Cord operated roman shade

Abstract

A roman shade of the present invention is operated by a cord to fold and unfold it. The cord is connected with a second device to be attracted by a first device provided on a valance adjacent to a bottom rail. The second device and the first device will separate when the cord is pulled with strength greater than a magnetic force between second device and the first device to avoid the cord dropping down and winding around neck or other body parts of the kids nearby.

1 . A roman shade, comprising:
 a shade member having a top rail, a bottom rail, and a valance with opposite ends connected to the top rail and the bottom rail; and   a cord assembly having a positioning unit provided on the shade member adjacent to the top rail, a first device provided on the shade member adjacent to the bottom rail, a second device magnetically attracted by the first device, and at least a cord with an end fastened to the second device and an opposite end passing through the positioning unit for manipulation to fold and unfold the valance.   
     
     
         2 . The roman shade as defined in  claim 1 , wherein the cord assembly further includes a flexible device surrounding the second device. 
     
     
         3 . The roman shade as defined in  claim 1 , wherein at least one of the first device and the second device is a magnet. 
     
     
         4 . The roman shade as defined in  claim 1 , wherein the second device has a through hole for the cord to pass through and tie a knot, a recess on a side thereof around an end of the through hole to receive the knot of the cord, and the second device has the side with the recess contacting the first device. 
     
     
         5 . The roman shade as defined in  claim 1 , wherein the positioning unit of the cord assembly includes two reels provided on the top rail and two stoppers beside the reels respectively, the cord includes a left cord and a right cord passing through spaces between each pair of the reel and the stopper to form an operating section respectively, the second device includes a left second device connected to the left cord and a right second device connected to the right cord, and the first device includes a left first device and a right first device to magnetically attract the left second device and the right second device respectively. 
     
     
         6 . The roman shade as defined in  claim 5 , wherein the cord assembly further includes a weight with a magnet or a magnet attractive device connected to the operating sections of the left cord and the right cord to be attracted by the first device when the valance is folded. 
     
     
         7 . The roman shade as defined in  claim 5 , wherein the cord assembly further includes a connector connected to the operating sections of the left cord and the right cord, a rope with an end fastened to the connector, and a weight having a magnet or a magnet attractive device, connected to a distal end of the rope to be attracted by the first device when the valance is folded. 
     
     
         8 . The roman shade as defined in  claim 1 , wherein the positioning unit of the cord assembly includes at least a reel and a driving device that the cord winds around the reel, and the driving device rotates the reel. 
     
     
         9 . The roman shade as defined in  claim 8 , wherein the driving device includes a spring and a transmission unit connecting the spring and the reel that the spring rotates the reel through the transmission unit. 
     
     
         10 . The roman shade as defined in  claim 1 , wherein the valance of the shade member is provided with a plurality of couplers, each of which has a guiding portion and a gap at an end of the guiding portion that the cord passes through the coupler and is able to move along the guiding portions and leaves the couplers via the gaps.