JP2006116234A - Game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a fraud by sharpshooting of a random number by generating the random number using a pulse width modulation (PWM). <P>SOLUTION: The pulses with different duty ratios are periodically sampled by the number of bits and defined as the random number. The ON/OFF periods (time width) are changed by defining one time of being a high voltage as "High" and a time of being a low voltage as "Low" using the PWM. This constitution makes it difficult for a player to perform the sharpshooting of a big winning period so as to prevent the fraud by the sharpshooting of the random number. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gaming machine such as a slot machine that performs random number lottery for each game.

In recent years, pachislot games using slot machines have become popular. In the slot machine, three rows of reels are arranged on the front surface of the main body, and a predetermined number of coins can be obtained when the symbols corresponding to the winning combination are aligned on the effective line.
By the way, in the slot machine described above, the reel starts rotating at the timing when the rotary lever is operated, and at the same time, an internal lottery is performed by acquiring a random number (for example, see Patent Document 1).

JP 2004-136001 A

  The random number is generated by counting a fixed-period clock generated by the oscillator, and is acquired by extracting one of them at the timing when the player hits the lever or the rotation of the reel is started. As shown in FIG. 10, in the conventional method of generating a random number by inputting a sine wave to a clock terminal of a counter and incrementing it as shown in FIG. 10, the period is constant, so a specific random number is aimed. That is not so difficult. In particular, a CPU that performs internal lottery processing in a slot machine can only have a relatively low performance in terms of capacity, and therefore, jackpot random numbers are concentrated in one place (an example of a lottery table is shown in FIG. 12). There is a very high risk of random number shooting. Recently, fraudulent acts that aim at random numbers by using special equipment have become a problem.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a gaming machine that prevents illegal acts caused by random number shooting by generating random numbers using pulse width modulation. .

  In order to solve the above-described problems, the present invention is a gaming machine that generates a random number by periodically incrementing a counter and performs a lottery drawing based on the random number, and cycles a pulse having a different duty ratio by the number of bits. And random number generation means for sampling and generating the random numbers.

  In the present invention, the random number generation means may include a comparator that receives a nonlinear pulse having a different period and compares the voltages.

  In the present invention, the random number generation means serially extracts the comparison result bit by bit in the sampling.

  According to the present invention, it is difficult to aim at the big hit period because the ON / OFF period (time width) is changed by periodically sampling pulses with different duty ratios by the number of bits to obtain random values. become. For this reason, it is possible to prevent fraud by aiming at random numbers.

Hereinafter, as an embodiment of the gaming machine of the present invention, a slot machine installed in a playground or the like will be described with reference to FIGS.
1 is a plan view showing an external structure of the slot machine 100, FIG. 2 is a plan view showing an internal structure of the slot machine 100, and FIG. 3 is a configuration of a control system provided in the slot machine 100. It is a block diagram showing.

In FIG. 1, the slot machine 100 includes a front door 101 that faces a player, and a case 102 (described later) to which the front door 101 is attached so as to be opened and closed.
The front door 101 includes an upper panel portion 103, a middle panel portion 104, and a lower panel portion 105, and is formed by a metal frame (not shown) and a front panel formed of hard plastic as a whole. It has a mechanically strong structure.

  The upper panel portion 103 is provided with an effect lamp 103a called an upper lamp, sound emitting portions 103b and 103c to which speakers are attached, and an effect display device 103d formed of a liquid crystal display or the like. The middle panel unit 104 is provided with a spinning reel device 200 having a plurality (three in this embodiment) of the spinning reels R1, R2, and R3, and for the side of the spinning reel device 200. Lamps 104a and 104b are provided.

  In front of the reel reels R1, R2, and R3, a substantially rectangular transmission window WD formed of a transparent hard plastic plate is provided, thereby protecting the reel reel device 200 from the outside and a player. Can see the reels R1, R2, and R3 through the transmission window WD. Further, an operation unit 104c for a player to operate is provided at the lower end of the middle panel unit 104. The operation unit 104c includes a medal insertion unit MD for inserting game medals and a medal per game. Bet buttons B1, B2, and B3 for presenting numbers, a start lever ST for instructing the start of one game, and three for stopping the spinning reels R1, R2, and R3 individually. Stop buttons SP1, SP2 and SP3 are provided.

