JP2012011094A - Fraudulent opening prevention mechanism of board case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fraudulent opening prevention mechanism of a board case which is structured so as to permit the trace of the fraudulent opening of a board case to be clearly left.SOLUTION: In the fraudulent opening prevention mechanism, a connection 85 has an outside periphery curved surface 85a bent into a circular arc around a prescribed axis, connected to the side wall portion 57 of a case lid member 50 on the one end side of the axial direction, and connected to a lid side engagement portion 80 on the other end side of the axial direction. The corner portion 86 on the one end side where the outside periphery curved surface 85a of the connection 85 crosses the side wall portion 57 of the case lid member 50 is formed by smoothly connecting the outside periphery curved surface 85a and the side wall portion 57 by denting it into a circular arc.

Description

  The present invention relates to a board case that accommodates a control board that controls electronic components mounted on a gaming machine in a gaming machine such as a pachinko machine or a slot machine, and more specifically, an illegal opening of a board case that houses a control board. The present invention relates to an unauthorized opening prevention mechanism for preventing operation.

  In gaming machines such as pachinko machines and slot machines, a control board for controlling the operation of the gaming machine is provided. For example, in a pachinko machine, a game board or the like is mounted on a storage frame on the back side of the front frame that is assembled so as to be openable and closable with respect to an outer frame, and a control board is attached to the game board. Similarly, in the slot machine, a control board is attached to the back side of the front mask or the inside of the cabinet. These control boards are boards that control the operation of pachinko machines or slot machines, such as prize ball or medal payout control, opening / closing control of electric objects, reel rotation control, symbol combination occurrence probability control, etc. A ROM in which the control software is recorded is mounted and has a role as a central control device that controls the operation of the gaming machine (see, for example, Patent Document 1).

  The control board having the role as such a central control device is accommodated in the board case as a countermeasure against unauthorized modification such as replacement with a counterfeit ROM, and unauthorized opening prevention means for preventing the board case from being opened illegally is provided. It is known to provide. As the unauthorized opening prevention means, for example, when the control board is housed in a board case made up of a case body member and a case lid member, and the case lid member is mounted in a closed state with respect to the case body member, the case body member side Unless the engagement portion formed on the case lid is engaged with the engagement portion formed on the case lid member side and the connecting portion connecting the case lid member and the engagement portion is disconnected using a tool such as a nipper. Various so-called caulking structures that make it impossible to separate the main body member and the case lid member have been proposed and put into practical use (see, for example, Patent Document 2).

JP 2009-183788 A JP 2007-50231 A

  By the way, in the board case configured to connect and hold the case main body member and the case lid member in the closed state by the caulking structure as described above, maintenance inspection and inspection of the control board accommodated and held in the case are performed. For this reason, the connecting portion that connects the case lid member and the engaging portion may be cut to open the closed substrate case. The connecting portion is conventionally formed based on a shape considering the workability of cutting together with the minimum strength as the connecting portion. In Patent Document 2, the case lid member and the engaging portion are formed in a thin plate shape. A configuration in which two connecting portions are connected is disclosed. Therefore, for example, by cutting the connecting part smoothly (flat) along the joint between the connecting part and the case lid member, the board case is illegally opened, and then the joint part is adhered cleanly. If the connecting portion is restored, there is a possibility that an unauthorized opening cannot be found without clearly leaving traces of cutting.

  The present invention has been made in view of such a problem, and provides a mechanism for preventing an unauthorized opening of a substrate case having a structure capable of clearly leaving a trace when the substrate case is illegally opened. For the purpose.

  In order to achieve such an object, an unauthorized opening prevention mechanism for a substrate case according to the present invention includes a case body member and a case lid member that is attached to the case body member so as to be openable and closable. In a case where a control board for controlling an electronic component mounted on a gaming machine is housed inside a case formed by mounting the lid member in a closed state, the case body member is provided at a side end of the case body member. A main body side engaging portion formed with a main body side opening (for example, a main body side receiving hole 77 in the embodiment) that opens to a surface facing the case lid member when the case lid member is attached to the case lid member; When the case lid member is attached to the member, it is provided on the side wall portion of the case lid member via the coupling portion so as to face and oppose the main body side engaging portion, and is connected in alignment with the main body side opening portion. A lid-side engaging portion in which a lid-side opening portion (for example, the lid-side receiving hole 87 in the embodiment) penetrating through is formed, a shaft portion that is inserted into and accommodated in the opening portion, and a pin that is formed in the shaft portion A lock pin provided in the housing portion so as to be able to advance outward in the radial direction of the shaft portion, and an operation portion that is formed at a diameter larger than the shaft portion at the end portion of the shaft portion and cannot be inserted into the opening portion. When the part is inserted into the lid side opening and the body side opening, the lock pin that has advanced outward in the radial direction of the shaft part engages with the pin engagement hole provided in the body side opening, A locking member that holds the case lid member in a closed state by connecting the joint portion and the lid side engaging portion to the case main body member, and the coupling portion is curved in an arc around a predetermined axis It has an outer peripheral curved surface and is connected to the side wall portion of the case lid member at one end side in the predetermined axial direction and at the other end side in the predetermined axial direction. It is connected to the side engaging part, and the corner on one end where the outer peripheral curved surface of the connecting part intersects the side wall part of the case lid member is recessed in an arc shape to smoothly connect the outer peripheral curved surface and the side wall part. To do.

  In the above-described invention, the connecting portion is preferably formed by mixing or sticking to the surface a fine piece of metal foil (for example, lame in the embodiment).

  Further, in the above-described invention, the lid side engaging portion is configured to operate the lock member in a state where the shaft portion of the lock member is inserted into the main body side opening and the lid side opening and the lock pin and the pin engaging hole are engaged. It is preferable to have a lid-side rib that extends in an arc shape along the outer periphery of the portion and surrounds the periphery of the operation portion.

  In the above-described invention, the main body side engaging portion may be the main body side engaging portion when the case main body member is mounted with the case lid member and the main body side engaging portion and the lid side engaging portion are in close proximity to each other. It is preferable to have a main body side rib that covers the periphery of the surface facing the lid side engaging portion.

  In the above-described invention, the main body side engaging portion is configured such that the case main body member is mounted with the case lid member, the main body side engaging portion and the lid side engaging portion are opposed to each other, and the shaft portion of the lock member is the main body. A thin plate that is inserted into the side opening and the lid side opening and is erected at substantially the same height as the operation portion of the lock member outside the lid side engagement portion with the lock pin and the pin engagement hole engaged. It is preferable to have a standing wall.

  In the unauthorized opening prevention mechanism for a substrate case according to the present invention, the connecting portion has an outer peripheral curved surface that is curved in an arc around a predetermined axis, and is connected to the side wall portion of the case lid member at one end side in the predetermined axial direction. Is connected to the lid-side engaging portion at the other axial end side, and a corner portion on one end side where the outer peripheral curved surface of the connecting portion intersects the side wall portion of the case lid member is recessed in an arc shape to form the outer peripheral curved surface and the side wall The parts are connected smoothly. Therefore, even if a cutting tool (for example, a tool such as a nipper or a cutter) is brought into contact with the corner in an attempt to cut the connecting portion that connects the case lid member and the lid-side engaging portion, the cutting tool follows the arc of the corner. Therefore, it is difficult to cut the joint portion between the outer peripheral curved surface of the connecting portion and the side wall portion of the case lid member by sliding toward the outer peripheral curved surface side (that is, the corner portion acts as a sliding surface). In addition, since the connecting portion itself is formed to have an outer peripheral curved surface that is curved in an arc shape, even if the cutting tool is brought into contact with the outer peripheral curved surface, the contact length cannot be sufficiently secured, and the axial direction or outer periphery of the connecting portion Slippery along the direction. Therefore, it is very difficult to cut the connecting portion smoothly due to these synergistic effects, and the cut surface is formed uneven or cracks etc., and the trace when the connecting portion is cut is clear Therefore, the unauthorized opening of the substrate case can be detected at an early stage, and fraud can be effectively suppressed.

