JP2006296736A - Slot machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably eliminate illegal games by dispersing winning positions in an internal lottery and preventing fixing of the winning positions. <P>SOLUTION: This slot machine is provided with: a first random number generation means 11a for generating a first random number for the internal lottery; a second random number generation means 11b for generating a second random number in each game asynchronously with the first random number; a means 11c for deciding the number of rotation bits based on the second random number; a random number conversion means 11d for carrying out bit rotation of the number shown by the number of rotation bits to the first random number; and a lottery means 11e for carrying out the internal lottery using the number after the bit rotation. <P>COPYRIGHT: (C)2007,JPO&INPIT

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. In particular, a number within a predetermined range is sequentially counted and used as a random number (first random number) as a random number (first random number). A second random number is generated for each game asynchronously with the random number, the number of rotation bits is determined based on the second random number, the first random number is bit-rotated based on the determined number of rotation bits, and this bit rotation The present invention relates to a slot machine that performs internal lottery using later random numbers.

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 to rotate, and the rotating reels stop by pressing multiple (usually 3) stop buttons corresponding to each reel at any timing. A gaming machine in which a predetermined number of medals are paid out according to the arrangement of symbols.
In such a slot machine, normally, in order to increase the fun of the game, a plurality of reels are automatically controlled with a certain probability so that the symbols attached to each reel are arranged in a predetermined arrangement on the winning line. The winning control called “inner hit” is performed to stop.

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 include, for example, “regular bonus (RB)” and “big bonus (BB)” bonus games that allow a large amount of medals to be paid out, “small role” with a small amount of medals, and medal input There are several types, such as “replay” that can be played without a game, and “losing” that does not give out medals, and a predetermined number of winning medals are paid out according to the contents 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 a subsequent game. Will be paid out almost certainly, 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 about 9,000 to about 14,000. 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, there is a hardware that reverses the bit arrangement of random numbers by hardware so that the time for winning an internal lottery can be distributed within a random number cycle (see, for example, Patent Document 1).
Further, there is a technique that prevents a winning time zone having a certain width from occurring by distributing random numbers using a predetermined calculation formula (see, for example, Patent Document 2).
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, and the winning position in the internal lottery can be changed without changing the basic parameters such as the random number size and the winning probability. The purpose is to provide a slot machine that not only disperses the winning position but also prevents the winning position from being fixed and eliminates the act of illegally acquiring the winning using a fraudulent device or the like. .

  In order to achieve this object, the slot machine of the present invention stops a plurality of reels that start rotating by a start operation so that the symbols on each reel are in a predetermined winning arrangement, so that a game according to a winning symbol is achieved. A slot machine from which a medium is paid out, a first random number generating means for generating a first random number for use in internal lottery, and a second random number generating means for generating a second random number for determining the number of rotation bits Rotation bit number determination means for determining the number of rotation bits based on the second random number, random number conversion means for performing the number of bit rotations indicated by the number of rotation bits for the first random number, and the number after bit rotation And a lottery means for performing an internal lottery.

If the slot machine has such a configuration, the number of rotation bits is determined based on the second random number generated by the second random number generation means, so that the winning position in the internal lottery can be changed each time. For this reason, the winning position in the internal lottery is generated irregularly without being fixed. Therefore, it is possible to eliminate an illegal game using the periodic generation of the winning position.
Furthermore, bit rotation is performed on the first random number. Here, the range of numbers obtained as the first random number (for example, 0 to 16383) is the same as the range of numbers obtained after bit rotation. In other words, performing bit rotation is equivalent to rearranging the numbers included in the range within the range. Thereby, the winning positions in the internal lottery can be distributed. In addition, the bit rotation is performed on the value generated as the first random number. For this reason, the probability of occurrence of each value of the number obtained after bit rotation is the same as the probability of occurrence of each value of the number obtained as the first random number. Therefore, in the slot machine capable of realizing the present invention, the size of the random number and the winning probability, which are basic parameters, are not changed.