  An image (not shown) related to the game contents of the slot machine 100 is drawn on the lower panel unit 105, and a discharge port 105a and a tray 105b for paying out a medal acquired by the player, and a speaker are provided. An attached sound emitting unit 105c is provided.

Next, with reference to FIG. 2, the rear surface structure of the front door 101 and the internal structure of the housing 102 will be outlined. FIG. 2 shows a state in which the front door 101 is unlocked and opened from the housing 102.
In the figure, speakers SR and SL constituting the above-described sound emitting units 103b and 103c are provided on the upper rear surface of the front door 101, and an effect display device 103d is provided between the speakers SR and SL, and an effect display device. A sub-control board 300 is attached to the back side of 103d.

Below the effect display device 103 d and the sub-control board 300, a substantially rectangular frame body 104 d in which the transmission window WD and the panel surface of the middle panel unit 104 are formed is attached.
Below the frame body 104d, a distribution mechanism G0 that distributes an input inserted from the medal insertion unit MD according to whether it is a regular game medal or a foreign object, and a game medal distributed by the distribution mechanism G0 are housed. A guide member G1 for guiding the hopper device HP provided on the body 102 side, a guide member G2 for guiding and discharging the foreign matter distributed by the sorting mechanism G0 to the discharge port 105a, and the hopper device HP. A guide member G3 for guiding and outputting the payout medal to the discharge port 105a is provided, and a speaker SW is attached in the vicinity of the discharge port 105a so as to correspond to the sound emitting unit 105c.

Further, a long central display substrate 400 is attached to a region between the frame body 104d and the distribution mechanism G0, and a setting button CS and a number 0 are attached to one end on the back side of the central display substrate 400. To 6 is provided with a setting display element CT formed of light emitting diodes for performing segment display.
In the housing 102, there are a main power supply device PWU, an auxiliary storage portion SHP for storing game medals overflowing from the hopper device HP, and a spinning reel R1, R2, R3 facing the transmission window WD. In addition to the provided spinning reel device 200, a power supply device substrate 500 is provided on the side of the main power supply device PWU, a spinning device substrate 600 is provided on the upper end of the spinning reel device 200, and a main substrate 700 is provided above the spinning reel device 200. An external concentration terminal board 800 as an external concentration terminal device is attached to one end of the inner wall of the housing 102.

  Here, the main substrate 700, the sub-control substrate 300, the spinning device substrate 600, the central display substrate 400, the power supply device substrate 500, and the external concentrated terminal substrate 800 are all insulative having a conductive wiring pattern formed thereon. Formed as a so-called electric circuit board in which electronic components such as integrated circuit devices (ICs), transistors, resistors, capacitors, etc. are mounted on a resin substrate, and are connected to each other. Each of the substrates 800 has a unit structure stored individually in a hard plastic storage case.

Further, the configuration of the control system will be described with reference to the block diagram of FIG. 3. The main board 700 is a semiconductor in which a system program for managing the entire operation of the slot machine 100 and an execution program for the slot machine game are stored in advance. A memory and a CPU that executes these programs are mounted, and the input port and output port of the CPU and the other substrates 300, 600, 400, 500, and 800 are wired and connected by a wiring cable.
Further, the production speakers SR, SL, SW, the production lamps 103a, 104a, 104b, and the production display device 103d are connected to the sub board 300 via the wiring cable and supplied from the microprocessor in the main board 700. In accordance with the effect control signal, the electric circuit provided on the sub-board 300 drives the effect speakers SR, SL, SW, the effect lamps 103a, 104a, 104b, and the effect display device 103d. Produce for hearing.

  The spinning device substrate 600 is connected to the spinning reel device 200 having the spinning reels R1, R2, and R3 that are rotationally driven by an electric motor, and a reel control signal supplied from a CPU in the main substrate 700. Thus, by controlling the electric motor described above, the rotation, braking and stopping of the spinning reels R1, R2, and R3 are controlled.

