JP2002219257A - Board case of game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent illegal remodeling of a control board in a game machine. SOLUTION: A case of a control board disposed inside a game machine such as a pachinko machine or a slot machine for controlling the actuation of the game machine has a base case composed of a body member 30 and a lid member 40 both made of a thermoplastic resin material and having respectively a body side engagement part 35 and a lid side engagement part 45 which can engage each other. When the lid body 40 is closed and connected to the body member 30, the protrusion 38 of the body side engagement part is engaged through the engagement hole 48 of the lid side engagement part; the protrusion 38 protruding from the engagement hole 48 is deformed by heating to form a head 38a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board case for a gaming machine such as a pachinko machine or a slot machine, and more particularly, to cover a periphery of a control board for controlling the operation of the gaming machine to prevent fraudulent acts such as counterfeiting. The present invention relates to a board case for a control board.

[0002]

2. Description of the Related Art In a gaming machine such as a pachinko gaming machine and a slot machine, a control board for controlling the operation of the gaming machine is provided. For example, in a pachinko game machine, a game board and a back mechanism board are provided in a storage frame on the back side of a front frame which is assembled to be openable and closable with an outer frame, and a control board (main board) is mounted on the back mechanism board. ing. This control board is a control board that controls the overall operation of the pachinko machine, including the control of the prize ball payout, the opening and closing control of the electric accessory, the occurrence probability control of the symbol combination, etc. The recorded ROM is mounted and has a role as a central control device for controlling the operation of the pachinko machine. For this reason, the control board is accommodated in the board case so as to be hard to receive tampering such as replacement with counterfeit ROM, and this board case is provided with a means for preventing tampering such that a trace is left when the case is opened. It is provided and configured.

As such a means for preventing unauthorized alteration, for example, there is a means for fastening a plurality of cuttable screw fastening pairs with special screws. This is a case in which a board screw member that corresponds to the side edges of the case body member and the case lid member in a board case that includes a case body member and a case lid member that is openably and closably attached to the case body member. A plurality of screw fastening pairs each having a screw penetration portion are formed, and at least one pair of the screw threaded portion and the screw penetration portion can be operated only in the tightening direction. The screw is formed with an engaging portion only in the direction, and the engaging portion in the loosening direction is helically removed. The screw is hereinafter referred to as “one-way screw” in this specification. A cutable portion is formed between the case lid member and the screw penetration portion.

In the above means, when an administrator opens the board case for maintenance and inspection of the control board, the cut portion of the fastening pair fastened with the one-way screw is cut with a tool such as a nipper, and the screw penetrating portion is cut. By disconnecting from the lid member, the connection between the case lid member and the case body member is released, and the case lid member is opened. After the maintenance and inspection, another fastening pair that has not been fastened is fastened using a one-way screw, and the case lid member is attached and closed to the case body member. A board management sticker that displays the board management number and opening history is affixed to the board case,
The opening manager writes the opening date and the name of the opening person on this board management seal and manages it.

[0005]

According to the above-mentioned means for preventing unauthorized alteration, the one-way screw cannot generally be rotated in the direction of loosening the screw, and it is necessary to cut off the cut portion when opening the board case. Therefore, it seems that the trace is clearly left after the substrate case is opened, and that unauthorized opening is impossible. However, even with such means for preventing unauthorized alteration, clever unauthorized alterations that circumvent it have been found sporadically, and it has been pointed out that such means alone are still incomplete. ing.

For example, an unauthorized person can remove a one-way screw by using a special means without damaging the one-way screw, and attach the one-way screw removed after the unauthorized modification to its original position, so that an unauthorized act can be performed at first glance. Examples of remodeling work that are difficult to see have been discovered, and such cases have been gradually spreading. This is a serious problem that impairs the essential function of the board case, ie, prevents unauthorized remodeling before it occurs, and early improvement was desired.

[0007] The present invention has been made in view of the above-mentioned problems, and it is possible to effectively prevent illegal remodeling by stripping and eradicating the above-mentioned ingenious disguise means, thereby providing a fair game. It is an object of the present invention to provide a game machine board case that can be used.

