JPH07457U - Anti-fraud device for pachinko machines - Google Patents

Abstract

(57) [Summary] [Structure] A transparent metal thin film 5 is formed on a front glass 2 of a pachinko machine 1, and the metal thin film 5 is electrically connected to a metal frame 3 provided along an edge of the front glass 2. The metal frame 3 is grounded. [Effects] When the pachinko machine 1 is irradiated with microwaves, the metal thin film 5 of the front glass 2 blocks the microwaves and causes noise current to escape to the ground through the metal frame 3, so that the pachinko machine 1 is operated. Prevents malfunction of the controlling microcomputer and prevents illegal games.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for preventing an illegal game on a pachinko machine.

[0002]

[Prior art]

 In recent years, the functions of pachinko machines have become complicated, and processing such as handling prize balls, displaying prizes at the time of winning prizes, and discharging prize balls has been electronically performed using a microcomputer.

Along with this, a pulse current is externally applied to a metal part of a pachinko machine or a microwave is irradiated, which causes a malfunction in the microcomputer, and fraudulent fraudulent prize ball fraud is performed. It is like this.

In order to prevent such fraud, conventionally, a metal part of a pachinko machine is grounded so that a pulse current flowing therethrough is released to the ground to prevent a malfunction of a microcomputer.

[0005]

[Problems to be solved by the device]

 By this means, it became possible to deal with frauds in which a current is directly applied to the metal part of a pachinko machine, but it is possible to sufficiently deal with frauds that irradiate microwaves to induce malfunctions. There wasn't.

That is, microwaves are directly radiated to an electronic circuit through the front glass, and a noise current is generated there to induce a malfunction, which cannot be prevented only by grounding a metal frame. .

The present invention has been made in view of the above circumstances, and an object thereof is to provide a fraud prevention device capable of effectively preventing an error caused by microwave irradiation.

[0008]

[Means for solving the problem]

 Thus, the present invention forms a transparent metal thin film on at least one of the front surface, the back surface, and the wall thickness of the front glass of a pachinko machine, and the metal thin film is provided along the edge of the front glass. The metal frame is electrically connected to the metal frame and the metal frame is grounded.

Further, in the present invention, a metal plate is provided in the middle of the ground wire connected to the metal frame, and a capacitor and a coil are connected in parallel between both ends of the metal plate, and the grounding to the pachinko machine is performed. It is preferable to prevent noise current from entering.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 shows an embodiment of the present invention, in which 1 is a pachinko machine, 2 is a front glass thereof, and 3 is a metal frame provided along the edge of the front glass 2.

The front glass 2 has a transparent metal thin film 5 formed on the back surface of a glass plate 4, and the metal thin film 5 is electrically connected to the metal frame 3 via a mounting bracket 6. Has been. As the metal thin film 5, a thin film such as tin oxide or NES formed on the glass plate 4 by sputtering is suitable.

The metal thin film 5 is not limited to the back surface of the glass plate 4, but may be formed on the front surface or may be formed within the wall thickness. It can also be formed at two or more positions on the front surface, the back surface, and within the wall thickness.

The metal thin film 5 may be formed uniformly over the entire surface of the glass plate 4, or may be formed in a grid shape or a stripe shape, but in any case, it is formed as a whole. Therefore, the metal frame 3 needs to be electrically connected.

Reference numeral 7 is a ground wire, one end of which is connected to the metal frame 3. A metal plate 8 is interposed in the middle of the ground wire 7, and a capacitor 9 and a coil 10 are connected in parallel between both ends of the metal plate 8 to form a protection circuit, so that noise current from the ground is generated. It prevents you from entering a pachinko machine.

Reference numeral 11 denotes a centralized grounding wire. The tip of each grounding wire 7 connected to each of a plurality of pachinko machines 1 arranged in parallel is connected to the centralized grounding wire 11, and the centralized grounding wire 11 is grounded to the ground. By doing so, the ground wire 7 of each pachinko machine 1 is grounded.

[0016]

[Action]

 In the present invention, when the pachinko machine 1 is irradiated with microwaves from the outside, the metal thin film 5 formed on the front glass 2 shields the microwaves and protects the microcomputer.

The metal thin film 5 that shields microwaves is grounded through the metal frame 3, and the noise current generated in the metal thin film 5 is released to the ground through the metal frame 3 to cause noise current. Does not stray to the pachinko machine 1 and cause a malfunction in the microcomputer.

Further, even when a pulse current is directly applied to the metal frame 3, the metal frame 3 is grounded, so that the current is released to the ground and does not cause a malfunction in the microcomputer. .

Further, according to the second aspect of the invention, since the protection circuit is interposed in the middle of the ground wire 7, abrupt current change is buffered in the protection circuit. Therefore, when the noise current flows back from the ground to the pachinko machine 1 or when one of the many pachinko machines 1 arranged in parallel is tampered with, the noise current generated by it causes the noise current generated by the ground wire 7 and This prevents backflow to another pachinko machine 1 via the centralized grounding wire 11 and causing malfunction.

[0020]

[Effect of device]

 Therefore, according to the present invention, even if the microwave is irradiated, the metal thin film 5 shields the microcomputer, so that the microcomputer does not malfunction and the illegal game can be prevented.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the main part of the embodiment.

[Explanation of symbols]

 1 Pachinko machine 2 Front glass 3 Metal frame 5 Metal thin film 7 Ground wire 8 Metal plate 9 Capacitor 10 Coil

Claims (2)

[Scope of utility model registration request] 1. A front glass (2) of a pachinko machine (1).
A transparent metal thin film (5) is formed on at least one of the front surface, the back surface, and the wall thickness, and the metal thin film (5) is provided along the edge of the front glass (2) with a metal frame ( 3) A fraud prevention device for a pachinko machine, characterized in that the metal frame (3) is grounded. 2. A metal plate (8) is interposed in the middle of a ground wire (7) connected to the metal frame (3), and a capacitor (9) and a coil () are provided between both ends of the metal plate (8). 1
0) are connected in parallel, and the fraud prevention device for a pachinko machine according to claim 1, characterized in that