Basic knowledge of electronic connectors

The basic structure of the electrical connector includes: 1, contact; 2, insulator; 3, shell; 4, accessories. 1. contact (contacts) is the connector to complete the core parts of the electrical connection function. Generally by the positive contact and negative contact components composed of contact pairs, through the negative and positive contact parts of the insertion and completion of the electrical connection. Positive contacts for rigid parts, generally known as pins, the shape of the cylindrical (round pins), square cylindrical (square pins) or flat (inserts). Positive contacts are generally made of brass, phosphor bronze, in order to improve its electrical conductivity, often gold-plated surface, silver-plated treatment. Negative contact parts that jack, is the key parts of the contact pair, it relies on the elastic structure in the elastic deformation occurs with the pins when the elastic deformation and produce elastic force and the positive contact parts to form a close contact, complete the connection. There are many types of jack structures, including cylindrical (split groove, indented), tuning fork, cantilever beam type (longitudinal slots), folded (longitudinal slots, 9-shaped), box (square jacks), and hyperbolic wire reed jacks, etc. The wire reed jack is the key part of the contact pair. Wire reed hole is a kind of jack with extremely high contact reliability in the contact couple of the international electrical connector. It has a small contact resistance, soft insertion and extraction, vibration resistance, shock resistance, long life, etc., and can maintain stable contact performance in harsh environments and failure. 2. insulator Insulator is also often referred to as the base (base) or mounting plate (insert), which serves to make contact with the required location and spacing, and to ensure that the contact between the contact parts and contact with the shell of the insulating properties of the shell. Good insulation resistance, voltage performance and ease of processing is the basic requirements for the selection of insulating materials processed into an insulator. 3. shell also known as shell (shell), is the connector's outer shell, it is mounted inside the insulated mounting plate and pins to provide mechanical protection, and to provide plugs and sockets plugged in the alignment, and the plug seat locking, which will be the connector is fixed to the equipment. 4. accessories Annexes are divided into structural annexes and mounting accessories. Installation accessories. Structural accessories such as rings, locating keys, locating pins, guide pins, coupling rings, cable clamps, seals, gaskets and so on. Installation accessories such as screws, nuts, screws, spring rings and so on. Most of the accessories are standardized and general-purpose parts.

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