JP2008237342A - Illegal opening prevention mechanism for board case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illegal opening prevention mechanism for a board case which achieves a higher resisting force against attempts to illegal modification. <P>SOLUTION: The mechanism includes the first board case 50 which houses and hold a first circuit board 35 inside a case formed with the first case body member 51 and the first lid member 52 covering the first case body member; and the second board case 80 which houses and hold a second circuit board 38 inside a case formed with the second case body member 81 and the second cover member 82 covering the second case body member and is used with the first and second board cases 50 and 80 interlinked. The second board case 80 includes a second board case lock mechanism 90 which links the second case body member and the second lid member together to make the opening of the case impossible without breaking a rupture structure part for opening. At the same time, the first board case 50 can be opened by releasing the linkage between the first and second board cases 50 and 80 only when the second board case 80 is opened. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mechanism for preventing unauthorized opening of a board case that is used by being fixed inside a gaming machine in a state where a plurality of circuit boards are housed in the board case.

  A gaming machine such as a pachinko machine or a slot machine is provided with a liquid crystal display device, a game ball launching device, a reel unit, a ball paying device, a medal paying device, etc., and various circuit boards are provided depending on the controlled object and function. It is used. In recent years, it has become difficult to secure a space for mounting a substrate with an increase in the size of a liquid crystal display device and the advancement of control contents, and a configuration in which a plurality of circuit boards are arranged in layers is proposed (for example, a patent). Reference 1).

  On the other hand, circuit boards used in gaming machines such as those described above are generally fixed to gaming machines in a state where they are housed in a board case in order to provide a fair game by suppressing remodeling for the purpose of unauthorized gain. And used. For circuit boards that are particularly subject to unauthorized modification, the board case is made of a transparent resin material, and the case cannot be opened unless a part of the board case (breaking structure for opening) is broken. A case lock mechanism is provided so that it cannot be easily replaced with a circuit board that has been tampered with. In the unlikely event that tampering is performed, the manager of the amusement facility can Various unauthorized opening prevention mechanisms configured to allow the presence or absence of fraud by visually checking the state of the circuit board and the case lock mechanism have been proposed and already put into practical use (for example, Patent Document 2, Patent Reference 3).

Japanese Patent Laying-Open No. 2005-305133 JP 2003-340092 A JP 2006-020728 A

  However, in recent years, counterfeit technology on the side of fraudsters has become more sophisticated and organized, making it difficult to respond. In other words, a circuit board that has been tampered with in advance is housed in a board case without scratches (or a board case that has been skillfully repaired) and brought into a gaming facility, and one of the members of the organization attracts the attention of the staff at the gaming facility. In a very short time, other members have exchanged the entire board case with an illegally modified product and carried it away, and other members have been reported to play games on the altered gaming machine. . The conventional unauthorized opening prevention mechanism has a problem that it is difficult to suppress such a remodeling action.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a mechanism for preventing an unauthorized opening of a substrate case with an increased resistance to the unauthorized modification as described above.

  In order to solve the above problems and achieve the object, the present invention includes a first case body member and a first lid member that covers the first case body member, and is formed by the first case body member and the first lid member. A first circuit board (for example, the main circuit board case 50 in the embodiment) in which the first circuit board (for example, the main control board 35 in the embodiment) is accommodated and held in the case, a second case main body member, and the second case body member. The second circuit board (for example, the effect control board 38 in the embodiment) is accommodated and held inside a case that has a second lid member that covers the two case body members and is formed by the second case body member and the second lid member. A second board case (for example, the production board case 80 in the embodiment), and the base board used by being fixed in the gaming machine with the first board case and the second board case connected to each other. It is an unauthorized opening prevention mechanism of the case. In addition, in the unauthorized opening prevention mechanism of the present invention, the second substrate case cannot be opened unless the second case body member and the second lid member are connected to the second substrate case and the breaking structure for opening is broken. A second board case locking mechanism (for example, the production board case locking mechanism 90 in the embodiment) is provided, and the first board case and the second board case are disconnected only in a state where the second board case is opened and the first board case is released. It is comprised so that a board | substrate case can be open | released.