  Moreover, in the above-mentioned invention, it is preferable that the connection part is formed by mixing or sticking to the surface a fine piece of metal foil (for example, lame in the embodiment). According to this configuration, when the connecting portion is cut, a fine piece (lamé) of the metal foil falls off at the cut portion, and this portion remains clearly as a cut mark. Even if it is restored by adhering to it, it is possible to easily confirm the presence or absence of fraud simply by looking at the arrangement of the fine pieces (lamé) of the metal foil mixed or stuck in the connecting portion.

  Further, in the above-described invention, the lid side engaging portion is configured to operate the lock member in a state where the shaft portion of the lock member is inserted into the main body side opening and the lid side opening and the lock pin and the pin engaging hole are engaged. It is preferable to have a lid-side rib that extends in an arc shape along the outer periphery of the portion and surrounds the periphery of the operation portion. According to this configuration, since the periphery of the operation portion of the lock member is surrounded by the lid-side rib, unauthorized access to the lock member becomes difficult, and unauthorized access to the lock member can be strictly prevented.

  In the above-described invention, the main body side engaging portion may be the main body side engaging portion when the case main body member is mounted with the case lid member and the main body side engaging portion and the lid side engaging portion are in close proximity to each other. It is preferable to have a main body side rib that covers the periphery of the surface facing the lid side engaging portion. According to this configuration, since the opposing surface (boundary surface) between the main body side engaging portion and the lid side engaging portion is covered by the main body side rib, it is difficult to pry the case open from this opposing surface as a starting point. It is possible to more reliably prevent the case from being forcibly opened.

  Moreover, in the above-mentioned invention, it is preferable that the main body side engaging portion has a thin plate-like standing wall that stands up to substantially the same height as the operation portion of the lock member outside the lid side engaging portion. . According to this configuration, using a tool such as a screwdriver, external force is applied to the operation part of the lock member by the lever principle using the standing wall as a fulcrum, and the lock member is forcibly pulled out from the body side and the lid side opening. In such a case, if such a strong force is applied, the standing wall will be broken or cracked. Then, a trace of unauthorized access remains, and it can be easily and easily confirmed that there has been unauthorized access.

It is a front view of the pachinko machine shown as an example of the gaming machine to which the unauthorized opening prevention mechanism according to the present invention is applied. It is a rear view of the pachinko machine. It is a perspective view of a substrate case in a state where the case is closed. It is a disassembled perspective view of a substrate case. It is a side view of a substrate case. It is a rear view of a substrate case. It is a figure for demonstrating the attachment state of the case cover member with respect to a case main body member. It is a perspective view of an unauthorized opening prevention mechanism. It is a side view of an unauthorized opening prevention mechanism. It is sectional drawing of the XX arrow in FIG. It is a perspective view of a main body side engaging part. It is a sectional side view of a main body side engagement auxiliary | assistance part. It is a perspective view of a lid side engaging part. It is a principal part side view of the unauthorized opening prevention mechanism seen in the XIV arrow direction in FIG. It is a perspective view of a locking member. It is sectional drawing of the XVI-XVI arrow in FIG. It is a perspective view which shows a case sealing part. It is a front view of an IC tag sealing seal.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a front view and a rear view of a pachinko machine PM as a representative example of a gaming machine having a substrate case to which the present invention is applied. First, referring to these drawings, the pachinko machine PM An overview of the overall configuration will be described.

  In the pachinko machine PM, the front frame 2 for opening and closing mounted on the front surface of the outer frame 1 that is configured to have a rectangular frame size and forms a vertically fixed holding frame is arranged on the front surface of the opening and closing mounted to each other. The outer frame is supported by the hinge mechanisms 3a and 3b disposed on the left side of the front and is attached to the front so as to be openable and detachable. 1 is held closed.

  A glass door 5 having a square shape matched to the front area of the front frame 2 and a double-glazed glass mounted at the center is provided on the front side upper part of the front frame 2 by hinge mechanisms 7a and 7b provided on the left side of the front. It is supported so that it can be opened / closed and attached / detached sideways, and is held in a closed state covering the upper front of the front frame 2 by the locking device 4. An accommodation frame (not shown) for accommodating the game board 10 in an upright posture is formed integrally with the front frame 2 behind the glass door 5, and the game board 10 is detachably accommodated and held in the accommodation frame. The game area can be seen through the glass door 5 that is normally held closed.

  In FIG. 1, the description of the game board 10 is omitted, but a substantially circular game area is defined on the front surface of the game board 10 by being surrounded by upper and lower rail decorations, and a windmill and a lot of game nails are formed in this game area. Various components such as an image display device that displays a predetermined image according to a variety of prizes and the progress of the game are attached. At the lower end of the game area, an out port is provided through the game board 10 in the front-rear direction for discharging the dropped game ball to the back side of the game board 10 without falling into the winning tool.

  In the lower region of the front frame 2, the ball tray unit 6 is supported by a hinge mechanism 7 b, 7 c provided on the left side of the front side so that it can be opened and closed sideways and attached and detached. The device is used to hold the lower front surface of the front frame 2 in a closed state. An auxiliary mechanism portion called a game assisting board is provided in the lower region of the front frame 2 covered with the ball tray unit 6, and a game ball launching device for launching a game ball on the game assisting board, A foul ball collection passage for collecting foul balls that have returned without reaching the area is provided. A launching handle 8 for performing a launching operation of the game ball is attached to the front lower portion of the front frame 2.

  A back set board 20 is detachably attached to the back side of the front frame 2. The back set board 20 has a large window 21w through which an image display device, an image control board, and the like projecting from the back side of the game board 10 are inserted, and has a rectangular frame shape somewhat smaller than the inner size of the outer frame 1. The formed base frame body 21 is used as a base. In each part of the base frame body 21, a plurality of game balls stored in the ball storage tank are aligned in a row in the flow-down process, and the aligned state in which the game balls aligned by the rectification mechanism 50 are connected vertically. Alignment waiting passage 22 for waiting in the game, a ball payout device 23 for paying out game balls waiting in the alignment waiting passage 22 based on establishment of a predetermined winning condition, and a game ball paid out from the ball payout device 23 A prize ball mechanism including a payout passage leading to 6 ball trays is provided.

  In addition, in each part on the back side of the base frame 21, the operation of the power supply board 31 that supplies power to each part of the pachinko machine PM, the payout control board 32 that controls the operation of the ball payout device 23, and the operation of the pachinko machine PM are integrated. The main control board 33 that controls the image, the image control board 35 that controls the operation of the image display device, the terminal board 37 that inputs and outputs ball payout information and alarm display with the hall computer of the game facility, etc. Various control boards for controlling the electronic components mounted on the machine are attached, and these control boards and the electric / electronic parts of each part of the pachinko machine PM are connected by a wire harness so as to be playable. Each control board is mounted in a state of being accommodated in a transparent board case in order to prevent unauthorized modification.

  In the pachinko machine PM generally configured as described above, the control board such as the main control board 33 and the payout control board 32 is replaced with a counterfeit ROM having an increased probability of so-called jackpot, or a pseudo payout command. It is easy to be subject to remodeling for the purpose of illegal gain, such as adding an illegal circuit that outputs a signal. Therefore, the substrate case that accommodates such a control board is configured to be able to be locked in a closed state in which the control board is accommodated and held inside the case. An unauthorized opening prevention mechanism is provided that cannot be opened, that is, a structure in which a trace (history) remains when the case is opened.

