JP4288192B2 - Mechanism for preventing unauthorized opening of circuit board case - Google Patents

Description

  The present invention relates to a board case that accommodates a control board that controls the operation of a gaming machine in a gaming machine such as a pachinko machine or a slot machine, and more specifically, can illegally open a board case that contains a control board or the like. The present invention relates to a mechanism for preventing unauthorized opening of a substrate case to prevent unauthorized actions against a control board or the like.

  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 gaming machine, a game board and a back mechanism board are mounted on a storage frame on the back side of a front frame that is assembled to be openable and closable with respect to an outer frame, and a control board is attached to the back mechanism board. Similarly, in the slot machine, a control board is attached to the back surface of the opening / closing cover.

  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 accessories, reel rotation control, symbol combination occurrence probability control, etc. A ROM in which the control software of the machine is recorded is mounted and serves as a central control device that controls the operation of the gaming machine. For this reason, the control board is housed in the board case so that it is not subject to unauthorized modification such as replacement with a counterfeit ROM, and this board case is illegally opened (or illegally left with traces when the case is opened). (Detachment) prevention means is provided.

  Examples of such unauthorized opening prevention means include means for fastening a plurality of cleavable screw fastening pairs with special screws. This is a board case composed of a case main body member and a case lid member that can be freely opened and closed on the case main body member, and a screw threaded portion corresponding to each side edge of the case main body member and the case lid member, and A plurality of screw fastening pairs consisting of screw penetration parts are formed, and of these, at least one screw threaded part and screw penetration part can be operated only in the tightening direction. The engagement portion is formed only in the direction, and the engagement portion in the loosening direction is removed in a spiral shape, and is tightened with a screw (hereinafter referred to as “one-way screw” in this specification). In this configuration, a severable cutting part is formed between the case lid member and the screw penetration part. For example, Japanese Patent Laid-Open No. 10-328385 and Japanese Patent Laid-Open No. 11-226220 disclose such a configuration.

  With the above-described unauthorized opening prevention means, when the administrator opens the board case for ROM inspection, control board maintenance inspection, etc., the cutting portion of the fastening pair fastened with the one-way screw is cut with a tool such as a nipper. By disconnecting the screw penetration part from the case lid member, the connection between the case lid member and the case main body member is released, and the case lid member is opened. In this way, the case lid member is opened and the ROM is inspected, etc., but after this inspection is completed, another fastening pair that has not yet been fastened is fastened with a one-way screw, and the case body member is attached to the case body member. Install and close. In addition, a board management sticker that displays the board management number and the opening history is affixed to the board case, and the administrator who opened the label manages the opening date and the name of the person who opened it on this board management sticker. It has become.

According to the unauthorized opening prevention means as described above, the one-way screw generally cannot be rotated in the direction of loosening the screw, and it is necessary to cut the cutting part when opening the board case. Traces remain clear and unauthorized opening can be detected early.
JP-A-10-328385 Japanese Patent Laid-Open No. 11-226220

  However, since the above-described unauthorized opening prevention means uses a one-way screw as the fastening means, a tool such as a screwdriver must be used when fastening the screw fastening pair, and the fastening work is troublesome. It was.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a mechanism for preventing unauthorized opening of a substrate case that can prevent unauthorized actions on a control board with a simpler configuration.

In order to achieve such an object, the board case unauthorized opening prevention mechanism according to the present invention includes a case body member and a case lid member attached to the case body member, and the case lid member is attached to the case body member. A board case (for example, main board case 55 in the embodiment) that accommodates a control board that controls electronic components mounted on a gaming machine has a main body side opening that opens to one end side. inside is connected via the main body side insertion space is formed and the body side engaging portion that is connected via a main connecting portion to case body member together, the cover-side connecting portion to the casing cover member and a cover-side engagement portion formed so as to close the main body insertion space over the main body side opening overlap to face the body-side engaging portion when mounting the case cover member to the case body member, the body body side inserted from the side opening Mounted in engagement with the main assembly side engaging portion by being rotated in one direction by a first predetermined angle around the insertion direction parallel to the rotation axis while being inserted into the space, the first predetermined angle in the opposite direction A main body side connecting member configured to be removed from the main body side engaging portion by being rotated only, and a lid side connecting member that is attached by engaging with the lid side engaging portion. At least one of the main body side connecting portion and the lid side connecting portion can be cut. Furthermore, the cover-side connecting member, the side connecting member is rotated the lid-side engaging portion main body side engagement in the mounted state engages with the body side engaging portion while being inserted into the main body insertion space When the main body side insertion space is closed by overlapping with the joint portion and covering the main body side opening, it is inserted into the main body side insertion space and is connected to the main body side connection member in both the insertion direction and the rotation direction. A connecting member engaging portion configured to be coupled to the connecting member engaging portion and integrally connected to the connecting member engaging portion, and at least a second predetermined angle smaller than the first predetermined angle And a holding part that is engaged and attached to the lid side engaging part so that it cannot be extracted in the insertion / extraction direction .

Then, the body-side connecting member is mounted in engagement with the rotating body side engaging portion while being inserted into the main body insertion space, and the holding portion is attached to engage with the cover-side engaging portion With the lid side connecting member attached to the lid side engaging portion, the lid side engaging portion overlaps the main body side engaging portion and covers the main body side opening to close the main body side insertion space. When the connecting member engaging portion is inserted into the main body side insertion space, the main body side engaging member and the lid side engaging portion are engaged with the main body side connecting member in an integrally coupled state in both the insertion direction and the rotational direction. Are connected, and the holding part is attached to the lid-side engaging part with the rotation of the holding part restricted by a second predetermined angle or more, so that the connecting member engaging part and the second predetermined angle of the main body side connecting member engaged therewith The above rotation is restricted and the main body side connecting member is engaged with and held by the main body side engaging portion. , Connecting the main body-side engaging portion and the lid-side engaging portion is held, is configured to retain a state of mounting the casing cover member to the case body member, the body-side connecting portion and the lid-side connecting portion It is possible to disconnect at least one of the case main body member and the main body side engaging portion or release the case lid member from the case main body member by releasing the connection between the case main body member and the main body side engaging portion; and With the case lid member removed , the lid side engaging portion is rotated relative to the body side engaging portion, and the body side connecting member is rotated in the reverse direction by the first predetermined angle via the lid side connecting member connected thereto. It can be removed from the main body side engaging portion.

In the above-described invention, the lid-side connecting member is inserted into the lid-side insertion portion in the lid-side engagement portion from the insertion port formed on the side opposite to the side facing the main body-side opening, and the lid-side insertion portion In this state, the holding portion engages with the lid side engaging portion by rotating in one direction by a second predetermined angle smaller than the first predetermined angle around a rotation axis parallel to the insertion direction. It is preferable that the holding portion and the lid-side engagement portion are disengaged by being rotated by a second predetermined angle in the direction opposite to the one direction, and can be extracted from the insertion port to the opposite side .

  According to the present invention, by engaging the main body side connecting member engaged with the main body side engaging portion and the lid side connecting member engaged with the lid side engaging portion, the main body side engaging portion and the lid side engagement member are engaged. Since the joint portion is coupled, the main body side engaging portion and the lid side engaging portion can be easily coupled, and the case main body member and the case lid member can be easily coupled and held in the closed state. . In addition, since at least one of the main body side coupling portion and the lid side coupling portion is configured to be cut, the case lid member is removed from the case main body member by cutting the severable main body side coupling portion or the lid side coupling portion. However, when each connecting portion is cut in this way, the destruction trace remains, so that it can be easily found and fraud can be effectively suppressed.

Further, the main body side connecting member is inserted into the main body side insertion space and rotated to engage with the main body side engaging portion, and the holding portion engages with the lid side engaging portion, whereby the lid side connecting member is covered with the lid. It is configured to be attached to the side engaging portion, and the lid side engaging portion is rotated with the case lid member removed from the case main body member by cutting the main body side connecting portion or the lid side connecting portion as described above. Since the main body side connecting member can be rotated and removed from the main body side engaging portion through the lid side connecting member connected thereto, the lid side connecting member and the main body side connecting member can be reused. Therefore, by providing a plurality of main body side engaging portions and lid side engaging portions on the case main body member and the case lid member, after completion of the inspection of the ROM, the set of the main body side engaging portions and the lid whose connection portions are cut The main body side connecting member and the lid side connecting member are detached from the side engaging portion, and the main body side engaging portion and the lid of the set in which the connecting portion is not cut yet using the detached main body side connecting member and lid side connecting member By connecting the side engaging portion, the case main body member and the case lid member can be coupled and held in the closed state again while reusing the main body side connecting member and the lid side connecting member. That is, the case body member and the case lid member can be coupled and held again (multiple times) with only one set of the body side connection member and the lid side connection member.

In the above method, the cover-side connecting member is engaged with the cover-side engaging portion holding portion by rotating in one direction by a first predetermined angle is smaller than the second predetermined angle is inserted into the cover side insertion portion In the case where the holding portion and the lid-side engaging portion are disengaged by being rotated by a second predetermined angle in the opposite direction, and can be extracted from the insertion port to the opposite side. Can easily remove the lid-side connecting member from the lid-side engaging portion.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show a pachinko machine PM as a representative example of a gaming machine provided with a substrate case having an unauthorized opening prevention mechanism according to the present invention. First, the overall configuration of the pachinko machine PM with reference to these drawings A brief explanation will be given. Here, FIG. 1 is a front view of the pachinko machine PM, and FIG. 2 is a rear view of the pachinko machine PM.

  In the pachinko machine PM, an opening front frame 2 configured in a rectangular frame size corresponding to the front frame 2 is formed in front of each other on the front surface of the outer frame 1 which is configured in an outer rectangular frame size and forms a vertically fixed holding frame. The hinge members 3a and 3b disposed on the left and upper sides are attached so as to be able to be opened and closed laterally and attached and detached, and are always in a closed state engaged with the outer frame 1 using the locking device 4 provided on the right side of the front. Retained.

  Hinge mechanisms 7a and 7b each having a square glass door 5 and a ball tray 6 provided on the front left side of the front frame 2 as game development members for developing pachinko games in the front frame 2 , 7c can be opened / closed and attached / detached sideways, and an operation handle 8 for performing a game ball launching operation is provided at the lower right side of the ball tray 6. A rectangular frame-shaped storage frame (not shown) that protrudes rearward from the center to the top of the front frame 2 is formed integrally with the front frame 2, and the game board is configured with a predetermined gauge setting in the storage frame. 10 is detachably set and held, and the game area PA on the front of the game board faces the glass door 5 that is normally held closed.

