| 摘要 |
PROBLEM TO BE SOLVED: To easily detect the number of game balls advancing to a game area on the outside of a game machine and to facilitate a hitting test further. SOLUTION: Before and after a hit ball flow-out part to the game area, a first sensor and a second sensor for detecting a hit ball are installed. At the normal time, since the first timer is turned on and then the second sensor is turned on before a time difference monitoring timer times out, an advancing ball signal is outputted. When the hit ball returns to a hitting device side after passing through the first sensor, since the second sensor is not turned on and the time difference monitoring timer times out, the advancing ball signal is not outputted. Also, when the hit ball returns from the game area 7 to the hit ball flow-out part and the second sensor is turned on, since the first sensor is not turned on before that, the advancing ball signal is not outputted. Thus, the advancing ball signal accurately indicates information relating to the game ball which advances into the game area. COPYRIGHT: (C)2008,JPO&INPIT
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