JP5745587B2 - Game machine - Google Patents

Description

  The present invention relates to a gaming machine such as a ball game machine or a slot machine that generates a big hit state by a lottery process caused by a gaming operation, and more particularly to a gaming machine having a board wiring pattern with improved noise resistance.

  A ball game machine such as a pachinko machine has a symbol start opening provided on the game board, a symbol display section for displaying a series of symbol variation patterns by a plurality of display symbols, and a big winning opening for opening and closing the opening and closing plate. Configured. When the detection switch provided at the symbol start port detects the passage of the game ball, the winning state is entered, and after the game ball is paid out as a prize ball, the display symbol is changed for a predetermined time in the symbol display section. Thereafter, when the symbol is stopped in a predetermined manner such as 7-7-7, a big hit state is established, and the big winning opening is repeatedly opened to generate a gaming state advantageous to the player.

  This type of gaming machine is generally based on a main control board that centrally controls game operations by executing a lottery process for determining whether or not to generate a big hit state, and control commands received from the main control board. It is divided into sub-control boards that execute typical game operations. Examples of the sub control board include an effect control board that executes a lamp effect and an audio effect, a liquid crystal display board that executes an image effect on a liquid crystal display, and a payout control board that pays out a prize ball.

  The main control board receives detection signals from a large number of detection switches arranged at a symbol start opening and the like, and drives a solenoid that opens and closes a prize winning opening and an electric tulip. In addition, a lottery result on whether or not to generate a big hit state using a plurality of light emitters (for example, 7 segment LED or LED lamp) arranged at appropriate positions on the surface portion of the gaming machine is appropriately displayed on the main control board. There is also a request for definite notification at a certain timing.

  As described above, a large number of important signals are input to the main control board, and a large number of important signals including control commands are output. In addition, since the signal input / output lines with the sub control board and game parts must be long to some extent, noise components superimposed on the signal lines may cause the computer circuit mounted on the main control board or sub control board to malfunction. There is.

  As the noise, for example, discharge noise associated with electrostatic discharge charged in the game ball can be considered. In addition, since a relatively large current flows intermittently through the big prize opening, the solenoid that opens and closes the electric tulip, and the plurality of lamps, high-frequency noise associated with this intermittent operation is superimposed on other signal lines. It will also be a thing. Since the main control board plays a very important role to supervise the gaming operation of the sub control board, the computer circuit must not malfunction, and its noise countermeasures are very important. In order to improve noise resistance, for example, it is conceivable that the main control board is formed of a multilayer board (for example, a four-layer board), a ground pattern is provided on one layer, and a power line pattern is provided on the other layer.

JP 2006-049376 A JP 2004-305777 A

  However, apart from the sub-control board, if a multi-layer board is adopted as the main control board that centrally controls gaming operations, it is easy to illegally modify it, and it is difficult to find it. Lack. Therefore, it is also conceivable to electrically isolate the connection connector arranged on the outer peripheral portion of the main control board and the computer circuit arranged inside the main control board by the partition line.

  However, when such a configuration is adopted, the ground area for the connection connector is inevitably limited. Therefore, depending on the pattern configuration, the ground potential of the connection connector fluctuates or changes in the pulse signal. Sometimes large ringing occurred. For this reason, the computer circuit of the main control board or the sub control board may malfunction, and typically, the control command may be garbled or the interrupt process due to malfunction may be started in the sub control board.

  In addition, it responds to a demand for lighting control of a large number of light emitters directly on the main control board without adversely affecting the computer circuit of the main control board and without complicating the board configuration and wiring between boards. A substrate configuration is also desired. Although there are proposals in Patent Document 1 and Patent Document 2, the object of the present invention cannot be achieved.

  The present invention has been made in view of the above requirements, and can effectively avoid malfunctions of the main control board and the like while suppressing the possibility of illegal modification, and can be controlled by direct control of the main control board. An object of the present invention is to provide a gaming machine capable of driving the light emitter.

