JP2008245792A - Board case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a board case allowing a worker to easily find abnormality of a fracture structure part for opening a case by a visual inspection. <P>SOLUTION: A circuit board 40 is stored in a board storage chamber formed of a case body member 51 and a lid member 52, the case body member 51 and the lid member 52 are connected by a connecting member 90 for connecting a body side housing 61 and a lid side housing 62 in a closed state of the lid member 52, and this board case 50 is openably constituted by cutting a fracture structure part 70 for the opening provided in the lid member 52. In this board case 50, the fracture structure part 70 has housing supporting pieces 71 and 72 formed by connecting the side wall of the lid member 52 to the lid-side housing 62, and the housing supporting pieces 71 and 72 are formed inclined to the front/rear direction of the case so as to make visible the board surfaces of the housing support pieces when viewed from the front of the board case 50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connecting member that accommodates a circuit board in a substrate housing chamber formed by a case body member and a lid member, and connects a body side housing provided in the case body member and a lid side housing provided in the lid member. The case main body member and the lid member are coupled in a closed state, and the substrate housing chamber can be opened by cutting the opening breaking structure provided on the lid member and separating the lid-side housing from the lid member. Related to the printed circuit board case.

  The board case having the case lock structure as described above is a circuit board (for example, a main control board or a payout control board) that is likely to be subjected to a remodeling action for an illegal gain in a gaming machine such as a pachinko machine or a slot machine. Etc.) is widely used as a means of preventing unauthorized modification.

  These case lock mechanisms are formed of a transparent resin material to form a substrate case for accommodating a circuit board, and project from the side walls of the case main body member and the lid member to form a main body side housing and a lid side housing. When the connecting member, also called a lock piece, is accommodated in a predetermined posture and the lid member is closed, the case main body member and the lid member are coupled in the closed state. When the case main body member and the lid member are coupled in a closed state in this way, generally, the substrate is required unless the opening-side breaking structure provided on the lid member is cut to separate the lid-side housing from the lid member. The containment chamber is configured so that it cannot be opened. The fracture structure is formed by joining the side wall of the lid member and the lid-side housing with a thin-walled strip-like housing support piece, and is configured to cut the housing support piece with a tool such as a nipper. Yes. Such a case lock mechanism prevents unauthorized modification or replacement of the circuit board, and in the unlikely event that unauthorized modification is performed, the administrator or inspector of the game facility can By checking the state of the circuit board and the case lock mechanism visually, the presence or absence of fraud can be inspected (see, for example, Patent Document 1 and Patent Document 2).

JP 2003-340094 A JP 2006-20728 A

  However, in the conventional case lock mechanism, the housing support piece is formed in the front-rear direction (generally the front-rear direction perpendicular to the front surface of the lid member) in a plane orthogonal to the direction in which the housing support piece extends, When viewed from the front of the substrate case, the side end surface of the housing support piece is visible. For this reason, when the housing support piece is cut with a nipper, the deformation and whitening of the cutting portion can be found relatively easily, but it was cut with a hot knife or the like provided with a cutter knife blade at the tip of the soldering iron. In some cases, it has become difficult to detect, and when it is re-adhered with an adhesive, it is extremely difficult to detect this.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a substrate case that can easily find an abnormality of a fractured structure portion by visual inspection.

  In order to solve the above problems and achieve the object, the present invention provides a circuit board (e.g., a circuit board (e.g., a circuit board) formed in a closed state in which a lid member is closed by a case body member and a lid member that covers and closes the case body member. In the embodiment, the main control board 40) is accommodated, and in the closed state of the lid member, the case main body member is connected to the main body side housing provided on the case main body member and the lid side housing provided on the lid member. And the lid member are coupled in a closed state, and the substrate housing chamber is configured such that the substrate housing chamber can be opened by cutting the opening breaking structure provided in the lid member and separating the lid-side housing from the lid member (For example, in the main substrate case 50 in the embodiment), the fracture structure portion is a thin wall formed by connecting the side wall of the lid member forming the substrate housing chamber and the lid side housing. It has a plate-shaped housing support piece, and this housing support piece is formed to be inclined with respect to the front-rear direction in a plane orthogonal to the direction in which the housing support piece extends, and the fracture structure portion is visually observed from the front of the substrate case. When this is done, the plate surface of the housing support piece (for example, the plate surfaces 71b and 72b in the embodiment) is configured to be visible.