  On the back side of the front frame 2, there is a plurality of back set boards 30 provided on the back side of the front frame 2, which have a window that communicates with the front and rear in the center and is formed in a rectangular frame shape slightly smaller than the front frame 2. The levers L, L... Are detachably set and held. Each part of the back set board 30 is equipped with a prize ball device such as a ball storage tank 31 for storing game balls, a tank rail 32, an alignment standby passage 33, a prize ball cassette 34, a prize ball discharge passage 35, and the like. Various control board assemblies such as the power board assembly 40 and the main board assembly 50 and electronic components are attached to the power board assembly 40 and the image control board assembly 18 attached to the back surface of each device and the game board 10. Connected with a wire harness.

  An auxiliary mechanism portion called a game assisting board (not shown) is formed in the lower region of the front frame 2 whose front side is covered with the ball tray 6, and a ball hitting device ( A storage cassette (not shown) for temporarily storing game balls that are connected to the prize ball discharge passage 35 on the back set board 30 side and cannot be discharged to the ball tray 6 are provided.

  The pachinko machine PM is used in a game in which the front frame 2, the glass door 5, and the ball tray 6 are all closed and locked, and a game ball is stored in the ball tray 6 and the operation handle 8 is rotated. A game is started. When the operation handle 8 is turned, the game balls stored in the ball tray 6 are shot one by one into the game area PA of the game board 10 by the hitting ball launcher, and the pachinko game is developed thereafter.

  In the pachinko machine PM schematically configured as described above, the main substrate assembly 50 is provided with an unauthorized opening prevention mechanism. The main substrate assembly 50 will be described below with reference to FIGS. 3 is a perspective view of the main board assembly 50, FIG. 4 is a side sectional view of the main board assembly 50, FIG. 5 is an exploded front view of the main board assembly 50, and FIG. 6 is a rear view of the case lid member 70. 7 (a) is an enlarged view showing a state in which the locking arm 64 is locked to the locking projection 74, and FIG. 7 (b) is an enlarged side sectional view showing a state in which the locking arm 64 is locked to the locking projection 74. 8A is an enlarged view showing a state before the locking arm 64 is locked to the locking protrusion 74, and FIG. 8B is a state before the locking arm 64 is locked to the locking protrusion 74. FIG. It is an expanded side section which shows the state of.

  As shown in FIGS. 3 to 5, the main board assembly 50 mainly includes a main control board 51 that comprehensively controls the operation of the pachinko machine PM and a main board case 55 that accommodates the main control board 51 therein. Composed. Further, the main board case 55 includes a case main body member 60 fixed to the back set board 30 of the pachinko machine PM, a case lid member 70 attached to the case main body member 60 so as to be openable and closable, and a back surface side of the main control board 51. The case cover member 70 is configured to be attachable to the case body member 60 in a state where the main control board 51 and the inner cover 80 are attached to the inner surface side of the case cover member 70.

  As shown in FIG. 5, the main control board 51 includes a CPU 52 arranged at the center of the main control board 51, left connection connectors 53, 53,... Arranged on the left side of the main control board 51. It has electronic components such as right connection connectors 54, 54,... Arranged on the right side of the substrate 51. In the four corners of the main control board 51, board attachment holes 51a, 51a,... Are formed so as to be fitted to boss parts 71b of the board attachment part 71 formed in the case lid member 70. Pin holes 51 b, 51 b, 51 b are formed at three positions near the edge of the main control board 51, and are fitted with positioning pins 81, 81, 81 of the inner cover 80.

  The case body member 60 has a rectangular box shape having an opening on the front surface side, and is integrally formed by a molding means such as injection molding using a transparent resin material such as ABS resin or polycarbonate (PC). Reinforcing ribs 61 are formed vertically and horizontally on the bottom of the case main body member 60 to improve the strength of the case main body member 60 and to receive the inner cover 80 accommodated in the case. Yes.

  Hinge shafts 62 and 62 are formed at the left end portion of the case main body member 60 so as to be hingedly engaged with the hinge arms 74 and 74 of the case lid member 70, respectively. Locking arms 63, 63 projecting forward are formed on the outer surfaces of the upper and lower side walls of the case body member 60, and as shown in FIGS. 7 and 8, the locking protrusions 75, 75 of the case lid member 70 are respectively provided. It is designed to be locked.

  An inner guard rib 64 protrudes from the inner side of the edge of the case body member 60, and is positioned inside the outer guard rib 78 of the case lid member 70 when the case lid member 70 is attached to the case body member 60. It is supposed to be. An edge contact portion 65 is formed on the outer side of the edge of the case body member 60 so as to be connected to the inner guard rib 64, and the outer guard rib 78 is edged when the case lid member 70 is attached to the case body member 60. It comes in contact with the part contact part 65.

  The case lid member 70 has a rectangular box shape covering the opening of the case body member 60, and is integrally formed by a molding means such as injection molding using a transparent resin material such as ABS resin or polycarbonate (PC). The As shown in FIGS. 6 and 24, boss-shaped substrate mounting portions 71, 71,... Are formed at the four corners on the back surface (inner surface side) of the case lid member 70 with screw holes 71a, 71a,. The main control board 51 and the inner cover 80 are fixed to the inner surface of the case cover member 70 by being fixed by board mounting screws 89.

  A boss 71b having a thickness equivalent to that of the main control board 51 and having a diameter slightly smaller than the board attachment hole 51a of the main control board 51 is provided at the tip of the board attachment part 71. , The front surface of the main control board 51 protrudes from the board mounting surface 71c (see FIG. 24) that contacts the board mounting hole 51a.

  A left connector opening 72 is formed on the left side of the case lid member 70, and the main control board 51 is mounted with the case lid member 70 mounted on the case body member 60 as shown in FIGS. 3 and 23. The left connection connectors 53, 53,... Are exposed to the outside. .. Are formed on the right side of the case lid member 70. With the case lid member 70 attached to the case body member 60, the right connection connectors 54, 54 of the main control board 51 are formed. 54,... Are exposed to the outside. Note that the peripheral portions (rib portions) of the left and right connector openings 72 and 73 are preferably in contact with the front side of the main control board 51. Thereby, it can prevent that tools, such as a wire and a cell board, are inserted in the case from the left and right connector openings 72 and 73.

  As shown in FIG. 6, hinge arms 74 and 74 are formed at the left end portion of the case lid member 70, and are hingedly engaged with the hinge shafts 62 and 62 of the case main body member 60, respectively. Then, the hinge shafts 62 and 62 of the case main body member 60 and the hinge arms 74 and 74 of the case cover member 70 are hinge-engaged, so that the case cover member 70 is centered on the hinge shaft 62 with respect to the case main body member 60. It is attached so that it can swing open and close.

  On the outer surfaces of the upper and lower side walls of the case lid member 70, locking projections 75 and 75 that can be locked with the locking arms 63 and 63 of the case body member 60 are formed. Then, as shown in FIG. 7A, when the case lid member 70 is overlaid (swinged) on the case main body member 60 to be in the closed state, the locking arms 63 and 63 are locked to the locking protrusions 75 and 75, respectively. The case lid member 70 is mounted and held in a closed state with respect to the case main body member 60.

  A locking auxiliary protrusion 76 is formed in front of the locking protrusion 75 (upper in FIGS. 7 and 8), and the locking arm 63 is locked to the locking protrusion 75 as shown in FIG. In this state, the locking auxiliary protrusion 76 is adjacent to the tip of the locking arm 63 (on the side opposite to the locking protrusion 75). Accordingly, it becomes difficult to hook a finger or a tool on the tip of the locking arm 63, so that the locking state of the locking arm 63 with respect to the locking projection 75 can be prevented from being easily released.

  Finger hooks 77 and 77 are formed on the right side (the left side in FIG. 6) of the locking projection 75, and the operator can perform this operation while the locking arm 63 is not locked to the locking projection 75. The case lid member 70 can be easily opened and closed with respect to the case main body member 60 by hooking the finger rests 77 and 77 with fingers.

  Outer guard ribs 78 project from the outer edge of the case lid member 70, and when the case lid member 70 is attached to the case body member 60 as shown in FIG. The member 60 is positioned outside the inner guard rib 64 and is in contact with the edge contact portion 65 of the case main body member 60.

  As a result, a slight gap is generated between the edge of the case lid member 70 (outer guard rib 78) and the edge of the case body member 60 (edge contact portion 65). Even if a tool such as a tool (not shown) is to be inserted into the case, a slight labyrinth-shaped tool formed between the outer guard rib 78 of the case lid member 70 and the inner guard rib 64 of the case body member 60 is used. Since it must pass through the gap, it is possible to prevent tools such as wires and cell plates from being illegally inserted into the case.

  A substrate abutting portion 79 is formed inside the edge portion of the case lid member 70. When the main control substrate 51 is attached to the inner surface side of the case lid member 70 as shown in FIG. The surface of the main control board 51 that is in contact with the edge of the board 51 and faces the case lid member 70 (that is, the front side of the main control board 51) is covered with the case lid member 70.

  As a result, the substrate abutting portion 79 abuts against the edge of the main control substrate 51, and the main control substrate 51 is placed in the case in a state where the surface of the main control substrate 51 facing the case lid member 70 is covered by the case lid member 70. Since it is attached to the inner surface side of the lid member 70, even if tools such as a wire or a cell plate are inserted into the case from the gap between the case main body member 60 and the case lid member 70, these tools remain in the main control board 51. Since the surface facing the case lid member 70 cannot be reached, illegal acts on the main control board 51 can be prevented more reliably.

  The inner cover 80 has a rectangular plate shape matching the shape of the main control board 51, and is integrally formed using a transparent resin material such as ABS resin or polycarbonate (PC). Positioning pins 81, 81, 81 are formed at three positions near the edge of the inner cover 80, and are fitted into the pin holes 51 b, 51 b, 51 b of the main control board 51, respectively. It just overlaps the back side of the substrate 51. Further, the positioning pin 81 is fitted into a lid-side pin hole 85 (see FIG. 6) formed in the case lid member 70 in a state of being fitted to the pin hole 51b of the main control board 51. .

  .. Are formed at the four corners of the inner cover 80 with screw passage holes 82a, 82a,... 71,... Are fixed with screws. Then, with the main control board 51 oriented in a predetermined direction, the board mounting hole 51a of the main control board 51 is fitted to the boss 71b of the board mounting section 71, and the positioning pins 81 of the inner cover 80 are further controlled. The board mounting screws 89 are fitted in the pin holes 51 b of the board 51 and fitted into the lid side pin holes 85 of the case lid member 70 and the inner cover 80 is placed on the back side of the main control board 51. Is passed through the screw passage hole 82a of the inner cover 80 and fixed to the screw hole 71a of the board attachment portion 71, whereby the main control board 51 and the inner cover 80 are attached to the inner surface side of the case lid member 70.

  A peripheral rib 83 is formed on the edge of the inner cover 80 so as to be in contact with the edge of the main control board 51. With the peripheral rib 83 in contact with the edge of the main control board 51, the inner cover 80 is configured to cover the surface of the main control board 51 that faces the case main body member 60 (that is, the back side of the main control board 51).

