JPS63300785A - Game stand - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a game machine used in a game machine such as a pachinko machine or a game machine, and particularly to a game machine designed to prevent fraud using magnets.

[Prior art and its problems]

(Prior Art) A game machine, such as a pachinko machine, has a transparent glass plate on the front and is operated while observing the movement of the pachinko balls. The game is played while operating the pachinko balls so that they enter a predetermined prize hole.

Therefore, there is a possibility that a player may cheat by using a magnet from above the glass plate to change the movement of the pachinko balls, which are rigid balls. In order to prevent such fraud, for example, as shown in Utility Model Application No. 60-153187, a band-shaped electrode is installed on a glass plate. There are known methods for detecting this.

(Problems to be Solved by the Invention) However, with such conventional game machines, since the electrodes are simply provided directly on the glass plate, it is extremely difficult to detect signals based on changes in the magnetic field. , it is necessary to amplify the signal with a high amplification factor. Therefore, there has been a problem that malfunctions are likely to occur due to noise and the like, and it is difficult to reliably detect fraud caused by magnets.

[Purpose of the invention]

The present invention has been made in view of these problems with conventional game machines, and its technical objective is to enable highly accurate detection of fraud using magnets.

[Structure and effects of the invention]

(Means for Solving the Problems) The present invention is a play table constructed by attaching a glass plate to the front surface, and as shown in FIG. An amorphous metal fiber wire, a detection coil that is provided at the end of the amorphous metal fiber wire, is wound around the amorphous metal fiber wire, and detects a pulse voltage generated at both ends of the wire, and a gusset effect obtained at both ends of the detection coil. The present invention is characterized by comprising a voltage detecting means for detecting a voltage exceeding a threshold level among the pulsed voltages according to the present invention.

(Function) According to the present invention having such features, an amorphous metal fiber wire is stretched over a glass plate provided on the play surface of a play machine, and the end portion thereof is communicated with the detection coil. When a magnet approaches the glass plate and a magnetic field of a predetermined value or more is applied, a pulse voltage is generated due to the gusset effect of the amorphous metal fiber wire. Therefore, a pulse voltage will also be generated at both ends of the detection coil. A pulse voltage exceeding a predetermined level is detected by the voltage detection means.

(Effects of the Invention) Therefore, according to the present invention, when a magnet approaches the glass surface of a ball game table and the magnetic field changes, the change can be immediately detected. Therefore, fraud by a ball player using a magnet can be immediately detected. Since the generation of pulsed voltage due to the Machius effect is detected, highly reliable detection can be performed.

[Explanation of Examples]

FIG. 2 is a perspective view of the game machine according to this embodiment, and FIG. 1 is a perspective view showing the state in which the front glass plate is opened at a predetermined angle. In these figures, a game machine 1 is provided with a game section 2 having a plurality of prize ball holes and a large number of nails for guiding pachinko balls. A glass plate 3 is provided on the front surface of the play table 1. The glass plate 3 is composed of, for example, two sheets of laminated glass, and an amorphous metal fiber wire as shown in FIG. 1 is embedded inside the glass plate 3. In this embodiment, for example, three amorphous metal fiber wires 4,
5 and 6 are buried in a three-shape shape as shown in the figure, their ends are brought together, and a detection coil is attached with the end as the axis. The detection coil 7.8 detects a pulsed voltage and is connected to a detection circuit which is a detection means for detecting a voltage exceeding a predetermined level. As shown in FIG. 3, in the detection circuit, both ends of detection coils 7 and 8 are connected to operational amplifiers 9 and 10, respectively, and further connected to operational amplifiers 11 and 12, respectively, for amplifying their outputs.

The output terminal of the operational amplifier 11 is given to two operational amplifiers 13 and 14 forming a window comparator. Since the pulse voltage obtained from the detection coil 7 changes in the positive direction and the negative direction, the predetermined threshold level V in the positive direction and the negative direction
Only signals exceeding refl and Vref2 are amplified by operational amplifiers 13 or 14, respectively. Also operational amplifier 1
Similarly, since the output of the detection coil 8 is a pulse voltage that changes in the positive and negative directions, the output of the detection coil 8 is set to the same upper and lower threshold levels V refL V ref2 by the two operational amplifiers 15 and 16 that constitute the window comparator.
Only signals that exceed . Now, the output terminals of the operational amplifiers 13 and 14 are connected in common, and are connected to the cathode terminal of the diode D1. Operational amplifier 15.1
Similarly, the output terminals of the diode D2 are commonly connected and connected to the cathode terminal of the diode D2. The anode terminals of the diodes Di and D2 are commonly connected to the power supply via a resistor R1, and are configured as an OR circuit 17 which takes the logical sum of the outputs of the operational amplifiers 13, 14 and 15, 16. The output of the OR circuit 17 is applied to a differentiating circuit 18 consisting of a capacitor C1 and a resistor R2. The output of the differentiating circuit 18 is applied to the inverting input terminal of an operational amplifier 19 forming a one-shot multipipe rake. The transistor Trl, resistor R3, and capacitor C2 connected between the inverting input terminal of the operational amplifier 19 and the power supply terminal are used to prevent malfunction of the operational amplifier 19 when the power is turned on. The output of the operational amplifier 19 is then output to the outside via the transistor Tr2.