  In addition, it is preferable that the rupture structure portion includes a plurality of housing support pieces, and each plate surface of the plurality of housing support pieces is visually recognized when the rupture structure portion is viewed from the front of the substrate case. .

In this case, the plurality of housing support pieces are formed at different angles with respect to the front-rear direction in the plane orthogonal to the extending direction of the housing support pieces (for example, the angles θ ₁ and θ ₂ in the embodiment). It is preferred that

  In addition, the plurality of housing support pieces include a first housing support piece and a second housing support piece that open rearwardly in a U-shape in a plane orthogonal to a direction in which the plurality of housing support pieces extend, and It is also preferable that the front end portion of the housing support piece and the front end portion of the second housing support piece are connected to each other to include a thin plate-like protective piece.

  Moreover, it is preferable that the said housing support piece is formed in circular arc shape in the cross section in the surface orthogonal to the direction where the said housing support piece extends.

  In the substrate case according to the present invention, the thin plate-like housing support piece that connects the side wall of the lid member and the lid-side housing to the fracture structure portion is inclined with respect to the front-rear direction in a plane orthogonal to the direction in which the housing support piece extends. When the fractured structure is viewed from the front of the substrate case, the plate surface of the housing support piece is visually recognized. That is, in the board case of this configuration, when the fractured structure portion is viewed from the front, the plate surface of the housing support piece, which is conventionally positioned behind the side end surface and has been difficult to see, can be clearly seen. The surface is visually recognized in an inclined posture. For this reason, the cutting traces that could only be seen about the thickness of the housing support piece in the past are now visible at a length corresponding to the plate width and the inclination angle of the housing support piece, and are cut by a hot knife or the like. Even in this case, the fraud can be easily detected. In addition, because the plate surface is tilted back and forth, it becomes possible to grasp the re-bonded part after cutting due to reflection of light on the plate surface and difference in refractive index, etc. Can be found.

  According to the configuration in which a plurality of the housing support pieces are provided and the plate surfaces of the plurality of housing support pieces are visually recognized from the front of the substrate case, it is possible to more easily find the cut traces of the housing support pieces. .

  In addition, according to the configuration in which the inclination angle in the front-rear direction of the plurality of housing support pieces is formed at different angles, reflection of light on each plate surface of the plurality of housing support pieces, a difference in refractive index, etc. It can be clearly found from the difference between a plurality of support pieces having different inclination angles, and re-adhesion after cutting can be more easily grasped.

  The plurality of housing support pieces have first and second housing support pieces that open in a C shape toward the rear, and connect the front end portion of the first housing support piece and the front end portion of the second housing support piece. According to the configuration provided with the thin plate-like protective piece, the entire plate surface of the protective piece is visually recognized from the front of the substrate case, and the plate surfaces of the first and second housing support pieces and the protective piece are arranged at at least three different angles. Since it is provided, it is possible to find a cutting trace and an adhesion trace more easily.

  Moreover, it is preferable that cross-sectional shape in the surface orthogonal to the direction where a housing support piece is extended is formed in circular arc shape in said 1 or several housing support piece. This is because when the housing support piece is a flat plate, the cutting blade of the tool used for cutting comes into contact with the plate surface of the housing support piece in a straight line. Whereas (fake disguise) is easy, when the housing support piece is formed in an arc shape in cross section, the cutting tool becomes point contact, and it becomes difficult to cut it into a clean straight line. In addition, since the inclination angle of the plate surface of the housing support piece is an arc shape that changes continuously, the inclination angle changes continuously, such as the reflection of light on the plate surface of the housing support piece and the difference in refractive index. It is possible to find out more clearly from the difference due to the position of the plate surface to be performed, and it is possible to more easily grasp the re-adhesion after cutting.

  Therefore, according to the present invention, it is possible to provide a substrate case in which an abnormality of the fractured structure portion can be easily found by visual inspection.

  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 view of a pachinko machine PM are shown in FIGS. 1 and 2, and the overall configuration of the pachinko machine PM will be outlined below with reference to this figure.

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

  On the front side of the front frame 2, a rectangular glass door 5 and a ball tray unit 6 adapted to the front side area are assembled so as to be openable and closable and detachable. A launch handle 8 is provided at the lower right of the ball tray unit 6. Is provided. An upper part of the front frame located behind the glass door 5 is provided with an accommodation frame for detachably accommodating and holding the game board 10, and the game board 10 configured with a predetermined gauge setting can be attached to and detached from the accommodation frame. The game area PA on the front face is faced to the front of the glass door 5.