  As a result, the peripheral rib 83 of the inner cover 80 comes into contact with the edge of the main control board 51, and the surface of the main control board 51 facing the case main body member 60 is covered with the inner cover 80. Even if a tool such as a wire or a cell plate is inserted into the case through the gap between the case 60 and the case lid member 70, these tools are not included in the main body of the main control board 51 (in addition to the surface facing the case lid member 70). Since the surface facing the member 60 cannot be reached, illegal acts on the main control board 51 can be prevented more reliably.

  Thus, when the case lid member 70 is closed with respect to the case body member 60, the locking arm 64 is only locked to the locking projection 74, and the case lid member 70 is moved to the case body. The member 60 can be easily rocked and released. Therefore, in order to prevent the case lid member 70 in the closed state from being opened and to prevent unauthorized operation, the substrate assembly 50 is provided with an unauthorized opening prevention mechanism. Therefore, the unauthorized opening prevention mechanism 100 provided in the substrate assembly 50 will be described in detail below with additional reference to FIGS.

  9 is an exploded perspective view of the unauthorized opening prevention mechanism 100, FIG. 10 is a perspective view showing a state where the main body side connecting member 130 is engaged with the main body side engaging portion 110, and FIG. FIG. 12 is a plan sectional view taken along the arrow XII-XII in FIG. 11, and FIG. 13 shows the lid-side connecting member 140 and the lid-side engaging portion 120. FIG. 14 is a plan view of the main body side engaging portion 110, FIG. 15 is a bottom view of the main body side engaging portion 110, and FIG. 16 is an explanatory view showing the engaging process in time series in the order of (a) to (c). FIG. 17 is a perspective view of the lid side engaging portion 120 as viewed from one end side, and FIG.

  18 is a perspective view of the main body side connecting member 130 viewed from the bottom surface side, FIG. 19 is a plan view of the main body side connecting member 130, FIG. 20 is a front view of the main body side connecting member 130, and FIG. FIG. 22 is a side view of the lid-side connecting member 140, FIG. 23 is a side sectional view of the main board assembly 50 in a closed state, and FIG. 24 is an enlarged side view (partial sectional view) of the main board assembly 50 in an open state. 25 is a perspective view of the unauthorized opening prevention mechanism 100, and FIG. 26 is a cross-sectional view taken along arrows XXVI-XXVI in FIG.

  As shown in FIG. 9, the unauthorized opening prevention mechanism 100 includes four main body side engaging portions 110, 110,... (See also FIG. 5) that are connected to the case main body member 60, and the case lid member 70. .. (See also FIG. 5), a main body side connecting member 130 that is detachably engaged with the main body side engaging portion 110, and a lid side engaging member. A lid-side connecting member 140 that is detachably engaged with the joint portion 120, and the body-side connecting member 130 and the lid-side connecting member 140 are engaged when the case lid member 70 is closed with respect to the case body member 60. By combining, the main body side engaging portion 110 and the lid side engaging portion 120 are configured to be connectable.

  As shown in FIGS. 5 and 9, the main body side engaging portion 110 has a bottomed cylindrical shape having a main body side opening 111 at one end (upper side in FIG. 9) at the right end of the case main body member 60. And formed integrally. A main body side connecting portion 119 that connects the case main body member 60 and the main body side engaging portion 110 is formed across the case main body member 60 and the main body side engaging portion 110. A main body side insertion portion 112 is formed inside the main body side engaging portion 110, and the main body side connection member 130 is inserted as shown in FIGS.

  As shown in FIG. 14, main body side engaging pieces 113, 113 are formed so as to protrude from the two inner portions of the main body side engaging portion 110, respectively. Each is configured to be engageable. Note that the two main body side engaging pieces 113 and 113 are arranged on the inner side of the main body side engaging portion 110 at an interval of 180 degrees (facing each other). As shown in FIG. 15, an engagement hole 114 is formed at the bottom of the main body side engagement piece 113 according to the shape of the protrusion 134 of the main body side connection member 130.

  As shown in FIGS. 6 and 16, the lid-side engaging portion 120 is formed in a cylindrical shape having a lid-side opening 121 at one end (front side in FIG. 16) at the right end of the case lid member 70. It is formed so as to be opposed to and overlap with the main body side engaging portion 110 when the case lid member 70 is attached to the case main body member 60. As shown in FIG. 6, a lid-side connecting portion 129 that connects the case lid member 70 and the lid-side engaging portion 120 is formed across the case lid member 70 and the lid-side engaging portion 120. . Further, the lid side connecting portion 129 is configured to be cuttable, and the lid side engaging portion 120 and the case lid member 70 can be separated by cutting the lid side connecting portion 129. .

  As described above, a transparent resin material is used as the material of the main substrate case 55 (the case main body member 60 and the case lid member 70). Among them, it is preferable to use an ABS resin. Thereby, when the cutting operation is performed on the member as described above, the butadiene, which is a component of the ABS resin, has a rubber property, and the member is easily whitened without being cracked. An effect is obtained. Further, even if the main board case 55 is forcibly opened, there is an effect that the member is similarly whitened and the trace is easily left clearly.

  As shown in FIG. 16, a lid-side fitting part 122 having a slightly smaller diameter than the body part of the lid-side engaging part 120 is formed on one end side of the lid-side engaging part 120, as shown in FIG. Further, when the lid side engaging portion 120 overlaps with the main body side engaging portion 110, the lid side engaging portion 120 enters inside from the main body side opening portion 111 of the main body side engaging portion 110 and is fitted to the main body side engaging portion 110. It is like that. Further, a distal end contact portion 122a is formed so as to be connected to the base end portion of the lid side fitting portion 122, and when the lid side engaging portion 120 is opposed to and overlaps with the main body side engaging portion 110, the main body side engagement is established. The edge part of the one end side of the joint part 110 contacts.

  Thereby, when the case lid member 70 is attached to the case body member 60, the body side opening 111 of the body side engaging portion 110 and the lid side opening 121 of the lid side engaging portion 120 are opposed to each other and connected. Closed. Therefore, in a state where the lid side engaging portion 120 overlaps the main body side engaging portion 110, the lid side fitting portion 122 of the lid side engaging portion 120 is fitted to the main body side engaging portion 110, and the main body side Unauthorized access to the inside of the engaging part 110 and the lid-side engaging part 120 is prevented.

  As shown in FIGS. 9 and 17, an insertion port 123 through which the lid-side connecting member 140 can pass is formed at the other end of the lid-side engaging portion 120. A partition wall 124 is formed in the center of the lid side engaging portion 120 so as to block the inside of the lid side engaging portion 120, and the lid side connecting member 140 is adjacent to the other end side of the partition wall 124. The lid side insertion part 125 into which can be inserted is formed.

  A passage hole 126 is formed in the central portion of the partition wall 124 so that the connection member engagement portion 141 (body portion) of the lid side connection member 140 can pass therethrough. Further, a pair of projection passage portions 126a and 126a are formed symmetrically connected to the peripheral portion of the passage hole 126 so that the engagement projections 142 and 142 of the lid-side connection member 140 can pass therethrough, respectively. Further, a pair of support ribs 127 and 127 are formed on the periphery of the passage hole 126 excluding the protrusion passage portions 126a and 126a so as to extend to the other end side (toward the insertion port 123). The side of the part 141 is supported.

  As shown in FIGS. 9 and 17, lid-side engaging pieces 128, 128 are formed to protrude from the insertion port 123 of the lid-side engaging portion 120, and the engaging groove portion 153 of the lid-side connecting member 140 is formed. , 153 can be engaged with each other. The two lid-side engaging pieces 128, 128 are inserted into the lid-side engaging portion 120 at intervals of 180 degrees (opposite to each other) in a direction rotated by 90 degrees relative to the protrusion passage portions 126a, 126a. Arranged at the mouth 123.

  As shown in FIGS. 18 to 20, the main body side connecting member 130 is made of a resin material such as ABS resin or polycarbonate (PC) and integrally formed in a cylindrical shape by a molding means such as injection molding that does not have a slide structure. Molded. A pair of body side holes 131 and 131 are formed symmetrically (at intervals of 180 degrees) on the side base end side of the body side connection member 130, and the engagement protrusions 142 and 142 of the lid side connection member 140 Each engages.

  A pair of flanges 132, 132 are formed on the base end portion (lower side in FIG. 20) of the main body side connecting member 130 so as to protrude sideways, and the main body side engaging pieces 113 of the main body side engaging portion 110 are formed. 113 can be engaged with each other. The peripheral portions of the flanges 132 and 132 are formed in accordance with the shape of the inner peripheral portion of the main body side insertion portion 112 of the main body side engaging portion 110, and the main body side connection inserted into the main body side insertion portion 112. The member 130 can rotate about a rotation axis parallel to the insertion direction of the main body side connection member 130. Escape portions 133 and 133 through which the main body side engaging pieces 113 and 113 of the main body side engaging portion 110 can pass are formed in the gap portions of the pair of flange portions 132 and 132, respectively. When the main body side engaging portion 110 is inserted into the main body side opening portion 111 from the main body side opening portion 111, the main body side engaging pieces 113 and 113 are passed through the escape portions 133 and 133, respectively. It can be inserted into the main body side insertion portion 112 of the portion 110.

  Protrusions 134 are respectively formed at the center of the surface of the flange 132, and as shown in FIG. 12, the main body side connection member 130 inserted into the main body side insertion portion 112 is defined as the insertion direction of the main body side connection member 130. The projection 134 is positioned in the engagement hole 114 of the main body side engagement portion 110 by rotating in one direction (clockwise in FIG. 11) by 90 degrees (first predetermined angle) around the parallel rotation axis. Thereby, the collar part 132 and the main body side engaging piece 113 of the main body side engaging part 110 are engaged. Accordingly, the main body side connecting member 130 is engaged with the main body side engaging portion 110 by rotating in the one direction by 90 degrees (first predetermined angle) around the rotation axis parallel to the inserting direction in the main body side inserting portion 112. The main body side connecting member 130 can be easily engaged and disengaged with respect to the main body side engaging portion 110.

  Even if the main body side connecting member 130 is rotated by 90 degrees (first predetermined angle) in the other direction (counterclockwise in FIG. 11), the hook 132 and the main body side engaging piece 113 are engaged. Can do. Further, the pair of flanges 132 and 132 and the protrusions 134 and 134 are arranged in the same direction as the main body side holes 131 and 131 (at intervals of 180 degrees). That is, the escape portions 133 and 133 are arranged at intervals of 180 degrees in a direction rotated relative to the main body side holes 131 and 131 by 90 degrees. Further, a pair of groove portions 135 and 135 are formed at the distal end portion (upper side in FIG. 20) of the main body side connection member 130, and the main body side connection member 130 is picked up by placing a finger on the groove portions 135 and 135. Can be easily rotated.

