The compression mechanism of the terminal is a mechanism for creating a pressure between the conductor and the conductive strip. Only a sufficient pressure is required to ensure a lower contact resistance to form a good connection, so the reliability of the compression mechanism directly affects the wire connection The good or bad. For screw-type terminals, screws, copper pillars and press plates are important components that make up the compression mechanism; for threaded terminals, springs or spring cards are important components of the compression mechanism. No screw type terminal, the compression mechanism is mainly spring, so the choice of spring is essential to ensure that there is sufficient contact pressure, to ensure that will not be too much damage to the wire, the spring terminal is more reliable non-threaded terminal. Into the line, you can push the block or screwdriver to suppress the spring, into the line, the release of the spring, the use of spring back to tightly force the wire to suppress, resulting in adequate contact pressure, and then use the spring edge of the wire strangled wire, So that it will not loose or artificially pull out.
During the entire assembly process, it is necessary to withstand the high temperature of the preheating zone and the temperature of the terminal body through the wave soldering. Flux must not affect the terminals, must be easy to remove, can not have any residue. The entire assembly process must be clean with water. Preheat temperatures often reach 100 ° C or higher, and crest temperatures up to 280 ° C are not uncommon. Perforated solder pins must be accurately positioned, fit in size, evenly placed, and have good solderability, which is conducive to the insertion and welding.
In the whole assembly process must withstand the heat generated by the high temperature impact, in the welding of the main use of infrared preheating and convection preheating heat conduction to the welding pin and tin plate interface to melt solder paste. Contact resistance to poor welding resistance, starting the motor or line short circuit, the high current to touch. Head welding and can not be released, which is easier to melt welding silver. AC contactor of the main contact should be used to resist the welding capacity of silver-based alloys, such as silver iron, silver and so on.
In the optical fiber communication (transmission) link, in order to achieve different modules. The need for a flexible connection between the equipment and the system, there must be a device that can be disassembled (optically) connected between the fiber and the optical fiber so that the optical path can be transported on the desired channel to achieve and complete the intended or desired purpose And requirements, to achieve this function is called the connector device. The terminals are precisely interfaced with the two end faces of the fiber so that the light energy emitted by the emitted fiber can be coupled to the receiving fiber to the maximum extent possible and minimizes the impact on the system due to its involvement in the optical link, This is the basic requirement for fiber optic terminals.
The technician in the terminal using the operation, will pay attention to whether the clamping mechanism is closed, because it will directly affect the wire connection is good or bad. But this knowledge in the majority of technicians will have some doubts, this article for the terminal of the compression mechanism to do a simple analysis. Terminals Magnetic system in the column without air gap, remanence is too large. The remnant magnetic gap at the mouth of a part of the file, so that the gap is 0.1-0.3mm, or in the coil in parallel with a 0.1uF capacitor. Enabled contactor core surface has oil or grease after a period of use. The core surface rust-proof grease wipe clean, iron core surface requirements flat, but not too light, or easy to cause delayed release.