Patent ID: 8661733

Claim:
An electric door-locking device adapted to at least one electric door body that is able to slide comprising: a screw capable of rotating forwards and rearwards in one side of a door frame in the direction in which the door body slides; a locking hook provided in the proximity of the screw; and a sliding unit wherein one end thereof is rotatably connected to the screw and another end thereof is connected to the door body, wherein the sliding unit including a locking lever rotatably provided therein and having a latch for latching onto the locking hook when the electric door is closed, and a locking lever-pressing part actuated to press the locking lever such that the latch of the locking lever unlatches from the locking hooks, wherein the sliding unit comprises: a transfer nut rotatably screwed-coupled to the screw such that it is rotatable in the longitudinal direction of the screw; a transfer nut bundle including the transfer nut, a support for the transfer nut, and the locking lever-pressing part; a transfer nut bundle housing partially surrounding and supporting the transfer nut bundle such that the transfer nut bundle is rotatable at a certain angle; and a locking lever hinge rotating the locking lever at a certain angle in a direction perpendicular to an advancing-direction of the sliding unit, wherein the transfer nut bundle housing comprises: a housing body; and an opening formed to one side of the housing body such that the locking lever-pressing part is exposed to a locking lever roller.