Window shade system and operational method thereof

A window shade system for maintaining a retractable shade within a window frame, the system comprising:

• a window shade mounted at an upper end of the window frame;
• the shade extending a width between a first side and a second side;
• the shade extending a length between an upper end and a lower end, wherein the shade is deployed and retracted between an open position and a closed position;
• a first side channel positioned adjacent the first side of the shade, mounted to the window frame, the first side channel having a first end wall and a pair of first opposing sidewalls forming a first open chamber;
• a pair of first inward flanges on the pair of first opposing sidewalls that project inwardly toward each other to define a first slit therebetween that extends in a longitudinal direction and opens laterally allowing insertion of the window shade within the first side channel;
• a second side channel positioned adjacent the second side of the shade, mounted to the window frame, the second side channel having a second end wall and a pair of second opposing sidewalls forming a second open chamber;
• a pair of sec inward flanges on the pair of second opposing sidewalls that project inwardly toward each other to define a second slit therebetween that extends in a longitudinal direction and opens laterally allowing insertion of the second side of the window shade within the second side channel;
• and
• a plurality of bead structures attached along an edge of the first side and the second side of the shade, wherein each of the plurality of the bead structures is sized at a thickness that is greater than the width of the slit so as to be retained within the first and second side channels while permitting sliding movement of the window shade along the length of each of the two side channels.