  The central display board 400 is wired to the distribution mechanism G0, the bet buttons B1, B2, B3, the start lever ST, the stop buttons SP1, SP2, SP3, the setting display element CT, and the setting button CS. The medal detection signals output from the mechanism G0 and the on / off signals output from the bet buttons B1, B2, B3, the start lever ST, and the stop buttons SP1, SP2, SP3 are transferred to the microprocessor in the main board 700. Based on the segment display signal supplied from the microprocessor, numbers from 0 to 6 are displayed on the setting display element CT.

A reset switch RS, a setting button BO, a power switch BQ, and a hopper device HP are wired to the power board 500, and on / off signals output from the setting button BO and the power switch BQ are transferred to the CPU in the main board 700. To do. Further, the power supply board 500 is formed with a power distribution circuit that distributes various generated power supply voltages to the hopper device HP and other parts, and power supply necessary for the operation of the slot machine 100 is supplied from the power distribution circuit. Yes.
The external concentrated terminal board 800 has a plurality of input terminals P1 to P6 capable of inputting in parallel the signals S1 to S6 output from the CPU in the main board 700, and the signals S1 to S6 are managed electronic devices. In addition to a plurality of output terminals Q1 to Q6 that can be transferred in parallel to the hall computer side, an input terminal P7 for inputting a signal IN supplied from the hall computer side and an output terminal Q7 for transferring to the CPU And a signal transfer circuit (not shown) for transferring the signals S1 to S6 and IN only in one direction.

  That is, by connecting the output terminals Q1 to Q6 and the input terminal P1 and the input / output interface provided in the hall computer with a wiring cable such as a flat cable, the main board 700 is moved to the hall computer side. The signals S1 to S6 can be transferred, and the signal IN can be transferred from the hall computer to the main board 700 side.

The signal S1 is a “game medal insertion signal” that is output every time one game medal is inserted from the medal insertion unit MD to the hopper device HP, and the signal S2 is a game medal from the hopper device HP to the discharge port 105a. A “game medal payout signal”, which is output every time one is paid out, a signal S3 is a “signal per continuous object actuating device”, which is output when winning a special combination called a regular bonus (RB), a signal S4. Is a “peripheral action increasing device per signal” output when winning a special role larger than the regular bonus (RB) called the big bonus (BB), and the signal S5 is a so-called output rate setting operation. This is a “setting operation signal” indicating that the operation has been performed.
The signal IN supplied from the hall computer side is an “external stop release signal” for commanding so-called stop release to the microcomputer in the main board 700.

  Next, the main configuration of the random number generation means for preventing the aiming of random numbers, which is the main object of the present invention, and the operating principle thereof will be described with reference to FIG.

FIG. 4 is a diagram showing an embodiment of the present invention. Here, random numbers are generated using PWM (Pulse Width Modulation).
As is well known, two signals with different periods, here a sine wave, are input to the comparator (operation amplifier) 71, and the comparison result is “High” for the high voltage and “Low” for the low time. In this case, the output of the comparator 71 is supplied to the clock input terminal of the counter 72.

  FIG. 5 shows the timing chart. In FIG. 5, (a) is a sine wave with a different period supplied to the input terminals 1 and 2 of the comparator 71, and (b) shows the output of the comparator 71. As is apparent from the timing chart of FIG. 5, as the output of the comparator 71 (out data), the ON / OFF cycle changes with the high time of one voltage being the “High” level and the low time being the “Low” level. is doing.

  FIG. 6 specifically shows an example of random number acquisition in the case of sine wave comparison. In FIG. 6B, the output of the comparator 71 is shown. When sampling is performed, random numbers can be acquired by serially extracting one bit at a time. Here, “151” (decimal) is output as the random value. FIG. 6A shows an example in which the period in the conventional example is constant for comparison and reference.

Specifically, the solution of Sin (At) = Sin (Bt) [A and B are not the same speed constant] is
t = (2n−1) π × 2 / (A + B) [t =..., −2, −1, 0, 1.2.
t = 2nπ × 2 / (A + B) [t =..., −2, −1, 0, 1.2.
Since t depends only on n, the interval between the rising edges of the output pulses remains constant even when the comparison is made by the comparator 71. Therefore, it is impossible to easily identify the jackpot period by determining the sampling delay time for each sampling from soft random numbers or other hard random numbers and acquiring the data at that time for each pit.