  The game board 10 uses a decorative board 11 with cells stuck to the surface of a laminated plywood as a substrate, and has a substantially circular game area PA in which a game ball can be rolled by being surrounded by guide rails provided on the front side thereof. It is formed. In the game area PA, a large number of game nails and windmills (not shown), various winning tools 13 such as a fixed winning tool and a movable winning tool, an image display device 15 that displays an animation image according to the game development status, etc. And an out port 16 is provided at the lower end of the game area PA for discharging the game ball that has fallen without winning the prize device 13 to the back of the game board 10.

  A mechanism set board 20 called a back set board is detachably attached to the rear of the front frame 2 located behind the game board 10, and includes a ball storage tank 21, a tank rail 22, and a ball payout. A prize ball payout mechanism such as the device 23 and a ball processing mechanism such as a game ball discharge passage for guiding game balls such as safe balls and out balls discharged from the game board 10 to a collection device of the game facility are provided. Various circuit boards such as a power supply board 31, a launch control board 32, a payout control board 33, a terminal board 34, an effect control board 35, and a main control board 40 are accommodated in a board case on the rear surface side of the back set board 20. The pachinko machine PM is configured to be operable by screw fixing in a state where each circuit board and the controlled object are connected by a connector cable.

  In the pachinko machine PM configured as described above, the present invention is applied to the main board case 50 that houses the main control board 40. Hereinafter, the configuration of the main board case 50 will be described. FIG. 3 is an exploded perspective view of the main board case 50, and FIGS. 4A and 4B are perspective views of the main board case 50 in an opened state and a closed state. In the following description, for convenience of explanation, the direction of arrow U in the drawing will be referred to as upward and the direction of arrow R as right will be described with reference to the arrangement posture shown in FIG.

  The main board case 50 is mainly configured by a rectangular box-shaped case main body member 51 that opens upward and a rectangular box-shaped lid member 52 that opens downward, and in the closed state in which the lid member 52 is closed to the case main body member 51. The substrate storage chamber 50S can be opened by accommodating and holding the main control substrate 40 in the formed substrate storage chamber 50S (see FIG. 8) and cutting the opening break structure provided in the lid member 52. It is configured as follows.

  The main control board 40 is a control board that comprehensively controls the operation of the pachinko machine PM. The base control board 40 is based on a board 41 that is a multilayer printed wiring board, and has a CPU 42 at the center and a plurality of input / output terminals at the left and right ends. A left connector 43 and a right connector 44 are provided, and a number of electronic components such as a memory, an IC chip, a resistor, and a capacitor are mounted, although other detailed illustrations are omitted. Substrate mounting holes 41a are formed at the four corners of the substrate 41. As shown in FIG. 7 and FIG. 8 which are sectional views taken along arrows VII and VIII in FIG. The screw boss 53 is positioned and supported, and is screwed to the lid member 52 together with an internal cover 46 that protects the solder surface (lower surface) of the substrate 41.

  The case main body member 51 includes a bottom wall 51t formed in a rectangular size somewhat larger than the substrate 41 according to the outer dimensions of the main control board 40, and a side wall 51s that is connected to the bottom wall 51t and surrounds the periphery. Formed in a generally rectangular box shape with an open top surface, a plurality of main body side housings 61 (four in the illustrated embodiment) of the case lock mechanism 60 are provided on the right side wall so as to protrude from the side wall 52s. Yes. A rib 54 is formed in the bottom of the case body member 51 so as to protrude upward from the bottom wall 51t in the form of a vertical and horizontal cross beam, improving the strength of the case body member 51 and closing the lid member 52. In this state, the lower surface of the inner cover 46 accommodated in the substrate accommodating chamber 50S is abutted and supported.

  The lid member 52 includes a side wall 52s formed in a rectangular frame size substantially the same size as the side wall 51s of the case body member 51, and the main control board 40 that is connected to the side wall 52s and on which various electronic components as described above are mounted. A substantially rectangular bottom-open box shape formed by a ceiling wall 52t formed according to a height dimension or the like is formed, and the right side wall has a position aligned with the body-side housing 61 of the case body member 51. A plurality of lid-side housings 62 of the case lock mechanism 60 are provided so as to protrude from the side wall 52s (similarly, four locations in the present embodiment). On the left and right sides of the lid member 52, a ceiling wall 52t is formed low in accordance with the arrangement height of the left and right connectors 43, 44 of the main control board 40. A connector opening 55 through which the connectors 43 and 44 are inserted is formed, the left connector 43 and the right connector 44 of the main control board 40 are exposed to the outside, and the input / output connector cables are connected to the main board. Connection is possible when the case 50 is closed.