The slot machine of the present invention is configured such that the second random number generation means generates a second random number for each game.
If the slot machine has such a configuration, a different number of rotation bits can be determined for each game based on the second random number generated for each game by the second random number generation means. For this reason, the winning position in the internal lottery can be changed for each game. Therefore, since the winning position in the internal lottery is irregularly generated at different positions for each game, it is possible to eliminate illegal games that are illegally acquired by detecting the periodicity of the winning positions.

In the slot machine of the present invention, the second random number generation means generates the second random number asynchronously with the first random number generation means.
If the slot machine has such a configuration, the second random number can be generated without regularity and without relation to the first random number. For this reason, for example, even if a fraudulent manipulator is operated so that a predetermined value of the first random number is regularly generated (for example, solenoid goto), the number of rotation bits is randomly determined regardless of the number. The Thereby, the winning position in the internal lottery can be generated irregularly, and therefore, illegal games that exploit the periodicity of the winning position can be prevented.

  Further, in the slot machine of the present invention, there are a plurality of numbers that can be determined as the number of rotation bits, and the rotation bit number determination means is selected from all or a part of the plurality of numbers that can be determined as the number of rotation bits. The number of rotation bits used for bit rotation in the random number conversion means is determined.

  If the slot machine has such a configuration, it is more effective than the others in order to eliminate fraudulent games from a plurality of numbers (for example, 0 to 13 (= M)) that can be determined as the number of rotation bits. A plurality of numbers (for example, 7 to 12) are selected, and the rotation bit number determining means can determine one number from the selected numbers and use it for the bit rotation process. Therefore, it is possible to more effectively eliminate fraudulent games using the winning generation cycle.

  As described above, according to the present invention, bit rotation is performed on the first random number, and the second random number for determining the rotation bit number is randomly generated for each game. The winning positions in can be distributed, and the distribution pattern can be different for each game. Therefore, it is possible to eliminate an illegal game that abuses the generation cycle of the winning position.

Hereinafter, a preferred embodiment of a slot machine according to the present invention will be described with reference to the drawings.
Note that the slot machine 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 such as reel rotation start processing, reel stop control processing, random number generation processing, rotation bit number determination processing, bit rotation processing for random numbers, internal hits The lottery process is performed. Thus, each process and operation in the slot machine according to the present invention is 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 or RAM, and is executed by causing the computer to read the program from a recording medium mounted on the computer. However, the program may be read by the computer via a communication line, for example. . 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 readable by a computer.

[Slot machine body]
First, the configuration of the main body of the slot machine according to the 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 door 2 so as to be opened and closed.
As shown in FIGS. 1 and 2, the front door 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 1.

Three display windows 3 (3a, 3b, 3c) are provided in a substantially central portion of the front door 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.

A start lever 4 and a stop button 5 are provided below the display window 3 of the front door 2 as shown in FIG.
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 first random number is generated (see FIG. 3) in a first random number generating unit 11a of the control unit 10 described later (here, a second random number is generated). The second random number can be generated by the means 11b), and after the random number is converted by the random number converting means 11d (see FIG. 3), the lottery of the control means 10 is performed using the converted random number. In the means 11e (see FIG. 3), a lottery per inside is performed. The processing in these control means 10 will be described in detail in [Control means] described later.

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. When these stop buttons 5a, 5b, 5c are pressed 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 and characters and the like drawn on the outer periphery, as in a general slot machine, and includes three reels (left) 21a and a reel (middle). As shown in FIG. 2, 21 b and a reel (right) 21 c are arranged in a row in the horizontal direction (left-right direction in the drawing) and rotatably arranged in the vertical direction (up-down direction in the drawing).
The symbols drawn 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 insertion slot 6 and a medal BET switch 7 (MAX insertion button 7a and insertion button 7b) are provided in the vicinity of the top of the start lever 4 and stop button 5 of the front door 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 (6) is provided on the inside of the main body of the medal insertion slot 6, 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 means 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 (betting) 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 means 12. Become.
Although not particularly illustrated in the present embodiment, the medal BET switch 7 is a MAX insertion button 7a for inserting the maximum number of medals that can be inserted into one game from a stored medallion by one pressing, or one pressing by one. There are types such as an insertion button 7b 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.

