OPENING AND CLOSING MECHANISM FOR FRONT AND REAR LEG GROUPS OF FRAME AND CHILD SAFETY SEAT

The invention provides a folding and unfolding mechanism for front and rear leg assemblies of a frame and a child safety seat, and belongs to the field of child seats. The folding and unfolding mechanism comprises a folding and unfolding control assembly and a front-rear leg rotating assembly. The front-rear leg rotating assembly comprises a rotating shaft arranged on a seat body and used for rotatably connecting a front leg assembly to the seat body, a rear leg assembly supporting rod used for connecting a rear leg assembly to the seat body, and a rear leg assembly rotating rod arranged on the front leg assembly and used for connecting the rear leg assembly to the front leg assembly, so that the rear leg assembly can rotate reversely when the front leg assembly rotates around the rotating shaft. The child safety seat comprises a seat body, a front leg assembly hinged to the seat body, a rear leg assembly hinged to the front leg assembly, and the folding and unfolding mechanism for front and rear leg assemblies of a frame. According to the folding and unfolding mechanism of the invention, the rear leg assembly can be folded reversely when the front leg assembly rotates to be folded, that is, the front leg assembly and the rear leg assembly are folded on two sides of the seat body, so that the problem of the prior art that the seat body cannot be stably clamped on the front and rear leg assemblies because the front and rear leg assemblies are folded on the same side is solved.