JP2002165918A - Slot machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slot machine capable of increasing impact to a player without being affected by illumination or the like in a hall and of sufficiently exhibiting a presentation effect, in announcing a lottery result. SOLUTION: This slot machine starts rotation of pattern row rotating members 22a, 22b, and 22c with an operation of a starting switch, simultaneously determines right or wrong of inner winning by the lottery, and, when the inner winning is provided, controls predetermined winning patterns to line up on a pattern display window in stopping the rotation of respective pattern row rotating members with an operation of a stopping switch. The inside of a easing is provided with a hiding means 29 that hides a part of at least one pattern row rotating member seen through the pattern display window and is switchable between a hiding state and a non-hiding state. The hiding means displays at a predetermined probability a fact that the result of the lottery is the inner winning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slot machine as a gaming machine, and more particularly to a slot machine for notifying an internal prize.

[0002]

2. Description of the Related Art Generally, a slot machine is provided with a start switch, three stop switches, a symbol display window, and the like on the front of a housing, and has a plurality of symbols drawn on the outer peripheral surface in the housing. The symbol row reels (also simply referred to as reels) are arranged in a horizontal row so that three symbols can be seen through the symbol display window, and when the player operates the start switch for each game, each symbol row reel is set. When all of the symbol row reels are stopped by operating the three stop switches simultaneously, the presence or absence of a prize is determined depending on whether or not a predetermined combination of symbols is aligned on the symbol display window.

In recent computer-controlled slot machines, in order for the winning symbols to appear on average, the rotation of each symbol row reel is started by operating a start switch, and at the same time, a winning or a winning is determined by lottery. Confirm,
Even if the operation timing of the stop switch operated by the player when the internal prize is slightly shifted is within the allowable range, the rotation stop of the symbol row reel is controlled so that the symbols corresponding to the internal prize are aligned. So-called pull-in control is performed. In particular, when the internal winning is a special winning such as a big bonus, a bonus flag is set, and the pull-in control is repeated for each game until the player arranges the bonus symbol on the symbol display window.

In this type of slot machine, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-135307, a player can easily understand the lottery result (that is, whether or not an internal prize including an internal special prize and the type thereof). In order to be able to understand, it is known that a player operates a start switch to rotate a symbol row reel, and notifies a lottery result by physical notifying means until the rotation speed reaches a certain speed. ing. When notifying the lottery result, a so-called gasp notification may be performed even in the case where no internal prize has been won in order to enhance the playability. Further, in the above-mentioned publication, as a physical notification means, a light such as a backlight for illuminating a symbol of a symbol row reel displayed on a symbol display window from the rear side when the symbol row reel is stopped is turned on, off or blinking. There are disclosed a visual informing means for causing the sound, a human voice and the like to be generated from a sound source, and a tactile informing means such as a vibration and a projecting motion of a solid.

[0005]

However, of the above-mentioned conventional physical informing means, the visual informing means and the auditory informing means are difficult to recognize because the information is erased by the illumination and noise in the hall. However, the fact is that the player cannot feel much impact on the notification. Further, the tactile notification means has a drawback that the effect cannot be sufficiently exerted because the mode such as vibration is limited.

[0006] The present invention has been made in view of the above points, and it is an object of the present invention to pay particular attention to the fact that it is normal for a player during a game to look at a symbol row reel through a symbol display window. Then, by giving a change to the symbol row rotating member such as the symbol row reel by another visual means instead of lighting and notifying the lottery result, the player can be affected by the lighting etc. in the hall without being affected by the lighting etc. The aim is to provide a slot machine that can increase the impact and sufficiently exert the effect.

[0007]

According to a first aspect of the present invention, at least a start switch, a stop switch, and a symbol display window are provided on a front surface of a housing as a slot machine. A plurality of symbol row rotating members (reels, endless belts, etc.) each having a plurality of symbols drawn on the outer peripheral surface are arranged in a horizontal row so as to be partially visible through the symbol display window. At the same time as starting the rotation of each symbol row rotating member, the winning or non-winning of the internal prize is determined by lottery, and when the internal prize is won, a predetermined winning symbol is displayed when the rotation of each symbol row rotating member is stopped by operating the stop switch. It is assumed that control is performed so as to be aligned on the display window. In the housing, concealing means that can be changed between a concealed state and a non-concealed state for concealing a part of at least one symbol row rotating member visible through the symbol display window is arranged, and the concealing means performs the lottery. It is configured to display that the result is an internal winning with a predetermined probability. In this configuration, a part of at least one symbol row rotating member visible through the symbol display window is concealed by the concealing means, so that a lottery result is displayed with a predetermined probability, and the lottery result is affected by lighting and noise in the hall. Therefore, the player can be recognized at a glance and the impact on the player can be increased.

According to a second aspect of the present invention, there is provided a slot machine according to the first aspect, wherein the concealing means is not operated during a game in which a stop switch corresponding to the concealed symbol row rotating member is not operated, for example, a symbol row rotating member. The state is changed to the concealed state after the rotation is started until the rotation speed reaches a certain speed or after the stop switch is operated. In this configuration, the concealing means is changed to the concealed state when the stop switch is not operated, and is in the non-concealed state when the stop switch is operated, and does not hinder the visual recognition of the symbol row rotating member. Therefore, the player can perform the pressing to stop the symbol row rotating member at the specific symbol without a sense of incongruity.

According to a third aspect of the present invention, there is provided a specific form of the concealing means in the slot machine according to the first or second aspect. That is, the concealing means includes an annular concealing member arranged on the outer periphery of at least one symbol row rotating member, and driving means for rotating the concealing member, and at least one of the concealing members has a circumferential direction. An opening having a length substantially the same as the height of the symbol display window is provided, and when the concealing means is not concealed, the inner symbol row rotating member can be seen through the opening and the symbol display window. In this configuration, the concealing member arranged on the outer periphery of the symbol row rotating member is rotated to a position where the opening thereof faces the symbol display window, so that the inner symbol row rotating member has the opening of the concealing reel and the symbol. It can be easily changed to a non-concealed state that is visible to the player through the display window, and the design or playability in the concealed state can be enhanced by using a relatively large portion other than the opening of the concealing member.

[0010] The invention according to claim 4 is for enhancing the playability, in which a plurality of symbols are drawn at positions other than the opening of the concealing member, and when the concealing means is in the concealed state, some of these symbols are partially concealed. It is configured such that the symbols seen through the symbol display window and the symbols seen through the symbol display window are stochastically different according to the type of the internal winning. In this configuration, when the concealing member is rotated and changed to the concealing state of concealing the inner symbol row rotating member, a part of the symbol drawn on the concealing member is visible through the symbol display window, and the symbol is an internal prize. Since the probability varies depending on the type (for example, the internal special prize and other internal prizes), the player can easily estimate the type of the internal prize from this symbol.

The invention according to claim 5 provides another specific mode of the concealing means in the slot machine according to claim 1 or 2, which is different from the invention according to claim 3. That is, the concealing means conceals a part of the symbol row rotating member by bringing the strip-shaped mask member arranged on the outer periphery of at least one symbol row rotating member and the mask member close to the symbol display window. And a drive unit for rotating between the concealing position and a non-concealing position in which the symbol row rotating member is separated from the symbol display window to bring the symbol row rotating member into a non-concealing state. In this configuration, the mask member on the outer periphery of the symbol row rotating member is brought close to the symbol display window by the driving means, and the concealing position for concealing a part of the symbol row rotating member is separated from the symbol displaying window. By rotating between the concealed state and the non-concealed position, it is possible to reliably switch between the concealed state and the non-concealed state.

The inventions according to claims 6 and 7 are both intended to enhance the playability by utilizing the mask member of the concealing means in the slot machine according to claim 5. That is, in the invention according to claim 6, a plurality of symbols are drawn on the mask member, and in the concealed state of the concealing means, some of these symbols can be seen through the symbol display window, and the symbol display window according to the type of the internal prize. The symbols seen through are configured so as to be stochastically different. With this configuration, when the mask member is rotated and changed to the concealed state of concealing the inner symbol row rotating member, a part of the symbol drawn on the mask member is seen through the symbol display window, and the symbol is an internal prize. (For example, an internal special prize and other internal prizes), the player can easily estimate the type of the internal prize from this symbol.

According to a seventh aspect of the present invention, in the mask member, an opening whose length in the longitudinal direction is smaller than the height of the symbol display window is provided, and the symbol being rotated through the opening and the symbol display window is provided. The corresponding stop switch is operated while the row rotating member is visible. In this configuration, apart from the normal game in which the mask member is in the non-concealed state and the stop switch can be operated without hindering the visual recognition of the symbol row rotating member, the symbol is limited to a limited area through the opening of the mask member. A game in which the corresponding stop switch is operated while the row rotating member is visible can be realized.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 shows an appearance of a slot machine A according to a first embodiment of the present invention. The front door 1 constituting the gaming surface of the slot machine A is provided with a reel device 20 (FIG. 2).
) And a housing (not shown) for accommodating devices such as a medal payout machine so as to be openable and closable.

An upper lamp 2 and a pair of left and right speakers 3, 3 are provided at the upper part of the front door 1, and a reel window 4 as a symbol display window and five effective windows are provided at the center of the front door 1. Indicator lamps 5a, 5b, 5c, 5d,
5e, credit number display section 6, hit number display section 7,
There are provided a winning number display section 8, a medal slot 9, a start switch 10, three stop switches 11a, 11b, 11c, a bet switch 12, a clearing switch 13, and the like. In addition, a medal payout port 14 is provided below the front door 1.
And a medal tray 15.

In the housing, a reel device 20 as shown in FIG. The reel device 20 includes three symbol row reels 22a, 22b, 22c as three circular symbol row rotating members each of which is independently driven to rotate by a drive motor 21, and an outer peripheral surface of each of the symbol row reels 22a to 22c. , A plurality of (eg, 21) symbols 23, such as a numeral “7” and a plum, are drawn in a line at predetermined intervals in the circumferential direction at a predetermined interval in the circumferential direction. When stopped, three symbols are visible to the player through the reel window 4 for each of the symbol row reels 22a to 22c.

The above-mentioned five activation display lamps 5a to 5e are lit according to the number of medals inserted into the medal insertion slot 9. When one medal is inserted, the central one is displayed.
Only one activation display lamp 5c is turned on, and the pay line L1 extending laterally from the display lamp 5c is activated. When the number of inserted medals is two, three activation display lamps 5b, 5c, 5d near the center are turned on, and three winning lines L extending laterally from these display lamps 5b to 5d.
When the number of inserted medals is three, all of the five activation display lamps 5a to 5e are turned on, and three pay lines L1 to L3 extending horizontally and two wins extending diagonally are activated. The lines L4 and L5 are activated.

The start switch 10 starts the rotation of the three symbol row reels 22a to 22c simultaneously or sequentially, and the stop switches 11a to 11c control the rotation of the corresponding symbol row reels 22a to 22c, respectively. It is stopped individually. When a predetermined combination of symbols is arranged on the pay lines L1 to L5 activated according to the number of inserted medals as described above, the number of acquired coins according to the combination is displayed on the hit number display section 7, and the number of acquired coins is displayed. Of medals from the medal payout port 14 to the medal tray 15
It is paid out to.

The slot machine A is of a so-called credit type, in which a plurality of medals are inserted in advance from the medal insertion slot 9 and deposited, and a game can be played while consuming the deposited medals. The number display section 6 displays the number of deposited medals. Then, before the start switch 10 is operated, the bet switch 12 is set to one.
Press twice to get 3 medals, press twice to get 2 medals,
Pressing three times activates the pay lines L1 to L5 in the same manner as when one medal is inserted. The clearing switch 13 clears the deposited medals and pays out the medals 14
From the player to the medal tray 15.

On the other hand, the reel device 20 is arranged concentrically on the outer periphery of the left symbol row reel 22a, as shown in FIGS. 3 and 4, separately from the three symbol row reels 22a to 22c. A concealing reel 25 as an annular concealing member is provided. The concealing reel 25 is configured to be rotationally driven by a drive motor 26 different from the drive motor 21 of the symbol row reel 22a. The width is set equal to or slightly larger than the width of the symbol row reel 22a. As shown in FIG. 5 which is a development view of the outer peripheral surface of the concealing reel 25,
Is provided with a rectangular opening 27 having a length slightly smaller than the horizontal width and a length in the circumferential direction corresponding to three symbols of the symbol row reel 22a, in other words, substantially the same as the height of the reel window 4. And a plurality (9 in the figure) of star marks 28, 2 as symbols other than the opening 27.
8, ... are drawn and these star marks 28,2
, Are arranged so that the number and the position are different from each other at each position corresponding to the three symbols of the symbol row reel 22a. The concealing reel 25 and the drive motor 26 conceal all three symbols of the left symbol row reel 22 a seen through the reel window 4, and the opening 27 of the concealing reel 25 faces the reel window 4. Concealing means 2 which can be changed to a non-concealing state in which the inner symbol row reel 22a can be seen through the opening 27 and the reel window 4.
In the concealing state of the concealing means 29, the star mark 28 on the outer peripheral surface of the concealing reel 25 is
Through the reel window 4 due to the difference in the stop position of the concealing reel 25
The number and position of 8 are different. FIG.
The numbers on the left side of the middle and concealment reels 25 are the symbol row reels 22.
The number on the right side of the concealing reel 25 is the number of star marks 28 drawn at locations corresponding to three symbols of the symbol row reel 22a.

FIG. 6 shows a block configuration of a control system of the slot machine A. In this figure, reference numeral 30 denotes a machine control unit, and this machine control unit 30
U31 and R for storing programs, fixed data, etc.
OM32 and RAM used for reading and writing data
33 and a random number generator 34 used for various lotteries. The CPU 31 receives signals from the start switch 10, the three stop switches 11 a to 11 c, the bet switch 12, and a medal sensor 37 for detecting the insertion of a medal into the medal slot 9 via the bus 36. , Drive motors 21 for three symbol row reels
A control command signal is output to the concealing reel drive motor 26 and the medal payout machine 38 and the like.

FIGS. 7 and 8 are flowcharts showing the control of the game by the machine control unit 30 (specifically, the CPU 31). Hereinafter, the control will be described with reference to this flowchart.

In FIG. 7, after starting, first, in step S1, it is waited for a medal insertion or a credit operation, which is a game start operation. The medal insertion is determined by the detection signal from the medal sensor 37, and the credit operation is determined by the signal of the bet switch 12.

Subsequently, at step S2, the start switch 10
Is operated, it is determined in step S3 whether or not the bonus winning flag is ON, that is, whether or not it is standing. At the beginning of the game, normally, the bonus winning flag is not raised, so the determination is NO and the process moves to step S4 to perform a lottery. In this lottery, the random number generator 34 is used to determine whether or not an internal prize such as a big bonus, a regular bonus, or a small role is won, and the concealment reel 25 is rotated (that is, the concealment reel 25 conceals the symbol row reel 22a). Is determined, and when the rotation is performed, the stop position (that is, the concealed reel 2 visible from the reel window 4 in the concealed state) is determined.
5 combination of symbols 28) is also determined. In the determination as to whether or not to rotate the concealment reel 25, as shown in FIG. 9 in advance, when there is an internal prize, the rate of rotation of the concealment reel 25 is set to 70%, and the rate of no rotation is set to 30%. In the case of, the reverse ratio is set. In the determination of the stop position of the concealing reel 25, as shown in FIG. 10, a different ratio is set for each type of internal winning (small win 1, small win 2, big bonus, regular bonus) and in the case of loss. The combination of the symbols 28 of the concealing reel 25 seen from the reel window 4 is set to be different. still,
In FIG. 10, "empty" in the symbol combination column means that there is no symbol (star mark) 28. For example, the second symbol "* empty ☆" in the symbol combination column is a concealed reel shown in FIG. It corresponds to the part of the serial numbers 16 to 18 of 25.

After the lottery, it is determined in step S5 whether or not a big bonus or a regular bonus has been won. If the determination is YES, the bonus winning flag is turned on in step S6, and then the process proceeds to step S11 in FIG. On the other hand, when the determination is NO, the process immediately proceeds to step S11 in FIG.

If the player cannot align the bonus symbols on the activated pay lines L1 to L5 of the reel window 4 after the bonus winning flag is turned on and continues the game, the determination in step S3 is made. YES, and a lottery is performed in step S7. In this lottery, similar to the lottery in step S4, the random number lottery device 34 is used to determine whether or not an internal prize such as a small part is won or not, and to determine whether or not the concealment reel 25 needs to be rotated. No lottery will be held.

In step S11 of FIG. 8, the rotation of the three symbol array reels 22a to 22c is started, and after reaching a certain speed, the rotation of the left symbol array reel 22a is stopped by operating the stop switch 11a in step S12. In addition, it is determined whether or not the result of the lottery previously performed in step S4 or S7 is to rotate the concealment reel 25 in step S13. Both determinations are YES
In step S14, the concealing reel 25 is rotated in step S14, the concealing reel 25 conceals three symbols on the left symbol row reel 22a seen from the reel window 4, and the combination of the symbols 28 of the concealing reel 25 determined by lottery is selected. The concealing reel 25 is stopped at a position visible to the player through the reel window 4.

Subsequently, in step S15, it waits until all of the three symbol row reels 22a to 22c stop rotating. When the rotation of the symbol row reels 22a to 22c is stopped, if the result of the lottery in the step S4 or S7 is an internal winning, the stop switches 11a to 1 operated by the player.
Even if the operation timing of 1c is slightly shifted, if it is within the allowable range, so-called pull-in control is performed so that predetermined winning symbols are aligned on the activated winning lines L1 to L5 of the reel window 4. In addition, the player operates the symbol row reel 22.
A predetermined time (for example, 30 seconds) from the start of rotation of a to 22c
When the rotation stop operation (that is, the operation of the stop switches 11a to 11c) is not performed on any of the symbol row reels 22a to 22c, or the rotation of one of the symbol row reels is stopped for a predetermined time after the rotation stop operation of one symbol row reel is performed. When the operation is not performed, the symbol row reels 22 to 22c after the lapse of the operation
Automatically stops all rotations.

Subsequently, in step S16, the concealing reel 25 is
Is rotated to the reel window 4 so that the symbol of the symbol row reel 22a is
Into a non-hidden state that is visible to the player through. After a while
At step S17, it is determined whether or not any of the symbols are aligned on the activated pay lines L1 to L5 of the reel window 4.
When the winning symbols including the special winning such as the big bonus are completed, the winning process is performed in step S18. On the other hand, when the winning symbols are completed, the removing process is performed in step S19. Thus, one game is over, and this is repeated. When the symbols for the special prize are completed, the bonus winning flag is switched to OFF in the prize processing.

Next, the operation and effect of the first embodiment will be described.
When the player operates the start switch 10, the player starts the rotation of the symbol row reels 22a to 22c and performs a lottery at the same time to determine whether or not an internal prize has been won,
5 and so on. Then, when an internal prize is won, the stop switch 1 operated by the player when stopping the rotation of the symbol row rails 22a to 22c.
Even if the operation timings of 1a to 11c are slightly shifted, if the operation timings are within the allowable range, a predetermined winning symbol corresponding to an internal winning is displayed on the activated winning lines L1 to L1 of the reel window 4.
The pull-in control is performed so as to align with L5.

When rotating the concealing reel 25, first, of the three stop switches 11a to 11c,
The stop switch 11 on the left where the player normally operates first
a, the concealment reel 25 is rotated after the rotation of the left symbol row reel 22a is stopped, and the concealment reel 25 allows the left symbol row reel 22a 3 to be seen from the reel window 4.
The symbol is hidden once. Next, three symbol row reels 22
After all of the rotations a to 22c stop, the concealment reel 25 is rotated again, and the opening 27 is moved to a position facing the reel window 4.

The rotation of the concealment reel 25 is performed at a rate of 70% when there is an internal prize, and at a rate of 30% when the prize has no internal prize.
The rotation of the concealment reel 25 causes the left symbol row reel 22 to rotate.
When it is confirmed that a is concealed, the game is played with high expectation for the internal prize, and the interest can be enhanced. In addition, the symbol row reel 22 by the concealment reel 25
The concealed state of “a” is recognized by the player at a glance without being affected by the lighting and noise in the hall, so that the impact on the player can be increased.

When the symbol reel 22a is concealed by the concealing reel 25, the star mark 28 drawn on the outer peripheral surface of the concealing reel 25 is visible to the player through the reel window 4 and the stop position of the concealing reel 25 is stopped. Star mark 2 visible through reel window 4 due to differences
Since the number and the position of the 8 are different, it is possible to enhance the design interest. In addition, the stop position of the concealing reel 25 is determined at a ratio according to the type of the internal winning, and when, for example, three star marks 28 appear in the concealed state (when the combination of the symbols in FIG. 10 is “☆☆☆”) Has a high probability that the internal prize is a big bonus or a regular bonus,
Further, when the star mark 28 does not appear at all (when the combination of symbols in FIG. 10 is “empty sky”), the probability that the internal winning is a small role is high, and the player appears in this concealed state. The type of internal prize can be easily estimated from the number and position of the star marks 28, and the interest of the game can be further enhanced.

Further, the concealment reel 25 is rotated and changed to the concealed state after the left symbol row reel 22a to be concealed stops rotating, and the stop switch 11a corresponding to the left symbol row reel 22a is operated. Since the opening portion 27 of the concealing reel 25 is sometimes in the non-concealing state facing the reel window 4 and does not hinder the visual recognition of the symbol row reel 22a, the player stops the symbol row reel 22a at a specific symbol. Pressing can be performed without discomfort.

In the first embodiment, the left symbol row reel 22 of the three symbol row reels 22a to 22c is used.
The concealing reel 25 is arranged concentrically around the outer periphery of the symbol a.
The center symbol row reel 22b or the right symbol row reel 22
The concealing reel 25 may be arranged concentrically on the outer periphery of c, and the same operation and effect can be obtained.

In the first embodiment, the rotation of the concealing reel 25, that is, the concealing operation of the symbol row reel 22a inside the concealing reel 25 is performed after the rotation of the symbol row reel 22a is stopped. Pattern row reel 22a
The rotation may be performed after all rotations of the rotations 22c to 22c are stopped.

Furthermore, in the first embodiment, the concealing operation of the symbol row reel 22a by the concealing reel 25 is performed with a probability of 70% for all the internal winnings. However, the present invention relates to all the internal winnings. The concealment operation of the symbol row reel 22a by the concealment reel 25 may be performed with a probability other than 70%. Of the internal winnings, the concealing reel 25 performs the concealing operation of the symbol row reels 22a to 22c with the probability of 100% or other probability as the flag notification only when the special prize of the big bonus or the regular bonus is obtained. The concealment operation of the symbol row reels 22a to 22c by the concealment reel 25 may be performed at the probability of 100% or another probability as the small role announcement only at the time of winning.

(Second Embodiment) FIG. 11 shows a second embodiment of the present invention.
The reel device 40 of the slot machine A according to the embodiment of the present invention, the reel device 40 includes three symbol row reels 22
Concealment reels 41a, 41b, 4 as three annular concealing members arranged concentrically around the outer circumferences of a to 22c, respectively.
1c.

Each of the concealing reels 41a to 41c is a first reel.
Similarly to the case of the concealing reel 25 in the embodiment, the drive motor 21 (see FIG. 4) different from the drive motor 21 of each of the inner symbol row reels 22a to 22c is independently rotated and driven. And each concealed reel 4
Each of 1a to 41c is provided with a rectangular opening 27 whose width is slightly smaller than the width of the concealing reel 25 and whose circumferential length is substantially the same as the height of the reel window 4 (see FIG. 4). (See FIG. 5) as a plurality of symbols at locations other than the opening 27. And three concealed reels 4
1a to 41c and the drive motor 26, the reel window 4
Of three symbol row reels 22a to 22c seen through
The concealing state of concealing all of the symbols (that is, nine symbols), and the opening 27 of each of the concealing reels 41 a to 41 c is located opposite to the reel window 4, and the inner symbol row passes through the opening 27 and the reel window 4. A concealing means 42 is provided which can be changed to a non-concealed state in which the reels 22a to 22c are visible.
In the concealing state of the concealing means 42, each of the concealing reels 41a to 41a to
The star mark 28 on the outer peripheral surface of the reel 41c is seen through the reel window 4 and the star mark 28 seen through the reel window 4 as shown in FIGS. 13A to 13D, for example, due to the difference in the stop positions of the concealment reels 41a to 41c. Are different in number or arrangement pattern.

The appearance of the slot machine A is the same as that of the first embodiment shown in FIG. 1. The block configuration of the control system of the slot machine A is the same as that of the first embodiment shown in FIG. This is the same except that three drive motors 26 are provided. In the following description, the same reference numerals will be used to refer to the same members and components as in the first embodiment.

The machine control unit 3 of the slot machine A
The control of the game by 0 is performed according to the flowchart shown in FIG. 7 for the first half as in the first embodiment, and is performed according to the flowchart shown in FIG. 12 for the second half.

That is, in FIG. 7, first, in steps S1 and S2, there is a medal insertion or a credit operation for starting the game, and after waiting for the start switch 10 to be operated, the bonus winning flag is turned on in step S3. It is determined whether or not there is, and if the determination is NO, a lottery is performed in step S4. In this lottery, whether the internal prize such as a big bonus, a regular bonus, or a small role is determined is determined, and the concealment reels 41a to 41c are rotated (that is, the symbol row reels 22a to 22c are concealed by the concealment reels 41a to 41c). It is also determined whether or not to stop the rotation, and also to determine their stop positions (that is, the number or arrangement pattern of the star marks 28 of the concealing reels 41a to 41c that can be seen from the reel window 4 in the concealed state).
In the determination as to whether or not to rotate the concealment reels 41a to 41c, the rate at which the concealment reels 41a to 41c are rotated when there is an internal winning is determined in advance, as shown in FIG. 9, as in the first embodiment. The ratio is set to 70%, the ratio not to be performed is set to 30%, and in the case of loss, the ratio is set to the opposite ratio. However, in this case, the internal prize is limited to a big bonus or a regular bonus, and the small prize win corresponds to a loss. In determining the stop positions of the concealing reels 41a to 41c, the types of internal winnings (big bonus,
Concealed reels 41a to 41c that can be seen from the reel window 4 at a different rate for each regular bonus and in the case of a loss.
Are set so that the number or arrangement pattern of the star marks 28 is different. In FIG. 14, the first to fourth columns in the column of the number of star marks (☆) 28 are the arrangement patterns of FIGS. 13A to 13D, respectively. There is no state.

After the lottery, it is determined in step S5 whether or not the big bonus or the regular bonus has been won. If the determination is YES, the bonus winning flag is turned on in step S6, and then the process proceeds to step S21 in FIG. On the other hand, when the determination is NO, the process immediately proceeds to step S21 in FIG.

On the other hand, if the determination in step S3 is YES, a lottery is performed in step S7. In this lottery,
As with the lottery in step S4, the determination of the success or failure of the internal prize such as the small winning combination and the determination of the necessity of rotating the concealment reels 41a to 41c are performed, but the lottery of the big bonus and the regular bonus is not performed.

In step S21 of FIG. 12, the rotation of the three symbol row reels 22a to 22c is started, and after reaching a certain speed, the player's stop switches 11a to 11c are turned on in step S22.
11c three symbol row reels 22a to 22c by the operation of 11c
Wait for all rotations to stop. Symbol row reel 22a ~
When the rotation of the motor 22c is stopped, the above step S4 or S7
In the case where the result of the lottery performed in the above is an internal prize, even if the operation timing of the stop switches 11a to 11c operated by the player is slightly shifted, if it is within an allowable range, a predetermined prize symbol is displayed on the reel window 4. The pull-in control is performed so as to be aligned on the activated pay lines L1 to L5.

Subsequently, in step S23, it is determined whether or not any of the symbols on the activated prize lines L1 to L5 of the reel window 4 is completed. When the special prize symbols of the big bonus or the regular bonus are completed, Step S2
In step S24, when the small winning symbol or the winning symbol is completed, the result of the lottery performed in step S4 or S7 is performed by rotating the concealment reels 41a to 41c. Is determined. If the determination is YES, the three concealing reels 41a to 41c are rotated in step S25, and all of the three symbol row reels 22a to 22c visible from the reel window 4 are concealed by these concealing reels 41a to 41c, and the lottery is performed. Concealed reels 41a to 41c determined in
The concealing reels 41a to 41c are respectively stopped at predetermined positions so that the player can see the arrangement pattern of the star mark 28 through the reel window 4. The stop of the three concealing reels 41a to 41c is performed by, for example, the concealing reel 4 on the left side.
1a, right concealment reel 41c, central concealment reel 41
Perform in the order of b.

Thereafter, in step S26, the opening 27 of each of the concealing reels 41a to 41c is rotated to the reel window 4, respectively, and the symbols of the symbol row reels 22a to 22c are passed through the opening 27 and the reel window 4. In a non-concealed state that can be seen by others. Subsequently, in step S27, a small winning or losing process is performed according to the symbols aligned on the activated pay lines L1 to L5 of the reel window 4, and the process returns.

In the second embodiment,
The same operation and effect as those of the first embodiment can be obtained. In particular, the symbol row reel 22 by the concealing means 42
In the concealment state of a to 22c, three concealment reels 41a to 41a to
Since all of the three symbol row reels 22a to 22c seen from the reel window 4 are hidden by the 41c, the impact on the player can be greatly increased. In the concealed state, the star mark 28 drawn on the outer peripheral surface of each of the concealed reels 41a to 41c has various arrangement patterns as shown in FIGS. Since the player can see the game through the reel window 4, the design and game interest can be greatly enhanced.

In the second embodiment, a plurality of star marks 28 are drawn in the same arrangement on the outer peripheral surface of each of the concealing reels 41a to 41c. A plurality of different designs, for example, designs of animals and insects, may be drawn on the outer peripheral surface. As shown in FIG. 15, “Large” is added to each of the three symbols of the concealing reels 41 a to 41 c seen from the reel window 4.
The characters “to” and “ri” may be drawn in a large size, and the internal prize of the big bonus or the regular bonus may be displayed as a flag notification with a 100% probability.

(Third Embodiment) FIG. 16 shows a third embodiment of the present invention.
The reel device 50 of the slot machine A according to the embodiment of the present invention, the reel device 50 includes three symbol row reels 22
In addition to the mask members 51a to 22c, a mask member 51 is provided on the outer periphery of the left symbol row reel 22a.

The mask member 51 is formed as shown in FIGS.
As shown in FIG. 5, a strip-shaped mask portion 51a concentrically curved with the symbol row reel 22a, and a fan-shaped support portion 51b connected to one side edge of the mask portion 51,
A rotating shaft 52a of a drive motor 52 different from the drive motor 21 of the inner symbol row reel 22a is connected to the support portion 51b.
The first mask portion 51a is directed forward, that is, close to the reel window 4 to shield all three symbols of the symbol array reel 22a seen from the reel window 4, and the symbol array reel 22a is separated from the reel window 4 and is not interrupted. It is designed to rotate between an upward non-blocking position to be in a state. A pair of mask members 51 and a drive motor 52 constitute a concealing means 53 that can be switched between a concealed state in which the left symbol row reel 22a seen through the reel window 4 is concealed and a non-concealed state.

The width of the mask portion 51a is set to be slightly larger than the width of the symbol row reel 22a, and the length of the mask portion 51a in the longitudinal direction (circumferential direction) is 6 times that of the symbol row reel 22a. It is set to the length corresponding to the symbol. Then, as shown in FIG. 19, the mask part 51a has a plurality of symbols, "6
Characters are drawn, and three characters of "out", "reappearance" or "big hit" are used as the shielding position (rotation stop position) of the mask portion 51a, for example, through the reel window 4 as shown in FIG. The position that can be seen by the person can be taken selectively.

The appearance of the slot machine A is the same as that of the first embodiment shown in FIG. 1. The block configuration of the control system of the slot machine A is the same as that of the first embodiment shown in FIG. This is the same except that a mask member drive motor 52 is provided in place of the drive motor 26.
In the following description, the same reference numerals will be used to refer to the same members and components as in the first embodiment.

The machine control unit 3 of the slot machine A
The control of the game by 0 is performed according to the flowchart shown in FIG. 7 for the first half in the first embodiment, and is performed according to the flowchart shown in FIG. 21 in the first embodiment.

That is, in FIG. 7, first, in steps S1 and S2, there is a medal insertion or a credit operation for starting the game, and after waiting for the start switch 10 to be operated, the bonus winning flag is turned on in step S3. It is determined whether or not there is, and if the determination is NO, a lottery is performed in step S4. In this lottery, it is determined whether or not an internal prize such as a big bonus, a regular bonus, or a small role is accepted, and whether or not the mask member 51 is rotated (that is, the symbol row reel 22a is concealed by the mask member 51) is determined. When the rotation is performed, the rotation stop position (that is, the mask member 5 visible from the reel window 4 in the concealed state).
1) is also determined. In determining whether or not to rotate the mask member 51, as shown in FIG. 22 in advance, when there is an internal winning, the ratio of rotating the mask member 51 is set to 70%, and the ratio of not rotating is set to 30%. In the case of a loss, the ratio is set to the opposite ratio. However, in this case, the internal prize is limited to a big bonus or a regular bonus, and the small prize win corresponds to a loss. In determining the rotation stop position (concealment position) of the mask member 51,
As shown in FIG. 23, the characters viewed from the reel window 4 are set so as to be "outside", "recovery hit" or "big hit" at different ratios in the case of the internal winning and the case of the loss. ing.

After the lottery, it is determined in step S5 whether or not the big bonus or the regular bonus has been won. If the determination is YES, the bonus winning flag is turned on in step S6, and then the process proceeds to step S31 in FIG. On the other hand, when the determination is NO, the process immediately proceeds to step S31 in FIG.

On the other hand, if the determination in step S3 is YES, a lottery is performed in step S7. In this lottery,
As with the lottery in step S4, the determination of the success or failure of the internal prize such as the small role and the necessity of the rotation of the mask member 51 are determined, but the lottery of the big bonus and the regular bonus is not performed.

In step S31 of FIG. 21, the rotation of the three symbol row reels 22a to 22c is started, and after reaching a certain speed, the rotation of the left symbol row reel 22a is stopped by operating the stop switch 11a in step S32. It is determined whether or not the process has been performed.
Alternatively, it is determined whether or not the result of the lottery performed in S7 is to rotate the mask member 51. Both of these judgments are Y
In the case of ES, the mask member 51 is rotated in step S34, the mask member 51 conceals three symbols of the left symbol row reel 22a seen from the reel window 4, and the mask portion 51 of the mask member 51 determined by lottery. The mask member 51 is stopped at a position where the upper characters "outside", "re-big hit" or "big hit" can be seen by the player through the reel window 4.

Subsequently, in step S35, it waits until all of the three symbol row reels 22a to 22c stop rotating. When the rotation of the symbol row reels 22a to 22c is stopped, if the result of the lottery in the step S4 or S7 is an internal winning, the stop switches 11a to 1 operated by the player.
Even if the operation timing of 1c is slightly shifted, if the operation timing is within the allowable range, the pull-in control is performed so that the predetermined winning symbols are aligned on the activated winning lines L1 to L5 of the reel window 4.

Subsequently, in step S36, the mask member 51
Is moved to a position not visible from the reel window 4 (non-concealed position), and the left symbol row reel 22a
Is the reel window 4 like the other symbol row reels 22b and 22c.
Into a non-hidden state that is visible to the player through. After a while
In step S37, it is determined whether or not any of the symbols are aligned on the activated pay lines L1 to L5 of the reel window 4.
When the winning symbols including the special winning such as the big bonus are completed, the winning process is performed in step S38, and when the winning symbols are completed, the removing process is performed in step S39.

Then, also in the third embodiment,
Instead of the concealing reel 25 in the first embodiment, the mask member 51 conceals the left symbol row reel 22a seen from the reel window 4, so that a lottery result of the internal prize is displayed with a predetermined probability. Since the player can recognize the light at a glance without being affected by the lighting and noise of the player, the effect of increasing the impact on the player can be obtained as in the first embodiment. It is.

In the third embodiment, six characters of "losing big hit" are drawn on the mask portion 51a of the mask member 51, and when the mask member 51 is concealed, "missing", "re big hit" or "big hit" is drawn. Is configured to be visible from the reel window 4.
a shows a star mark 28 as in the first and second embodiments.
Or a plurality of patterns such as animals and insects may be drawn so that they can be seen from the reel window 4 with the mask member 51 concealed.

In the third embodiment, the mask member 51 (specifically, the mask portion 51a) curved in an arc shape is concentrically arranged only on the outer periphery of the left symbol row reel 22a. A mask member 51 curved in an arc shape may be concentrically arranged on the outer periphery of each of the three symbol row reels 22a to 22c. At this time, for example, as shown in FIG. 24, “big hit” or “missing” is displayed through the reel window 4 by characters drawn on each mask member 51 in a state where the symbol row reel is concealed by the three mask members 51, 51, 51. Thus, the impact on the player may be further increased. However, in this case, "big hit" is displayed when the internal winning is a big bonus or a regular bonus, and "losing" is displayed otherwise.

(Other Embodiment) FIG. 25 shows another embodiment of the shielding means which is a main component of the present invention. The shielding means 60 includes a rectangular flat plate-shaped mask member 62 disposed between the back surface of the reel window and the reel device 70 in the housing so as to be vertically movable along the guide rails 61, 61;
The mask member 62 includes a drive source (not shown) such as a solenoid for moving the mask member 62 up and down. The mask member 62 includes three symbol row reels 22a, 22b, and 2 of the reel device 70.
It moves up and down along the guide rails 61 between a shielding position located near the reel window 2c and shielding them, and a non-shielding position located above the shielding position.

The present invention includes various other embodiments of the shielding means. For example, in the third embodiment, the mask member 51 arranged on the outer periphery of the symbol row reel 22a conceals all three symbols of the symbol row reel 22a seen from the reel window 4. Alternatively, the left half of the symbol row reel 22a seen from the reel window 4 may be concealed, or a single symbol at the center of the symbol row reel 22a may be seen and its periphery may be concealed. Further, the concealing means may be constituted by using a liquid crystal shutter or the like which is switched between a transparent state and an opaque state by a voltage.

FIG. 26 shows a mask member 80 according to a modification of the third embodiment. This mask member 80 is, like the mask member 51 in the third embodiment, provided on the outer periphery of the left symbol row reel. Arranged concentrically curved,
In addition, the drive motor is operated to approach the reel window to close the whole or a part of the symbol row reel viewed from the reel window, and the non-blocking position upward to separate the symbol row reel from the reel window to the non-blocking state. It is designed to rotate between and.

The mask member 80 (a portion corresponding to the mask portion 51a of the mask member 51 in the third embodiment)
Is set slightly larger than the width of the symbol row reel, and the length of the mask member 80 in the longitudinal direction (circumferential direction) is set to a length corresponding to nine symbols of the symbol row reel. I have. In the upper three design portions of the mask member 80, three invisible portions (indicated by circles in the figure) 81, 81,
81 are provided, and a rectangular opening 82 having a size of one symbol and two invisible portions 81 and 81 are provided in a central three symbol portion, and a size of two symbols is provided in a lower three symbol portion. A vertically long rectangular opening 83 and one invisible portion 81 are provided. The unrecognizable portion 81 is a portion where the inner symbol row reel cannot be visually recognized, and a symbol such as “☆” may or may not be drawn here.

The upper three symbol portions of the mask member 80 stop the rotation of the left symbol row reel at the time of displaying with a predetermined probability that the lottery result is an internal prize, as in the third embodiment. After that, the mask member 80 is used for concealing all three symbols of the symbol row reel which can be seen from the reel window by the rotation / stop of the mask member 80. In addition, the central three design portions and the lower three design portions of the mask member 80 are used to realize a game in which the corresponding stop switch is operated in a state where the symbol row reels can be seen in a limited range through the openings 82 and 83, respectively. It is used.

As a game method using the lower three symbol portions of the mask member 80, for example, when a specific internal winning is determined by lottery or at the time of a special game, as shown in FIG. The mask member 80 is rotated at the same time as the rotation start of the rotation of .about.22c, and stopped at a position where the left symbol row reel 22a is concealed by the three lower symbol portions. In this concealed state, the opening 8 smaller than the reel window 4
3, the spinning symbol row reel 22a is seen, the player pushes through the opening 83 and the reel window 4, and moves the mask member 80 after all the three symbol row reels 22a to 22c stop. There are some that make the hidden symbols visible to the player.

As a game method using the central three design portions of the mask member 80, the opening 82 smaller than the reel window 4 is used as in the game method using the lower three design portions described above.
28, for example, cherry, ☆, plum, cherry, bell, each symbol of “7” on the left symbol row reel 22a concealed by the mask member 80 in order from the top as shown in FIG. Draw. And
When the symbol of the cherry appears in the opening 82 of the mask member 80 and the symbol row reel 22a is stopped by the player's eye pressing as shown in FIG. 29, the portion hidden by the mask member 80 is marked with "☆, plum". Alternatively, there is a possibility that there is a symbol of "Bell, 7", but if the presence or absence of a prize is determined by the difference of this symbol, the three symbol row reels 22a to 22a
The player's interest can be maintained until the mask member 80 moves and the concealed symbol is seen after all the stops in 2c.

In the first to third embodiments, the concealing reels 25, 41a to 41c or the masking reels 25, 41a to 41c or the mask after the rotation of the symbol row reels 22a to 22c concealed by the mask member 51 are stopped. Member 5
1 is turned to the concealed state. However, in the present invention, the rotation of the three symbol row reels 22a to 22c is started by operating the start switch 10 and the concealed reel 25 is rotated until the speed reaches a certain speed. , 41a to 41c or the mask member 51 may be rotated to temporarily enter the concealed state, and thereafter returned to the non-concealed state.

In each of the above embodiments, the slot machine provided with three symbol row reels 22a to 22c has been described. However, the present invention is also applicable to a slot machine provided with four symbol row reels. It goes without saying that the same can be applied. In addition, as a slot machine, instead of the symbol row reels 22a to 22c, a slot machine provided with a symbol row rotating member composed of an endless belt having a plurality of symbols drawn on an outer peripheral surface has been proposed. It can be applied to various kinds of slot machines. In this case, the concealing member arranged on the outer periphery of the symbol row rotating member may be configured using an end level as in the case of the symbol row rotating member.

[0073]

As described above, according to the slot machine of the present invention, a part of at least one symbol row rotating member visible through the symbol display window is concealed by the concealing means, so that the lottery result is a predetermined result. Since it is displayed with a probability and is recognized at a glance by the player without being affected by the lighting and noise in the hall, the impact on the player can be increased and the interest of the game can be increased.

In particular, in the invention according to claim 2, when the stop switch is operated, the concealing means is in the non-concealed state and does not hinder the visual recognition of the symbol row rotating member.
The player can perform the eye-catching without a sense of incongruity, which is very effective in realizing the implementation.

According to the third aspect of the present invention, the annular concealing member disposed on the outer periphery of the symbol row rotating member is rotated to a position where its opening faces the symbol display window.
The inner pattern row rotating member can be easily changed to a non-concealed state visible to the player through the opening of the concealing member and the symbol display window, and concealed by using a relatively wide portion other than the opening of the concealing member. This also has the effect of improving the design or playability in the state.

In the invention according to claim 4, when the concealing member is rotated and changed to a concealing state for concealing the inner symbol row rotating member, a part of the symbol drawn on the concealing member can be seen through the symbol display window, In addition, since the symbol is stochastically different depending on the type of the internal prize, the player can easily estimate the type of the internal prize from the symbol, and the gaming performance can be further enhanced.