[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 FIGS. The control means 10 of the present embodiment is realized, for example, by executing a program with a microcomputer including a CPU, a RAM, a ROM, and the like, and controls the processing and operation of each unit of the slot machine 1 as described above.
Specifically, the control means 10 of this embodiment includes a control unit 11 and a storage means 12 as shown in FIG.

  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. The number of medals betted is confirmed, and the number of stored medals stored in the storage unit 12 is decreased based on the medal signal from the medal BET switch 7. Thereby, the number of medals used (betting) for each game is determined.

  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.

  As shown in FIG. 3, the control unit 11 includes a first random number generation unit 11a, a second random number generation unit 11b, a rotation bit number determination unit 11c, a random number conversion unit 11d, and a lottery unit 11e. ing.

  The first random number generation means 11a generates a random number (first random number, random number A) for use in the internal lottery. The first random number generation means 11a is configured to have an IC counter generally called a random number generator. When the power of the slot machine 1 is turned on, the random number generation device sequentially and repeatedly counts numbers within a predetermined range. When the start lever 4 is pressed, the number counted at that timing is output as a random number A.

The second random number generation means 11b generates a random number (second random number, random number B) for determining the number of rotation bits. The generated random number B is used for the rotation bit number determining process in the rotation bit number determining means 11c.
The second random number generation means 11b generates a random number B for each game. Thereby, the generation timing of the winning position in the internal lottery can be varied for each game. Accordingly, it is possible to eliminate an illegal game in which the winning position occurrence cycle is determined and the winning is illegally performed.
Further, the second random number generator 11b generates a random number B asynchronously with the generation of the random number A in the first random number generator 11a. As a result, even if the generation timing of the random number A in the first random number generation means 11a can be controlled by a special device, the random number B is generated regardless of the random number A and the number of rotation bits is determined at random. Therefore, it is possible to make it difficult to detect the timing of occurrence of hits, thereby eliminating fraudulent acts using the periodic occurrence of hits.

An example of the configuration of the second random number generator 11b is as follows.
For example, two IC counters called random number generators are provided, one of which is an IC counter (first IC counter) for the first random number generator 11a, and the other is an IC counter (second IC) for the second random number generator 11b. Counter). Similar to the first IC counter, the second IC counter repeatedly counts a number within a predetermined range when the power of the slot machine 1 is turned on. The number counted when the start lever 4 is pressed is output as a random number B.

Another configuration example of the second random number generator 11b is as follows.
For example, a first IC counter constituting the first random number generation means 11a and a storage means 12 for storing a number (random number A ′) obtained by performing bit rotation on the random number A generated by the first IC counter. There is something to have.
In the previous game, the first IC counter generates a random number A, the random number conversion means 11d performs bit rotation on the random number A, and the storage means 12 stores the random number A ′ subjected to the bit rotation. deep. In this game, the random number A ′ stored in the storage means 12 is taken out and used as a random number B for determining the number of rotation bits.

The rotation bit number determination means 11c determines the rotation bit number based on the random number B output from the second random number generation means 11b.
Here, the relationship between the random number B and the number of rotation bits is shown in FIG.
For example, the number that can be acquired as the random number B is an integer value from 0 to M, and the number that can be determined as the number of rotation bits is 1 to i. In this case, there are i bit rotation patterns (see FIGS. 6 (1) to (14)). Details of the bit rotation pattern will be described later.

The random number B is divided into sections as shown in FIG.
For example, as shown in the figure, (0 to M / i-1) is assigned to section 1, (M / i to 2M / i-1) is set to section 2, (2M / i to 3M / i is set to section 3). -1)..., ((I-1) M / i to M) can be divided and assigned to the section i.
In each section, it is desirable that the random number B is equally divided. However, when M / i does not become an integer, it may be rounded to an appropriate integer. This is because the winning frequency does not change by bit rotation. However, it is necessary that the intervals are continuous.

