JP2006255126A - Control board assembly for game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a foreign object from easily entering a connector opening from which a connector for the outside connection is exposed, and to securely prevent fraudulent access to the wiring pattern of a control board even if the entrance should be permitted in a control board assembly in which the control board of a game machine is stored. <P>SOLUTION: Connectors 701 and 702 for the outside connection are mounted on the control board MCB via a connector pedestal 600, and surrounding wall parts 371 and 372 surrounding connector openings 361 and 362 of a case lid 300 are closely attached to the connector pedestal to store the control board. Accordingly, fraudulent entry of a foreign object from the connector openings can be prevented, and even if the connector openings should be opened by force, entry of the foreign object to the wiring pattern can be prevented by a rib 605 formed in the periphery of the connector pedestal, so that the fraudulent access can be securely prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a control board assembly that is provided in a gaming machine such as a slot machine and accommodates a control board used for operation control of the gaming machine in a board case, and in particular, for preventing unauthorized access to the accommodated control board. The present invention relates to a control board assembly in which measures are taken.

  In gaming machines such as slot machines and pachinko machines, control related to game play, such as winning lottery and symbol display control, is performed by a control board called a main control board. In recent years, in addition to the main control board, there is a control board that performs substantial control relating to the appearance of balls using a control board called a sub-control board.

  In such a control board, a transparent board case that can be visually checked from the outside is used so that the ROM for storing the control program of the gaming machine is not illegally replaced or an illegal signal is not given to the wiring pattern. A technique for preventing unauthorized access to a control board by accommodating the board case and preventing the board case from being easily opened is known (see, for example, Patent Document 1).

  By the way, the main control board equipped in the slot machine or the like is, for example, another control board such as a sub control board, switches arranged on the front mask, a hopper device and a power supply device for paying out a winning medal to the player, etc. In order to be electrically connected to the devices via a harness, it is necessary to expose the connector connected to these devices to the outside through the opening of the substrate case. However, by inserting a foreign object such as a wire into the gap between the connector mounted on the control board and the opening of the board case through which the connector is inserted, the wiring pattern of the control board and the electronic parts such as the RAM are short-circuited. The problem is fraudulent behavior that runs games that are not appropriate.

  In response to such a problem, for example, Patent Document 2 discloses a substrate box device having a structure shown in FIG. This conventional board box device is composed of a cover body (901) and a base body (902) facing each other, and a surrounding wall (906) is formed around the connector opening (905) of the cover body (901). Yes. In addition, the wiring pattern of the control board (903) is divided into a connector arrangement region (908) and a circuit region (909), and a protective wall (907) is formed at the boundary on the lid (901) side that separates them. Yes. According to this conventional board box device, even if a foreign object such as a wire is inserted from the connector opening (905) to the inside, the cover (901) is formed by the surrounding wall (906) formed around the connector (904). ) Is prevented and its entry becomes difficult. Even if the clearance of the connector (904) is pierced to allow entry of foreign matter, unauthorized access to the circuit area (909) is prevented by the protective wall (907) surrounding the connector installation area (908). It becomes extremely difficult to prevent unauthorized actions such as short-circuiting the electronic components described above.

JP 2004-209238 A JP 2001-204941 A

  However, in the conventional board box device shown in FIG. 17, it is difficult to pry the connector opening (905) and allow foreign matter to enter inside by forming the surrounding wall (906), but it is extremely fine. There is a possibility that a thin foreign material may pass through the surrounding wall (906) and short-circuit the wiring pattern in the connector arrangement region (908).

  Further, in order to further protect internal electronic components and the like against the intrusion of foreign matter from the connector opening (905), the wiring pattern of the control board (903) is changed to a circuit area (909) and a connector arrangement area. Therefore, there is a problem in that the degree of freedom in designing the wiring pattern of the control board (903) is limited and the board box device must be made large. .

  The present invention has been made in view of such conventional problems, and in a control board assembly that accommodates a control board of a gaming machine, it is difficult for foreign matter to enter from a connector opening that exposes a connector for external connection, It is another object of the present invention to provide a control board assembly for a gaming machine that reliably prevents unauthorized access to the wiring pattern of the control board even if entry is allowed.

  In order to solve the above-described problem, the invention according to claim 1 is a game machine control board that accommodates a control circuit board equipped with required electronic components interposed between a case base and a case lid facing each other. In the assembly, the case lid is inserted with a connector mounted on the control circuit board and exposed to the outside, and surrounds the periphery of the connector opening and protrudes toward the control circuit board. In the state in which a wall portion is formed and closely contacted between the connector and the control circuit board and the case base and the case lid are closed to accommodate the control circuit board, the connector opening It is characterized by comprising a connector base member having an abutting surface with which the end portion of the wall portion formed at the periphery of the portion abuts without a gap.

  According to the control board assembly for a gaming machine according to claim 1, in a state in which the case base and the case lid are closed and the control circuit board is accommodated, the connector base is interposed between the connector and the control circuit board. The contact surface of the member and the tip of the wall formed at the periphery of the connector opening contact each other without a gap, thereby making it difficult for foreign matter to enter from the connector opening.

  A second aspect of the present invention is the gaming machine control board assembly according to the first aspect, wherein a rib projecting toward the case lid is formed around the connector base member. And

  According to the control board assembly for a gaming machine according to claim 2, even if the foreign body is allowed to enter through the space between the wall of the peripheral edge of the connector opening and the contact surface of the connector base member, the connector base member is Since the wiring pattern of the control circuit board is covered with the connector base member by being in close contact with the control circuit board, unauthorized access to the wiring pattern by foreign substances is prevented. In addition, since the ribs protruding around the connector base member prevent foreign matter from entering the inside of the case, unauthorized access to the wiring pattern is reliably prevented.

  As described above, according to the control board assembly for a gaming machine of the present invention, the case base and the case lid are closed and accommodated between the connector and the control circuit board when the control circuit board is accommodated. The contact surface of the connector base member and the tip of the wall formed at the periphery of the connector opening contact each other without any gap, thereby making it difficult for foreign matter to enter from the connector opening. Further, even if foreign matter is allowed to enter through the wall between the peripheral edge of the connector opening and the contact surface of the connector base member, the wiring of the control circuit board is caused by the connector base member being in close contact with the control circuit board. The pattern is covered with the connector base member, and unauthorized access to the wiring pattern by foreign matter is prevented. In addition, since the ribs protruding around the connector base member prevent foreign matter from entering the inside of the case, unauthorized access to the wiring pattern is surely prevented.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. First, a schematic configuration of a gaming machine including the board case of the present invention will be described by taking a slot machine as an example. Here, FIG. 1 is a front view showing the appearance of the slot machine, and FIG. 2 is a view showing the internal structure of the slot machine with the front door opened.

