Patent ID: 9556644
Date: 2017-01-31
CPC Classifications: E05B,E05C,Y10T

Claim:
1. An apparatus for opening and closing an entrance, comprising: first and second door handles respectively provided on first and second surfaces of a door, each of the first and second door handles being configured to be pushed or pulled; a moving unit disposed in a door lock housing installed in the door, the moving unit being coupled at a first end thereof to the first door handle and coupled at a second end thereof to the second door handle so that the moving unit is horizontally moved by pushing or pulling either the first door handle or the second door handle; a rotating unit rotatably coupled at a first end thereof on a rotating shaft, the rotating shaft being provided at a predetermined position in the moving unit, the rotating unit being locked at a second end thereof to the moving unit so that when the moving unit horizontally moves, the rotating unit rotates around the rotating shaft; an actuating member locked to the rotating unit, the actuating member being moved in a direction perpendicular to a direction in which the moving unit moves; a latch unit fixed at an end thereof to the actuating member, the latch unit being ejected from or retracted into the door by the movement of the actuating member; and a restoring spring wrapped around the rotating shaft, the restoring spring being fixed at a first end thereof to an inner surface of the door lock housing and fixed at a second end thereof to the second end of the rotating unit so that when the rotating unit is rotated, the restoring spring is compressed, and when an external force that has rotated the rotating unit is removed, the restoring spring returns the rotating unit to a pre-rotated state thereof.