The basic structural parts of the connector are ① contacts; ② insulator; ③ shell (depending on the variety); ④ accessories.

1. Contacts (contacts) is the connector to complete the electrical connection function of the core parts. Generally by the positive contact and the negative contact with the composition of the pair, through the yin and yang contact to complete the electrical connection.

The positive contact is a rigid part with a cylindrical (round pin), square (square pin) or flat (insert). Positive contacts are generally made of brass, phosphor bronze.

The negative contact, the jack, is the key part of the contact pair. It relies on the elastic structure to be elastically deformed when engaged with the pin to form a resilient force in close contact with the positive contact to complete the connection. (Vertical groove), folding type (longitudinal slot, 9-shaped), box-shaped (square jack), the shape of the jack, As well as hyperbolic thread spring jack and so on.

2. The insulator insulator is also often referred to as a base or insert, and its function is to position the contacts in the desired position and spacing and to ensure the insulation between the contacts and between the contacts and the housing The Good insulation resistance, withstand voltage performance and ease of processing is the choice of insulation materials into the insulator of the basic requirements.

3. The housing, also known as a shell, is the housing of the connector, which provides mechanical protection for the built-in insulation mounting plate and pins and provides alignment of the plug and socket when the connector is secured to the device.

4. Accessories Accessories Attachments and installation accessories. Structural accessories such as the collar, positioning keys, positioning pins, guide pins, connecting rings, cable clamps, seals, gaskets and so on. Installation accessories such as screws, nuts, screws, coils and so on. Accessories are mostly standard parts and common parts.