense.
Furthermore, even if the winning position in the internal lottery generation cycle is acquired over time, if the random number conversion method is changed in a short time such as 1 minute, the winning position will be changed. Will not be able to obtain any fraudulent profits by fraudulent devices.
As described above, according to the slot machine of the present embodiment, no matter how accurate the fraudulent device is used to aim at the winning position in the random number generation cycle, the winning position is immediately changed. It is possible to prevent the action very effectively.

The storage unit 12 is a storage unit that stores and accumulates programs and various data necessary for control of each part of the slot machine and game control in the control unit 10.
For example, the storage unit 12 stores a lottery table used for internal lottery in the lottery means 11c.
Further, the storage unit 12 stores the number of stored medals inserted from the medal insertion slot 6 (the number of stored medals), and the stored stored medal number is reduced by the medal signal of the medal BET switch 7. .
In this embodiment, the random number generated by the random number generation unit 11a and the random number converted by the random number conversion unit 11b are sequentially stored in the storage unit 12, and analyzed by the fraud detection unit 11d.
The storage unit 12 stores the number of medals to be paid out and the number of inserted medals, and is used to determine whether or not to change the random number conversion method.

The configuration of the slot machine with an illegal defense function according to the present embodiment described above is substantially the same as the configuration and functions of the existing slot machine except for the above-described parts, and the gaming method, gaming system, etc. It is almost the same.
Therefore, detailed description of the same parts as those of the existing machine is omitted.

[Game operation]
Next, the operation of the slot machine according to this embodiment configured as described above will be described with reference to FIG. FIG. 12 is a flowchart showing an outline of the operation of the slot machine according to the present embodiment.
As shown in the figure, first, the game is started when the player inserts a medal into the medal slot 6 (step 1201 shown in FIG. 12).
Here, the medals to be inserted are normally assigned to one, two or three medals corresponding to the winning line on the display window 3, and when four or more medals are inserted, four medals are inserted. The above medals are stored in the storage unit 12 of the control means 10 as stored medals. Therefore, the stored medals are stored by the medal BET switch 7 so that they can be inserted in the second and subsequent games.

  After the medal is inserted, when the start lever 4 is pressed (step 1202), the three reels 21 start to rotate at the same time, and at the same time, the random number generator 11a in the controller 11 of the controller 10 generates a random number. After the generated random number is converted by the random number conversion unit 11b, the lottery unit 11c performs lottery for the inside using the converted random number (step 1203).

Next, in order to determine whether or not to change the random number conversion method used in the internal lottery, the change condition is analyzed (step 1204).
As this change condition, various things can be used as described above. For example, whether or not there is a possibility of fraud, the result of the internal lottery, whether it has become a predetermined winning combination such as RB or BB It can be determined whether the difference obtained by subtracting the inserted number from the number of paid-out medals exceeds a predetermined ratio with respect to the number of paid-out coins, whether a predetermined time has elapsed, or the like.

  If the condition for changing the random number conversion method is met (Yes in step 1205), for example, if it is determined that there is a possibility of fraud, a predetermined winning combination is determined as a result of the internal lottery. The conversion method changing means 11e changes the random number conversion method when the difference obtained by subtracting the number of inserted medals from the payout number of medals exceeds a predetermined ratio with respect to the number of payouts, or when a predetermined time has elapsed. Is changed (step 1206). The random number conversion method can be changed by randomly selecting one from a plurality of conversion methods as exemplified in FIGS.

This change in the random number conversion method has no effect on the game itself, and thereafter the normal gaming state is executed. In the game after the next time, random number conversion is performed using the changed random number conversion method and used in the internal lottery of the game.
Further, even when the condition for changing the random number conversion method is not met (No in step 1205), the normal gaming state is executed.
That is, the player presses the stop buttons 5a to 5c, the reels 21a to 21c corresponding to the stop buttons 5a to 5c are stopped, and a normal game operation is executed.
It is also possible to change the execution position, for example, after the operation of step 1204 to step 1206 is performed after the stop buttons 5a to 5c are pressed or after the stop control of the reels 21a to 21c is executed. .

As described above, according to the slot machine with an illegal defense function according to the present embodiment, a plurality of random number conversion methods are prepared, and the random number conversion method can be changed when the gaming state meets a predetermined condition. Therefore, the winning position in the random number generation cycle of the internal lottery can be prevented from being fixed.
Therefore, even if an attempt is made to use a fraudulent device to aim for a specific winning position in the random number generation cycle, the winning position is immediately changed, and thus such fraud can be almost completely eliminated. .

As described above, the slot machine with an unauthorized defense function of the present invention has been described with reference to a preferred embodiment. However, the slot machine with an unauthorized defense function according to the present invention is not limited to the embodiment described above, and the present invention is not limited thereto. It goes without saying that various modifications can be made within the range described above.
For example, in the embodiment described above, the case where the random number generating unit 11a, the random number converting unit 11b, and the lottery unit 11c are used in the configuration of the control unit 11 has been described. However, the random number generating unit 11a and the random number converting unit 11b are described. Of course, it is also possible to include the above function in the lottery means 11c and configure it as one means. Further, it is possible to add a change such that the control means 10 itself is divided into a plurality of parts, and it is a matter of course that the detailed design matters of the slot machine with an illegal defense function of the present invention can be changed as appropriate.

