Window covering

A window covering comprising a fixed rail, a covering material, a lifting cord and a winding mechanism, wherein the covering material is positioned under the fixed rail, and the winding mechanism comprises a rotating member and a reel positioned in the fixed rail;

• wherein the lifting cord has one end fixed on the bottom of the covering material, and another end thereof is connected to the reel after passing through the covering material and the fixed rail;
• the reel is driven to wind up or release the lifting cord, in order to drive the covering material to move toward the fixed rail to fold, or to move away from the fixed rail to unfold;
• characterized in that:
• the rotating member passes through the reel, and selectively rotates independently from the reel, or to rotate along with the reel in the same direction synchronously;
• the winding mechanism further comprises a stopper which is operably pivoted relative to the rotating member;
• a block is positioned in the fixed rail, and is stationary relative to the fixed rail;
• when the rotating member rotates independently from the reel, the stopper is driven to pivot, and is protruded from a surface of the rotating member, and the stopper would abut against the block to stop the rotation of the rotating member.