Although the circular connector is not big, its structure is quite complex, the basic structure is cylindrical, and has a circular interpolation surface, its main components are shell, contact parts, insulators, attachments and so on. Here's a good introduction to the basic components.

1. Shell

The shell, also known as the shell, is the outer cover of circular 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.

2. Contacts

Contacts are the core parts of circular connectors for electrical connection. 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 contacts are rigid, and their shapes are cylindrical (circular insert), square (square insert) or flat (insert). Positive contacts are usually made of brass and phosphorus bronze. Negative contact parts, i.e. 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 close contact with the positive contact parts and complete the connection. There are many kinds of sockets, such as cylindrical (slot, contraction), tuning fork, cantilever (longitudinal slot), folded (longitudinal slot, 9-shaped), box (square slot) and hyperbolic linear spring.

3. Insulators

Insulators are also often referred to as base or insert. Their function is to arrange the contacts according to the required positions and spacing, and to ensure the insulation performance between contacts and between contacts and outer shells. Good insulation resistance, voltage resistance and processability are the basic requirements for selecting insulating materials to be processed into insulators.

4. Annex

The accessories are divided into structural accessories and installation accessories. Structural accessories such as clamps, positioning keys, positioning pins, guide pins, connection rings, cable clamps, sealing rings, gaskets, etc. Installation accessories such as nails, mothers, rods, coils, etc. Most of the accessories have standard parts and general parts.