  Then, the rotation bit number determining means 11c selects and determines the rotation bit number (or one of i different bit rotation patterns) corresponding to the acquired random number B with reference to the table shown in FIG. To do.

A specific example will be described.
For example, the random number B is obtained as an integer value from 0 to 16383 (= M). The number that can be determined as the number of rotation bits is 1 to 14 (14 bit rotation patterns).
The random number B is divided into 14 sections (= i). That is, the random number B is assigned as (0 to 1170) in the section 1, (1171 to 2340) in the section 2, (2341 to 3510) in the section 3,..., (15214 to 16383) in the section 14. Shall.

In section 1, the number of rotation bits “1”, in section 2, the number of rotation bits “2”, in section 3, the number of rotation bits “3”, and in section 14, the number of rotation bits “14”. , Respectively.
As for the bit rotation pattern, FIG. 6 (2) for section 1, FIG. 6 (3) for section 2, FIG. 6 (4) for section 3,. ) And FIG. 6 (1) can be assigned to the sections 14, respectively.

  Here, if the random number B generated by the second random number generation means 11b is, for example, “1854”, this is within the range of section 2 (1171-1340). Therefore, the rotation bit number determining means 11c selects and determines the rotation bit number “2” (FIG. 6 (3) for the bit rotation pattern) based on the random number B (= 1854).

  In the table shown in FIG. 4, all of the numbers that can be determined as the number of rotation bits (specifically, all of 1 to 14) are assigned to each section and can be determined. However, the number determined by the rotation bit number determining means 11c is not limited to the number that can be determined as the number of rotation bits, and a part of the number can also be the target. That is, when all the bit rotation patterns (14 patterns in this example) are unnecessary, the number of patterns can be selected by appropriately selecting i.

  For example, six numbers (for example, 7 to 12) are selected from the numbers (1 to 14) that can be determined as the number of rotation bits, and only the selected number is determined by the rotation bit number determination unit 11c. Possible (that is, (8) to (13) are selected from the 14 bit rotation patterns shown in FIGS. 6 (1) to (14), and only these numbers are determined by the rotation bit number determining means 11c. it can).

Here, the selected six numbers (for example, 7 to 12) can be assigned to any of 14 sections. For example, “7” is assigned to the sections 1 and 2, “8” is assigned to the sections 3 and 4, “11” is assigned to the sections 9 to 11, and “12” is assigned to the sections 12 to 14. Can do.
Alternatively, the number of sections may be six (or any number) and the selected six numbers may be assigned to each. In this case, the random number B is divided into six (or any number thereof) and assigned to each section.

  Further, the number determined by the rotation bit number determining means 11c can be 1 to 13. Thereby, “14” in which the distribution state of the winning position is the same before and after the bit rotation can be eliminated.

The random number conversion means 11d performs the bit rotation of the number indicated by the number of rotation bits determined by the rotation bit number determination means 11c to the random number A generated by the first random number generation means 11a, thereby converting the random number A. . The converted random number A ′ is used for internal lottery in the lottery means 11e.
The random number conversion means 11d can perform bit rotation using hardware such as a shift register, for example. It is also possible to perform bit rotation using software.

The bit rotation process is a process of rotating (circulating) shifting each bit of the random number A by the number of rotation bits.
A specific example will be described.
As shown in FIG. 5, for example, it is assumed that the acquired random number A is “1234” (hexadecimal number). When this is converted into a binary number, “01001000110100” is obtained. Note that the random number A expressed in binary numbers is expressed in 14 digits.

When the number of rotation bits is “1”, the random number A ′ after the bit rotation processing is “10010001101000” (when bit rotation is performed in the left direction (carrying direction) (left shift)).
Similarly, when the number of rotation bits is “2”, the random number A ′ is “00100011010001”, “3”, the random number A ′ is “010001110100010”,..., “6”, and the random number A ′ is “ "00110100010010". When the number of rotation bits is “14”, since the random number A is 14 digits, the random number A ′ is “01001000110100”, which is the same as the random number A.

