| 摘要 |
An entrance door of a building for sensing closing of the door is provided to reduce vibration and noise by relieving shock in closing the door, and to display closing, opening or locking of the door by forming a display member in an upper part of the entrance door. An entrance of a building includes a door frame projection contacted to a door inside(1120) of a door(1100) and protruded for a knob(1500), a closing shock buffer unit formed in the surface of the door frame projection vertically protruded from a door contact part to relieve shock between the door and the door frame in closing the door with plural rods, a door closing sensor(500) formed successively with the closing shock buffer unit to detect opening or closing of the door, a door locking sensor(700) detecting locking of the door, a display unit(200) formed in an indoor wall(1200) for displaying opening, closing or locking of the door, and a control unit(900) formed in the indoor wall to control the door closing sensor, the door locking sensor and the display unit. The state of the door is displayed by operating an opening display unit(210), a closing display unit(220) and a locking display unit(250). |