  FIGS. 3 to 7 are diagrams showing the main configuration of the unauthorized opening preventing mechanism 60 for the substrate case according to the present invention. 3 is a perspective view of the substrate case with the case closed, FIG. 4 is an exploded perspective view of the substrate case, FIG. 5 is a side view of the substrate case, FIG. 6 is a rear view of the substrate case, and FIG. It is a figure for demonstrating the attachment state of the case cover member with respect to a main body member. The size, shape, mounting orientation (front / back / up / down / left / right directions) of the board case, etc. are the shape and dimensions of the control board accommodated in the case, the mounting position of the gaming machine to which the board case is attached, It can be arbitrarily set according to the arrangement posture and the like. Therefore, in this embodiment, for convenience of explanation, directions in which the arrows F, R, and U shown in FIG. 4 face are respectively referred to as front (Front), right (Right), and upward (Up).

  The board case BC includes a case body member 40 that is attached to and detached from the back side of the game board 10, and a case lid member 50 that is detachably attached to the front of the case body member 40. An unauthorized opening prevention mechanism 60 is provided at the right end portion of the case that is aligned in the front-rear direction when the case 50 is closed with the case 50 closed. For example, the main control board 33 described above is accommodated in the case formed in the closed state of the board case BC.

  As shown in FIG. 4, the main control board 33 has electronic components such as a CPU 33a arranged at the center of the board surface and connection connectors 33b arranged on the left and right sides, and the back side surface is made of copper. The reflow surface is soldered to the foil, and this reflow surface is opposed to the bottom of the case body member 40. Positioning pins 33c are formed at four locations in the vicinity of the edge of the control board 33, and are fitted with pin holes (not shown) drilled on the back side of the case lid member 50. It is fixed by etc.

  The case body member 40 has a rectangular box shape with an opening on the front side, and is integrally formed by a molding means such as injection molding using a transparent material such as ABS resin or polycarbonate (PC). The As shown in FIG. 4, reinforcing ribs 41 a are formed in a lattice shape vertically and horizontally on the bottom 41 of the case body member 40 to improve the strength of the case body member 40.

  Upper and lower side wall portions of the case main body member 40 (in FIG. 4, side wall portions erected forward from the upper and lower edge portions of the bottom portion 41) 43 and 43 protrude forward from the bottom portion 41 respectively. A plurality of plate-like locking projections 44 are formed.

  The case lid member 50 has a rectangular box shape covering the opening of the case main body member 40, and is integrally formed by a molding means such as injection molding using a transparent resin material such as ABS resin or polycarbonate (PC). Formed. The case lid member 50 is formed with a connector insertion / extraction opening 51. As shown in FIG. It is exposed to the outside.

  Each of the upper and lower side wall portions 53, 53 erected rearward from the vertical edge of the case lid member 50 opens to the rear side along the direction (left-right direction) in which the side wall portion 53 extends. A lid member attaching groove 54 (see FIGS. 5 and 7) into which the locking protrusion 44 of the main body member 40 can be inserted is formed. A locking wall portion 55 (see FIGS. 5 and 7) that can be engaged with the locking protrusion 44 of the case body member 40 is formed in the lid member mounting groove 54. The same number of the locking projections 44 is formed, and the arrangement interval thereof also corresponds to the locking projections 44.

  In such a substrate case BC, when the case lid member 50 is attached to the case body member 40, the case body member 40 and the case lid member 50 are first shifted in the left-right direction as shown in FIG. 7C, after the engaging projection 44 of the case body member 40 is inserted into the lid mounting groove 54 of the case lid member 50, as shown in FIG. 7B. In this manner, the case lid member 50 is slid in the left-right direction (rightward in FIG. 7) to engage the locking projection 44 with the locking wall portion 55. At this time, a main body side temporary fixing portion 46 is formed on the right end side of the case main body member 40, and a lid side temporary fixing portion 56 is formed on the right end portion of the case lid member 50. When the case lid member 50 is attached to the case main body member 40, the positions of the main body side temporary fixing portion 46 and the lid side temporary fixing portion 56 are brought into an engaged state, and the case lid member 50 is engaged with the case main body. The movement to the left with respect to the member 40 is regulated. The case body member 40 and the case lid member 50 are both formed of a resin material as described above, and the body side temporary fixing portion 46 and the lid side temporary fixing portion 56 are formed in a thin shape. Can be bent easily. Therefore, by bending the lid side temporary fixing part 56 away from the main body side temporary fixing part 46, the engagement between the main body side temporary fixing part 46 and the lid side temporary fixing part 56 is released, and the case main body member 40 is On the other hand, the case lid member 50 can be slid leftward to remove the case lid member 50 from the case body member 40.

  The unauthorized opening prevention mechanism 60 includes a main body side engaging portion 70 formed to be connected to the right side wall portion 47 of the case main body member 40 and a lid formed to be connected to the right side wall portion 57 of the case lid member 50. The side engaging portion 80 and a lock member 90 for connecting the main body side engaging portion 70 and the lid side engaging portion 80 are provided. 8 is a perspective view of the unauthorized opening prevention mechanism 60, FIG. 9 is a side view of the unauthorized opening prevention mechanism 60, FIG. 10 is a cross-sectional view taken along the line XX in FIG. 8, and FIG. FIG. 12 is a side sectional view of the main body side engagement assisting portion, FIG. 13 is a perspective view of the lid side engagement portion 80, and FIG. 14 is a schematic view of the substrate case BC viewed in the direction of the arrow XIV in FIG. FIG. 15 is a perspective view of the lock member 90, and FIG. 16 is a cross-sectional view taken along arrow XVI-XVI in FIG.

  As shown in FIG. 11, the main body side engaging portion 70 includes a main body side accommodation portion 71 provided integrally with the case main body member 40 and a main body side engagement assisting portion 75 provided on the main body side accommodation portion 71. And is configured. The main body side accommodating portion 71 is formed in a rectangular box shape, and a main body side engagement assisting portion 75 is embedded in the main body side accommodating portion 71 by insert molding. A plate-like standing wall 72 projecting upward is formed in the main body side accommodating portion 71 so as to extend in the left-right direction (in the present embodiment, a total of three standing walls 72 are formed). A pair of plate-like body side ribs 73 are formed inside the adjacent standing wall 72. The main body side rib 73 is provided in parallel to the standing wall 72, and when the case cover member 50 is attached to the case main body member 40, the main body side rib 73 is sandwiched between the pair of main body side ribs 73 with almost no gap. The side engaging portion 80 is held. The standing wall 72 is formed slightly higher than the main body side rib 73, and its plate thickness is formed thinner than the main body side rib 73. Further, a substantially U-shaped locking arm 74 protruding forward is provided on the outer surface of the right end wall of the main body side accommodating portion 71.

  As shown in FIG. 12, the main body side engagement assisting portion 75 is made of a sheet metal that closes the rear surface side of the housing member 76 that is formed in a substantially cylindrical shape using a metal material such as an aluminum alloy, for example. The bottom plate 78 is caulked and fixed to the housing member 76 and is integrally provided in the body side housing portion 71 by insert molding when the case body member 40 is molded.

