The utility model relates to a plug. An if plug of structure is extracted to modularization electrodynamic type, including plug shell and inner tube, the inner tube is equipped with ejector pin mounting hole and inner tube portion locating hole, be equipped with a supporting protrusion in the ejector pin mounting hole, the 2nd supporting protrusion and the 3rd supporting protrusion, it stretches out the ejector pin of stating the plug shell and stretches out the spring towards participating in the place side to be equipped with ejector pin and drive top in the ejector pin mounting hole, the ejector pin includes the interlude, the briquetting is come directly towards and pressed, the interlude is equipped with elastic stop block, be equipped with the stopper on the surface of top, the top is equipped with top portion locating hole, be equipped with locating pin and top portion electro -magnet in the top portion locating hole, be equipped with inner tube portion electro -magnet in the inner tube portion locating hole. The utility model has the advantages of during the storage occupation space little, can not result in that socket sleeve is tired, the one hand can be extracted and themodularization, it needs two problems that the hand carries out the operation to have solved when extracting the plug with the mode of going on protecting to the socket.