  First, the external structure of the slot machine SM will be described with reference to FIG. In the slot machine SM, a front door FD forming a so-called front panel is attached so as to be openable and closable with respect to a housing (MB) which is a substantially rectangular box. The front door FD is roughly divided into an upper panel portion UP and a lower panel portion LP designed to enhance the visual effect, and these are integrally formed of hard plastic. In addition, a tray unit TU in which a tray portion for storing medals is formed is provided below the front door FD.

  An upper lamp UL and a side lamp SL incorporating a high-intensity light emitting diode are disposed on the peripheral portion of the upper panel portion UP. In addition, sound emitting units SAL and SAR for production that have built-in speakers and generate sound effects related to games are arranged on the left and right of the upper panel unit UP, respectively. In addition, a liquid crystal display unit FPD as an effect display device that mainly displays an image related to the effect of the game is disposed between the effect sound emitting units SAL and SAR.

  Further, a panel unit PU having a flat panel surface is attached to the upper panel portion UP, and a substantially rectangular transparent display window FW is formed at the center thereof. Each of the reels R1, R2, and R3 viewed through the display window FW has a cylindrical shape and can be independently rotated, and three reels are arranged in the axial direction in the housing. The player can visually check the three symbols in the vertical direction and the three rows in the horizontal direction through the display window FW among the plural types of symbols arranged on the outer peripheral surface of each reel R1, R2, R3.

  Between the upper panel portion UP and the lower panel portion LP, an operation console OPT on which switches for performing a game operation are arranged is integrally formed. The console OPT is provided with a medal insertion part MD having an insertion slot for inserting medals, a bet button BET, a start lever STL, and stop buttons STB1, STB2, and STB3.

  The bet button BET is a button switch for presenting the number of medals to bet on one game of the slot machine. The slot machine SM rotates the reels R1, R2, and R3 all at once when a bet is placed on the game by pressing any one of the bet buttons BET and the start lever STL is tilted. At this time, the slot machine SM performs winning lottery by internal processing. Then, the corresponding reels R1, R2, and R3 are stopped by pressing the stop buttons STB1, STB2, and STB3, respectively. When all the reels are stopped and the combination of symbols displayed on the active line set in the display window FW coincides with the winning combination won by the internal lottery, the winning is determined.

  The lower panel LP is provided with a display panel DP for displaying a picture of an appearing character and the like so that the player can recognize the model type of the slot machine SM. The saucer unit TU arranged below the lower panel portion LP has a medal payout port MEX for discharging medals to the saucer portion at the time of winning, etc., and an effect sound emitting portion SAB that has built-in speakers and produces effect sound effects. Are arranged respectively.

  Next, the internal structure of the slot machine SM will be described with reference to FIG. A main control board assembly MCA for housing a main control board MCB that controls the overall operation of the slot machine SM in a board case 100 is attached to the upper part of the back plate in the housing MB. The main control board MCB is a control circuit board formed on the basis of a microcomputer including MPU, ROM, RAM, etc., and is accommodated in a board case 100 which is a transparent plastic case.

  A reel unit RU including reels R1, R2, and R3 is provided in the center of the housing MB. The reel unit RU has a predetermined height in the housing MB so that when the front door FD is closed on the housing MB side, the reels R1, R2, and R3 face the display window FW formed in the panel unit PU. It is positioned and attached to a fixed frame. Each reel R1, R2, R3 is rotationally driven by a stepping motor connected to the respective central axis. At the top of the reel unit RU, a rotating device board (not shown) for sending a four-phase driving pulse signal to each stepping motor is attached, and the main control board MCB applies a rotating drive (excitation) pulse to the rotating device board. By sending data, the reels are controlled to rotate, brake and stop.

  Below the reel unit RU, medals inserted from the medal insertion unit MD are stored, and a hopper device HPU that discharges medals from the medal discharge port MEX at the time of winning a prize, and spilling medals overflowing from the hopper device HPU are accommodated. An auxiliary storage unit MST and a main power supply device PWU that distributes power to each device built in the slot machine SM are provided.

  Speakers SPL and SPR are attached to the upper surface of the rear surface of the front door FD so as to face the sound emitting portions SAL and SAR for effects described above. Although not shown in FIG. 2, a liquid crystal display unit FPD is attached between the speakers SPL and SPR, and a sub-control board SCB for controlling and driving the liquid crystal display unit and the like is transparent on the back side of the liquid crystal display unit. It is accommodated and attached to the substrate case. Sub-control board SCB is a display control of effect video by liquid crystal display unit FPD, illumination control using upper lamp UL and side lamp SL, and effect sound effect control using effect sound emission parts SAL, SAR, SAB Etc., mainly control related to the production of the game.

  Below the sub-control board SCB, a panel unit PU having a transparent display window FW for allowing the reels R1, R2, and R3 to be seen on the front surface is attached. Operation of the cold cathode fluorescent lamp CFL, the start lever STL, the stop buttons STB1, STB2, STB3, etc. for irradiating the outer peripheral surfaces of the reels R1, R2, R3 to brightly display the symbols on the back side of the panel unit PU A central display board CDB that functions as a relay board for transferring the output signals of the switches to the main control board MCB is provided and formed as a unit.

  A medal sorting device MSU is attached below the panel unit PU. The medal sorting device MSU is a device that determines and distributes the suitability of medals inserted into the medal insertion unit MD. The medal sensor built in the medal sorting device MSU detects a regular medal inserted in the medal insertion unit MD and sends a detection signal to the main control board MCB.

  Below the medal sorting device MSU, a guide member G1 that guides the regular medals sorted by this to the hopper device HPU, and medals (or foreign matter) removed by the medal sorting device MSU are guided to the medal discharge port MEX. A guide member G2 is provided. In addition, a guide member G3 that guides medals discharged from the discharge port of the hopper device HPU to the medal discharge port MEX is provided at the lower back of the front door FD. Further, a speaker SPB is mounted adjacent to the medal discharge port MEX so as to face the above-described effect sound emitting unit SAB.