  A hinge structure 57 is formed on the left side edges of the case body member 51 and the lid member 52 from a hinge shaft 57a provided on the side wall of the case body member 51 and a hinge arm 57b provided on the side wall of the lid member 52. A case lock mechanism 60 is provided at the right edge of the case body member 51 and the lid member 52 so that the case cannot be opened unless the breaking structure 70 for opening is broken. The case main body member 51 and the lid member 52 are connected to each other by a hinge structure 57 so as to be openable and closable and detachable, and are held in a closed state by a case lock mechanism 60.

  The case main body member 51, the lid member 52, and the inner cover 46 are made of a transparent resin material such as ABS resin or polycarbonate (PC) in order to ensure the visibility of the main control board 40 accommodated in the substrate accommodation chamber 50S. The synthetic resin material is integrally formed by molding means such as injection molding.

  The case lock mechanism 60 is an unauthorized opening prevention mechanism using a connection member 90 also called a connection piece or a lock piece, and its detailed configuration is shown in FIGS. 5A is an exploded perspective view of (a) the main body side housing 61 and (b) the lid side housing 62, and FIG. 6A is a state in which the connecting member 90 in the unlocked position is pulled out from the main body side housing 61. b) A perspective view showing a state in which the extracted connecting member 90 is turned upside down and inserted into the main body housing 61, and FIG. 7 is a sectional view of the case lock mechanism 60 for explaining the operation of the connecting member 90 in the unlocked state. (Cross sectional view taken along arrow VII in FIG. 4) FIG. 8 is a sectional view (cross sectional view taken along arrow VIII in FIG. 4) of the case locking mechanism 60 for explaining the action of the connecting member 90 in the locked state. is there.

  The case lock mechanism 60 is mainly configured by a main body side housing 61 provided on the case main body member 51, a lid side housing 62 provided on the lid member 52, and a connecting member 90 fitted between them. When the lid member 52 is closed with the connecting member 90 in the locked posture, the main body side housing 61 and the lid side housing 62 are connected in a closed state by the connecting member 90, and in principle, provided on the lid member 52. The substrate housing chamber 50 </ b> S cannot be opened unless the breaking structure 70 for opening is broken and the lid-side housing 62 is separated from the lid member 52.

  The four body-side housings 61 provided on the case body member 51 and the four lid-side housings 62 provided on the lid member 52 each have a long side and a short side slightly larger than the connecting member 90. The main body side housing 61 is formed into a bottomed rectangular tube shape having an insertion / extraction opening 61a at the upper end, and the lid side housing 62 is formed into a bottomed rectangular tube shape having an insertion / extraction opening 62a at the lower end. The body-side housing 61 is integrally molded so as to protrude from the side wall 51 s to the right end side of the case body member 51, and the lid-side housing 62 is formed of two strips that protrude from the side wall 52 s to the right end side of the lid member 52. It is joined to the side wall 52s of the lid member via a fracture structure portion 70 made of a housing support piece. The fracture structure 70 will be described in detail later.

  On the other hand, the connecting member 90 has a rectangular tube shape with a long side and a short side in a plan view and extends vertically and has a bottomed rectangular tube shape having an opening 90a at one end and a bottom wall 90b at the other end. It is integrally molded using the same resin material as the member 51 and the lid member 52.

  A wall surface (referred to as a short wall surface for convenience) 92 that forms a short side of a rectangular cross section in the connecting member 90 is located on the opening 90a side, and the root portion is cut into a U shape that connects to the short wall surface 92 on the opening side. Thus, the bottom wall end is configured to be elastically deformable inward and outward in the rectangular tube, and a first lock claw 94 having a wedge shape in cross section protruding outward toward the tip is formed. In addition, a wall surface 93 (also referred to as a long wall surface) 93 that forms the long side of the rectangular cross section is cut into a U-shape that is located on the bottom wall 90b side and that has a root portion connected to the long wall surface 93 on the bottom wall side. A second locking claw 97 having a wedge shape in cross section is formed so that the distal end portion on the opening side can be elastically deformed inwardly and outwardly of the square tube and projects outwardly toward the distal end portion. On the outer surface side of the bottom wall 90b, in order to easily identify whether the connecting member 90 is in the locked posture with the bottom wall 90b facing upward or the unlocking posture with the opening 90a facing upward, The word “lock” is formed (see FIG. 6B).