  The present invention is a mechanism for preventing an unauthorized opening of a board case in a form in which the first board case and the second board case are connected and used in a gaming machine, and the second board case is broken for opening. A second substrate case locking mechanism is provided that prevents the second substrate case from being opened unless the structure is broken, and the connection between the first substrate case and the second substrate case is released only when the second substrate case is opened. The first substrate case is configured to be opened. In other words, the first substrate case cannot be removed or opened unless the fracture structure of the second substrate case is broken. For this reason, when performing an illegal act on the first circuit board, first, the case locking mechanism of the second board case is broken to open the second board case, and then the second board case and the first board case are connected. It is necessary to cancel. In addition, since a plurality of input / output cables are connected to the first circuit board and the second circuit board, it is necessary to attach and detach them in order to replace the circuit board.

  For this reason, it takes a considerable amount of man-hours and time to tamper with the first circuit board, and this is a great deterrent against fraudulent persons who are particularly concerned with time. Therefore, according to the present invention, it is possible to provide a mechanism for preventing unauthorized opening of a substrate case that has improved resistance to organized illegal acts as well as illegal acts on a single substrate.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. As an example of a gaming machine to which the present invention is applied, FIG. 1 shows a perspective view of a pachinko machine PM as viewed obliquely from the front, and FIG. 2 shows a perspective view of the pachinko machine as viewed obliquely from the back. The overall configuration of the pachinko machine PM will be briefly described.

    In the pachinko machine PM, a front frame 2 for opening and closing mounted on a front surface of an outer frame 1 configured to have a predetermined frame size of an outer rectangular shape and forming a vertically fixed holding frame is formed on the front surface of the opening and closing of the rectangular frame size corresponding to this. The frame hinge mechanisms 3a and 3b arranged on the upper left and right sides of the front side are attached to the front so as to be able to be opened and closed laterally and attached to and detached from each other. When connected, they are kept closed.

  On the front side of the front frame 2, a rectangular glass door 5 and an upper ball tray 6 adapted to the front side area are assembled so that they can be opened and closed laterally and attached, and a lower ball tray 7 and a firing handle 8 are mounted on the lower side. Is provided. An upper part of the front frame located behind the glass door 5 is provided with an accommodation frame for detachably accommodating and holding the game board 10, and the game board 10 configured with a predetermined gauge setting can be attached to and detached from the accommodation frame. Is set and held so that the front gaming area faces the front of the glass door 5.

  The game board 10 has a decorative board with a cell attached to the surface of a laminated plywood, a transparent synthetic resin board, etc. as a substrate, and is surrounded by a guide rail provided on the front side so that a game ball can roll. Game areas are formed. The game area includes a large number of game nails and windmills, various prizes such as fixed prizes and movable prizes, and an image display device that displays an animation image according to the game development status. At the lower end of the game board, an out port is provided for discharging a game ball that has fallen without winning a prize to the back of the game board 10.

  A mechanism set board 20 called a back set board is attached to the rear of the front frame 2 located behind the game board 10, and a prize ball such as a ball storage tank 21 or a ball payout device 22 is attached here. A payout mechanism and a ball processing mechanism such as a game ball discharge passage for guiding game balls such as safe balls and out balls discharged from the game board 10 to a collection device of the game facility are provided. Various circuit boards such as a power supply board, a launch control board 32, a payout control board 33, a terminal board 34, a main control board 35, and an effect control board 38 are accommodated in the board case on the rear side of the back set board 20. The pachinko machine PM is configured to be operable by fixing the screws with each other and connecting each circuit board and the controlled object with a connector cable.

  In the pachinko machine PM configured as described above, the main control board 35 and the effect control board 38 are accommodated and held inside the main board case 50 and the effect board case 80, respectively, and an external perspective view is shown in FIG. In addition, the effect board case 80 is screwed to the back set board 20 in a state where the main board case 50 and the effect board case 80 are connected.

  A schematic configuration of the main board case 50 and the production board case 80 is shown as an exploded perspective view in FIG. In the following, for convenience of description, the arrangement posture shown in FIG.

