US Patent 10178896 Press control key ring

A press control key ring includes a split ring defining an opening between two opposite ends thereof, and a locking module including an inner casing for the insertion of the two opposite ends of the annular wire rod and having a mounting hole on the middle of the top wall thereof, an elastic member mounted in the inner casing with one end thereof secured to an inner bottom wall of the inner casing, a press block mounted in the mounting hole and supported on the opposite end of the elastic member, and an outer casing sleeved onto the inner casing and having an insertion hole on the middle of the top wall thereof for the insertion of the press block.