Basic knowledge of electronic connectors

Update:08-12-2018
Summary:

The basic structural components of the electrical conne […]

The basic structural components of the electrical connector include:

1.Contact

The contact is the core part of the connector to complete the electrical connection function. The contact pair is generally composed of a male contact and a female contact, and the electrical connection is completed by the insertion of the female and male contacts.

The positive contact is a rigid part, commonly referred to as a pin, which is cylindrical (round pin), square (square pin) or flat (tab). The positive contacts are generally made of brass or phosphor bronze. In order to improve their electrical conductivity, surface gold plating and silver plating are often performed.

The negative contact, that is, the jack, is a key component of the contact pair. It relies on the elastic structure to elastically deform when it is inserted into the pin, and generates an elastic force to form a close contact with the male contact to complete the connection. There are many types of jacks, such as cylindrical (groove, neck), tuning fork type, cantilever beam type (longitudinal slotted), folded type (longitudinally slotted, 9-shaped), box-shaped (square jack) And a double-curved wire spring jack.

The jack of the electrical connector product mainly adopts a single-blade double-curved wire spring jack, which is referred to as a wire spring hole. The wire spring hole is a kind of jack with high contact reliability in the international electrical connector contact couple. It has the characteristics of small contact resistance, soft insertion and removal, anti-vibration, impact resistance, long life, etc., and can maintain stable contact performance in a harsh environment and fail.

2. Insulator

Insulators, also commonly referred to as bases or inserts, serve to position the contacts in the desired position and spacing and to ensure insulation between the contacts and between the contacts and the outer casing. Good insulation resistance, withstand voltage performance and ease of processing are the basic requirements for the selection of insulating materials into insulators.

3. Housing

The housing, also known as the shell, is the connector cover that provides mechanical protection for the built-in insulated mounting plate and pins, and provides alignment when the plug and socket are mated, and locks the plug, which in turn The connector is attached to the device.

4. Accessories

Accessories are divided into structural accessories and mounting accessories. Structural accessories such as collars, positioning keys, locating pins, guide pins, coupling rings, cable clamps, seals, gaskets, etc. Install accessories such as screws, nuts, screws, coils, etc. The accessories are mostly standard and general.

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