JP2000051493A - Circuit board case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a circuit board case which enables tight closing of a body base and a body cover to be opened for inspection several times while preventing illegal modification of the circuit board. SOLUTION: When isolating a body cover 32B from a body base 32A, a main link piece 104 and a sub link piece 106 connected to a cylinder member 102 used for fixing (namely, a first cylinder member 102 for first operation) are cut off. As a result, the fixed cylinder member 102 is separated from the body cover 32B and the body cover 32B can be removed and separated by sliding it in the direction opposite to that in the mounting thereof. When putting the body cover 32B back to the mounting position again, it is fixed using the second cylinder member 102 from the left. Third opening and the fourth fixing are possible by repeating this operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board case which is mounted on a game machine and protects a circuit board having a plurality of electronic components for electronically controlling the contents of the game.

[0002]

2. Description of the Related Art Conventionally, in a game machine such as a pachinko machine, a special game value can be obtained by electronic control. A board on which a central processing unit (hereinafter, referred to as a CPU) and a storage element (hereinafter, referred to as a ROM), which are hardware for electronic control, are mounted together with other conductive parts and the like, such as contact with the outside and impact. Covered by a protective cover to protect from

[0003] The protective cover is a case made of synthetic resin,
It consists of a main body base and a main body cover. When the inspection of the whole substrate is required, the engaging portion of the case is opened.

In some cases, a small window which can be opened and closed is provided in advance in the main body cover, and in the case of inspection or replacement of the ROM, there is a structure which can be operated only by opening the small window.

[0005]

However, if the main body cover and the main body base are made detachable, unauthorized modification may be performed. At present, the main body cover and the main body base are firmly fixed to each other. I had no choice. Therefore, at the time of the above-mentioned inspection or the like, there is a case where the fixing portion is broken and it has to be replaced with a new main body cover and a new main body base.

In view of the above facts, the present invention provides a circuit board case that prevents unauthorized alteration of a board and that can tightly close a main body base and a main body cover that are opened during an inspection a plurality of times. The purpose is to do.

[0007]

According to a first aspect of the present invention, there is provided a circuit board case which is mounted on a game machine and protects a circuit board having a plurality of electronic components for electronically controlling the contents of the game. A body base for supporting the circuit board, a mounting state for covering the surface of the circuit board opposite to the support surface of the body base with a predetermined space to protect the circuit board, and releasing the covering of the circuit board; And a fixing means provided between the main body base and the main body cover, the fixing means being fixed between the main body base and the main body cover when the main body base and the main body cover are attached, and fixed by the fixing means. A plurality of positions are provided, and each time the cover of the circuit board of the main body cover is released, the fixing portion by the fixing means is cut off and sequentially fixed again at a new fixing portion.

According to the first aspect of the present invention, a circuit board for electronically controlling the contents of a game is attached to the back of the game machine. This circuit board has CPU, RO
A large number of electronic components including an IC chip such as M and RAM are provided. In particular, by replacing an IC chip such as a ROM, the probability of having a special game value can be changed. Therefore, by housing the circuit board in the case, the electronic components on the circuit board are protected from contact with the outside, and at the same time, unauthorized replacement of IC chips such as ROM is prevented.

The circuit board case is composed of a main body base and a main body cover. The circuit board is supported by the main body base and is covered and protected by the main body cover.

The main body cover has a coating release position for releasing the coating of the circuit board with respect to the main body base.
The mounting position for protecting the circuit board can be taken.

Here, at the mounting position of the body cover,
Fix to the main body base with fixing means.

[0012] If the fixing means is to be unfixed improperly, part or all of the fixing means is damaged, and a trace of the damage can be left.

On the other hand, when the main body cover is set to the coating release position,
When checking the circuit board or the like, the fixing means used for fixing is cut off. Thereby, the main body cover can be shifted from the mounting position to the coating release position with respect to the main body base.

After the inspection, in order to protect the circuit board again by the main body cover, it is moved to the mounting position and re-fixed using a new fixing means. That is, the number of the fixing means decreases every time the body cover is shifted from the mounting position to the coating release position. Therefore, if a necessary number is prepared in advance (for example, at least four fixing means are set in advance if three times of opening are required), unauthorized opening can be prevented, and the main body can be prevented when necessary. The cover can be placed at the position where the cover of the circuit board is released.

