Plug, socket and connector

The utility model discloses a plug, a socket and a connector, and the plug comprises a first protection housing, a plug body which is disposed in the first protection housing and is used for the adaptive connection with a socket part, and a lock part which is disposed at one end of the plug body and is used for achieving the locking of the plug body and the socket. One end of the first protective shell is provided with a jack for plugging a socket; the lock catch part comprises a locking piece arranged at the socket and a buckling part arranged on the locking piece; the pressing part is used for pushing the buckling part to move so as to realize relative displacement control of the buckling part and the first protective shell in the direction perpendicular to the axial direction of the socket; and the elastic piece is arranged between the pressing part and the first protective shell. The structure is simple, the weight of the product is light, and the requirements of aviation application environments are met.