Abstract: A headrail for a window covering is constructed to include a base panel having a coupling groove longitudinally extended along a front long side thereof, two end caps respectively fastened to two distal ends of the base panel, and an ornamental panel. The coupling groove has a narrow top open width smaller than an inside width thereof. The ornamental panel has a top coupling flange curved from a top side thereof and defining with the ornamental panel a contained angle, and a top bearing portion formed of a bar protruded from the top coupling flange and engaged into the coupling groove of the base panel. The top bearing portion of the ornamental panel has a transverse width slightly smaller than the top open width of the coupling groove of the base panel.

Abstract: A combination window covering is constructed to include a headrail, a bottom rail, front and rear ladder tapes respectively vertically connected between the headrail and the bottom rail at front and rear sides, fabric slats arranged in parallel between the headrail and the bottom rail, each slat having two opposite long sides respectively embedded with a rib, which is fastened to the front and rear ladder tapes, fabric light screening flaps respectively suspended from the slats and forming a light screening face at the front side of the slats, and a control unit for operation by the user to lift or lower the bottom rail so as to further receive or extend out the slats, and to move the front ladder tapes and rear ladder tapes of the ladder tapes vertically in reversed directions so as to further tilt the slats.

Abstract: A vertical retractable blind. The blind includes a fixed headrail, a lifting rail vertically movable in the horizontal direction below the headrail, two positioning cords adapted to support the lifting rail at the desired elevation. The positioning cords each have a first end connected to the headrail and a second end respectively extended across the lifting rail and fixedly secured to a respective fixed point outside the lifting rail to provide a tension force to the lifting rail. A retractable blind body is connected between the headrail and the lifting rail and vertically extended out/received subject to vertical movement of the lifting rail.

Abstract: A control system for regulating light-shading status of a window blind assembly is disclosed to include a transmission mechanism and a driving device. The transmission mechanism includes a force receiving member having a receiving portion. The driving device has a force output member detachably connected to the receiving portion of the force receiving member. The receiving portion of the force receiving member is substantially a rod member having a coupling groove extended around a periphery near a bottom end thereof. The force output member has a receptacle connectable to the bottom end of the receiving portion of the force receiving member. The receptacle includes a spring arm having a protruding engagement portion for engaging the coupling groove of the receiving portion upon connection of the receptacle to the receiving portion of the force receiving member.

Abstract: A control system for regulating light-shading status of a window blind assembly is disclosed to include a transmission mechanism and a driving device. The transmission mechanism includes a force receiving member having a receiving portion. The driving device has a force output member detachably connected to the receiving portion of the force receiving member. The receiving portion of the force receiving member is substantially a rod member having a coupling groove extended around a periphery near a bottom end thereof. The force output member has a receptacle connectable to the bottom end of the receiving portion of the force receiving member. The receptacle includes a spring arm having a protruding engagement portion for engaging the coupling groove of the receiving portion upon connection of the receptacle to the receiving portion of the force receiving member.

Abstract: A window blind assembly control crank gear includes a top rod, an intermediate rod and a bottom rod pivoted to the intermediate rod. The top rod has a coupling block with a transverse pivot hole. The intermediate rod has a coupling lug including two upright sidewalls and two pivot holes respectively formed in the upright sidewalls and axially aligned. A fastener is passed through the pivot hole of the coupling block and the pivot holes of the coupling lug to pivotally secure the coupling block to the coupling lug between the upright sidewalls and to impart a pressure to the upright sidewalls against the coupling block for enabling the intermediate rod to be turned relative to the top rod and quickly positioned in an adjusted angular position.

Abstract: A safety window blind assembly formed of a headrail, a bottom rail, a plurality of slats, a blind supporting system, two lift cords, and a lift lock is disclosed to further include two cord stoppers respectively coupled to the lift cords and adapted to limit the moving distance of the lift cords relative to the lift lock and to further prevent a sudden dropping of the bottom rail upon failure of the lift lock. Each cord stopper has a center wire hole adapted to receive a part of one lift cord and two retaining grooves formed in the periphery thereof for retaining the part of the lift cord been inserted through the center wire hole.

Abstract: A laborsaving Venetian blind includes a headrail fixedly fastened to a top side of a window, a bottom rail spaced below the headrail, a set of slats, ladder tapes holding the slats in parallel between the headrail and the bottom rail, two laborsaving guides mounted in the bottom rail, each laborsaving guide having two rollers corresponding to front and rear sides of the slats, and two lift cords. Each lift cord has first end fixedly fastened to the headrail and a second end extending downwards from the headrail toward a front side of the bottom rail and then extending through the rollers of one laborsaving guide to a back side of the bottom rail and then extending upwards to the headrail for operation by the user.

Abstract: A cord stopper for use in slidably and detachably connecting a lift cord of a window blind assembly includes a first portion provided with a cord hole, a second portion having a free end close to the first portion, and a cord-holding portion connected between the first portion and the second portion. The lift cord is folded up and inserted through the cord hole of the cord stopper to form a loop which is hung on the cord-holding portion of the cord stopper.