  The main board case 50 includes a rectangular box-shaped case main body member (hereinafter referred to as a first case main body member to be distinguished from the case main body member of the effect board case 80) 51 and a rectangular box-shaped lid that opens downward. A member (similarly referred to as a first lid member) 52 is formed as a main body, and is surrounded by these members 51 and 52 in a state where the first lid member 52 is covered and closed from above the first case body member 51. The main control board 35 is accommodated and held inside the case.

  As shown in FIGS. 9 and 10, which are sectional views of the main board case 50 when the case is opened and closed, a main control board 35 and a solder surface of the main control board 35 are disposed at the bottom of the first case body member 51. A screw boss 53 and a reinforcing rib 54 for fixing the inner cover 36 to protect the main board case 50 and a reinforcing rib 54 are formed, and the main board case 50 is detachably connected to the effect board case 80. A female screw portion for screw-connecting the first case main body member 51 of the main board case 50 and the second lid member 82 of the effect board case 80, which are formed with a letter-shaped slide hook 55 projecting from the lower surface. 56 is formed.

  A hinge structure 57 that connects the first case body member 51 and the first lid member 52 so as to be capable of relative swinging and disengagement is provided on the left edge of the first case body member 51 and the first lid member 52. A main board case lock mechanism 60 is provided at the right edge of both of them so that the case cannot be opened unless the breaking structure for opening is broken. For this reason, the first case body member 51 and the first lid member 52 are connected to each other by the hinge structure 57 so as to be able to be opened / closed / removed horizontally, and are held closed by the main board case lock mechanism 60. The main board case lock mechanism 60 will be described in detail later.

  The first case body member 51 and the first lid member 52 are transparent resin materials, for example, synthetic resins such as ABS resin and polycarbonate (PC), in order to ensure the visibility of the main control board 35 accommodated and held in the case. Each is formed integrally by molding means such as injection molding using a material.

  The effect board case 80 includes a flat case body member (hereinafter, referred to as a second case body member to be distinguished from the case body member of the main board case 50) 81 and a rectangular box-like lid member (similarly, opened downward). 82) (referred to as a second lid member), and in the state of covering the second lid member 82 from above the second case body member 81 and closing it, the case is surrounded by both members 81, 82. The effect control board 38 is accommodated and held. The second case body member 81 and the second lid member 82 are similarly formed using the same resin material as the first case body member 51 and the first lid member 52.

  The second case body member 81 is formed with screw bosses 83 for supporting and fixing the effect control board 38, and female screw portions 84 for fixing the second lid member 82 are provided at the four corners. Corresponding to the four female screw portions, bottomed cylindrical screw holes are formed downward from the ceiling portion of the lid member 82. Of these, two screw holes 87 are formed in the V arrow in FIG. As shown in a sectional view in the viewing direction in FIG. 5, there is provided a production board case lock mechanism 90 in the form of a cap configured so that the case cannot be opened unless the breaking structure for opening is broken. . For this reason, the second lid member 82 is covered with the second case main body member 81 from above, and the fixing screw 88 is inserted into the screw hole and screwed into the female screw portion 84, whereby the second lid member 82 becomes the second case main body member. 81, and is held in a closed state by the effect board case lock mechanism 90.

  A hook receiving port 85 for receiving the slide hook 55 of the first case main body member 51 and fitting the main board case 50 in a detachable manner on the ceiling portion of the second lid member 82, and fitting connection In this state, a screw insertion hole 86 that is aligned with the female screw portion 56 on the first case body member 51 side and through which the fixing screw 58 is inserted is formed.

  The effect board case lock mechanism 90 shows a configuration example using a shielding cap. FIG. 6 shows an unopened shielding cap 91 and FIG. 7 shows an unsealed shielding cap 91 '. A plan view and (b) a sectional view along the axis are shown.

