| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which practically enables the highly effective prevention of illegal replacement and modification of control elements by sealing up upper and lower covers of a controller with a sealing screw capable of performing a very high institutional sealing function. SOLUTION: In the controller 1 of a Pachinko game machine, each right and left one of thread holding parts 9, 9, ... so installed on an upper cover 6 as to be easily tearable is screwed down separately on thread engaging bodies 20 and 20 of a lower cover 5 with a sealing screw 13, thereby keeping the upper and lower covers 6 and 5 joined together. In addition, the sealing screw 13 utilizes a rotary transmission mechanism (one-way clutch mechanism) and when a rotating operation member is turned clockwise, its rotating force is transmitted to a male thread part 61 to turn, but when it is turned anti-clockwise, the male thread part will not turn. COPYRIGHT: (C)2011,JPO&INPIT
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