| 摘要 |
PROBLEM TO BE SOLVED: To suppress the generation of chips and to improve quality reliability. SOLUTION: A rotating body 2 is rotatably mounted on a shaft member 3 attached to a game panel 10 and the rotating body side bottom surface 9 of the head part 8 of the shaft member 3 is formed into an arc surface to be gradually separated from the rotating body 2 as approaching an outer side. Even when the rotating body 2 is rotated in the state tilted to the shaft member 3 by the contact of a ball flowing down a game area, just the front surface of a receiving seat part 4 is brought into contact with the rotating body side bottom surface 9 of the head part 8, the receiving seat part 4 is not brought into contact with the peripheral edge 11 of the head part 8 and the receiving seat part 4 is not chipped.
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