Structure principle of board to board connector
The basic structural parts of the board to board connector are as follows: contact, insulator, shell and accessories
Contacts is the core part of the connector to complete the electrical connection function. Generally, the contact pair is composed of a positive contact and a negative contact, and the electrical connection is completed by inserting and closing the negative and positive contacts.
The shape of the positive contact is cylindrical (round pin), square cylindrical (square pin) or flat (insert piece), which is a rigid part,. The positive 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 deformation of the elastic structure when it is inserted with the pin to produce the elastic force and form close contact with the positive contact part to complete the connection.
There are many types of jack structure, including cylinder type (split slot, necked), tuning fork type, cantilever beam type (longitudinal slot), folding type (longitudinal slot, 9-shaped), box type (square jack), hyperboloid spring jack and so on.
Insulator is also often called base or mounting plate. Its function is to arrange the contacts according to the required position and spacing, and ensure the insulation performance between the contacts and between the contacts and the shell. Good insulation resistance, voltage resistance and processability are the basic requirements for selecting insulating materials to be processed into insulators.
The shell, also known as the shell, is the outer cover of the board to board connector, which provides mechanical protection for the built-in insulating mounting plate and pin, and provides alignment when the plug and socket are inserted, so as to fix the board to board connector to the equipment.
Accessories are divided into structural accessories and installation accessories. Structural accessories such as snap ring, positioning key, positioning pin, guide pin, connecting ring, cable clamp, sealing ring, gasket, etc. Install accessories such as screws, nuts, screws, spring coils, etc. Most of the accessories are standard parts and general parts.
