Abstract: A cordless window blind structure comprises a head rail having an accommodating channel into which a cord-winding control device with an operational cord attached thereto and a fixed seat are mounted at both end sides with a movable seat situated there-between. The operational cord is also fixed to one side of the movable seat. Multiple lift cords mounted to the corresponding positions of a blind body and a bottom rail are guided into the accommodating channel and divided to extend from either the upper or lower side of a guiding post of the fixed and movable seats respectively and wind onto multiple guiding elements, permitting the operational cord to link in movement to the lift cords wound onto the movable and fixed seats. Therefore, the bottom rail is simply pushed or pulled by hands to easily and accurately adjust the blind body into a desirable collected or expanded position thereby.

Abstract: A Venetian blind slat control mechanism comprises a set of first string ladders suspended between a head rail and a bottom rail of a Venetian blind for holding a plurality of equally spaced slats thereon before respectively fixed onto a pair of adjusting seats that, having an adjusting shaft mounted thereon, are accommodated at both ends of the head rail therein to tilt the slats into different angles thereby. A lift cord is applied to sequentially thread through cord passages of each slat before wound and suspended from a first pulley seat adapted at one end of the head rail to raise or lower the slats thereby. Between the adjusting seats inside the head rail is situated a positioning seat with a set of guide sliding members accommodated at both sides thereof in linking movement with a linkage actuating plate controlled by an operational cord that is wound and suspended from a second pulley seat adapted at the other end of the head rail.

Abstract: A single cord activation mechanism for collecting a window blind, especially a mechanism which uses a single cord to collect slats of a window blind, is primarily composed of a release shaft with a larger diameter which is connected coaxially with an activation shaft. The entire structure is located in a top rail longitudinally. The release shaft provides for winding a lifting cord for opening and closing the slats. The activation shaft provides for winding an activation cord through an arresting member. A linear length of releasing operation can be enlarged by increasing the diameter of activation shaft, and a height of operation can be safely and easily acquired according to opening and closing the slats with the single activation cord.

Abstract: A pull cord activation passage mechanism for a window blind, which is particularly used for providing a reaction length of a longer curvature in a passage of activating a pull cord for driving curtains of a horizontal blind, and for enabling the pull cord to enter into related sliding members in a nearly perpendicular direction, in order to enable an arresting member to be close to a first pull cord seat, comprises primarily a bending pulley located between a first and a second seats for providing a turning back of the first pull cord. An open ring is located on the seat, for providing sliding members to adjust corresponding to a pulling angle of the pull cord, thereby avoiding impedance in a slant direction, and enabling a smooth operation to the pull cord.

Abstract: A slat control mechanism for Venetian blinds includes a control assembly, guide sliding assemblies, a linkage drawing plate, and abutting members wherein first rope ladders are suspended between upper and lower beams of a Venetian blind for the abutting position of a plurality of slats in an equal space thereto and are located to adjusting seats with adjusting rods attached thereto so as to tilt the slats into different angles thereby. A lift cord is sequentially led through each slat thereof and wound through a pulley seat adapted at one end of the upper beam to extend downwards there-from so as to lift or expand the slats thereby.

Abstract: A cordless blind structure comprises a blind, and a plurality of control seats and guide tracks wherein the blind has a blind body fixedly attached to the underside of a headrail, a plurality of connecting elements, each having a guide block to be adapted to a guide groove of each guide track, fixed to both lateral side edges of the blind body, and a holding weight portion attached at the bottom edge thereof. The control seat, fixed above the holding weight portion thereon, has a set of crisscrossed positioning groove and pivoting groove appropriately defining therein for the accommodation of a switch element having a transverse T-shaped retaining block to be mounted into the guide groove of each guide track for sliding movement or abutting location therein, permitting the blind body to be stably collected or easily expanded without the use of any lift cords for achieving safer application thereby.