Mechanical linkage device applied to jewelry

The invention discloses a mechanical linkage device applied to jewelry, and belongs to the technical field of jewelry modeling, the mechanical linkage device comprises a fixing ring, the bottom of thefixing ring is fixedly connected with a connecting rod, the outer side wall of the top and the outer side wall of the bottom of the connecting rod are in threaded sleeve connection with an upper nutand a lower nut respectively, and the upper nut is rotatably connected with a rotating part a; the upper nut is provided with a rotating groove a corresponding to the rotating piece a, the bottom of the rotating piece a is rotationally connected with a plurality of decorative pieces a, the lower nut is rotationally connected with a rotating piece b, and the top of the rotating piece b is rotationally connected with a plurality of decorative pieces b. According to the invention, the inclination angles of the decorative pieces a and the decorative pieces b can be adjusted by rotating the upper nut and the lower nut as re