The four basic structural parts of the automotive connector: 1. The contact piece is the core part of the electrical connection function of the automotive connector. The contact pair is generally composed of a male contact and a female contact, and the electrical connection is completed through the insertion of the female contact and the male contact. The male contact is a rigid piece with a cylindrical shape (circular pin), square cylindrical shape (guide) or flat cylindrical shape (insert piece). Contacts are generally made of brass and phosphor bronze. The female contact or receptacle is the critical part of the contact pair. It relies on the elastic deformation of the elastic structure when inserting the pin to generate elastic force and form a close contact with the male contact to complete the connection. There are many kinds of jacks, such as cylindrical (split type, telescopic type), tuning fork type, cantilever type (longitudinal groove type), folding type (longitudinal groove type, figure 9), box type (square jack), hyperbolic spring jack. 2. The shell, also known as the shell, is a type of automotive connector cover that provides mechanical protection for the built-in insulating mounting plate and pins, and provides alignment of the plug and socket to secure the connector to the device. 3. Insulators and insulator connectors are often referred to as automotive connector bases or mounting plates. Its function is to arrange the contacts according to the required position and spacing, so as to ensure the insulation performance between the contacts and between the contacts and the shell. Good insulation resistance, withstand voltage and processing performance are the basic requirements for selecting insulating materials for processing 1 automotive connectors. 4. Accessories are divided into structural accessories and installation accessories. Structural accessories, such as retaining rings, positioning keys, positioning pins, guide pins, connecting rings, cable clamps, sealing rings, gaskets and other accessories. Mounting accessories such as screws, nuts, screws, spring coils, etc. Most accessories have standard parts and common parts. It is these four basic structural parts that make the car connector play the role of a bridge and operate stably. Most accessories have standard parts and common parts. It is these four basic structural parts that make the car connector play the role of a bridge and operate stably. Most accessories have standard parts and common parts. It is these four basic structural parts that make the car connector play the role of a bridge and operate stably.