Venetian blind with concealed lift cords

#1. Field of the Invention

#The present invention relates to Venetian blinds and, more specifically, to a Venetian blind with concealed lift cords that keeps the lift cords from sight and from reach of children.

#2. Description of the Related Art

#FIG. 1 is a schematic drawing of a first embodiment of the present invention, showing the Venetian blind extended out.

#FIG. 2 is a sectional view taken along line 2-2 of FIG. 1.

#FIG. 3 is a schematic drawing corresponding to FIG. 1, showing the blind received.

#Referring to FIGS. from 1 through 4, a Venetian blind 10 is shown comprising a headrail 12 fixedly transversely fastened to the top side of the window W, the headrail 12 having two tension springs 14 bilaterally disposed on the inside in the middle, the tension springs 14 each having an inner end fastened to the inside of the headrail 12, a bottom rail 16 extended in transverse direction and spaced below the headrail 12, a number of slats 18 arranged in parallel between the headrail 12 and the bottom rail 16, a first side track 20A, a second side track 20B, a first lift cord 30A, and a second lift cord 30B.

#The side tracks 20A;20B are vertically fixedly fastened to the two opposite vertical lateral sides of the window W below the elevation of the headrail 21 and downwardly extended to a position lower than the elevation of the stool of the window W, each comprising a longitudinal sliding groove 22 facing each other. The two distal ends of the bottom rail 16 are respectively inserted into the inside the longitudinal sliding grooves 22 of the tracks 20A;20B. The lift cords 30A;30B are respectively bilaterally inserted through the slats 18, each having respective top and bottom ends respectively inserted into the inside of the headrail 12 and the inside of the bottom rail 16. After inserted into the inside of the headrail 12, the first ends (top ends) of the lift cord 30A;30B are respectively turned inwards toward the mid point of the headrail 12 and then respectively fixedly connected to the outer ends of the tension springs 14. After inserted into the inside of the bottom rail 16, the second end (bottom end) of the first lift cord 30A is turned rightwards out of the right end of the bottom rail 16 into the inside of the longitudinal sliding groove 22 of the second side track 20B and then extended downwards along the longitudinal sliding groove 22 of the second side track 20B and finally fixedly fastened to the bottom end of the longitudinal sliding groove 22 of the second side track 20B. After inserted into the inside of the bottom rail 16, the second end (bottom end) of the second lift cord 30B is turned leftwards out of the left end of the bottom rail 16 into the inside of the longitudinal sliding groove 22 of the first side track 20A and then extended downwards along the longitudinal sliding groove 22 of the first side track 20A and finally fixedly fastened to the bottom end of the longitudinal sliding groove 22 of the first side track 20A.

#By means of the aforesaid structure arrangement (the tilting control mechanism of the Venetian blind is of the known art and not within the scope of the claims of the present invention, no further detailed description on the tilting control mechanism is necessary), the tension force of the lift cords 30A;30B hold the bottom rail 16 in position, keeping the Venetian blind 10 in the corresponding extending position. When adjusting the elevation of the blind, the user needs only to directly move the bottom rail 16 with the hand to the desired elevation and then release the hand from the bottom rail 16.