A connector mechanism includes a casing, a socket, a rotary cover and a resilient plate. An opening is formed on the casing. The resilient plate is connected to an inner side of the casing and the rotary cover for driving the rotary cover to rotate relative to the casing. The resilient plate includes a fixing portion fixed on the inner side of the casing, a driving portion resiliently connected to the fixing portion and the rotary cover for driving the rotary cover to rotate relative to the casing by deflection relative to the fixing portion, and a stopping portion disposed on the driving portion for stopping a tongue of a plug as the plug passes through the opening to connect with the socket, so as to fasten the plug.