JPH0798100B2 - Box for control circuit board of pachinko machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control circuit board box for housing a control circuit board for controlling a game in a pachinko machine.

[Prior Art] In recent years, in a pachinko machine, a game machine that excites amusement by controlling a prize device and a display device provided on a game board in a complicated manner has become mainstream. Such control can be performed by IC, LSI
A logic control circuit board on which a large number of electronic components such as the above are arranged, or a control circuit board including a microcomputer has been used. Then, these control circuit boards are housed in a prize ball collecting cover arranged on the back surface of the game board or a control circuit board box attached to a mechanism plate and attached to a pachinko machine. A control circuit board box made of metal having a shielding effect is used because the control circuit board housed inside is vulnerable to electrical noise and is likely to malfunction.

[Problems to be Solved by the Invention] By the way, the above-mentioned metal control circuit board box has a certain amount of static electricity, magnetism, or radio waves (electromagnetic waves).
However, it has been found that the shielding effect is not sufficient for radio waves generated from a radio device used at a relatively high frequency which has been particularly popular in recent years. For this reason, there has been a problem that the control circuit malfunctions due to the radio wave generated from the vicinity of the game arcade or the radio wave intentionally generated by the radio device brought by the player.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a control circuit board box for a pachinko machine having a sufficient shield effect against electric noise including electromagnetic waves. .

[Means for Solving the Problems] In order to achieve the above-mentioned object, the control circuit board box according to the present invention has a surface of the control circuit board box made of a conductive powder and a non-combustible inorganic binder. It is constructed by coating with a nonflammable shield material made into paint.

[Operation] The surface of the control circuit board box is covered with a non-combustible shield material that is made by coating conductive powder with high shielding effect (for example, copper powder) with a non-combustible inorganic binder (for example, water glass). With this configuration, the influence of external electrical noise including electromagnetic waves can be blocked, and normal operation of the control circuit board can be ensured.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. First, the configuration of a pachinko machine to which the control circuit board box according to this embodiment is applied will be described with reference to FIGS. 3 and 4. In the figure, a metal frame 3, a glass door frame 4 having glass, a front plate 5 and the like are attached to the front frame 2 of the pachinko machine 1, and a game board 6 is detachably attached to the back surface of the front frame 2. ing.

On the game board 6, a guide rail 8 that guides a hit ball and partitions and forms a game area 7 is planted in a substantially circular shape.
Near the center of the game area 7, a plurality of digital displays 9a-
A variable display device 10 having 9c is provided. This variable display device 10 is a starting winning opening 11a-1 provided in the game board 6.
Digital display 9a-9c by hitting a ball in 1c
The variable display is started, and the variable state is stopped by the player pressing a stop switch 12 provided on an upper portion of a lower plate 20a described later or after a certain time. A variable winning device 13 is attached below the game area 7. The variable winning device 13 is provided with an opening / closing plate 14 which is opened / closed by a solenoid which is an electric drive source, and the opening / closing plate 14 is opened / closed by a combination of the variable display device 10 under predetermined conditions. It has become so. Specifically, the digital display
When all of 9a-9c displays "7", it is a big hit, and the opening / closing plate 14 has passed for 30 seconds, or 10
V is formed in the opening / closing plate 14 by opening it until individual winning balls are generated, and winning the opening / closing plate 14 during the opening.
When you win the prize (not shown)
14 is open for 30 seconds or until 10 winning balls are generated, and such an operation is the best as long as the winning balls are won in the V winning opening.
It can be repeated up to 10 times. Also, on both sides of the variable winning device 13, side winning holes 15a,
15b is formed. The side winning openings 15a and 15b are the winning openings located at the bottom of the game area 7. Furthermore,
The gaming area 7 is provided with winwheel lamp-equipped winning openings 16a, 16b, jackpot lamps 17a, 17b, and an outlet 18, etc., respectively. This windmill lamp 16a, 16b and jackpot lamp 17
The a and 17b are turned on or blinked when the jackpot state is reached or during the period during which the digital displays 9a to 9c are variably displayed, to make the game interesting.

Therefore, the various winning devices and display devices described above are controlled by the control circuit board 50 housed in the control circuit board box 30 described later.

On the surface of the front plate 5, there is fixed an upper plate 19 for storing the dispensed prize balls and supplying the hitting ball to the launch position.
On the front surface of the front frame 2 below the upper plate 19, an operation handle 20 for adjusting the resilience of a hit ball and a lower plate 20a for storing prize balls that cannot be stored in the upper plate 19 are attached.

Next, the back structure of the pachinko machine will be described with reference to FIG. In the figure, a mechanism plate 21 made of synthetic resin is provided so as to be openable and closable so as to cover the entire back surface of the game board 6. The mechanism plate 21 has a winning ball processing mechanism 22 that receives the winning balls from the winning opening and processes the winning balls one by one, and a prize ball tank 23 that stores prize balls supplied from a supply mechanism (not shown).
And a prize ball discharging device 24 that operates in association with the winning ball processing mechanism 22 and receives and discharges a predetermined number (for example, 13) of prize balls from the prize ball tank 23. Further, an opening 25 is opened in the central portion of the mechanism plate 21, and a synthetic resin winning ball collecting cover 26 directly attached to the back surface of the game board 6 faces the opening 25, and the winning ball collecting cover 26. A control circuit board box 30 made of synthetic resin, which is an essential part of this embodiment, is fixed to the back surface of the box 30, and the box 30 projects rearward from the opening 25. Since the winning ball collecting cover 26 is formed of a thin plate so as to have a space for dropping the winning balls on its front surface, the winning ball collecting cover 26 is not so strong in terms of strength.