  As shown in FIGS. 9, 21, and 22, the lid-side connecting member 140 is integrally formed into a substantially frame shape by a molding means such as injection molding using a resin material such as ABS resin or polycarbonate (PC). A substantially cylindrical connecting member engaging portion 141 that can be engaged with the main body side connecting member 130, and connected to the periphery of the connecting member engaging portion 141 so as to be detachably engaged with the lid side engaging portion 120. The ring-shaped holding portion 151 and a connecting member connecting portion 159 that connects the connecting member engaging portion 141 and the holding portion 151 are mainly configured. A pair of engaging protrusions 142 and 142 are formed at the distal end portion of the connecting member engaging portion 141 so as to be elastically deformable, and engage with the main body side hole portions 131 and 131 of the main body side connecting member 130, respectively. It has become.

  A knob 143 is formed at the base end of the connection member engaging portion 141, and the lid-side connection member 140 can be easily rotated by holding the knob 143. Further, as shown in FIG. 24, the knob portion 143 is in a state where the lid-side engaging portion 120 and the lid-side connecting member 140 are engaged with each other (on the upper side in FIG. 24). To protrude. Thereby, the lid side connection member 140 (inserted in the lid side insertion part 125) engaged with the lid side engagement part 120 without using a tool or the like can be easily rotated.

  The holding portion 151 is formed in a ring shape that matches the shape of the inner peripheral portion of the lid-side insertion portion 125 of the lid-side engagement portion 120, and the lid-side connecting member 140 (holding) inserted into the lid-side insertion portion 125. Portion 151) can rotate about a rotation axis parallel to the insertion direction of the lid-side connecting member 140. Passing grooves 152 and 152 through which the lid-side engaging pieces 128 and 128 of the lid-side engaging portion 120 can pass are formed at two positions on the side portion of the holding portion 151 so as to extend in the central axis direction of the holding portion 151. As shown in FIG. 13B, when the lid-side connecting member 140 is inserted into the inside from the insertion port 123 of the lid-side engaging portion 120, the lid-side engaging pieces 128, 128 are inserted into the passage grooves 152, 152, respectively. The holding part 151 (lid-side connecting member 140) can be inserted into the lid-side insertion part 125 by passing it through. Note that the two passage groove portions 152 and 152 are provided on the side portions of the holding portion 151 at intervals of 180 degrees (symmetrically) in a direction rotated relative to the engagement protrusions 142 and 142 by 15 degrees clockwise in FIG. Be placed.

  An engagement groove portion 153 that can engage with the lid side engagement piece 128 of the lid side engagement portion 120 is connected to the passage groove portion 152 at a position relatively rotated counterclockwise by 15 degrees from the passage groove portion 152 in FIG. As shown in FIG. 13C, the lid-side connection member 140 (holding portion 151) inserted into the lid-side insertion portion 125 is rotated around a rotation axis parallel to the insertion direction of the lid-side connection member 140. The lid side engaging piece 128 and the engaging groove portion 153 are engaged with each other by being rotated by 15 degrees (second predetermined angle) in one direction (clockwise in FIG. 13). As a result, the lid-side connecting member 140 (holding portion 151) is set to one less than 15 degrees (second predetermined angle) less than 90 degrees (first predetermined angle) around the rotation axis parallel to the insertion direction in the lid-side insertion section 125. By rotating in the direction, the lid side engaging portion 120 can be engaged, and the lid side connecting member 140 can be easily engaged with and disengaged from the lid side engaging portion 120. Note that the direction of the engagement groove 153 is substantially the same as the direction of the engagement protrusion 142.

  A first stopper portion 154 is formed adjacent to the engaging groove portion 153 (on the opposite side of the passage groove portion 152), and the lid side connecting member 140 (holding portion 151) engaged with the lid side engaging portion 120. Rotation in one direction (clockwise in FIG. 13) is restricted. Further, a second stopper portion 155 is formed adjacent to the passage groove portion 152 (on the opposite side of the engagement groove portion 153), and the lid-side connection member 140 (holding portion 151) inserted into the lid-side insertion portion 125 is formed. The rotation in the other direction (counterclockwise in FIG. 13) is restricted. Further, a chamfered portion 156 is formed on the bottom portion of the holding portion 151 in accordance with the shape of the bottom portion (partition wall 124) of the lid side insertion portion 125.

  In the unauthorized opening prevention mechanism 100 configured as described above, in order to connect the main body side engaging portion 110 and the lid side engaging portion 120 with the case lid member 70 closed with respect to the case main body member 60, first, The main body side connecting member 130 is engaged with the desired main body side engaging portion 110 (for example, the innermost part in FIG. 3), and the lid side connecting member 140 is engaged with the desired main body side engaging portion 110 (described above). And is engaged with a lid side engaging portion 120 that can be connected to the lid. In order to engage the main body side connecting member 130 with the main body side engaging portion 110, first, the main body side connecting member 130 is inserted into the main body side engaging portion 110 from the main body side opening 111, and the main body side engaging portion is then inserted. The main body side connection member 130 is inserted into the main body side insertion portion 112 of the main body side engagement portion 110 so that the main body side engagement pieces 113 and 113 pass through the escape portions 133 and 133 of the main body side connection member 130, respectively. .

  As shown in FIGS. 10 to 12, the main body side connecting member 130 inserted into the main body side inserting portion 112 is rotated 90 degrees (first predetermined angle) around the rotation axis parallel to the insertion direction of the main body side connecting member 130. ) Only in one direction (clockwise in FIG. 11), and the protrusion 134 of the main body side connection member 130 is positioned in the engagement hole 114 of the main body side engagement portion 110, so that the main body side engagement portion 110, the main body side engaging piece 113 and the collar portion 132 of the main body side connecting member 130 are engaged. Thereby, the main body side connecting member 130 is detachably engaged with the main body side engaging portion 110 in a state where the rotation of the main body side connecting member 130 is restricted by a small rotational force. In addition, from the other end side (bottom part) of the main body side engaging part 110, the main body side connecting member 130 cannot be accessed and the main body side connecting member 130 cannot be rotated.

  On the other hand, in order to engage the lid-side connecting member 140 with the lid-side engaging portion 120, first, the connecting member engaging portion 141 of the lid-side connecting member 140 is inserted into the inside from the insertion port 123 of the lid-side engaging portion 120. Then, the connection protrusions 142 and 142 of the connection member engagement part 141 are passed through the protrusion passage parts 126a and 126a of the cover side engagement part 120, respectively, so that the connection member engagement part 141 is passed through the cover side engagement part 120. Are passed through the passage hole 126 and the lid-side opening 121. At this time, the lid-side engagement pieces 128 and 128 of the lid-side engagement portion 120 are disposed in a direction that is relatively rotated by 90 degrees with respect to the protrusion passage portions 126a and 126a. Since the grooves 152, 152 are arranged in a direction relatively rotated by 15 degrees clockwise in FIG. 13 with respect to the engaging protrusions 142, 142 (that is, the protrusion passing portions 126a, 126a), as shown in FIG. As described above, the lid-side engaging pieces 128, 128 cannot pass through the passage groove portions 152, 152 and are in contact with the chamfered portion 156 of the lid-side connecting member 140.

  Next, the knob 143 is picked and the lid-side connecting member 140 is rotated in one direction (clockwise in FIG. 13) by 75 degrees around the rotation axis parallel to the insertion direction of the lid-side connecting member 140, The passage grooves 152 and 152 of the connecting member 140 are aligned with the lid-side engaging pieces 128 and 128 of the lid-side engaging portion 120. Subsequently, as shown in FIG. 13B, the holding portion 151 of the lid-side connecting member 140 is moved to the lid-side engaging portion in a state where the passage groove portions 152, 152 are aligned with the lid-side engaging pieces 128, 128. The holding portion 151 (lid-side connecting member 140) is inserted into the lid-side engaging portion 120 so that the lid-side engaging pieces 128 and 128 are passed through the passage grooves 152 and 152, respectively. Is inserted into the lid side insertion portion 125.

  Then, as shown in FIG. 13C, the lid-side connection member 140 (holding portion 151) inserted into the lid-side insertion portion 125 is moved 15 degrees around the rotation axis parallel to the insertion direction of the lid-side connection member 140. By rotating in one direction (clockwise in FIG. 13) by (second predetermined angle), the lid-side engagement piece 128 of the lid-side engagement portion 120 and the engagement groove portion 153 of the lid-side connection member 140 are engaged. Combine. Thereby, the lid side connection member 140 (holding part 151) engages with the lid side engaging part 120 so as to be detachable. The lid-side connecting member 140 (holding portion 151) in one direction engaged with the lid-side engagement portion 120 by the first stopper portion 154 adjacent to the engagement groove portion 153 (on the opposite side of the passage groove portion 152). Rotation (clockwise in FIG. 13) is restricted. In addition, the second stopper portion 155 adjacent to the passage groove portion 152 (on the opposite side of the engagement groove portion 153) in the other direction of the lid-side connection member 140 (holding portion 151) inserted into the lid-side insertion portion 125 ( The rotation in the counterclockwise direction in FIG. 13 is restricted.

  Next, as shown in FIG. 23, the main body side connecting member 130 is engaged with the main body side engaging portion 110 and the lid side connecting member 140 is engaged with the lid side engaging portion 120 as described above. Then, the case lid member 70 is closed (swinged) with respect to the case main body member 60 so that the lid side engaging portion 120 overlaps the main body side engaging portion 110. Then, as shown in FIG. 26, the engagement protrusions 142, 142 of the lid side connection member 140 (connection member engagement portion 141) abut against the inner side portion of the main body side connection member 130 and elastically deform inward. When the engagement protrusions 142, 142 reach the vicinity of the base end portion of the main body side connection member 130, the engagement protrusions 142, 142 are restored outward and engage with the main body side holes 131, 131 of the main body side connection member 130. That is, the lid side connecting member 140 (connecting member engaging portion 141) is engaged with the main body side connecting member 130, and the main body side engaging portion 110 and the lid side engaging portion 120 are connected.

  At this time, the lid-side connecting member 140 can be rotated 15 degrees (second predetermined angle) in the other direction (counterclockwise in FIG. 13) together with the main body-side connecting member 130 (by picking the knob 143). However, since the main body side connecting member 130 cannot be detached from the main body side engaging portion 110 unless the main body side connecting member 130 is rotated by 90 degrees (first predetermined angle), the main body side connecting member 130 is detached from the main body side engaging portion 110. There is nothing. Further, since the holding portion 151 of the lid side connecting member 140 is in contact with the partition wall 124 of the lid side engaging portion 120 in a state where the lid side connecting member 140 is engaged with the main body side connecting member 130, the case lid member 70. Even if it is intended to open the case main body member 60, the lid side connection member 140 does not separate from the lid side engaging portion 120. That is, in a state where the lid-side connecting member 140 (connecting member engaging portion 141) is engaged with the main body-side connecting member 130, the main-body-side connecting member 130 is detached from the main-body-side engaging portion 110, and the lid-side engaging portion. The detachment of the lid-side connecting member 140 from 120 is restricted.

