disclosed is an electronic coin - collecting mechanism including a vertically movable sensor to examine qualified coins inserted into the mechanism so as to actuate a game on which the mechanism is mounted . the sensor consists of a first and a second oscillating coils and an inductive coil sandwiched between them , forming a first slot way and a second slot way at a lower portion of the sensor . the sensor can be set or reset to examine selected coin specifications simply by lifting it to allow a selected coin to be put into the second slot way and then letting down the sensor again . therefore , the electronic coin - collecting mechanism is conveniently - applicable to any type of coin and may effectively detect any disqualified coin and discharges the same .