A control circuit board 50, which will be described in detail later, is housed in the control circuit board box 30. The control circuit board 50 controls the operations of the digital display devices 9a to 9c and the opening / closing plate 14 of the variable winning device 13. . In the case of the control shown in the figure, the digital display units 9a to 9c start to fluctuate in response to the detection signal by the start winning port 11a to 11c, and the digital display units 9a to 9c are sequentially stopped after a predetermined time has elapsed. Let Then, it is determined whether or not the combination of display modes at the time of stop is a predetermined combination. Then, the control circuit board 50, when it is determined that the display mode of the digital display 9a ~ 9c is a big hit state, the opening and closing plate 14 of the variable winning device 13 for a fixed time (for example, 30.
Second) or a predetermined number (for example, 10) of winning balls are controlled to remain open. In addition, the control circuit board 50
Is a jackpot or a digital display
While 9a to 9c are changing, the lamps of the winning port with windmill lamps 16a and 16b and the jackpot lamps 17a and 17b are turned on or blinked.

Further, on the back surface of the pachinko machine 1, a sound effect is further generated when the hitting ball launching mechanism 27 for projecting a hitting ball, the above-described big hit state, or when the hitting ball passes through the starting winning holes 11a to 11c. A speaker 28 is provided. The speaker 28 is also controlled by the control circuit board 50.

Next, the control circuit board box, which is the main part of this embodiment
The configuration of 30 will be described with reference to FIGS. 1 and 2. In the figure, the control circuit board box 30 is entirely molded in a box shape from synthetic resin as described above, and is composed of three members. That is, a rectangular fixed plate 31 fixed to the back surface of the winning ball collecting cover 26, a cover 32 covering almost the entire surface of the fixed plate 31, and a terminal connection opening 40 formed below the cover 32. And a wiring lead-out cover 33 that covers the.

An engaging convex wall 34 is provided around the outer periphery of the fixed plate 31, and a covering cover 32 is fitted along the outer periphery of the engaging convex wall 34 to align the fixing plate 31 and the covering cover 32. ing. Further, board mounting bosses 35a to 35d for locking the control circuit board 50 are provided at four corners inside the engagement convex wall 34 so as to project therefrom.
Mounting holes 51a formed in the four corners of the control circuit board 50 on the 35a to 35d
After matching 51d to 51d, the control circuit board 50 is fixed to the fixing plate 31 by fixing with screws (not shown). Further, cover cover mounting bosses 36a, 36b for fixing the cover 32 are provided projecting below both ends inside the engagement convex wall 34. Further, the fixing plate 31 is provided at the four outer corners of the engaging convex wall 34.
Mounting portions 37a to 37d for fixing the above-mentioned winning ball collecting cover 26 with screws are formed.

On both sides of the upper end of the cover 32, the mounting portions 37a, 37c
Mounting portions 38a, 38b corresponding to the above are formed, and with the covering cover 32 aligned with the fixing plate 31, a screw (not shown) is attached.
The upper part of the control circuit board box 30 is fixed to the back surface of the winning ball collecting cover 26 by penetrating through 37a, 38a and 37c, 38b. In addition, a large number of heat dissipation holes 39 are formed in the upper rear surface of the cover 32, and the control circuit board is fixed inside.
It is designed to release the heat generated by 50. Furthermore,
Below the cover 32, a terminal connection opening 40 is formed,
The connection terminal 52 of the control circuit board 50 is located at a position corresponding to the terminal connection opening 40. As a result, it is possible to connect the connection line from the winning device or the display device provided on the game board 6 to the connection terminal 52 while the control circuit board box 30 is fixed to the back surface of the winning ball collecting cover 26. Further, at a position below the terminal connection opening 40, mounting holes 41a and 41b for mounting the lower part of the covering cover 32 to the fixing plate 31 with screws are formed at both ends thereof, and the wiring drawing cover 33 is fixed to the center thereof. A mounting portion 42 for forming is formed.

The wiring drawer cover 33 is provided to cover the terminal connection opening 40 after connecting the connection line from the winning device or the display device provided on the game board 6 to the connection terminal 52,
An engagement piece 43 that engages with the upper edge of the terminal connection opening 40 is provided on the upper part thereof so as to project, and a fastening hole 44 is formed on the lower part of the center thereof. The fastening hole 44 is provided corresponding to the mounting portion 42, and the wiring drawer cover 33 is fastened and fixed to the covering cover 32 by screwing a long screw 48. . Also, on the upper surface of the wiring drawer cover 33,
A large number of heat radiating ports 45 are formed to escape the heat generated inside or to send in fresh air outside like the above-mentioned heat radiating ports 39. Further, on both side surfaces of the wiring drawing bar 33, the connection terminals 52
Wire drawing opening to draw the wire connected to the outside
46a and 46b are open.