  The housing member 76 is formed with a circular hole-shaped body-side receiving hole 77 through which the shaft portion 92 of the lock member 90 is fitted at the center thereof. The body-side receiving hole 77 has a pin introduction hole 77a having a slightly larger diameter than the shaft portion 92 of the lock member 90, and a pin engagement hole 77b having a diameter larger than the pin introduction hole 77a connected to the pin introduction hole 77a. A flat regulation wall 77c is formed at the step portion between the pin introduction hole 77a and the pin engagement hole 77b. Further, the bottom surface of the housing member 76 is caulked and fixed in a state where a disc-shaped bottom plate 78 is fitted, and the bottom surface of the housing member 76 (main body side receiving hole 77) is closed. Then, the housing member 76 and the bottom plate 78 that are integrally coupled in this way are mounted on the mold of the case body member 40 and are insert-molded, and are aligned with the lid-side engaging portion 80 in the case closed state, and back and forth. A main body side engagement assisting portion 75 to be superimposed is formed on the main body side engaging portion 70.

  On the other hand, as shown in FIG. 13, the lid-side engaging portion 80 is configured with a lid-side accommodating portion 81 provided integrally with the case lid member 50 as a base. The lid side accommodating portion 81 is formed in a rectangular block shape, and is configured to align with the main body side accommodating portion 71 and overlap in the front-rear direction when the case lid member 50 is attached to the case main body member 40. The main body side accommodating portion 81 is formed with a circular lid-like receiving hole 87 through which the shaft portion 92 of the lock member 90 is inserted at the center. Further, the lid-side receiving hole 87 has a groove shape that is slightly larger than the pin diameter of the lock pin 95 of the lock member 90 described later, and the groove bottom surface is inclined toward the inside of the lid-side receiving hole 87. The guide groove 88 is formed. Around the lid-side receiving hole 87, a pair of lid-side ribs 83 that are concentric with the lid-side receiving hole 87 and curved in an arc shape protrude forward. A plate-like locking piece 84 that can engage with the locking arm 74 of the main body side engaging portion 70 is formed on the outer surface of the right end wall of the lid side accommodating portion 81 so as to protrude outward.

  The lid side engaging portion 80 is connected to the right side wall portion 57 of the case lid member 50 via a substantially semi-cylindrical connecting portion 85. As shown in FIG. 14, the connecting portion 85 has an outer peripheral curved surface (semi-cylindrical curved surface) 85 a that is curved in an arc around a predetermined axis (axis extending in the left-right direction) C. One end side in the direction of the axis C Is connected to the side wall portion 57 of the case lid member 50 and is connected to the lid side engaging portion 80 on the other end side in the axis C direction. At a portion where the outer peripheral curved surface 85a of the connecting portion 85 and the side wall portion 57 of the case lid member 50 intersect, a corner 86 that is recessed in an arc shape with a predetermined radius of curvature and smoothly connects these along the circumferential direction of the outer curved surface 85a. Is formed. Further, the outer peripheral curved surface 85a of the connecting portion 85 is connected to the base side (left side) lid-side rib 83 of the case-side engaging portion 80, and the outer peripheral curved surface 85a and the lid-side rib 83 are substantially flat on the surface side. They are connected smoothly so that they become one. In addition, the connection part 85 is comprised so that cutting | disconnection is possible, and, thereby, the cover side engaging part 80 is separable from the case cover member 50. FIG.

  As shown in FIGS. 15 and 16, the lock member 90 includes a lock body 91 having a shaft portion 92 extending in the front-rear direction and an operation portion 93 formed at the front end of the shaft portion 92, and a lock on the rear end side of the shaft portion 92. A lock pin 95 that is supported so as to be slidably displaceable in a direction orthogonal to the central axis 91X of the main body 91 and a coil spring 96 that urges the lock pin 95 outward of the shaft portion are mainly configured.

  The lock body 91 has a cylindrical shaft portion 92 extending in the front-rear direction, and an operation portion 93 formed in a disk shape having a larger diameter than the shaft portion 92 at the front end of the shaft portion 92. For example, an aluminum alloy or copper It is integrally formed using a metal material such as an alloy. At the rear end side of the shaft portion 92, a cylindrical pin housing portion that accommodates and holds a lock pin 95 so as to be slidably displaceable in an axial direction along the axis 95X of this pin (a direction orthogonal to the center line 91X of the lock body 91). 94 is provided. Note that the lock pin 95 will be described with the upper end side in the disposition posture shown in FIG. 16 as the distal end side and the lower end side as the proximal end side.

  The lock pin 95 includes an elongated shaft-shaped shaft pin 95a and a short cylindrical seat portion 95b formed in a middle diameter of the shaft pin 95a and having a diameter larger than that of the shaft pin 95a. It is integrally formed using a material. The pin accommodating portion 94 that accommodates the lock pin 95 has a bottomed cylindrical seat accommodating hole 94a that has a slightly larger inner diameter than the seat 95b of the lock pin 95 and is formed in the shaft portion 92 in the direction perpendicular to the axis. A pin support hole 94b formed coaxially through the bottom of the seat receiving hole 94a with an inner diameter slightly larger than the shaft pin 95a, and formed in a thin annular shape on the inlet opening side of the seat receiving hole 94a And the crimped portion 94c.

  Further, the lock pin 95 accommodates the coil spring 96 in the seat receiving hole 94a, and the base end side of the shaft pin 95a of the lock pin 95 is inserted into the pin support hole 95b and the seat 95b is inserted into the seat receiving hole 94a. By inserting and crimping the caulking portion 94c in a state where the coil spring 96 is compressed in the axial direction to reduce the diameter, the coil spring 96 is attached to the pin accommodating portion 94 of the shaft portion 92. When the lock pin 95 is thus mounted, the lock pin 95 is supported so as to be slidable within a predetermined range in the axial direction of the pin, and the distal end side of the shaft pin 95a is always outside the shaft portion 92 by the spring force of the coil spring 96. It is arranged to be biased so as to protrude in the direction. The length of the lock pin 95 is shorter than the outer diameter of the shaft portion 92 of the lock body 91. When the distal end side of the lock pin 95 is pushed inwardly into the shaft portion 92, the base end side of the lock pin 95 is pin-supported. It does not protrude into the shaft portion 92 by being accommodated in the hole 94b (that is, the entire lock pin 95 is accommodated in the pin accommodating portion 94). Instead of the coil spring 96, a biasing means such as a leaf spring or a disc spring may be used.

  One lock member 90 configured as described above is used for one set of the main body side engaging portion 70 and the lid side engaging portion 80, but as illustrated in the present embodiment, the substrate case In the configuration in which two sets of main body side engaging portions 70 and 70 and lid side engaging portions 80 and 80 are provided on the BC, a total of two lock pins 90 and 90 are required. Therefore, when any one set of the main body side engaging portion 70 and the lid side engaging portion 80 is engaged using the lock member 90, the unused lock member 90 (hereinafter referred to as "preliminary") to be used next time is used. In order to store the lock member 90 </ b> Y ”, a reserve lock member storage portion 100 is provided on the right end side of the substrate case BC.

  The auxiliary lock member accommodating portion 100 includes a main body side auxiliary accommodating portion 110 formed to be connected to the right end side of the case main body member 40 and a lid side auxiliary accommodating portion formed to be connected to the right end side of the case lid member 50. 120, the spare lock member 90Y can be housed therein.

  As shown in FIG. 11, the main body side preliminary accommodating portion 110 is formed in a substantially rectangular block shape, and has a hole diameter somewhat larger than the outer diameter of the shaft portion 92 of the lock member 90 at the center (that is, A circular preliminary storage hole 111 (having a hole diameter into which the shaft portion 92 of the lock member 90 can be inserted) is formed. A key groove-like pin receiving groove 112 for receiving the lock pin 95 of the lock member 90 is formed on the inner peripheral surface of the preliminary accommodating hole 111. Further, a plate-like side wall 113 is formed on the right side edge of the main body side preliminary accommodating portion 110 so as to protrude forward.