  The slot machine SM configured as described above enters a standby state when a prize is won in the previous game and the payout of medals is completed, or when a loss is confirmed in the previous game. By pressing the bet button BET in this standby state, a medal is bet on the game from the medal (credit) stored inside, and the game starts. When the start lever STL is tilted in the game start state, the main control board MCB rotates the three reels R1, R2, and R3 all at once. At the same time, the winning combination is internally drawn, and the result is stored in a flag (internal lottery flag).

  Next, when the player presses the stop buttons STB1, STB2, and STB3 in an arbitrary order, the main control board MCB sequentially stops the corresponding reels accordingly. When it is detected that all the reels R1, R2, and R3 have stopped, it is determined whether or not the symbol displayed on each reel matches the symbol combination related to the winning combination corresponding to the flag. When the symbols related to the winning prize are displayed on the active line and the winning is confirmed, a medal with a predetermined number of dividends is added to the number of credits according to the type of the winning prize, and the number of medals to be credited is determined. When the upper limit value is exceeded, the hopper device HPU is driven to pay out a considerable number of medals to the tray portion of the tray unit TU, thereby paying the player a prize medal.

  Next, a substrate case 100 that accommodates the main control board MCB of the slot machine SM and a main control board assembly MCA using the same will be described. Here, FIG. 3 is a perspective view showing the external appearance of the main control board assembly MCA according to the present invention, FIG. 4 is an exploded perspective view showing the configuration, and FIG. 5 is an exploded perspective view of the board case 100 viewed from the back. is there.

  Referring to these drawings, the main control board assembly MCA includes a main control board MCB, and a case base 200 and a case lid 300 which are opposed to each other and sandwich the main control board MCB. The substrate case 100 includes a case base 200 and a case lid 300, and the main control board assembly MCA has the case base 200 on the back side and the case lid 300 in front via a pair of left and right bracket members BRa and BRb. It is arranged on the side and attached to the inner surface of the back plate of the housing MB.

  The first bracket member BRa located on the left side in FIG. 4 includes a flat plate portion 10 that faces and holds the back surface of the substrate case 100, and a side wall portion 11 that stands forward along the left edge of the flat plate portion 10. , And a support base portion 12 erected forward from the lower edge of the flat plate portion 10, and these are integrally formed of hard plastic. The flat plate portion 10 is appropriately formed with a number of bolt holes 10a through which a mounting bolt for mounting and fixing to the back plate of the housing MB (see FIG. 2) of the gaming machine is inserted at a predetermined position. A fitting recess 306 (see FIG. 5) formed on the side of the case lid 300 of the substrate case 100 is fitted inside the side wall portion 11 to stably hold the substrate case 100. 11a is formed in two places at the top and bottom.

  The second bracket member BRb located on the right side in FIG. 4 is integrally formed of a hard plastic like the first bracket member BRa, and the flat plate portion 20 facing the back surface of the substrate case 100; A side wall portion 21 standing on the right edge of the flat plate portion 20, a step portion 21a formed inside the side wall portion 21, and two columnar support pillar portions 23 that are implanted in the step portion 21a and extend forward. A plurality of (for example, four) cylindrical openings 24 formed at positions close to the side wall portion 21 of the flat plate portion 20, and a hook-like locking projection 25a extending forward from the upper edge of the flat plate portion 20 and inside the tip. And a support base portion 22 erected forward from the lower edge of the flat plate portion 20 so as to face the locking arm 25. The upper surface of the locking arm 25 is a surface that is elastically compressed when it is opened outward, and a rib 25b is formed along the elastic compression direction. Further, the upper surface of the support base portion 22 is formed flat so as to place and support the lower outer edge of the substrate case 100.

  The cylindrical opening 24 of the bracket member BRb constitutes one of illegal detachment preventing means as an engaging means for detachably mounting the substrate case 100, and a cylindrical connection member 500 described later is inserted into the engagement. An engagement recess (24a) for engaging the projections (502, 504) is formed on the inner wall of the cylindrical container. The flat plate portion 20 is formed with bolt holes 20a for attachment similar to the first bracket member BRa at appropriate locations.

  Note that the flat plate portions 10 and 20 of the first and second bracket members BRa and BRb may be integrally formed so as to be flush with each other, and the substrate case 100 may be attached by one bracket member.

  Next, the case base 200 constituting one side of the substrate case 100 has a substantially rectangular box shape whose front side is open and is integrally formed of transparent plastic. Then, the main control board MCB is fixed to the bottom plate 203 formed with the ribs via screws (not shown) (see FIG. 4).

  On the lower side wall 204 of the case base 200, hinge bearings 201 are formed at three locations at predetermined intervals to be swingably connected to the case lid 300 (see FIG. 4). More specifically, the lower side wall 204 of the case base 200 is formed to be slightly inwardly shifted from the lower side end of the bottom plate 203, and the arc-shaped hinge bearing 201 that opens downward is lower than the lower side end of the bottom plate 203. Each is formed at a position recessed upward.

  Further, at both ends of the upper side wall of the case base 200, a locking arm 202 having a locking hole 202a at the tip and elastically deformable in the vertical direction is formed.

  Further, on the upper side wall of the case base 200, two connection member holding portions 210 (unauthorized opening prevention means) for holding a square connection member 400 for detachably engaging the case lid 300, and a cylindrical shape are provided. A cylindrical opening 240 having a bottomed cylindrical container shape into which the connection member 500 is inserted to engage the case lid 300 and a cylindrical container opening 250 for storing the spare connection member 500 are formed. . The case base 200 and the case lid 300 are engaged with each other in a non-detachable manner mainly through a rectangular connecting member 400. However, even if the cylindrical connecting member 500 is inserted into the cylindrical opening 240, the case base is supplementarily provided. The members can be engaged with each other. The auxiliary engagement means may be used, for example, when the board case 100 is once opened in a game store and the operation of the internal main control board MCB is checked, and then the main control board assembly MCA is returned to the manufacturer. The cylindrical opening 240 is used when the substrate case 100 is resealed so that important electronic components such as the ROM of the main control board MCB are not stolen during the transportation.

  The case lid 300 constituting the other side of the substrate case 100 has a substantially rectangular box shape whose back side is open, and is integrally formed of a transparent plastic. The lower portion of the case lid 300 has a double-wall structure including an outer wall 302 and an inner wall 307, and a plurality of hinge shafts 301 are aligned with the hinge bearing 201 of the case base 200 at the end of the inner wall 307. It is formed (see FIG. 5). When assembling the substrate case 100, the case cover 300 and the case base 200 can be freely opened and closed by fitting the hinge shaft 301 of the case cover 300 into the hinge bearing 201 of the case base 200 at an angle within a predetermined range. Connected.