Then, the number (binary number) after bit rotation is converted into a hexadecimal number. Thereby, the random number A ′ subjected to the bit rotation process is obtained.
For example, when the number of rotation bits is “1”, the random number A ′ is “2468” (hexadecimal number). Similarly, “08D1” (hexadecimal) for “2”, “11A2” (hexadecimal) for “3”,..., “0D12” (hexadecimal) for “6”, .., “131” (hexadecimal number) for “13” and “1234” (hexadecimal number) for “14”.

  In this embodiment, the bit rotation shift direction is the left direction (upward direction), but the bit rotation shift direction is not limited to the left direction, and may be the right direction (digit reduction direction). it can. In this case, the same effect as in the left direction can be obtained. Note that which shift direction is selected is arbitrary.

By the way, when the random number A is subjected to bit rotation processing, the winning position (winning generation timing) in the internal lottery changes according to the number of rotation bits. FIG. 6 (1) to (14) show the distribution state (bit rotation pattern) of the winning position constituted by the random number A ′ after the bit rotation processing.
The figure shows the bit rotation pattern for each rotation bit number when the random number A is expressed by binary 14 bits. When the rotation bit number is “0”, FIG. When the number of rotation bits is “1” in FIG. (2), when the number of rotation bits is “2” in FIG. (3),... (14) is when the number of rotation bits is “13” Respectively.

As shown in FIGS. (1) to (14), when the random number A is 14 bits, the bit rotation pattern is 14 patterns. That is, the same number of bit rotation patterns as the number of bits of the random number A are obtained.
Here, FIG. 1A and FIG. 2B will be described as representative examples of bit rotation.

First, (1) will be described. (1) in the figure shows the case where the bit rotation process is performed when the number of rotation bits is “0” (or “14”) (the number of rotation bits is “0” (or “14”), or the bit rotation process. It is a figure which shows the bit rotation pattern in the case of not performing.
FIG. 1A is the same as the distribution of winning positions in a conventional slot machine. Therefore, in the following description, FIG. 1A will be described as a distribution state of winning positions in a conventional slot machine.
Furthermore, FIG. 7 shows an explanatory diagram of FIG. FIG. 7 is an explanatory view showing a partially enlarged view of FIG.

  As shown in FIG. 7, FIG. 6 (1) shows all integers (for example, 0 to 16383) generated as random numbers A arranged in a matrix. Here, as shown in FIG. 7, in FIG. 6 (1), the left end of the uppermost row is set to “0”, and the numbers incremented one by one in the right direction are sequentially arranged up to a maximum of 64 in one row. The next number (“64”) is placed at the left end of the next row, and the number incremented by 1 is sequentially placed in the right direction, and this is repeated. Then, the last number “16383” is positioned at the right end of the bottom row.

Here, assuming that the number to be won for “big hit” is, for example, from 10,000 to 13000, the number to be won is attached with a pattern (a line made up of dots) as shown in FIG. 6 (1) and FIG. As shown
As described above, in the conventional slot machine, the number of winning combinations is concentrated in a certain range, and that range is hit in every game. For this reason, periodicity is generated in the timing of the winning, and illegal games using this can be made possible.

Next, FIG. 6B will be described. FIG. 2B is a diagram showing a bit rotation pattern when the number of rotation bits is “1”.
That is, (2) in FIG. 2 performs bit rotation with the number of rotation bits set to “1” for each number (random number A) constituting the diagram shown in FIG. A ′) is arranged.

FIG. 8 shows an explanatory diagram of FIG. FIG. 8 is an explanatory diagram showing a partially enlarged view of FIG.
As shown in FIG. 8, in FIG. 6B, the number “0” obtained by bit rotation processing of “0” is arranged at the left end of the top row. The number “2” obtained by bit rotation processing of “1” is arranged on the right side. Further, the number “4” obtained by bit rotation processing of “2” is arranged on the right side. As described above, FIG. 6B is a diagram in which bit rotation is performed with the number of rotation bits set to “1” for each value constituting FIG.

