Water leakage preventing mechanism of femerell

The invention discloses a water leakage preventing mechanism of a femerell. A skylight seat frame is connected to a hole position of the femerell, a skylight fixed frame is connected to each of two ends of the skylight seat frame, an outwards convex arc-shaped spherical surface is arranged on the outer side of the upper part of each skylight fixed frame, and a plane is arranged on the arc-shaped spherical surface. The upper end of an electric expansion piece is connected with a skylight movable frame through a hinge pin lug bolt, the upper part of the electric expansion piece extends outwards, the extended end part bends downwards and is provided with a downwards open rectangular groove, and a sealing ring is fixed in the rectangular groove, extends out of the groove and presses against the plane on the arc-shaped spherical surface at the upper end of each skylight fixed frame. An adhesive is arranged around the upper part of the skylight movable frame to ensure that the skylight movable frame is connected wi