JPH10328384A - Circuit substrate case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a ROM from being fraudulently replaced, and at the same time, tightly close an opening which is formed at the time of inspection of the ROM a plurality of times. SOLUTION: When a small cover is removed from an opening window 60, a main connecting piece 104 and a subsidiary connecting piece 106 which are connected to cylindrical members 102 (in the case of first time, first and fifth), are cut off. Thus, the cylindrical members 102 are separated from the small cover, and the small cover can be removed. After the completion of an inspection, when the opening window 60 is closed again by the small cover, it is fixed by using second and sixth cylindrical members 102 from the left. When the small cover is removed after that, the main connecting piece 104 and the subsidiary connecting piece 106 which are connected to the second and sixth cylindrical members 102 are cut off. By repeating this, three times of openings, and four times of fixations become possible.

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 central processing unit (hereinafter, referred to as CPU) and a storage element (hereinafter, referred to as ROM), which are hardware for the electronic control, are provided with a protective cover to protect them from contact with other conductive parts and the like and shocks. Coated. In addition, since the content of the game (such as the probability of having a special game value) can be changed by replacing an IC chip such as a ROM, there is a problem that the game machine is illegally used. To solve this problem, the protective cover is valuable.

[0003] The protective cover is a case made of synthetic resin,
It consists of a main body base and a main body cover. RO
When replacing an IC chip such as M, the engaging portion of the case is opened.

Here, in order to prevent unauthorized replacement of an IC chip such as a ROM or the like, a sealing seal is attached to the engaging portion of the case from the outside. The sealing seal is composed of two sheets each having a front seal adhered to the surface of the back seal, and the adhesive strength of the adhesive of the back seal is stronger than the strength of sticking the front seal to the surface of the back seal. When peeled off, only the front seal is peeled off, and the back seal remains in the case, cannot be restored to the original state, and it can be recognized that the sealing seal has been peeled off.

[0005]

However, since a circuit board on which electronic components such as a ROM are conventionally mounted is completely covered with a case (protective cover), the sealing seal is provided between the main body base and the main body cover. Affixed from outside the joint. Therefore, if the sealing seal is completely removed and re-attached,
In some cases, it has not been possible to recognize that an IC chip such as an OM has been illegally replaced.

A circuit board case that uses a part of a main body cover as a lid to close an opening for performing a ROM inspection has been proposed. However, a gap is formed at a boundary between the main body cover and the lid. Because it is generated, I
There was a possibility that the C chip was tampered with.

The present invention has been made in consideration of the above-described circumstances, and provides a circuit board case capable of preventing unauthorized replacement of a ROM and tightly closing an opening formed during inspection of a ROM a plurality of times. With the goal.

Further, in addition to the above object, there is provided a circuit board case capable of promptly recognizing the possibility of fraud by leaving a trace of the opening even if the main body cover or the like is illegally opened. With the goal.

[0009]

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. The main body base supporting the circuit board and the surface opposite to the support surface of the main body base of the circuit board are fixed to the main body base in a non-removable state so as to cover with a predetermined space, thereby protecting the circuit board. And a casing composed of a main body cover partially provided with an opening window, a small cover for closing the opening window, the small cover, a main body base or a main body cover,
And fixing means for fixing the small cover in a closed state, wherein the fixing means is configured such that part or all of the fixing means is broken at the time of releasing the fixing, and a trace of the releasing of the fixing remains. It is characterized in that a plurality of fixing positions by the fixing means are provided, and each time the small cover is removed, the fixing portions are cut off and sequentially fixed at new fixing positions.

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 includes a main body base and a main body cover. After supporting the circuit board on the main body base and covering the circuit board with the main body cover, the entire circumference where the main body base and the main body cover are in contact is fixed so that it cannot be removed, and the circuit board is accommodated. An opening window is provided in the main body cover, and the opening window is closed by a small cover and fixed by 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 it is necessary to inspect the internal electronic components by opening the opening window, the fixing means used for fixing is cut off. Thereby, the small cover can be removed from the opening window.

After the inspection, the opening window is closed by the small cover, and re-fixed using a new fixing means. That is, each time the small cover is removed, the number of fixing means decreases. 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,
When necessary, the opening window can be easily opened.

According to a second aspect of the present invention, a projection is provided on one of the periphery of the opening window or the outer periphery of the small cover, and the projection is housed on the other of the periphery of the opening window or the outer periphery of the small cover. A small groove is provided, and the protrusion is slid within the long groove to attach / detach the small cover to / from the opening window.

According to the second aspect of the invention, when the small cover and the opening window are simply brought into contact with each other with a thick surface, a slight gap may be formed. Therefore, the projections and the long grooves are provided so as to be alternately arranged in a plan view, and the small cover is attached to and detached from the opening window while sliding. Thereby, it is possible to prevent the wire or tweezers or the like that operates the internal electronic components from entering the casing.

[0017] By sliding and attaching and detaching, this serves as a guide, and the attaching and detaching workability is also improved.

According to a third aspect of the present invention, the fixing means is attached to one of the small cover and the casing.
A first cylindrical body in which an engagement member is housed, and which is attached to the other of the small cover or the casing and is coaxial with the first cylindrical body when an opening window of the small cover is closed; A second cylinder accommodating a one-way restricting member that accepts engagement by entry of the engagement member and inhibits disengagement by withdrawal; the first cylinder and the second cylinder It is characterized in that a plurality of fixing means constituted by a body unit can be independently cut off.

According to the third aspect of the invention, the engaging member housed in the first cylindrical body is advanced into the second cylindrical body with the small cover attached to the opening window. . This approach has low friction and can be easily performed.

