JPH09220333A - Circuit board case of pinball game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit board case of a pachinko game machine which can satisfactorily exhibit a function of preventing an unfair practice such as remodeling of a circuit board. SOLUTION: A boss 14 is provided on a base plate 11, an insert cylinder part 22 to which the boss 14 is connected is provided on a transparent cover member 13 made of synthetic resin, a thin part 22 is formed in a suitable position of the insert cylinder part 22, and an unremovable rivet 26 is driven in the boss 14 through the insert cylinder part 22 to integrally assemble a circuit board case 10, whereby when the cover member 13 is forcedly broken open for conducting an unfair practice such as remodelling of a circuit board 12, the cover member 13 is broken at the thin part 25 first, and further the traces of breakage can be visually confirmed from the outside of the cover member 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board case containing a circuit board for controlling the operating state of a ball game machine.

[0002]

2. Description of the Related Art Conventionally, in a pachinko machine, which is a ball-and-ball game machine, for example, a board case for controlling the operation state is attached to the back side. The board case is configured by integrally assembling a base plate mounted on the back side of the pachinko machine, a circuit board mounted on the front side of the base plate, and a cover body covering the circuit board with screws. In addition, in order to prevent fraudulent acts such as making the game betting by modifying the circuit board arbitrarily, the pachinko machine is straddled over the base plate and the cover body when shipping from the pachinko machine manufacturer to each pachinko hall. To stick the seal. Then, when the seal is forcibly peeled off at each pachinko hall and the cover body is opened to perform the wrongdoing, the fraudulent operation is performed by checking the broken seal during the on-site inspection. I have to.

[0003]

However, there have been frequent injustices in which the sealing seal is deliberately peeled off, the cover is opened, and the circuit board is arbitrarily remodeled. Because of the restoration, it is difficult to detect the on-site inspection at the pachinko hall, making it difficult to perform the inspection effectively, and there has been a problem that the function of preventing fraud has not been sufficiently performed. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a board case of a ball-and-ball game machine in which the detection of fraudulent acts is facilitated and the effectiveness of fraud prevention is enhanced. It is.

[0004]

In order to achieve the above object, a board case of a ball game machine according to the present invention comprises a base plate mounted on the back side of the ball game machine and a front plate mounted on the base plate. A circuit board for controlling the operation state of the ball and ball game machine, and a transparent synthetic resin cover body which is substantially the same size as the base plate and is attached to the front surface of the base plate so as to cover the circuit board, A plurality of bosses are provided at appropriate places on the front surface of the base plate, while a cover body is provided with a front end opening cylindrical portion corresponding to each boss and communicating with each boss. Then, an undetachable stud is driven into each boss via these insertion cylinder portions. As a result, the cover is integrally fixed to the base plate and cannot be easily removed. In addition, a thin-walled portion is formed in the insertion tube portion that breaks relatively easily so that the cover body separates from the base plate when the cover body is forcibly opened from the base plate.
Thus, if the cover body is forcibly pryed open in order to arbitrarily remodel the circuit board, the cover body breaks from the thin portion. Therefore, at the time of inspection, the trace can be visually recognized through the cover body,
Cheating can be easily detected.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a board case of a ball game machine according to the present invention will be described in detail below. In this embodiment, a pachinko machine will be described, but the present invention can also be applied to other general ball and ball game machines such as an arrangement ball.

FIG. 1 is a back view of a pachinko machine equipped with a board case of the present invention, in which 1 is a pachinko machine, 2 is a game board, and a mechanism made of synthetic resin so as to cover the entire back surface of the sled. The plate 3 is mounted to be openable and closable. The mechanism plate 3 is provided with a prize ball tank 4 for storing a prize ball at an upper portion thereof, a tank rail 5 is provided below the prize ball tank 4, and a prize ball payout device 6 is provided at a lower end thereof. .

