US Patent 11877685 Window shade

A window shade may include a shade, and each of a top portion and a bottom portion thereof has a mount bar. The shade is installed into a sliding unit through the mount bar on the top portion of the shade, and the mount bar on the bottom portion of the shade is coupled with a weight track. The mount bars on the top portion and the bottom portion of the shade are adapted to enable the shade to horizontally install on a top track of a window curtain and also to enable the weight of the weight track to be evenly distributed on the bottom portion of the shade, thereby smoothing the operation of the shade.