What is the connector like? Do you know anything?？

What is the connector like? Do you know anything?

1. Function of connector

Connectors mainly provide convenient electrical plug connection in electronic products and power supply equipment. Widely used in electronic equipment, greatly improving the production and maintenance efficiency of electronic products. Due to the wide application of plug connection, the reliability of connection and the resistance of contact point are increasingly important to the quality of products. Therefore, it is necessary to have a comprehensive understanding of the performance of the connectors used in order to use the connectors reasonably and correctly.

2. Connector structure and product classification

(1) Basic structure of connector

Contact parts. It is the core part of the connector to complete the electrical connection function. Generally, it is composed of an anode contact and a cathode contact. The electrical connection is completed by inserting the female contact and the male contact.

The anode contact is a rigid part with cylindrical (round pin), square cylindrical (square pin) or flat (insert) shape. Anode contacts are usually made of brass and phosphor bronze.

The cathode contact, namely the socket, is the key part of the contact pair. With the help of the elastic structure, when the contact pin is inserted, the elastic force is generated to form close contact with the male contact to complete the connection. There are many types of jack structures, including cylindrical (slotted, constricted), tuning fork, cantilever (longitudinal slotted), folding (longitudinal slotted, "9"), box-shaped (square jack), and double-sided wire spring jack.

Insulator. Insulators are also called bases or mounting plates. Its function is to arrange the contacts according to the required position and spacing 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 processed into insulators.

Enclosure. The housing, also known as the housing (depending on the type), is the housing of the connector. It provides mechanical protection for the built-in insulated mounting plate and pins, and provides alignment when the plug and socket are inserted, so as to fix the connector to the device.

enclosure. Accessories are divided into structural accessories and installation accessories. Retaining ring, locating key, locating pin, guide pin, connecting ring, cable clamp, sealing ring, gasket and other accessories. Install accessories such as screws, nuts, screws and spring coils. Most parts have standard parts and general parts.

(2) Classification of connector products

Technically, there are only two basic ways to classify connector product categories: circular and rectangular (cross section) according to shape and structure; According to the working frequency, it is divided into low frequency and high frequency (bounded by 3MHz).

According to the above classification, the coaxial connector is circular, and the printed circuit connector is rectangular (historically, the printed circuit connector is indeed separated from the rectangular connector to form a class), while the current popular rectangular connector has a trapezoidal cross section, which is close to rectangular. The frequency division of low frequency and high frequency bounded by 3MHz is basically the same as that of radio wave.