JPH0751167B2 - 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. Then, initially, a molded control resin board was used as the control circuit board box, but the control circuit board housed inside is vulnerable to electrical noise, and as a result, malfunctions are likely to occur. Shielding metal control circuit board boxes have come into use.

[Problems to be Solved by the Invention] By the way, as described above, the control circuit board box is attached to the winning ball collection cover or the mechanism plate arranged on the back surface of the game board with screws or the like. Since the cover and mechanism plate are made of synthetic resin, the strength is weak,
When a heavy object is attached, there is a problem that they may be deformed or damaged and adversely affect the flow of the winning ball. On the other hand, recent control circuit boards have become larger and heavier as their game contents have become more complex, so if you store them in a heavier metal control circuit board box, As a whole, a considerably heavy object is attached to the back surface of the winning ball collecting cover or the back surface of the mechanism plate, and the above-mentioned problems have become apparent. Further, the metal control circuit board box has a problem in that, when it is handled, it hits another pachinko machine or device to damage or damage other parts at the corners of the box.

The present invention has been made in view of the above problems, and an object of the present invention is to configure a control circuit board box for housing a control circuit board as light as possible and sufficient for electrical noise. A box for a control circuit board of a pachinko machine having a shield effect is provided.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the control circuit board box according to the present invention is molded of synthetic resin, and
Its surface is coated with a thin film of zinc spray.

[Operation] Since a zinc thin film having a high shielding effect is formed on the surface of the control circuit board box, it is less likely to be affected by external electrical noise like the metal control circuit board box, and the control circuit board is less likely to be affected. The normal operation of can be secured.

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 rear 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 them 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, the rectangular fixing plate 31 fixed to the winning ball collecting cover 26, and the covering cover 32 covering almost the entire surface of the fixing plate 31.
And a terminal connection opening 40 formed below the covering 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 to the 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 winning ball collecting cover 26 by penetrating through 37a, 38a and 37c, 38b. In addition, a large number of heat dissipation holes are
A hole 39 is provided to release heat generated from the control circuit board 50 fixed inside. Furthermore, a terminal connection opening 40 is formed below the cover 32, and 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 winning ball collecting cover 26. Also,
At the position below the terminal connection opening 40, cover the both ends.
Mounting holes for attaching the lower part of 32 to the fixing plate 31 with screws 41
A and 41b are formed, and a mounting portion 42 for fixing the wiring drawing cover 33 is formed in the center thereof.

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. In addition, on both sides of the wiring drawer cover 33, connect terminals
Wiring lead-out openings 46a and 46b are formed to lead the wiring connected to 52 to the outside.

In the control circuit board box 30 configured as described above, zinc thin films are formed on the inner surfaces of the respective members, that is, the fixing plate 31, the covering cover 32, and the wiring drawing cover 33.
47 are coated. This zinc thin film 47 is a low temperature thermal spray coating (20 ° C to 30 ° C) of a molten zinc alloy (99.9% or more by weight of zinc).
℃), the thickness of the thin film is 35 ~ 10
Formed to 0 micron. The zinc thin film 47 formed in this way is uniform and has high tightness, so that it has good electrical conductivity and an extremely high shielding effect. In other words, the control circuit board 50 is surrounded by the zinc thin film 47 having good conductivity, so that the control circuit board 50 is electrically shielded. For this reason, it is possible to prevent intrusion of electrical noise 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.

As described above, in this embodiment, the zinc resin thin film 47 is formed on the surface of the synthetic resin control circuit board box 30.
Since it is covered with, the weight can be made extremely light, and even if the control circuit board 50 is housed inside, it is significantly lighter than the one housed in a metal board box as a whole. Therefore, even if it is fixed to the back surface of the winning ball collective cover 26 made of synthetic resin, the winning ball collective cover 26
It is possible to reduce the load applied to 26 and prevent the prize ball collecting cover 26 from being deformed or damaged, so that the flowing state of the prize balls flowing inside the prize ball collecting cover 26 is not adversely affected. . In addition, the control circuit board box 30
Since it is molded with a synthetic resin, its manufacturing cost and workability are excellent. Furthermore, since the zinc thin film 47 is formed by low temperature spraying, the thin film is coated in a uniform state, and the workability is also good. In addition, during handling, other pachinko machines, devices, etc. will not be damaged or scratched by the corners of the control circuit board box 30. In the above-mentioned embodiment,
Although the zinc thin film 47 is directly coated on the synthetic resin box, the zinc thin film 47 may be sprayed on a paper, a non-woven fabric or the like, and the paper or the non-woven fabric may be adhered to the box for coating.

Further, in the above-described embodiment, the zinc thin film 47 is the fixing plate 31 and the covering cover 3 which constitute the control circuit board box 30.
2 and the wiring lead-out cover 33 is shown only on the inner surface, but it is possible to sufficiently satisfy the shielding effect even if only the inner surface is covered, and the control circuit board box is provided. This is because consideration is given so as not to impair the outer appearance of 30, and the zinc thin film 47 may be coated not only on the inner surface but on the entire surface of each component. Further, even if only the cover 32 is covered with the zinc thin film 47, it has a shielding effect against noise from the outside. Also, the control circuit board box 30 is not on the back surface of the winning ball collective cover 26,
It may be fixed to the back surface of the mechanism plate 21 formed of synthetic resin.

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

[Effects of the Invention] As is clear from the above description, the control circuit board box according to the present invention is molded from synthetic resin, and
Since the surface is coated with a thin film by zinc spraying, it is possible to reliably prevent electrical noise from the outside by the zinc thin film, and it is possible to form the weight extremely lightly and Even if the control circuit board is housed, it is much lighter than the one housed in a metal board box as a whole, so the winning ball set cover made of synthetic resin or the back of the mechanism board Even if fixed, the load on the winning ball collective cover or the mechanism plate can be reduced, and the deformation or damage of the winning ball collective cover or the mechanism plate can be prevented, so that the winning ball collective cover, or There is no adverse effect on the flowing state of the winning balls flowing down inside the mechanism plate.

[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
...... Zinc thin film, 50 ...... Control circuit board

Claims (1)

[Claims] 1. A control circuit board box for housing a control circuit board for controlling a game in a pachinko machine, wherein the control circuit board box is molded of synthetic resin and has a surface coated with a zinc sprayed thin film. This is a box for control circuit boards of pachinko machines.