| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball return prevention device of a pinball game machine, having a configuration to effectively restrict a fraudulent winning action to detect the winning of a game ball by fraudulently operating the game ball with a threadlike body such as a fishing line. <P>SOLUTION: The ball return prevention device 50 for preventing the game ball shot toward a playfield from returning to a shooting rail 12 includes a rocking member 90 whose base part 91 is pivotally connected to a rocking shaft 61 extending in a substantially vertical direction with respect to a game board and which is rockable between a position where an opening/closing part 93 extending from the base part 91 to one end side closes an outlet opening 12c with the rocking shaft 61 as a center and a position where the opening/closing part 93 opens the outlet opening 12c. The rocking member 90 is normally biased in a direction to close the outlet opening 12c, rocks in a direction to open the outlet opening 12c by pressure force when the game ball that has passed through the shooting rail 12 pressurizes the opening/closing part 93, and includes a blade shape cutting part 94 at the distal end of the opening/closing part 93 in the rocking member 90. <P>COPYRIGHT: (C)2012,JPO&INPIT |
