Curtain

Abstract

A curtain includes a first rail, a second rail spaced apart from the first rail, a drape disposed between the first and second rails, at least one curtain control device and two cord guiding devices. The curtain control device is mounted on the first rail for folding upwardly and unfolding downwardly the drape, and includes two cords and a cord controlling unit that provides force for the cords. Each cord has a pull segment coupled to the second rail and extending through the first rail and the drape. The cord guiding devices are mounted on the first rail, each including a guiding wheel unit for the pull segments of each cord to wind thereover, and a guide rod for the pull segment of each cord to abut against.

What is claimed is: 
     
         1 . A curtain comprising:
 a first rail;   a second rail spaced apart from said first rail;   a drape disposed between said first and second rails;   at least one curtain control device mounted on said first rail for folding upwardly and unfolding downwardly said drape, and including two cords and a cord controlling unit that provides a winding force for said cords, each of said cords having a pull segment coupled to said second rail and extending through said first rail and said drape; and   two cord guiding devices mounted on said first rail, each of said cord guiding devices including a guiding wheel unit for said pull segment of one of said cords to wind thereover, and a guide rod for said pull segment of said one of said cords to abut against, said guide rod being disposed between said guiding wheel unit and said cord controlling unit.   
     
     
         2 . The curtain as claimed in  claim 1 , comprising at least two of said curtain control devices. 
     
     
         3 . The curtain as claimed in  claim 2 , wherein said guiding wheel unit of each of said cord guiding devices includes a first guiding wheel and a second guiding wheel connected coaxially to said first guiding wheel. 
     
     
         4 . The curtain as claimed in  claim 3 , wherein each of said cord guiding devices further includes a wheel holder mounted on said first rail, said wheel holder having two holder walls disposed along a direction parallel to a length direction of said first rail, said first and second guiding wheels being disposed between and held by said holder walls. 
     
     
         5 . The curtain as claimed in  claim 4 , wherein said first guiding wheel of said guiding wheel unit includes a first shaft mounted on one of said holder walls of said wheel holder, and two first annular discs protruding radially from said first shaft, said first shaft defining an insert hole that opens towards said second guiding wheel, said second guiding wheel including a second shaft that is mounted on the other one of said holder walls of said wheel holder, and two second annular discs that protrudes radially from said second shaft, said second shaft including an insert segment that extends into said insert hole of said first guiding wheel. 
     
     
         6 . The curtain as claimed in  claim 5 , wherein each of said holder walls of said wheel holder is formed with an engaging groove, said first shaft of said first guiding wheel including a first mounting section rotatably received in said engaging groove of said one of said holder walls, said second shaft of said second guiding wheel including a second mounting section rotatably received in said engaging groove of said other one of said holder walls. 
     
     
         7 . The curtain as claimed in  claim 4 , wherein said first guiding wheel of said guiding wheel unit includes a first shaft mounted on and extending between said holder walls of said wheel holder, and two first annular discs protruding radially from said first shaft, said second guiding wheel including a tubular body sleeved around on said first shaft of said first guiding wheel, and two second annular discs protruding radially from said tubular body. 
     
     
         8 . The curtain as claimed in  claim 4 , wherein said guide rod of each of said cord guiding devices is mounted on said wheel holder and extends along a direction transverse to the length direction of said first rail. 
     
     
         9 . The curtain as claimed in  claim 8 , wherein said first rail is formed with two first passage holes for said pull segments of said two cords of each of said curtain control devices to respectively extend therethrough, each of said cord guiding devices further including a cord-encircling rod mounted on said wheel holder, said cord-encircling rod including an encircling section that extends above a corresponding one of said first passage holes. 
     
     
         10 . The curtain as claimed in  claim 9 , wherein said cord controlling unit of each of said curtain control devices includes two cord winding wheels for winding said cords respectively, and an elastic reel mounted on said cord winding wheels for providing a biasing force to lift said cords.