| 摘要 |
PROBLEM TO BE SOLVED: To reliably fit silicon( balls to a substrate, to prevent the silicon balls from being floated or dropped from the substrate during the transportation of a game machine, and to reliably prevent the defective lighting caused by the defective contact or the lack of the silicon balls. SOLUTION: This drop preventing structure for the silicon balls 1 used for the game machine is provided with flanges 5a provided on boot sections 5 of silicon balls 1 fitted to the substrate 2 and a drop preventing plate 3 arranged abuttably with the flanges 5a on the separating side of the flanges 5a from the substrate 2.
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