Abstract: A Venetian blind is constructed to include a headrail, a bottom rail, a plurality of slats, a blind supporting system suspendedly and spacedly supporting the slats horizontally between the headrail and the bottom rail, two lift cords each having a first end fastened to the bottom rail and a second end extending upwardly through the slats into the headrail and then downwardly through a gate of a lift lock mounted in the headrail and terminating in an operation segment suspended below the headrail at a distance, and a knot constructed in each lift cord and having a dimension greater than the gate of the lift lock. Therefore, the knot limits the moving distance of the respective lift cord relative to the lift lock and, prevents a sudden dropping of the bottom rail upon failure of the lift lock.

Abstract: A cord stopper for use in slidably and detachably connecting a lift cord of a window blind assembly includes a first cover shell having an insertion hole for insertion of the lift cord, a second cover shell openably closed to the first cover shell to form a receiving chamber therebetween, and a plurality of holding down members disposed in the receiving chamber for pressing the lift cord that is inserted through the insertion hole of the first cover shell to hold the cord stopper on the lift cord.

Abstract: A lift lock for a blind is disclosed to include a casing holding a guide wheel, balls respectively received in respective sliding grooves around one side of the guide wheel, a shaft inserted through the casing and coupled to a lift rod of the blind, and a spring member sleeved onto the shaft for forcing an engagement portion of the shaft into engagement with a positioning opening of the casing. When the torque inputted into the lift rod surpassed the friction resistance between the casing and the shaft, the balls force the shaft to disengage the engagement portion from the positioning opening of the casing for enabling the lift rod to be freely rotated. When the input torque of the lift rod dropped, the spring member returns the shaft into engagement with the positioning opening of the casing to stop the lift rod in position.

Abstract: A window blind includes a transmission mechanism for lifting and lowering and/or tilting the slats of a Venetian blind. The mechanism includes a manually operated or motorized driving unit, and at least one cord roll-up unit. In the manually operated configuration, a single independent operating device is connectable to one or more driving force inputs of the mechanism. Also disclosed is a method for controlling a blind.

Abstract: A modularized power mechanism of blind is disclosed to include a main body, a winding unit, a transmission member and a resilient element. The main body has a first shaft hole and a second shaft hole substantially perpendicular to the first shaft hole. The winding unit is inserted into the first shaft hole of the main body and has a driving portion and a mounting hole for accommodating a reel of a blind therein. The transmission member is inserted into the second shaft hole of said main body and has a driven portion engaged with the driving portion of the winding unit for rotating synchronously. The resilient element has an end fixed to the main body and the other end fixed to the transmission member for providing a resilient force.

Abstract: A center of gravity adjustment device installed in a bottom rail of a window blind assembly for adjusting the center of gravity of the bottom rail is disclosed to include an adjustment wheel fastened rotatably with the bottom rail for rotating by a user, a rotating wheel fastened rotatably with the bottom rail and spaced from the adjustment wheel at a distance, a weight movable in the bottom rail between the adjustment wheel and the rotating wheel, and a cord member mounted around the adjustment wheel and the rotating wheel and fastened to the weight for moving the weight in said bottom rail between the adjustment wheel and the rotating wheel upon rotation of the adjustment wheel.

Abstract: A lift lock for a blind is disclosed to include a casing holding a guide wheel, balls respectively received in respective sliding grooves around one side of the guide wheel, a shaft inserted through the casing and coupled to a lift rod of the blind, and a spring member sleeved onto the shaft for forcing an engagement portion of the shaft into engagement with a positioning opening of the casing. When the torque inputted into the lift rod surpassed the friction resistance between the casing and the shaft, the balls force the shaft to disengage the engagement portion from the positioning opening of the casing for enabling the lift rod to be freely rotated. When the input torque of the lift rod dropped, the spring member returns the shaft into engagement with the positioning opening of the casing to stop the lift rod in position.

Abstract: A blind lift rod control lock includes a housing having an axle hole, a rotating member revolvably mounted in the axle hole of the housing, the rotating member having a non-circular through hole, which receives a lift rod for enabling the rotating member to be synchronously rotated with the lift rod, a reverse ratchet, and a forward ratchet, and a locking mechanism. The locking mechanism has a follower member, a first hooked portion adapted to engage the reverse ratchet, and a second hooked portion adapted to engage the forward ratchet. The follower member is selectively controlled to force the first hooked portion into engagement with the reverse ratchet or the second hooked portion into engagement with the forward ratchet.

Abstract: A combination window covering is constructed to include an elongated barrel fastened rolatably with a top side of a window, a bottom rail below the barrel, slats arranged in parallel between the barrel and the bottom rail, front and back ladder tapes connected in parallel between the barrel and the bottom rail at front and back sides of the slats and joining the slats, and a light-admitting flexible sheet. The flexible sheet has first and second ends respectively fixedly fastened to the barrel at two sides, a front half extended from the first end and suspended at the front side of the slats, a back half extended from the second end and suspended at the back side of the slats, and a middle part connected between the front half and the back half and moveably passing over the bottom rail.

Abstract: A blinds slat has a major portion being strips of bamboo and a minor portion being one or more pairs of wooden strips that are located at or near opposite side extremities of the slat. The resulting composite bamboo and wooden slat as exemplary resistance to warping and other deleterious effects of exposure to sun and moisture. Also disclosed is a method for producing the slats that is particularly advantageous in avoiding environmental harm, in that only small amounts of wood are used.