  The shielding cap 91 has a cylindrical collar portion 92 extending vertically, and a flange portion 93 having a larger diameter than the collar portion and formed in a disk shape at the upper end of the collar portion 92, for example, ABS resin. And a synthetic resin material such as polycarbonate. The collar portion 92 is formed with a lock arm 94 which is connected to the collar portion 92 at the lower portion and is cut into a U shape at the lower portion and elastically deformable in the radial direction at an opposing position 180 degrees apart. A wedge-shaped engagement protrusion 95 is formed on the portion so as to protrude outward from the collar portion 92. The flange portion 93 is provided with a rectangular lid portion 96 having one side connected by a thin connecting portion 97a and the periphery thereof being cut into a substantially rectangular shape. The lid portion 96 is joined to the flange portion 93 by a thin and narrow micro joint portion 97b on the opposite side of the thin-walled connecting portion 97a. A spherical recess 96a is formed on the upper surface of the lid portion 96 to prevent slipping of the driver tip and facilitate engagement.

  In the production board case lock mechanism 90 having such a configuration, the second case body member 81 is covered with the second lid member 82, the fixing screws 88 are inserted into the four screw holes, and the screwdriver is inserted into the screw holes to fix the fixing screws. 88 is screwed and fastened to the female screw portion 84. Then, the shielding cap 91 is pushed into the two screw holes 87. Since the outer diameter of the collar portion 92 in the shielding cap 91 is slightly smaller than the inner diameter of the insertion opening 87 a in the screw hole 87, the wedge-shaped engagement protrusion 95 projects from the collar portion 92 in the outer diameter direction. Is pushed into the screw hole 87, the wedge-shaped engaging projection 95 is pressed by the insertion opening 87 a of the screw hole 87, the lock arm 94 is elastically deformed and swings to the inner diameter side, and the collar portion 92 enters the screw hole 87. . When the flange portion 93 is completely pushed down to the counterbore portion at the upper end of the screw hole and the engaging projection 95 passes through the insertion opening 87a, the lock arm 94 expands in the outer diameter direction due to the elastic force and self-resets to the original state. As shown in FIG. 5, the engagement protrusion 95 engages with the lower surface of the insertion opening 87a.

  As a result, the shielding cap 91 is engaged and held while being pushed into the screw hole 87 and cannot be removed from the outside, and the fixing screw 88 cannot be directly touched due to the presence of the lid portion 96. Thereby, the 2nd cover member 82 is connected with the 2nd case main body member 81, and the production | presentation board | substrate case 80 is hold | maintained in the closed state.

  When the effect board case 80 is opened, as shown in FIG. 7B, for example, the tip of the driver DR is brought into contact with the recess 96a on the upper surface of the lid, and the lid 96 is strongly pressed from above. Then, the thin and narrow micro joint portion 97b is broken, and the lid portion 96 swings downward so as to be bent so that the thin connecting portion 97b is bent, and is immersed in the collar portion 92, and a rectangular opening 98 is formed at the center of the flange portion 92. Opens. When the rectangular opening 98 is opened, as shown in FIG. 7A, the head of the fixing screw 88 can be seen from the insertion opening 87a side of the screw hole, and by removing the fixing screw 88 by inserting the driver DR, The production board case 80 can be opened.

  The unsealed shielding cap 91 'in which the micro joint portion 97b is broken has two engaging protrusions 95 from the inside of the second lid member 82 using a cylindrical removal jig or the like with the substrate case opened. Can be removed from the screw hole 87 by releasing the engagement with the lower surface of the insertion opening 87a. When the production board case 80 is sealed again, the production board case 80 is sealed in a closed state by pressing and fixing an unused shielding cap 91 whose micro joint portion 97b is not broken to the insertion opening 87a. Can be held.

  Next, FIG. 8 to FIG. 10 show a configuration example in which the main board case lock mechanism 60 uses a connection member 70 also called a connection piece or a lock piece. Here, FIG. 8 shows (a) a state where the unlocking connecting member 70 is pulled out from the main body side housing 61, and (b) a state where the pulled out connecting member 70 is turned upside down and inserted into the main body side housing 61. FIG. 9 is a sectional view of the main board case locking mechanism 60 for explaining the action of the connecting member in the unlocked state, and FIG. 10 is the main board for explaining the action of the connecting member in the locked state. 4 is a cross-sectional view of a case lock mechanism 60. FIG.

  The main board case locking mechanism 60 includes a main body side housing 61 provided on the first case main body member 51, a lid side housing 62 provided on the first lid member 52, and a connecting member 70 fitted between them. And a plurality of sets (4 sets in the illustrated embodiment) are provided.

