JP2009148383A - Tamperproof mechanism for board case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent access of a tool from a gap between the main body member and the connection part of a board case and make traces remain on unreasonable access. <P>SOLUTION: The tamperproof mechanism for a board case comprises a main body side engagement part having an engagement recess in the approximate middle on one end side of the case body member 50, a cover side engagement part 64 provided on one end side of a case cover member via the connection part 65 so as to face the main body side engagement part and formed into a bowl of which side facing the main body side engagement part opens and a stopper member that has an engagement catcher protruding outside and is inserted into the cover side engagement part 64. When the case cover member is set in the case body member 50, engagement of the recess and the catcher fixes the case body member 50 to the cover member, holding them in a closed state. The connection part 65 connecting the one end side of the cover member with the cover side engagement part 64, when the cover member is set in the case body member 50, makes itself a flat shape approximately vertically extending to the case body member 50 and the end facing the case body member 50 extend so as to approach the case body member 50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a board case unauthorized opening prevention mechanism for preventing a board case from being illegally opened in a board case which is accommodated and held inside a control board for controlling the operation of the gaming machine. .

  Game machines such as pachinko machines and slot machines have control boards that control the operation of gaming machines, such as payout control of prize balls or medals, opening / closing control of electric accessories, rotation control of reels, control of occurrence of symbol combinations, etc. A plurality are provided. These control boards are used to prevent unauthorized modification such as replacement with illegal ROMs in which game programs have been altered, or the addition of illegal circuits by flying so-called jumper wires on the back side of the control board. When a misconduct is made on the control board, it is attached to the gaming machine in a state of being housed in a transparent board case so that the state can be detected early from the outside by visual inspection.

  The substrate case is provided with means for preventing unauthorized opening so that the trace remains when the case is opened, and various means for preventing such unauthorized opening have been proposed and put to practical use (for example, Patent Documents). 1). For example, it is known that the substrate case is configured such that the lid member swings with respect to the main body member so that the lid member can be opened and closed, and the closed main body member and the lid member are fastened with a special screw to prevent unauthorized opening. It has been. As described above, the substrate case configured to fasten the main body member and the lid member with the special screw has a problem that the assembly work of the substrate case becomes complicated.

  Further, the substrate case is configured to be able to open and close by sliding the lid member relative to the main body member, the main body member has an engaging recess, and the holding member for holding the stopper member having the engaging claw portion on the lid member. There is known a structure that is provided via a severable connecting portion and is configured so that the engaging recess and the engaging claw are engaged to fix and hold the main body member and the lid member in the closed state. In the substrate case configured to fix and hold the main body member and the lid member in the closed state by the stopper member in this way, the stopper member is inserted into the holding portion and the lid member is simply slid relative to the main body member. Since it is good, the assembly work of the substrate case is easy. In addition, in order to open the board case, it is necessary to cut the connecting part and separate the holding part from the lid member. It can be detected and fraud can be effectively deterred.

JP 2007-50231 A

  By the way, in the substrate case configured to fix and hold the main body member and the lid member in the closed state by the stopper member as described above, for example, in order to inspect the control substrate accommodated and held inside, the connecting portion is provided. There are cases where the closed substrate case is opened by cutting with a tool such as a nipper. Conventionally, this connecting portion has been provided in consideration of the minimum strength as a connecting portion and the workability of cutting with a tool such as a nipper, and a gap between the main body member and the connecting portion in the closed substrate case. Has occurred. Therefore, there is a possibility that the substrate case is illegally opened without leaving a large trace by inserting and operating a tool such as a screwdriver in a gap generated between the main body member and the connecting portion.

  The present invention has been made in view of such a problem, and prevents access to the tool from a gap generated between the main body member of the substrate case and the connecting portion, and forcibly inserts the tool. It is an object of the present invention to provide a mechanism for preventing unauthorized opening of a substrate case that can clearly leave the trace.