  In this manner, when the case lid member 70 is closed (swinged) with respect to the case body member 60 and the lid side engaging portion 120 overlaps the body side engaging portion 110, the body side connection is established. The member 130 and the lid-side connecting member 140 are engaged to connect the main body-side engaging portion 110 and the lid-side engaging portion 120, so that the main body-side connecting member 130 is detached from the main body-side engaging portion 110, and the lid The detachment of the lid-side connection member 140 from the side engagement portion 120 is restricted, and the state where the case lid member 70 is attached to the case body member 60 is maintained. Thereby, the main body side engaging part 110 and the lid side engaging part 120 can be easily connected, and the case main body member 60 and the case cover member 70 can be easily coupled and held in the closed state.

  If the case main body member 60 and the case lid member 70 are coupled and held in a closed state by the unauthorized opening prevention mechanism 100, the main body side connection member 130 engaged with the main body side engaging portion 110 and the lid side engagement are provided. It is very difficult to release the engagement with the lid-side connecting member 140 engaged with the joint portion 120. When the main board case 55 (main board assembly 50) is opened, the lid-side connecting portion 129 is cut to open the lid. Since it is necessary to separate the side engaging portion 120 and the case lid member 70, the cutting trace clearly remains after the main board case 55 (main board assembly 50) is opened, and unauthorized opening can be detected at an early stage. And can effectively deter fraud.

  In the main body side engaging portion 110 and the lid side engaging portion 120 in which the main body side connecting member 130 and the lid side connecting member 140 are not engaged, the case main body member 60 is moved (swinged). When closed, the lid side engaging portion 120 only overlaps the main body side engaging portion 110 and overlaps, and the main body side engaging portion 110 and the lid side engaging portion 120 are not connected.

  Next, in the main board assembly 50 in which the case main body member 60 and the case lid member 70 are coupled and held in the closed state as described above, the maintenance and inspection work of the main control board 51 accommodated therein and the inspection of the ROM 52 are performed. The case where it performs etc. is demonstrated. When the ROM 52 is inspected, for example, the lid-side connecting portion 129 with the case lid member 70 of the lid-side engaging portion 120 connected to the main body-side engaging portion 110 is cut using a tool such as a nipper. As a result, the lid-side engaging portion 120 and the case lid member 70 are separated, so that the main substrate case 55 (main substrate assembly 50) can be opened, and the ROM 52 covered with the case lid member 70 is inspected. be able to.

  By the way, four main body side engaging portions 110 and four lid side engaging portions 120 are provided on the other end sides of the case main body member 60 and the case lid member 70, respectively. When the engagement part 120 is connected and the case main body member 60 and the case lid member 70 are coupled and held in the closed state, one set of the main body side engagement part 110 and the lid side engagement part 120 is connected to the main body side. The members 130 and the lid-side connecting member 140 are connected. For this reason, even if the lid side connecting portion 129 of the lid side engaging portion 120 connected to the main body side engaging portion 110 is cut, other sets can still be used, and the inspection of the ROM 52 has been completed as described above. After that, any one set of unused main body side engaging portion 110 and lid side engaging portion 120 are connected by the main body side connecting member 130 and the lid side connecting member 140. For this reason, in the case of the main board assembly 50 in the present embodiment, the inspection can be performed three times along the way.

  In order to connect any one set of unused main body side engaging portion 110 and lid side engaging portion 120 by the main body side connecting member 130 and the lid side connecting member 140, first, the main body side connecting member 130 is connected to the main body side. The main body side connecting member 130 is moved together with the lid side engaging portion 120 and the lid side connecting member 140 separated from the case lid member 70 by performing an operation reverse to that performed when the engaging portion 110 is engaged. Remove from 110. Next, after the main body side connecting member 130 is detached from the lid side connecting member 140 using a jig or the like, an operation reverse to the case where the lid side connecting member 140 is engaged with the lid side engaging portion 120 is performed. Then, the lid-side connecting member 140 is detached from the lid-side engaging portion 120.

  Then, the detached main body side connecting member 130 and lid side connecting member 140 are again engaged with any one set of unused main body side engaging portion 110 and lid side engaging portion 120, and the case lid member 70 is again engaged. What is necessary is just to mount to the case main body member 60. In this way, the case main body member 60 and the case lid member 70 can be coupled and held in the closed state again while reusing the main body side connection member 130 and the lid side connection member 140.

  In the present embodiment, the connecting member connecting portion 159 of the lid side connecting member 140 may be configured to be cut. By doing so, the connection member engaging portion 141 and the holding portion 151 of the lid side connection member 140 are separated by cutting the connection member connecting portion 159 using a tool such as a nipper. The substrate case 55 (main substrate assembly 50) can be opened, and the ROM 52 covered with the case lid member 70 can be inspected. Further, since the lid-side engaging portion 120 and the case lid member 70 are not separated, the case main body member 60 and the case lid member can be replaced by replacing the lid side connecting member 140 (the main body side connecting member 130 can also be replaced). 70 can be held in a closed state again and again. That is, only one set of the main body side engaging portion 110 and the lid side engaging portion 120 may be provided, and the manufacturing cost of the main board case 55 can be reduced.

  In order to connect the main body side engaging portion 110 and the lid side engaging portion 120 again by the main body side connecting member 130 and the lid side connecting member 140, first, the lid side connecting member 140 (the holding portion 151) is engaged with the lid side. An operation opposite to that performed when engaging with the portion 120 is performed, and the separated holding portion 151 is detached from the lid side engaging portion 120. Next, an operation reverse to that performed when the main body side connecting member 130 is engaged with the main body side engaging portion 110 is performed, and the main body side connecting member 130 is moved together with the disconnected connecting member engaging portion 141 to the main body side engaging portion. After being detached from 110, the connecting member engaging portion 141 is detached from the main body side connecting member 130 using a jig or the like.

  Then, the detached main body side connecting member 130 and the new lid side connecting member 140 (the connecting member connecting portion 159 is not cut) are engaged with the main body side engaging portion 110 and the lid side engaging portion 120, and the case lid The member 70 may be attached to the case body member 60 again. At this time, it is preferable to use ABS resin as the material of the lid-side connecting member 140. Thereby, when the cutting operation is performed on the member as described above, the butadiene, which is a component of the ABS resin, has a rubber property, and the member is easily whitened without being cracked. An effect is obtained.

  According to the unauthorized opening prevention mechanism 100 according to the present embodiment described above, the main body side connecting member 130 engaged with the main body side engaging portion 110 and the lid side connecting member 140 engaged with the lid side engaging portion 120 are provided. By engaging, the main body side engaging portion 110 and the lid side engaging portion 120 are connected, so the main body side engaging portion 110 and the lid side engaging portion 120 can be easily connected, and the case The main body member 60 and the case lid member 70 can be easily coupled and held in the closed state. In addition, since the lid side connecting portion 129 is configured to be cuttable, the case lid member 70 can be removed from the case main body member 60 by cutting the lid side connecting portion 129. When the sever is cut, the trace of its destruction remains, so that it can be easily detected and fraud can be effectively deterred.

  Furthermore, since the main body side connecting member 130 and the lid side connecting member 140 are configured to be detachable from the main body side engaging portion 110 and the lid side engaging portion 120, a plurality of case main body members 60 and case cover members 70 are provided. By providing the main body side engaging portion 110 and the lid side engaging portion 120, after the inspection of the ROM 52 is completed, the lid side connecting portion 129 is cut from the main body side engaging portion 110 and the lid side engaging portion 120. The main body side connecting member 130 and the lid side connecting member 140 are detached, and the main body side engaging portion of the set in which the lid side connecting portion 129 is not cut yet using the detached main body side connecting member 130 and the lid side connecting member 140. 110 and the lid side engaging portion 120 are connected to each other so that the case main body member 60 and the case lid member 70 are closed again while the main body side connecting member 110 and the lid side connecting member 120 are reused. It can be coupled held. That is, the case main body member 60 and the case lid member 70 can be coupled and held again (multiple times) with only one set of the main body side connecting member 130 and the lid side connecting member 140.

  Further, if the lid-side connecting member 140 has a severable connecting member connecting portion 159 that connects the connecting member engaging portion 141 and the holding portion 151, the connecting member connecting portion 159 is cut off. The case lid member 70 can be removed from the case main body member 60 by releasing the connection state between the connection member engagement portion 141 and the holding portion 151, but when the connection member connection portion 159 is cut in this way, the destruction thereof Since traces remain, this can be easily detected and fraud can be effectively deterred.

  Further, if the lid-side connecting member 140 has a severable connecting member connecting portion 159 that connects the connecting member engaging portion 141 and the holding portion 151, the main body side connecting member 130 and the lid side connecting member 140 is configured to be detachable with respect to the main body side engaging portion 110 and the lid side engaging portion 120, so that the lid side connecting member 140 (holding) in which the connecting member connecting portion 159 is cut after the inspection of the ROM 52 is completed. 151), the main body side connecting member 130 engaged with the connecting member engaging portion 141 is released from the main body side engaging portion 110, and the connecting member connecting portion 159 is not cut. The case main body member 60 and the case lid member 70 are closed again by connecting the main body side engaging portion 110 and the lid side engaging portion 120 again using the lid side connecting member 140 and the main body side connecting member 130. It can be coupled held in state.

  Further, the main body side connecting member 130 rotates in one direction by 90 degrees (first predetermined angle) around the rotation axis parallel to the insertion direction in the main body side insertion portion 112 in the main body side engaging portion 110. The lid-side connecting member 140 is configured to engage with the engaging portion 110, and around a rotation axis parallel to the insertion direction (first predetermined angle) in the lid-side inserting portion 125 in the lid-side engaging portion 120. The main body side connecting member 130 and the lid side connecting member 140 are connected to the main body side by being configured to engage with the lid side engaging portion 120 by rotating in a single direction by less than 15 degrees (second predetermined angle). The side engaging portion 110 and the lid side engaging portion 120 can be easily engaged and disengaged.

  In addition, in the above-mentioned embodiment, it is comprised so that the case cover member 70 can be removed from the case main body member 60 by cut | disconnecting the lid side connection part 129, but it is not restricted to this, The main body side You may be comprised so that the case cover member 70 can be removed from the case main body member 60 by cut | disconnecting the connection part 119. FIG.

