Adaptor and adaptor assembly using same

The invention relates to an adaptor and an adaptor assembly using same. The adaptor comprises an adaptor housing. The adaptor housing is provided with an adaptor socket contact piece and an adaptor socket locking structure. The adaptor housing is further provided with an adaptor plug contact piece and an adaptor plug locking structure. The adaptor is characterized in that the adaptor housing is provided with a seal cooperation portion in seal plug-in arrangement with a corresponding connecting sleeve between the adaptor socket locking structure and the adaptor plug locking structure. The invention provides the adaptor having a waterproof function and the adaptor assembly using the adaptor.