| 摘要 |
PROBLEM TO BE SOLVED: To provide a pinball game machine which can maintain the entertainment of action changes of game balls on the game board and the ease of game board replacement with reinforcing a game board with a lowered strength by making an opening in the game board. SOLUTION: When a plywood forming a game board 2 is prepared, boards with notches are located in the middle and boards without notches are located outside and they are adhered together to form dents 10 whose depth does not reach the depth of game area on the symmetrical positions of both the sides of the plywood. Reinforcing members consisting of metal or resin are inserted to dents 10 and are fixed with fasteners and the like to reinforce the game board 2 for preventing the game board 2 from being fractured, broken and heavily warped. In addition, the game board is attached to an inner frame through a game board attaching piece to prevent the breakage of the game board further. COPYRIGHT: (C)2009,JPO&INPIT
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