  Moreover, in the above-mentioned embodiment, it is comprised so that the case cover member 70 can be removed from the case main body member 60 by cut | disconnecting the lid side connection part 129 or the connection member connection part 159, but it is restricted to this. It is not a thing. For example, instead of the first stopper portion 154 and the second stopper portion 155 configured in the lid-side connecting member 140, a rotation regulating portion having the same function as the first stopper portion 154 and the second stopper portion 155 is attached to the lid side. The main body side connecting member 130 can be rotated by separating the rotation restricting portion from the lid side engaging portion 120 so that the main body side connecting member 130 and the lid side connecting member 140 are rotatable. The case lid member 70 may be configured to be disengaged from the side engaging portion 110 and be removed from the case main body member 60.

  Next, a second embodiment of the unauthorized opening prevention mechanism will be described with reference to FIGS. Here, FIG. 27 is an exploded perspective view of the unauthorized opening prevention mechanism 200 in the second embodiment, and FIG. 28 shows a process in which the lid-side connecting member 240 is engaged with the lid-side engaging portion 220 in the second embodiment (a). FIG. 29 is a plan view of the lid side engaging portion 220 in the second embodiment, FIG. 30 is a plan view of the lid side connection member 240 in the second embodiment, and FIG. Is a side view of the lid-side connection member 240 in the second embodiment, FIG. 32 is a side sectional view of the unauthorized opening prevention mechanism 200 in the second embodiment, and FIG. 33 is a perspective view of the unauthorized opening prevention mechanism 200 in the second embodiment. FIG. 34 is a sectional view taken along arrows XXXIV-XXXIV in FIG. The unauthorized opening prevention mechanism 200 of this embodiment is different only in the device configuration of the lid side engaging portion 120 and the lid side connection member 140 in the unauthorized opening prevention mechanism 100 of the first embodiment described above, and the other device configurations are the same. Therefore, the same number is assigned to the same part, and the duplicate description is omitted.

  As shown in FIG. 27, the unauthorized opening prevention mechanism 200 according to the second embodiment is connected to four main body side engaging portions 110, 110,... Connected to the case main body member 60 and the case lid member 70. .., The main body side connecting member 130 detachably engaged with the main body side engaging portion 110, and the lid side engaging portion 220 can be engaged and disengaged. A lid-side connecting member 240 that engages with the main body-side connecting member 130 and the lid-side connecting member 240 when the case lid member 70 is closed with respect to the case main body member 60. The joining part 110 and the lid side engaging part 220 are configured to be connectable.

  The lid side engaging portion 220 is a cylindrical case having a lid side opening 221 at one end (lower end in FIG. 27) at the right end of the case lid member 70, similarly to the lid side engaging portion 120 of the first embodiment. It is formed integrally with the lid member 70, and is configured to be opposed to and overlap with the main body side engaging portion 110 when the case lid member 70 is attached to the case main body member 60. Although not shown, a lid side connecting portion (not shown) that connects the case lid member 70 and the lid side engaging portion 220 is formed across the case lid member 70 and the lid side engaging portion 220. ing.

  On one end side of the lid-side engagement portion 220, a lid-side fitting portion 222 having a slightly smaller diameter than the body portion of the lid-side engagement portion 220 is formed similarly to the lid-side engagement portion 120 of the first embodiment. As shown in FIG. 34, when the lid side engaging portion 220 overlaps with the main body side engaging portion 110, the inner side enters the main body side opening portion 111 of the main body side engaging portion 110 and enters the main body side. The engagement part 110 is fitted. Further, a distal end contact portion 222a is formed so as to be connected to the base end portion of the lid side fitting portion 222, and when the lid side engaging portion 220 is opposed to and overlaps with the main body side engaging portion 110, the main body side engagement portion is formed. The edge part of the one end side of the joint part 110 contacts.

  Thereby, when the case lid member 70 is attached to the case main body member 60, the main body side opening 111 of the main body side engaging portion 110 and the lid side opening 221 of the lid side engaging portion 220 are opposed to each other. Closed. Therefore, the lid side engaging portion 220 of the lid side engaging portion 220 is fitted to the main body side engaging portion 110 in a state where the lid side engaging portion 220 faces and overlaps with the main body side engaging portion 110, and the main body side Unauthorized access to the inside of the engaging part 110 and the lid-side engaging part 220 is prevented.

  As shown in FIGS. 27 and 29, an insertion port 223 through which the lid-side connection member 240 can pass is formed at the other end of the lid-side engagement portion 220. A partition wall 224 is formed in the center of the lid side engaging portion 220 so as to block the inside of the lid side engaging portion 220, and the lid side connecting member 240 is adjacent to the other end side of the partition wall 224. The lid side insertion part 225 into which can be inserted is formed.

  A passage hole 226 is formed in the central portion of the partition wall 224 so that the connection member engaging portion 241 (body portion) of the lid side connection member 240 can pass therethrough. Further, a pair of projection passage portions 226a and 226a are formed symmetrically connected to the peripheral portion of the passage hole 226 so that the engagement projections 242 and 242 of the lid side connection member 240 can pass therethrough. Further, a pair of support ribs 227 and 227 are formed on the periphery of the passage hole 226 excluding the protrusion passage portions 226a and 226a so as to extend to the other end side (toward the insertion port 223). The side of the part 241 is supported.

  In the vicinity of the support ribs 227 and 227 in the partition wall 224, a pair of rotation restricting portions 229 and 229 are formed so as to protrude to the passage hole 226 (see FIG. 32), and the connecting member connecting portion of the lid side connecting member 240 259 abuts against the rotation restricting portion 229, and thus the counterclockwise rotation (in the other direction) in FIG. 28 of the lid side connecting member 240 inserted into the lid side inserting portion 225 is restricted. Yes. Note that a rotation restricting portion connecting portion 229a (see FIG. 32) that is a connecting portion between the rotation restricting portion 229 and the partition wall 224 (the lid-side engaging portion 220) is configured to be cuttable.

  Lid side engagement pieces 228 and 228 are formed to project from the insertion port 223 of the lid side engaging portion 220 and are configured to be engageable with the engaging groove portions 253 and 253 of the lid side connecting member 240, respectively. ing. The two lid-side engagement pieces 228 and 228 are inserted into the lid-side engagement portion 220 at intervals of 180 degrees (opposite to each other) in a direction rotated by 90 degrees relative to the protrusion passage portions 226a and 226a. Arranged at the mouth 223.

  The lid-side connecting member 240 is integrally formed in a substantially frame shape by a molding means such as injection molding using a resin material such as ABS resin or polycarbonate (PC), similarly to the lid-side connecting member 140 of the first embodiment. As shown in FIG. 27, the substantially cylindrical connecting member engaging portion 241 that can be engaged with the main body side connecting member 130 and the lid side engaging portion 220 connected to the periphery of the connecting member engaging portion 241 are formed. A ring-shaped holding portion 251 that is detachably engaged with each other, and a connecting member connecting portion 259 that connects the connecting member engaging portion 241 and the holding portion 251 are mainly configured. A pair of engaging protrusions 242 and 242 are formed at the distal end portion of the connecting member engaging portion 241 so as to be elastically deformable, and engage with the main body side hole portions 131 and 131 of the main body side connecting member 130, respectively. It has become.

  A knob portion 243 is formed at the base end portion of the connection member engaging portion 241, and the lid side connection member 240 can be easily rotated by holding the knob portion 243. Further, as shown in FIG. 32, the knob portion 243 is in a state where the lid side engaging portion 220 and the lid side connecting member 240 are engaged with each other (upper side in FIG. 32). To protrude. Thereby, the lid side connection member 240 (inserted in the lid side insertion part 225) engaged with the lid side engagement part 220 can be easily rotated without using a tool or the like.

  The holding portion 251 is formed in a ring shape that matches the shape of the inner peripheral portion of the lid-side insertion portion 225 of the lid-side engagement portion 220, and the lid-side connection member 240 (holding) inserted into the lid-side insertion portion 225. Portion 251) can rotate about a rotation axis parallel to the insertion direction of the lid-side connecting member 240. Passing groove portions 252 and 252 through which the lid-side engaging pieces 228 and 228 of the lid-side engaging portion 220 can pass are formed at two positions on the side portion of the holding portion 251 so as to extend in the central axis direction of the holding portion 251. 28B, when the lid side connection member 240 is inserted into the inside from the insertion port 223 of the lid side engaging portion 220, the lid side engaging pieces 228 and 228 are respectively inserted into the passage grooves 252 and 252. The holding part 251 (lid side connection member 240) can be inserted in the lid side insertion part 225 by allowing it to pass. Note that the two passage groove portions 252 and 252 are located on the side portions of the holding portion 251 at intervals of 180 degrees (symmetrically) in a direction rotated relative to the engagement protrusions 242 and 242 by 15 degrees clockwise in FIG. Be placed.

  An engagement groove 253 that can be engaged with the lid-side engagement piece 228 of the lid-side engagement portion 220 is connected to the passage groove 252 at a position relatively rotated counterclockwise by 15 degrees from the passage groove 252 in FIG. As shown in FIG. 28C, the lid-side connection member 240 (holding portion 251) inserted into the lid-side insertion portion 225 is rotated around a rotation axis parallel to the insertion direction of the lid-side connection member 240. The lid side engaging piece 228 and the engaging groove 253 are engaged with each other by rotating in one direction (clockwise in FIG. 28) by 15 degrees (second predetermined angle). As a result, the lid-side connecting member 240 (holding portion 251) is set to one less than 15 degrees (second predetermined angle) less than 90 degrees (first predetermined angle) around the rotation axis parallel to the insertion direction in the lid-side inserting section 225. By rotating in the direction, the lid side engaging portion 220 can be engaged, and the lid side connecting member 240 can be easily engaged with and disengaged from the lid side engaging portion 220. The direction of the engagement groove 253 is substantially the same as the direction of the engagement protrusion 242.

  Further, a first stopper portion 254 is formed adjacent to the engaging groove portion 253 (on the opposite side of the passage groove portion 252), and the lid side connecting member 240 (holding portion 251) engaged with the lid side engaging portion 220 is formed. Rotation in one direction (clockwise in FIG. 28) is restricted. Further, a chamfered portion 256 is formed on the bottom portion of the holding portion 251 in accordance with the shape of the bottom portion (partition wall 224) of the lid side insertion portion 225.

  In the unauthorized opening prevention mechanism 200 configured as described above, in order to connect the main body side engaging portion 110 and the lid side engaging portion 220 with the case lid member 70 closed with respect to the case main body member 60, Similar to the unauthorized opening prevention mechanism 100 of the embodiment, first, the main body side connecting member 130 is engaged with the desired main body side engaging portion 110, and the lid side connecting member 240 is engaged with the desired main body side engaging member (described above). Engage with the lid-side engaging portion 220 that can be connected to the mating portion 110. The main body side connecting member 130 is engaged with the main body side engaging portion 110 in the same manner as the unauthorized opening prevention mechanism 100 of the first embodiment.