[0008]

In order to achieve the above object, the present invention comprises a case body member attached to a game machine and a case lid member openably and closably attached to the case body member. It is a board case of a gaming machine that accommodates a control board for controlling the operation of the gaming machine inside a case formed by attaching a lid member. In addition, the substrate case of the present invention has a main body side engaging portion and a lid side engaging portion that can be engaged with the case main body member and the case lid member, and the main body side engaging portion and the lid side engaging portion. At least one of them is formed of a thermoplastic resin material, and when the case lid member is mounted on the case body member, at least one of the engaged main body side engaging portion and the lid side engaging portion is heated and deformed. The board case of the gaming machine is configured so as to be connected.

In the above construction, at least one of the main body side engaging portion provided on the case main body member and the lid side engaging portion provided on the case lid member is formed of a thermoplastic resin material, and the case lid member is attached to the case main body member. At least one of the body-side engaging portion and the lid-side engaging portion engaged at the time of mounting is deformed by heating to connect the case body member and the case lid member. For this reason, when opening the board case, there is no other way but to destroy the heated and deformed connection portion or cut the vicinity of the connection portion (for example, a portion corresponding to the cut portion described above). Can be clearly left. Therefore, it is possible to provide a board case in which illegal remodeling is effectively prevented.

[0010] In this specification, "deform by heating"
The term “deformation” refers to a modification (for example, a deformation in which a cantilever-shaped engagement portion is bent and deformed) in which a target engagement portion is raised to about a thermal deformation temperature and the engagement portion is softened and changed to a predetermined shape. The melting temperature of a part of the target engaging part
Deformation that rises to about (melting point) and locally melts and solidifies to change to a predetermined shape (for example, a deformation that melts and solidifies the head of a rod-shaped engaging part and deforms it into a rivet head) It is a meaning including. Further, the phrase “to be connected by being deformed by heating” is meant to include not only a connection mode of mechanically locking by the shape deformation as described above, but also a connection state of fusing fused engagement portions to each other. .

The main body side engaging portion and the lid side engaging portion are formed of a thermoplastic resin material having different heat deformation temperatures, and when the case lid member is mounted on the case main body member, the engaged main body side portion and the lid side engaging portion are engaged. It is preferable that the board case of the gaming machine is configured such that the engagement portion or the engagement portion having the lower thermal deformation temperature of the lid-side engagement portion is heated and deformed for connection. According to such a configuration, the heat distortion temperature is low (in general, the melting point is low at the same time) by using a jig having a simple configuration such as an iron at a constant temperature.
Only the engaging portion of the material can be selectively heated and deformed for connection.

The main body-side engaging portion has a rod-shaped protrusion made of a thermoplastic resin material and protruding toward the lid-side engaging portion. The lid-side engaging portion receives the protrusion. When the case lid member is attached to the case body member, the projection of the main body side engaging portion is projected through the hole of the lid side engaging portion, and the projection projecting from the hole is provided. It is preferable to connect by deforming by heating. According to such a configuration, the body-side engaging portion and the lid-side engaging portion can be configured with a very simple structure, and the projections projecting from the projection holes are locally heated and deformed even when connected. It can be connected in a simple way.

Further, it is preferable that the main body side engaging portion and the lid side engaging portion have different colors. As a result, the engaging portion deformed by heating (for example, the main body side engaging portion) has a different color from the surrounding engaged portion. Therefore, if any illegal operation is performed on this engaging portion, the trace is visually confirmed. It will be easier. Further, for example, by appropriately changing the color of the engaging portion on the side to be heated and deformed, it is possible to further increase the deterrent to unauthorized modification.

It is also preferable that a stamp is formed on the connection portion that has been deformed by heating. As a result, a specific mark is attached to the engagement portion that has been deformed by heating, so that it is possible to easily visually check whether or not an unauthorized operation has been performed by checking the mark. In addition, by appropriately changing the content of the engraved mark, deterrence against unauthorized remodeling can be further enhanced.

The main body-side engaging portion and the lid-side engaging portion include a plurality of main body-side engaging portions and the lid-side engaging portion which engage with each other. A cutting portion capable of separating the engaging portion is provided between the case body member and the main body side engaging portion and / or at least one of the case lid member and the lid side engaging portion. The board case of the gaming machine is configured such that, when the attached case lid member is opened, the cutting portion of the engagement pair where the main body side engaging portion and the lid side engaging portion are connected is cut and opened. It is desirable. According to such a configuration, when the administrator opens the substrate case, the cutting portion can be easily opened by cutting the cutting portion with a nipper or the like, and when closing the case lid member, an engagement pair different from the cut engagement pair. With regard to the above, the engaging portion is heated and deformed by using a jig dedicated to the manager, and the board case can be closed.
Therefore, by maintaining and managing the dedicated jig, it is possible to effectively prevent unauthorized remodeling.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a board case of a gaming machine according to the present invention will be described below with reference to the drawings, taking an example in which the board case is applied to a pachinko machine.

FIGS. 4 and 5 show a front perspective view and a rear perspective view of the pachinko machine PM, respectively. The front side of a fixed and holding outer frame 1 configured as a machine frame or a body having a predetermined outer rectangular frame size. In addition, a front frame 2 for mounting and dismounting, which has a rectangular frame size corresponding to this, uses opening and closing hinges 3a and 3b disposed on the upper left and lower portions on the front and a locking device 4 disposed inside the right front. Then, it is mounted so as to be openable and closable, and is always kept in a closed state shown in the figure.

In the front side area of the front frame 2, a glass door (also called a glass window) of a rectangular frame size corresponding to this area size is provided.
4 is hinged on the left side edge in FIG. 4 to the front frame 2 and is provided so as to be openable and closable. . On the back side of the front frame 2, a storage frame 6 having a square frame size is provided.
The game board 9 is formed integrally with the game console 9 and can play a pachinko game.
The game area on the front side faces the front of the glass door 5 and is set and held so as to be detachable and replaceable in the vertical position.

The game board 9 is based on a predetermined gauge setting (arrangement setting in which various game parts such as a prize device such as an electric accessory, a symbol display device, a windmill, a lamp, etc. and a large number of game nails are combined). A game area is formed, and a back mechanism board 10 including a reserve prize ball tank 11 and an alignment member 12, a power receiving / input / output terminal board 13, a payout mechanism 14, etc. It is equipped to open and close horizontally.

A main board 25 is provided on the back of the back mechanism board 10. The main board 25 is provided with an arithmetic processing circuit (RO) in which control software unique to the pachinko machine PM is recorded.
M), which is a central control device for controlling the operation of the pachinko machine PM, such as paying out prize balls by the payout mechanism 14, controlling the opening and closing of the electric accessory in the game board 9, controlling the occurrence probability of symbol combinations, etc. This is a control board that controls the operation of the entire pachinko machine PM as a whole. Main board 2
Numeral 5 is accommodated in a board case 20 and fixed with screws in order to prevent unauthorized modification. The board case 5 is integrally and detachably attached to the board holding frame 17 of the back mechanism board 10. It should be noted that the illustration of the connector mounted on the main board 25 and the connector cable removably connected to the connector is omitted in the figure.

As shown in the overall view of FIG. 6, the substrate case 20 includes a case main body member 30 attached to the substrate holding frame 17, and a case lid member 40 detachably attached to the case main body member 30. You. The case main body member (hereinafter, referred to as “main body member”) 30 is
5 is formed in a substantially rectangular box-like form in which a horizontal rectangular base portion 31 on which the mounting 5 is mounted is formed with a wall-shaped standing surface surrounding the left and right sides and below of the substrate, and the upper surface side and the front side are open. ing. On the other hand, a case lid member (hereinafter referred to as “lid member”) 40
Is formed in a substantially L-shape when viewed from the side so as to cover the open surfaces (upper surface and front surface) of the main body member 30, and forms a substrate accommodating space inside when mounted on the main body member 30.

A plurality of engagement pieces 32a bent downward are formed at the front end of the lower standing surface of the main body member 30, and the engagement pieces 32a are received at the lower end of the corresponding lid member 40. An engagement hole 42a is formed to engage with the hole. A protrusion 32 b is formed on the upper edge of the left and right standing surfaces of the main body member 30, and the protrusion 32 b is provided at a position corresponding to the lid member 40.
A lock portion 42b is formed to engage with the lock member. For this reason, the board case 20 tilts the lock portion 42b of the lid member in the forward direction to release the engagement with the main body side projection 32b, and further pulls out the forward direction, so that the lower engagement portion (engagement The lid member 40 can be opened vertically and vertically centering on the engagement portion between the piece 32a and the engagement opening 42a), and the board case 20 can be closed by operating in the opposite direction.

For this reason, the substrate case 20 can be freely opened and closed and detached when the main body member 30 and the lid member 40 are not connected by the sealing means described later.
The main board 25 can be attached / detached and exchanged, maintenance and inspection, etc. can be performed in a state where the main board 25 is opened, and the main board 25 is housed and protected in the board housing space by closing the lid member 40.

At the center of the front of the lid member 40, a model seal 43b indicating the type of the main board 25 accommodated in the board case 20, a control number of the board, and an opening of the board case by an administrator when the board case is opened. A board management seal 43a for recording the history is affixed. Also, the main body member 30
A large number of heat-dissipating pores 34 and 44 are formed in the lid member.

An engagement groove 33 is provided at the left and right ends of the base 31.
a, 33b are formed, and the substrate holding frame 17 of the back mechanism panel 10 is formed.
Are provided with a fixed projection 17a which can be engaged with the engagement grooves 33a and 33b, respectively, and a slide projection 17b which can be slidably moved and fixed in the left-right direction (see FIG. 5).
For this reason, the board case 20 is provided with the engaging groove 3
3a, the slide projection 17b is slid, and is engaged with the engagement groove 33b so as to sandwich the base portion 31, whereby the slide projection 17b can be locked to the substrate holding frame 17, and the slide projection 17b can be moved rightward. By disengaging from the substrate holding frame 17 by sliding to the position shown in FIG.

The main body member 30 and the lid member 40 are both made of a transparent resin material by means of injection molding or the like, so that when the main substrate 25 housed therein is tampered with illegally. It is configured to be visible from the outside. For this reason, the state of the substrate surface (component mounting surface) can be visually checked from the outside of the case in a state where the substrate case 20 is attached to the substrate holding frame 17, and the substrate case 20 is removed from the substrate holding frame 17 and turned over, so that the back surface of the substrate is The state of (solder surface) can be visually confirmed from outside the case.

Now, the substrate case 2 thus configured
0, the main body member 30 and the lid member 40 so that an unauthorized remodeling operation is not performed on the main board 25 housed in the case.
And a closing means for connecting and closing the connection. The closing means comprises an engagement pair of a main body side engaging portion 35 provided on the main body member 30 and a lid side engaging portion 45 provided on the lid member 40, and a plurality of pairs (4 in FIG. Pair) is provided.

FIG. 1 is a cross-sectional view of each pair of engagements after connection, as viewed in the direction of the arrow II in FIG. 6, and FIG. 2 is a front view of the pair of engagements, as viewed in the direction of the arrow II. Figure 3 (a) (b) (c)
And are mutually engaged and connected. Hereinafter, the sealing means will be described with reference to these figures.

The main body side engaging portion 35 includes a plate-like rib 36 projecting laterally from the left and right standing surfaces of the main body member 30, a cylindrical seat 37 formed at an end of the rib 36, and a seat 37. 37
And a rod-shaped projection 38 projecting forward (upward in FIGS. 1 and 3) from the seat 37. On the other hand, the lid side engaging portion 45 is formed with a bottomed cylindrical boss 47 via a bar-shaped cutting portion 46 projecting laterally from the left and right side edges of the lid member 40. An engagement hole 48 for receiving and engaging the protrusion 38 of the side engagement portion is formed.

The above-mentioned components of the main body side engaging portion 35 and the lid side engaging portion 45 show the engaged state in which the lid member 40 is closed, as shown in FIG.
As shown in the figure, the tip of the projection 38 on the main body side passes through the engagement hole 48 on the lid side and protrudes into the cylindrical space of the boss 47,
And the lower end surface of the boss 47 are in contact with each other.

Therefore, before connecting the main body side engaging portion 35 and the lid side engaging portion 45, the two engaging portions 35, 45
Are detachable from each other, and the main body member 30
The cover member 40 can be freely opened and closed.
Note that the other engagement pairs are similarly configured.

After fixing the main board 25 to the base portion 31 of the main body member 30 and closing the lid member 40, the main body side engaging portion 3
When connecting the lid 5 and the lid-side engaging portion 45, the jig J exclusively managed by the administrator is used, and the left and right ones (the first pair of right and left engagements shown in FIG. 6) are connected. The jig J is a dedicated iron for closing the substrate case, and has a spherical concave portion at the tip end so that the temperature of the concave portion can be controlled to a predetermined temperature. Information unique to the administrator (for example, the manufacturer, the competent authority, the time, etc.) is engraved on the spherical surface in the concave portion, and when engraved with the jig J, this engraving is transferred to the other party. Is done.

The administrator closes the lid member 40 and inserts the tip of the jig J into the boss 47 in the engaged state in which the tip of the projection 38 is projected into the cylindrical space of the boss 47 to project the recess. 3C, the projection is melted to transfer the spherical shape of the recess as shown in FIG. 3C, and a rivet-like head 38a is formed at the bottom of the cylindrical space (burn-proof). ). As a result, the head 38a is locked in the boss 47, and the main body side engaging portion 35 and the lid side engaging portion 45 are connected.

Although the transparent resin material is used for both the main body member 30 and the lid member 40, the resin material can be selected so that the thermal deformation temperature of the main body member 30 is lower than that of the lid member 40. . For example, when PC (polycarbonate) is used as the material of the lid member 40, methacrylic resin or A
It is constituted by using a BS resin, PBT or the like, and the same kind of resin material is constituted by using a natural material (low melting point) and a heat resistant grade (high melting point). By setting the set temperature of the jig J at an intermediate value between the thermal deformation temperatures of the two, only the tip of the projection 38 is selectively heated and deformed without thermally deforming the inner peripheral surface and the bottom surface of the boss 47. A head 38a can be formed.

In the connection portion thus connected and closed, the projection 38 of the main body side engagement portion is irreversibly heated and deformed to form the head portion 38a, so that the screw is removed reversibly. Cannot be restored to the original state. When an administrator having a legitimate authority opens the board case 20 for maintenance inspection and on-site inspection of the main board 25,
The cutting portion 46 formed on the lid member 40 is cut with a tool such as a nipper, and the lid side engaging portion 45 connected to the main body side engaging portion 35 is cut.
Is disconnected from the lid member 40 to release the connection and open the lid member 40. For this reason, a trace of cutting remains on the substrate case 20 and a trace of opening the lid member 40 can be clearly left.

After completion of maintenance and the like, another engaging pair (for example, the right and left engaging pairs shown in FIG. 6) which has not yet been connected by the administrator is connected using a dedicated jig J, and the main body member is connected. 30
The lid member 40 is attached and closed. Then, the opening history is managed by describing the opening date and the name of the administrator on the board management seal 43a on the surface of the board case.

As described above, in the connection portion which has been connected and closed by utilizing the heat deformation of the resin material, the connection member cannot be reversibly restored to the original state by removing the screw. Cannot be opened unless any part of the substrate case 20 is destroyed. In particular, since the head 38a, which is a connection portion, is formed at the bottom of the boss 47, the head 3a
It is extremely difficult to cut off only the inner surface 8a of the boss 47 or the head 38a.
A clear trace such as a scratch mark or deformation is left on the surface or the joint surface between the seat 37 and the boss 47. Further, both the main body side engaging portion 35 and the lid side engaging portion 45 are transparent, and even if only the head portion 38a can be cut, the cut portion becomes cloudy and it is easy to find this discoloration state.

The main body member 30 and the lid member 40 need to be transparent from the viewpoint of preventing unauthorized alteration, but they can be so-called colored transparent colors.
0 and the lid member 40 can be configured with different transparent colors. For example, the lid member 40 has a normal transparent color, and the main body member 30 is formed of a resin material colored with transparent blue, transparent red, or the like. According to such a configuration, since the colors of the boss 47 and the head 38a are different, it is easy to confirm the presence or absence of an abnormality. For example, it is necessary to periodically change the color (for example, for each manufacturing lot or when replacing the board case). This also makes it possible to virtually prevent unauthorized counterfeiting.

Therefore, according to the board case 20 as described above, when an unauthorized opening operation is performed, a trace of the unauthorized opening operation can be reliably left, so that an actually performed illegal operation can be easily found. And a high level of deterrence, thereby providing a fair game environment.