  In order to solve the above-described problems and achieve the object, an unauthorized opening prevention mechanism according to the present invention is configured such that a case lid member is slid and attached to a case body member, and a gaming machine (for example, a pachinko machine in the embodiment) Used for a board case (for example, the main board case 100 in the embodiment) that accommodates and holds a control board (for example, the main control board 31 in the embodiment) that controls the operation of the machine PM). A main body side engaging portion formed on one end side of the case main body member and having an engaging concave portion formed in a concave shape at a substantially central portion; and the main body side engaging portion when the case main body member is mounted. A lid-side engaging portion that is provided on one end side of the case lid member so as to be opposed to the main body-side engaging portion and is formed in a bowl shape that is open on the side facing the main body-side engaging portion, and protrudes to the outside. A stopper member inserted into the lid side engaging portion, and when the case lid member is attached to the case main body member, the engaging recess and the engaging claw portion Are engaged so that the case body member and the case lid member are fixedly held in a closed state. And the said connection part which connects the one end side of the said case cover member and the said cover side engaging part is substantially perpendicular | vertical with respect to the said case main body member when the said case cover member is mounted | worn with the said case main body member. And an end portion facing the case body member is provided so as to be close to the case body member.

  In the unauthorized opening prevention mechanism of the substrate case, the connecting portion has a thickness of a main body side portion (for example, the front portion 65a in the embodiment) on the side close to the case main body member on the side opposite to the main body side portion. It is preferable to be formed thinner than the portion.

  In the unauthorized opening prevention mechanism for a substrate case according to the present invention, when the case lid member is attached to the case main body member, the case main body member is connected to the connecting portion that connects the one end side of the case lid member and the lid side engaging portion. Are formed in a plate shape extending substantially perpendicular to the case body, and are provided so as to extend so that the end portion facing the case body member is close to the case body member. Therefore, there is no gap enough to allow a tool such as a screwdriver to be inserted between the case body member and the connecting portion. Therefore, it is possible to prevent the substrate case from being illegally opened by accessing the tool from between the case body member and the connecting portion.

  Further, the connecting portion is formed such that the thickness of the main body side portion on the side close to the case main body member is thinner than the opposite side portion connected to the main body side portion. If you forcibly insert a tool in between, the body side part of the connecting part formed thinly will be broken and the trace of the break will remain clearly, so that it is possible to detect unauthorized opening of the substrate case at an early stage , Fraud can be effectively deterred.

  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, a front view and a rear perspective view of a pachinko machine PM are shown in FIG. 1 and FIG. 2, respectively, and the overall configuration of the pachinko machine PM will be described with reference to this figure.

  The pachinko machine PM has a front frame 2 having an open / close mounting frame configured in a rectangular frame size in accordance with a rectangular frame size corresponding to the front of the opening of the outer frame 1 configured in a predetermined frame size of the outer rectangle and forming a vertically fixed holding frame. Are attached to the front left side opening / closing and detachable by upper and lower hinge mechanisms 3a, 3b arranged at the front left edge of each other, and always using the locking mechanism 4 provided at the front right edge. The outer frame 1 is held closed and locked.

  On the front side of the front frame 2, a rectangular glass door 5 and a ball tray unit 6 adapted to the front side area are laterally opened / closed and detached using hinge mechanisms 7 a, 7 b, 7 c provided on the left side of the front side. And is always held in a closed state on the outer frame 1 using the locking mechanism 4. An operation handle 8 for performing a game ball launching operation is provided at the lower right side of the ball tray unit 6, and a speaker 9 for generating sound effects is provided to the left of the operation handle 8. A rectangular frame-shaped storage frame (not shown) that protrudes rearward from the center to the top of the front frame 2 is formed integrally with the front frame 2, and the game board is configured with a predetermined gauge setting in the storage frame. 10 is detachably set and held, and the game area PA on the front side of the game board 10 can be faced through the glass door 5 which is always closed and held.

  The game board 10 is configured with a decorative board 11 (also referred to as a veneer board) in which cells of a predetermined design are attached to the surface of a laminated plywood, and inner and outer guide rails 12 are formed in an arc shape on the front side of the decorative board 11. A substantially circular game area PA in which a game ball launched from a game ball launcher (not shown) can roll is defined on the inner side that is fixedly surrounded by the guide rail 12.

  In the game area PA, in addition to a large number of game nails and windmills 13, a general winning tool, a starting tool, a winning tool 14 such as an attacker having a large winning opening, and a predetermined image are displayed according to the progress of the game. An image display device 15 is provided. At the lower end of the game area PA, there is provided an out port 16 through which a game ball (referred to as “out ball”) that has fallen to the lower end of the game area PA without winning the winning device 14 is discharged to the back surface of the game board 10. Yes. A game ball (referred to as a “safe ball”) dropped into each winning device 14 is detected by a winning port switch or a start port switch provided on these winning devices 14 and passes through the decorative board 11 (see FIG. It is discharged to the back surface of the game board 10 through (not shown). Further, the out balls collected at the out port 16 are discharged to the back side of the game board 10 through an out ball passage (not shown) penetrating the decorative board 11. Each part of the glass door 5 and the game board 10 is provided with an electric decoration device 17 using a light source such as an LED or a lamp for visually producing game development.

