Patent ID: 7926540

Claim:
A controlling shaft for controlling a blind provided on a beam of the blind, comprising: a blind; and a transverse shaft; and a plurality of shaft controlling units provided on said transverse shaft, in such a manner that when said transverse shaft rotates, said plurality of shaft controlling units can synchronously rotate with said transverse shaft, wherein each of said shaft controlling units comprises a plurality of rotating members, wherein when said shaft controlling unit rotates with said transverse shaft, said rotating members of each of said shaft controlling units move in different pace, and with a synchronous movement of said shaft controlling units with said transverse shaft, wherein particular points on an outer side of respective plurality of rotating members of said shaft controlling unit at same level move to different extents, wherein an outer shape of said plurality of rotating members approximates to a column, and a longitudinal axis of said plurality of rotating members that approximates to column is coincident with a longitudinal axis of said transverse shaft, so that said rotating members rotate stably when rotating with said transverse shaft, wherein a circumference of an outer surface of each two rotating member are different from each other, so that when said plurality of shaft controlling units rotate synchronously with said transverse shaft to drive said plurality of rotating members to rotate, said plurality of rotating members turn the same angle, wherein particular points on an outer side of respective plurality of rotating members of any shaft controlling unit at same level move to different extents, wherein each of said rotating members has a cord retaining hole provided thereon wherein said blind comprises a cord lifting unit, wherein said cord lifting unit comprises a plurality of lift cords, each of said lift cords has two controlling cords and a plurality of fixing cords, wherein two controlling cords are corresponding to each other and are fixed to a respective rotating member, and a distance is between said two controlling cords, wherein said fixing cords are provided between said two controlling cords from top to bottom, and a distance is between two neighbor fixing cords, wherein each said fixing cord comprises two or more transverse cords, and two neighbor transverse cords defines a fixing cavity, wherein a space between two neighbor fixing cavities is larger than two neighbor controlling cords.