| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine capable of improving passage determination accuracy of a game medium suitably.SOLUTION: An operation port 84 is formed on a game board 80 of a pachinko machine. Game balls entering the operation port 84 are guided to the rear side of the game board 80 through a guide passage. A vertical passage communicating with the guide passage is provided on a back side of the game board 80. A first detection sensor and a second detection sensor are provided at a middle position of a collection passage. When detecting the game balls, signals of the game ball detection are output from each detection sensor to a main controller. The first detection sensor attenuates an alternating current change of a high frequency signal during the passage of the game ball and generates a signal of the game ball detection based on the attenuation of the alternating current change. The second detection sensor attenuates an alternating current change of a high frequency signal during non-passage of the game ball and generates a signal of the game ball detection based on the attenuation of the alternating current change. In reading processing of the detection signals in the main controller, determination processing is executed to determine abnormality of the detection signals based on the detection signals from each detection sensor.SELECTED DRAWING: Figure 5 |