On the other hand, when the engaging member is to be extracted, the movement in the extracting direction becomes high friction, and the movement in the extracting direction is suppressed. For this reason, if an attempt is made to forcibly release the fixing means, the peripheral components will be damaged due to forcible movement of the engaging member, and a trace will remain.

For example, if the unit of the first cylinder and the second cylinder is partially fixed to the small cover and the casing, the work at the time of resection becomes easy.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the engaging member is formed with a male screw and a ring-shaped groove with a reduced diameter is formed at a base of the male screw portion. The one-way restricting member is formed of a thin metal plate, and a hole through which the screw passes is provided coaxially with the second cylindrical body. Further, an intermittent tongue inclined in the direction of tightening by the screw is formed, the tongue elastically deforms when screwed by the screw, allows the movement of the screw in the tightening direction, and when screwing is completed, the tongue is It is characterized in that the elastic deformation of the screw is released and the screw is accommodated in the ring-shaped groove to prevent the screw from coming out.

According to the fourth aspect of the present invention, there is shown a more structurally simple and effective embodiment of the fixing means of the third aspect.

That is, a ring-shaped groove is formed at the base of the male screw portion provided on the screw. In this case, it is preferable to hold the screw in one member (in the first cylinder, in claim 3) by screwing or the like.

Here, the first cylinder and the second cylinder are aligned coaxially and screwed into the second cylinder while rotating the screw. At this time, it interferes with the tongue piece of the thin metal plate provided coaxially with the second cylinder, but because the tongue piece is inclined in the tightening direction, it elastically deforms in accordance with the screwing, and this tightening is performed. There is no hindrance.

When the screwing is completed, the tongue piece corresponds to the ring-shaped groove of the screw, so that the elastic deformation is released and enters the groove. In this state, even if the screw is rotated in the loosening direction, the screw cannot be loosened because the tongue prevents the screw from moving in the axial direction. Even if the thread (female thread side) of the second cylinder is damaged by applying excessive force, it cannot be separated from the thread, so that unauthorized opening can be prevented.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, when the screw is housed in the first cylinder, the opening for housing is relatively easily broken. It is characterized by the fact that a lid is attached.

According to the fifth aspect of the present invention, the screw is usually screwed into the screw driver so that the screw driver is fitted into a groove (a plus groove, a minus groove, a hexagonal groove, etc.) provided in the head of the screw. Tightening or the like is performed by generating a large torque for the screw with a relatively small torque. Therefore, a clear trace can be left before and after the screwing of the screw, so that the visual determination can be facilitated.

According to a sixth aspect of the present invention, there is provided 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 the game, the main body supporting the circuit board. The base and the circuit board are fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface of the main body base with a predetermined space, protect the circuit board, and partially open the circuit board. A casing formed of a main body cover provided with a window, a small cover for closing the opening window, the small cover, and a main body base or a main body cover are provided between the small cover and the small cover in a closed state. Fixing means for fixing, wherein at least two or more of the integrated circuit board, the main body base, the main body cover, and the small cover are provided with the same erasable mark on at least two of them. It is characterized in that denoted by means.

According to the sixth aspect of the present invention, the integrated circuit board, main body base, main body cover and small cover are not replaced with other members thereafter, but are temporarily replaced by inspection or the like. Even if it is removed, the same member is used again.

Therefore, the same identification code is printed on all these components in a non-erasable state and written, so that even if the components are replaced by unauthorized use, the identification codes will not match. And can be quickly recognized.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, the non-erasable printing means is a thermal process including a laser and an ultrasonic wave, and the discrimination is performed by unevenness due to the thermal process. It is characterized by expressing a code.

According to the seventh aspect of the present invention, irregularities are formed on the identification code by thermal processing, and for example, numbers and characters are expressed by the irregularities. In this case, copying or the like can be prevented by processing with a laser or ultrasonic waves and using an identification code that is difficult to reproduce.

According to an eighth aspect of the present invention, in the invention of the sixth or seventh aspect, the identification code is at least two of an integrated circuit board, a main body base, a main body cover, and a small cover. It is characterized by being described over the above.

According to the eighth aspect of the present invention, the identification code is written across at least two of the circuit board, the main body base, the main body cover, and the small cover.
The relative positional relationship of two or more members straddling is established, and it is possible to leave traces of incorrect disassembly and reassembly.

According to a ninth 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, wherein the main body supports the circuit board. The base and the circuit board are fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface of the main body base with a predetermined space, protect the circuit board, and partially open the circuit board. A casing formed of a main body cover provided with a window, a small cover for closing the opening window, the small cover, and a main body base or a main body cover are provided between the small cover and the small cover in a closed state. Fixing means for fixing, and a plurality of connectors provided on the circuit board and connectable to a harness for transmitting a signal to the outside, which are previously formed in the body cover in a molding step. It is characterized by forming a passage hole at a position corresponding to the connector.

According to the ninth aspect of the present invention, a printed wiring is provided in a portion of the circuit board where the connector is provided, and the area of the body cover corresponding to the position where all the connectors can be provided in advance is provided. Is opened, there is an opening in an unnecessary connector area, which is a non-common connector, and as a result, the printed wiring is exposed. For this reason, an opening member can be detachably attached to a molding die or the like so that all of the connector disposable positions can be selectively opened. Is detachable at each position where the connector can be arranged. Thereby, unnecessary openings can be eliminated.

