| 摘要 |
PROBLEM TO BE SOLVED: To enhance the durability for a long-term usage by engaging an engagement member with the engagement piece of an outer frame to hold a middle frame in a closed state concerning the outer frame and engaging/ separating a part of the engagement member in a supported state by means of a guide hole which is arranged at an end edge at the open side of the middle frame. SOLUTION: In a PACHINKO(Japanese pinball game) machine 1, the middle frame 3 and a front surface frame 4 are pivotally supported on the front surface of the outer frame 2 so as to be freely single swinging possible with each one end edge as an axis. A lock device 7 for holding the middle frame 3 and the front surface frame 4 in the closed state is arranged at the other end edge of the middle frame 3. In this case, when the middle frame 3 is pushed into the outer frame 2 in a closing direction, the hook part 16a of the engagement member 24 in the lock device 7 is engaged with the engagement piece 9a arranged in the outer frame 2 after a downward rocking evading movement. At this time, the base end of the hook part 16a is specially inserted to the guide hole 56 formed in the frame 10 of the lock device 7 and supported by the guide hole 56 so that a stable rotation is guaranteed. |
