JP2002292071A - Game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a game machine which can improve noise immunity. SOLUTION: In a main control board 64 made of a multilayer printed wiring board, a signal layer 69 is formed on the back of the main control board 64, and a grounding layer 70 and a power supply layer 71 are formed inside. In this constitution, a GND(ground) cover 72 having a transparent metal film 74 covers the back of the signal layer 69. Thus, as external noise due to charge of pachinko balls or illicit radio wave is difficult to invade, noise immunity of the main control board 64 is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gaming machine having a control board for driving and controlling a load.

[0002]

The above-mentioned gaming machine has a structure in which a control device and a drive circuit are mounted on a control board, and the load is driven and controlled based on outputting a control signal from the control device to the drive circuit. is there. In the case of this configuration, there is a possibility that external noise due to an electric charge of a pachinko ball or an illegal radio wave enters the signal layer of the control board and a malfunction may occur in the control board, so that there is room for improvement in terms of noise resistance. . 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 capable of improving noise resistance.

[0003]

A game machine according to the present invention is characterized in that the gaming machine includes a control board for driving and controlling a load, and a ground layer is provided on both sides of the signal layer of the control board. have. According to the above means, since the ground layers are provided opposite to both surfaces of the signal layer, the electrical exposure of the signal layer to noise is reduced. For this reason,
Since external noise due to the electric charge of the pachinko ball or illegal radio waves hardly enters the signal layer, the noise resistance of the control board is improved, and malfunction of the control board is prevented.

According to a second aspect of the present invention, a ground layer made of a printed pattern is formed facing one surface of the signal layer of the control board, and a ground layer made of a cover is placed facing the other surface of the signal layer. It is characterized by According to the above-described means, the signal layer can be inspected or the like by removing the cover from the control board, so that the maintainability of the control board is improved.

[0005] The gaming machine according to claim 3 is characterized in that the control board is formed of a multilayer printed wiring board having at least one ground layer formed therein. According to the above means, external noise is more unlikely to enter at least one of the ground layers, so that the noise resistance of the control board is further improved.

A gaming machine according to a fourth aspect is characterized in that both ground layers are provided corresponding to substantially the entire area of the signal layer. According to the above means, the amount of electrical exposure to noise of the signal layer is further reduced, so that the electromagnetic shielding effect of the signal layer is enhanced. This makes it more difficult for external noise to penetrate the signal layer, thereby further improving the noise resistance of the control board.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 5, an outer frame 1 is installed on the island of the pachinko hall. The outer frame 1 has a rectangular cylindrical shape whose front and rear surfaces are open. The outer frame 1 has a front door 2 as shown in FIGS.
Are mounted so as to be rotatable about both vertical axes 3 on the left side. As shown in FIG. 3A, a payout opening 4 is fixed to the front door 2 at the lower end. The payout opening 4 has a cylindrical shape with front and rear surfaces opened, and a lower plate 5 is fixed to the front door 2 in front of the payout opening 4.

A horizontally long rectangular front plate 6 is attached to the front door 2 so as to be rotatable around a vertical axis (not shown) on the left side. A cylindrical payout opening 7 having an open surface is fixed. An upper plate 8 is fixed to the front surface of the front plate 6, and a pachinko ball (not shown) is stored in the upper plate 8.

A firing handle 9 is rotatably mounted on the front door 2 at the lower right, and on the rear surface of the front door 2 is located behind the firing handle 9 as shown in FIG. The firing motor 10 is mounted. This launch motor 1
As shown in FIG. 3A, a hitting hammer 11 is connected to the 0 rotation axis via a hitting mechanism (not shown), and the rotation axis of the firing motor 10 rotates in the hitting hammer 11. Drive based on

A ball feed mechanism 12 is mounted on the rear surface of the front plate 6. The ball feed mechanism 12 sends the pachinko ball in the upper plate 8 to the hitting hammer 11 based on driving in conjunction with the hitting hammer 11. The hitting hammer 11 is a pachinko ball supplied from the ball feeding mechanism 12. Hit.

A rectangular window frame 13 is mounted on the inner peripheral surface of the front door 2 so as to be rotatable around a vertical axis (not shown) on the left side. Has a transparent glass window 1
4 are held. Further, a mechanism panel (not shown) is fixed to a rear surface of the front door 2. FIG. 4 shows the mechanism panel.
As shown in the figure, the game board 15 is held and the game board 1
5 is covered with a glass window 14 from the front.

