Combination of electrical plug connector and matching electrical socket connector

A combination of electrical plug connector and matching electrical socket connector, comprising an electrical plug connector assembly comprising a plug connector and a buckle assembly, and an electrical socket connector, wherein:

• said plug connector comprising a circuit board, a holder base and a housing, said holder base comprising an accommodating space for accommodating said circuit board, a docking portion bilaterally extended from a front side thereof and a mounting surface formed on a top surface thereof at a rear side relative to said docking portion, said housing comprising a locating space for accommodating and positioning said holder base and two perforations bilaterally provided on an upper surface thereof,
• said buckle assembly is pivotally positioned between said holder base and said housing, said buckle assembly comprising a pressing surface placed on said mounting surface, two support arms respectively extended from two opposite lateral sides of said pressing surface in the same direction, a hook portion protruding upwards from a suspending front end of each said support arm and two supporting spring leaves supported on said holder base in such a manner that when said pressing surface is pressed, said supporting spring leaves are elastically deformed and said hook portions of said two support arms are shifted downward by a distance at said perforations,
• wherein, said holder base further comprises two positioning structures respectively formed on two opposite lateral sides of said mounting surface for pivotal positioning of said buckle assembly, and each said positioning structure of said holder base comprises a pivoting portion;
• said buckle assembly further comprises two rotating portions respectively formed on opposing rear ends of said two support arms outside said pressing surface and respectively coupled to said pivoting portions of said positioning structures of said holder base of said plug connector;
• said electrical socket connector comprising a socket portion for said docking portion of said plug connector to be docked to form an electrical connection, and two hook holes bilaterally located on a top surface of said socket portion for said hook portions on said two support arms to be snapped into position.