Safety device for quickly releasing control ropes of roman shades

Abstract

A safety device for Roman shades includes multiple loop members connected to each of the folding lines on the shade and multiple restriction members are connected to multiple loop members. Each restriction member includes multiple extensions which spirally wrap to each other so as to define an opening therebetween. Multiple engaging members are connected to the loop members located at a lower end of the shade. Multiple control ropes each have a top end connected to the top box of the Roman shade and the lower end of each control rope extends through the openings of the restriction members and is connected to a collar. The collars can be disengaged from the engaging members. When the control ropes are pulled laterally, the collars are disengaged from the engaging members and the control ropes are disengaged from the extensions of the restriction members.

1 . A Roman shade comprising:
 a top box;   a shade composed of multiple fabric sheets and a top end of the shade connected to the top box and multiple pocket portions formed along a first side of the shade, the pocket portions each being defined by folding upward a part of the fabric sheet and fixing the part along a folding line, each pocket portion defining a passage which extends transversely through the shade, rods extending through the passages, multiple loop members connected to each of the folding lines;   multiple restriction members connected to the multiple loop members and each restriction member including multiple extensions which spirally wrap to each other so as to define an opening therebetween;   multiple engaging members connected to the loop members located at a lower end of the shade;   multiple control ropes each have a top end connected to the top box and the lower end of each control rope extending through the openings of the restriction members, and   multiple collars connected to the lower ends of the multiple control ropes and engaged from the engaging members, when the control ropes are pulled laterally, the collars are disengaged from the engaging members and the control ropes are disengaged from the extensions of the restriction members.   
     
     
         2 . The Roman shade as claimed in  claim 1 , wherein each of the restriction members includes a ring which includes a first elongate slot and each of the loop members includes a hole, the restriction members are connected to the loop members by extending through holes and the first elongate slots to each other, each restriction member includes a first extension and a second extension which spirally wraps to the first extension, the opening is defined between the first and second extensions, a spiral gap is defined between the first and second extensions. 
     
     
         3 . The Roman shade as claimed in  claim 2 , wherein the first extensions each include a first bending distal end and the second extensions each have a second bending distal end. 
     
     
         4 . The Roman shade as claimed in  claim 1 , wherein each of the engaging members includes a connection portion which includes a second elongate slot and each of the loop members includes a hole, the engaging members are connected to the loop members by extending through holes and the first elongate slots to each other, each connection portion includes two first protrusions and two second protrusions which are located between the two first protrusions, the collars are engaged between the first and second protrusions. 
     
     
         5 . The Roman shade as claimed in  claim 4 , wherein each of the first protrusions includes a first stop extending from an inside thereof. 
     
     
         6 . The Roman shade as claimed in  claim 4 , wherein each of the second protrusions includes a second stop extending from an outside thereof which faces the first protrusion next to the second protrusion. 
     
     
         7 . The Roman shade as claimed in  claim 6 , wherein each of the second projections includes a first projection extending from an inside thereof which faces the other second protrusion. 
     
     
         8 . The Roman shade as claimed in  claim 6 , wherein each of the second projections includes a second projection extending from the outside thereof and located at a lower end of the second stop corresponding thereto. 
     
     
         9 . The Roman shade as claimed in  claim 6 , wherein the second protrusions are longer than the first protrusions. 
     
     
         10 . The Roman shade as claimed in  claim 6 , wherein the connection portion, the first protrusions and the second protrusions of each of the engaging members are integrally made or plastic material. 
     
     
         11 . The Roman shade as claimed in  claim 6 , wherein a distance between the first protrusion and the second protrusion adjacent and a distance between the two adjacent second protrusions are different.