According to a tenth aspect of the present invention, there is provided 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 the game, the main body supporting the circuit board. The base and the circuit board are fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface of the main body base with a predetermined space, protect the circuit board, and partially open the circuit board. A casing configured by a main body cover provided with a window, a small cover for closing the opening window, the small cover, and a main body base or a main body cover,
Fixing means for fixing the small cover in a closed state, and a plurality of connectors provided on the circuit board and connectable to a harness for transmitting signals to and from the outside, wherein different ones of the plurality of connectors are provided. In the case of a common connector arranged at a common position between the models, a through hole of the common connector is previously formed in a molding step on the main body cover corresponding to an arrangement area of the common connector, In the case of a non-common connector disposed at a non-common position between different models, the body cover corresponding to at least all regions where the non-common connector can be disposed has a thinner portion than other regions. Is formed.

According to the tenth aspect of the present invention, a printed wiring is provided in a portion where the connector is provided on the circuit board, and a region of the body cover corresponding to a position where all connectors can be provided in advance is provided. Is opened, there is an opening in an unnecessary connector area, which is a non-common connector, and as a result, the printed wiring is exposed. For this reason, an opening is provided in the main body cover in a molding stage in advance for a common connector installation area such as a power supply intake, and other non-common connector installation areas are closed, but are thinner than other areas. (Thin part). This thin portion can be easily opened by post-processing.

The invention according to claim 11 is the invention according to claim 1.
In the invention described in Item No. 0, the thin portion is a continuous rectangular region including the disposition position of the non-common connector.

According to the eleventh aspect of the present invention, the thin portion may be provided for each connector. However, it is easier to form a thin rectangular portion including a continuous rectangular area including the disposition position of the non-common connector. It is also possible to flexibly respond to future design changes and the like.

According to a twelfth aspect of the present invention, there is provided 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 the game, the main body supporting the circuit board. The base and the circuit board are fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface of the main body base with a predetermined space, protect the circuit board, and partially open the circuit board. A casing configured by a main body cover provided with a window, a small cover for closing the opening window, the small cover, and a main body base or a main body cover,
Fixing means for fixing the small cover in a closed state, and flatness of the circuit board case in an assembled state by the fixing means,
And a sticker attached at a position where priority is given to visibility.

According to the twelfth aspect of the present invention, it has been conventionally required to attach a sealing seal as a seal. The function of this sealing seal is as follows: traces of the attachment / detachment of the main body cover and the main body base and the history of inspections and the like. Thus, the pasting position was limited. However, in the circuit board case of the present invention, since the main body cover and the main body base are not detachable, the degree of freedom of the attaching position is increased. For this reason, it is only necessary to consider another function, history,
A sticker can be attached with priority given to visibility. Further, in the case of the history, since there is a possibility of being stamped, the upper surface or the side surface of the main body cover having the flatness, for example, is optimal.

According to a thirteenth aspect of the present invention, there is provided 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 the game, wherein the main body supports the circuit board. The base and the circuit board are fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface of the main body base with a predetermined space, protect the circuit board, and partially open the circuit board. A casing configured by a main body cover provided with a window, a small cover for closing the opening window, the small cover, and a main body base or a main body cover,
A fixing means for fixing the small cover in a closed state, and the main body base, the main body cover and / or the small cover are attached to at least one of the information expression part and all the necessary information in advance. And an information expression section having an index section for indicating necessary information.

According to the thirteenth aspect of the present invention, the information expression section includes an information expression section in which all necessary information is expressed in advance, an index section for indicating necessary information from the information expression section, In this case, the information expression section may have the same shape, and only the index direction of the index section may be changed, so that the expression and change of the information are facilitated.

According to a fourteenth aspect, in the first aspect,
In the invention described in 3, the information expression in the main body base, the main body cover, and the small cover is at least transparent, and the information expression part is an inscription represented by unevenness, and a plurality of types of manufacturing years as the information; All manufacturing dates and times are stamped in advance at predetermined positions, and the indicator unit indicates the corresponding manufacturing date, and the stamp is stamped on the position where visibility is prioritized, and on the back side. It is characterized by:

According to the fourteenth aspect of the present invention, the information is the date of manufacture, which is represented by an engraved mark expressed by unevenness.

For example, as production year, '97, '98, '99, '0
0, '01 etc. Engraved in anticipation of 4-5 years ahead,
In 1997), '97 is indicated by an arrow or the like. If the year changes, only the direction indicated by the arrow needs to be changed. Also,
The manufacturing date may be marked with a number from 1 to 12 for the month and a number from 1 to 31 for the day in advance, and the current number may be indicated by an arrow or the like.

Further, such a mark is given a position where priority is given to visibility, and by marking on the back side, the contents of the mark can be recognized because the body cover, the body base and the small cover are transparent, and the mark can be changed. In a state where it is impossible to do so.

[0050]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) 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 opening 20. .

The gauge portion 14 is substantially symmetrical with respect to the right and left.
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, which is opened for a predetermined time in a so-called winning display state on the electric accessory unit 22, and 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 is
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 first embodiment.

A circuit board case 32 in which a circuit board 30 is accommodated is attached to 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 so 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 main 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 first 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 that supports the circuit board 30 and a main body cover 32B that covers the circuit board 30.

The main body cover 32B is provided with an opening window portion 60 so as to straddle the side surface and the ceiling surface. The main body base 32A and the main body cover 32B, which constitute the circuit board case 32, have their peripheral edges fixed after the circuit board 30 is housed. This makes it impossible to remove the main body base 32A and the main body cover 32B again. In addition, as a fixing means of the main body base 32A and the main body cover 32B, a strong fixing means such as ultrasonic welding is preferable.

The circuit board case 32 is transparent so that the circuit board 30 accommodated in the circuit board case 32 can be viewed without removing it 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.

A small window 33 is provided on a part of the side surface of the main body cover 32B. When this small window 33 closes the circuit board 30 with the main body base 32A,
It corresponds to a key switch unit (not shown) provided on the circuit board 30. Therefore, even in the closed state, the key operation of the key switch unit can be performed from the small window with the dedicated jig. This key operation is for setting the function of the pachinko machine.