FIG. 4 shows a detection coil 7 mounted vertically on the game machine 1.
8 in detail. Since the detection coils 7.8 have the same structure, only the cross section of the detection coils 7 is shown in FIG. As shown in this figure, the detection coil 7 has a tapered opening on the front surface and a through hole in the center, and the coil is wound inside the coil case 20 around the through hole.

The amorphous metal fiber wires 4 to 6 are constructed so as to penetrate through their central axes, and even if the position of the amorphous metal fiber wires changes when the glass plate is opened and closed, the ends of the amorphous metal fiber wires 4 to 6 remain intact when the glass plate is closed. The coil case 20 is configured such that the portion reliably passes through the center of the coil case 20. Both ends of the detection coil 7 are connected to the aforementioned operational amplifier 9 via shielded wires 21, respectively.

Next, the operation of this embodiment will be explained. First, as shown in FIG. 2, when a player attempts to cheat by bringing the magnet 22 close to the player during play on the game machine 1, the magnetic field near any of the amorphous metal fiber wires 4 to 6 changes.

For example, in the case of FIG. 2, the magnetic field near the amorphous metal fiber wire 6 changes, and when the change reaches a predetermined value, a pulse-like voltage is generated in the amorphous metal fiber wire 6 due to the Matthiushi effect. Therefore, a pulsed voltage will be detected by either one of the detection coils 7 or 8.

For example, if a pulsed voltage is detected in the detection coil 7, it is amplified as shown in FIG. 5 (al) via the operational amplifier 9, and then pulsed as shown in FIG. The voltage is amplified, and the voltage is set above and below threshold levels Vrefl, Vre.
If f2 is exceeded, the output is amplified by the operational amplifiers 13 and 14, so that a pulse-like voltage as shown in FIG. 5 (C1) is obtained at the common connection point. The differential voltage shown in FIG. In order to operate, a fraud detection signal as shown in FIG. 5 (tel) is output.

Now, depending on the position where the magnet is used, a pulse voltage is generated in one of the amorphous metal fiber wires.

Therefore, it is preferable to arrange the amorphous metal fiber wires at regular intervals on the glass surface of the game machine, as shown in FIG. 1, so that fraud can be detected at any position. In this way, a signal will be detected by at least one of the detection coils through which these metal fiber wires pass, and fraud caused by the magnet can be easily detected.

In this example, three amorphous metal fiber wires are used and two detection coils are used to detect the pulsed voltage, but it is possible to use a larger number of amorphous metal fiber wires or change the number of detection coils. Needless to say, it can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a ball game table according to an embodiment of the present invention;
FIG. 2 is a front perspective view thereof, FIG. 3 is a circuit diagram showing the configuration of the detection circuit, and FIG. 4 is a sectional view showing an example of the configuration of the detection coil.
FIG. 5 is a waveform diagram showing waveforms at various parts. 1-----One game stand 3----------Glass plate
4-6---Amorphous metal fiber wire 7.8
-----One detection coil 9 to 16, 1! L--
------Operation amplifier 17--OR circuit 18-
---Ittetsu Part Circuit Patent Applicant Tateishi Electric Co., Ltd. Agent Patent Attorney Kanki Okamoto (and 1 other person) Figure 1 1 --- Ichiyu s Uiri Hiai 4~6-----RyuLfa deposit wind 8\Shuu Rainbow Wara 7.8
----- One blow coil Figure 2 Figure 4

Claims (1)

[Claims] (1) In a play machine configured with a glass plate attached to the front surface, an amorphous metal fiber wire having a gusset effect affixed to the back surface of the glass plate, and an amorphous metal fiber wire provided at an end of the amorphous metal fiber wire. A detection coil that is wound around a fiber wire as an axis and detects a pulsed voltage generated at both ends thereof; and a voltage detection means that detects a voltage exceeding a threshold level among the pulsed voltages generated at both ends of the detection coil due to the Machiushi effect. A game machine characterized by comprising the following.