Embodiments of the present invention relate to a socket, comprising: a seat body including two insertion holes allowing two pins of a plug to insert respectively; wherein, an individual protective door movable member is disposed for each of the insertion holes in the seat body, the protective door movable member is configured in a way that when no pin of a plug is inserted into the insertion holes, the protective door movable members close corresponding insertion holes, and when the pins of the plug are inserted into the insertion holes, the protective door movable members are driven to move along a defined trajectory to open the corresponding insertion holes to allow the pins of the plug to extend into the insertion holes, and wherein movement of the protective door movable members along the defined trajectory makes the movement trajectory of at least a portion of the protective door movable members different from the movement trajectory of another portion of the protective door movable members. The socket according to the present invention has a flat and pleasant appearance and occupies little internal space of the socket.