Here, processing from random number acquisition to internal lottery will be briefly described with reference to the flowchart shown in FIG. That is, when the ST lever is turned on (S111), the CPU 40 performs an internal lottery according to the random number acquired and latched one by one from the increment counter, and checks whether there is a winning or not (S112). Then, the presence / absence of the winning is checked, and in the case of winning, the condition device is operated (S114). FIG. 11 shows an example of a lottery table. Here, the lottery table is composed of 16 bits, and random numbers of detachment, replay, winning, RB, and BB are assigned between 0 and 65535. Thus, the random numbers are concentrated in the second half due to the processing performance of the CPU 40.
As described above, the present invention periodically samples pulses having different duty ratios by the number of bits to obtain a random value, and this allows a specific random number to be obtained using an instrument that obtains a random number at a constant period. Even if aiming, it is only possible to obtain a different random number each time, so that illegal acts by aiming at random numbers can be prevented.

FIG. 7 is a waveform diagram cited for explaining another embodiment of the present invention. Here, linear and non-linear function comparison is performed.
In the example shown in FIG. 7, since the comparison is between a triangular wave and a sine wave, the interval between rising edges slightly changes as shown by a thick arrow in the figure. If this signal is input to the counter, the increment timing changes, so that the effect is obtained regardless of the serial method shown in FIG.

  FIG. 8 shows an embodiment of random number generation means when a triangular wave is used. Here, three-stage comparators 73, 74, and 75 are shown, and the triangular wave generated by the comparators 74 and 75 is supplied to one input terminal of the comparator 73. The comparison with the sine wave supplied to the other input terminal is performed.

FIG. 9B shows the comparison result by the comparator 73 and the timing when it is turned ON in the form of a spectrum. For reference, a conventional example is shown in FIG. As is apparent from the figure, according to the embodiment of the present invention, the rising period is slightly shifted, so that the timing of the big hit is not constant and at regular intervals, and therefore a safe lottery system can be obtained even by a conventional method. In this case, the current parallel method can be used instead of the serial method. For this reason, according to the present embodiment, the random number generation means can be configured with only the increment counter without the CPU.
According to the embodiment shown here, the shorter the period of the triangular wave and the longer the period of the sine wave, the better.

  As described above, according to the present invention, it is possible to change the ON / OFF cycle (time width) by periodically sampling the pulses having different duty ratios by the number of bits to obtain a random number value, thereby aiming at the jackpot cycle. It makes it difficult. For this reason, it is possible to prevent fraud by aiming at random numbers.

It is a figure showing the external structure of the slot machine concerning the embodiment of the present invention. It is a figure showing the internal structure of the slot machine concerning the embodiment of the present invention. FIG. 3 is a diagram showing an internal configuration of a control system for a slot machine according to an embodiment of the present invention. It is the figure quoted in order to demonstrate the structure of the random number generation means concerning embodiment of this invention. FIG. 5 is an operation timing chart of the embodiment shown in FIG. 4. FIG. 5 is a timing chart showing the operation of the embodiment shown in FIG. 4 in comparison with a conventional example. It is the figure quoted in order to demonstrate basic operation | movement of the other example of the random number generation means concerning embodiment of this invention. It is the figure quoted in order to demonstrate the other structure of the random number generation means concerning embodiment of this invention. It is the figure quoted in order to demonstrate operation | movement of embodiment shown in FIG. It is the figure quoted in order to demonstrate the random number update period in a prior art example. It is a figure which shows the flow of the process from random number acquisition to internal lottery. It is a figure which shows an example of a random number lottery table.

Explanation of symbols

  71, 73, 74, 75 ... comparator, 72 ... increment counter

Claims (3)

A gaming machine that generates a random number by periodically incrementing a counter and performs a role lottery based on the random number,
Random number generating means for periodically sampling pulses having different duty ratios by the number of bits to obtain the random number,
A gaming machine comprising: The random number generation means includes
The gaming machine according to claim 1, further comprising a comparator that inputs non-linear pulses having different periods and compares the voltages. The random number generation means includes
3. The gaming machine according to claim 1, wherein in the sampling, the comparison result is serially extracted bit by bit.

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