  The main body side housing 61 that receives the connecting member 90 is fixed by a fixing means such as welding or adhesion, as shown in FIG. 5 (a). As shown in FIG. 5B, a rectangular tube-like lid-side engagement assisting member 66 communicating vertically is fixed to the lid-side housing 62 by the same fixing means.

  Among these, the main body side engagement assisting member 63 fixed to the main body side housing 61 receives and engages with the first lock claw 94 of the connecting member 90 on the inner wall surface of the opposing short side to engage the connecting member 90. A square-hole-like main body side claw locking hole 64 for locking is provided, and a concave groove-shaped main body side guide groove that guides the second lock claw 97 of the connecting member 90 in the vertical direction on the inner wall surfaces of the opposing long sides. 65 is provided.

  The lid-side engagement assisting member 66 fixed to the lid-side housing 62 is also formed with similar guide grooves and claw locking holes on opposite sides, but FIGS. 5 (a) and 5 (b). As is clear from the comparison, the arrangement positions of the long side and the short side are reversed. That is, in the lid-side engagement holding member 66, a square-hole-like lid-side claw locking hole 67 that receives and engages the second lock claw 97 and locks the connecting member 90 on the inner walls of the opposing long sides. A concave groove-like lid-side guide groove 68 for guiding the first lock claw 94 in the vertical direction is provided on the inner wall surface of the opposing short side.

  Therefore, as shown in FIGS. 6A and 7, when the connecting member 90 is mounted on the main body side housing 61 in the unlocking posture with the opening 90a facing upward, the second lock claw formed on the long wall surface 93 is formed. 97 is guided by the main body side guide groove 65, the bottom wall side portion of the connecting member 90 is accommodated in the main body side housing 61, and the first lock claw 94 formed on the short wall surface 92 when the lid member 52 is closed from above. Is guided by the lid side guide groove 68, and the opening side portion of the connecting member 90 is accommodated in the lid side housing 62. In this state, the first lock claw 94 and the second lock claw 97 of the connecting member 90 are both positioned in the recessed groove-shaped guide grooves 68 and 65 extending vertically, and can be relatively moved up and down. The case 50 can be freely opened and closed.

  On the other hand, as shown in FIGS. 6 (b) and 8, when the connecting member 90 is attached to the main body side housing 61 with the bottom wall 90 b facing upward, the first locking claw 94 formed on the short wall surface 92 is The main body side claw locking hole 64 is fitted and engaged, and the opening side portion of the connecting member 90 is fixed in a state of being accommodated in the main body side housing 61. When the lid member 52 is closed from above, the second lock claw 97 formed on the long wall surface 93 is fitted into and engaged with the lid side claw locking hole 67, and the bottom wall side portion of the connecting member 90 is the lid side. It is fixed in a state of being accommodated in the housing 62. In this state, both the first lock claw 94 and the second lock claw 97 of the connecting member 90 are engaged with each other in a state of being expanded in the square hole-shaped claw locking holes 64 and 67. The case body member 51 and the lid member 52 of the substrate case 50 are locked in a closed state in which the case body member 51 and the lid member 52 are coupled via the connecting member 90.

  Therefore, in the case lock mechanism 60, one of the plurality of case lock mechanisms is set in a locked state at the time of factory shipment. For example, when the four case lock mechanisms are the first case lock mechanism 60a to the fourth case lock mechanism 60d, only the connecting member of the first case lock mechanism 60a is set to the lock posture, and the other case lock mechanisms 60b and 60c. , 60c with the connecting member in the unlocked position, the main board case 50 is closed. At this time, the connecting member of the first case lock mechanism 60a is locked inside the main body side and the lid side housings 61 and 62 with the bottom wall 90b facing upward. The administrator of the game facility can see through the ceiling surface of the lid-side housing 62 and visually confirm the characters “lock” formed on the bottom wall, whereby the first case lock mechanism 60a is in the locked state. I can confirm that.

