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Basic Structural Components of Connectors

1. Contacts: Connectors are the core parts of the electrical connection function. Generally, the contact pair is composed of positive contacts and negative contacts, and the electrical connection is completed by the insertion of negative and positive contacts.


Positive contact parts are rigid parts, and their shapes are cylindrical (circular insert needle), square (square insert needle) or flat (insert piece). Positive contacts are usually made of brass and phosphorus bronze.


Negative contact parts, namely sockets, are the key parts of contact pairs. They rely on the elastic deformation of the elastic structure when they are inserted into the pin to form a close contact between the elastic force and the positive contact parts and complete the connection. There are many kinds of sockets, such as cylindrical (slot, contraction), tuning fork, cantilever beam (longitudinal slot), folded (longitudinal slot, 9-shaped), box (square slot) and hyperbolic linear spring sockets.


2. Insulator: Insulator is also often called base or insert. Its function is to arrange the contacts according to the required position and spacing, and to ensure the insulation performance between contacts and between contacts and shell. Good insulation resistance, voltage resistance and easy processing are the basic requirements for selecting insulating materials to be processed into insulators.


3. Shell: also known as shell, is the outer cover of connectors. It provides mechanical protection for the internal insulation mounting plate and pins, and provides the alignment of plugs and sockets when they are plugged in, thereby fixing the connectors to the equipment.


4. Appendix: Appendix is divided into structural appendix and installation appendix. Structural accessories such as clamps, positioning keys, positioning pins, guide pins, connection rings, cable clamps, sealing rings, gaskets, etc. Installation accessories: such as screw, nut, screw, spring coil, etc. Most of the accessories have standard parts and general parts.


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