  As shown in FIG. 13, the lid-side preliminary accommodating portion 120 has a front wall 121 and a pair of side walls 122, 122 extending rearward across the front wall 121, and as a whole, a cover body that is U-shaped in a side sectional view. Configured as In a state where the shaft portion 92 of the lock member 90 is inserted into the preliminary accommodating hole 111 of the main body side preliminary accommodating portion 110, the operation portion 93 of the lock member 90 is exposed to the outside, but the case lid member 50 is attached to the case. When mounted on the main body member 40 and the main body side preliminary accommodating portion 110 and the lid side preliminary accommodating portion 120 are overlapped, the operation portion 93 is covered by the side wall 113, the front wall 121, and the side walls 122, 122. The entire lock member 90 (preliminary lock member 90Y) is accommodated in the preliminary lock member accommodating portion 100.

  Furthermore, the unauthorized opening prevention mechanism 60 according to the present embodiment includes a case sealing portion 130 on the left end side of the substrate case BC, and this configuration will be outlined with reference to FIGS. 17 to 18. The case sealing part 130 is detachably attached to the main body side sealing part 140 integrally connected to the case main body member 40, the lid side sealing part 150 integrally connected to the case lid member 50, and both the sealing parts 140, 150. And a protective cover 170 to be formed. The main body side sealing portion 140 and the lid side sealing portion 150 are in contact with each other in a state where the case lid member 50 is closed as shown in FIG. At the seam, there is a concavo-convex boundary 131 such that the two seals 140 and 150 are alternately meshed with each other.

  The main-body-side sealing part 140 and the lid-side sealing part 150 are formed in a substantially rectangular box shape having openings on the surfaces facing each other, and both the sealing parts 140 and 150 are coupled by a fixing screw 132. The main body side sealing portion 140 is provided with a screw hole (not shown) into which the fixing screw 132 can be screwed, and the lid side sealing portion 150 is provided with an insertion hole 151 penetrating front and back coaxially with the screw hole. The main body side sealing portion 140 and the lid side sealing portion 150 are coupled by screwing the fixing screw 132 into the screw hole from the front side of the lid side sealing portion 150 through the insertion hole 151. In a state where both the sealing portions 140 and 150 are coupled by the fixing screw 132, the IC tag sealing seal 160 is attached so as to conceal the head of the fixing screw 132 and straddle the boundary portion 131.

  As shown in FIG. 18, the IC tag seal seal 160 is configured by providing a rectangular sheet-like seal member 161 with an IC tag 162 and an antenna line 163 connected thereto. The IC tag 162 is a very small electronic element that stores various information such as information related to the pachinko machine PM and identification information of the control board 33, and is connected to the antenna line extending along the diagonal line of the seal member 161. Information can be read from the outside of the substrate case BC using a reader (not shown) via the H.163. Examples of the sealing member 161 include paper, plastic film, cloth, and metal plate. The antenna wire 162 is formed with a slit for forming a loop for transmitting information by radio waves, and a notch 164 is provided in the vicinity of the slit. As a result, when the IC tag seal seal 160 is peeled off or an external force is applied to the IC tag seal seal 160, the antenna wire 163 may be damaged, making it impossible to transmit information and leaving a trace of unauthorized access. it can.

  The lid side sealing portion 150 is formed with a case rib 152 for partitioning a sticking area of the IC tag sealing seal 160. The case rib 152 is formed to project at a position along the side of the IC tag seal seal 160. By positioning the IC rib seal seal 160 in alignment with the case rib 152, the antenna wire 163 is fixed to the fixing screw 132 ( The head is located immediately above the head.

  The protective cover 170 is configured to be engageable with both the sealing portions 140 and 150, and is attached to the both sealing portions 140 and 150 so as to cover the entire IC tag sealing seal 160. The protective cover 170 is formed by a molding means such as injection molding using a transparent resin material such as ABS resin or polycarbonate (PC), and the IC tag sealing seal 160 is sealed even when the IC tag sealing seal 160 is covered from the outside. The serial number written on the seal 160 is visible.

  The specific operation of the unauthorized opening prevention mechanism 60 configured as described above will be briefly described below. Here, a case where the substrate case BC is locked and held using the unauthorized opening prevention mechanism 60 with respect to the unused substrate case BC will be described. In the unused substrate case BC, all of the plurality of lock members 90 are unused, and the lock member 90 (preliminary lock member 90Y) that is not used this time is preliminarily reserved as a preliminary accommodating hole 111 of the main body side preliminary accommodating portion 110 as a spare part. Insert it in.

  The case lid member 50 is assembled to the case main body member 40 by closing the case lid member 50 so as to cover the case main body member 40 from the front at a position slightly shifted to the left with respect to the case main body member 40, and to the right. And the engagement protrusion 44 of the case body member 40 and the engagement wall portion 55 of the case lid member 50 are engaged with each other. When the case lid member 50 is attached to the case main body member 40 in a closed state, the main body side preliminary accommodating portion 110 and the lid side preliminary accommodating portion 120 are overlapped in the front-rear direction, and the main body side sealing portion 140 and the lid are covered. The side sealing part 150 is overlapped facing front and back. Further, the lid side engaging portion 80 is overlapped with the main body side engaging portion 70 so as to oppose the front and rear, and the lid side receiving hole 87 and the main body side receiving hole 77 are coaxially connected to the front and rear.

  In order to lock the case lid member 50 in a closed state with respect to the case main body member 40, in order to restrict the sliding movement of the case lid member 50 attached to the case main body member 40 to the left (withdrawal direction), The lock member 90 is inserted into the lid side receiving hole 87 and the main body side receiving hole 77 and the main body side engaging portion 70 and the lid side engaging portion 80 are engaged with each other. In order to insert the lock member 90 into the receiving holes 77 and 87, first, the lock pin 95 of the lock member 90 and the guide groove 88 are aligned, and then the shaft portion 92 of the lock member 90 is moved to the lid side receiving hole. Insert into 87 through opening. When the shaft portion 92 of the lock member 90 is inserted into the lid-side receiving hole 87, the distal end side of the lock pin 95 that protrudes outward from the shaft portion 92 of the lock member 90 becomes the groove bottom surface (inclined surface) of the guide groove 88. The lock pin 95 is brought into sliding contact and gradually pushed into the pin accommodating portion 94 against the spring force of the coil spring 96 while receiving the action of the inclined surface, so that the lock pin 95 is the end portion of the lid side receiving hole 87. When reaching the boundary portion between the lid-side receiving hole 87 and the main body-side receiving hole 77, the lock pin 95 moves backward in the pin accommodating portion 94 to a position where it is substantially flush with the outer peripheral surface of the shaft portion 92. To do. Accordingly, the shaft portion 92 of the lock member 90 can smoothly enter the lid side receiving hole 87 into the main body side receiving hole 77 without being caught.

  When the shaft portion 92 of the lock member 90 is further inserted into the main body side receiving hole 77 from this state, and the lock pin 95 reaches the pin engaging hole 78b from the pin introducing hole 77a in the main body side receiving hole 77, the pin introducing hole 77a. Of the lock pin 95 is released outward by the spring force of the coil spring 96, and the tip of the lock pin 95 is regulated by the pin engagement hole 77b in the pin engagement hole 77b. Engages with wall 77c. Therefore, the lock member 90 is restricted from moving forward (withdrawal direction) by the engagement of the lock pin 95 and the restriction wall 77c, and is moved backward by the contact between the operation portion 93 and the lid-side engagement portion 80. Is held in a restricted position (hereinafter referred to as “lock position”).