According to a second aspect of the present invention, in the first aspect of the present invention, a small window is provided in a part of the main body cover, and mounting means for fixing and releasing a member for opening and closing the small window is provided. It is characterized in that it is provided along with the fixing means.

According to the second aspect of the present invention, the small window provided on a part of the main body cover is released when only the ROM inspection is performed, and the main body cover and the main body base are connected when the entire circuit board is inspected. The part to be released is different, such as releasing, and the part to be released can be arbitrarily selected as necessary,
Each release trace can be left.

According to a third aspect of the present invention, in the first or second aspect of the invention, the plurality of fixed positions are arranged close to each other.

According to the third aspect of the present invention, since the fixing positions of the plurality of fixing means are arranged close to each other, work efficiency is improved.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a unit in which the circuit board is fixed to the main body cover is mounted on the main body base. It is characterized by.

According to the fourth aspect of the present invention, the back surface (pattern surface) of the circuit board can be easily inspected by releasing the main body cover and the main body base.

[0021]

FIG. 1 shows a surface of a pachinko game machine 10 according to a first embodiment, that is, a game board surface. The area surrounded by the arc-shaped rail 12 on the playing board surface is a gauge section 14 which is a playing area.

A plurality of nails 16 are driven into the gauge part 14 over the entire surface (only the main nails 16 are shown in FIG. 1). It falls while being guided by the formed guideway. In addition to the nail 16, a windmill 18 is attached at a position symmetrical to the gauge section 14 so as to turn the pachinko ball in an unexpected direction.

Further, the winning portion 20 is provided at a plurality of positions in the gauge portion 14, and a predetermined number of pachinko balls are supplied to the player by inserting a pachinko ball into the winning hole 20. .

The gauge portion 14 is substantially symmetrical in the left-right direction.
Are arranged, and the display section 24 is exposed. Below the display unit 24, a start winning opening 26 for starting the electric accessory unit 22 is provided.

Below the starting winning opening 26, a big winning opening 28 is arranged. The big winning opening 28 is opened for a predetermined time in a state of a so-called hit in the electric accessory unit 22, so that a large amount of pachinko balls can be won. It has a configuration that can be used.

FIG. 2 is an enlarged view of the display unit 24 of the electric accessory unit 22 arranged on the game board of the pachinko game machine 10. As shown in FIG.

The display unit 24 of the electric accessory unit 22
It is composed of a × 3 matrix, that is, six symbol display surfaces 25.

The symbols displayed on the symbol display surface 25 are:
The display order is determined in advance, and is controlled by a plurality of electronic components mounted on the circuit board 30 described later. For example, the same picture (for example, (7, 7, 7)) is lined up in a horizontal line, so that a big hit occurs.

FIG. 3 is a schematic view of the back surface of the pachinko game machine 10 according to the present embodiment.

A circuit board case 32 in which a circuit board 30 is accommodated is mounted on the center left side of the back surface of the pachinko game machine 10. Note that, when the circuit board case 32 is attached to the pachinko game machine 10, the upper direction is indicated by an arrow A.
In other drawings, the direction is clarified by the arrow A.

The circuit board case 32 is mounted such that the connector portion 44 is located on the right side (near the center). The connector portion 44 is exposed to the outside of the circuit board case 32, but at the beginning of molding the circuit board case 32, all portions corresponding to the connector portion 44 are closed.

When the model of the circuit board is determined, the position of the connector portion 44 is recognized, and only the portion corresponding to this portion is post-processed. That is, a thin-walled molded portion 46 is provided at a position that may correspond to the connector portion 44 on the body cover 32B described later, thereby facilitating the penetrating work at the time of post-processing. This is because the position of the connector section 44 may be different depending on the model. As a result, an unnecessary portion (a portion where the connector portion 44 is attached and is not attached) is kept closed by the thin-walled molded portion 46.