  The pachinko machine PM configured as described above is used in a game in which the front frame 2, the glass door 5, and the ball tray unit 6 are all closed and locked, and the ball ball unit 6 stores the game ball for operation. A game is started by rotating the handle 8. When the operation handle 8 is rotated, the game balls stored in the ball tray unit 6 are shot one by one into the game area PA of the game board 10 by a game ball launching device (not shown), and thereafter the pachinko game is played. Be expanded.

  On the back side of the front frame 2 located behind the game board 10 is a main board assembly 30 that houses a main control board 31 (see FIG. 3) that controls the operation of the pachinko machine PM in an integrated manner. An image board assembly 40 containing an image control board (not shown) for controlling an image displayed on the image display device 15 provided in the game board 10 in accordance with the game development at 31 is attached. In the following description, the front and rear directions, the left and right directions, and the up and down directions indicated in the drawings will be referred to as front and rear directions, left and right directions, and up and down directions, respectively (see FIG. 2).

  An opening 18 for attaching the image display device 15 is formed at the center of the game board 10, and the image assembly attachment part 19 a is provided on the left and right edges on the back side of the game board 10 so as to sandwich the opening 18. , 19b are disposed. A total of four mounting projections 40a and 40b are formed on the upper and lower sides of the left and right side portions of the image board assembly 40. The mounting projections 40a and 40b are attached to the image assembly mounting portions 19a and 19b by screw fastening or the like. Thus, the image board assembly 40 is fixed to the game board 10.

  A pair of left and right main board assembly mounting portions 20 are disposed on the left and right edge portions on the back side of the lower part of the game board 10, and the main board assembly 30 is attached to the main board assembly mounting portion 20. . The main board assembly mounting part 20 is formed so as to protrude rearward from the image assembly mounting parts 19a and 19b, and the upper part of the main board assembly 30 is located behind the lower part of the image board assembly 40 in the rear view. It is attached to the game board 10 so that it may cover. As described above, the main board assembly 30 is arranged so as to cover a part of the image board assembly 40 (partly overlap in the rear view), so that the size of the image board assembly 40 is increased in the vertical direction of the game board 10. These assemblies 30 and 40 can be disposed on the back side of the game board 10 without increasing the size.

  Next, the main substrate assembly 30 will be described with reference to FIGS. The main board assembly 30 includes a main control board 31 that comprehensively controls the operation of the pachinko machine PM, and a main board case 100 (see FIG. 4) that accommodates the main control board 31 therein. Further, the main board case 100 includes a case body member 50 that is attached to and detached from the back side of the game board 10 and a case lid member 60 that is detachably attached to the case body member 50.

  The main board assembly 30 is configured such that the case lid member 60 can be attached to the case body member 50 in a state where the main control board 31 is attached to the inner surface side of the case lid member 60. The main board assembly 30 is fixed to the main board assembly mounting portion 20 with a left ny latch (registered trademark) 36 attached to a left side fixing portion 58 extending outward from the left side portion of the case body member 50, and a case lid member. A right Nylatch (registered trademark) 37 attached to a right fixing part 68 extending outward from the right side of 60 is used.

  As shown in FIG. 3, the main control board 31 has a rectangular plate shape. On the rear surface, a ROM and a RAM arranged in the center are arranged on the electronic device 32 such as a built-in CPU and on the left and right. .. And the like, and a plurality of wiring patterns (not shown) arranged on both sides. .. Are formed in the case lid member 60 by inserting board mounting screws 35, 35,... Into the respective board mounting holes 34. It is configured to be screwed into the board attaching portions 67, 67,... (See FIG. 5) and fastened with screws.

  The case body member 50 has a rectangular box shape having an opening on the rear surface side in a state where the main board case 100 is attached to the game board 10, and is a transparent resin material such as ABS resin or polycarbonate (PC). It is molded using. Reinforcing ribs 51 a are formed in a lattice shape vertically and horizontally on the inner surface side bottom 51 of the case body member 50, thereby improving the strength of the case body member 50.