In order to achieve the above object, the present invention executes a lottery process for determining whether or not a game state advantageous to a player is generated, and centrally controls a game operation based on the lottery result. And a power supply board that supplies a DC voltage to the main control board, wherein the main control board has a wiring pattern only on both the front and back sides of the printed board. For a double-sided board that does not exist, substantially all of the space except for the placement space of the electronic components, except for the signal pattern and power supply pattern on the board, and the ground pattern surface that is unified to the ground potential that is not partitioned by the partition line is, in the outer peripheral portion of the substrate of the main control board, the first sub-control board mounted with a computer circuit which operates based on a control command output from the main control board The second sub-control board, respectively, a first control connector and a second control connector is disposed for outputting a first control command and the second control command, the first control commands, first The second output circuit element that is supplied to the first control connector via the first output circuit element that is disposed in proximity to the control connector and the second control command is disposed in proximity to the second control connector. is supplied to the second control connector via, by providing the ground pattern surface that is unified set to the ground potential not partitioned by the partition wall lines, and each control connector, a circuit element corresponding thereto, wherein They are connected in the shortest state by the ground pattern surface.

  In the present invention, the game connector connected to the signal line that is likely to be a noise generation source is disposed close to the power connector, and a wide ground plane is secured, so that noise resistance is improved. Moreover, since a double-sided board is used, illegal modification is difficult.

  The voltage conversion circuit should preferably receive a DC voltage from the power connector through a noise filter. By adopting such a configuration, the power supply voltage of the computer circuit and the DC voltage supplied to the electromagnetic component and the detection sensor are separated, so that noise resistance is further improved.

  In the present invention, since a wide ground plane is ensured, a lighting connector that outputs a lighting signal to a light emitting body disposed at an appropriate position can be disposed on the outer periphery of the main control board. In addition, the lighting current flowing through the light emitter can be configured to flow out and inflow from the lighting connector, and a large number of lights can be directly emitted from the main control board without complicating the board configuration and wiring between boards. The body can be controlled to turn on. FIG. 4B illustrates the comparison circuit of the present invention. When a driving circuit is mounted on the game board relay board 29 as in the comparison circuit of FIG. 4B, in particular, the routing of the + 12V power line is complicated. On the other hand, FIG. 4C illustrates a comparison circuit provided with a partition line ISO. According to the comparison circuit of FIG. 4 (c), the complexity of the board configuration and wiring between boards can be avoided, but lighting control of a large number of light emitters cannot be performed, and if a large current is passed intermittently, The computer circuit of the main control board and the sub control board malfunctions due to an increase in resistance value and inductance value due to the narrow earth path (ground path).

  The lighting current is preferably generated by a DC voltage supplied from a power connector, and a noise filter should be disposed between the lighting connector and the voltage conversion circuit. According to this configuration, the noise resistance of the computer circuit is increased.

  The computer circuit of the main control board includes a one-chip microcomputer, a driver circuit that outputs a control command, and a control connector, and the one-chip microcomputer is far from the driver circuit with respect to the power connector. Placed in position. Optimally, the one-chip microcomputer should be placed at the most upstream position for the ground current flowing in the ground plane. If such a configuration is adopted, even if electromagnetic noise is generated in the vicinity of the driver circuit, the one-chip microcomputer is not easily affected.

  The one-chip microcomputer is preferably configured with a built-in random number generation unit, and the random number generation unit is configured for randomness for lottery processing based on a clock pulse received from a dedicated oscillation circuit and a switch signal received from a game connector. You should be generating numbers. By adopting such a configuration, it is possible to effectively eliminate illegal modification, and since there is no need to provide a separate random number generator, the ground plane can be expanded and the power line can be made thicker by the amount of free space. The noise resistance of the substrate is increased.

  According to the above-described present invention, it is possible to improve the noise resistance of the main control board while effectively suppressing the possibility of illegal modification. Also, a large number of light emitters can be driven by direct control of the main control board without adversely affecting the computer circuit.

It is a perspective view of the pachinko machine shown in an embodiment. It is the front view which illustrated in detail the game board of the pachinko machine of FIG. It is a block diagram which shows the whole structure of the pachinko machine of FIG. The arrangement relationship of each circuit block of the main control board is illustrated. It is a circuit diagram of the part which adjoins the power connector of the main control board. It is a circuit diagram of the part which adjoins the game connector of a main control board. It is a circuit diagram of the part which adjoins the lighting connector of a main control board. It is drawing explaining the operation | movement relevant to a control connector.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a front view showing a pachinko machine GM according to the present embodiment. The illustrated pachinko machine GM includes a rectangular frame-shaped wooden outer frame 1 that is detachably mounted on an island structure, and a front frame 3 that is pivotably mounted via a hinge 2 fixed to the outer frame 1. It consists of A game board 5 is detachably attached to the front frame 3 from the front side, and a glass door 6 and a front plate 7 are pivotally attached to the front side so as to be opened and closed.

  An upper plate 8 for storing game balls for launch is mounted on the front plate 7, and a lower plate 9 for storing game balls overflowing from or extracted from the upper plate 8 and a launch handle 10 are mounted at the bottom of the front frame 4. And are provided. The launch handle 10 is interlocked with the launch motor, and a game ball is launched by a striking rod that operates according to the rotation angle of the launch handle 10.

  An elliptical push button 11 with a built-in lamp is provided at the approximate center of the upper plate 8. The push button 11 is provided at a position where it can be operated with the left hand of the player, and the player can operate the push button 11 without releasing the right hand from the firing handle 10. This push button 11 does not function normally, but when the game state becomes, for example, a “button chance state”, the built-in lamp is turned on and can be operated.

  On the right side of the upper plate 8, an operation panel 12 for ball lending operation for the card-type ball lending machine is provided, a remaining amount display unit 12a for displaying the remaining amount of the card with a three-digit number, and a predetermined amount of game balls A ball lending switch 12b for instructing ball lending and a return switch 12c for instructing the return of the card at the end of the game are provided.

  As shown in FIG. 2, the game board 5 is provided with a guide rail 13 formed of a metal outer rail and an inner rail in an annular shape, and a liquid crystal color display DISP is provided at the approximate center of the game area 5a inside. The lottery result display section 14 by 7 segment LED and the two LED lamps 19 are arranged at the upper part.

  The liquid crystal display DISP is a part that functions as an effect symbol display unit that variably displays an effect symbol (for example, a three-digit effect symbol “7, 7, 7”) directly related to the special symbol related to the big hit state, and a background image And various characters are also displayed in animation. On the other hand, the lottery result display unit 14 functions as a special symbol display unit. After the blinking operation is performed in synchronization with the variation display operation of the liquid crystal display DISP, the lottery processing is performed in accordance with the stop operation of the liquid crystal display DISP. The result of success / failure is displayed deterministically.

  In this embodiment, the big hit state is divided into a probable big hit and a normal big hit, but the liquid crystal display DISP informs whether the probable big hit, normal big hit or lost by the arrangement of the production symbols in the stopped state. On the other hand, the lottery result display unit 14 notifies this by a predetermined stop pattern. Specifically, the liquid crystal display DISP has “7, 7, 7”, “6, 6, 6”, “2, 5, 2”, etc., depending on whether it is probable big hit, normal big hit or lost. The lottery result display unit 14 displays stop symbols of “77”, “66”, and “-” in the case where two 7-segment LEDs are provided, for example, when the effect symbols are stopped and displayed. The probability variation jackpot means a jackpot state in which a game in which the winning probability of the jackpot is increased (a game in the probability variation state) is started after the special gaming state similar to the case of the normal jackpot is completed.

  On the other hand, the two LED lamps 19 are portions that normally function as symbol display units. When a game ball that has passed through the gate 18 is detected, the display content fluctuates for a predetermined time. The success / failure state determined on the basis of the random number for lottery drawn at the time of passing is displayed. In this embodiment, when both of the two LED lamps are turned on and stopped, a hit state is obtained, and when one or two of the LED lamps are stopped in an unlit state, a lost state is obtained.

  As shown in FIG. 2, a design starting port 15, a big winning port 16, four normal winning ports 17, and a gate 18 that is a left and right passing port are arranged at appropriate positions in the game area 5 a of the game board 5. . Each of the winning holes 15 to 17 and the gate 18 has a detection switch inside, so that the passage of the game ball can be detected.

  In the present embodiment, the symbol start opening 15 is enlarged and reduced by an electric tulip having a pair of opening and closing claws, and is opened and closed when a hit display is made in a stopped state after the LED lamp 19 which is a normal symbol display portion changes. The nail is enlarged for a predetermined time. When a game ball wins the symbol start opening 15, the display symbols on the liquid crystal display DISP as the effect symbol display portion and the lottery result display portion 14 as the special symbol display portion change for a predetermined time, and It stops at the stop symbol determined based on the lottery result corresponding to the winning timing of the game ball.

  The big prize opening 16 is opened and closed by an opening / closing plate 16a that can be opened forward, but the symbols after the change stop of the production symbol display portion DISP are arranged such as “6, 6, 6”, “7, 7, 7”, etc. When it is an effect symbol ("66" or "77" is displayed on the lottery result display unit 14), a special game state called "big hit" is started, and the opening / closing plate 16a is opened.

  After the opening / closing plate 16a of the big prize opening 16 is opened, the opening / closing plate 16a is closed when a predetermined time elapses or when a predetermined number (for example, 10) of game balls wins. Such an opening / closing operation is continued as a big hit round, for example, up to 16 times, and is controlled in a state advantageous to the player.

  FIG. 3 is a block diagram showing an overall circuit configuration of the pachinko machine GM that realizes the above-described operations. As shown in the figure, this pachinko machine GM includes a power supply board 20 that receives AC 24V and outputs various DC voltages, a system reset signal SYS, etc., a main control board 21 that plays a central role in game control operations, and a main control board. An effect control board 22 that executes a lamp effect and a sound effect based on the control command CMD received from the control board 21; a liquid crystal control board 23 that drives the liquid crystal display DISP based on the control command CMD ′ received from the effect control board 22; Based on a control command CMD "received from the main control board 21, a payout control board 24 for controlling the payout motor M to pay out the game ball, and a launch control board 25 for firing the game ball in response to the player's operation, , It is structured around.

  However, in this embodiment, the control command CMD output from the main control board 21 is transmitted to the effect control board 22 via the command relay board 26 and the effect interface board 27. The control command CMD ′ output from the effect control board 22 is transmitted to the liquid crystal control board 23 via the effect interface board 27, and the control command CMD ″ output from the main control board 21 is the main board relay board. It is transmitted to the payout control board 24 via 28.

  The main control board 21, the effect control board 22, the liquid crystal control board 23, and the payout control board 24 are each equipped with a computer circuit including a one-chip microcomputer. Accordingly, the circuits mounted on the control boards 21 to 24 and the operations realized by the circuits are collectively referred to as a function. In this specification, the main control unit 21, the effect control unit 22, and the liquid crystal control unit 23 are used. , And the payout control unit 24. All or part of the effect control unit 22, the liquid crystal control unit 23, and the payout control unit 24 is a sub-control unit.

  By the way, the pachinko machine GM is roughly divided into a frame side member GM1 surrounded by a broken line in FIG. 3 and a board side member GM2 fixed to the back of the game board 5. The frame side member GM1 includes a front frame 3 on which a glass door 6 and a front plate 7 are pivotally attached, and a wooden outer frame 1 on the outside thereof. Is fixedly installed. On the other hand, the board side member GM2 is replaced in response to the model change, and a new board side member GM2 is attached to the frame side member GM1 instead of the original board side member. All except the frame side member 1 is the panel side member GM2.

  As shown in the broken line frame in FIG. 3, the frame-side member GM1 includes a power supply board 20, a payout control board 24, a launch control board 25, and a frame relay board 32, and these circuit boards are Each is fixed in place on the front frame 3. On the other hand, on the back of the game board 5, a main control board 21, an effect control board 22, and a liquid crystal control board 23 are fixed together with a liquid crystal display DISP and other circuit boards.

  And the frame side member GM1 and the board | substrate side member GM2 are electrically connected by the connection connectors T1-T4 concentratedly arranged in one place. In this embodiment, the connection connectors T <b> 1 to T <b> 4 are concentrated on the lower left side of the game board 5 when viewed from the back. Then, with the glass door 6 open, the left end of the game board 5 is locked to the front frame 3 from the front side of the front frame 3 to secure a rotation fulcrum, and the game board 5 is rotated around the secured rotation fulcrum. By doing so, the game board 5 is fitted inside the front frame 3. When the game board 5 is fitted, all the connection connectors T1 to T4 are connected, and the connection between the frame side member GM1 and the board side member GM2 is completed, and the pachinko machine GM is operable. .

  As shown in FIG. 3, the power supply board 20 is connected to the main board relay board 28 through the connection connector T2, and is connected to the power supply relay board 30 through the connection connector T3. The main board relay board 28 outputs the system reset signal SYS, the RAM clear signal CLR, the voltage drop signal ABN, the backup power supply BU, DC12V, and DC32V received from the power board 20 to the main controller 21 as they are. Similarly, the power relay board 30 also outputs the system reset signal SYS received from the power board 20 and the AC and DC power supply voltages to the effect interface board 27 as they are. The production interface board 27 outputs the received system reset signal SYS to the production control unit 22 and the liquid crystal control unit 23 as they are.

  On the other hand, the payout control board 24 is directly connected to the power supply board 20 without going through the relay board, and the system reset signal SYS, the RAM clear signal CLR, the voltage drop signal ABN, the backup, which are received by the main control unit 21. The power supply BU is directly received together with other power supply voltages.

  Here, the system reset signal SYS output from the power supply board 20 is a signal indicating that the AC power supply 24V is supplied to the power supply board 20, and the one-chip microcomputer or other IC element of each of the control units 21 to 24 by this signal. The power is reset. The RAM clear signal CLR received from the power supply board 20 by the main control unit 21 and the payout control unit 24 is a signal that determines whether or not to initialize all areas of the built-in RAM of the one-chip microcomputer of each control unit 21 and 24. Thus, it has a value corresponding to the ON / OFF state of the initialization switch operated by the attendant.

  The voltage drop signal ABN received from the power supply board 20 by the main control unit 21 and the payout control unit 24 is a signal indicating that the AC power supply 24V has started to drop. By receiving this voltage drop signal ABN, each control unit In 21 and 24, necessary end processing is started prior to a power failure or business end. The backup power source BU is a DC 5V DC power source that retains data in the built-in RAM of the one-chip microcomputer of the main control unit 21 and the payout control unit 24 even after the AC power source 24V is cut off due to business termination or power failure. Therefore, the main control unit 21 and the payout control unit 25 can resume the game operation before power-off after power-on (power backup function). This pachinko machine is designed to retain the stored contents of the RAM of each one-chip microcomputer for at least several days.

  On the other hand, the effect control unit 22 and the liquid crystal control unit 23 are not provided with the power supply backup function described above. However, as described above, the system reset signal SYS is commonly supplied to the effect control unit 22 and the liquid crystal control unit 23 via the power relay board 30 and the effect interface board 27. A power supply reset operation is realized at a timing substantially synchronized with the control units 21 and 24.

  As illustrated, the main control unit 21 transmits a control command CMD "to the payout control unit 25 via the main board relay board 28, while the payout control unit 25 receives a prize ball indicating a payout operation of the game ball. A count signal and a status signal CON relating to an abnormality in the payout operation are received, and the status signal CON includes, for example, a replenishment out signal, a payout shortage error signal, and a lower plate full signal.

  The main control unit 21 is connected to each game component of the game board 5 via the game board relay board 29. And while receiving the switch signal of the detection switch built in each winning opening 16-18 on a game board, solenoids, such as an electric tulip, are driven. The main control unit 21 is also connected to the symbol display board 33 via the game board relay board 29 to drive the LED group as a light emitter.

  The LED group that is lighted and driven in the main control unit 21 includes a 7-segment LED that constitutes the lottery result display unit 14 and two LED lamps that constitute the normal symbol display unit 19. In addition, since the display mode on the lottery result display unit 14 can be enriched and it can be applied to a gaming machine provided with two symbol start ports, two 7-segment LEDs are arranged in this embodiment. In addition, the main control unit 21 also directly displays an LED for displaying the number of lottery holds, the number of jackpot rounds, and the like that are in a standby state when a game ball passes through the gate 18 or the symbol start port 15 continuously. The lighting is controlled.

  FIG. 4A schematically shows the circuit configuration of the main control board 21. The main control board 21 is composed of a double-sided board having a wiring pattern only on both the front and back sides of the printed board. Further, both the front and back surfaces of the main control board 21 are substantially solid spaces except for the space for arranging the electronic components. Here, the solid ground plane means a ground plane in which all portions except the signal pattern and the power supply pattern on the circuit board are set to the ground potential.

  As shown in the figure, the main control board 21 includes a one-chip microcomputer 40, a first oscillation unit 41 that generates a system clock of the one-chip microcomputer 40, and a first random number generator used for lottery processing by the one-chip microcomputer 40. 2 oscillating unit 42, IO port circuit 43 through which input / output data of one-chip microcomputer 40 passes, output driver 44 that outputs control command CMD to effect control unit 22 to connector CN4, and detection switches SW1 to SW1 from connector CN3 An input buffer 45 that receives a switch signal of SWn and an interface circuit 46 with the payout control unit 24 are arranged.

  In addition to the ROM, RAM, counter circuit, timer circuit, watchdog timer, parallel input port, and serial communication circuit, the one-chip microcomputer 40 particularly includes a random number generation circuit. This random number generation circuit includes a random number counter that is updated by the output clock of the second oscillating unit 42 and a latch that holds the output value of the random number counter based on the switch signal of the detection switch SW disposed at the symbol start port 15. And a circuit. Therefore, the random number value generated by the built-in random number generation circuit is not likely to be synchronized with the system clock, and is not updated by software processing or exposed to the outside. There is no risk of illegal games due to illegal modifications on the wear.

  In addition, in the present embodiment, it is not necessary to provide a dedicated random number generation circuit on the main control board 21, and high security can be realized simply by providing the second oscillation unit 42. Can be secured. Therefore, in the present embodiment, the spare space is allocated to the thick power line and the solid ground surface. That is, the power supply voltage + 5V is supplied to each electronic circuit of the main control board 21 by the power supply line Vcc shown by a thick line in FIG.

  In this embodiment, the power supply line Vcc from the power input unit INP to the one-chip microcomputer 40 is not connected to a circuit such as the IO port circuit 43. That is, the noise resistance of the one-chip microcomputer 40 is improved by providing the one-chip microcomputer 40 with an almost dedicated power line.

  Next, other electronic elements mounted on the main control board 21 will be described. As the output driver 44, for example, a Schmitt trigger buffer (for example, SN74LV8151) that outputs a control command CMD having a length of 2 bytes together with a strobe signal having a length of 1 bit for each byte is used. The interface circuit 46 is also provided with a similar Schmitt trigger buffer that outputs a control command CMD ″.

  These Schmitt trigger buffers output a total of 9-bit digital data including a strobe signal, but a current of about 10 mA flows out of the H level output terminal, and a current of about 10 mA flows out of the L level output terminal. Flows in.

  On the other hand, as the input buffer 45, a dedicated interface IC (for example, 2STB155PP) in which the main control board side functions with a power supply voltage of 5V and the game board side functions with a power supply voltage of 12V is used.

  Further, on the outer periphery of the main control board 21, a first control connector CN1 that transmits and receives various signals to and from the payout control board 24, a power connector CN2 that receives a DC voltage and control signals SYS, CLR, and ABN from the power supply board 20, A game connector CN3 that transmits / receives switch signals and drive signals to / from game parts on the game board, a second control connector CN4 that transmits a control command CMD to the effect interface board 27, and a lighting that outputs a lighting control signal to the LED lamp group Connectors CN5 are arranged in a row along the outer periphery of the substrate.

  However, the connectors CN1 and CN2 are actually connected to the power supply board 20 and the payout control board 24 via the main board relay board 28 as shown in FIG. Similarly, the connector CN3 passes through the game board relay board 29, and the connector CN5 passes through the game board relay board 29 and the symbol display board 33, and electromagnetic solenoids, detection switches, or LEDs of game parts. Connected to lamp group. The connector CN4 is connected to the effect interface board 27 via the command relay board 26.

  The power connector CN2 has a function of connecting the power board 20 and the power input unit INP of the main control unit 21, and FIG. 5 shows a connection relationship between the power connector CN2 and the power input unit INP.

  As shown in FIG. 5, the power input unit INP includes an EMC (Electro-Magnetic Compatibility) filter Fi1, which is a noise filter in which two coils and a capacitor are T-connected, a smoothing capacitor Cin that receives DC 12V, a resistor, The filter includes a smoothing filter Fi2 having capacitors connected in parallel, a pull-up circuit Rup that receives control signals SYS, CLR, and ABN, and an RC filter Fi3 that includes a resistor and a capacitor.

  The backup power BU received from the power supply board 20 is supplied to the one-chip microcomputer 40 through the EMC filter Fi1. Further, the direct current 12V that passes through the smoothing capacitor Cin is supplied to the transistor array TA1 and the buffer 45, and is also supplied to the three-terminal regulator RG through the EMC filter Fi1. In the three-terminal regulator RG, the direct current 12V received from the power supply board 20 is stepped down to the direct current 5V and becomes the power supply voltage of each digital IC including the one-chip microcomputer 40. As shown in the figure, the EMC filter Fi1 is arranged upstream of the three-terminal regulator RG, so that noise superimposed on the DC 12V power line is effectively prevented from entering the main control board 21. Further, a large-capacity smoothing capacitor Cout is disposed downstream of the three-terminal regulator RG.

  The direct current 32V via the smoothing filter Fi2 is connected to the game connector CN3. On the other hand, the control signals SYS, CLR, ABN that have passed through the pull-up circuit Rup and the RC filter Fi3 are supplied to the one-chip microcomputer through the inverter circuit GT.

  FIG. 6 is a circuit diagram showing the relationship among the game connector CN3, the game board relay board 29, and the electromagnetic solenoids L1 and L2 and the detection switches SW1 to SWn of the game parts. As shown in the figure, the DC voltages 32V received from the power supply board 20 are supplied to the electromagnetic solenoids L1 and L2 via the smoothing filter Fi2 of the power input part INP. On the other hand, the driver DRV energizes the electromagnetic solenoids L1 and L2 by performing an ON operation based on the drive data DR1 and DR2 received from the one-chip microcomputer 40.

  The drive current flowing through the electromagnetic solenoids L1 and L2 is a relatively large current and flows intermittently, which may adversely affect the one-chip microcomputer 40 and the like. However, in this embodiment, the feedback current from the electromagnetic solenoids L1 and L2 to the driver DRV immediately flows into the ground terminal GND of the adjacent power connector CN2, so that the one-chip microcomputer 40 or the like located at the most upstream of the solid ground surface There is no adverse effect.

  The detection switches SW1 to SWn are configured with a built-in high-frequency oscillation circuit, and have a function of lowering the input impedance when the game ball passes through the detection coil constituting the high-frequency oscillation circuit. As shown in the figure, DC 12V is supplied to the detection switches SW1 to SWn having such a function through the pull-up resistor R. Therefore, when the detection switch is turned on, the L level detection signals SG1 to SGn are output from the buffer 45. Is obtained. Then, a pulsed ON current flows from the buffer 45 to the detection switch SWi, but this ON current flows into the ground terminal GND of the power connector CN2 via the ground terminal of the game connector CN3. Does not adversely affect one-chip microcomputers.

  FIG. 7 is a circuit diagram illustrating a circuit related to the lighting connector CN5. FIG. 7 shows a transistor array TA1 that receives the common data COMi from the one-chip microcomputer 40 and outputs DC 12 V, a transistor array TA2 that receives the lighting control data Di from the one-chip microcomputer 40, and an ON surface. A group of LED lamps arranged in place on the side and a resistor array RA that limits the current of each LED lamp are shown. The LED lamp group is composed of, for example, 8 × 8 LED lamps, and the LED lamps selected by the 8-bit common data COM0 to COM7 and the 8-bit lighting control data D0 to D7 are turned on. Become.

  The transistor array TA1 includes a D-type flip-flop and a current output unit. The common data COMi is latched by the D-type flip-flop corresponding to the write operation to the transistor array TA1, and + 12V is output to the output terminal corresponding to the H level common data COMi.

  On the other hand, the transistor array TA2 includes an open transistor type current input section. Therefore, the current input unit that has received the H level lighting control data Di flows about + 10V from the power input unit INP through + 12V → LED lamp → current limiting resistance, and the corresponding LED lamp is lit. It becomes.

  Therefore, for example, when all the LED lamps (for example, 8 × 8) are lit, the total lighting current flowing into the transistor array TA2 is at a considerable level (for example, 640 mA)). However, in this embodiment, since the solid ground plane is formed on the entire main control board 21, the total lighting current flows from the ground terminal of the transistor array to the ground terminal of the power connector CN2 through the lowest impedance path. As a result, no trouble occurs.

  On the other hand, for example, when a configuration in which a partition line ISO is provided in the vicinity of the connectors CN1 to CN5 to insulate the internal circuit, the control connector is used when the circuit configuration of the main control board is enhanced. There is a possibility that the ground terminal of CN4 may fluctuate or ringing may occur at the output terminal of control connector CN4.

  FIG. 4C is a diagram for explaining this point, and here, a comparison circuit provided with a partition line ISO in the vicinity of the connectors CN1 to CN5 is shown, and a portion illustrated by a shaded pattern Becomes the solid earth surface ER2 isolated outside the partition line ISO. As the circuit configuration of the main control board 21 is enriched, the outside of the partition line ISO has to be narrower. However, even in the comparison circuit of FIG. 4C, the game connector CN3, the second control connector CN4, and the game connector The portion of CN3 is slightly narrowed, and the resistance value of the earth line increases accordingly.

  In such a case, all of the lighting current (640 mA at the maximum) that causes the LED lamp group to emit light flows through the earth line ER2 outside the partition wall line ISO, so that the ground terminal of the control connector CN4 corresponds to the fluctuation of the lighting current. The potential of fluctuates not a little. On the other hand, in this embodiment, since the circuit configuration of FIG. 4A is adopted, the lighting current that causes the LED lamp group to emit light passes through the solid ground surface having a sufficient area and is grounded to the power connector CN2. Since it returns to the terminal, the potential of the ground terminal such as the control connector CN4 is not changed.

  Next, the advantages of the solid ground surface of the present embodiment will be further described in relation to the control connectors CN1 and CN4. In the case of the present embodiment, the driver 44 and the interface unit 46 that output the control commands CMD and CMD "are arranged close to the respective control connectors CN4 and CN1, and the ground terminals are connected in the shortest state through a solid ground. For this reason, the impedance (including inductance) of the transmission path of the control command CMD, CMD "is set as low as possible, and the bit of the control command due to ringing or the like, and the reception interrupt processing due to malfunction are effective. To be prevented.

  This point will be described based on the comparison circuit of FIG. In the comparison circuit, the solid ground surface is divided into an inner ground ER1 and an outer ground ER2 in the partition line ISO, and the inner and outer grounds ER1 and ER2 are connected and joined in the vicinity of the power connector CN2, for example. In such a case, the ground terminal of the driver 44 is connected to the inner ground ER1, while the ground terminal of the control connector CN4 is connected to the outer ground ER2.

  Therefore, among the currents flowing out from the H level output terminal in the control connector CN4, the current returning from the sub control board to the ground terminal of the control connector CN4 returns to the ground point of the three-terminal regulator RG through the narrow outer ground ER2. (See Fig. 8 (a)). Therefore, when the outer ground path is narrow, the potential of the ground terminal of the control connector CN4 varies not a little according to the variation of the output level.

  Further, for the current flowing into the L-level output terminal in the control connector CN4, a current path that goes around the outer ground ER2 from the inner ground ER1 and returns to the sub-control board can be considered (see FIG. 8B). For this reason, there is a risk of malfunction due to an increase in inductance or resistance value of the transmission path.

  On the other hand, in the present embodiment, the partition line ISO does not exist, and the shortest path is secured by the solid ground surface having a sufficient area, so that the possibility of malfunction of the computer circuit is effectively reduced.

20 Power supply board 21 Main control boards 24 and 27 Sub control boards CN1 and CN4 Control connector CN2 Power supply connector CN3 Game connector 45 Buffer DRV Driver RG Voltage conversion circuit

Claims (1)

A main control board equipped with a computer circuit that executes a lottery process for determining whether or not to generate a gaming state advantageous to a player and centrally controls gaming operations based on the lottery result, and the main control board A power supply board for supplying a DC voltage to the gaming machine,
The main control board is a double-sided board that has wiring patterns only on both the front and back sides of the printed board, and substantially all the spaces except for the electronic component placement space are separated from the board except for the signal pattern and the power supply pattern on the board. It is a ground pattern surface that is set to a ground potential that is not partitioned by line
In the outer periphery of the main control board,
A first control command and a second control command for a first sub-control board and a second sub-control board, each having a computer circuit that operates based on a control command output from the main control board, respectively. A first control connector and a second control connector for outputting
The first control command is supplied to the first control connector via the first output circuit element arranged close to the first control connector, and the second control command is close to the second control connector. Being supplied to the second control connector via the arranged second output circuit element ,
By providing a ground pattern surface that is uniformly set to a ground potential that is not partitioned by a partition line, each control connector and a corresponding circuit element are connected in the shortest state by the ground pattern surface. Gaming machine.