  Locking protrusions 303 are formed on both ends of the upper side wall of the case lid 300, respectively. The case lid 300 is closed by swinging to the case base 200 side, the locking arm 202 of the case base 200 is elastically deformed, and the locking hole 202a is locked to the locking projection 303, thereby closing the case members. State is to be maintained.

  In addition, on the upper side wall of the case lid 300, a rectangular tube opening 310 with a bottom that opens in a square shape so that the rectangular tube portion 410 of the connection member 400 can be inserted is formed at two locations via connecting portions 312. Yes (means to prevent unauthorized opening). Although details will be described later, an engagement recess 311 that can be engaged with the engagement protrusion 412 of the square tube portion 410 of the inserted connection member 400 is formed on the inner wall of the square tube opening 310.

  Further, on the upper side wall of the case lid 300, a cylindrical opening 340 for opposingly engaging with the cylindrical opening 240 on the case base 200 side through the connection member 500 and a cylinder on the case base 200 side are also provided. Opposite to the container opening 250, a cylindrical container opening 350 for storing the spare connection member 500 is formed through the coupling parts 342 and 352, respectively.

  When the case lid 300 is closed to the case base 200, the surrounding wall portion 319 including the connection member holding portion 210 and the square tube opening portion 310 together, and the surrounding wall portion 349 surrounding the cylindrical openings 240 and 340, A surrounding wall portion 359 surrounding the cylindrical container openings 250 and 350 is formed on the upper side wall of the case lid 300, respectively.

  Here, with reference to FIG. 5 and FIG. 6 which is a partially enlarged view of the case lid 300, the structure of the surrounding wall portion 319 will be described. That is, the surrounding wall portion 319 is formed on the case lid 300 as an outer wall surrounding the outer peripheral edge of the rectangular tube opening 310 with a predetermined gap, and the side facing the connecting member holding portion 210 is an opening. When the case lid 300 is closed to the case base 200, the connection member holding portion 210 is fitted into the square tube opening 310 through this opening, thereby connecting the square tube opening 310 and the connection member holding portion 210 to each other. It includes a form surrounding the unauthorized opening prevention means (engagement means). In addition, one side wall of the surrounding wall portion 319 is an inclined wall surface 320 that gradually increases in thickness from the front side to the back side. The surrounding wall portion 319 having such a structure prevents unauthorized access to the unauthorized opening prevention means from the outside, and makes it difficult to perform unauthorized actions such as destroying the engaged state using a cutter or the like. Moreover, even if a hole is opened from the side of the inclined wall surface 320 by a drill or other unauthorized tool and the unauthorized opening prevention means is destroyed, the trace such as the drilling can be easily seen from the front side. You can quickly discover the facts.

  In addition, the surrounding wall part 349 surrounding the cylindrical openings 240 and 340 and the surrounding wall part 359 surrounding the cylindrical container openings 250 and 350 are also formed to prevent unauthorized access to the openings from the outside. .

  Further, when the substrate case 100 is attached to the bracket members BRa and BRb, a cylindrical opening 330 that opens to face the cylindrical opening 24 of the bracket member BRb is formed on the side wall of the case lid 300 via the connecting portion 333, respectively. Yes (means to prevent unauthorized withdrawal).

  The circle in FIG. 6 shows a detailed cross section of the connecting portion 333 that connects the cylindrical opening 330 to the case lid 300 main body. As shown in the same circle, the connecting portion 333 is a thin portion having two parallel bar beams 333a and a surface facing the front face that spans the gap between the two beam portions 333a. It has a plate-like thin film portion 333b and is integrally formed. In terms of strength, the cylindrical opening 330 is cantilevered on the case lid 300 main body by the beam portion 333a of the connecting portion 333, while the connecting portion 333 can be cut using a tool such as a nipper. It is also required. In other words, the connecting portion 333 is designed with a cross-sectional area of the beam portion 333a or the like based on a strength balance that satisfies both of these conflicting requirements.

  Further, the bottom of the cylindrical opening 330 is connected to the case lid 300 main body including a part of the cylindrical opening 330 by the thin film portion 333b. Therefore, the region of the connecting portion 333 that is visually recognized from the front can be seen wider than before. It has become easier. In other words, by making it easy to see the cut state of the connecting portion 333 showing the desorption trace of the substrate case 100 from the front, unauthorized desorption of the substrate case 100 can be easily or reliably detected.

  Further, for example, the rectangular tube opening 310 shown in FIGS. 5 and 6 is also cantilevered by the case lid 300 main body by the connecting portion 312 having the same structure. Although not shown in the drawing, this connecting portion 312 is composed of a girder portion and a thin film portion, and the thin film portion increases the surface area of the connecting portion so that the cut state can be easily seen from the front. Since it has an operational effect, it is a concept that falls within the same technical scope.

  A rectangular frame 304 surrounding the cylindrical opening 330 is formed on the side of the case lid 300 on which the cylindrical opening 330 is formed. A locking end 308 for locking the locking arm 25 of the bracket member BRb is formed on the upper end portion of the rectangular frame portion 304. Further, fitting protrusions 306 are formed at two upper and lower portions on the side wall of the case lid 300 on the opposite side where the cylindrical opening 330 is formed. In addition to these, the case lid 300 has connectors 701, 702, 703, and 704 that are mounted on the main control board MCB and are electrically connected to other control circuit boards and built-in devices via harnesses. Connector openings 361, 362, 363, and 364 are formed at corresponding positions.

  The main control board assembly MCA has a hermetically sealed structure to prevent entry of foreign matters such as wires from these connector openings. Here, FIG. 7 is an enlarged cross-sectional view of the structure of the connector mounting portion in a state where the main control board MCB is accommodated. FIG. 8 is a perspective view showing the shape of a partly cut surface of the connector base 600 that is in close contact between the connectors 701, 702, and 703 and the main control board MCB.

