Brief introduction to the structure principle of the connector the basic structural parts of the connector are: (1) contact; ② Insulator; ③ Shell (depending on Variety); ④ Annex. Contacts is the core part of the connector to complete the electrical connection function. Generally, the contact pair is composed of a positive contact and a negative contact, and the electrical connection is completed by inserting and closing the negative and positive contacts. The positive contact is a rigid part, and its shape is cylindrical (round pin), square cylindrical (square pin) or flat (insert piece). The positive contacts are generally made of brass and phosphor bronze

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