| 摘要 |
PURPOSE: An entrance door structure is provided to prevent a doorframe shock absorbing unit from being separated from a doorframe even if repetitive shock is applied to the doorframe. CONSTITUTION: An entrance door structure comprises an entrance door support unit(11), a doorframe shock absorbing unit(20), and elastic units(40). The entrance door support unit is formed on the inner surface of a doorframe(10) and supports one end of an entrance door frame(31). The doorframe shock absorbing unit is coupled to the entrance door support unit and covers the front of the entrance door support unit to absorb shock. The elastic units are coupled to one side of the entrance door frame and absorb shock when the entrance door frame is closed. |