  To engage the lid-side connecting member 240 with the lid-side engaging portion 220, first, the connecting member engaging portion 241 of the lid-side connecting member 240 is inserted into the inside from the insertion port 223 of the lid-side engaging portion 220, The engaging protrusions 242 and 242 of the connecting member engaging portion 241 are passed through the protrusion passing portions 226 a and 226 a of the lid side engaging portion 220, respectively, so that the connecting member engaging portion 241 passes through the lid side engaging portion 220. It passes through the hole 226 and the lid side opening 221. At this time, similarly to the unauthorized opening prevention mechanism 100 of the first embodiment, as shown in FIG. 28A, the lid-side engagement pieces 228 and 228 cannot pass through the passage grooves 252 and 252 and the lid-side connection member. It will be in the state contact | abutted to 240 chamfering part 256. FIG.

  Next, the knob portion 243 is picked and the lid side connection member 240 is rotated in one direction (clockwise in FIG. 28) by about 75 degrees around the rotation axis parallel to the insertion direction of the lid side connection member 240. The passage groove portions 252 and 252 of the connecting member 240 are aligned with the lid side engaging pieces 228 and 228 of the lid side engaging portion 220. Subsequently, as shown in FIG. 28B, the holding portion 251 of the lid-side connecting member 240 is moved to the lid-side engaging portion in a state where the passage groove portions 252 and 252 are aligned with the lid-side engaging pieces 228 and 228. The holding portion 251 (lid-side connecting member 240) is inserted into the lid-side engaging portion 220 so that the lid-side engaging pieces 228 and 228 are passed through the passage grooves 252 and 252 respectively. Is inserted into the lid side insertion portion 225.

  Then, as shown in FIG. 28 (c), the lid-side connection member 240 (holding portion 251) inserted into the lid-side insertion portion 225 is moved 15 degrees around the rotation axis parallel to the insertion direction of the lid-side connection member 240. By rotating in one direction (clockwise in FIG. 28) by (second predetermined angle), the lid side engaging piece 228 of the lid side engaging portion 220 and the engaging groove portion 253 of the lid side connecting member 240 are engaged. Combine. Thereby, the lid side connection member 240 (holding part 251) engages with the lid side engaging part 220 so as to be detachable. The lid-side connection member 240 (holding portion 251) that is engaged with the lid-side engagement portion 220 by the first stopper portion 254 adjacent to the engagement groove portion 253 (on the opposite side of the passage groove portion 252) in one direction. Rotation (clockwise in FIG. 28) is restricted. Further, by the rotation restricting portion 229 formed in the lid side engaging portion 220, the lid side connecting member 240 (holding portion 251) inserted into the lid side inserting portion 225 in the other direction (counterclockwise in FIG. 28). ) Rotation is restricted.

  Next, in the state where the main body side connecting member 130 is engaged with the main body side engaging portion 110 and the lid side connecting member 240 is engaged with the lid side engaging portion 220 as described above, the case lid member 70 is moved. It closes with respect to the case main body member 60 (it rock | fluctuates), and makes it the state which the cover side engaging part 220 opposes and overlaps with the main body side engaging part 110, as shown in FIG. Then, as shown in FIG. 34, the engagement protrusions 242 and 242 of the lid side connection member 240 (connection member engagement portion 241) abut against the inner side portion of the main body side connection member 130 and elastically deform inward. When the engagement protrusions 242 and 242 reach the vicinity of the proximal end portion of the main body side connection member 130, the engagement protrusions 242 and 242 are restored outward and engage with the main body side holes 131 and 131 of the main body side connection member 130. That is, the lid side connection member 240 (connection member engagement portion 241) is engaged with the main body side connection member 130, and the main body side engagement portion 110 and the lid side engagement portion 220 are connected.

  At this time, the lid side connection member 240 can be rotated 15 degrees (second predetermined angle) in the other direction (counterclockwise in FIG. 28) together with the main body side connection member 130 (by picking the knob 243). However, since the main body side connecting member 130 cannot be detached from the main body side engaging portion 110 unless the main body side connecting member 130 is rotated by 90 degrees (first predetermined angle), the main body side connecting member 130 is detached from the main body side engaging portion 110. There is nothing. Further, since the holding portion 251 of the lid side connection member 240 is in contact with the partition wall 224 of the lid side engagement portion 220 in a state where the lid side connection member 240 is engaged with the main body side connection member 130, the case lid member 70. Even if it is going to be opened with respect to the case main body member 60, the lid side connection member 240 does not detach from the lid side engaging portion 220. That is, in a state where the lid-side connecting member 240 (connecting member engaging portion 241) is engaged with the main body-side connecting member 130, the main body-side connecting member 130 is detached from the main body-side engaging portion 110, and the lid-side engaging portion. The separation of the lid-side connecting member 240 from 220 is restricted.

  In this way, when the case lid member 70 is closed (swinged) with respect to the case main body member 60 and the lid side engaging portion 220 overlaps the main body side engaging portion 110, the main body side connection is established. The member 130 and the lid-side connecting member 240 are engaged to connect the main body-side engaging portion 110 and the lid-side engaging portion 220, and the main body-side connecting member 130 is detached from the main body-side engaging portion 110, and the lid The detachment of the lid-side connection member 240 from the side engagement portion 220 is restricted, and the state where the case lid member 70 is attached to the case body member 60 is maintained. Thereby, the main body side engaging part 110 and the lid side engaging part 220 can be easily connected, and the case main body member 60 and the case cover member 70 can be easily coupled and held in the closed state.

  If the case main body member 60 and the case lid member 70 are coupled and held in a closed state by the unauthorized opening prevention mechanism 200 as described above, the main body side connection member 130 and the lid side engagement portion engaged with the main body side engagement portion 110 will be described. It is very difficult to release the engagement with the lid-side connecting member 240 engaged with 220. To open the main board case 55 (main board assembly 50) (by picking the knob 243), the lid side connecting member 240 together with the main body side connecting member 130 is moved in the other direction by 90 degrees (first predetermined angle) (FIG. 28). By rotating with a relatively strong force, the connecting member connecting portion 259 of the lid-side connecting member 240 is brought into contact with the rotation restricting portion 229 of the lid-side engaging portion 220 to rotate the restricting portion connecting portion 229a. It is necessary to release the engagement state between the main body side connecting member 130 and the main body side engaging portion 110 while cutting the wire. Therefore, the cutting trace remains clearly after the main board case 55 (main board assembly 50) is opened, and unauthorized opening can be detected at an early stage, and fraud can be effectively suppressed.

  In the main body side engaging portion 110 and the lid side engaging portion 220 in which the main body side connecting member 130 and the lid side connecting member 240 are not engaged, the case main body member 60 is moved (swinged). When the cover side is closed, the lid side engaging portion 220 only overlaps the main body side engaging portion 110 and overlaps, and the main body side engaging portion 110 and the lid side engaging portion 220 are not connected.

  Next, in the main board assembly 50 in which the case main body member 60 and the case lid member 70 are coupled and held in the closed state as described above, the maintenance and inspection work of the main control board 51 accommodated therein and the inspection of the ROM 52 are performed. The case where it performs etc. is demonstrated. When the ROM 52 is inspected, the knob 243 is picked and the lid-side connecting member 240 is moved together with the main body-side connecting member 130 by 90 degrees (first predetermined angle) in the other direction (counterclockwise in FIG. 28). Rotate with.

  Then, the connecting member connecting portion 259 of the lid side connecting member 240 abuts on the rotation restricting portion 229 of the lid side engaging portion 220 to cut the rotation restricting portion connecting portion 229a, and the rotation restricting portion 229 becomes the lid side engaging portion 220. Therefore, the lid side connection member 240 can rotate in the other direction up to 90 degrees (first predetermined angle) together with the main body side connection member 130, and the main body side connection member 130 and the main body side engagement portion 110 can be engaged with each other. The state is released. As a result, the main body side connecting member 130 engaged with the lid side connecting member 240 can be detached from the main body side engaging portion 110, so that the main board case 55 (main board assembly 50) can be opened. The ROM 52 covered with the lid member 70 can be inspected.

  By the way, four main body side engaging portions 110 and four lid side engaging portions 220 are provided on the other end sides of the case main body member 60 and the case lid member 70, respectively, and the unauthorized opening prevention mechanism 100 of the first embodiment. Similarly to the above, after the inspection of the ROM 52 is completed as described above, any one set of unused main body side engaging portion 110 and lid side engaging portion 220 is connected to the main body side connecting member 130 and the lid side connecting member. Connect by 240. For this reason, also in this embodiment, it is possible to inspect three times in the middle.

  In order to connect any one set of unused main body side engaging portion 110 and lid side engaging portion 220 by the main body side connecting member 130 and the lid side connecting member 240, first, the main body side is used using a jig or the like. After detaching the connecting member 130 from the lid-side connecting member 240, an operation reverse to that performed when the lid-side connecting member 240 is engaged with the lid-side engaging portion 220 is performed, and the lid-side connecting member 240 is engaged with the lid-side engagement. Separate from the joint 220.

  Then, the detached main body side connecting member 130 and lid side connecting member 240 are again engaged with any one set of unused main body side engaging portion 110 and lid side engaging portion 220, and the case lid member 70 is again engaged. What is necessary is just to mount to the case main body member 60. In this case, the case main body member 60 and the case lid member 70 can be coupled and held again in the closed state while reusing the main body side connection member 130 and the lid side connection member 240.

  According to the unauthorized opening prevention mechanism 200 of the second embodiment described above, the main body side connection member 130 engaged with the main body side engagement portion 110 and the lid side connection member 240 engaged with the lid side engagement portion 220. Since the main body side engaging portion 110 and the lid side engaging portion 220 are connected by engaging, the main body side engaging portion 110 and the lid side engaging portion 220 can be easily connected. The case body member 60 and the case lid member 70 can be easily coupled and held in the closed state.

  Further, the rotation restricting portion connecting portion 229a in the rotation restricting portion 229 is configured to be cuttable, and the lid side connecting member 240 is moved in the other direction by 90 degrees (first predetermined angle) together with the main body side connecting member 130 (counterclockwise in FIG. 28). By rotating the cover-side connecting member 240 in contact with the rotation restricting portion 229 and cutting the rotation restricting portion connecting portion 229a, the engagement state between the main body side connecting member 130 and the main body side engaging portion 110 is changed. By releasing, the case lid member 70 can be removed from the case main body member 60, but when the connecting portion is cut in this way, the destruction trace remains so that it can be easily found and illegal acts can be effectively performed. Can be suppressed.

