Plastic shell connectors are mainly used in automotive, military, electronics, communication, instrumentation, medical and other fields. It is mainly used to connect the plastic shell of the product, and its products are widely used in various industries. The plastic shell connector is usually composed of a connector, an insulating sleeve and a waterproof sleeve. It is mainly used to connect the electronic components of the product, and can protect the electronic components from external shocks and dust.

接插件是连接电子线路的定位接头，有插件和接件构成，一般状态是可以完全分离的。接插件与开关的本质区别在于前者只有插入拔除两种状态，而开关可以在本体上实现电路的转换。接插件的接触对存在固定的对应关系，因此，接插件也可以叫连接器。