Patent ID: 8661732

Claim:
An electric door lock comprising: a locking switch provided in a door frame for checking the locking state of a door body when the door body is closed, the door frame slidably supporting at least one door body; a pair of screws capable of rotating forwards and rearwards and disposed parallel with each other in one side of the door frame in a direction towards which the door body slides; a locking roller guide provided in the door frame in the proximity of the screws; and a slide unit wherein one end thereof is rotatably connected to one of the pair of screws and another end thereof is connected to the door body, the slide unit including a locking switch-pressing plate actuated to operate the locking switch when the door body is closed, such that a locking signal is generated by the locking switch, and a locking roller acting in combination with the locking roller guide, wherein the sliding unit includes a screw nut that is rotatably screw-coupled to one of the pair of screws such that it is movable in the longitudinal direction of the screws; a screw nut bundle that surrounds and supports the screw nut and to which the locking switch-pressing plate and the locking roller are connected at one side; and a screw nut bundle housing that partially surrounds and supports the screw nut bundle such that the screw nut bundle can be rotated at a certain angle, wherein the screw nut bundle housing includes: a housing body; an opening that is formed to one side of the housing body such that the locking switch-pressing plate is exposed to the locking switch; and a through-passage that is formed in one side of the housing body to allow a support for the locking roller, which connects and supports the locking roller and screw nut bundle, to move therethrough.