| 摘要 |
PROBLEM TO BE SOLVED: To efficiently prevent an illegal act using an illegal ball referred to as a line ball, in a game machine including a winning hole into which a game ball flowing down in a game region partitioned and formed on the surface of a game board can successfully enter, a ball flow-down path making the game ball having successfully entered the winning hole flow down, and a ball detection sensor that can detect the game ball flowing down through the ball flow-down path.SOLUTION: A ball detection sensor 611 for detecting a game ball that passes therethrough is provided. A ball detection passage part 740, which is a part of the ball detection sensor 611, having a width that allows a passage of a game ball is disposed so as to face a ball flow-down path (a ball joining flow-down path 725). At a directly upstream part of the ball detection passage part 740 in the ball flow-down path, a small width area 741 is provided, the small width area 741 having a flow path width that can at least allow a passage of a game ball, and that is set smaller than the width of the ball detection passage part 740. Also, the width at directly downstream part of the ball detection sensor 611 is set approximately the same as the width of the ball detection passage part 740 or larger than the width of the ball detection passage part 740, and the width of the position located closer to the downstream side than the position of the directly downstream part is configured to be approximately the same as the width of the directly upstream part. |