  A plurality of lid member attachment grooves 54 are formed in the body member side wall portions (side wall portions extending rearward from the upper and lower edges of the bottom portion 51) 53, 53 of the case body member 50, respectively. The lid member mounting groove 54 includes an insertion groove portion that opens rearward and on the inner surface side of the case main body member 50, and a locking groove portion that extends leftward and opens on the inner surface side of the case main body member 50, and is viewed from above or below. It is formed as an L-shaped groove with respect to the main body member side wall 53. Further, a lid member pressing wall 52 is formed to extend rearward from the bottom portion 51 in a plate shape so as to face each lid member mounting groove 54 in parallel with the inner wall surface of the main body member side wall portion 53. The width in the left-right direction of the lid member pressing wall 52 is formed to be approximately the same as the width in the left-right direction of the lid member mounting groove 54, and when viewed from above or below, the lid member pressing wall 52 and the lid member The mounting groove 54 is arranged so as to overlap.

  The case lid member 60 has a rectangular box shape covering the opening of the case body member 50, and is integrally formed using a transparent resin material such as ABS resin or polycarbonate (PC). A plurality of locking projections 62 projecting in the vertical direction (outward) are formed on the lid member side wall 66 extending forward from the upper, lower, left and right edges of the case lid member 60. The same number of the locking projections 62 as the lid member mounting grooves 54 are formed, and the arrangement interval thereof also corresponds to the lid member mounting grooves 54. Further, on the inner side surface of the lid member side wall portion 66, a pressing projection portion 61 (see FIG. 5) that projects inward corresponding to each locking projection portion 62 is formed. The pressing protrusion 61 is formed so as to be shifted in a direction opposite to the direction in which the pressing protrusion 61 slides when the case lid member 60 is attached to the case body member 50 with respect to the locking protrusion 62.

  When attaching the case lid member 60 to the case body member 50, the locking projection 62 is inserted into the insertion groove portion of the lid member attachment groove 54 from the rear, and then the case lid member 60 is moved in the left-right direction (in this embodiment). Is moved to the left) and the locking projection 62 is inserted into the locking groove of the lid member mounting groove 54 so that the locking projection 62 and the lid member mounting groove 54 are fitted.

  At this time, in a state where the locking projection 62 is inserted into the insertion groove of the lid member mounting groove 54, the pressing projection 61 projecting inward from the inner side surface of the lid member side wall 66 is the right side of the lid member pressing wall 52. In this state, the case lid member 60 is slid to the left with respect to the case body member 50, and the locking projection 62 is inserted into the locking groove of the lid member mounting groove 54. The outer side surface of the lid member side wall portion 66 and the inner side surface of the main body member side wall portion 53 are in close contact with each other, and the pressing projection 61 is held between the main body member side wall portion 53 and the lid member pressing wall 52.

  When the case main body member 50 and the case lid member 60 are configured as described above, when the case lid member 60 is attached to the case main body member 50, the locking projection 62 is fitted to the lid member attachment groove 54, and thus the case The lid member 60 is restricted from moving rearward relative to the case body member 50 (movement for removing the case lid member 60 from the case body member 50). Further, since the lid member side wall portion 66 is pressed against and closely contacts the inner side surface of the case main body member 50 by the pressing projection 61 projecting inward from the inner side surface and the lid member pressing wall 52, the lid member side wall portion 66 cannot be pushed inward, and the locking projection 62 cannot be removed from the lid member mounting groove 54.

  A body-side temporary fixing portion 55 is formed at the left end portion of the case main body member 50, and a lid-side temporary fixing portion 63 is formed at the left end side of the case lid member 60. When the case lid member 60 is attached to the case body member 50, that is, when the case lid member 60 is slid and attached to the case body member 50 in the left direction, these body side temporary fixing portions 55 are attached. And the lid-side temporary fixing portion 63 are engaged with each other, and the case lid member 60 is restricted from sliding to the right with respect to the case body member 50. Note that the case body member 50 and the case lid member 60 are thinly formed of a resin material as described above, and can be easily bent. Therefore, by bending the left end side of the lid side temporary fixing part 63 away from the main body side temporary fixing part 55, the engagement between the main body side temporary fixing part 55 and the lid side temporary fixing part 63 is released, and the case body The case lid member 60 can be removed from the case body member 50 by sliding the case lid member 60 to the right with respect to the member 50.

