BALL QUANTITY-DETECTING SWITCH-MECHANISM FOR PACHINKO BALL RESERVE TANK

PROBLEM TO BE SOLVED: To increase a sensitive area of a rocking block against the main body of a sensor and remarkably decrease malfunctions and reduce wear and fatigue of the rocking block by locating the rocking block in such a condition that it may be rocked to the wall board side of a reserve tank by its dead weight to be locked in the wall board and it may be rocked back to the main body of the sensor by the pressing force of balls in the tank. SOLUTION: A rocking block 7 is so located that a U-shaped frame 7a may project into a reserve tank 2 by its dead weight and an L-shaped frame 7b at the top end may go away from the main body 6 of a sensor as shown by a solid line and then an OFF signal may be transmitted and, as shown by a vertual line, when the U-shaped frame 7a is pressed from inside the reserve tank 2, the U-shaped frame 7a may be rocked out of the reserve tank 2 and the L-shaped frame 7b at the top end may come near the main body 6 of the sensor or be brought into contact with it and then an ON signal may be transmitted. When the quantity of balls does not reach an opening 4 of the reserve tank 2, the rocking block 7 is inclined by its dead weight as shown by the solid line and an OFF signal is transmitted and, when the balls reach the opening 4, the rocking block 7 is pressed back to the main body 6 of the sensor by the volume of the reserved balls and an ON signal is transmitted.