It is a schematic front view which shows the slot machine with a fraud protection function which concerns on one Embodiment of this invention. It is a schematic perspective view which shows the internal structure of the slot machine with a fraud protection function which concerns on one Embodiment of this invention. It is a block diagram which shows the control means of the slot machine with a fraud protection function which concerns on one Embodiment of this invention. It is a figure which shows an example (left-right reversal conversion of the arrangement | sequence of the value of the random number displayed by the binary system) in the random number conversion system in the slot machine with a fraud protection function which concerns on one Embodiment of this invention. It is a figure which shows an example (inversion conversion of 0 and 1 of the value of the random number displayed by the binary system) of the random number conversion system in the slot machine with an illegal defense function which concerns on one Embodiment of this invention. FIG. 16 is a diagram showing an example of a random number conversion method in the slot machine with a fraud protection function according to an embodiment of the present invention (decrease of a value of a random number displayed in binary notation, or carry conversion: one carry / four carry). . FIG. 15 is a diagram showing an example of a random number conversion method in the slot machine with a fraud protection function according to an embodiment of the present invention (decrease of the value of the random number displayed in binary notation or carry conversion: double carry / three carry down). . FIG. 16 is a diagram showing an example of a random number conversion method in the slot machine with a fraud prevention function according to the embodiment of the present invention (decrease of the value of the random number displayed in binary notation or carry conversion: three-digit carry / two-digit decrement). . FIG. 16 is a diagram showing an example of a random number conversion method in the slot machine with a fraud prevention function according to the embodiment of the present invention (decimal value carry or binary conversion displayed in binary notation or carry conversion: four carry / one carry). . It is a figure which shows an example of the conversion method of the random number in the slot machine with a fraud prevention function which concerns on one Embodiment of this invention (replacement conversion of the digit of the value of the random number displayed in the binary system: replacement of the upper one digit and the lower one digit). It is a figure which shows an example of the conversion method of the random number in the slot machine with a fraud prevention function which concerns on one Embodiment of this invention (replacement conversion of the digit of the value of the random number displayed in the binary system: replacement of the first two digits and the next two digits) . It is a flowchart which shows operation | movement of the slot machine with a fraud protection function which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slot machine body 2 Front panel 3 Display window 4 Start lever 5 (5a, 5b, 5c) Stop button 6 Medal insertion slot 7 Medal BET switch 8 Winning medal payout slot 9 Speaker 10 Control means 11 Control part 11a Random number generation means 11b Random number Conversion means 11c Lottery means 11d Fraud detection means 11e Conversion method change means 12 Storage section 20 Drum unit 21 (21a, 21b, 21c) Reel

Claims (2)

A slot machine in which a predetermined number of medals are paid out by stopping a plurality of rotating reels in a predetermined symbol arrangement,
Random number generating means for generating random numbers for use in internal lottery;
Random number conversion means for converting the random number generated by the random number generation means based on a predetermined conversion method before the random number is used in the internal lottery;
Conversion method changing means for changing the predetermined conversion method to another conversion method when the gaming situation meets a predetermined condition;
The absolute value of the difference between the random number output by the random number generation means and the random number output by the random number generation means in the previous game is a predetermined value relative to the maximum random number counted by the random number generation means. Check if it is less than or equal to the percentage, and if it is less than or equal to the predetermined percentage, check if it has continued for a predetermined number of times. And fraud detection means for outputting a signal indicating that fraud may have been performed to the conversion method change means,
When the conversion method changing means inputs, as the predetermined condition, a signal indicating that fraud may have been performed from the fraud detection means, the predetermined conversion method is changed to another conversion method. A slot machine with an illegal defense feature. A slot machine in which a predetermined number of medals are paid out by stopping a plurality of rotating reels in a predetermined symbol arrangement,
Random number generating means for generating random numbers for use in internal lottery;
Random number conversion means for converting the random number generated by the random number generation means based on a predetermined conversion method before the random number is used in the internal lottery;
Conversion method changing means for changing the predetermined conversion method to another conversion method when the gaming situation meets a predetermined condition;
The absolute value of the difference between the random number output by the random number generation means and the random number output by the random number generation means in the previous game is a predetermined value relative to the maximum random number counted by the random number generation means. Check if it is less than or equal to the percentage, and if it is less than or equal to the predetermined percentage, check if it has continued for a predetermined number of times. And fraud detection means for outputting a signal indicating that fraud may have been performed to the conversion method change means,
When the conversion method changing means inputs a signal indicating that fraud may have been performed from the fraud detection means as the predetermined condition, or a predetermined bonus game is won as a result of the internal lottery In this case, the slot machine with an illegal defense function is characterized in that the predetermined conversion method is changed to another conversion method.

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