  In this way, the main board case 100 in which the main control board 31 is accommodated is divided into the case main body member 50 and the case lid member 60 that can be separated from each other, thereby attaching the main control board 31 to the case lid member 60. At this time, since the opening of the case lid member 60 can be mounted on a work desk or the like with the opening facing upward, the mounting work is facilitated and the assembly work efficiency is improved. Also, when attaching the case lid member 60 to the case main body member 50, the case lid member 60 can be attached only by sliding movement, so this operation is also easy. Further, when the case lid member 60 is slidably attached to the case body member 50 in this way, the lid member attachment groove 54 is provided on the case body member 50 side, and the locking projection 62 is provided on the case lid member 60. Since the attachment structure can be formed by this, the main board case 100 can be made into a simple structure.

  As described above, since the main control board 31 is stored in the main board case 100 (the case main body member 50 and the case lid member 60), an illegal act on the main control board 31 can be prevented. However, when the case lid member 60 is attached to the case body member 50, the body side temporary fastening portion 55 and the lid side temporary fastening portion 63 are merely engaged, and the case body member It is easy to remove the case lid member 60 from 50. Therefore, in order to prevent the case lid member 60 in the closed state from slidingly moving with respect to the case body member 50 and preventing unauthorized operation, the main substrate case 100 of the main substrate assembly 30 is provided with an unauthorized opening prevention mechanism 70. ing. Therefore, the unauthorized opening prevention mechanism 70 provided in the main board assembly 30 will be described below with additional reference to FIGS.

  As illustrated in FIG. 3 and the like, the unauthorized opening prevention mechanism 70 is connected to the left end side of the case lid member 60 and the four main body side engaging portions 56 integrally formed by connecting to the left end side of the case main body member 50. The four lid-side engaging portions 64 are formed, and the four stopper members 71 are inserted into the lid-side engaging portion 64 and hold the case lid member 60 on the case body member 50.

  As shown in FIG. 5, when the case lid member 60 is attached to the case body member 50, the main body side engaging portion 56 includes an engaging bottom portion 56a covered with the lid side engaging portion 64, and the engaging bottom portion. 56a, and an engagement wall 56b extending forward from the upper and lower edges and the left edge of the cover 56a and covering the opening of the lid-side engagement part 64. A concave engagement is provided at the substantially central part of the engagement bottom 56a. A mating recess 56c and a concave nail retracting recess 56f are formed side by side. Engaging grooves 56d and 56d extending left and right are formed so as to sandwich the engaging recess 56c and the claw retracting recess 56f vertically. Furthermore, engagement holding portions 56e and 56e for holding the lid side engagement portion 64 when the case lid member 60 is attached to the case main body member 50 are formed at the right end of the engagement wall portion 56b.

  The lid side engaging portion 64 is formed in a rectangular box shape that opens to the side (front side) facing the main body side engaging portion 56 when the case lid member 60 is attached to the case main body member 50. The case lid member 60 is connected by a connecting portion 65 to a left side wall portion 66 that forms a region for storing the main control board 31. Engaging protrusions 64a and 64a are formed on the upper and lower side portions so as to protrude outward and engage with the above-described engaging holding portion 56e. The engagement protrusion 64a extends from the left and is inserted into the engagement holding portion 56e, and from the engagement portion that extends rearward and abuts the right end of the engagement wall 56b. It is configured and formed as L-shaped protrusions (ribs) on the upper and lower side portions of the lid-side engaging portion 64 when viewed from below or above (see FIG. 3). 6 and 7, the abutting portion of the engaging protrusion 64a extends in the front-rear direction from the front end to the rear end of the upper and lower sides of the lid side engaging portion 64, and gradually toward the rear end. The left and right thicknesses are formed so as to be thin, and when the case lid member 60 is attached to the case body member 50, it protrudes rearward and upward or downward from the engagement wall portion 56b.

  The connecting portion 65 that connects the right side surface of the lid side engaging portion 64 and the left side wall portion 66 is formed in a pair of upper and lower plates extending in the front-rear direction from the front end to the rear end of the right side surface of the lid side engaging portion 64. When the case lid member 60 is attached to the case body member 50, the front end portion of the connecting portion 65 is configured to be close to the engagement bottom portion 56. Further, as shown in FIG. 7, the plate thickness (vertical thickness) of the connecting portion 65 is formed such that the front portion 65a (the side close to the case body member 50) is thinner than the rear portion 65b. Further, the front portion 65a is formed so as to gradually become thinner toward the front side. The connecting portion 65 is configured to be cuttable, and the lid side engaging portion 64 can be separated from the case lid member 60.