  Here, comparing FIG. 6 (1) with FIG. 2 (2), the winning position of “big hit” is concentrated in one place in FIG. 1 (1), whereas in FIG. 6 (2). It can be seen that there are two parts. In this way, even if the number generated as the random number A is the same, the winning position can be changed by performing bit rotation.

Similarly, in FIGS. 6 (3) to (14), bit rotation is performed using a predetermined number of rotation bits for each number in the matrix diagram shown in FIG. 6 (1), and the resulting numbers are arranged. It has become.
As shown in FIGS. 6 (1) to (14), when the number of rotation bits is different, the bit rotation pattern is also different. Moreover, no two are the same. For this reason, if the number of rotation bits is changed for each game, an internal lottery is performed with a different bit rotation pattern for each game, and the winning position in the internal lottery is changed for each game. be able to. Therefore, since the hit occurrence timing is irregular, it is possible to eliminate an illegal game that exploits the regularity of the occurrence timing.

  As can be seen from the above description, in the diagrams shown in FIGS. 6 (2) to (14), the numbers (specifically, 0 to 16383) constituting the diagram shown in FIG. 6 (1) are arranged. The order has been changed. For this reason, even if bit rotation as in the present embodiment is performed, the size of the random number and the winning probability, which are basic parameters, are not changed.

The lottery means 11e performs an internal lottery using the random number A ′ converted from the random number A by the random number conversion means 11d.
In the lottery means 11e, as in the case of the conventional slot machine, by using the lottery table preset and stored in the storage means 12, the lottery result information indicating the winning contents corresponding to the random number A ′ is acquired. An internal lottery will be held.

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 (drive) signal for stopping and controlling the reels 21 in a predetermined winning arrangement according to the lottery result of the lottery means 11e. 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, the winning contents to be drawn and determined by the lottery means 11e are generally divided into 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. .

  Further, 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.

The storage means 12 is means for storing and accumulating programs and various data necessary for control of each part of the slot machine and game control in the control means 10.
For example, the storage unit 12 stores a lottery table used for internal lottery in the lottery unit 11e.
The storage means 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. .
Further, the storage means 12 stores the table shown in FIG. As a result, the rotation bit number determining means 11c refers to the table of the same figure stored in the storage means 12 when determining the rotation bit number.

The configuration of the slot machine 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 game method, the game system, and the like are also substantially 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. This figure 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 10 shown in FIG. 9).
Here, the inserted medals are usually assigned to one bet, two bets or three bets corresponding to the pay line on the display window 3, and four or more medals are inserted when four or more medals are inserted. The above medals are stored in the storage unit 12 of the control unit 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, the start lever 4 is pressed (step 11), and the three reels 21 start to rotate at the same time. As a result, the first random number generator 11a of the controller 11 of the controller 10 generates a random number. A is generated, and the random number B is generated in the second random number generation means 11b (steps 12 and 13).
Next, the rotation bit number determining means 11c determines the rotation bit number based on the random number B (step 14).
In the random number conversion means 11d, the number of bit rotations indicated by the number of rotation bits is performed on the random number A and converted to the random number A ′ (conversion process (bit rotation process), step 15).

Using the random number A ′, the lottery means 11e performs a lottery per inside (lottery process, step 16).
As a result of the lottery, when a bonus game or the like is won, a winning process such as paying out a predetermined amount of medals or entering a bonus game is executed on the condition of winning (Steps 17 and 18).
Thereafter, the continuation or end of the game is selected according to the player's judgment (step 19).

As described above, according to the slot machine according to the present embodiment, a second random number that is asynchronous with the first random number is generated for each game, and each game is based on the second random number. Since the number of rotation bits is determined, and the number indicated by the number of rotation bits is the bit rotation performed on the first random number, the bit rotation pattern can be changed every game.
For this reason, the winning position in the internal lottery will occur irregularly in every game, so it is possible to extremely effectively prevent fraudulent acts that exploit the regularity of the timing of occurrence of the winning position. Yes.

