Lift cord concealable venetian blind lift control mechanism

Details Lift cord concealable venetian blind lift control mechanism Lift cord concealable venetian blind lift control mechanism

E - Fixed Constructions

06

B

E06B 9/322 (2006.01) E06B 9/32 (2006.01)

Patent

CA 2385093

A lift cord concealable Venetian blind lift control mechanism is constructed to include a base having two hollow screw rods axially aligned at two sides and selectively mounted in the top or bottom rail of a Venetian blind, a revolving rod inserted through the hollow screw rods, a spring member, which provides a torsional force to the revolving rod, two bobbins respectively threaded onto the screw rods for synchronous rotation with the revolving rod. The left and right lift cords of the Venetian blind each have one end connected to the bottom or top rail and the other end fastened to the bobbin such that when the bottom rail of the Venetian blind lifted or lowered by an external force, the bobbins are synchronously rotated to wind up or let off the lift cords; when the external force disappeared, the bobbins are immovable, keeping the bottom rail in position.

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