Abstract: An adapter includes a connector main body, a housing, elastic members, a locking member and an elastic clamping member, wherein the connector main body includes an outer conductor, an inner conductor and an insulator; the housing is arranged on the connector main body in a sleeved manner; a limiting space is formed between the housing and the connector main body; one end of the locking member is movably limited in the limiting space, and the other end of the locking member is provided with extrusion portions; the elastic members are at least partially located in the limiting space; one end of each of the elastic members abuts against a side wall of the limiting space, and the other end of the elastic member abuts against the locking member.

Abstract: A board-to-board radio frequency coaxial connector includes an adapter, a clamping socket including a first outer conductor, a first inner conductor, and a first insulator, and a fixed socket including a second outer conductor, a second inner conductor, and a second insulator. The clamping socket and the fixed socket are respectively arranged at two ends of the adaptor. The adapter includes a third outer conductor, a third inner conductor, and two third insulators. The two third insulators are respectively arranged at two ends of the third inner conductors and sleeved on an outside of the third inner conductor. Each of the two third insulators includes a body portion and an auxiliary portion. The body portion includes a second groove recessed inwardly from its outer circumferential surface. Two ends of the third outer conductor are respectively electrically connected to the first and second outer conductors.