  When the lock member 90 is set to the lock position in this manner, the main body side engaging portion 70 and the lid side engaging portion 80 are engaged and connected by the lock member 90, and the case main body member 40 and the case lid member 50 are closed. Are joined together. In this closed state, the movement of the lock member 90 in the forward direction (withdrawal direction) is restricted by the engagement between the lock pin 95 and the restriction wall 77c, and it is very difficult to pull out the lock member 90 forward. Further, since the shaft portion 92 of the lock member 90 is fitted over the lid-side receiving hole 87 and the main body-side receiving hole 77, the case lid member 50 cannot be slid with respect to the case main body member 40. Is possible. Therefore, by engaging and connecting the lock member 90 to the main body side engaging portion 70 and the lid side engaging portion 80 in this way, the substrate case BC is held in a firm closed state. Since the resistance to such strong opening is increased, the board case BC cannot be illegally opened, and an illegal act (unauthorized access) to the control board 33 disposed in the board case BC is prevented. Is possible.

  In particular, in the unauthorized opening prevention mechanism 60, the lock main body 91, the lock pin 95, the main body side engagement assisting portion 75 (auxiliary member 76, bottom plate 78) and the like are formed of a metal material, so that the structure is small and compact. It is possible to realize a structure having a high resistance to a strong pry-up and to make a hole from the side of the main body side engaging portion 70 by a mechanical means such as a drill or by a heating means such as a soldering iron or a heat cutter. It is possible to effectively prevent an illegal act such as opening a hole and releasing the engagement between the lock pin 95 and the pin engagement hole 77b.

  In addition, the main body side rib 73 is erected so as to sandwich the cover side engaging portion 80 in a state where the main body side engaging portion 70 and the cover side engaging portion 80 are overlapped in the front-rear direction. 70 and the lid-side engaging portion 80 are covered with a boundary surface (opposing surface), so that it is difficult to pry the case open from this boundary surface, and the substrate case BC is forcibly opened. It can prevent more reliably.

  Further, in a state where the lock member 90 is engaged with the main body side engaging portion 70 and the lid side engaging portion 80, the lid side engaging portion 80 is formed in an arc shape along the outer periphery of the operation portion 93 of the lock member 90. Since the lid side rib 83 is erected and surrounds the periphery of the operation portion 93 of the lock member 90, unauthorized access to the lock member 90 becomes difficult, and unauthorized access to the lock member 90 can be strictly prevented. become. The height of the lid-side rib 83 is substantially the same as or somewhat higher than the operation portion 93 of the lock member 90 so that the lock member 90 can be operated and unauthorized access becomes difficult. Is preferred.

  In addition, the lock member 90 is located on the side of the operation portion 93 of the lock member 90 and is substantially the same as the operation portion 93 of the lock member 90 in a state where the lock member 90 is engaged with the main body side engagement portion 70 and the lid side engagement portion 80. A thin plate-like standing wall 72 having a standing height is provided. Using a tool such as a screwdriver, external force is applied to the operation portion 93 of the lock member 90 based on the lever principle using the standing wall 72 as a fulcrum. In addition, when the lock member 90 is forcibly pulled out from the receiving holes 77 and 87, if such a strong force is applied, the standing wall 72 is broken or cracked. Then, a trace of unauthorized access remains, and it can be easily and easily confirmed that there has been unauthorized access.

  Further, in a state where the lock member 90 is set at the lock position in the receiving holes 77 and 87, the lock member 90 is restricted from moving in the insertion / removal direction (back and forth movement), but is rotated around its center line 91X. Since the movement is permitted, if the lock member 90 is pulled out from the receiving holes 77 and 87 by unauthorized means, and then the locking member 90 is returned to the receiving holes 77 and 87 again, the illegal action The facts can be easily discovered. That is, when the lock member 90 is forcibly pulled out, there is a high possibility that the lock pin 95 of the lock member 90 is broken, so that the lock member 90 is returned to the receiving holes 77 and 87 again in order to conceal fraud. Even if the lock main body 91 of the lock member 90 is fixed to the lid-side engagement portion 80 with an adhesive or the like to appear to be in the original engagement state, the lock member 90 is fixed to the lid-side engagement portion 80 and the center line It cannot be rotated around 91X. Therefore, by confirming the rotation of the lock member 90 in this way, it can be easily confirmed whether or not there has been unauthorized access. Similarly, in a state where the lock member 90 is set to the lock position in the receiving holes 77 and 87, the main body side engagement portion 70 and the lid side engagement portion 80 are cut by cutting the operation portion 93 of the lock member 90. When the board case BC is released by releasing the engagement, even if the operation portion 93 is fixed to the shaft portion 92 with an adhesive or the like in order to conceal this illegal act, there is almost no periphery around the shaft portion 92. Since there is no clearance, the adhesive applied to the operation portion 93 or the shaft portion 92 adheres to the lid-side engagement portion 80, and the lock member 90 and the lid-side engagement portion 80 are also fixed. As a result, even if the lock member 90 is to be rotated, the lock member 90 cannot be rotated. In this case as well, by confirming the rotation of the lock member 90, it is easy to trace the substrate case BC being opened illegally. Can be found in.

  On the other hand, in the preliminary lock member accommodating portion 100, when the case lid member 50 is closed by the case main body member 40, the main body side preliminary accommodating portion 110 and the lid side preliminary accommodating portion 120 abut against each other, and Until the substrate case BC is opened, the preliminary lock member 90Y is accommodated therein.

  Further, in the case sealing part 130, when the case lid member 50 is closed by the case main body member 40, the main body side sealing part 140 and the lid side sealing part 150 are in contact with each other and overlap each other. become. In the state where both the sealing portions 140 and 150 are superposed in this way, the case main body member 70 and the case lid member 80 are screwed together by inserting the fixing screw 132 through the insertion hole 151 and screwing it into the screw hole. The Then, after positioning the IC tag seal seal 160 by the case rib 152, the IC tag seal seal 160 is firmly attached so as to cover the fixing screw 132 and straddle the boundary 131 between the seal portions 140 and 150 in the concavo-convex engagement state. As described above, when the IC tag seal seal 160 is attached to the case rib 152, the antenna wire 163 is disposed immediately above the fixing screw 132. And, in order to protect the IC tag seal seal 160, by attaching the protective cover 170 so as to cover the whole of the main body side seal portion 140 and the lid side seal portion 150 to which the IC tag seal seal 160 is adhered, The substrate case BC is assembled. Then, the substrate case BC is attached to a case attachment portion (not shown) of the base frame body 21 in the back set board 20 using a Nylatch (registered trademark) 59 provided on the right side portion of the substrate case BC. .

  As can be understood from the above description, the case body member 40 is closed with the case lid member 50, the case body member 40 and the case lid member 50 are engaged with each other by the lock member 90, and the body side sealing is performed with the fixing screw 132. By fastening the portion 140 and the lid-side sealing portion 150 with screws, the substrate case BC is held in a stronger closed state. Then, the IC tag sealing seal 160 is held in the protective cover 170 by attaching the protective cover 170 to the main body side sealing portion 140 and the lid side sealing portion 150 that are in contact with each other. The IC tag sealing seal 160 has the IC tag 162 and the antenna wire 163 as described above, and is wirelessly connected to the IC tag 162 via the antenna wire 163 while being held inside the protective cover 170. Various stored information (for example, information about the pachinko machine PM, identification information of the main control board 33, etc.) can be read from the outside without opening the protective cover 170.

  Now, in order to open the substrate case BC held in such a strong closed state, the connecting portion 85 formed between the case lid member 50 and the lid side engaging portion 80 is cut by a cutting tool, The lid-side engaging portion 80 that is engaged with and connected to the main body-side engaging portion 70 is separated from the case lid member 50.

