Patent ID: 6854500
Filing Date: 2005-02-15
Classification: E06B

Abstract:
1. A foldable window blind structure comprising: (a) a horizontal beam having a positioning device; (b) a curtain cloth having an upper edge mounted at a bottom portion of the horizontal beam; (c) a plurality of support rods mounted apart on the curtain cloth, wherein the each of the support rods includes a back rod and a front rod, and one side of the back rod is provided with an engaging slot, and a top and bottom side of the back rod is provided correspondingly with an engaging slot, and the front rod has a side protrusion having engaging rib for mounting the curtain cloth at the engaging slot of the back rod; (d) a plurality of suspension rings spaced apart and mounted on corresponding position on the back rod, and one side of the suspension rings has a fastening section for mounting onto the engaging slot, and the other side of the suspension rings is provided with an insertion hole; and (e) a pulling rope having one end mounted to the suspension rings, and the other end of the pulling rope passing through the suspension rings at various support rods and surrounding a top portion of the horizontal beam, and passing out from a positioning device and vertically mounted at a front side of the curtain cloth, allowing the positioning device to control elevating and lowering of the curtain cloth; wherein a top portion of the horizontal beam is provided with a channel having a plurality of through holes passing through a bottom section for passage of the pulling rope, and the positioning device has a cavity passing through a bottom section of the horizontal beam and the channel and the cavity is provided with a fixed pulley and a free engaging wheel and one lateral wall is provided with a slanting face and a bottom section of the cavity has a peg which restricts the engaging wheel at the cavity, the pulling rope passing through from a bottom thereof to the suspension rings to the through holes and surrounding the channel of the top portion of the horizontal beam and through the engaging wheel, and is mounted at one side of a front face of the curtain cloth, the suspension rings are formed from bending with steel wire having an end portion being bent to two fastening sections for mounting of the engaging slot of the back rod, and a center section is bent side way to form a ring for passage of the pulling rope.