There is no gap in the periphery of the small window 33 due to the correspondence with the key switch unit, and the closed state is maintained. Also, if you do not need the function settings,
The small window 33 does not need to be provided.

A small cover 64 is detachably attached to the opening window 60, and the opening 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, 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 attached (or integrally molded).
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 corresponding to the thick portion 66A on the base side is formed at the distal end of the first comb-shaped notch 66 corresponding to the back 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 66B overlaps on the back side of the mold notch 68 and is located right 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 has a projecting portion 74 with its ceiling part corresponding to the height of the ceiling part of the main body cover 32B.
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 60 slides, and the flat surface of the main body cover 32B. Eliminates continuous openings in the horizontal direction when viewed.

As shown in FIGS. 7 to 9, the small cover 6
The first cylindrical unit 100 that forms a part of the fixing means is integrally formed at an end (hereinafter, referred to as a lower end) of the fourth body base 32A.

The first cylindrical unit 100 is composed of eight cylindrical members 102 and is arranged side by side along the side of the lower end of the small cover 64. These cylindrical members 102
The lower ends of the small covers 64 are connected to each other by main connecting pieces 104. Also, except for between the fourth and fifth counts from one end, the cylindrical members 102 are
06.

As shown in FIG. 10, inside the cylindrical member 102, a screw 110 having a plus groove 108 at the head for fitting with the screw driver 106 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, with the screw 110 housed, 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 has a structure in which the openings of the eight cylindrical members 102 are simultaneously closed.

On the other hand, the small cover 64 is
The first cylindrical unit 100 is positioned coaxially with the cylindrical members 102, that is, on the lower surface of the main body base 32A, in a state where the first cylindrical unit 100 is tightly fitted to the opening window portion 60 of FIG.
A second cylindrical body unit 120, which also forms an engagement member, is integrally formed. In the first embodiment, the periphery of the second cylindrical unit 120 is covered with one large rectangular parallelepiped block 122.
On one surface, eight circular holes 124 are formed along the longitudinal direction. Note that a part of the cylindrical body forming the circular hole 124 projects from the lower surface of the block 122 and is formed in an arc shape 122.
A is formed.

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 female screw 126 is formed on the inner peripheral surface of the circular hole 124.
(See FIG. 10). The opening of the circular hole 124 is a long hole 128 (FIG. 8) that accommodates the eight circular holes 124.
(See below).

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

A plurality of pieces 134 are provided inside the circular hole 132 of the engagement plate 130 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.

Further, 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 accommodated 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 by the engagement between the segment 134 and the ring-shaped groove 114.

When the opening window 60 is closed by the small cover 64, it is fixed by using two of the eight cylindrical members 102 at a time. Here, the small cover 64 is cut off the main connecting piece 104 and the sub-connecting piece 106 of the first cylindrical unit 100 with a nipper or the like so that the fixed portion is left in the second cylindrical unit 120. It is possible to remove it. The main connecting piece 104 and the sub-connecting piece 106 are preferably connected to each other with a predetermined space (1.5 mm or more) so as to facilitate cutting.

In the first embodiment, eight fixing means are provided, and two fixing means are used, so that three times of opening and final fixing can be repeated.

Here, the circuit board 3 accommodated in the circuit board case 32 attached to the pachinko game machine 10 is used.
The ROM 42 on 0 requires periodic inspection. In this case, it is necessary to remove the small cover 64 attached to the main body cover 32B. In such a case, as described above, by removing the fixed portion, the opening window 60 can be opened, and the ROM or the like can be inspected.

As shown in FIGS. 6 and 12, a rectangular small window 138 is provided on the bottom surface of the main body base 32A. A part of the circuit board 30 to be supported is exposed from the small window 138. On a part of the exposed circuit board 30, a part model number serving as a position matching check with the main body base 32A is recorded by a mark such as a machine-readable bar code. A mark 140 for specifying the circuit board 30 is provided on the periphery of the small window 138 so as to be continuous with the mark. Thus, whether or not the circuit board 30 has been replaced can be easily determined visually or by light detection or the like.

The operation of the first 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, an IC chip of a RAM, and the like, all of which are mounted on a single board to form a circuit board 30.

The display portion 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 results of comparison by the CPU 52 match and the state of hitting is reached, 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 includes 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 housed, the peripheral edges of the main body base 32A and the main body cover 32B are subjected to ultrasonic welding. And is stuck.

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

However, the ROM 42 mounted on the circuit board 30 needs to be regularly inspected. Therefore, when inspecting the ROM 42, the main body cover 3
The small cover 64 connected to 2B is removed, and the ROM 42 is taken out from the opening window portion 60 of the circuit board case formed by the small cover 64 for inspection.

After the inspection of the ROM 42 is completed, the opening window 6
0 must be closed, and the small cover 64 is fitted into the opening window 60 again and fixed.

A procedure for repeatedly attaching and detaching the small cover 64 to the opening window 60 will be described below.

First, at the initial stage, that is, at the factory shipping stage, the long groove 72 of the small cover 64 is inserted into the projection 7 of the opening window 60.
4 and accommodate it. The first comb-shaped notch 6 is slid while maintaining this stored state.
6 engages with the second comb-shaped notch 68, and the small cover 64
Is fitted into the opening window 60.

In this state, the first cylindrical unit 66 and the second cylindrical unit 68 face each other, and the eight cylindrical members 1
02 is tightly fitted to and integrated with the ring-shaped projection 136A of the holding plate 136.

Next, the screws 110 accommodated in the first and fifth cylindrical members 102 from the left in FIG. 7 are screwed using the screw driver 106 (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 screwdriver 106 is rotated in this state, the closing lid 1
As a result, the screw driver 106 can reach the screw 110.