As shown in FIG. 4, the circuit board 30 is a rectangular board on which a CPU 52, a ROM 42, a RAM and the like are mounted.
A plurality of electronic components including a C chip are attached,
The electric accessory unit 22 and the like arranged on the game board of the pachinko game machine 10 are controlled by these electronic components. The circuit board 30 is covered with a circuit board case 32 at the time of manufacture in order to protect the circuit board 30 from contact with other conductive parts and the like, impact and the like.

FIGS. 5 to 8 show a circuit board case 32 according to the present embodiment.

The circuit board case 32 is a transparent hard case made of a synthetic resin, and is composed of a main body base 32A for supporting the circuit board 30 and a main body cover 32B for covering the circuit board 30.

The circuit board 30 is fixed by screwing at two places near the opening end of the main body cover 32B. In this state, the surface of the circuit board 30 (the surface on which the electronic components are arranged) is covered with a predetermined space by the main body cover 32B.

On the other hand, the back surface of the circuit board 30 is
2A.

That is, a substantially U-shaped rail portion 33 is formed on a pair of short sides of the main body base 32A. The inner width dimension BW (see FIG. 6) of the rail section 33 is substantially the same as the height dimension CW (see FIG. 6) of the guide section 35 formed on the short side of the opening end of the main body cover 32B. It has been. However, the guide portion 35 is accommodated in the guide groove of the rail portion 33 and has a slidable dimensional tolerance (ΔW) (BW = CW + ΔW).

Here, one of the long sides of the main body base 32A is open, and the other is provided with a stopper portion 37. Thereby, the main body cover 32B and the main body base 32
From the state where A is separated (cover release position), the main body cover 32B is opposed to one of the long sides of the main body base 32A (see FIG. 12), and the guide portion 35 is housed in the rail portion 33 (see FIG. 12). 13), the main body cover 32B is slid and inserted until it comes into contact with the stopper portion 37 of the main body base 32A, whereby the main body cover 32B is superimposed on the main body base 32A with the circuit board 30 interposed therebetween, and the mounting position is set. It can be.

The circuit board case 32 is transparent so that the circuit board 30 accommodated in the circuit board case 32 can be visually observed without being removed from the circuit board case 32. Thus, the appearance inspection can be easily performed while the abnormality of the electronic components mounted on the circuit board 30 is housed in the circuit board case 32. Further, a plurality of circular holes 62 are provided on the side surface of the main body cover 32B, and function as ventilation holes. The circular hole 62 is limited to the side surface and has a diameter of 2 mm or less. This prevents a tool capable of operating electronic components such as wires and tweezers from entering the circular hole 62. Note that wires, piano wires, and the like having a diameter of 2 mm or less have low rigidity, so that they are bent or bent with a small resistance and are not usable. Further, since the circular hole 62 is provided only on the side surface, the structure cannot be reached linearly at the target position.

The main body cover 32B is provided with an opening window portion 60 so as to straddle the side surface and the ceiling surface.

A small cover 64 is detachably attached to the window 60, and the window 60 is closed.

The small cover 64 has a shape obtained by bending a flat plate into a substantially L-shape. A first comb-shaped notch 66 is integrally formed at the end of the surface of the small cover 64 corresponding to the ceiling. In correspondence with the first comb-shaped notch 66,
A second comb-shaped notch 68 is formed on the periphery of the opening window 60 on the ceiling of the main body cover 32B and on the inner side surface of the main body cover 32B so as to protrude inside the cover.
The first and second comb-shaped cutouts 66 and 68 are staggered so that they are tightly fitted to each other. A thin plate 70 is provided on the lower surface (the inner surface of the main body cover 32B) of the second comb-shaped notch 68.
(See FIG. 6) is integrally molded (or attached).
Further, approximately half of the back side of the second comb-shaped notch 68 is thinner than the thickness of the main body cover 32B. A thin portion 66B is formed at the distal end of the first comb-shaped notch 66 corresponding to the deep side, corresponding to the thick portion 66A on the base side.

Here, when the first comb notch 66 is engaged with the second comb notch 68, the thin portion 66B of the first comb notch 66 is connected to the second comb notch. The thick portion 66A overlaps on the back side of the mold notch 68, and the thick portion 66A is located directly above the thin plate 70, and the outer surface of the main body cover 32B and the outer surface of the small cover 64 are flush.