  At this time, when trying to cut the connecting portion 85 so as not to leave as much as possible traces of fraud, for example, the joint between the outer peripheral curved surface 85a of the connecting portion 85 and the side wall portion 57 of the case lid member 50 is smooth (flat). If it cut | disconnects in this way, after connecting the connection part 85 to the case cover member 50 along a cut surface after that, there exists a possibility that it may be restored | restored to the original state substantially so that a cutting trace may not remain, but this embodiment Then, since the corner 86 on one end side, which is the intersection of the outer peripheral curved surface 85a of the connecting portion 85 and the side wall portion 57 of the case lid member 50, is recessed in an arc shape to smoothly connect the two, Even if the cutting tool is brought into contact with 86, the cutting tool slides along the arc of the corner 86 toward the outer peripheral curved surface 85a (that is, the corner 86 acts as a sliding surface), and this joint portion can be cut. Have difficulty. Further, since the connecting portion 85 itself is formed in a semi-cylindrical shape, even if the cutting tool is brought into contact with the outer peripheral curved surface 85a of the connecting portion 85, the contact length cannot be sufficiently secured, or the connecting portion 85 in the axial direction or It becomes slippery along the outer peripheral direction. Therefore, it is very difficult to cut the connecting portion 85 smoothly due to these synergistic effects, and the cut surface is formed in an uneven shape or cracks, etc., and there is a trace when the connecting portion 85 is cut. Since it remains clearly, unauthorized opening of the substrate case BC can be detected at an early stage, and fraud can be effectively suppressed.

  Further, the lid-side rib 83 is formed at the intersection between the outer peripheral curved surface 85a of the connecting portion 85 and the lid-side engaging portion 80, and the outer peripheral curved surface 85a and the surface of the lid-side rib 83 are substantially flush with each other. Even if the cutting tool for cutting the connecting portion 85 is brought into contact with the intersecting portion of the two, the sliding position is not fixed. In this case, it is difficult to cut the joint portion between the two smoothly (flat). is there. Therefore, also in this case, a trace when the connecting portion 85 is cut can be clearly left.

  Further, even if the connecting portion 85 is cut and the lid side engaging portion 80 is separated from the case lid member 50, the case main body member 40 and the case lid member 50 are screwed together by the fixing screw 132 at the case sealing portion 130. Therefore, the substrate case BC cannot be opened unless the protective cover 170 is detached from the sealing portions 140 and 150 and the fixing screw 132 is removed. Here, in the state where the IC tag sealing seal 160 is positioned and pasted by the case rib 152 as described above, the antenna wire 163 is disposed immediately above the fixing screw 132, so that the coupling by the fixing screw 132 is released. In order to do this, if an attempt is made to access the fixing screw 132 from above the IC tag seal seal 160, the antenna line 163 is destroyed and information on the IC tag 162 becomes unreadable. Further, since the seal member 161 of the IC tag seal seal 160 has a hole due to unauthorized access, a trace of unauthorized opening of the substrate case BC remains more clearly.

  Therefore, according to the unauthorized opening prevention mechanism 60 as described above, when the substrate case BC is illegally opened, the trace of the illegal act remains clearly and reliably. It can be found and fraud can be effectively deterred.

  Here, two main body side engaging portions 70 and two lid side engaging portions 80 are provided on the right end sides of the case main body member 40 and the case lid member 50 respectively (that is, two sets). In order to connect the case main body member 40 and the case lid member 50 in a closed state by engaging and coupling the joint portion 70 and the lid side engaging portion 80, the main body side engaging portion 70 and the lid side engaging portion 80 are connected. Any one of these may be engaged by the lock member 90. Therefore, even if the connecting portion 85 of the lid side engaging portion 80 engaged with the main body side engaging portion 70 via the lock member 90 is cut, the other set can still be used, and the main control board 33 is maintained. When the substrate case BC in the closed state (engaged state) is properly opened for inspection or inspection, the substrate case BC is held in a firmly closed state using another set of the engaging portions 70 and 80. can do.

  At this time, as described above, the spare lock member accommodating portion 100 provided in the vicinity of the main body side engaging portion 70 and the lid side engaging portion 80 accommodates the unused spare lock member 90Y. When the substrate case BC is closed again by engaging another set of the main body side engaging portion 70 and the lid side engaging portion 80 using the lock member 90Y, the spare lock member 90Y is lost or searched. Therefore, it can be easily taken out and used when necessary, thereby improving work efficiency.

  In particular, the preliminary lock member 90Y is formed of a material of a different color with respect to the lock member 90 used for the first time (referred to as “preceding lock member 90S” for convenience of description), or the surface is colored with a different color. Thus, it is preferable to make the appearance colors different. In this way, when the lock member 90 is illegally destroyed and the main body side engaging portion 70 and the lid side engaging portion 80 are engaged and connected using another lock member 90, the appearance of the lock member 90 is displayed. Since it is possible to determine whether or not the lock member 90 is genuine simply by confirming the color, it is possible to detect unauthorized access to the lock member 90 at an early stage.

  In order to specifically explain this, for example, the preceding lock member 90S that engages and connects the first set of the main body side engaging portion 70 and the lid side engaging portion 80 is broken by an improper means to receive the receiving hole. Consider a case in which the vehicle is withdrawn from 77,87. Thus, when the preceding lock member 90S is detached, it becomes possible to open the substrate case BC illegally, but the preceding lock member 90S makes it possible to conceal the traces of fraudulent acts. Even if the side engagement portion 70 and the lid side engagement portion 80 are to be reengaged, the preceding lock member 90S that has been illegally detached has already been destroyed, so that another lock member 90 must be used. . At this time, even if it is attempted to restore the engaged state using the unused spare lock member 90Y accommodated in the spare lock member accommodating portion 100, the appearance color differs between the preceding lock member 90S and the spare lock member 90Y. There will be a clear trace of cheating. That is, since the appearance color of the lock member 90 (preceding lock member 90S) to be originally connected is different, it is possible to easily detect the presence or absence of unauthorized opening simply by confirming the appearance color. In this case, the trace can be recognized even if the preliminary locking member 90Y is not accommodated in the preliminary locking member accommodating portion 100.

  On the other hand, when a board case of the same type as the board case BC is separately obtained as a more clever technique, and the lock member 90 is taken out from the case and the above engagement state is restored, the preliminary lock member of the board case BC is obtained. Since the reserve lock member 90Y is naturally accommodated in the accommodating portion 100, it is not possible to confirm fraudulent traces only by confirming the contents of the reserve lock member accommodating portion 100. However, normally, this newly acquired case is also held in the closed state by the unauthorized opening prevention mechanism 60, so the main body side engaging portion 70 and the lid side engaging portion 80 are already connected using the preceding lock member 90S. Should be. Therefore, even if the preceding lock member 90S is forcibly exchanged from the case, it is only damaged, and in this case as well, it is only possible to acquire an unused spare lock member 90Y. Even if this spare lock member 90Y is used, Similar to the above, fraudulent traces remain clearly due to the difference in appearance color. Therefore, by simply changing the appearance colors of the plurality of lock members 90, it is possible to easily find out that this fraud has occurred even if the connected lock member 90 is illegally replaced with another lock member 90. Is possible.

