| 摘要 |
The present invention relates to a door locking device. The device, opening or closing a door, includes a plate part installed on the door, and including a bolt hole; a motor part providing rotational force; a screw part having the thread formed on an outer surface, and having an end part combined with the motor part to rotate with the rotational force of the motor part; and a bolt part including a through hole with the threaded rod for the thread, and closing the door by being inserted into the bolt hole or opening the door by being taken out of the bolt hole by linearly moving along a rotation axis direction of the screw part when the screw part is rotated by being combined with the through hole. Therefore, the bolt part, closing the door by being inserted into the bolt hole or opening the door by being taken out of the bolt hole, is combined with the screw part, and therefore, the door is prevented from being forcibly opened as the bolt part, exposed through a gap of the door, is pressurized. |