As shown in FIG. 3A, a frame key 16 is mounted on the right side of the front door 2, and the frame key 16 closes the front door 2 to the front end surface of the outer frame 1. Lock in state,
The window frame 13 is locked in a closed state fitted on the inner peripheral surface of the front door 2. The frame key 16 is provided with a key (not shown). When the key is inserted into the frame key 16 and rotated clockwise in FIG. 3A, the lock of the front door 2 is released. When the counterclockwise rotation operation is performed, the window frame 1
3 is released.

A lock mechanism 17 is mounted on the rear surface of the front plate 6. When the lock mechanism 17 is locked, the front plate 6 is held in a closed state fitted on the inner peripheral surface of the front door 2.
The lock mechanism 17 is operated by inserting a hand behind the front plate 6 from above with the window frame 13 opened, and the front plate 6 operates the lock mechanism 17 from the locked state to the unlocked state. Opened based on

As shown in FIG. 4, an outer rail 18 and an inner rail 19 are fixed to the front of the game board 15, and the pachinko balls hit by the ball hammer 11 pass between the outer rail 18 and the inner rail 19 to play a game. It is discharged to the upper part in the board 15. Further, a plurality of obstacle nails 20 are driven into the game board 15, and the pachinko balls released to the upper part in the game board 15 fall while hitting the obstacle nails 20.

On the front of the game board 15, a special symbol starting port 21 is provided.
Has been fixed. The special symbol opening 21 has a pocket shape with an open upper surface.
A special symbol start sensor 22 (see FIG. 2) is fixed in 1. The special symbol start sensor 22 is composed of a proximity switch, and detects that a pachinko ball has entered the special symbol start port 21 and outputs a special symbol start signal St.

As shown in FIG. 2, the special symbol start sensor 22 is electrically connected to a main controller 23 (corresponding to a controller) mainly composed of a microcomputer. The main control unit 23 includes a CPU 24, a ROM
25, a RAM 26 (see FIG. 1A), etc., and performs a jackpot determination process based on the temporal timing of detecting the special symbol start signal St from the special symbol start sensor 22. Based on the result, the left column design, the middle column design, and the right column design process are performed.

As shown in FIG. 4, a display board 27 is fixed to the game board 15, and the display board 27 holds a symbol display device 28 composed of a color liquid crystal display.
The symbol display device 28 corresponds to a load, and an LCD drive circuit 29 corresponding to a drive unit is electrically connected to the symbol display device 28 as shown in FIG. The LCD drive circuit 29 is mainly composed of a plurality of transistors arranged in a matrix. The LCD drive circuit 29 includes a symbol control device 30 (corresponding to a control unit) mainly composed of a microcomputer. Connected. The symbol control device 30 includes a CPU, ROM, R
AM (neither is shown), etc.
The display content of the symbol display device 28 is controlled based on the drive control of the D drive circuit 29.

The symbol control device 30 is electrically connected to the main control device 23. The main control device 23 sets a symbol command Sz based on the result of the symbol setting, and outputs the symbol command Sz to the symbol control device 30. Then, the symbol control device 30 drives and controls the LCD drive circuit 29 based on the symbol command Sz, and causes the symbol display device 28 to display a symbol (a left column setting symbol, a middle column setting symbol, and a right column setting symbol) corresponding to the symbol command Sz. (Set symbol) is displayed.

As shown in FIG. 4, the winning board base plate 31 is fixed to the gaming board 15 below the special symbol starting port 21. The winning base board 31 has front and rear surfaces opened. A large winning opening 32 in the shape of a square tube is formed. This special winning opening 3
A flat door 33 is mounted on the front end face of the second pivotable pivotably about both horizontal shafts 34, and the front of the special winning opening 32 is closed when the door 33 is rotated vertically. Then, the door 33 is opened based on the fact that the door 33 pivots in a horizontal state in which it falls forward.

The door 33 is mechanically connected to a plunger of a special winning opening solenoid 35 (see FIG. 2) corresponding to a load. The special winning opening solenoid 35 corresponds to a drive source of the door 33, and as shown in FIG. 2, is electrically connected to a solenoid drive circuit 36 (corresponding to a drive unit) mainly composed of a plurality of transistors. It is connected. The main control device 23 is electrically connected to the solenoid drive circuit 36. The main control device 23 controls the drive of the solenoid drive circuit 36 based on the determination of the big hit, and opens and closes the door 33 (big hit operation). ).

