Abstract: A curtain drawstring structure may include an upper beam, a fixed unit, and a movable unit. The upper beam has a rail groove for a string hole, and a projecting rail is protrudingly disposed at a lower portion of the inner wall of each rail groove, and an evading space is used to separate the two projecting rails. Through the size difference of guiding wheels and steering wheels and the engagement of pressing rods and stepped slots of the fixed unit and movable unit, a retractable cord can be fully separated to avoid entanglement. The retractable cord can be simply wrapped on the guiding wheels and steering wheels to complete the installation process.

Abstract: A curtain drawstring structure may include an upper beam, a fixed unit, and a movable unit. The upper beam has a rail groove for a string hole, and a projecting rail is protrudingly disposed at a lower portion of the inner wall of each rail groove, and an evading space is used to separate the two projecting rails. Through the size difference of guiding wheels and steering wheels and the engagement of pressing rods and stepped slots of the fixed unit and movable unit, a retractable cord can be fully separated to avoid entanglement. The retractable cord can be simply wrapped on the guiding wheels and steering wheels to complete the installation process.

Abstract: A window treatment roll-up device has: a support base, a rotation base, at least two power springs, a braking member and a control wheel. The support base comprises a first shaft, a second shaft, a third shaft and a fourth shaft, the third shaft and the fourth shaft are engaged with each other, a controlling rope wrapped around the second shaft, the rotation base is jacketed onto the second shaft. The control wheel is disposed on the fourth shaft and configured to be wrapped by a rolling rope. The braking member has a first end and a second end, the first end is tapered such that the braking member is cone-shaped; a spiral slot connecting between the first end and the second end is disposed on a surface of the braking member. The first end of the braking member and the power spring both jacket onto the third shaft.

Abstract: A window treatment roll-up device has: a support base, a rotation base, at least two power springs, a braking member and a control wheel. The support base comprises a first shaft, a second shaft, a third shaft and a fourth shaft, the third shaft and the fourth shaft are engaged with each other, a controlling rope wrapped around the second shaft, the rotation base is jacketed onto the second shaft. The control wheel is disposed on the fourth shaft and configured to be wrapped by a rolling rope. The braking member has a first end and a second end, the first end is tapered such that the braking member is cone-shaped; a spiral slot connecting between the first end and the second end is disposed on a surface of the braking member. The first end of the braking member and the power spring both jacket onto the third shaft.