  As shown in FIG. 3, the stopper member 71 is formed in a rectangular box shape made of resin or the like, and includes an engaging claw portion 72 cut into a tongue shape on one surface, and the engaging claw portion 72. Guide portions 73 and 73 are formed so as to protrude outwardly and extend substantially parallel to the direction in which the engaging claw portion extends. The stopper member 71 is used by being inserted into the lid side engaging portion 64, and as shown in FIG. 8, when the sliding movement of the case lid member 60 attached to the case body member 50 in the right direction is restricted. The engaging claw 72 is inserted so as to face outward. On the other hand, when the engagement claw portion 72 is inserted so as to be positioned in the lid side engagement portion 64, the case lid member 60 can slide to the right with respect to the case body member 50.

  The stopper member 71 is inserted into the lid side engaging portion 64 so that the engaging claw portion 72 faces outward, and the case lid member 60 is slid relative to the case body member 50 so that the lid side engaging portion 64 is moved. When the main body side engaging portion 56 is opposed and overlapped, the engaging claw portion 72 provided on the stopper member 71 inserted into the lid side engaging portion 64 and the engaging portion provided on the main body side engaging portion 56 are provided. The recess 56c engages (see FIG. 8), the guide portions 73 and 73 of the stopper member 71 are inserted into the engagement grooves 56d and 56d of the main body side engagement portion 56, respectively, and the engagement protrusion 64a. And the engagement holding portion 56c are fitted together, and the main body side engagement portion 56 and the lid side engagement portion 64 are latched and held, and the sliding movement of the case lid member 60 in the right direction with respect to the case main body member 50 is restricted. Is done. Therefore, the state where the case lid member 60 is attached to the case body member 50, that is, the locked state is maintained. Thereby, the main body side engaging part 56 and the lid side engaging part 64 can be easily connected via the stopper member 71, and the case main body member 50 and the case cover member 60 are easily connected and held in the closed state. can do.

  If the case main body member 50 and the case lid member 60 are coupled and held in the closed state by the unauthorized opening prevention mechanism 70, the engagement with the stopper member 71 engaged with the main body side engaging portion 56 is released. In order to open the main substrate case 100 (main substrate assembly 30), it is necessary to cut the connecting portion 65 and separate the lid side engaging portion 64 from the case lid member 60. Therefore, after the main board case 100 is released, the cutting trace of the connecting portion 65 remains clearly, so that unauthorized opening can be detected at an early stage and illegal acts can be effectively suppressed.

  Further, in the unauthorized opening prevention mechanism 70, the connecting portion 65 that connects the left side wall portion 66 of the case lid member 60 and the right side surface of the lid side engaging portion 64 extends from the front end of the right side surface of the lid side engaging portion 64. It is formed in a pair of upper and lower plates extending in the front-rear direction to the rear end, and is configured such that when the case lid member 60 is attached to the case body member 50, the front end portion of the connecting portion 65 is close to the engagement bottom portion 56. Has been. Therefore, there is no gap between the case main body member 50 (engagement bottom portion 56) and the connecting portion 65 so that a tool such as a screwdriver can be inserted. Therefore, it is possible to prevent the main substrate case 100 from being illegally opened due to access of a tool or the like from between the case body member 50 and the connecting portion 65.

  Further, the connecting portion 65 that connects the left side wall portion 66 of the case lid member 60 and the right side surface of the lid side engaging portion 64 has a plate thickness (vertical direction) of the front portion 65a on the side close to the case body member 50. ) Is thinner than the rear portion 65b. Therefore, when a tool or the like is forcibly inserted between the case main body member 50 and the connecting portion 65, the front portion 65a of the connecting portion 65 formed to be thin (thin) is broken and a fracture mark remains clearly. Therefore, unauthorized opening of the main board case 100 can be detected at an early stage, and fraud can be effectively suppressed.

