Patent ID: 6213188
Filing Date: 2001-04-10
Classification: E06B

Abstract:
A cord control device in a combination with a Venetian blind which includes an elongated horizontal top housing, a plurality of horizontal slats suspended downwardly from the top housing one above another, a bottom rail disposed below the slats, a pair of pulleys disposed spacedly in the top housing, and at least one first control cord and at least one second control cord, each of the control cords passing through the top housing and through the slats and having a first end portion fastened to the bottom rail, and a second end portion which extends out of the top housing, said cord control device comprising:a hollow mounting seat mounted removably in the top housing between the pulleys, and having a bottom end, a top end, a roller-mounting space between said top and bottom ends, and an elongated rack disposed in said roller-mounting space;a pair of stationary rollers journalled in said roller-mounting space one above the other proximate to said elongated rack, the first control cord passing slidably over a lower one of said stationary rollers, the second control cord passing slidably over and between said stationary rollers;a movable pinion disposed movably in said roller-mounting space and passing slidably over by the second end portions of the first and second control cords, said pinion being movable to a first position by virtue of swinging action of the first and second control cords in a first direction, where the first and second control cords can slide over said pinion to permit raising and lowering of the slats, and a second position by virtue of swinging action of the first and second control cords in a second direction opposite to the first direction, where said pinion is clamped between said rack and the lower one of said stationary rollers so that the firs and second control cords are be clamped between said pinion and the lower stationary roller, thereby preventing raising and lowering of the slats; anda stop unit for preventing removal of said pinion from said roller-mounting space in said mounting seat.