[0007] Below the prize ball payout device 6, there is provided a prize ball discharge passage 7 for paying out prize balls to the front of the pachinko machine 1. Further, an opening 8 is formed in the center of the mechanism plate 3, and a winning ball collecting cover 9 made of synthetic resin which is directly attached to the back surface of the game board 2 faces the opening 8, and as shown in FIG. The substrate case 10 according to the present invention is mounted on the back of the winning ball collecting cover 9.

FIG. 3 is a perspective view of the substrate case 10, and FIG. 4 is an exploded perspective view of the same. The board case 10 includes a base plate 11 mounted on the back of the winning ball collecting cover 9,
It comprises a circuit board 12 attached to the front surface of the base plate 11 for controlling the operation state of the pachinko machine 1, and a box-shaped cover body 13 covering the front surface of the circuit board 12. The base plate 11 is formed of a rectangular metal plate, and a metal boss 14 having boss holes 15 at four upper and lower corners is provided on the front surface thereof. The upper edge of the base plate 11 is bent forward, and a receiving frame 16 for receiving the rear surface of the circuit board 12 is provided along the inside thereof. Further, a hook-shaped hooking piece 17 is provided on the upper edge of the back surface of the base plate 11, and a push-expandable rivet stopper 18 projecting rearward is attached to the center of the lower edge of the front surface. I have.

The circuit board 12 has substantially the same shape as the base plate 11, and has mounting holes 19 in the upper and lower four corners that match the boss holes 15 of the bosses 14. The cover body 13 is made of a transparent synthetic resin, has substantially the same size as the base plate 11, and has a box-like shape whose rear surface is open and covers the front surface of the circuit board 12. The front wall 13b and the circuit board 12 extend vertically between the side walls 13a, 13a, open the front wall 13b side to communicate with the outside, and connect the boss holes 15 to the circuit board 12 side. Insertion hole 2 that matches
1 is formed into a cylindrical insertion tube portion 22.

[0010] More specifically, the plug-in tube portion 22 is provided as shown in FIG.
As shown in (a), the large-diameter cylindrical portion 23 on the front wall 13b side.
a and a small-diameter cylindrical portion 23b on the circuit board 12 side, and an annular thin portion 25 thinner than other portions is formed on the outer peripheral edge of a bottom wall 24 having an insertion hole 21 at the lower end of the small-diameter cylindrical portion 23b. .

Then, first, the circuit board 1 is mounted on the front surface of the base plate 11.
2, the cover 13 is attached so as to cover the front surface of the circuit board 12 in a state where each mounting hole 19 and each boss hole 15 are aligned with each other. A metal stud 26 is driven into each boss hole 15 to assemble the board case 10. Each stud 26 is attached to each boss hole 15
And has a helical ridge for retaining on the peripheral surface, and once inserted, is firmly fitted and cannot be removed. As a result, the cover 13 is fixed to the base plate 11 in a state where it cannot be normally removed.

The board case 10 assembled as described above is mounted on the back of the winning ball collecting cover 9 of the pachinko machine 1 as shown in FIG.
7 is connected. The pachinko machine 1 with the board case 10 mounted in this way is shipped from a pachinko machine maker to each pachinko hall. Therefore, for example, when trying to forcibly open the cover body 13 in order to remodel the circuit board 12 in a pachinko hall, a thin portion having a weak strength formed on the outer peripheral edge of the bottom wall 24 of each insertion tube portion 22. Twenty-five points are broken, and traces thereof remain. Since the trace can be easily visually recognized from the outside of the transparent cover body 13, the wrongdoing is found during the on-site inspection at the pachinko hall.

FIG. 5B shows another embodiment according to the present invention, in which an annular portion is provided between the lower end portion of the large-diameter tube portion 23a of the insertion tube portion 22a and the upper end portion of the small-diameter tube portion 23b. Thin part 25 of
a. Also, the insertion tube portion 22b shown in FIG.
Forms an annular thin portion 25b between a lower end portion of a relatively long large-diameter cylindrical portion 23c and an upper end portion of a relatively short small-diameter cylindrical portion 23d,
In addition, in this case, the lower surface of the thin portion 25b is formed in R. This is because the thin portion 25b is made as thin as possible to facilitate breakage. It is needless to say that the location and the shape of the thin portion are not limited to these. For example, a cut having a triangular cross section may be provided on the outer peripheral surface of the large-diameter cylindrical portion 23a.

