U-shaped inward-folding rotating mechanism straight sliding groove bending

The invention discloses a U-shaped inward-folding rotating mechanism for straight sliding groove bending. The mechanism comprises a structure body; the structure body comprises two sets of rotating shafts; each rotating shaft comprises a rotating mechanism body; each rotating mechanism body comprises a first fixed frame and a second fixed frame; the first fixed frames and the second fixed frames are longitudinally distributed side by side; first rotating frames and second rotating frames which are transversely and symmetrically distributed are arranged between the first fixed frames and the second fixed frames; arc-shaped sliding grooves which are rotationally connected and two sets of symmetrically distributed fixed frame sliding columns are arranged on the opposite inner side edges of the first fixed frames and the second fixed frames respectively; straight sliding grooves and rotating frames sliding columns which are rotationally connected are respectively arranged at the rotationaljoints between the first rotating frames as well as the second rotating frames and the first fixed frames as well as the second fixed frames; the fixed frame sliding columns are in sliding fit with the interiors of the straight sliding grooves; and meanwhile the rotating frame sliding columns are in sliding fit with the interiors of the arc-shaped sliding grooves, that is, the straight sliding grooves limit the motion trail of the first rotating frames and the motion trail of the second rotating frames to achieve 0-180-degree bending rotation.