Pull cord structure of Roman blind

Abstract

A pull cord structure of Roman blinds includes an upper beam of a Roman blind having a pull cord fixing seat mounted at both lateral sides therein respectively for locating a first pull cord and a second pull cord thereby, and a transparent blind body attached at the underside thereof wherein a plurality of blind pieces, each of an identical width and proper length and having a tubular tunnel disposed at the bottom edge thereon for the location of two counterweight bars therein, are equidistantly sewed to the front side of the transparent blind body from top to bottom thereof, and at mutual seaming joints thereof are respectively provided with symmetrical retaining lugs with hoops attached thereto for the first pull cord to be sequentially led there-through till fixed to the bottommost hoops thereof. At the rear middle section of the tubular tunnel of each blind piece is disposed a pulling lug for a linking rope branched from the second pull cord to be securely attached thereto. Thus, in addition to the first pull cord applied to fold or unfold the Roman blind thereby, the second pull cord is drawn to synchronically actuate the linking ropes, lifting upwards the pulling lugs and the middle section of the tubular tunnels therewith with both lateral sides of the tubular tunnels tilted downwards into slopes by the two counterweight bars adapted therein to figure an inverted V-shaped pattern at the bottom edge of the blind pieces for special visual effects and artistic variations so as to increase the overall beauty and unique style of the Roma blind thereof.

1 . A pull cord structure of Roman blinds, including an upper beam of a Roman blind that is equipped with a pull cord fixing seat mounted at both lateral sides therein respectively for locating a first pull cord and a second pull cord thereby wherein a transparent blind body having an elongated tunnel sewed at the bottom edge for a counterweight member to be retained therein is fixedly attached at the underside of the upper beam thereof, and a plurality of blind pieces, each of an identical width and proper length and having a tubular tunnel disposed at the bottom edge thereon for the location of two counterweight bars therein, are equidistantly attached to the front side of the transparent blind body from top to bottom thereof; at mutual seaming joints of the blind pieces and the transparent blind body thereof are respectively provided with symmetrical retaining lugs with hoops attached thereto for the first pull cord to be sequentially led through the hoops from top to bottom till fixed to the bottommost ones thereof; thus, the first pull cord is drawn to lift upwards the bottommost hoops thereof and sequentially actuate the other hoops to raise upwards till abutted against the neighboring hoops disposed at the immediate seaming joint thereof, folding up the transparent blind body and the blind pieces therewith to suspend downwards in multi-layers; the present invention also being characterized by that, 
 a pulling lug being fixed at the rear middle section of the tubular tunnel of each blind piece, and a through hole being disposed at the middle section of each seaming joint thereof for the second pull cord to pass there-through from the front side of the transparent blind body till fixed to the pulling lug of the bottommost blind piece thereof; a plurality of linking ropes, each of a proper length and equidistantly branched from the second pull cord at preset positions, are correspondingly matched to the blind pieces and precisely fixed to the pulling lugs disposed at the bottom edge thereof; in operation thereof, the second pull cord is drawn downwards to synchronically actuate the linkage ropes, lifting upwards the pulling lugs and the middle section of the tubular tunnels therewith with both lateral sides of the tubular tunnels tilted downwards into slopes by the two counterweight bars adapted therein to figure an inverted V-shaped pattern at the bottom edge of the blind pieces thereby; thus, the transparent blind body is partially revealed through the up-raised blind pieces thereof for light to come indoors there-through, achieving special visual effects as well as artistic variations thereof of the Roma blind thereof.    
     
     
         2 . The pull cord structure of Roman blinds as claimed in  claim 1  wherein the linking ropes and the second pull cord are securely fixed via sewing, integral weaving, or thermal-welding operation thereof