| 摘要 |
<p>Provided is a door unit including a door which is hinged to a door frame, the door unit further including an inside plate facing an indoor room, an outdoor plate facing an outdoor room and a lateral plate formed of iron and connecting the inside plate to the outside plate; a locking element installed inside the door and including a case and latch elements that move in and out from a side surface of the case so as to lock/unlock the door in the door frame; and a door knob installed on the inside plate of the door and connected to the locking element so as to control the latch elements to move in and out, wherein the side surface of the case has through holes through which the latch elements pass, a reinforcing plate to be fixed to the door and which covers the side surface of the case, and the reinforcing plate is fixed to the door by rivets.</p> |