A special winning opening sensor 37 is fixed in the special winning opening 32. The special winning opening sensor 37 is a special winning opening 3
2 to detect that a pachinko ball has won, and a winning signal S
It is composed of a proximity switch that outputs n and is electrically connected to the main controller 23.

As shown in FIG. 5, a square center cover 38 is fixed to the rear surface of the game board 15. A rectangular frame-shaped main set 39 is provided on the outer periphery of the center cover 38, and the right side of the main set 39 is rotatable with respect to the front door 2 via a vertical axis (not shown). It is installed. These front door 2 and main set 3
A hook and a pin (both not shown) are attached to 9, and the main set 39 is locked in a closed state located on the outer peripheral portion of the center cover 38 based on hooking the hook on the pin.

The ball tank 4 is provided at the upper end of the main set 39.
0 is fixed. The ball tank 40 is in the shape of a container having an open upper surface, and pachinko balls are stored in the ball tank 40. Also, a tank rail 41 having an inclined gutter shape and a dispensing case 42 are fixed to the main set 39. The dispensing case 42 is connected to the inside of the ball tank 40 via the tank rail 41, and the dispensing case 42
A pachinko ball is supplied from inside the ball tank 40 through the tank rail 41.

In the payout case 42, a ball payout mechanism is housed. The ball payout mechanism uses a payout motor 43 corresponding to a load as a driving source. When the payout motor 43 is driven, the pachinko balls in the payout case 42 are discharged downward. Further, the main set 39 is provided with a ball passage (not shown). The upper end of this ball passage is connected to the inside of the payout case 42, and the pachinko balls released from inside the payout case 42 fall in the ball passage. The ball path is connected to both the payout port 7 of the upper plate 8 and the payout port 4 of the lower plate 5 when the main set 39 is closed. Dispensed into the upper plate 8 and the lower plate 5 through the outlet 7 and the payout port 4 of the lower plate 5.

As shown in FIG. 2, the payout motor 43 has
A motor drive circuit 44 corresponding to a drive unit is electrically connected. The motor drive circuit 44 mainly includes a plurality of transistors, and is electrically connected to a payout control device 45 (corresponding to a control unit) mainly including a microcomputer. This payout control device 4
Reference numeral 5 denotes a CPU, a ROM, a RAM (not shown), etc., which drives the payout motor 43 based on driving control of the motor drive circuit 44, and moves the pachinko balls in the upper plate 8 or the lower plate. Pay out within 5.

The payout control device 45 is electrically connected to the main control device 23. The main control device 23 receives a special symbol start signal St from the special symbol start sensor 22 or a winning signal Sn from the special winning opening sensor 37. The payout command Sh is output to the payout control device 45 based on the detection.
Then, the payout control device 45 drives and controls the motor drive circuit 44 based on the payout command Sh, and pays out the pachinko ball.

On the upper plate 8, as shown in FIG.
A plurality of slits 46 are formed. A speaker 47 corresponding to a load is fixed behind the plurality of slits 46. As shown in FIG.
A speaker drive circuit 48 corresponding to a drive unit is electrically connected. The speaker drive circuit 48 mainly includes a plurality of transistors, and is electrically connected to a sound control device 49 (corresponding to a control unit) mainly including a microcomputer. This sound control device 4
Reference numeral 9 denotes a CPU, a ROM, a RAM (not shown), and the like, which controls the sound of the speaker 47 based on the drive control of the speaker drive circuit 48.

The speaker control device 49 is a main control device 2
The main controller 23 sets the sound command Ss according to the progress of the game, and outputs the sound command Ss to the speaker controller 49. Then, the sound control device 49 drives and controls the speaker drive circuit 48 based on the sound command Ss,
The speaker 47 outputs a sound effect corresponding to the sound command Ss.

A frame lamp cover 50 is fixed to the upper end of the front door 2 as shown in FIG.
As shown in FIG. 4, a corner lamp cover 51 is fixed to the upper left corner and the upper right corner. A plurality of lamps 52 (see FIG. 2) corresponding to the loads are housed in the frame lamp cover 50 and both corner lamp covers 51. As shown in FIG. Are electrically connected. The lamp drive circuit 53 mainly includes a plurality of transistors, and is electrically connected to a lamp control device 54 (corresponding to a control unit) mainly including a microcomputer. The lamp control device 54 has a CPU, a ROM, a RAM (not shown) and the like, and controls the light emission of the plurality of lamps 52 based on the driving control of the lamp driving circuit 53.

