连接器的基本结构件有①接触件；②绝缘体；③外壳（视品种而定）；④附件。接触件（contacts） 是连接器完成电连接功能的核心零件。一般由阳性接触件和阴性接触件组成接触对，通过阴、阳接触件的插合完成电连接。阳性接触件为刚性零件，其形状为圆柱形（圆插针）、方柱形（方插针）或扁平形（插片）。阳性接触件一般由黄铜、磷青铜制成。

A brief introduction to the structure principle of the connector

Connectors are made up by contacts, insulator, housing and other accessories. Contacts are the core part of completing electric connection, which consist of yin and yang contacts. Yang contacts were inflexible parts including round pin, square pin or plug. And  yang contacts were almost made up of brass or phosphor bronze.