Basic structure and components of electrical connector for connection pin and socket

　　Electrical connector shell refers to the shell, connecting nut and tail accessories of plug and socket. The shell is mainly used to protect the internal parts of electrical connector, such as insulator and contact body (the general name of pin and socket). The upper positioning keyway ensures that the plug and socket are positioned. Connecting nuts shall be used for connection and separation of plug socket. The tail accessories are mainly used to protect the wire and contact body from damage and to fix the cable. The shell also has a certain electromagnetic shielding effect. The shell is usually made of aluminum alloy (machining, cold extrusion, die casting). Steel shell is widely used in glass sealing and high temperature electrical connector.

　　The insulator is mainly composed of pin insulator, socket insulator, interface sealing body and wire sealing body. The utility model is used to maintain the pin socket at the setting position, and at the same time to make the contact bodies and the contact bodies and the shell be electrically insulated from each other. Nylon ties are sealed by insulator and interface sealing body to improve the environmental performance of electrical connector.

　　In order to adapt to the high temperature, low temperature and flame retardant of the products, ensure the stability and reliability of the geometric dimensions of the parts. Most of the thermosetting molding materials are made of insulating plastics. The interface sealing body and sealing body are molded with silicone rubber.

　　Pin jack is the general name of contact body, which can be divided into welding type, crimping type and winding type, which can realize circuit connection. Pin socket is the key component of electrical connector, which has a direct impact on the reliability of electrical connector. Most of the pin jacks are made of elastic copper alloy with good electrical conductivity, and the appearance is silver plated and gold-plated to achieve low contact resistance and anti-corrosion effect.

　　The structure features are: environment resistance, bayonet type (fast) connection, multiple key positions (anti wrong insertion), crimping connection of contact body and wire, (single take-off and delivery is convenient for fault handling).

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