Abstract: A method for operating a locking device, wherein the locking device disposed in a first main body includes a first locking element. In an embodiment, when the first locking element is forced to separated from a second locking element disposed on a second main body, a pushing element connecting the second main body through an elastic element receives an elastic force by the elastic element to push the second locking element, so that the second main body moves with respect to the first main body. In another embodiment, when a first force is applied onto the first locking element so that the first locking element exits the locking position of the first locking element and the second locking element, a damping restoration element pivoted between the first locking element and the first main body drives the first locking element to be resumed to the locking position after a time interval.