1. The origin of industrial plugsIndustrial plugs are very common electrical accessories in factories and manufacturing industries. Socket A socket into which one or more circuit wires can be inserted, through which various wires can be inserted to facilitate connection with other circuits. Embedded socket is embedded in the integrated communication cabinet, which is a power supply device that provides basic DC power for communication and data equipment in the same cabinet. It also has certain universality. A switch is arranged between the weatherproof socket resistor and the electromagnetic switch; the fuse and the electromagnetic switch are connected with a power line; the normally open switch of the electromagnetic switch is arranged on the power line; and the normally open switch of the electromagnetic switch is connected with the jack. Any electrical appliance needs a plug in normal operation. Industrial plugs and sockets become "bridges" between electrical appliances and power supplies. With the invention of electricity and the appearance of electric appliances, there is an urgent need for a device to transmit electricity to electric appliances. But before the appearance of industrial plugs, people directly connected the power supply and electrical appliances with wires. However, with the emergence of a large number of electrical appliances, frequent binding is very inconvenient, and the connection between electrical appliances and people's lives is also very unsafe. This old-fashioned "tied together" connection can easily lead to electric shock accidents. Therefore, people put forward the requirements of safe, fast, convenient and simple connection. Under the pressure of this environment, industrial plugs and sockets came into being.2. Standard development of industrial plugs and socketsThe plugs and sockets used in the early days were all very simple in structure and different in size. Even industrial plugs produced in the same country and city appeared, and they could not be plugged into their sockets in another city in this country. Therefore, in order to unify the standards and facilitate everyone to use industrial plugs and sockets, many countries in the world have successively formulated their own internal unified standards for plugs and sockets. China made the first plug and socket GB 1002-67 in 1967; For example, Britain could not meet BS546:1950 standard in 1950.3. Development history of industrial plug industryFrom the beginning, industrial plugs and sockets only meet the demand of electricity consumption, but with the change of people's demand, plugs and sockets are constantly developing. In the early days, many bakelite production enterprises in China were producing plugs and sockets. At that time, all plugs and sockets were made of black phenolic resin powder. Later, with the improvement of people's living standards, the requirements for beauty and safety became higher and higher, and people put forward higher requirements for industrial plugs and sockets.4. The emergence of various plugs and socketsAccording to the requirements of different industries for sockets, such as preventing children's fingers and other items from entering the socket hole and causing contact at home, we need to install a protective shell on the socket; There is a lot of water in the bathroom, so the power socket has waterproof function; In order to fit the socket into the overall style of the family, there are sockets of various colors on the wall; In order to meet the special requirements of large-scale industries for sockets and sockets, industrial plugs and sockets have also appeared.Now there are many remote control, energy-saving and intelligent plugs and sockets. Such as remote control timing function of socket, remote control function of smart plug, power socket, ground socket, explosion-proof socket and other products.5. The emergence of personalized plugs and socketsPlug and socket has developed from a single power connection to a multifunctional and beautiful combination, and people have put forward higher and higher requirements for its safety and convenience. The appearance of these new plugs and sockets indicates that they will develop rapidly in the future.