  Further, the abutting portions of the engaging protrusions 64a formed on the upper and lower side portions of the lid side engaging portion 64 extend in the front-rear direction from the front end to the rear end of the upper and lower side portions of the lid side engaging portion 64, and It is formed so that the thickness on the left and right sides gradually decreases toward the end side, and protrudes rearward and upward or downward from the engaging wall portion 56b when the case lid member 60 is attached to the case body member 50. It has become. Therefore, if a tool or the like is inserted between the right end portion of the engaging wall portion 56b and the engaging portion of the engaging projection portion 64a to attempt to open the main substrate case 100 illegally, the front and rear sides of the conventional substrate case are more than In addition, since the abutting portion of the engaging protrusion 64a that is large in the vertical direction and has a thin (thin) rear end side is destroyed and a trace of destruction remains clearly, the unauthorized opening of the main board case 100 is made early. It can be found and fraud can be effectively deterred.

  In this embodiment, the unauthorized opening prevention mechanism 70 has four sets of the main body side engaging portion 56, the lid side engaging portion 64, and the stopper member 71, and the main board case 100 is prevented from being illegally opened. In order to be coupled and held by the mechanism 70, any one of the stopper members 71 may be inserted so that the engaging claw portion 72 protrudes outward with respect to the lid side engaging portion 64. Therefore, for example, even if the main board case 100 is opened to inspect the main control board 31, it can be brought into a closed state by using another set of unauthorized opening prevention mechanisms 70. Further, it is possible to grasp how many times the main board case 100 is opened by the number of the lid-side engaging portions 64 (the connecting portions 65) cut.

  In addition, this invention is not limited to said embodiment, A various deformation | transformation is within the range of the summary that the connection part 65 is extended and provided so that it may adjoin to the case main body member 50 (engagement bottom part 56). Is possible. For example, in this embodiment, the connecting portion 65 is formed in a pair of upper and lower plates extending in the front-rear direction from the front end to the rear end of the right side surface of the lid side engaging portion 64, but the rear of the pair of connecting portions 65 You may form in the dome shape which the end side (side which is not adjacent to the case main body member 50) connected. Thus, if the rear end side of the connection part 65 is formed in a dome shape, the effect that the cutting trace of the connection part 65 will remain easily more clearly can be acquired.

It is a front view of the pachinko machine shown as an example of the gaming machine according to the present invention. It is a perspective view of the back side of the pachinko machine. It is a disassembled perspective view of the main board | substrate assembly provided in the said pachinko machine. It is a top view of the main board case which comprises the said main board assembly. It is a figure which shows the case main body member and case cover member which comprise the said main substrate case, Comprising: (a) is a top view of a case main body member, (b) is a bottom view of a case cover member. It is the side view to which the principal part of the main board case was expanded. It is VII-VII sectional drawing of FIG. It is VIII-VIII sectional drawing of FIG.

Explanation of symbols

PM Pachinko machine (game machine) 31 Main control board (control board)
50 Case main body member 56 Main body side engaging portion 56c Engaging recess 60 Case lid member 64 Lid side engaging portion 65 Connecting portion 65a Front portion (main body side portion) 70 Unauthorized opening prevention mechanism 71 Stopper member 72 Engaging claw portion 100 Main Board case (Board case)

Claims (2)

In the case where the case lid member is slid and attached to the case body member, and the control board for controlling the operation of the gaming machine is accommodated and held in the board case attached to the gaming machine,
A main body side engaging portion formed on one end side of the case main body member, and having an engaging concave portion formed in a concave shape in a substantially central portion;
A hook that is provided on one end side of the case lid member via a connecting portion so as to face the main body side engaging portion when mounted on the case main body member, and that opens on the side facing the main body side engaging portion. A lid side engaging portion formed in a shape;
An engaging claw that protrudes to the outside, and a stopper member that is inserted into the lid-side engaging portion; and when the case lid member is attached to the case body member, An improper opening prevention mechanism for a substrate case that engages with an engaging claw and fixes and holds the case main body member and the case lid member in a closed state,
The connecting portion that connects one end side of the case lid member and the lid side engaging portion extends substantially perpendicular to the case body member when the case lid member is attached to the case body member. An unauthorized opening prevention mechanism for a substrate case, which is formed in a plate shape, and is provided so that an end portion facing the case main body member extends close to the case main body member.   The unauthorized connection of the substrate case is characterized in that the connecting portion is formed so that the thickness of the main body side portion on the side close to the case main body member is thinner than the opposite side portion connected to the main body side portion. Prevention mechanism.

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