In the control circuit board box 30 configured as described above, each member, that is, the fixing plate 31, the covering cover 32, and the inner surface of the wiring lead-out cover 33, copper powder is a conductive powder. A nonflammable shield material 47, which is made into a paint by water glass which is a nonflammable inorganic binder, is applied. This shield material 47 is made by coating conductive copper powder with water glass, which is a non-combustible inorganic binder, and is applied to the inner surface. The thickness of the coating film is arbitrary. It may be formed, but the thicker it is, the better the electromagnetic wave is reflected or absorbed, so that the shield effect is enhanced. According to the experiment, the shielding effect of the shield material 47 is 40 to 50 decibels, and it has an effect of attenuating the generated electromagnetic waves to 10,000 to 100,000. That is, since the control circuit board 50 is surrounded by the shield material 47 having good conductivity, the control circuit board 50 is electrically shielded. Therefore, it is possible to prevent intrusion of electrical noise including an electromagnetic wave generated outside and prevent malfunction of the control circuit board 50. It is also possible to prevent the control circuit board box 30 itself from being charged with static electricity. Since the shield material 47 is made of paint, it can be easily and easily applied to the surface of each component constituting the control circuit board box 30.

As described above, in this embodiment, since the surface of the control circuit board box 30 is covered with the non-combustible shield material 47, the intrusion of electrical noise including electromagnetic waves generated outside is prevented. A malfunction of the control circuit board 50 can be eliminated. Further, in the case of this embodiment, since the control circuit board box 30 is made of synthetic resin, the weight thereof can be made extremely light, and the control circuit board 50 can be formed inside.
Even if it is stored, it is much lighter than the one stored in a metal board box as a whole, so even if it is fixed to the back surface of the winning ball collective cover 26 formed of synthetic resin, the prize will be won. It is possible to reduce the load on the ball collection cover 26, prevent the prize ball collection cover 26 from being deformed or damaged, and thus adversely affect the flow-down state of the prize balls flowing inside the prize ball collection cover 26. Never. Further, since the control circuit board box 30 is molded from synthetic resin, the manufacturing cost and workability are excellent.

In the above-mentioned embodiment, the shield material 47 is shown as a box directly coated with a synthetic resin, but the shield material 47 is applied to paper or a non-woven fabric, and the paper or the non-woven fabric is adhered to the box. It may be coated. Further, the control circuit board box 30 may be made of metal (iron plate or the like).

Further, in the above-described embodiment, the shield material 47 is the fixing plate 31 that constitutes the control circuit board box 30, and the covering cover.
Although only the inner surface of the wiring 32 and the wiring lead-out cover 33 is shown, the shielding effect can be sufficiently satisfied even if only the inner surface is covered, and the control circuit board box can be provided. This is because consideration has been given so as not to impair the external appearance of 30, and the shielding material 47 may cover not only the inner surface but also the entire surface of each component. Furthermore, even if only the cover 32 is covered with the shield material 47, it has a shield effect against noise from the outside. Further, the control circuit board box 30 may be fixed to the back surface of the mechanism plate 21 formed of synthetic resin, instead of the back surface of the winning ball collecting cover 26. Furthermore, by applying the shield material 47 according to the embodiment to the surfaces of the winning ball collecting cover 26 and the mechanism plate 21, the shielding effect of the entire pachinko machine 1 can be enhanced.

Furthermore, the shield effect can be further enhanced by connecting the control circuit board box 30 to the ground wire.

Although the control circuit board 50 is housed in the specially formed control circuit board box 30 in the above-described embodiment, the control circuit board box 30 is further housed in the mechanism plate 21.
It may be housed in a cover member made of metal or synthetic resin attached to the. In this case, since the cover member has a function as the second control circuit board box, the shield material 47 may be applied to the surface of the cover member.

[Effects of the Invention] As is clear from the above description, the control circuit board box according to the present invention has the surface of the control circuit board box
Since it is composed of a non-combustible shield material made by coating a conductive powder with a high shielding effect (for example, copper powder) with a non-combustible inorganic binder (for example, water glass), it can be used from outside including electromagnetic waves. It is possible to secure the normal operation of the control circuit board by cutting off the influence of the electrical noise.

[Brief description of drawings]

FIG. 1 is a sectional view of a control circuit board box according to an embodiment, and FIG. 2 is an exploded perspective view of the control circuit board box.
FIG. 3 is a front view of a pachinko machine equipped with a control circuit board box, and FIG. 4 is a schematic rear view of the pachinko machine. 1 …… Pachinko machine 30 …… Control circuit board box 47 …… Shield material 50 …… Control circuit board

Claims (1)

[Claims] 1. A control circuit board box containing a control circuit board for controlling a game in a pachinko machine, wherein the surface of the control circuit board box is made by coating conductive powder with an incombustible inorganic binder. A control circuit board box for a pachinko machine, which is covered with a nonflammable shield material.