| 摘要 |
PROBLEM TO BE SOLVED: To prevent an erroneous detection that an illegal action such as hitting of a machine frame is carried out. SOLUTION: A vibration sensor 90 accommodates a spring member 93 and a weight 94 in a sensor case 92. One end of the weight 94 is fixed to the sensor case 92 through the spring member 93 and is not vibrated by a small vibration arising when a player normally hitting a button of the machine frame. The vibration sensor 90 is attached to a display board case 77 which does not come into direct contact with a ball guide case. A vibration arising when a playing ball passes the ball guide case is damped by the display board case 77 and transmitted to the vibration sensor 90. Accordingly, the erroneous detection that the illegal action is carried out, can be prevented, owing to the small vibration arising when the player normally hitting the button of the machine frame and the vibration arising when the playing ball passes through the ball guide case. COPYRIGHT: (C)2010,JPO&INPIT |
