| 摘要 |
<p>PURPOSE: A dual roll blind which includes a screen, a winding rod, a rotary shaft, a gear, a drive wheel, and a slide drive tool, is provided to open and close a roll screen and to control the transmission of the roll screen by using a drive chain. CONSTITUTION: A dual roll blind comprises a first screen, a second screen, a first winding rod(31), a second winding rod(32), a first rotary shaft(13), a second rotary shaft(14), a first gear(23), a second gear(24), a drive wheel(50), and a slide drive tool. The first screen and the second screen respectively include a shading part and a light-transmitting part. The first winding rod and the second winding rod respectively reel the first screen and the second screen. The first rotary shaft and the second rotary shaft are combined with the first winding rod and the second winding rod, respectively. The first gear and the second gear are combined with the first rotary shaft and the second rotary shaft to rotate the first winding rod and the second winding rod, respectively. The drive wheel is driven to a drive chain(51) and transfers the torque of the drive chain to the first gear and winding rod. The slide drive tool receives the torque of the drive wheel and slides the first winding rod in the longitudinal direction of the first rotary shaft.</p> |