On the other hand, the width direction (long side direction) of the small cover 64
A long groove 72 is formed on both ends at all sides.
Correspondingly, the long grooves 72 are provided at both ends in the width direction of the surface corresponding to the ceiling of the opening window 60 so as to face each other.
The protrusion 74 having a thickness substantially equal to the width of the projection 74 is formed.

For this reason, the small cover 64 is formed such that its ceiling portion is aligned with the height of the ceiling portion of the main body cover 32B and the projection 74 is formed.
The first and second comb-shaped cutouts 66 and 68 can be fitted together by housing the end of the notch in the long groove 72 and sliding the end.

Here, since the long groove 72 and the projection 74 are staggered in plan view of the main body cover 32B,
The opening that is continuous in the vertical direction in plan view is eliminated.
In addition, since the thin plate 70 is located in the gap between the first and second comb-shaped notches 66 and 68 in a state where the small cover 64 substantially closes the opening window 60, the first and second plates are located.
The main body cover 32B is provided even in the gap between the comb-shaped notches 66 and 68.
The opening continuous in the vertical direction in plan view is eliminated.

A projection 76 is formed on the periphery corresponding to the side surface of the opening window portion 60 so as to face each other. The projection 76 serves as a stopper when the small cover 64 is slid. Eliminates continuous openings in the horizontal direction when viewed.

As shown in FIGS. 7 to 9, the small cover 6
4 (hereinafter referred to as the lower end) and the main body cover 32B to the main body base 32A.
The first cylindrical unit 100 which forms a part of the fixing means is integrally formed with the bracket 39 extending in the direction. The bracket 39 is attached to the main body cover 32B.
Although it is in a state of being fixed to the surface, it goes without saying that it may be integrally formed.

Since these first cylindrical units 100 have the same structure, the first cylindrical unit 100 is provided on the main body cover 32B.
The cylindrical unit 100 of FIG.
The description of the first cylindrical unit 100 provided in the first embodiment is omitted.

The first cylindrical unit 100 has four cylindrical members 102 on the body cover 32B side and eight cylindrical members 102 on the small cover 64 side.

The cylindrical member 102 is mounted on the bracket 3
9 are arranged side by side along the side of the lower end. These cylindrical members 102 are attached to the lower end of the bracket 39 by the main connecting pieces 10.
4 respectively. In addition, cylindrical member 1
02 are connected by the sub-connection piece 106.

As shown in FIG. 10, inside the cylindrical member 102, a screw 110 in which a groove of a head to be fitted with the screw driver 106 is a plus groove 108 is accommodated. An external thread 112 is formed in the screw 110 from the tip to an intermediate portion in the axial direction, and a ring-shaped groove 114 is formed at the base of the external thread 112. here,
In a state where the screw 110 is accommodated, a closing lid 118 provided with a plus-type through hole 116 corresponding to the plus groove 108 is attached to the opening of the cylindrical member 102. The closing lid 118 is connected by connecting pieces 119 at the same pitch as the arrangement pitch of the cylindrical members 102, and
The openings of the cylindrical members 102 are simultaneously closed.

On the other hand, in a state where the main body cover 32B is superimposed on the main body base 32A and set to the mounting position, the first coaxial member is provided at a position coaxial with the cylindrical members 102, that is, on the lower surface of the main body base 32A. Cylindrical unit 100
A second cylindrical body unit 120, which also forms an engagement member, is integrally formed.

The periphery of the second cylindrical unit 120 is covered with one large rectangular parallelepiped block 122.
Each circular hole 124 is formed. Note that this circular hole 12
A part of the cylindrical body forming 4 protrudes from the lower surface of the block 122 to form an arc shape 122A.

The arrangement pitch of the circular holes 124 is the same as the arrangement pitch of the cylindrical members 102 of the first cylindrical unit 100.

A screw 110 is screwed into the inner peripheral surface of the circular hole 124. The inner peripheral surface of the circular hole 124 before the screw 110 is screwed is a simple cylinder. The opening of the circular hole 124 is a long hole 12 that accommodates the four circular holes 124.
8 (see FIG. 8).

