Patent ID: 7690415
Filing Date: 2010-04-06
Classification: E06B,Y10T

Abstract:
1. A window covering lifting control apparatus comprising at least: a holding unit which has a bracket holding two rollers and a bottom side which has a first spacer and a second spacer formed thereon that are spaced apart from each other; the first spacer having two first slots, corresponding to the two rollers, that are diverging downwardly from the center of the first spacer toward the lateral sides of the said first spacer, and at least one strut mounted on the outer surface of said first spacer that is coupled with a spring; the second spacer having two second slots, parallel to the two first slots, that are also diverging downwardly from the center of the second spacer toward the lateral sides of the second spacer, also corresponding to said two rollers; a locating set which includes two gears, two locating rods, two locating heads and a spring assembly having a plurality of springs; the two gears having, respectively, an axial through hole and being mounted between the first spacer and the second spacer in corresponding with said slots, the two locating rods having an expanded end at one end with the other end running through the opposing first and second slots and the through holes of the two gears, the two locating heads being fastened, respectively, to the other end of the two locating rods opposing the expanded end, the springs of the spring assembly fastening, respectively, the two locating rods and the two locating heads; and a pushbutton, which is movably coupled on the strut of the holding unit, has a sleeve coupling with the spring, and a slant plate on the side facing the holding unit to slidingly engage the end surface of the two locating heads.