In the present invention, the studs 26 are driven into the upper and lower four corners of the board case 10, respectively.
As shown in (2), the stud 26 may be driven into only one of the diagonally located corners of the base plate 11. That is, a metal boss 14 having a boss hole 15 is provided at one diagonally opposite corner of the base plate 11, and a metal boss 14 having a screw hole 28 is provided at the other diagonally opposite corner. A mounting boss 29 is provided. Then, the base plate 11, the circuit board 12, and the cover 13 are overlapped, and
Driving the studs 26 into the four and fourteen bosses 29
And the board case 10 is assembled integrally, and in this state, it is mounted on the back side of the pachinko machine. This means that, for example, in the event that a fraudulent activity is detected in an on-site inspection at a pachinko hall, the circuit board 12 is returned to a correct state and reused.
At this time, a screw is screwed into both mounting bosses 29, 29 so that the board case 10 can be assembled. In this case, in order to prevent the wrongdoing from being performed again,
A sealing sticker is attached so as to close the front end opening 20 of the insertion tube portion 22.

Further, as shown in FIG.
The same operation and effect as described above can be obtained even if the studs 26 are driven into the four corners of the 0 in the same manner as in the present embodiment, and can be screwed at the intermediate position on both sides in the longitudinal direction.

[0016]

As described above, in the board case of the ball game machine according to the present invention, the base plate is provided with the boss, and the transparent synthetic resin cover body is provided with the insertion tube portion communicating with the boss. Since a thin portion is formed at an appropriate position on the insertion tube portion and a non-removable tack is driven into the boss through the insertion tube portion to fix the cover body to the base plate, In that case, the cover cannot be easily opened, which prevents illicit acts of modifying the circuit board. Also, if the cover body is to be forcibly pryed open to perform wrongdoing, the cover body will break from the thin portion of the insertion tube part, and since this trace can be visually recognized from the outside through the cover body, During the on-site inspection, it is easy to find out the fact that the wrongdoing has taken place. As a result, there is almost no chance of overlooking the board case where the fraud has been performed, and the effect of preventing the fraudulent acts can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is a rear view of a pachinko machine to which the present invention is applied.

FIG. 2 is a perspective view of a main part showing a normal mounting state of the board case.

FIG. 3 is a perspective view of a board case.

FIG. 4 is an exploded perspective view of the board case.

FIG. 5 is a sectional view of a main part of the board case.

FIG. 6 is an exploded perspective view of a board case according to another embodiment.

FIG. 7 is an exploded perspective view of a board case according to another embodiment.

[Explanation of reference numerals] 1 pachinko machine (ball game machine) 10 board case 11 base plate 12 circuit board 13 cover body 14 boss 20 opening 22, 22a, 22b insertion tube portion 25, 25a, 25b thin portion 26 tack

Claims (1)

[Claims] 1. A base plate mounted on the back side of a ball game machine,
A circuit board attached to the front surface of the base plate for controlling the operation state of the ball-and-ball game machine; and a transparent synthetic resin made of substantially the same size as the base plate and attached to the front surface of the base plate so as to cover the circuit board. A plurality of bosses are provided at appropriate places on the front surface of the base plate, while the cover body is provided with a plurality of insertion tube portions each having a front end opening corresponding to each boss and communicating with each boss. Provide a non-detachable rivet to each boss through these insertion tube parts to fix the cover body to the base plate, and forcibly open the cover body from the base plate at an appropriate position in the insertion tube part. A substrate case for a ball-and-ball game machine, wherein a thin wall portion that breaks relatively easily is formed.