In the invention according to claim 5, the strip-shaped mask member arranged on the outer periphery of the symbol row rotating member is moved by the driving means between the concealing position close to the symbol display window and the non-concealment position separated from the symbol display window. , The switching between the concealed state and the non-concealed state can be reliably performed, and implementation can be facilitated.

In the invention according to claim 6, when the mask member is rotated and changed to a concealing state for concealing the inner symbol row rotating member, a part of the symbol drawn on the mask member can be seen through the symbol display window. In addition, since the symbols are stochastically different depending on the type of the internal winning, the player can easily estimate the type of the internal winning from the symbol, and the gaming ability can be further enhanced.

Further, in the invention according to claim 7, in addition to the normal game in which the stop switch can be operated without hindering the visual recognition of the symbol row rotating member, the mask member is in the non-concealed state. A game in which the corresponding stop switch is operated in a state where the symbol row rotating member can be seen in a limited range through the opening can be realized, and the game performance can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a front view showing an appearance of a slot machine according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a reel device of the slot machine.

FIG. 3 is a perspective view showing a left symbol row reel portion of the reel device.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a development view of an outer peripheral surface of the concealing reel.

FIG. 6 is a block diagram of a control system of the slot machine.

FIG. 7 is a flowchart showing the first half of the game control.

FIG. 8 is a flowchart showing the latter half.

FIG. 9 is a diagram illustrating a ratio of a case where the concealing reel is rotated and a case where the rotation is not performed.

FIG. 10 is a diagram showing the ratio of symbol combinations viewed through the reel window in the concealed state of the concealed reel.

FIG. 11 is a view corresponding to FIG. 2, showing a second embodiment.

FIG. 12 is a diagram corresponding to FIG. 8;

FIG. 13 is a diagram showing an arrangement pattern of symbols that can be seen through the reel window in the concealed state of the concealed reel.

FIG. 14 is a diagram showing a ratio of each arrangement pattern of the symbol.

FIG. 15 is a diagram showing a deformation of a symbol seen through the reel window in a concealed state of the concealed reel.

FIG. 16 is a view corresponding to FIG. 2 showing a third embodiment.

FIG. 17 is a diagram corresponding to FIG. 3;

18A and 18B show a concealing means, wherein FIG. 18A is a front view, and FIG. 18B is a right side view.

FIG. 19 is a development view of a mask portion of the mask member of the concealing means.

FIG. 20 is a view showing one concealed state of the mask member viewed from the reel window.

FIG. 21 is a diagram corresponding to FIG. 8;

FIG. 22 is a diagram illustrating a ratio between a case where the mask member is rotated and a case where the mask member is not rotated.

FIG. 23 is a diagram showing a ratio of each character viewed through a reel window in a mask member in a concealed state.

FIG. 24 is a diagram illustrating a deformation of a character seen through the reel window in the concealed state of the concealed reel.

FIG. 25 is a perspective view showing another embodiment of the concealing means.

FIG. 26 is a development view of a mask member according to a modification of the third embodiment.

FIG. 27 is an explanatory diagram for explaining a game method using the lower three symbol portions of the mask member.

FIG. 28 is a diagram showing an example of a symbol array of symbol row reels.

FIG. 29 is an explanatory diagram for explaining a game method using three central symbol portions of the mask member.

[Explanation of symbols]

A slot machine 4 reel window (symbol display window) 10 start switch 11a, 11b, 11c stop switch 22a, 22b, 22c symbol array reel (symbol array rotating member) 25, 41a, 41b, 41c concealing reel (concealing member) 26, 52 Drive motor (drive means) 27 Opening of concealing reel 28 Star mark (design) 29, 42, 53, 60 Concealing means 30 Machine control unit 51, 62, 80 Mask member 82, 83 Opening of mask member

Claims (7)

[Claims] At least a start switch is provided on a front surface of a housing,
A stop switch and a symbol display window are provided, and a plurality of symbol row rotating members each of which draws a plurality of symbols on the outer peripheral surface are arranged in a horizontal line so as to be partially visible through the symbol display window in the housing, At the same time that the rotation of each symbol row rotating member is started by the operation of the start switch, the success or failure of the internal winning is determined by lottery, and when the internal winning is performed, the stop switch is operated to stop the rotation of each symbol row rotating member. A slot machine that controls the winning symbols to be aligned on the symbol display window, wherein at least one of the symbols is visible through the symbol display window in the housing.
A concealing means that can be changed between a concealed state and a non-concealed state for concealing a part of the symbol row rotating members is arranged, and the concealing means displays with a predetermined probability that the result of the lottery is an internal winning. A slot machine characterized by being configured as follows. 2. The slot machine according to claim 1, wherein said concealing means is provided so as to be changed to a concealed state when the stop switch corresponding to the concealed symbol row rotating member is not operated during a game in which the stop switch is not operated. . 3. The concealing means includes an annular concealing member disposed on an outer periphery of at least one symbol row rotating member, and a driving means for rotating the concealing member. Is provided with an opening whose length in the circumferential direction is substantially the same as the height dimension of the symbol display window, and when the concealing means is not concealed, the inner symbol row rotating member can be seen through the opening and the symbol display window. 3. The slot machine according to claim 1, wherein 4. A plurality of symbols are drawn on the concealing member at positions other than the opening, and in the concealing state of the concealing means, some of these symbols can be seen through the symbol display window.
4. The slot machine according to claim 3, wherein the symbols viewed through the symbol display window are stochastically different depending on the type of the internal winning. 5. The masking means, comprising: a strip-shaped mask member disposed on an outer periphery of at least one symbol row rotating member;
The mask member is rotated between a concealing position in which a part of the symbol row rotating member is concealed by approaching the symbol display window and a non-concealing position in which the symbol row rotating member is separated from the symbol display window and is in the non-concealed state. 3. The slot machine according to claim 1, further comprising: a driving means for moving the slot machine. 6. A plurality of symbols are drawn on the mask member. In the concealed state of the concealing means, some of these symbols are visible through the symbol display window, and through the symbol display window according to the type of internal winning. The slot machine according to claim 5, wherein the visible symbols are provided so as to be stochastically different. 7. The mask member is provided with an opening whose length in the longitudinal direction is smaller than the height of the symbol display window, and the symbol row rotating member being rotated can be seen through the opening and the symbol display window. 6. The slot machine according to claim 5, wherein a corresponding stop switch is operated.