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

When the screw 110 is screwed in, the female screw 12 formed in the circular hole 124 of the second cylindrical unit 120 is rotated.
6, the cylindrical member 102 and the block 122 are connected. At the time of this screwing operation, the circular holes 124
134 of the engagement plate 130 provided in the opening of
Elastically deform in the screwing direction. Further, when the tightening is completed, a ring-shaped groove 114 provided in the screw 110 is formed.
The section 134 enters the section. The fixing is completed as described above, and the small cover 64 is fixed at two places with the opening window portion 60 closed.

Here, even if the screw 110 is to be removed, the screw 110 cannot be returned to 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 small cover 64 thus firmly fixed
When removing from the opening window portion 60, as shown in FIG. 9, the main member connected to the cylindrical member 102 used for fixing (that is, the first and fifth cylindrical members 102 for the first time). The connecting piece 104 and the sub-connecting piece 106 are cut off. As a result, the fixed cylindrical member 102 is separated from the small cover 64, and the small cover 64 can be removed by sliding in a direction opposite to the direction at the time of attachment, and the opening window portion 60 can be opened.

When the opening window portion 60 is closed again by the small cover 64 after the inspection and accommodation, it is fixed by using the second and sixth cylindrical members 102 from the left in FIG. Thereafter, when detaching, the main connecting piece 104 and the sub-connecting piece 106 connected to the second and sixth cylindrical members 102 are cut off.

By repeating this, three times of opening,
Four fixings are possible. The main body base 32 constituting the circuit board case 32 in the first embodiment
It has been described that ultrasonic welding is preferable as a means for fixing A to the peripheral edge of the main body cover 32B. However, the present invention is not limited to this method, and other fixing means may be used.

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. For example, the fixing means may be a rivet or an adhesive unless it is broken. Needless to say, any structure that can not be released can be used.

When the small cover 64 is taken out of the opening window 60, the main connection piece 104 and the sub connection piece 106 connected to the cylindrical member 102 are cut off. It is not limited to, for example,
There is no problem in the structure in which the connecting piece of the second cylinder unit 120 is cut off.

In addition to the fixing described above, in the first embodiment,
The following measures are taken to prevent fraud. As shown in FIG. 13, the sliding portion includes the protrusion 74 and the long groove 7.
2 are staggered in a plan view of the main body cover 32B, so that even in this portion, there is no generation of a continuous opening in the vertical direction in the plan view of the main body cover 32B.

Further, as shown in FIG.
When the opening window portion 60 is closed by the above, the opening window portion 60 may be fixed in a state where a slight gap is generated. However, the first and second
Even if there is an unfit portion between the comb-shaped notches 66 and 68, since the thin plate 70 is provided, an opening that is continuous in the vertical direction in the plan view of the main body cover 32B does not occur. Restriction of Ventilation Hole In the first embodiment, the circular hole 62 as the ventilation hole of the main body cover 32B is formed only on the side surface, and its diameter dimension is 2 mm.
Because of the following, it is possible to prevent impropriety before entering a thick wire or tweezers. In addition, 2mm
The following thin wires and the like bend with a small resistance, so that even if they can be inserted, they are useless at all. Furthermore, since the circular hole 62 is provided only on the side surface, even if a wire or the like is inserted from the circular hole 62, the wire does not reach the electronic circuit component in a straight line. Closure of Connector Portion The portion corresponding to the connector portion 44 of the first embodiment (portion along one longitudinal end of the main body cover 32B) is initially closed by the thin-walled molded portion 46. Here, when the position of the connector portion 44 is determined depending on the model, the opening 46A is provided by post-processing. As a result, an unnecessary portion (a portion where the connector portion 44 is attached but not attached) is kept closed by the thin-walled molded portion 46.

In the first embodiment, the circuit board case 32 is described as a transparent case made of synthetic resin. However, the present invention is not limited to this, and an opaque member may be used. However, when an opaque member is used, an abnormality or the like of an electronic component on the circuit board 30 is visually observed while the circuit board 30 is housed in the circuit board case 32.
It is undeniable that the appearance inspection cannot be performed. (Second Embodiment) The following describes a second embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and the description of the components will be omitted.

In the first embodiment, FIG. 6 and FIG.
As shown in FIG. 2, a small window 138 is provided in the main body base 32A to expose a part of the circuit board 30, and the main body base 32A is exposed.
A mark for both positioning and collation of A with the circuit board 30 is added. In the second embodiment, as shown in FIG. 15, a numeral 200 is recorded by a light beam emitted from a laser as shown in FIG. doing. That is,
Utilizing the heat of the light beam, the portions of the main body base 32A and the circuit board 30 which were irradiated with the light beam are depressed,
0 is formed. As these numbers, four to five digits are recorded in the order of manufacture, and in FIG. 15, 0001 is recorded. In addition, for the subsequent products, 0002, 0
003... Are recorded.

In the second embodiment, as shown in FIG. 16, the same numeral 202 is recorded by a laser so as to straddle the main body base 32A and the main body cover 32B. Thereby, the circuit board 30 and the main body base 3
2A, a mark (number) for alignment and collation is recorded on the main body cover 32B. In addition, although the numeral 204 is recorded on the small cover 64 independently, the numeral may be recorded across the small cover 64 and the main body cover 32B.

Since the recording by the laser can record the position, the linear portion, and the curved portion, and can be reproduced later for collation, any one of the members can be replaced by improper replacement to copy the record. At the time of verification, a slight difference can be recognized, which can also help prevent unauthorized use. In the case of recording using a laser, by recording a finer image or the like, it is possible to obtain an effect more than that of a sealing seal.