  When it is necessary to open the main substrate case 50, the fracture structure portion 70 of the first case lock mechanism 60a located above is cut with a tool such as a nipper. Then, the lid side housing 62 of the first case locking mechanism 60a is connected to the case body member 51 via the connecting member 90 in the locked posture, but the lid side housing 62 itself is separated from the lid member 52. The connection between the case main body member 51 and the lid member 52 is released, and the main board case 50 can be opened. Therefore, the main board case 50 can be opened to perform maintenance and inspection work for the main control board 40 and the like.

  When the main board case 50 is resealed after performing maintenance and inspection work of the main control board 40, etc., as shown in FIG. 6A, for example, a case lock mechanism other than the first case lock mechanism 60a. The connecting member 90 accommodated in the unlocked posture in the second case lock mechanism 60b is pulled out, and as shown in FIG. 6 (b), it is turned upside down and attached to the main body side housing 61, and the lid member 52 is viewed from above. Close. Then, the first lock claw 94 and the second lock claw 97 of the connecting member 90 are engaged with the main body side claw locking hole 64 and the lid member side claw locking hole 67, respectively, and the case main body member 51 and the lid member 52 are connected. The main board case 50 is locked in the closed state by the second case lock mechanism 60b.

  At this time, from the upper side of the lid-side housing 62, the characters “lock” and the fracture structure portion 70 of the first case lock mechanism 60a are cut at two locations of the first case lock mechanism 60a and the second case lock mechanism 60b. As a result, the manager has a history that the main board case 50 has been opened once, and now the main board case 50 is locked in the closed state by the second case lock mechanism 60b. Can be confirmed.

  In the case lock mechanism 60 having such a function, the fracture structure 70 (70A, 70B, 70C) has a thin strip-shaped housing support piece that connects the side wall 52s of the lid member and the lid-side housing 62. The housing support piece is formed to be inclined with respect to the front-rear direction in a plane orthogonal to the direction in which the housing support piece extends.

First, about the fracture | rupture structure part 70A of 1st Embodiment, it fractured | ruptured as shown in FIG. 9 in sectional drawing (sectional drawing of a surface orthogonal to the direction where a housing support piece extends) seen in the IX arrow direction in FIG. The structural portion 70A connects the side wall 52s of the lid member and the lid side housing 62, and supports, for example, two thin strip plate-like housings having a plate thickness t = 1 to 2 mm and a plate width W = 4 to 6 mm. The first housing support piece 71 and the second housing support piece 72 are formed, and these housing support pieces 71 and 72 are formed in an angle posture inclined at an angle θ _{1 with} respect to the front-rear direction. ing. For this reason, when the fractured structure portion 70A is viewed from the front of the main board case 50 (above the arrow U in FIG. 9), not only the side end surfaces 71a and 72a of the two housing support pieces 71 and 72, , plate surfaces 71b, 72b are visible in length corresponding to the inclination angle θ ₁ (Wsinθ the width of the plate surface when the W _1).

As a result, in the conventional case lock mechanism in which the housing support piece is formed in the front-rear direction without being inclined, the cutting trace that can be seen only about the plate thickness t of the housing support piece when viewed from the front of the case is It can be visually recognized by a length corresponding to the plate width W and the inclination angle θ ₁ of the piece, and the length of the visually recognized cutting trace can be increased by (W sin θ ₁ / t) times. In addition, since the plate surfaces 71b and 72b of the housing support piece are inclined, the re-bonded portion after cutting can be grasped due to the reflection of light on each plate surface, the difference in refractive index, and the like. Can be detected at an early stage.

FIG. 10 is a cross-sectional view of the fracture structure portion 70B of the second embodiment viewed in the same direction as FIG. The fracture structure portion 70B of this embodiment is the same as the fracture structure portion 70A of the first embodiment, but is a first housing support piece in the form of two thin strips connecting the side wall 52s of the lid member and the lid-side housing 62. 73 and the second housing support piece 74, both of which are inclined with respect to the front-rear direction, but the inclination angles are set to different angles. In the illustrated embodiment, In addition, it is configured in a square shape that opens backward as an angle ± θ _{2 in the} opposite direction to the forward direction.