  Referring to these drawings, first, connector base 600 has openings through which lead electrode terminals of connectors 701, 702, and 703 for connecting to devices built in the gaming machine via harnesses are inserted to the board side. And the periphery of this opening is the connector support part 601,602,603 which closely contacts the bottom part of each connector. A case contact surface 604 is formed by a flat surface slightly higher than these openings in the peripheral portions of the connector support portions 601, 602, and 603. Further, the case contact surface 604 surrounds the periphery of the case contact surface 604. Ribs 605 projecting up and down are formed so as to be orthogonal to the vertical direction.

  As shown in FIG. 7, the connectors 701 and 702 are soldered to the wiring pattern of the main control board MCB with lead electrode terminals inserted through the openings of the connector base 600. At this time, in the connector base 600, the connector support portions 601 and 602 are sandwiched between the bottoms of the connectors 701 and 702 and the main control board MCB, and the back surface of the case contact surface 604 is the wiring of the main control board MCB. It is fixed so as to cover a part of the pattern.

  On the other hand, surrounding wall portions 371 and 372 projecting toward the main control board MCB are formed on the peripheral edges of the connector openings 361 and 362 of the case lid 300, respectively. In the state where the board case 100 accommodates the main control board MCB, The tip portions of the portions 371 and 372 are in contact with the above-described case contact surface 604 of the connector base 600 without a gap.

  As described above, in the state in which the board case 100 accommodates the main control board MCB, the connector openings 361 to 363 are sealed while the connectors 701 to 703 are exposed to the outside, and foreign objects such as wires are illegally infiltrated from between them. It becomes difficult to make it. Further, even if the connector openings 361 to 363 are pry open to allow entry of foreign matter, unauthorized access such as short circuit or improper signal application to the wiring pattern covered by the connector base 600 is prevented. In addition, since the rib 605 protruding around the connector base 600 prevents foreign matter from entering further inside, it is possible to reliably prevent illegal acts on the wiring pattern and electronic components of the main control board MCB.

  Further, by forming the rib 605 on the connector base 600, thermal deformation such as warping or bending of the connector base 600 can be made minute during a heat treatment process such as reflow (soldering) on the main control board MCB. Therefore, it is possible to have an advantageous effect that the connection failure of the connectors 701 to 703 does not occur.

  The other connectors 704 and 705 provided in the main control board assembly MCA are also mounted on the main control board MCB via the connector base 650, and the connector openings 364 and 365 are sealed.

  The main control board MCB is equipped with a ROM that stores setting data related to the appearance of the slot machine SM and a program related to operation control. In this embodiment, the mounting position of such an important electronic component is the position of the board case 100. It is determined in relation to the structure. That is, as is apparent from the front view of the substrate case 100 shown in FIG. 9, the ROM is arranged in the vicinity where the unauthorized opening preventing means (310, 340) is provided. This is to prevent the case lid 300 and the case base 200 from being opened at a position close to the ROM or the like to prevent theft. Similarly, an important electronic component such as a ROM is arranged near the cylindrical opening 340 which is a preliminary opening prevention means to prevent the theft of the component during return transportation of the main control board assembly MCA. Yes.

  The board case 100 is assembled by mounting the main control board MCB to the case base 200 with screws and fitting the hinge shaft 301 of the case cover 300 into the hinge bearing 201 of the case base 200 at an angle within a predetermined range. And the case base 200 are connected to be freely opened and closed. When the case lid 300 is closed, as shown in FIG. 3, the locking hole 202a of the locking arm 202 on the case base 200 side and the locking projection 303 on the case lid 300 side are engaged. At this time, since the end portions of the peripheral walls of the case base 200 and the case lid 300 are in close contact with each other, the main control board MCB cannot be illegally accessed from the outside of the case using a wire or the like. .

  Further, simply closing the case lid 300 to the case base 200 only locks the locking arm 202 with the locking projection 303 by its elastic deformation force, and it can be easily opened by releasing these locking states. Is in a state. Accordingly, the connection member 400 is inserted into one or both of the connection members holding portions 210 of the case base 200, and the case base 200 is engaged with and connected to the rectangular tube opening 310 of the case lid 300 via the connection member 400. The main cover board MCB is accommodated in a state in which the case lid 300 is detachably connected and cannot be easily opened.

  The unauthorized opening preventing means as the engaging means for detachably engaging the substrate case members will be described in detail below. 10 is an external perspective view of the connection member 400 described above, FIG. 11 is an enlarged front view of the connection member holding portion 210 of the case base 200, and FIG. 12 is a longitudinal section of the connection member holding portion 210 in FIG. 13 and 13 are cross-sectional views of the connection member holding part 210 in FIG.

  First, referring to FIG. 10, the connecting member 400 is connected to the rectangular tube portion 410 and a bottom portion of the rectangular tube portion 410 and in one direction perpendicular to the axis of the rectangular tube portion 410 (up and down in the drawing). And a widened portion 420 having a substantially rectangular parallelepiped shape whose longitudinal direction is a direction), and these are integrally formed of hard plastic. The rectangular tube portion 410 is formed of a hollow and rectangular tube body 411, and the upper and lower surfaces of the tube body 411 are defined by U-shaped grooves 413 that leave one side, and projecting upward and downward, respectively. 412 is formed. The engaging convex portion 412 has a taper (a slope that gradually protrudes outward from the end toward the widened portion 420) on the insertion side of the rectangular tube portion 410, and the U-shaped groove 413 defines the cylindrical body 411. Elastic deformation is possible toward the inside.

  The widened portion 420 has a dimension that is wider than the width in the left-right direction of the rectangular tube portion 410, and the longitudinal direction thereof is longer than one side of the rectangular tube portion 410. As shown in FIG. 10, the left and right widened area surfaces on the front surface of the widened portion 420 and sandwiching the rectangular tube portion 410 are referred to as “widened surfaces” 421 here.

  11A shows an enlarged view of the connection member holding portion 210 before the connection member 400 is inserted, and FIG. 12A shows a longitudinal section along the line Av-Av shown in FIG. FIG. 13A shows a cross section along the line Ah-Ah shown in FIG. Referring to these drawings, the connection member holding portion 210 includes a pair of guide wall portions 212 facing each other from the upper side wall to the inside of the case (in the vertical direction in FIGS. 11 and 12), and a guide wall. The front end of the portion 212, that is, the end of each guide wall portion 212 on the side facing the case lid (300) (not shown) is bent at a substantially right angle so as to face each other, and has a locking convex portion 211 protruding inward. Is formed.

