The development of modular connectors is mainly based on the continuous upgrading of electronic equipment performance and the pursuit of miniaturization. The modular connectors that are easy to install and easy to maintain can greatly increase the value of the equipment, enabling the combination of a large number of different transmission types in a single manual or automatic docking system. Modular connectors enable robust mechanical construction using sturdy metal or composite sheaths, and the accepted terminal and cable types have flexible modular pins.