According to such a configuration, similarly to the fracture structure portion 70A of the first embodiment, when the fracture structure portion 70A is viewed from the front of the main board case 50, each side end surface of the first and second housing support pieces. The plate surfaces 73b and 74b can be visually recognized not only at 73a and 74a but also at a length corresponding to the inclination angle ± θ _2. Can be expanded to a length corresponding to the plate width and the inclination angle θ ₂ . Moreover, in the fracture | rupture structure part 70B of this embodiment, since the two housing support pieces 73 and 74 are set to different inclination | tilt angles, the reflection of light in each board surface 73b and 74b, the difference in refractive index, etc. Further, it can be found more clearly from the difference in inclination angle, and re-adhesion after cutting can be grasped more easily. In addition, although the absolute value (θ ₂ ) of the angle is the same as an example of a configuration having different tilt angles in the embodiment, a configuration example in which the tilt direction is the reverse direction (± θ ₂ ) is shown. The directions may be the same and different angles (for example, θ ₁ : θ ₂ ), or the opposite directions may be different (for example, θ ₁ : −θ ₂ ).

FIG. 11 is a cross-sectional view of the fracture structure portion 70 </ b> C of the third embodiment viewed in the same direction as FIGS. 9 and 10. In the same way as the fracture structure portion 70B of the second embodiment, the fracture structure portion 70C of this embodiment connects the side wall 52s of the lid member and the lid-side housing 62 and opens the first housing in the shape of a C in the rear. A thin plate-like protective piece 75 that has a piece 73 and a second housing support piece 74 and connects the front end portion of the first housing support piece 73 and the front end portion of the second housing support piece 74 is provided. At the same time, the lid member 52 is integrally molded. The protective piece 75 is formed thinner than the plate thickness t of the first and second housing support pieces 73 and 74 (for example, thickness t ₂ = about 0.5 to 0.8 mm), and the protective piece 75 is attached at the tip of a nipper or the like. It is configured to pierce and cut the first and second housing support pieces 73 and 74.

  According to such a configuration, since the entire plate surface of the protective piece 75 is disposed on the front side of the main board case 50, it becomes easy to find a cut mark from the situation of the protective piece 75, Since the plate surfaces of the second housing support pieces 73 and 74 and the protection piece 74 are arranged at three different angles, it is possible to easily find a cutting trace and an adhesion trace from the difference in light reflection and refractive index. . Furthermore, since the protective piece 75 is formed thin, the cut portion of the protective piece 75 is generally an irregular fracture surface, and is cut more than the housing support pieces 73 and 74 when cut by a hot knife or the like. Since the burn-through increases, it becomes easy to grasp the abnormality of the fractured structure portion 70C, and the deterrent against fraud can be improved.

  FIG. 12 shows a cross-sectional view of the fracture structure portion 70D of the fourth embodiment as viewed in the same direction as FIGS. In the fracture structure portion 70D of this embodiment, the inclination angles of the plate surfaces 76b and 77b of the first housing support piece 76 and the second housing support piece 77 that connect the side wall 52s of the lid member and the lid-side housing 62 are different from each other. The cross-sectional shapes that change continuously with the angle and are orthogonal to the direction in which the housing support piece extends are each formed in an arc shape.

  Moreover, the fracture | rupture structure part 70E of 5th Embodiment shown in FIG. 13 is a single with which the 1st housing support piece 76 and the 2nd housing support piece 77 in the fracture | rupture structure part 70D of the said 4th Embodiment were connected by the upper end. It has a housing support piece 78 and is formed in a circular arc shape (semi-cylindrical shape) whose sectional shape is convex upward.

  According to such a configuration, when cutting the housing support pieces 76, 77, 78, the blade of the cutting tool is in point contact (for example, when cutting with a nipper, the two corners on the lower surface side of the housing support piece). It is difficult to cut into a clean straight line because point contact is made at three points, one point on the plate surface and one point on the plate surface when cutting with a knife or the like. For this reason, it is possible to generate a cut surface that is difficult to perform camouflage work. Further, since the inclination angles of the plate surfaces 76b, 77b and 78b of the housing support piece are continuously changed, the reflection of light on the plate surface of the housing support piece, the difference in refractive index, etc. Can be found more clearly from the difference due to the position of the continuously changing plate surface, and even if the fraudster performs a clever disguise, it can easily find and grasp the re-adhesion after cutting it can. In addition, instead of the circular arc shape in which the inclination angle changes continuously, it may be formed in a polygonal shape in which the inclination angle changes intermittently.

  In addition, when ABS resin is used as the material of the lid member 52 and the case body member 51, the housing support pieces 71 to 74 and the protective piece 75 of the fractured structure portion 70 (70A, 70B, 70C) are compressed and cut with a nipper or the like. When this is done, it is possible to obtain the effect that the cut portion is easily stretched and whitened due to the rubber elasticity of butadiene which is a component of the ABS resin, and the cut marks are easily left clearly.