  Although the preferred embodiments of the present invention have been described so far, the scope of the present invention is not limited thereto. For example, in the above-described embodiment, the connecting portion 85 formed between the case lid member 50 and the lid-side engaging portion 80 is integrated with the case lid member 50 and is a transparent resin material such as polycarbonate (PC). However, when forming the case lid member 50, fine pieces of metal foil may be mixed into the connecting portion by an insert mold. Here, examples of the metal foil include a gold foil, a silver foil, an aluminum foil, a hologram foil, and a metal film in which a metal material is formed as a deposited film on the surface of a resin film. For example, the metal foil is formed as a fine piece such as a rectangular parallelepiped shape, a plate shape, or a scale shape, and so-called “lamé” is preferably used as a decorative body that reflects light and shines. The lamé is formed of, for example, a fine piece of a metal film or a fine piece of a hologram foil (generally referred to as “hologram glitter”).

  Specifically, when the case lid member 50 is molded, a plurality of lamellas are regularly arranged and molded in the connecting portion by an insert mold. As for this regularity, it is exemplified that they are arranged at substantially equal intervals in the direction of the axis C or the circumferential direction of the connecting portion. In general, lame (particularly hologram lame) is strong against external force. Therefore, when the connecting part is cut, even if the resin part of this connecting part is cut, the lame is only bent and is not divided. When the adhesion between the resin and the resin part is exceeded, the lamé will bounce outward. Further, since the lam is a fine piece, it is difficult to return the lam to the original position after the lam falls off the connection. Therefore, when the connecting portion is cut, the lame falls off at the cut portion, and this portion remains clearly as a cut mark. Therefore, even if the cut connecting portion is adhered to the case lid member 50 and restored, It is possible to easily confirm the presence or absence of fraud by simply looking at the layout of the lame. In addition to regularly arranging a plurality of lamés, the color and pattern of the lamés may be changed depending on the arrangement to make it easier to find the cut traces.

  Note that a plurality of fine pieces (lamé) of the metal foil may be attached to the surface of the connecting portion with, for example, an adhesive or an ultraviolet curable resin. Also in this case, when the connecting portion is cut, the lame falls off at the cut portion, and this portion remains clearly as a cut mark. Therefore, even if the cut connecting portion is adhered to the case lid member 50 and restored. It is possible to easily confirm the presence or absence of fraud by simply looking at the arrangement of lamés on the surface of the connecting portion. Further, only a colored ultraviolet curable resin (preferably so-called “UV gel”) may be attached to the entire surface of the connecting portion without mixing lamé. At this time, it is preferable to ensure an appropriate adhesive force by polishing (buffing) the surface of the connecting portion to increase the surface area and applying an ultraviolet curable resin. When such a connecting portion is cut with a cutter or the like, the ultraviolet curable resin is broken on the surface and peeled off from the connecting portion, so that this portion remains clearly as a cut mark.

  In the above-described embodiment, only the corner portion 86 on one end side where the outer peripheral curved surface 85a of the connecting portion 85 and the side wall portion 57 of the case lid member 50 intersect is formed in a circular arc shape, but is not limited thereto. Instead, the corner portion on the other end side where the outer peripheral curved surface 85a of the connecting portion 85 and the lid-side engaging portion 80 intersect may be formed in an arc shape like the corner portion 86 on the one end side. .

  Further, in the above, the case where the unauthorized opening prevention mechanism is applied to the substrate case BC configured to slide and move in a state where the case lid member 50 is joined to the case body member 40 and to hold both in the closed state is illustrated. However, the present invention is not limited to this. For example, the unauthorized opening prevention mechanism may be applied to a substrate case having a configuration in which a case lid member is hingedly engaged with a case main body member and is swingably opened and closed to engage and hold both in a closed state.

  Further, in the above, an example in which the unauthorized opening prevention mechanism according to the present invention is applied to a main board case of a pachinko machine has been described, but the present invention is not limited thereto, and a board case configured in an image board assembly, The present invention may be applied to a substrate case configured in a power supply substrate assembly, and further, may be applied to a gaming machine other than a pachinko machine, for example, a control board case of a slot machine or other various cases.

PM Pachinko machine (game machine)
BC board case C axis 33 Main control board (control board)
40 Case body member 50 Case lid member 57 Side wall part 60 Unauthorized opening prevention mechanism 70 Body side engagement part 72 Standing wall 73 Body side rib 77 Body side receiving hole (body side opening)
77b Pin engaging hole 80 Lid side engaging part 83 Lid side rib 85 Connecting part 87 Lid side receiving hole (lid side opening)
86 Corner portion 90 Lock member 92 Shaft portion 93 Operation portion 94 Pin housing portion 95 Lock pin 100 Preliminary lock member housing portion 130 Case sealing portion

Claims (5)

A case body member, and a case lid member that is attached to the case body member so as to be openable and closable, and is attached to the gaming machine in a case formed by attaching the case lid member to the case body member in a closed state. In the board case that houses the control board that controls the mounted electronic components,
A main body side member provided at a side end of the case main body member, and formed with a main body side opening that opens on a surface facing the case cover member when the case cover member is attached to the case main body member. With the joint,
When the case lid member is attached to the case main body member, the case lid member is provided on the side wall portion of the case lid member via a connecting portion so as to face and close to the main body side engaging portion, and the main body side opening portion. A lid-side engaging portion formed with a lid-side opening that is aligned and connected to the front and back, and
A shaft portion that is inserted into and accommodated in the opening, a lock pin that is provided in a pin housing portion formed in the shaft portion so as to be able to advance radially outward of the shaft portion, and an end portion of the shaft portion An operating portion that has a larger diameter than the shaft portion and cannot be inserted into the opening portion, and when the shaft portion is inserted into the lid side opening portion and the body side opening portion, a radial direction of the shaft portion The lock pin that has advanced outwardly engages with a pin engagement hole provided in the opening on the main body side, and connects the main body side engaging portion and the lid side engaging portion to form the case main body. A lock member for holding the state where the case lid member is closed and attached to the member,
The connecting portion has an outer peripheral curved surface that is curved in an arc around a predetermined axis, and is connected to a side wall portion of the case lid member at one end side in the predetermined axial direction, and the other end side in the predetermined axial direction. It is connected to the lid side engaging part,
The outer peripheral curved surface of the connecting portion intersects with the side wall portion of the case lid member, and the corner portion on the one end side is recessed in an arc shape to smoothly connect the outer peripheral curved surface and the side wall portion. A mechanism to prevent unauthorized opening of circuit board cases.   2. The mechanism for preventing unauthorized opening of a substrate case according to claim 1, wherein the connecting portion is formed by mixing or sticking fine pieces of metal foil on the surface.   The lid-side engaging portion is configured such that the shaft portion of the lock member is inserted into the body-side opening and the lid-side opening, and the lock pin and the pin engagement hole are engaged with each other. The unauthorized opening prevention mechanism for a substrate case according to claim 1 or 2, further comprising a lid-side rib that extends in an arc shape along the outer periphery of the operation portion and surrounds the periphery of the operation portion.   The main body side engaging portion includes the main body side engaging portion and the main body side engaging portion in a state where the main body side engaging portion and the lid side engaging portion are opposed to each other in a state where the case main body member is mounted on the case lid member. The unauthorized opening prevention mechanism for a substrate case according to any one of claims 1 to 3, further comprising a main body side rib that covers a periphery of a surface facing the lid side engaging portion. The main body side engaging portion is configured such that the case main body member is mounted with the case lid member so that the main body side engaging portion and the lid side engaging portion are closely opposed to each other, and the shaft portion of the lock member is In a state where the lock pin and the pin engagement hole are inserted into the main body side opening and the lid side opening, the height is substantially the same as the operation portion of the lock member outside the lid side engagement portion. 5. The unauthorized opening prevention mechanism for a substrate case according to claim 1, further comprising a thin plate-like standing wall standing upright.

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