lever 2 clockwise as indicated by the arrow in fig6 into connecting groove 11 of connecting piece 1 pin 3 moves along positioning groove 112 toward curved surface 116 when pin 3 passes convex point 117 on curved stop surface 114 convex point 117 and the surrounding material are elastically deformed to a certain extent as a result pin 3 is embedded and engaged in the positioning space for pin 3 between convex point 117 on positioning groove 112 and curved surface 116 in this way top lever 2 and connecting piece 1 are assembled and movably connected in one embodiment the connecting position between top lever 2 and connecting piece 1 indicates a connecting position for the tent frame in a folded state to unfold the tent top lever 2 is rotated downward depicted as a clockwise rotation according to the arrow in fig6 so that the inner end of top lever 2 rests against bump stopper 118 as depicted in fig3 in this way tent frame top levers 2 and connecting piece 1 can be unfolded as shown in fig3 and the top frame connecting structure thereby enters the unfolded state although the invention has been described in connection with specific embodiments variations of these embodiments will be obvious to those of ordinary skill in the art for example more or fewer connecting grooves 11 and top levers 2 than described may be arranged on connecting piece 1 bump stopper 118 may be moved to a position adjacent to positioning grooves.