  The connecting member 70 has a rectangular section with a long side and a short side in a plan view, and has a bottomed rectangular tube shape having an opening 70a at one end and a bottom wall 70b at the other end. It is integrally formed of a synthetic resin material such as polycarbonate.

  A wall surface 71 (referred to as a short wall surface for convenience) 71 that forms a short side of a rectangular cross section is positioned on the opening 70a side, and the base portion is cut into a U-shape that is connected to the short wall surface 71 on the opening side. A distal end portion on the side is configured to be elastically deformable in the inner and outer directions of the rectangular tube, and a first lock claw 73 having a wedge shape in cross-section projecting outward toward the distal end portion is formed. In addition, a wall surface 72 (also referred to as a long wall surface) 72 that forms a long side of a rectangular cross section is located on the bottom wall 70b side, and the root portion is cut into a U-shape that is connected to the long wall surface 72 on the bottom wall side. The opening-side tip is configured to be elastically deformable inwardly and outwardly of the rectangular tube, and a second lock claw 74 having a wedge shape in cross-section protruding outward toward the tip is formed. On the outer surface side of the bottom wall 70b, in order to easily identify whether the connecting member 70 is in the locked posture with the bottom wall 70b facing upward or the unlocking posture with the opening 70a facing upward, The word “lock” is formed (see FIG. 8B).

  The main body side housing 61 provided in the first case main body member 51 and the lid side housing 62 provided in the first lid member 52 are rectangular sections each having a long side and a short side slightly larger than the connecting member 70. The main body side housing 61 is formed into a bottomed rectangular tube shape having an insertion / extraction opening 61a at the upper end, and the lid side housing 62 is formed into a bottomed rectangular tube shape having an insertion / extraction opening 62a at the lower end. The main body side housing 61 is joined to the side wall 51 s of the first case main body member via two thin plate-like fracture structure portions 65.

  On the other hand, the ceiling wall 52t of the first lid member is formed to extend outward from the side wall 52s that forms the accommodating space for the main control board 35 corresponding to the side wall 51s of the first case body member, and the lid-side housing 62 is The lid member 52 is integrally molded so as to protrude downward from the ceiling wall 52t. The ceiling wall 52t extends further outward than the lid-side housing 62 and is connected to a surrounding wall 52i having the entire height of the main board case. The ceiling wall 52t is aligned at four positions in the vertical position when the first lid member 52 is closed. The lid side housing 62 and the case side housing 61 are covered with the ceiling wall 52t and the surrounding wall 52i.

  The main body side housing 61 is provided with a square hole-shaped main body side claw locking hole 63 that receives and engages the first lock claw 73 and locks the connecting member 70 on the inner wall surface of the opposing short side, A concave-side main body side guide groove 64 for guiding the second lock claw 74 in the vertical direction is provided on the inner wall surfaces of the opposing long sides. A similar guide groove and claw locking hole are formed on each side facing the lid-side housing 62, but the arrangement positions are reversed between the long side and the short side. In other words, the lid-side housing 62 is provided with a square-side lid-side claw locking hole 66 that receives and engages the second lock claw 74 and locks the connecting member 70 on the inner wall surfaces of the opposing long sides. A concave-side cover-side guide groove 67 that guides the first lock claw 73 in the vertical direction is provided on the inner wall surface of the opposing short side.

  For this reason, as shown in FIGS. 8A and 9, the second lock claw formed on the long wall surface 72 when the connecting member 70 is mounted on the main body side housing 61 with the unlocking posture with the opening 70 a facing upward. 74 is guided by the main body side guide groove 64, the bottom wall side portion of the connecting member 70 is accommodated in the main body side housing 61, and the first lock member 52 is formed on the short wall surface 71 when the first lid member 52 is closed from above. The claw 73 is guided in the lid side guide groove 67 and the opening side portion of the connecting member 70 is accommodated in the lid side housing 62. In this state, the first lock claw 73 and the second lock claw 74 of the connecting member 70 are both positioned in the recessed groove-shaped guide grooves 67 and 64 extending vertically and can be relatively moved up and down. The case 50 can be freely opened and closed.