On the bottom surface of the elongated hole 128, a thin metal engagement plate 130 as a one-way restricting member is placed. The engagement plate 130 has four circular holes 124.
Are formed at the same pitch.

Inside the circular hole 132 of the engagement plate 130, a plurality of pieces 134 are provided in the axial direction. As shown in FIG. 11, the diameter when the tips of the pieces 134 are continuously tied is slightly smaller than the diameter of the screw 110.

A holding plate 136 made of synthetic resin is fitted into the long hole 128, and the engaging plate 130 is sandwiched and fixed at a predetermined position (a position where the circular holes 124 and 132 are coaxial). ing.

A ring-shaped projection 136A is formed on the holding plate 136, and the first cylindrical unit 10
The cylindrical member 102 is fitted tightly with the end face of each cylindrical member 102.

Here, when the screw 110 housed in the cylindrical member 102 of the first cylindrical unit 100 is screwed while being pushed into the circular hole 124 of the second cylindrical unit 120, the screw 110 advances along the section 134. The screw is engaged while being elastically deformed in the direction, and when the tightening is completed, the tip of the piece 134 enters the ring-shaped groove 114 provided in the screw 110.

For this reason, even if the screw 110 is to be unscrewed, the screw 110 cannot be disengaged due to the engagement between the piece 134 and the ring-shaped groove 114.

The mounting position of the main body cover 32B and the main body base 32A is fixed by using one of the four cylindrical members 102 one by one. When the small window 64 is closed by the small cover 64, the window is fixed by using two of the eight cylindrical members 102.

Here, the main body cover 32B is connected to the main connecting piece 104 and the sub-connecting piece 106 of the first cylindrical unit 100.
This fixed part is removed by cutting off the
Can be removed while remaining in the cylindrical unit 120. The main connecting piece 104 and the sub connecting piece 10
6 are preferably connected to each other with a predetermined space (1.5 mm or more) so as to facilitate cutting.

In the present embodiment, four fixing means are provided for fixing the main body cover 32B and the main body base 32A, and each of them is used one by one, so that opening and final fixing can be repeated three times. .

Here, the circuit board 3 accommodated in the circuit board case 32 attached to the pachinko game machine 10
0 may require inspection. In this case, it is necessary to separate the main body cover 32B and the main body base 32A (shift to the coating release position). In such a case, as described above, by removing the fixed portion, the main body cover 32B can be slid, and the circuit board 30 screwed to the main body cover 32B can be removed to perform the inspection.

The operation of the present embodiment will be described below.

The electric accessory unit 22 provided on the game board of the pachinko game machine 10 is controlled by a plurality of electronic components. The electronic components include a CPU 52, a ROM 42,
A RAM IC chip and the like are included, all of which are mounted on a single substrate to form a circuit substrate 30.

The display section 24 of the electric accessory unit 22 is constituted by six symbol display surfaces 25 as shown in FIG. The symbols displayed on the symbol display surface 25 are:
The display order is predetermined.

A plurality of special symbol combinations are stored in the RAM on the circuit board 30 in advance.
Then, the combination of the symbols actually displayed and the combination of the stored symbols are compared, and the result of the comparison (match or mismatch) is determined. If the CPU 52 determines that the comparison results match, a so-called winning state is established, the special winning opening 28 is opened for a predetermined time, and a large amount of pachinko balls are supplied to the player.

The probability that the result of comparison by the CPU 52 coincides with the so-called hit state, that is, the pachinko game machine 1
Since the contents of the game at 0 are controlled by the ROM 42, the contents of the game can be changed by illegally replacing the ROM 42. Therefore, in order to prevent the pachinko game machine 10 from being used improperly, the RO is also required.
Illegal replacement (modification) of M42 must be prevented.

ROM 4 for controlling electric accessory unit 22
The circuit board 30 to which the electronic components such as No. 2 are attached is covered with a circuit board case 32 in order to protect the electronic components from contact with other conductive components and the like, impact, and the like.
The circuit board case 32 is composed of a main body cover 32B in which a main body base 32A and a small cover 64 are joined. After the circuit board 30 is screwed to the open end of the main body cover 32B, the rail portion of the main body base 32A is formed. 33
The main body cover 32B and the main body base 32A are accommodated by sliding the guide portion 35 of the main body cover 32B and sliding.
Are superposed on each other with the circuit board 30 interposed therebetween (mounting position).