The lamp control unit 54 is a main control unit 23
The main controller 23 sets an illumination command Sr according to the progress of the game, and outputs it to the lamp controller 54. Then, the lamp control device 54 controls the driving of the lamp driving circuit 53 based on the illumination command Sr, and causes the plurality of lamps 52 to blink.

As shown in FIG. 5, a power supply board box 55 is fixed to the rear surface of the main set 39 at the lower left corner. In this power supply board box 55, FIG.
As shown in FIG. 1, a power supply board 56 is housed, and a power supply cord (not shown) is electrically connected to the power supply board 56. This power cord is a Taishima power supply (not shown)
The main power supply Vin of 24 V AC is supplied to the power supply board 56 through a power supply cord. A rectifier circuit 57 and a DC / D
C circuit 58 is mounted, and rectifier circuit 57 is connected to main power supply V
in is converted into a DC power supply Vout, and the DC / DC circuit 58 generates various drive power supplies Vcc having different voltage levels based on the DC power supply Vout.

As shown in FIG. 5, a main board box 59 and a payout board box 60 are fixed to the rear face of the main set 39, and a symbol board box 61, a sound board box 62, a lamp board are provided on the back face of the center cover 38. Box 63 is fixed. These main board box 59 to lamp board box 63 are configured based on a combination of a board case made of a steel plate located on the front side and a board cover made of a transparent synthetic resin located on the back side, Inside the main board box 59, inside the payout board box 60, inside the design board box 61, inside the sound board box 62
2, a main control board 64, a payout control board 65, a symbol control board 66, a sound control board 67, and a lamp control board 68 are housed in the lamp board box 63, as shown in FIG.

Main control board 64 to lamp control board 68
Is a multi-layer printed circuit board. On the rear surface of the main control board 64 to the lamp control board 68, as shown as a representative of the main control board 64 in FIG. 69 are formed.

Main control board 64 to lamp control board 68
Are formed with a ground layer 70 and a power supply layer 71 made of a printed pattern. These main control boards 64-
The ground layer 70 and the power supply layer 71 of the lamp control board 68 have a size corresponding to the entire area of the signal layer 69,
Power supply board 56 through its own board case and lead wires
Grounded. Also, the main control board 64 to
The power supply layer 71 of the lamp control board 68 is connected to the power supply board 56 via a lead wire, and various drive power supplies Vcc are supplied from the power supply board 56 to the main control board 64 to the lamp control board 68.

Main control board 64 to lamp control board 68
On the rear surface, a GND cover 72 is mounted from above the signal layer 69. Each of the GND covers 72 is formed by forming a transparent metal film 74 on the rear surface of a transparent resin sheet 73 having an insulating property. The resin sheet 73 is adhered to the rear surfaces of the main control board 64 to the lamp control board 68, The transparent metal film 74 is electrically connected to the ground layer 70 of the main control board 64 to the lamp control board 68. Each of these transparent metal films 74 is formed by evaporating tin oxide by a vacuum evaporation method, and has such a degree of transparency that the signal pattern of the signal layer 69 can be seen through the substrate cover from behind because the film pressure is extremely thin. . Note that the transparent metal film 74 corresponds to a ground layer, and has a size corresponding to the entire area of the signal layer 69.

As shown in FIG. 1A, the signal layer 69 of the main control board 64 is provided with the main control device 23 and the solenoid drive circuit 36, and the CPU 24, the ROM 25, and the RAM 26 of the main control device 23 are provided. The solenoid drive circuit 36 is inserted into the through hole 75 of the GND cover 72. The signal terminals of the main control device 23 and the solenoid drive circuit 36 are electrically connected to the signal layer 69 of the main control board 64, and the power supply terminal is connected to the ground layer 70.
The power supply is electrically connected between the power supply layer 71 and the main control device 23 and the solenoid drive circuit 36.

The payout control device 45 and the motor drive circuit 44 are mounted on the signal layer 69 of the payout control board 65, and the CPU, ROM, RAM and motor drive circuit 44 of the payout control device 45 are provided with through holes in the GND cover 72. 75. The signal terminals of the payout control device 45 and the motor drive circuit 44 are connected to the signal layer 69 of the payout control board 65.
And the power supply terminal is electrically connected between the ground layer 70 and the power supply layer 71.
The drive power supply Vcc is applied to the motor drive circuit 44 through the power supply layer 71 of the payout control board 65.