In the above description, an example in which the main body side engaging portion 35 is formed integrally with the main body member 30 and the lid side engaging portion 45 is formed integrally with the lid member 40 has been disclosed.
Reference numeral 5 may be a separate member mechanically (for example, screwed or fitted) or chemically (for example, bonded or welded) connected to the main body portion, and an engagement portion for further deformation is a thermoplastic resin which can be deformed by heating. If so, the main body and the lid member 40 may be made of another resin material or a metal material (for example, a metal frame).

Further, in the embodiment, the example in which the rod-shaped projection 38 is melt-deformed and connected is disclosed. However, the connection form is not limited to the above-described embodiment. Alternatively, a connection form may be employed in which the tab-shaped main body side engaging piece is bent and deformed (heated) from the left and right and locked.

[0042]

As described above, according to the present invention, at least one of the main body side engaging portion and the lid side engaging portion is formed of a thermoplastic resin material in the board case including the case main body member and the case lid member. Then, when closing the substrate case, at least one of these engaging portions is heated and deformed to connect the case body member and the case lid member. For this reason, when opening the substrate case, any part of the case must be broken, such as by cutting a cut portion provided for opening, and a trace of opening the substrate case can be clearly left. Accordingly, it is possible to provide a board case that can easily detect an illegal remodeling action and can effectively suppress the illegal action and provide a fair game environment.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a preferred embodiment of a board case according to the present invention, and is a partial sectional view showing a relationship between a main body side engaging portion and a lid side engaging portion in a connected state.

FIG. 2 is a top view illustrating a relationship between a main body side engaging portion and a lid side engaging portion in the connection state.

FIG. 3 shows the connection process of the substrate case according to the present invention from (a).
It is explanatory drawing shown in order of (c).

FIG. 4 is a front side perspective view of a pachinko machine shown as an example of a gaming machine to which the board case according to the present invention is applied.

FIG. 5 is a rear perspective view of the pachinko machine.

FIG. 6 is an overall perspective view of the board case showing an embodiment of the board case according to the present invention.

[Explanation of symbols]

 PM Pachinko machine (game machine) 20 Board case 25 Main board (control board) 30 Case main body member 35 Main body side engaging part 38 Projecting part 40 Case lid member 45 Lid side engaging part 46 Cutting part 48 Engaging hole (hole) )

Claims (6)

[Claims] 1. A case, comprising: a case main body member attached to a game machine; and a case lid member openably and closably mounted to the case main body member, wherein the case main body member is provided with the case lid member. A board case of a gaming machine accommodating a control board for controlling operation of the gaming machine therein, wherein a main body side engaging portion and a lid side engaging portion capable of mutually engaging with the case main body member and the case lid member. With
At least one of the main body side engaging portion and the lid side engaging portion is formed of a thermoplastic resin material, and when the case lid member is mounted on the case main body member, the engaged main body side A board case for a gaming machine, wherein at least one of an engaging portion and a lid-side engaging portion is heated and deformed for connection. 2. The main body-side engaging portion and the lid-side engaging portion are formed of a thermoplastic resin material having different heat deformation temperatures. 2. The board case for a gaming machine according to claim 1, wherein the engaging portion having a low thermal deformation temperature of the combined main body side engaging portion or lid side engaging portion is heated and deformed for connection. 3. The main body-side engaging portion has a rod-shaped protrusion made of a thermoplastic resin material and protruding toward the lid-side engaging portion. The lid-side engaging portion has the protrusion. A hole that receives and penetrates the case. When the case lid member is attached to the case body member, the protrusion of the body-side engagement portion projects through the hole of the lid-side engagement portion. 3. The board case of a gaming machine according to claim 1, wherein the projections projecting from the holes are connected by heating deformation. 4. The board case for a gaming machine according to claim 1, wherein the main body side engaging portion and the lid side engaging portion have different colors. 5. The board case of a gaming machine according to claim 1, wherein an engraved mark is formed on the engagement portion that has been deformed by heating. 6. The main body-side engaging portion and the lid-side engaging portion include a plurality of mutually engaging pairs of the main-body-side engaging portion and the lid-side engaging portion. A cutting portion capable of separating an engaging portion between the case main body member and the main body side engaging portion and / or at least one of the case lid member and the lid side engaging portion in the mating. When opening the case lid member attached to the case main body member, cutting the cutting portion of the engagement pair where the main body side engaging portion and the lid side engaging portion are connected. The board case of a gaming machine according to any one of claims 1 to 5, wherein the board case is opened.