  Further, since the main body side connecting member 130 and the lid side connecting member 240 are configured to be detachable from the main body side engaging portion 110 and the lid side engaging portion 220, a plurality of case main body members 60 and case lid members 70 are provided. By providing the main body side engaging portion 110 and the lid side engaging portion 220, the main body side engaging portion 110 and the lid side engaging portion 220 in which the rotation restricting portion connecting portion 229 a is cut after the inspection of the ROM 52 is completed. The main body side connecting member 130 and the lid side connecting member 240 are detached from the main body side connecting member 130 and the lid side connecting member 240, and the rotation restricting portion connecting portion 229a is not cut yet using the detached main body side connecting member 130 and the lid side connecting member 240. By connecting the joint part 110 and the lid side engaging part 220, the case body member 60 and the case lid member 70 are reused while the body side connection member 130 and the lid side connection member 240 are reused. It can be coupled held again closed state.

  Further, by providing the knob portion 243 on the lid-side connection member 240, the lid-side connection member 240 engaged with the lid-side engagement portion 220 can be easily rotated without using a tool or the like.

  In each of the above-described embodiments, the main body side connecting member 130 is formed in a cylindrical shape, and the lid side connecting member 140 (the lid side connecting member 240) is formed in a substantially frame shape, but this is not limitative. For example, it may be formed in a rectangular parallelepiped or cubic shape having a rectangular cross section, and the main body side connecting member and the lid side connecting member are detachably engaged with the main body side engaging portion and the lid side engaging portion. If it is.

  Further, in each of the above-described embodiments, the main body side connecting member 130 is formed with the main body side hole 131, and the lid side connecting member 140 (the lid side connecting member 240) is formed with the engaging protrusion 142. However, the present invention is not limited to this, and an engagement protrusion may be formed on the main body side connection member, and a main body side hole may be formed on the lid side connection member.

  Further, in each of the above-described embodiments, the case main body member 60 and the case lid member 70 are provided with four sets of the main body side engaging portion 110 and the lid side engaging portion 120 (the lid side engaging portion 220). It is not restricted to this, Only one set may be provided, and a plurality of sets other than the four sets may be provided. Further, in the above-described embodiment, the main body side engaging portion 110 and the lid side engaging portion 120 (the lid side engaging portion 220) are connected to one set at a time, but the present invention is not limited to this. A plurality of sets may be connected at a time.

  Further, in each of the above-described embodiments, the unauthorized opening prevention mechanism 100 (unauthorized opening prevention mechanism 200) according to the present invention is provided in the main board case 55 configured in the main board assembly 50, but the present invention is not limited thereto. Instead, for example, the power supply board assembly 40 may be provided in a board case, and for example, the image control board assembly 18 may be provided in a board case.

  Further, in each of the above-described embodiments, the main board assembly 50 provided with the unauthorized opening prevention mechanism 100 (unauthorized opening prevention mechanism 200) according to the present invention is provided in the pachinko machine PM. However, the present invention is not limited to this. For example, it may be provided in a gaming machine such as a slot machine or a sparrow ball gaming machine.

  Further, in the second embodiment described above, the lid-side connecting member 240 and the body-side connecting member 130 are moved to 90 by bringing the lid-side connecting member 240 into contact with the rotation restricting portion 229 and cutting the rotation restricting portion connecting portion 229a. Although it is configured to be able to rotate in the other direction (counterclockwise in FIG. 28) by a degree (first predetermined angle), it is not limited to this. For example, the connection member connecting portion 259 of the lid side connection member 240 is configured to be cuttable, and the lid side connection member 240 that is in contact with the rotation restricting portion 229 is further rotated in the other direction with a relatively strong force. The connecting portion 259 may be cut to separate the connecting member engaging portion 241 from the holding portion 251.

It is a front view of the pachinko machine shown as an example of the gaming machine provided with the board case having the unauthorized opening prevention mechanism according to the present invention. It is a rear view which shows the back surface side of the said pachinko machine. It is a perspective view of a main board assembly. It is a sectional side view of the main board assembly. It is a disassembled front view of the main board assembly. It is a rear view of a case lid member. (A) is an enlarged view which shows the state which the latching arm latched to the latching protrusion, (b) is an enlarged sectional side view which shows the state which the latching arm latched to the latching protrusion. (A) is an enlarged view showing a state before the locking arm is locked to the locking protrusion, and (b) is an enlarged side sectional view showing a state before the locking arm is locked to the locking protrusion. is there. It is a disassembled perspective view of an unauthorized opening prevention mechanism. It is a perspective view which shows the state which the main body side connection member engaged with the main body side engaging part. It is a top view which shows the state which the main body side connection member engaged with the main body side engaging part. It is a plane sectional view along arrow XII-XII in FIG. It is explanatory drawing which represents the process in which a cover side connection member engages with a cover side engaging part in time series in order of (a)-(c). It is a top view of a main body side engaging part. It is a bottom view of a main body side engaging part. It is the perspective view which looked at the lid side engaging part from the one end side. It is a top view of a lid side engaging part. It is the perspective view which looked at the main body side connection member from the bottom face side. It is a top view of a main body side connection member. It is a front view of a main body side connection member. It is a top view of a lid side connection member. It is a side view of a lid side connection member. It is a sectional side view of the main board assembly of a closed state. It is an enlarged side view (partial sectional view) of the main board assembly in an open state. It is a perspective view of an unauthorized opening prevention mechanism. FIG. 24 is a cross-sectional view along the arrow XXVI-XXVI in FIG. 23. It is a disassembled perspective view of the unauthorized opening prevention mechanism in 2nd embodiment. It is explanatory drawing which represents the process in which the cover side connection member in 2nd embodiment engages with a cover side engaging part in order of (a)-(c). It is a top view of the lid side engaging part in a second embodiment. It is a top view of the lid side connecting member in a second embodiment. It is a side view of the lid side connection member in a second embodiment. It is a sectional side view of the unauthorized opening prevention mechanism in 2nd embodiment. It is a perspective view of the unauthorized opening prevention mechanism in the second embodiment. FIG. 33 is a cross-sectional view taken along arrows XXXIV-XXXIV in FIG. 32.

Explanation of symbols

PM Pachinko machine 50 Main board assembly 51 Main control board (51a board mounting hole)
52 ROM
53 Left connector portion 54 Right connector portion 55 Main board case 60 Case main body member 70 Case lid member 100 Unauthorized release prevention mechanism 110 Main body side engaging portion 111 Main body side opening portion 112 Main body side insertion portion 119 Main body side connecting portion 120 Lid side engagement Joint part 121 Cover side opening part 123 Insertion port 125 Cover side insertion part 129 Cover side connection part 130 Main body side connection member 140 Cover side connection member 141 Connection member engagement part 143 Knob part 151 Holding part 159 Connection member connection part 200 Unauthorized release Prevention mechanism (second embodiment)
220 Lid side engaging part 221 Lid side opening 223 Insertion port 225 Lid side insertion part 229 Rotation restriction part (229a Rotation restriction part connection part)
240 Lid side connection member 241 Connection member engagement portion 243 Knob portion 251 Holding portion 259 Connection member coupling portion

Claims (2)

A case main body member and a case lid member attached to the case main body member are provided, and an electronic component mounted on a gaming machine is controlled inside the case formed by attaching the case lid member to the case main body member. In the substrate case that houses the control board to be
A main body side engaging portion that has a main body side opening portion that opens to one end side, a main body side insertion space is formed therein, and is connected to the case main body member via a main body side connecting portion;
It is connected to the case lid member via a lid side connecting portion, and when the case lid member is attached to the case main body member, it is opposed to the main body side engaging portion and covers the main body side opening. A lid side engagement portion formed to close the side insertion space;
Engaged with said body side engaging portion by being rotated in only one direction a first predetermined angle around the insertion direction parallel to the rotation axis while being inserted from the main body side opening on the main body side inserted in the space A main body side connection member configured to be attached to and removed from the main body side engaging portion by being rotated by a first predetermined angle in the opposite direction ;
A lid-side connecting member that is engaged with and attached to the lid-side engaging portion;
At least one of the main body side connecting portion and the lid side connecting portion can be cut,
The lid-side connecting member is
The cover-side engaging portion is the main assembly side engaging portion in a state of being rotated is mounted engages with the main assembly side engaging portion with the previous SL body-side connecting member is inserted into the main body insertion space When the main body side insertion space is closed by overlapping with the main body side opening, the main body side connection member is connected to both the insertion direction and the rotation direction when the main body side insertion space is closed. a connecting member engaging portion configured to engage Te,
Positioned around the connecting member engaging portion and integrally connected to the connecting member engaging portion, the rotation of at least a second predetermined angle smaller than the first predetermined angle is restricted and the extraction is performed in the insertion / extraction direction. A holding part that is engaged with the lid side engaging part and engaged so as not to be able to
The body-side connecting member is mounted in engagement with the main assembly side engaging portion is rotated while being inserted into the main body insertion space, and the retaining portion is engaged with the cover-side engaging portion in a state where the lid side connection member is attached to the lid-side engaging part by attached Rukoto Te, covering overlapping the main body side opening portion the cover-side engaging portion is opposite to the body-side engagement portion When the main body side insertion space is closed, the connection member engaging portion is inserted into the main body side insertion space and engaged with the main body side connection member in an integrally coupled state in both the insertion direction and the rotation direction. The connection member is configured such that the main body side engaging portion and the lid side engaging portion are coupled, and the holding portion is attached to the lid side engaging portion with the rotation of the second predetermined angle or more being restricted. In front of the engaging portion and the main body side connecting member engaged therewith Said body-side connecting member and the second predetermined angle or more rotation is restricted is held engaged with the main assembly side engaging portion, connecting said body side engaging portion and the lid-side engagement portion is retained The case body member is configured to hold the state where the case lid member is mounted,
Cut at least one of the main body side connecting portion and the lid side connecting portion to release the connection between the case main body member and the main body side engaging portion or the connection between the case lid member and the lid side engaging portion. The case lid member can be removed from the case body member, and the lid side engaging portion is rotated relative to the body side engaging portion in a state where the case lid member is removed to connect to the case body member. A mechanism for preventing unauthorized opening of a substrate case, wherein the main body side connecting member can be removed from the main body side engaging portion by rotating the main body side connecting member in the opposite direction by the first predetermined angle via the lid side connecting member. . The lid-side connecting member is inserted into a lid-side insertion portion in the lid-side engagement portion from an insertion port formed on the side opposite to the side facing the body-side opening, and the insertion is performed in the lid-side insertion portion. The holding portion engages with the lid-side engaging portion by rotating in the one direction by the second predetermined angle around a rotation axis parallel to the direction, and from this engaged state to the one direction By rotating in the opposite direction by the second predetermined angle, the holding portion and the lid side engaging portion are disengaged and can be extracted from the insertion port to the opposite side. The unauthorized opening prevention mechanism for a substrate case according to claim 1.

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