  Therefore, according to the substrate case including the fracture structure portion 70 as described above, it is possible to provide a substrate case in which an abnormality of the fracture structure portion can be easily found by visual inspection.

  In the embodiment described above, the example applied to the main board case 50 that houses the main control board 40 has been described, but the present invention is applied to other circuit boards such as the payout control board 33 and the effect control board 35. The same effect can be obtained by applying the same to circuit boards of other types of gaming machines other than pachinko machines, such as arrange ball machines, sparrow ball machines, and slot machines.

It is a front view of the pachinko machine shown as an example of the gaming machine to which the present invention is applied. It is a rear view of the pachinko machine. It is a disassembled perspective view of a main board case. It is a perspective view of (a) open state and (b) closed state of the main board case. It is a disassembled perspective view of (a) main body side housing and (b) lid side housing in the main substrate case. It is a perspective view of a case lock mechanism showing (a) a connecting member in an unlocking posture and (b) a connecting member in a locked posture above the main body side housing. It is sectional drawing (sectional drawing of the VII arrow in FIG. 4) of the case locking mechanism for demonstrating the effect | action of the connection member in an unlocked state. It is sectional drawing (sectional drawing of the VIII arrow in FIG. 4) of the case locking mechanism for demonstrating the effect | action of the connection member in a locked state. It is sectional drawing of the fracture | rupture structure part of 1st Embodiment seen in the IX arrow direction in FIG. It is sectional drawing of the fracture | rupture structure part of 2nd Embodiment seen in the same direction as FIG. It is sectional drawing of the fracture | rupture structure part of 3rd Embodiment seen in the same direction as FIG. It is sectional drawing of the fracture | rupture structure part of 4th Embodiment seen in the same direction as FIG. It is sectional drawing of the fracture | rupture structure part of 5th Embodiment seen in the same direction as FIG.

Explanation of symbols

PM Pachinko machine 40 Main control board (circuit board)
50 Main board case (board case)
50S substrate housing chamber 51 case body member 52 lid member (52s side wall of lid member)
60 (60a to 60d) Case lock mechanism 61 Main body side housing 62 Lid side housing 70 (70A to 70E) Breaking structure portion 71 First housing support piece (71a side end surface, 71b plate surface)
72 2nd housing support piece (72a side end surface, 72b board surface)
73 1st housing support piece (73a side end surface, 73b board surface)
74 Second housing support piece (74a side end surface, 74b plate surface)
75 Protection piece 90 Inclination angle with respect to the front-rear direction in a plane orthogonal to the extending direction of the connecting members θ ₁ and θ ₂ housing support pieces

Claims (5)

A circuit board is housed in a substrate housing chamber formed in a closed state in which the lid member is closed by a case body member and a lid member that covers and closes the front of the case body member, and the circuit board is provided in the case body member in the closed state. The case main body member and the lid member are coupled in the closed state by a connecting member that couples the main body side housing and the lid side housing provided on the lid member, and the breaking structure for opening provided on the lid member. In the substrate case configured to be able to open the substrate housing chamber by cutting the portion and separating the lid-side housing from the lid member,
The fracture structure portion includes a thin strip-shaped housing support piece formed by connecting a side wall of the lid member forming the substrate housing chamber and the lid-side housing,
The housing support piece is formed to be inclined with respect to the front-rear direction in a plane orthogonal to the extending direction of the housing support piece, and the housing is viewed when the fracture structure portion is viewed from the front of the substrate case. A substrate case characterized in that the plate surface of the support piece is visible.   The break structure portion has a plurality of the housing support pieces, and is configured such that each plate surface of the plurality of housing support pieces is visually recognized when the break structure portion is viewed from the front of the substrate case. The substrate case according to claim 1.   The substrate case according to claim 2, wherein the plurality of housing support pieces are formed at different angles with respect to the front-rear direction in a plane orthogonal to a direction in which the plurality of housing support pieces extend. The plurality of housing support pieces include a first housing support piece and a second housing support piece that open rearwardly in a U-shape in a plane orthogonal to a direction in which the plurality of housing support pieces extend,
4. The substrate case according to claim 2, further comprising a thin plate-like protective piece that connects a front end portion of the first housing support piece and a front end portion of the second housing support piece. 5. The substrate case according to claim 1, wherein the housing support piece is formed in an arc shape in a cross section in a plane orthogonal to a direction in which the housing support piece extends. .

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