The symbol control device 30 and the LCD drive circuit 29 are mounted on the signal layer 69 of the symbol control board 66, and the CPU, ROM, RAM, LC
The D drive circuit 29 is inserted into the through hole 75 of the GND cover 72. The signal terminals of the symbol control device 30 and the LCD drive circuit 29 are connected to the signal layer 69 of the symbol control board 66.
The power supply terminal is electrically connected between the ground layer 70 and the power supply layer 71, and the symbol control device 30
A driving power supply Vcc is applied to the LCD drive circuit 29 through a power supply layer 71 of the symbol control board 66.

A sound control device 49 and a speaker drive circuit 48 are mounted on a signal layer 69 of the sound control board 67.
The CPU, ROM, RAM, and speaker drive circuit 48 of the sound control device 49 are inserted into a through hole 75 of the GND cover 72. The signal terminals of the sound control device 49 and the speaker drive circuit 48 are electrically connected to the signal layer 69 of the sound control board 67, and the power terminals are the ground layer 70 and the power layer 71.
The drive power supply Vcc is applied to the sound control device 49 and the speaker drive circuit 48 through the power supply layer 71 of the sound control board 67.

The signal layer 69 of the lamp control board 68 is provided with a lamp control device 54 and a lamp drive circuit 53. The CPU, ROM, RAM,
The lamp drive circuit 53 is inserted into the through hole 75 of the GND cover 72. The signal terminals of the sound control device 54 and the lamp drive circuit 53 are electrically connected to a signal layer 69 of the lamp control board 68, and the power supply terminal is electrically connected between the ground layer 70 and the power supply layer 71. The control device 54 and the lamp driving circuit 53 include a lamp control board 6
The driving power supply Vcc is applied through the eight power supply layers 71.

The main controller 23 and the solenoid drive circuit 36, the payout controller 45 and the motor drive circuit 44, the symbol controller 30 and the LCD drive circuit 29, the sound controller 49 and the speaker drive circuit 48, the lamp controller 54, The lamp drive circuit 53 has lead terminals of a main control board 64, a payout control board 65, and a symbol control board 6.
6, the sound control board 67 and the lamp control board 68 are inserted and mounted in through holes of the main control board 64 to
On the front surface of the lamp control board 68, lead terminals are connected to the signal layer 69,
It functions as a solder surface 76 for dipping (immersion soldering) on the ground layer 70 and the power supply layer 71.

The special symbol start sensor 22 and the special winning opening sensor 37 are electrically connected between the ground layer 70 and the power supply layer 71 of the main control board 64, and are connected to the special symbol starting sensor 22 and the special winning opening sensor 37. Is the main control board 64
, A driving power supply Vcc is applied.

As shown in FIG. 5, on the rear surface of the front door 2,
The firing board box 77 is located on the right side of the firing motor 10.
Are fixed in the firing board box 77, as shown in FIG.
As shown in FIG. 7, a firing control board 78 is housed. The firing control board 78 is electrically connected to the payout control board 65 via a lead wire, and the firing control board 78 is supplied with a main power supply Vin from the power supply board 56 through the payout control board 65.

The firing control board 78 includes a motor driving circuit 79.
Is installed. The firing motor 10 is electrically connected to the motor drive circuit 79 via a lead wire.
The motor drive circuit 79 detects that the firing handle 9 has been operated clockwise in FIG.
0 is applied to the drive power supply Vin.

According to the above embodiment, the main control board 64
Since the ground layer 70 and the transparent metal film 74 are provided on both front and rear surfaces of the signal layer 69, the amount of electrical exposure of the signal layer 69 to noise is reduced. This makes it difficult for external noise due to the electric charges of the pachinko balls or irregular radio waves to enter the signal layer 69, so that the noise resistance of the main control board 64 is improved, and the main control device 23 of the main control board 64 and the solenoid drive are driven. The malfunction of the circuit 36 is prevented.

Further, a GND cover 72 having a transparent metal film 74 was placed on the rear surface of the signal layer 69 of the main control board 64. Therefore, the main control board 64 sends the GND cover 7
Since the signal layer 69 can be inspected or the like by peeling off the second, the maintainability of the main control board 64 is improved.

A multilayer printed wiring board having a ground layer 70 formed therein was used as the main control board 64.
For this reason, since external noise is less likely to enter the ground layer 70, the noise resistance of the main control board 64 is further improved. Further, the ground layer 70 of the main control board 64 and the GN
Since the transparent metal film 74 of the D cover 72 is formed in a size corresponding to the entire area of the signal layer 69, the electrical exposure of the signal layer 69 to noise is further reduced, and the electromagnetic shielding effect is enhanced. For this reason, external noise is less likely to enter the signal layer 69, so that the noise resistance of the main control board 64 is further improved.