  The connecting member holding part 210 has dimensions and shapes determined in relation to the connecting member 400 so that the connecting member 400 can be held in a predetermined position and posture. That is, the above-described pair of guide wall portions 212 are parallel to each other at an interval corresponding to the width of the widened portion 420 of the connection member 400, and the locking projections 211 are opened inside the case base 200 and The protruding length of the stop convex portion 211 corresponds to the width of the widened surface 421 of the connection member 400. An insertion port 213 for inserting the connection member 400 into the connection member holding part 210 is formed at the end of the guide wall part 212 inside the case base 200.

  When the case lid 300 is engaged so as not to be detached, the connection member 400 is first inserted into the connection member holding portion 210. Here, FIG. 11B shows a front appearance of the connection member holding portion 210 in a state where the connection member 400 is inserted into a predetermined position that can be engaged with the rectangular tube opening (310) of the case lid, FIG. 12B shows a longitudinal section along the Bv-Bv line shown in FIG. 11B, and FIG. 13B shows a transverse section along the Bh-Bh line shown in FIG. 11B. As shown in these drawings, in order to insert the connection member 400 into the connection member holding portion 210, each widening portion 420 of the connection member 400 is guided from the inside of the case base 200 along the longitudinal direction thereof. It is inserted between 212 (insertion port 213), and the engaging part 410 is slid to the upper side wall of the case base body 200 in a state where the engaging part 410 protrudes from the gap between the respective locking convex parts 211. At this time, the both side surfaces of the widened portion 420 are sandwiched between the guide wall portions 212 and slidably guided, whereby the connecting member 400 is slid to a predetermined upper position while maintaining its posture (orientation).

  In the state in which the connection member 400 is inserted in a predetermined position in the connection member holding portion 210, the widening surface 421 of the connection member 400 abuts on the locking convex portion 211 protruding inward of the guide wall portion 212. Reference numeral 400 denotes a state in which the movement in the direction in which the case lid 300 is detached is restricted and prevented from coming off.

  Next, the details of the square tube opening 310 on the case lid 300 side, which is another component of the above-described unauthorized opening prevention means, will be described. Here, FIG. 14A is a longitudinal sectional view of the connecting member holding portion 210 of the case base 200 and the rectangular tube opening 310 facing the connecting member holding portion 210, and FIG. 14B is engaged and connected via the connecting member 400. It is a longitudinal cross-sectional view of the connection member holding | maintenance part 210 and the square tube opening part 310 showing a state.

  As described above, the rectangular tube opening 310 is formed in a container shape having a rectangular opening in alignment with the dimensional shape of the rectangular tube portion 410 so that the rectangular tube portion 410 of the connecting member 400 can be inserted and fitted. The case lid 300 is connected to the main body via a connecting portion 312 that can be cut using a tool such as a nipper. In addition, on the inner wall of the square tube opening 310, engagement concave portions 311 that are stepped portions having an enlarged diameter that can be engaged with the engagement convex portions 412 of the square tube portion 410 are formed at two locations, upper and lower. In addition, a surrounding wall portion 319 is extended on the upper side wall of the case lid 300 so as to surround the outer edge of the square tube opening portion 310.

  As shown in FIG. 14B, when the case lid 300 is closed to the case base 200, the rectangular tube portion 410 of the connecting member 400 is inserted into the rectangular tube opening 310 of the case lid 300. The engagement convex portion 412 of the connection member 400 once elastically deforms inward so as to follow the side surface of the rectangular tube portion 410, and when it reaches the engagement concave portion 311, it returns to the original protruding state and enters the engagement concave portion 311. Engage. On the other hand, on the case base 200 side, the widened portion 420 of the connecting member 400 is in contact with the locking convex portion 211 of the connecting member holding portion 210 and is prevented from coming off. Thus, since the unauthorized opening prevention means is engaged and connected inside the case base 200 and the case lid 300 via the connection member 400, these board case members can be separated from each other once in the engaged state. become unable.

  According to the unauthorized opening prevention means for connecting the substrate case members to each other, the case lid 300 and the case base 200 are opened unless the connecting portion 312 is cut and the rectangular tube opening 310 is separated from the case lid 300 main body. Can not be. In other words, when the substrate case 100 is opened to check the operation of the main control board MCB, it is intended to cut the connecting portion 312 to separate the square tube opening 310 from the case body. That is, when the state of the connecting portion 312 is viewed, it can be easily confirmed whether or not the substrate case 100 is opened. Further, since the connecting portion 312 of the rectangular tube opening 310 is formed with a wide area to be viewed from the front side, a large trace of the cutting is left, so that the fact of opening the substrate case 100 can be easily confirmed. it can.

  In addition, in the unauthorized opening preventing means of the present embodiment, the connecting member 400 is formed by including the rectangular tube-shaped square tube portion 410 and the substantially rectangular parallelepiped widened portion 420 wider than the rectangular tube portion 410, and the case On the base body 200 side, the both ends of the widened portion 420 are locked in a posture in which the longitudinal direction of the widened portion 420 is orthogonal to the upper side wall of the case base 200, so that the connecting member 400 is held so as not to come off. That is, since the connection member holding part 210 is provided with a relatively long locking region from the upper side wall of the case base 200 toward the inside of the case and holds the widened part 420 of the connection member 400, for example, illegally using a drill. Even if the locked state is to be released, the locked state cannot be released unless the case base 200 is completely destroyed.

  Further, by providing the case lid 300 with a surrounding wall portion 319 surrounding the rectangular tube opening 310 and the connecting member holding portion 210, unauthorized access from the outside to the unauthorized opening prevention means can be prevented, and a cutter or a drill can be used. Use it to make it more difficult to cheat such as destroying the engaged state. Even if a hole is opened by a drill or the like from the side of the surrounding wall portion 319 and the unauthorized opening prevention means is destroyed, traces such as perforations left on the inclined wall surface 320 can be easily seen from the front side. You can quickly discover the facts. Furthermore, if the unauthorized opening prevention means is destroyed until this locked state is released, the destruction traces are also enormous, so the fact of such illegal acts can be easily or quickly discovered, and the damage caused by this is minimized. To the limit.

  Next, the unauthorized detachment preventing means for attaching the substrate case 100 to the housing MB so as not to be detached via the bracket members BRa and BRb will be described. Here, FIG. 15 is an external perspective view of the connecting member 500 used for the unauthorized detachment preventing means, and FIG. 16 is a structure of the cylindrical opening 24 of the bracket member BRb and the cylindrical opening 330 on the case lid 300 side facing this. FIG.

