| 摘要 |
PROBLEM TO BE SOLVED: To prevent parts on the backside of the game board of a pachinko machine which has a ball extraction passage merged with a premium winning ball collecting chute part from being damaged by jumping pachinko balls dropping from the ball extraction passage to the premium winning ball collecting chute at ball extraction. SOLUTION: Plural projecting parts are alternately formed on the right and left inner walls of a ball extraction passage 25 and upper faces 28a of projecting parts 28 are formed in down slopes toward the center of the ball extraction passage 28. Thereby, pachinko balls in the ball extraction passage 25 are alternately collided with right and left projecting parts 28 and flowed down zigzag to reduce the flowing down speed of pachinko balls to suppress jumping of pachinko balls dropping down to the bottom face 22a of a premium winning ball collecting chute part 22. Further, a jumping ball protection wall 29 is formed facing the bottom face 22a of the premium winning ball collecting chute part 22 to repulse pachinko balls down ward even if pachinko balls jump up with great force at the bottom face 22a of the ball extraction passage 25 by any chance.
|