It is to be noted that other thermal processing means such as ultrasonic waves may be used as long as the mark is formed by thermal processing, not limited to laser.

Further, in the second embodiment, the laser mark is recorded so as to straddle two members. However, when only the collation is performed, the laser mark may be recorded for each member. .

As shown in FIG. 17, the main body cover 32B
A rectangular seal 206 on which the same number as that of the laser mark is recorded is attached to the outside of the ceiling surface.
The sticking position of the seal 206 is affixed to the substantially L-shaped guide projection 208 protruding outside the ceiling surface of the main body cover 32b. Thereby, the seal 20
6 can be stuck to a substantially fixed position.

Note that the guide projection 208 can function as a means for determining a reading start position when it is necessary to read information written on the sticker 206 by a sensor or the like. That is, when scanning and reading the sticking portion of the sticker 206 using the reflection type light amount sensor, the reflection density of the guide projection 208 becomes higher than that of other portions, and a so-called pulse waveform can be obtained. Using the output as a trigger (start position signal), seal 2
06 can be taken as an image.

The number recorded on the sticker 206 is recorded in the upper column of the sticker 206, and the lower column is a history recording area 210. This history recording area 210
In the lower part, the characters "opened person" and "opened date" are recorded, and blank items below them are shown. There are three lines of blank space in the blanks, each of which is indicated by the character.

Such a seal 206 is used for the small cover 64.
Each time the file is opened, the file is recorded and stamped by the person who opened it.

Here, heretofore, the area for leaving the history has been provided on a sealing seal for sealing the main body base and the main body cover. In this case, since the sealing seal is attached so as to straddle the main body base and the main body cover, the sticking position is limited, and the sealing seal is attached to a surface having irregularities. That is, the visibility cannot be emphasized. However, the circuit board case 32 of the present invention
Since the main body base 32A and the main body cover 32B are completely fixed, there is no need to provide a seal that straddles both the main body base 32A and the main body cover 32B, and only the history needs to be considered. It is possible to attach the seal 206 to the.

The seal 206 is not limited to the outer side of the ceiling surface but may be the side surface of the main body cover 32B.

As shown in FIG. 17, the main body cover 32B
A mark 212 indicating the date of manufacture is provided on the inner side of the ceiling surface. Since the engraving 212 is engraved inside the ceiling surface of the main body cover 32B (see FIG. 18), the flatness of the outer surface is maintained and the main body cover 32B is transparent.
External recognition is possible.

The stamp 212 is represented by unevenness by providing a stamp member in a molding die in advance.

Here, the method of expressing the date of manufacture of the inscription 212 is such that a predetermined circle is formed for each year, month and day, and graduations are engraved on the circumference at a predetermined pitch.

The circular mark 214 indicating the year of manufacture is engraved with four-division scales.
, '98, '99, '00, for example, '97
Means 1997.

Next, a circular stamp 216 indicating the month of manufacture has:
Twelve divisions are engraved, and numbers 1 to 12 are engraved in the vicinity of each division. For example, 8
Means August.

Finally, a circular mark 218 indicating the date of manufacture has a scale of 31 divisions engraved thereon, and the numbers 5, 10, 15, 20, 25, 30 are engraved near the scale of every five scales. I have. For example, the position where the scale of 15 is shifted to the scale of 20 for 3 scales means 18 days.

Such circular inscriptions 214, 216,
Reference numeral 218 has a function as an information expressing unit, and is inscribed on all the main body covers 32B. The memory is not limited to the circular stamps 214, 216, and 218, and may be a straight line.

On the other hand, each circular inscription 214, 216, 21
8, a diameter arrow 220 is engraved. The arrow 220 can uniquely indicate each scale, and can freely rotate 360 ° on the molding die. Therefore, by generating the arrow with the arrow pointing toward the number corresponding to the date of manufacture, it is possible to express the date of manufacture by a combination of numbers indicated by each arrow. The arrow 220 has a function as an indicator. When the memory is a straight line, the arrow 220 may be moved along the straight line.

In the above description, the manufacturing date has been described as an example of the engraving.
(Refer to FIG. 17) may also be provided together with the stamp of the date of manufacture in order to prevent unauthorized replacement.

FIG. 16 shows a modification of the engraving of the date of manufacture. The above-mentioned date of manufacture can be engraved with a detailed date, but the direction of the arrow must be changed every day. In contrast, FIG.
6 are three (year, month,
Day) circular inscriptions 224, 226, 228 are provided,
The inside is divided into four parts. According to a predetermined rule, a point 23 is included in the four divided areas.
0 is engraved.

The outline of the date of manufacture can be known from the number of points 230 and the area engraved. For example, a point 230 is engraved in the upper right area of the circular stamp 224 (left side in FIG. 16) for year representation, and the circular stamp 226 for month representation.
In the case where the point 230 is engraved in the lower right area of the center (FIG. 16) and the point 230 is engraved in the lower left area of the circular mark 228 for expressing the date (the right side of FIG. 16), 1997
It shows that it was manufactured between April 17 and April 24 of June. That is, the approximate date of manufacture can be recognized.

Such a simple engraving is effective when the area for engraving is small.
Applies to the date of manufacture. Also, the stamps 224, 2
Preferably, 26, 228 and point 230 are also carved inside small cover 64. (Third Embodiment) The following describes a third embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and the description of the components will be omitted.

In the first embodiment, as shown in FIG. 3, the circuit board case 32 (the body cover 32B initially has a portion corresponding to the connector portion 44 closed and a thin molded portion 46 at the beginning of molding. .

On the other hand, in the third embodiment, as shown in FIG. 17, a connector 44 is provided with a common connector 44A (for example, a connector for taking in power) common to all models. They are classified into non-common connector sections 44B that may or may not exist for each model.