In such a state, it is shipped from a manufacturing plant,
As shown in FIG. 3, it is attached to the back of the pachinko game machine 10.

However, the circuit board 30 needs to be inspected. Therefore, when inspecting the circuit board 30,
The main body cover 32B is slid to the left in FIG. 3 with respect to the main body base 32A.
The circuit board 30, which is attached by screws, can be removed. The main body cover 32B is mounted so that the back surface of the circuit board 30 faces the main body base 32A. For inspection of the back surface (pattern) of the circuit board 30, simply remove the main body base 32A from the main body cover 32B. It can be done easily.

After the inspection of the circuit board 30, the main body cover 32B must be overlaid on the main body base 32A. For this purpose, the guide portion 35 of the main body cover 32B is accommodated in the rail portion 33 of the main body base 32A and slid. While inserting.

Hereinafter, the main body cover 32B is repeatedly attached to and detached from the main body base 32A.
A procedure for shifting between the 0 coating release position and the mounting position will be described.

First, in the initial stage, that is, at the factory shipment stage, the main body cover 32B with the screw mounted on the circuit board 30 is set.
Is accommodated in the rail section 33 of the main body base 32A and superposed.

In this state, the first cylindrical unit 100
And the second cylindrical unit 120 are opposed to each other, and the distal end surfaces of the four cylindrical members 102 are tightly fitted to the ring-shaped projections 136A of the holding plate 136.

Next, the first cylindrical member 10 from the left in FIG.
Screw 110 housed in 2 is screwdriver 1
06 (see FIG. 10). At the time of this screwing, before the tip of the screw driver 106 reaches the plus groove 108 of the screw 110, the screw driver 106 is housed in the plus-type through hole 116 formed in the closing lid 118. When the screw driver 106 is rotated in this state, the closing lid 118 is broken, and as a result, the screw driver 106
0 can be reached.

That is, if the closing cover 118 is not damaged, the screw 110 cannot be screwed in. Therefore, different marks are always formed before and after screwing, so that it is possible to visually discriminate.

When the screw 110 is screwed in, it is screwed into the circular hole 124 of the second cylindrical unit 120,
02 and the block 122 are connected. During this screwing operation, the piece 134 of the engagement plate 130 provided at the opening of the circular hole 124 is elastically deformed in the screwing direction. Further, when the tightening is completed, the piece 134 enters the ring-shaped groove 114 provided in the screw 110. The fixing is completed as described above, and the small cover 64 is
Is fixed in two places with the closed.

Here, even if the screw 110 is to be removed, the screw 110 cannot be returned toward the cylindrical member 102 because the piece 134 is fitted in the ring-shaped groove 114. Therefore, the fixed state cannot be released unless the part once fixed is destroyed.

The body cover 3 thus firmly fixed
When the 2B is detached from the main body base 32A, as shown in FIG. 9, the main connecting piece 104 connected to the cylindrical member 102 used for fixing (that is, the first cylindrical member 102 in the first time). And the sub-connection piece 106 are cut off. As a result, the fixed cylindrical member 102 is separated from the main body cover 32B, and the main body cover 32B can be detached by sliding in the opposite direction to that at the time of attachment, and can be separated from the main body base 32A.

When returning the main body cover 32B to the mounting position again after the inspection and accommodation, the second cylindrical member 1 from the left in FIG.
Fix using 02. Thereafter, when detaching, the main connecting piece 104 connected to the second cylindrical member 102 is used.
Then, the sub-connection piece 106 is cut off.

By repeating this, three times of opening,
Four fixings are possible.

In this embodiment, the main body base 32A and the main body cover 3 constituting the circuit board case 32 are provided.
Although 2B is attached and detached while sliding, it is not limited to this method, and other means using a hinge or the like may be used.

