Power supply socket used to connect to the city power provide the alternating current,device to make household electrical appliances and portable small equipmentelectricity can be used. The power socket is a female joint slots or concave hole, used to make a power plug rod or coin shaped protrusion insertion, to the power to electricalconduction through the plug. The general socket are designed to plug the non same specification can not be inserted into the rod, there will be the prominent part of the socket, with concave hole on the plug.