Principle of construction of board-to-board connectors

Structural principle of board-to-board connectors The basic structural parts of board-to-board connectors are as follows: contacts, insulators, housings, and accessories contacts (contacts) are the core parts of the connector to complete the electrical connection function. Generally, a contact pair is composed of a male contact and a female contact, and the electrical connection is completed by inserting the female and male contacts. The shape of the male contact is cylindrical (round pin), square cylindrical (square pin) or flat (tab) and is a rigid part. The male contacts are generally made of brass and phosphor bronze. The contact part is the socket, which is the key part of the contact pair. It relies on the elastic structure to deform elastically when it is inserted into the pin to generate elastic force to form close contact with the positive contact part and complete the connection. There are many types of jack structures, including cylindrical type (splitting groove, shrinking notch), tuning fork type, cantilever beam type (longitudinal slotting), folding type (longitudinal slotting, figure 9 shape), box-shaped (square jack) and hyperboloid wire spring jack, etc.

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The insulator is also often called a base or mounting plate. Its function is to arrange the contacts at the required position and spacing, and to ensure the insulation performance between the contacts and between the contacts and the housing. Good insulation resistance, voltage withstand performance and easy processability are the basic requirements for selecting insulating materials to be processed into insulators. The housing, also known as the outer shell, is the outer cover of the board-to-board connector. It provides mechanical protection for the built-in insulating mounting plate and pins, and provides alignment of the plug and socket when plugged in, thereby securing the board-to-board connector to the device. Accessories are divided into structural accessories and installation accessories. Structural accessories such as clamping rings, positioning keys, positioning pins, guide pins, coupling rings, cable clamps, sealing rings, gaskets, etc. Installation accessories such as screws, nuts, screws, spring coils, etc. Most accessories have standard parts and general parts.

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