The common connector portion 44A is literally common, but in the first embodiment, the thin-walled molded portion 46 must be opened by post-processing. Therefore, in the third embodiment, the region of the main body cover 32B corresponding to the common connector portion 44A is previously opened in the molding stage (opening 232). As a result, post-processing becomes unnecessary, and post-processing is performed only on the portion corresponding to the non-common connector portion 44B, so that workability is improved.

Further, similarly to the first embodiment, the closedness of the circuit board 30 can be maintained.
34 etc. can be protected.

In the above description, the non-common connector portion 44B
Although the area corresponding to is formed as the thin-walled molded section 46, a continuous rectangular band-shaped area including the non-common connector section 44B may be used as the thin-walled molded section.

Further, in the above description, the thin-walled molded portion 46 is provided so that a necessary portion can be freely opened at the time of assembling. Necessary portions may be opened. For example, a member for providing an opening in a molding die is made detachable, and this member is attached to a position required for each molding, or an opening 232 is provided by cutting after molding, and the opening 232 is provided. By making the blade detachable, the opening 23 can be placed only in a necessary position in advance.
2 can be provided.

[0144]

As described above, according to the first to third aspects of the present invention, it is possible to prevent unauthorized replacement of a ROM and to make an opening formed at the time of inspection of a ROM a plurality of times.
It has an excellent effect of being able to close tightly. Further, in addition to the above effects, even if the main body cover or the like is illegally opened, there is an effect that the possibility of fraud can be quickly recognized by leaving a trace of this opening.

According to a fourth aspect of the present invention, in the fixing means of the third aspect, a screw, a ring-shaped groove provided in the screw, and a thin metal plate fitted into the groove are used. Thereby, the fixing means can be realized with a simple structure. Further, it is possible to easily confirm visually before and after tightening the screw.

In the invention according to claims 6 to 8,
By printing and writing the same identification code on all components in a non-erasable state, even if a member is replaced due to unauthorized use, it can be quickly recognized due to mismatch of the identification code. Can be.

Further, the irregularities are processed by laser or ultrasonic waves to make the identification code difficult to reproduce, so that copying and the like can be prevented. Furthermore, the relative positional relationship between two or more members straddling is established, and it is possible to leave a trace of improper disassembly and reassembly.

According to the ninth to eleventh aspects of the present invention, by eliminating unnecessary openings, it is possible to mold the printed wiring of the circuit board so as not to be exposed as much as possible. Has been reduced. In addition, it is easier to form a continuous rectangular area including the disposition position of the non-common connector, and it is possible to flexibly cope with future design changes and the like.

According to the twelfth aspect of the present invention, it is only necessary to consider only the history without considering the sealing as a function, and the sticker can be attached with priority given to visibility. Further, in the case of the history, since there is a possibility of being stamped, the upper surface or the side surface of the main body cover having the flatness, for example, is optimal.

In the inventions according to the thirteenth and fourteenth aspects, the information expressing portion may have the same shape, and only the index direction of the index portion needs to be changed. . In addition, the mark is given a position where priority is given to visibility, and by marking on the back side, the contents of the mark can be recognized because the body cover, the body base and the small cover are transparent, and it is impossible to change the mark. State.

[Brief description of the drawings]

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

FIG. 3 is a rear view of the pachinko game machine according to the first 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 showing the appearance of the circuit board case according to the first 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 first 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 cross-sectional view showing a procedure for fixing the fixing means according to the first embodiment.

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

FIG. 12 is a plan view of a small window according to the first embodiment.

FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 9;

FIG. 14 is a sectional view taken along line XIV-XIV of FIG. 5;

FIG. 15 is a bottom view of the circuit board case according to the second embodiment.

FIG. 16 is a side view of the circuit board case according to the second embodiment, on the small cover arrangement side.

FIG. 17 is a top view of the circuit board case according to the second and third embodiments.

18 is a sectional view taken along line XVIII-XVIII in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pachinko game machine 32 Circuit board case 32A Main body base 32B Main body cover 42 ROM 60 Open window 64 Small cover 66 First comb-shaped notch 68 Second comb-shaped notch 70 Thin plate 72 Long groove 74 Projection 100 First Cylindrical unit (cylindrical member) (first cylindrical body) 110 screw (engaging member) 114 groove 120 second cylindrical unit 130 engaging plate (one-way limiting member) 134 section 200, 202, 204 Numeral (mark) ) 206 seal 208 guide protrusion 212 engraved

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takashi Mori 2-3014-8 Hirosawa-cho, Kiryu-shi, Gunma 8 Heiwanai Co., Ltd. (72) Inventor Satoshi Nakamura 2-3014-8 Hirosawa-cho, Kiryu-shi, Gunma Heiwanai Co., Ltd.

Claims (14)