  Referring to FIG. 15, the connecting member 500 has a hollow cylindrical body 501, and rotation restriction grooves 506 and 507 that are notched grooves having a predetermined width are formed at both ends of the cylindrical body 501. In the vicinity of each end of 501, a pair of engaging convex portions 502 and 504 that are defined by U-shaped grooves 503 and 505 that leave one side and project radially outward are formed.

  The engaging projections 502 and 504 have inclined surfaces that gradually protrude outward from the respective ends of the cylinder 501 toward the center, and are directed toward the inside of the cylinder 501 by the U-shaped grooves 503 and 505. And elastically deformable. Furthermore, the engaging convex portions 502 and 504 have tapered surfaces 502a and 504a in which corner portions in the counterclockwise direction when viewed from the respective end sides are cut out obliquely.

  The rotation restricting grooves 506 and 507 and the engaging projections 502 and 504 formed at both ends of the connecting member 500 are in a positional relationship in which the phase is shifted by about 90 degrees around the cylindrical axis of the cylindrical body 501. is there.

  Next, referring to FIG. 16, the cylindrical opening 24 formed in the flat plate portion 20 of the bracket member BRb has a cylindrical container shape, and one end of the connection member 500 is inserted into the inner wall thereof. At this time, the engagement recess 24a for engaging the engagement projection 504 (or the engagement projection 502) is formed as a stepped portion whose diameter is increased at two opposing positions. Two protrusions 24 b are formed on the bottom inner wall of the cylindrical opening 24.

  The cylindrical opening 330 on the case lid 300 side has a bottomed cylindrical container shape that opens toward the bracket member BRb, and is connected to the main body of the case lid 300 via a connecting portion 333. The connecting part 333 is composed of two girder parts 333a and a thin film part 333b spanning a gap between the girder parts 333a (see an enlarged view of FIG. 6). Engaging recesses 331 are formed at two opposing positions on the inner wall of the cylindrical opening 330, and protrusions 332 are formed at two opposite positions on the bottom inner wall of the cylindrical opening 330.

  The procedure for mounting the substrate case 100 assembled with the main control board MCB in an unremovable manner via the bracket members BRa and BRb is as follows. Here, the bracket members BRa and BRb are fixed in advance by inserting mounting bolts (not shown) through the bolt holes 10a and 20a and fastening them to the housing back plate of the gaming machine.

  First, one end of the connection member 400 is inserted into any cylindrical opening 24 formed in the bracket member BRb. At this time, the engaging convex portion 504 is once elastically deformed to the inside of the cylinder, then returns to the original protruding state, engages with the engaging concave portion 24a, and fits into the cylindrical opening 24. On the other hand, the case main body is moved toward the bracket member while the fitting protrusion 306 (see FIG. 5) formed on the side wall of the case lid 300 is fitted to the fitting recess 11a (see FIG. 4) of the bracket member BRa at an appropriate angle. The support column part 23 is inserted through the support hole 305 of the rectangular frame part 304. At this time, the other end of the connecting member 400 inserted into the cylindrical opening 24 of the bracket member BRb is inserted into the cylindrical opening 330 of the opposing case lid 300, and the engaging convex portion 502 is the cylindrical opening. The engagement recess 331 of 330 is engaged and fitted. Thereby, the substrate case 100 is attached to the bracket member BRb so as not to be detached. The board case 100 may be mounted on the bracket members BRa and BRb after the connection member 500 is first fitted into the cylindrical opening 330 of the case lid 300.

  The main body 100 of the main control board assembly MCA is supported by the flat plate portion 10, the side wall portion 11, the support base portion 12, and the flat plate portion 20 and the step portion 21a of the bracket member BRb, and the bracket member BRb. The locking projection 25a of the locking arm 25 is once elastically deformed outward and locked to the locking end 308 on the upper edge of the case lid 300 so that it is held by each part of the bracket members BRa and BRb. It is mounted stably (see FIG. 3). Further, since the bolt holes 10a and 20a for fixing the bracket members BRa and BRb to the housing are closed by the back surface of the case base 200, the board case 100 together with the bracket members BRa and BRb is used in the gaming machine unless the case base 200 is removed. It is not taken away from the case.

  When the substrate case 100 is removed from the housing for inspection of the main control board MCB, the connecting portion 333 of the cylindrical opening 330 into which the connecting member 500 is inserted is cut to separate the cylindrical opening. The substrate case 100 can be detached from the bracket member BRb.

  For example, when the gaming machine is shipped from the factory, the connection member 500 is inserted into the lowest cylindrical opening among the plurality of cylindrical openings 24 and 330, and the board case 100 is engaged and connected. Then, when inspecting the main control board MCB after installing a gaming machine in a pachinko hall or other gaming store, the connecting portion 333 is cut using a tool such as a nipper and the cylindrical opening 330 is moved to the bracket member BRb side. The substrate case 100 is removed from the housing while remaining.

  After the inspection, in order to return the substrate case 100 to the bracket members BRa and BRb and mount them, the connecting member 500 is inserted into the unused cylindrical openings 24 and 330 and engaged and connected. At this time, the spare connection member 500 stored in the cylindrical container openings 250 and 350 (see FIG. 4) may be used, but the connection member 500 is removed from the used cylindrical opening 330 that has lost its connection function. It may be taken out and reused.

  That is, when the cylindrical opening 330 left on the bracket member BRb side is rotated counterclockwise, the taper surface 502a (or 504a) of the connection member 500 is engaged with the engaging recess 331 (or 24) of the cylindrical opening 330 (or 24). 24a) Since they are brought into contact with the side stepped portion and elastically deformed and drawn in the radial center direction, these engagement states are released. In this state, the separated cylindrical opening 330 can be pulled out from the cylindrical opening 24, and the internal connection member 500 can be taken out.

  Each cylindrical opening 330 of the case lid 300 is provided with an alphabetic identification code in the order of, for example, A, B, C, D from the bottom, and the case lid is adjacent to each cylindrical opening. 300 is engraved on the front surface. When the substrate case 100 is removed and inspected as described above, the identification code of the re-engaged cylindrical opening 330 and the inspection history such as the inspection date, the name of the person inspecting, and the inspection result are pasted on the case lid 300. It is managed by writing on the attached inspection sheet.

  As described above, according to the main control board assembly MCA of the present embodiment provided in the gaming machine such as the slot machine SM, the connectors 701 to 705 for external connection are provided on the main control board MCB that controls the operation of the gaming machine. The connector openings 600-650 are mounted via the connector bases 600, 650, and the surrounding walls 371, 372 formed on the periphery of the connector openings 361-365 on the case lid 300 side are brought into close contact with the connector bases 600, 650. The connectors 701 to 705 are exposed to the outside through the opening. Therefore, it is difficult to intrude foreign objects such as wire illegally from the connector openings 361 to 365. Further, even if the connector openings 361 to 365 are pry open to allow the entry of foreign matter, the connector bases 600 and 650 cover the wiring pattern of the main control board MCB, so that it is illegal to apply a short circuit or improper signal. Access can be prevented. Further, since ribs 605 projecting around the connector bases 600 and 650 prevent foreign matters from entering further inside, illegal acts on the wiring pattern and electronic parts of the main control board MCB can be surely prevented.

  The board case 100 according to the present invention may contain not only the use of the main control board of the slot machine but also other control circuit boards such as a sub control board that mainly controls the production. Further, the present invention can also be applied to a control circuit board mounted on other game machines that operate by a microcomputer such as a pachinko machine or a ball ball game machine.

FIG. 1 is a front view showing an appearance of a slot machine according to an embodiment of the present invention. FIG. 2 is a front view showing the structure inside the housing by opening the front door of the slot machine according to the embodiment of the present invention. FIG. 3 is a perspective view showing the appearance of the main control board assembly according to the embodiment of the present invention. FIG. 4 is an exploded perspective view showing the configuration of the main control board assembly according to the embodiment of the present invention. FIG. 5 is an exploded perspective view of a substrate case according to an embodiment of the present invention as viewed from the back. FIG. 6 is an enlarged perspective view showing a part of the case lid according to the embodiment of the present invention. FIG. 7 is a sectional view showing the structure of the connector mounting portion of the main control board assembly according to the embodiment of the present invention. FIG. 8 is a perspective view including a partially cut surface of the connector base interposed between the main control board and the connector according to the embodiment of the present invention. FIG. 9 is a front view of a substrate case according to an embodiment of the present invention. FIG. 10 is an external perspective view of a connection member used for the unauthorized opening prevention means according to the embodiment of the present invention. FIG. 11 is an enlarged front view showing the connecting member holding portion of the unauthorized opening preventing means according to the embodiment of the present invention. FIG. 12 is a longitudinal sectional view of the connection member holding portion of the unauthorized opening preventing means according to the embodiment of the present invention. FIG. 13 is a cross-sectional view of the connection member holding portion of the unauthorized opening prevention means according to one embodiment of the present invention. FIG. 14 is a longitudinal sectional view of the unauthorized opening prevention means according to an embodiment of the present invention. FIG. 15 is an external perspective view of a connection member used in the unauthorized detachment preventing means according to one embodiment of the present invention. FIG. 16 is a cross-sectional view of an unauthorized detachment preventing unit according to an embodiment of the present invention. FIG. 17 is a cross-sectional view showing the structure of the connector mounting portion of the conventional board box device.

Explanation of symbols

SM ... slot machine, MCB ... main control board, MCA ... main control board assembly,
BRa, BRb ... Bracket member,
DESCRIPTION OF SYMBOLS 10 ... Flat plate part, 10a ... Bolt hole, 11 ... Side wall part, 11a ... Fitting recessed part, 12 ... Support stand part,
20 ... Flat plate part, 20a ... Bolt hole, 21 ... Side wall part, 22 ... Support base part, 23 ... Support pillar part,
24 ... Cylindrical opening, 24a ... Engaging recess, 24b ... Projection, 25 ... Locking arm,
100: substrate case, 200: case base,
201 ... Hinge bearing, 202 ... Locking arm, 202a ... Locking hole,
203 ... bottom plate, 204 ... lower side wall,
210: connecting member holding portion, 211 ... locking projection, 212 ... guide wall, 213 ... insertion port,
240 ... cylindrical opening, 250 ... cylindrical container opening,
300 ... case lid,
301 ... Hinge shaft 302 ... Outer wall 303 ... Locking protrusion 304 ... Rectangular frame part
305 ... Support hole, 306 ... Fitting protrusion, 307 ... Inner wall, 308 ... Locking end,
310 ... Square tube opening, 311 ... Engaging recess, 312 ... Connection part,
319 ... Enclosure, 320 ... Inclined wall,
330 ... Cylindrical opening, 331 ... Engaging recess, 332 ... Projection,
333 ... connecting part, 333a ... girder part, 333b ... thin film part,
340 ... cylindrical opening, 342 ... connecting part, 349 ... surrounding wall part,
350 ... cylindrical container opening, 352 ... connecting part, 359 ... surrounding wall part,
361-365 ... Connector opening, 371, 372 ... Enclosure,
400 ... connection member,
410 ... Square cylinder part, 411 ... Cylinder body, 412 ... engagement convex part, 413 ... groove,
420 ... Widened portion, 421 ... Widened surface,
500 ... connecting member,
501 ... Cylinder, 502 ... engagement convex part, 502a ... taper surface, 503 ... groove,
504 ... engaging convex portion, 504a ... tapered surface, 505 ... groove, 506, 507 ... rotation restricting groove,
600 ... Connector base, 601, 602, 603 ... Connector support, 604 ... Case contact surface,
605 ... Rib, 650 ... Connector base, 701-705 ... Connector,
901 ... Lid, 902 ... Base, 903 ... Control board, 904 ... Connector, 905 ... Connector opening,
906 ... Surrounding wall, 907 ... Protective wall, 908 ... Connector installation area, 909 ... Circuit area

Claims (2)

A control board assembly for a gaming machine that houses a control circuit board equipped with required electronic components interposed between a case base and a case lid facing each other,
The case lid is formed with a connector opening through which a connector mounted on the control circuit board is inserted and exposed to the outside, and a wall that surrounds the periphery of the connector opening and protrudes toward the control circuit board And
In the state where the case base and the case lid are closed and housed in the state where the control circuit board is accommodated between the connector and the control circuit board, the connector base is formed on the periphery of the connector opening. A control board assembly for a gaming machine, comprising a connector base member having an abutting surface with which a front end portion of a wall portion abuts without a gap. The control board assembly for a gaming machine according to claim 1, wherein a rib protruding toward the case lid is formed around the connector base member.

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