The preferred embodiment of the slot machine of the present invention has been described above. However, the slot machine according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. Needless to say.
For example, in the above-described embodiment, when the first random number generation unit 11a, the second random number generation unit 11b, the rotation bit number determination unit 11c, the random number conversion unit 11d, and the lottery unit 11e are used in the configuration of the control unit 11. However, it is of course possible to include functions such as the first random number generation means 11a and the random number conversion means 11d in the lottery means 11e so as to be configured as one means. Further, it is possible to add a change in which the control means 10 itself is divided into a plurality of parts, and it is a matter of course that detailed design matters of the slot machine of the present invention can be changed as appropriate.

In the above-described embodiment, the number of binary bits of the first random number is 14. However, the number of bits is not limited to 14 bits, and can be any number of bits. In this case, it goes without saying that the number of bit rotation patterns is the same as the number of bits.
Furthermore, in the above-described embodiment, the first random number and the second random number are obtained as integer values from 0 to 16383, but are not limited to being obtained as integer values from 0 to 16383. , Any number can be obtained. In addition, the maximum value of the first random number and the maximum value of the second random number can be the same or different.

  In the above-described embodiment, the winning contents to be won by the internal lottery of the slot machine include a small role, a replay (replay), a big bonus (BB), a regular bonus (RB), a loss, and the like. However, there is no particular limitation as long as a high probability state of the bonus game can be realized by changing the lottery probability for each betting number of the game medium and changing the bet number in the gaming state. Therefore, for example, a challenge time (CT), a single challenge time (SCT), a single bonus (SB), and the like can be included.

  In addition, in the slot machine of the above-described embodiment, the case where the game medium to be used is a medal (coin) is shown, but the game medium that can be used in the slot machine according to the present invention is not limited to a medal, for example, a pachinko ball The same game balls as can be used as game media. A slot machine that can be played using such a game ball is also called a pachilot or the like, and can be applied as the slot machine of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for a slot machine (cylinder-type game machine) in which a game is performed mainly using medals (coins) as game media, and is particularly suitable for a slot machine that performs internal lottery for each game. Can be used.

It is a front view which shows the front structure of the slot machine of this invention. It is a schematic perspective view which shows the internal structure of the slot machine of this invention. FIG. 4 is a block diagram showing a control unit and its peripheral configuration of the slot machine of the present invention. It is a figure which shows the relationship between a 2nd random number (random number B) and the number of rotation bits (bit rotation pattern). It is a figure which shows the specific example at the time of carrying out the bit rotation of the random number A. It is a figure which shows the distribution state (bit rotation pattern) of the winning position for every rotation bit number. It is a figure which shows a bit rotation pattern in case a rotation bit number is "0" (or "14"). It is a figure which shows a bit rotation pattern in case a rotation bit number is "1". 4 is a flowchart showing the operation of the slot machine of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slot machine body 2 Front door 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 First random number generation means 11b Second random number generation means 11c Rotation bit number determination means 11d Random number conversion means 11e Lottery means 12 Storage means 20 Drum unit 21 (21a, 21b, 21c) Reel

Claims (4)

A slot machine in which a plurality of reels that start rotating by a start operation are stopped so that symbols on each reel are in a predetermined winning arrangement, and game media corresponding to winning symbols are paid out,
First random number generating means for generating a first random number for use in the internal lottery;
Second random number generating means for generating a second random number for determining the number of rotation bits;
Rotation bit number determining means for determining the rotation bit number based on the second random number;
Random number conversion means for performing bit rotation of the number indicated by the rotation bit number with respect to the first random number;
A slot machine comprising: lottery means for performing an internal lottery using the number after the bit rotation. The slot machine according to claim 1, wherein the second random number generating means generates the second random number for each game. The slot machine according to claim 1 or 2, wherein the second random number generation means generates the second random number asynchronously with the first random number generation means. There are a plurality of numbers that can be determined as the number of rotation bits,
The rotation bit number determining means determines the number of rotation bits used for the bit rotation in the random number conversion means from all or a part of a plurality of numbers that can be determined as the rotation bit number. The slot machine according to any one of claims 1 to 3.

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