  On the other hand, as shown in FIGS. 8B and 10, when the connecting member 70 is mounted on the main body side housing 61 in the locking posture with the bottom wall 70 b facing upward, the first locking claw 73 formed on the short wall surface 71 is The main body side claw locking hole 63 is fitted and engaged, and the opening side portion of the connecting member 70 is fixed in a state of being accommodated in the main body side housing 61. Then, when the first lid member 52 is closed from above, the second lock claw 74 formed on the long wall surface 72 is fitted into the lid side claw locking hole 66 and engaged, and the bottom wall side portion of the connecting member 70 is engaged. It is fixed in the state accommodated in the lid side housing 62. In this state, both the first lock claw 73 and the second lock claw 74 of the connecting member 70 are engaged with each other in a state of being expanded in the square hole-like claw locking holes 63 and 66. The first case body member 51 and the lid member 52 of the substrate case 50 are locked in a closed state in which the first case body member 51 and the lid member 52 are coupled via the connecting member 70.

  Therefore, in the main board case lock mechanism 60, one of the plurality of main board case lock mechanisms is set in a locked state at the time of factory shipment. For example, when the four main board case lock mechanisms are the first case lock mechanism 60a to the fourth case lock mechanism 60d, only the connecting member of the first case lock mechanism 60a is in the lock posture, and the other case lock mechanisms 60b. , 60c, 60c are set to the unlocked posture, and the main board case 50 is closed. At this time, the connecting member of the first case lock mechanism 60a is locked inside the main body side and the lid side housings 61 and 62 with the bottom wall 70b facing upward, and the administrator of the game facility can The letters “lock” formed on the bottom wall can be visually confirmed through the ceiling surface 52t, thereby confirming that the first case lock mechanism 60a is in the locked state.

  When it is necessary to open the main board case 50, the main board case 50 is turned over, and the fracture structure portion 65 of the first case lock mechanism 60a located on the lower surface side of the main board case 50 is cut with a tool such as a nipper. To do. Then, the main body side housing 61 of the first case locking mechanism 60 a is connected to the first lid member 52 via the connecting member 70 in the locked posture, but the main body side housing 61 itself is separated from the first case main body member 51. Therefore, the connection between the first case body member 51 and the first lid member 52 is released, and the main board case 50 can be opened. Therefore, the main board case 50 can be opened to perform maintenance and inspection work for the main control board 35 and the like.

  When the main board case 50 is sealed again after the maintenance and inspection of the main control board 35 and the like, the case lock mechanism other than the first case lock mechanism 60a, for example, as shown in FIG. The connecting member 70 accommodated in the unlocking posture in the case lock mechanism 60b is pulled out, and as shown in FIG. 8 (b), it is turned upside down and mounted on the body side housing 61, and the first lid member 52 is attached from above. Close. Then, the first lock claw 73 and the second lock claw 74 of the connecting member 70 are engaged with the main body side claw locking hole 63 and the lid member side claw locking hole 66, respectively, and the first case main body member 51 and the first lid are engaged. The member 52 is coupled via the connecting member 70, and the main board case 50 is locked in the closed state by the second case locking mechanism 60b. At this time, from the upper side of the first lid member 52, the characters “lock” and the fracture structure portion 65 of the first case lock mechanism 60a are cut at two locations of the first case lock mechanism 60a and the second case lock mechanism 60b. The administrator has a history that the main board case 50 is once opened, and the main board case 50 is currently locked in the closed state by the second case lock mechanism 60b. Can be confirmed.

  In this manner, the main board case 50 locked in the closed state is connected and fixed to the effect board case 80. As described above, the L-shaped slide hook 55 protruding downward from the bottom surface is formed on the first case body member 51 of the main board case 50, and the slide cover hook is provided on the second lid member 82 of the effect board case 80. A hook receiving port 85 that receives 55 and engages by sliding operation is formed. In addition, female screw portions 56 are formed at four locations of the first case body member 51, and when the slide hook 55 and the hook receiving port 85 are engaged with and connected to the second lid member 82, the female screw portions 56 and the positions are located. Matching screw insertion holes 86 are formed at four locations.

