Patent ID: 7487817
Filing Date: 2009-02-10
Classification: E06B

Abstract:
1. A non-pull cord operable window blind structure, comprising a head rail with an accommodating channel defining thereon wherein the bottom surface of the accommodating channel has multiple cord passages disposed thereon and both end sides thereof are respectively secured a cord-winding control device and a fixed seat; besides, a movable seat is mounted to situate between the cord-winding control device and the fixed seat and allowed to freely slide in the accommodating channel thereof; a blind body is attached to the underside of the head rail at one end edge and fixed to a bottom rail at the other end edge thereof; multiple lift cords are mounted to the corresponding positions of the blind body and the bottom rail, and are respectively guided to pass through the cord passages of the head rail; the fixed seat and the movable seat are respectively equipped with multiple guiding elements for the winding of each lift cord thereon to achieve guiding purpose thereby; in addition, an operational cord is attached to the cord-winding control device at one end and fixed to an insert block at the other end thereof wherein the insert block is firmly mounted to an insert cavity of a positioning block disposed at one side of the movable seat thereof, permitting the operational cord to correspondingly move in linkage to the lift cords wound onto the movable seat and the fixed seat thereof; therefore, the bottom rail is simply pushed or pulled by hands to loosen or tighten the lift cords wound on the movable seat, and actuate the movement of the operational cord therewith to form a state of counterbalance there-between, permitting a user to easily and smoothly adjust the blind body into a desirable collected or expanded position thereby, wherein the fixed seat and the movable seat are respectively equipped with a set of bottom and upper boards to form a winding groove there-between for the mounting of the guiding elements thereon; the positioning block of the movable seat is situated to protrude at one side of the bottom board thereon, and an opening edge is disposed at one end of the positioning block to communicate with the insert cavity thereof; besides, both side walls of the insert cavity thereof have a set of coupling recesses symmetrically indented thereon.