Connector, also known as connector, is an electronic component used to connect electrical components. It is mainly used for power or signal transmission and is widely used in industry and life. Connectors generally consist of external connectors and internal wiring terminals. Connectors are generally insulators, such as plastic materials, which are divided into male end and female end for connection and fixation. Terminals are conductors, which transmit signals or power supplies. Many of them are coated, such as tin plating, gold/silver plating, etc., which play the role of conduction.