A rotary mechanism for car seat

The utility model discloses a rotary mechanism for car seat, including two traces and coupling assembling, the interval sets up around two traces, the terminal surface of two traces forms the ultrasion vibration sysytem who supplies the car seat installation jointly, the both ends of two traces all are equipped with coupling assembling, coupling assembling include connecting seat and connection piece, the one end pin joint of connection piece is on the connecting seat, and the other end of connection piece is equipped with the perforation that supplies the trace to pass, perforation inner wallepirelief is equipped with a plurality of connection teeth, in a plurality of connection teeth are used for stretching into the outer wall of trace with the extruded mode when the tip cross -under oftrace is in perforating to make connection piece and trace rigid coupling. The utility model discloses a rotary mechanism for car seat, when its trace was connected with the connection piece, a plurality of connection teeth c