Patent ID: 8621900

Claim:
An electric door lock, comprising: a lock housing; an operating member having a holding part and a shaft part, the shaft part partially disposed in the lock housing, the shaft part connecting to the holding part, the holding part defined as having a long axis; a motor placed in the lock housing, having a worm shaft in a front part thereof, which can drive a worm wheel to drive a cog wheel, the cog wheel having at least one bump; a coupling plate set on the shaft part of the operating member, the coupling plate having at least one bulge and one protruding part, with the protruding part and the long axis of the holding part designed to move in alignment with each other; and three sensor switches set separately in the lock housing, wherein, operating the motor causes the at least one bump of the cog wheel to rotate and push the at least one bulge on the coupling plate, so that the protruding part of the coupling plate of the electric door lock installed in a required position on a left-hand door or a right-hand door, selectively touches two adjacent sensor switches, so as to reach a correct unlocked position or locked position, and wherein the coupling plate has a plate, a ringed part and an arc part, at least one first junction connecting the plate and the ringed part, the lock housing having an arc shaped groove, the arc part of the coupling plate being able to rotate in the arc shaped groove of the lock housing, the lock housing having a first flange and a second flange, between the first flange and the second flange being the arc shaped groove and an extension, at least one blocking surface being formed on the extension, at least one stopper being formed on the arc part of the coupling plate, the at least one blocking surface and the at least one stopper being able to limit a turning angle of the coupling plate.