| 摘要 |
PROBLEM TO BE SOLVED: To provide a pinball game machine capable of replacing a game board and a transparent plate holding frame easily and holding the transparent plate holding frame in a firm closed state having no clearance.SOLUTION: A transparent plate holding frame 14 is borne in an openable manner on one side edge of a body frame 6. A game board 20 having a game area 21 allowing a game ball to roll is interposed between the body frame and the transparent plate holding frame. A locking device 40 including a cylinder lock 12 having a key hole exposed to the front face of the body frame is disposed at the other side edge of the body frame. Said locking device is equipped with a first engaging mechanism for engaging with the transparent plate holding frame. On the back face of the transparent plate holding frame, an engaging/disengaging mechanism for engaging with the game board is disposed to associate with the locking device. By rotationally operating the cylinder lock with a specific key, the engagement with the transparent plate holding frame by the first engaging mechanism is released, and the engagement with the game board by the engaging/disengaging mechanism can be released to open said transparent plate holding frame. |