  Therefore, as indicated by an arrow in FIG. 9, the closed main board case 50 is covered from above the second lid member 82, and the slide hooks 55, 55 are inserted into the hook receiving ports 85, 85. When the substrate case 50 is moved relative to the second lid member 82 in the left-right direction in which the slide hook 55 extends, the two slide hooks 55 and the hook receiving openings 85 are engaged with each other as shown in FIG. The female screw part 56 and the screw insertion hole 86 are arranged in vertical alignment with each other. Therefore, the main board case 50 in the closed state becomes the second lid member 82 of the effect board case 80 by screwing and fastening the fixing screw 58 to the female screw portion 56 from the inside of the second lid member 82 through the screw insertion hole 86. Connected and fixed.

  Then, the second lid member 82 to which the main board case 50 is connected and fixed in this manner is covered with the second case body member 81, and the fixing screws 88 are inserted into the four screw holes from the upper surface side of the second lid member. The second lid member 82 is connected to the second case main body member 81 by screwing and fastening to the female screw portion 84, and the production cap case 80 is fitted by sealing the shield cap 91 in the two screw holes 87. Is maintained in the closed state by the effect board case lock mechanism 90. Then, the main board case 50 and the production board case 80 that are closed and held by the main board case locking mechanism 60 and the production board case locking mechanism 90 are attached to the back set board 20 on the rear side of the pachinko machine as shown in FIG. In the embodiment, a configuration example is shown in which the production board case 80 is provided with legs extending rearward and fixed to the back set board. However, the main board case 50 is provided with a fixing part to fix the main board case to the back set board. Form may be sufficient.

  When the main control board 35 and the effect control board 38 that are closed and held by the main board case lock mechanism 60 and the effect board case lock mechanism 90 are attached to the pachinko machine PM in this way, each fracture structure portion 65 of the main board case lock mechanism 60 is obtained. Can be visually inspected through the ceiling wall 52t of the transparent first lid member 52, while the periphery of the fractured structure is covered with the ceiling wall 52t and the surrounding wall 52i of the first lid member 52, so that it can be directly touched. I can't.

  For this reason, an administrator or an inspector who inspects unauthorized modification of the main control board 35 can easily visually check the fracture structure portion 65 from the outside of the main board case 50, but performs unauthorized modification to the main control board 35. For the person who intends to do so, the first lid member covering the front and the surroundings becomes an obstacle and cannot be tampered with easily. Therefore, the ease of visual inspection and the resistance to the remodeling action can be compatible with the configuration in which the main substrate case 50 can be opened by breaking the fracture structure portion 65 only when the main substrate case 50 is removed.

  In addition, the production board case 80 is sealed by the production board case lock mechanism 90 which cannot be opened unless the micro joints 97b of the shielding cap 91 are broken and the four fixing screws 88 are removed. The connection between the main board case 50 and the effect board case 80 can be released by removing the four fixing screws 58 that can be operated only when the case 80 is opened.

  That is, in order to perform an illegal act with respect to the main control board 35, the stage board case lock mechanism 90 is broken to open the stage board case 80, and further, the four fixed positions located on the inner surface side of the second lid member 82 are fixed. The screw 58 is removed and the connection between the effect board case 80 and the main board case 50 must be released. Although not shown in each figure, a plurality of input / output cables are connected to the main control board 35 and the effect control board 38, respectively. It is necessary to attach and detach the input / output cable.

  For this reason, in the pachinko machine PM equipped with the unauthorized opening prevention mechanism as described above, it takes a considerable amount of time and man-hours to perform unauthorized modification or unauthorized replacement on the main control board 35. It is possible to exert a great deterrent against fraudsters whose time is a problem.

