| 摘要 |
The present invention provides an apparatus for opening and closing a door which uses one safety switch to reduce costs, eliminates a need for separately making a part for fixing the switch on a door, and reduces a risk of damaging the safety switch by opening the door hard since the safety switch operates as soon as the door is fixed. According to an embodiment of the present invention, the apparatus for opening and closing a door comprises: a door; a rotary handle installed on an outer surface of the door; a first link installed on an inner surface of the door, whose one end is connected to the rotary handle; a second link installed on the inner surface of the door, whose one end is detachably mounted on the other end of the first link; a third link installed on one end of the inside of the door in a vertical direction, whose one end is connected to the other end of the second link; and a safety switch installed on an upper end of the inside of the door, whose one end is detachably mounted on the other end of the third link. |
