Browdy and Neimark, PLLC
Dual-torsion-spring cord rolling device for window blind without exposed pull cord
A dual-torsion-spring cord rolling device includes driving and transmission units. The driving unit has first and second torsion spring gears engaged with each other, a first torsion spring connecting the first and second torsion spring gears, a wheel adjacent to the first torsion spring gear, and a second torsion spring connecting the second torsion spring gear and the wheel. The transmission unit has first and second transmission gears rotatable synchronously by the driving of the second torsion spring gear, and two lift transmission cords attached to the first and second transmission gears respectively.
SHEEN WORLD TECHNOLOGY CORPORATION
E B E
E06B B65H E06B
inventional inventional additional
Hung-Hao Ming-Che
Chen Tsai