[Claims] 1. A circuit board case mounted on a game machine for protecting a circuit board provided with a plurality of electronic components for electronically controlling the contents of a game, wherein the main body base supports the circuit board and the circuit board includes A main body, which is fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface by the main body base with a predetermined space, protects the circuit board, and partially has an opening window. A casing configured by a cover, a small cover for closing the opening window portion, a fixing means provided between the small cover and the main body base or the main body cover, and fixing the small cover in a closed state,
A circuit board case, comprising: a plurality of fixing positions provided by the fixing means; and removing the fixing portions each time the small cover is removed, and re-fixing the fixing portions sequentially at new fixing positions. 2. A protruding portion is provided on one of a peripheral edge of the opening window portion and an outer periphery of the small cover, and a long groove portion for accommodating the protruding portion is provided on the other of the peripheral edge of the opening window portion and the outer periphery of the small cover, 2. The circuit board case according to claim 1, wherein the small cover is attached to and detached from the opening window by sliding the protrusion in the long groove. 3. The small cover is attached to one of the small cover and the casing, and a first cylindrical body in which an engagement member is housed, and the fixing means is attached to the other of the small cover or the casing, At the time of closing the opening window portion of the cover, it is coaxial with the first cylindrical body, and accepts engagement by entry of the engagement member,
A second cylindrical body in which a one-way restricting member for preventing disengagement due to withdrawal is accommodated; and a plurality of fixing means each including a unit of the first cylindrical body and the second cylindrical body. The circuit board case according to claim 1 or 2, wherein the circuit board case can be cut off independently. 4. The engaging member is a screw in which a male screw is formed and a ring-shaped groove having a reduced diameter is formed in a base of the male screw portion, and the one-way restricting member is formed of a thin metal plate. A hole through which the screw passes is provided coaxially with the first cylindrical body, and an intermittent tongue piece is formed from the periphery of the hole toward the axis and inclined in the direction of tightening by the screw. When the screw is screwed together, the tongue is elastically deformed to allow the screw to move in the tightening direction, and when the screwing is completed, the elastic deformation of the tongue is released and accommodated in the ring-shaped groove. 4. The circuit board case according to claim 3, wherein the screw is prevented from coming off. 5. The circuit board according to claim 4, wherein when the screw is housed in the first cylindrical body, a lid which is relatively easily damaged is attached to the opening for housing. Case. 6. A circuit board case attached to a game machine for protecting a circuit board provided with a plurality of electronic components for electronically controlling the contents of a game, wherein the main body base supports the circuit board and the circuit board includes A main body, which is fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface by the main body base with a predetermined space, protects the circuit board, and partially has an opening window. A casing configured by a cover, a small cover for closing the opening window portion, a fixing means provided between the small cover and the main body base or the main body cover, and fixing the small cover in a closed state,
A circuit, wherein at least two or more of the integrated circuit board, the main body base, the main body cover, and the small cover are marked with the same identification code by non-erasable printing means. Board case. 7. The non-erasable printing means is thermal processing including laser and ultrasonic waves, and the identification code is expressed by unevenness due to the thermal processing.
The described circuit board case. 8. The system according to claim 6, wherein the identification code is written over at least two of an integrated circuit board, a main body base, a main body cover, and a small cover. The described circuit board case. 9. A circuit board case attached to a game machine for protecting a circuit board provided with a plurality of electronic components for electronically controlling the contents of a game, wherein the main body base supports the circuit board and the circuit board includes A main body, which is fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface by the main body base with a predetermined space, protects the circuit board, and partially has an opening window. A casing configured by a cover, a small cover for closing the opening window, a fixing means provided between the small cover and the main body base or the main body cover, and fixing the small cover in a closed state; A plurality of connectors provided on the circuit board and connectable to a harness for transmitting signals to and from the outside, the plurality of connectors corresponding to the connectors in advance in a molding step on the body cover Circuit board case and forming a passage hole in the location. 10. A circuit board case attached to a game machine for protecting a circuit board provided with a plurality of electronic components for electronically controlling the contents of a game, wherein the main body base supports the circuit board and the circuit board has A main body, which is fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface by the main body base with a predetermined space, protects the circuit board, and partially has an opening window. A casing configured by a cover, a small cover for closing the opening window, a fixing means provided between the small cover and the main body base or the main body cover, and fixing the small cover in a closed state; A plurality of connectors provided on the circuit board and connectable to a harness for transmitting a signal to and from the outside; and a common position among different models among the plurality of connectors. In the case of a common connector provided, a passage hole for the common connector is previously formed in the main body cover corresponding to the arrangement area of the common connector in a molding step, so that a non-common position is provided between different models. In the case of the non-common connector disposed in the main body cover, a thinner portion is formed in the main body cover corresponding to at least all the regions where the non-common connector can be disposed as compared with other regions. Circuit board case. 11. The circuit board case according to claim 10, wherein the thin portion is a continuous rectangular area including a position where the non-common connector is provided. 12. A circuit board case attached to a game machine for protecting a circuit board provided with a plurality of electronic components for electronically controlling the contents of a game, wherein the main body base supports the circuit board and the circuit board includes A main body, which is fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface by the main body base with a predetermined space, protects the circuit board, and partially has an opening window. A casing configured by a cover, a small cover for closing the opening window, a fixing means provided between the small cover and the main body base or the main body cover, and fixing the small cover in a closed state; A circuit board case having a seal attached to a position where priority is given to planarity and visibility of the circuit board case in an assembled state by fixing means. 13. A circuit board case attached to an amusement machine and protecting a circuit board having a plurality of electronic components for electronically controlling the contents of a game, the circuit board case comprising: a main body base supporting the circuit board; A main body, which is fixed to the main body base in a non-removable state so as to cover a surface opposite to the support surface by the main body base with a predetermined space, protects the circuit board, and partially has an opening window. A casing configured by a cover, a small cover for closing the opening window, a fixing means provided between the small cover and the main body base or the main body cover, and fixing the small cover in a closed state; An information expression part which is provided to at least one of the main body base, the main body cover and the small cover and in which all necessary information is expressed in advance, and necessary information from the information expression part A circuit board case having a an information representing unit having an indicator portion that indicates. 14. The information expression in the main body base, the main body cover, and the small cover is at least transparent, and the information expression part is an engraved mark expressed by irregularities. The date of manufacture is stamped at a predetermined position in advance, and the indicator unit indicates the corresponding date of manufacture, and that the stamp is stamped on the position giving priority to visibility, and on the back side. The circuit board case according to claim 13, wherein: