The contact is the core component of the connector. It establishes an electrical connection between circuits through plugging, welding, or crimping, ensuring smooth transmission of current or signals. Most contacts used in connectors are elastic, facilitating a connection between elastic and rigid parts. The most widely used contact types are mainly the following five: Rigid pin and cantilever socket contact type; Rigid pin and wire spring socket contact type; Rigid pin and crown spring socket contact type; Rigid pin and claw spring socket contact type; Rigid socket and stranded wire pin contact type. When selecting contact structures, comprehensive consideration is given to the connector's use environment, electrical performance, and structural characteristics. The reasonableness of the contact structure design often determines the success or failure of the entire connector design.