Further, the fixing means is not limited to the fitting structure of the ring-shaped groove 114 of the screw 110 and the piece 134 of the engaging plate 130. Needless to say, any structure that can not be released can be used.

The main body cover 32B is attached to the main body base 32.
When separating from A, it is performed by cutting the main connecting piece 104 and the sub-connecting piece 106 connected to the cylindrical member 102, but the present invention is not limited to this.
For example, there is no problem in a structure in which the connecting piece of the second cylinder unit 120 is cut off.

[0090]

As described above, according to the first aspect of the present invention, it is possible to prevent unauthorized alteration of the substrate and to close the main body base and the main body cover which are opened at the time of inspection a plurality of times. It has an excellent effect.

According to the second aspect of the present invention, a part to be released can be arbitrarily selected as necessary, and each release mark can be left.

According to the third aspect of the present invention, since the fixing positions of the plurality of fixing means are arranged close to each other, work efficiency is improved.

According to the fourth aspect of the present invention, since this unit is mounted on the main body base in a state (unit) where the circuit board is fixed to the main body cover, the mounting of the main body cover and the main body base is released. The circuit board can be exposed only by using the backside of the circuit board (pattern surface).
Inspection can also be easily performed.

[Brief description of the drawings]

FIG. 1 is a front view of a pachinko game machine according to the present embodiment.

FIG. 2 is an enlarged view of a display unit of the electric accessory unit applied to the pachinko game machine according to the present embodiment.

FIG. 3 is a rear view of the pachinko game machine according to the present embodiment.

FIG. 4 is a schematic view of a circuit board on which a plurality of electronic components are mounted.

FIG. 5 is a perspective view illustrating an appearance of a circuit board case according to the present embodiment.

FIG. 6 is an exploded perspective view of the circuit board case viewed from the same direction as the direction shown in FIG.

FIG. 7 is an external perspective view of the circuit board case according to the present embodiment as viewed from the back side.

8 is an exploded perspective view of the circuit board case viewed from the same direction as the direction shown in FIG.

FIG. 9 is an enlarged view of a fixing means for fixing the main body cover and the small cover.

FIG. 10 is a sectional view showing a procedure for fixing the fixing means according to the present embodiment.

FIG. 11 is a plan view showing a part of the engagement plate according to the present embodiment.

FIG. 12 is a perspective view (cover release position) showing a state where the main body cover and the main body base are opposed to each other.

FIG. 13 is a perspective view showing a state in which the main body cover is being slid when the main body cover is attached to the main body base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pachinko game machine 32 Circuit board case 32A Body base 32B Body cover 33 Rail part 35 Guide part 39 Bracket 42 ROM 66 First comb notch 68 Second comb notch 70 Thin plate 72 Long groove 74 Protrusion 100 First First cylinder unit 102 Cylindrical member 110 Screw 114 Groove 120 Second cylinder unit 130 Engagement plate

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C088 BC47 DA09 EA16 4E360 AB01 AB12 BA03 BB01 CA02 EA01 EA24 EC20 ED02 GA11 GA43 GA49 GA60 GB89 GB97 GB99 GC08

Claims (4)

[Claims] 1. A circuit board case which is mounted on a game machine and protects a circuit board provided with a plurality of electronic components for electronically controlling the contents of a game, comprising: a main body base supporting the circuit board; A body cover that covers a surface opposite to the support surface of the main body base with a predetermined space to protect the circuit board, and a body cover that can assume a cover-released state in which the circuit board is uncovered; A fixing means provided between the base and the main body cover, the fixing means fixing the main body base and the main body cover in an attached state, wherein a plurality of fixing positions by the fixing means are provided, and the circuit board of the main body cover is provided. A circuit board case characterized in that the fixing portion by the fixing means is cut off and re-fixed sequentially at a new fixing portion each time the cover is released. 2. The circuit according to claim 1, wherein a small window is provided in a part of the main body cover, and mounting means for fixing and releasing a member for opening and closing the small window is provided along with the fixing means. Board case. 3. The circuit board case according to claim 1, wherein the plurality of fixing positions are arranged close to each other. 4. The circuit board case according to claim 1, wherein a unit in which the circuit board is fixed to the main body cover is mounted on the main body base.