| 摘要 |
PROBLEM TO BE SOLVED: To keep the interest of a player by starting the rotation of a plurality of rotary bodies by the energizing of a starter when an elapse time is below a predetermined play time and gradually raising the rotational speeds of a plurality of the rotary bodies up to a predetermined definite rotational speed corresponding to the difference between the elapse time and the predetermined play time. SOLUTION: If stop buttons 101 -10k are made ineffective until the rotation of rotary bodies becomes a definite speed and a starter S is operated at arbitrary time in relation to the starter S, the pulse generator in a stepping motor driving circuit 16 always generates an exciting pulse signal automatically to continuously supply the same to stepping motors 181 -18k to rotate respective rotary bodies 201 -20k . The elaspse time from the point of time when the rotary bodies 201 -20k in the previous game reach a definite rotational speed is monitored by a CPU 12 and, after the rotation of the rotary bodies 201 -20k is accelerated to a definite speed in the game of this time, the stop buttons are made effective. |
