Terminology commonly used in connectors
1. Connectors: Separable elements (except adapters) that are normally mounted on cables or equipment for electrical connection of transmission line systems.
2. Radio Frequency Connector: Connector used in the range of radio frequency.
3. Video: Radio waves in frequency range from 3HZ to 30MHZ.
4. Radio Frequency: Radio waves in the frequency range of 3,000 HZ to 3,000 GHZ.
5. High Frequency: Radio waves in the frequency range of 3 MHZ to 30 MHZ.
6. Coaxial: The inner conductor is supported by dielectrics, and the minimum internal reflection coefficient can be obtained in the frequency range of measurement.
7. Tri-coaxial: A transmission line consisting of three concentric conductors with common axes and mutual insulation.
Grade 8: Connector's level of mechanical and electrical precision, especially in terms of prescribed reflectivity.
9. Universal Connector (Level 2): A connector manufactured with the widest allowable size deviation (tolerance), but still guaranteeing the minimum required performance and compatibility.
Note: The requirement of reflection coefficient can be specified or not.
10. High Performance Connector (Level 1): A kind of connector which specifies the limit value of reflection coefficient according to frequency variation. Usually, the dimension tolerance is not stricter than that of the corresponding level 2 connector. However, when it is necessary to ensure that the connector meets the requirement of reflection coefficient, the manufacturer has the responsibility to choose the stricter tolerance.
11. Standard Test Connector (Level 0): A precisely manufactured type of connector for measuring the reflectivity of Level 1 and Level 2 connectors. The errors caused by the measurement results can be neglected.
Note: Standard test connectors are usually part of different types of adapters, and the connection between adapters and precision connectors forms part of the test equipment.
12. Sealing
12.1 Sealed Connector: Connector with gas, moisture or liquid sealability requirements.
12.2 Barrier Seal: Prevent gas, moisture or liquid from entering the inner of the connector housing along the axis.
12.3 Panel Seal: Prevent gas, moisture or liquid from entering the seal between the fixed or adapter housing and panel through the installation hole.
Note: Seals are usually supplied as stand-alone products.
12.4 Plug Face Seal: Prevent gas, moisture or liquid from entering the interface of a pair of Plug Connectors.
12.5 Gas Seals: Seals that meet the requirements of test Qk stipulated in IEC60068-2-17 Basic Environmental Test Rules Part 2: Test-Test Q: Seals.
Basic Structure Composition of Connector
The basic structural parts of connectors are: (1) contacts; (2) insulators; (3) enclosures (depending on the type); and (4) accessories.
1. Contacts are the core parts of connectors to complete the electrical connection function. Generally, the contact pair is composed of positive contacts and negative contacts, and the electrical connection is completed by the insertion of negative and positive contacts.
Positive contact parts are rigid parts, and their shapes are cylindrical (circular insert needle), square (square insert needle) or flat (insert piece). Positive contacts are usually made of brass and phosphorus bronze.
Negative contact parts, namely sockets, are the key parts of contact pairs. They rely on the elastic deformation of the elastic structure when they are inserted into the pin to form a close contact between the elastic force and the positive contact parts and complete the connection. There are many kinds of sockets, such as cylindrical (slot, contraction), tuning fork, cantilever beam (longitudinal slot), folded (longitudinal slot, 9-shaped), box (square slot) and hyperbolic linear spring sockets.
2. Insulator insulator is also often called base or insert. Its function is to arrange the contacts according to the required positions and spacing, and to ensure the insulation performance between contacts and between contacts and outer shells. Good insulation resistance, voltage resistance and easy processing are the basic requirements for selecting insulating materials to be processed into insulators.
3. The shell, also known as the shell, is the outer cover of the connector. It provides mechanical protection for the insulation mounting plate and pin inside, and provides alignment when plugs and sockets are inserted, thereby fixing the connector to the equipment.
4. The appendix is divided into structural appendix and installation appendix. Structural accessories such as clamps, positioning keys, positioning pins, guide pins, connection rings, cable clamps, sealing rings, gaskets, etc. Installation accessories such as screw, nut, screw, spring coil, etc. Most of the accessories have standard parts and general parts.