The board cover behind the main board box 59 and the GND cover 72 of the main control board 64
Is formed transparent, so that the signal layer 6 of the main control board 64 is formed.
9 can be seen from behind. For this reason, tampering of the signal layer 69 can be easily detected, so that security is enhanced.

Further, the ground layer 70 and the transparent metal film 74 of the main control board 64 were grounded to the metal part (board case) of the main board box 59. Therefore, the ground layer 7
0 and the electrical area of the transparent metal film 74 is increased,
The shielding effect of external noise is further enhanced. The above effects are the same for the payout control board 65, the symbol control board 66, the sound control board 67, and the lamp control board 68.

In the above embodiment, the transparent GND cover 72 is placed on the rear surface of the signal layer 69 of the main control board 64 to the lamp control board 68. However, the present invention is not limited to this. An opaque GND cover formed of a colored metal film may be covered. Further, in the above embodiment, a multilayer printed wiring board is used as the main control board 64 to the lamp control board 68. However, the present invention is not limited to this, and a double-sided printed wiring board may be used. In this case, it is preferable to form a ground layer and a signal layer on the front and rear surfaces of the double-sided printed wiring board, and to cover the GND cover 72 on the signal layer on the rear surface.

In the above embodiment, the signal layer 69 is formed on the rear surface of the main control board 64 to the lamp control board 68. However, the present invention is not limited to this. For example, the main control board 64 to the lamp control board 68 Signal layer 6 in front of
9, the signal layer 69 may be covered with a transparent GND cover 72 or an opaque GND cover from above. In the above embodiment, the lead terminals of the main controller 23 and the like are dip-soldered. However, the present invention is not limited to this. For example, reflow soldering may be used.

In the above embodiment, the signal layer 69 is sandwiched between the transparent metal film 74 of the GND cover 72 and the ground layer 70 based on the fact that the GND cover 72 covers the main control board 64 to the lamp control board 68. However, the present invention is not limited to this. For example, a signal layer and a pair of ground layers sandwiching the signal layer may be formed on a multilayer printed wiring board by a printed pattern.

Further, in the above embodiment, the present invention is applied to one kind of pachinko machine in which the big hit operation is performed in conjunction with the display of the big hit symbol, but the present invention is not limited to this. You may apply to three types of pachinko machines. In the former two types of pachinko machines, the pachinko ball performs an opening operation based on the pachinko ball entering the starting opening, and the pachinko ball wins in the V zone of the central role when the central role is opened. The central role performs a jackpot operation based on the action. The latter three types of pachinko machines open a special winning opening in conjunction with the display of the big hit symbol, and the big hit operation is performed based on the fact that the pachinko ball wins in the special winning opening when the special winning opening is opened. Will be

[0054]

According to the gaming machine of the present invention, the ground layer is provided opposite to both surfaces of the signal layer. This makes it difficult for external noise to enter the signal layer, thereby improving the noise resistance of the control board and preventing the control board from malfunctioning.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of the present invention (a is a perspective view showing an appearance of a main control board, and b is a cross-sectional view taken along an X-ray).

FIG. 2 is a block diagram showing an electrical configuration.

3A is a front view showing the entire configuration, and FIG. 3B is an X-view diagram showing the entire configuration in a state where an upper plate is removed.

FIG. 4 is a front view showing the game board;

FIG. 5 is a rear view showing the entire configuration.

[Explanation of symbols]

28 is a symbol display device (load), 35 is a special winning opening solenoid (load), 43 is a payout motor (load), 47 is a speaker (load), 52 is a lamp (load), and 64 is a main control board (control board). , 65 is a payout control board (control board),
66 is a symbol control board (control board), 67 is a sound control board (control board), 68 is a lamp control board (control board), 6
9 is a signal layer, 70 is a ground layer, 72 is a GND cover (cover), and 74 is a transparent metal film (ground layer).

Claims (4)

[Claims] 1. A game machine comprising a control board for driving and controlling a load, wherein the control board is provided with a ground layer facing both surfaces of a signal layer. 2. A control board, wherein a ground layer made of a printed pattern is formed facing one surface of the signal layer, and a ground layer made of a cover is covered facing the other surface of the signal layer. The gaming machine according to claim 1, wherein 3. The gaming machine according to claim 1, wherein the control board comprises a multilayer printed wiring board having at least one ground layer formed therein. 4. The gaming machine according to claim 1, wherein the two ground layers are provided so as to correspond to substantially the entire area of the signal layer.