  In the present embodiment, since the main board case 50 is connected to the flat second lid member, the rupture structure section 65 is configured so that the rupture structure section 65 can be approached only when the main board case 50 is removed. Although the example of the configuration in which the ceiling wall 52t covering the front and the surrounding wall 52i surrounding the entire side is formed has been shown, for example, the main board case 50 is attached to the concave case mounting portion, In the case of a configuration that cannot approach 65, only the ceiling wall 52t can be provided without providing the surrounding wall 52i. Further, the surrounding wall 52i of the first lid member extends downward, and a groove portion matching the thickness and shape of the surrounding wall 52i is formed on the ceiling wall of the second lid member 82, so that the main board case 50 is the production board case 80. The lower end portion of the surrounding wall 52i is disposed in the groove portion of the effect board case 80 when it is fixed to the ceiling, or a concave portion that matches the outer peripheral shape of the surrounding wall 52i is formed on the ceiling wall of the second lid member 82. Then, when the main board case 50 is fixed to the effect board case 80, the entire lower end portion of the surrounding wall 52i may be disposed in the recess of the effect board case 80. According to such a configuration, even if an attempt is made to insert a cell or the like along the ceiling surface of the effect board case 80, it cannot be inserted, and the effect of preventing fraud can be further improved.

  In addition, a configuration example in which a lock piece type case lock mechanism is provided in the main board case 50 and a shielding cap type case lock mechanism is provided in the effect board case 80 has been shown. Or a case lock mechanism of the same type may be applied as appropriate. For example, as the production board case locking mechanism, the production board case 80 cannot be approached unless the production board case 80 is removed from the back set panel 20 as in the case of the main board case locking mechanism 60, or the production board case is broken from the front side of the production board case. It can be set as the structure provided with the well-known case lock mechanism of the lock piece type which can approach a structure part.

  Furthermore, in the embodiment, the embodiment in which the present invention is applied to the main control board of the pachinko machine has been described. However, the present invention can be applied to other circuit boards such as a payout control board and a launch control board. In addition, the same effect can be obtained by applying the same to circuit boards of other types of gaming machines, for example, an arrangement ball machine, a sparrow ball game machine, and a slot machine.

It is the perspective view seen from diagonally forward of the pachinko machine shown as an example of the gaming machine to which the present invention is applied. It is the perspective view which looked at the said pachinko machine from diagonally backward. It is an external appearance perspective view of the state with which the main board case and the production board case were connected. It is a disassembled perspective view which shows the outline | summary structure of a main board case and a production board case. FIG. 5 is a cross-sectional view of the effect board case locking mechanism in the direction of arrow V in FIG. 4. It is the (a) top view of the shielding cap of an unopened state, (b) Sectional drawing along an axis line. It is (a) top view of the shielding cap of an unsealed state, and (b) It is sectional drawing along an axis. It is a perspective view of the main board case locking mechanism which shows (a) connection member of an unlocking posture, and (b) connection member of a lock posture above the body side housing. It is sectional drawing of the main board | substrate case locking mechanism for demonstrating an effect | action of the connection member in an unlocked state. It is sectional drawing of the main board | substrate case locking mechanism for demonstrating the effect | action of the connection member in a locked state.

Explanation of symbols

PM Pachinko machine 20 Back set board 35 Main control board 38 Production control board 50 Main board case 51 First case body member 52 First lid member (52s side wall, 52t ceiling wall, 52i enclosure)
60 (60a to 60d) Main board case locking mechanism 61 Main body side housing 62 Lid side housing 65 Breaking structure 70 Connecting member 80 Production board case 81 Second case main body member 82 Second lid member 90 Production board case locking mechanism 91 Shielding cap (Unopened state)
91 'Shielding cap (opened state)
97b Micro joint part (breaking structure part)

Claims (1)

A first case body member and a first lid member that covers the first case body member; and a first circuit board is housed and held in a case formed by the first case body member and the first lid member. A board case,
A second case body member and a second lid member that covers the second case body member, and a second circuit board is housed and held in a case formed by the second case body member and the second lid member. A board case,
An unauthorized opening prevention mechanism for a substrate case that is used by being fixed in a gaming machine in a state where the first substrate case and the second substrate case are connected,
A second substrate case locking mechanism is provided that prevents the second substrate case from being opened unless the second case body member and the second lid member are connected to the second substrate case and the breaking structure for opening is not broken. With
Only in a state where the second substrate case is opened, the connection between the first substrate case and the second substrate case can be released and the first substrate case can be opened. Unauthorized opening prevention mechanism.

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