Abstract: An anti-reverse transmission for use in a window blind includes a fixed axle, a rotatable input shaft, an output shaft sleeved onto the fixed axle, a transmission shaft sleeved onto the output shaft and coupled to a linking rod of a window blind, the transmission shaft having a protrusion inserted into an opening in the output shaft, and a spiral spring fitted on the fixed axle within the output shaft. The spiral spring has two end tips suspended in the opening such that the spiral spring is radially expanded to disengage the output shaft from the fixed axle for rotation with the transmission shaft and the input shaft upon rotation of the input shaft, and the spiral spring is radially compressed to stop the output shaft from rotation when the transmission shaft receives a biasing force from the gravity weight of a blind body of the window blind.

Abstract: A Venetian blind. The blind includes a horizontal headrail, two vertical side rails arranged in parallel at two sides below the headrail, and a horizontal bottom rail spaced below the headrail and vertically movable along the length of the side rails. Slats are, arranged in parallel between the headrail and the bottom rail. Two connecting cord members are longitudinally connected to the slats and each having two ends respectively connected to the headrail and the bottom rail. Two positioning mechanisms are provided between the side rails and the ends of the bottom rail and adapted to secure the ends of the bottom rail to the side rails at the desired elevation.

Abstract: A rotator, which is driven by an endless cord member to rotate, is used in a window blind for driving a roller of the window blind. The rotator includes a base having a shaft, a first clamping plate and a second clamping plate rotatably serially mounted on the shaft of the base for clamping the cord member therebetween, and an elastic biasing device provided between the base and one of the first and second clamping plates for urging the first and second clamping plates against each other.

Abstract: A rolling mechanism includes a base frame fastened to a top side of a window and having a coupling flange, a roller rotatably mounted below the base frame for stationary rotation and having a locating groove on its periphery, and at least one constraint member having a coupling portion pivotally coupled to the coupling flange of the base frame and a constraint portion extending from the coupling portion for engaging the locating groove of the roller and further limiting the rotary direction of the roller to one direction only.

Abstract: A window shade for detachably connecting a headrail of a window blind includes a shade body having a top side and a transverse rod fixedly provided at the top side, a flexible connecter provided at the top side of the shade body, and a fastener provided at the top side of the shade body corresponding to the flexible connecter. The flexible connecter is detachably connected to the fastener to form a hanging space for receiving of the headrail of the window blind.

Abstract: A balance-adjustable bottom rail for a window blind is constructed to include an elongated hollow rail body having a longitudinal axis, a weight mounted inside the rail body and movable along the longitudinal axis of the rail body for adjusting the center of gravity of the rail body, and a positioning device for locking the weight to the rail body.

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 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 shutter includes a frame having an open space, a set of louvers arranged pivotally and parallel within the open space, and a control rod coupled to the louvers for tilting the louvers to an open status and a close status. A top block of the frame includes an exposed stepped front wall having a uniform cross section along a transverse length thereof. The exposed front wall is provided with a flat receiving portion and a flat blocking portion. When tilted the louvers to the close status, the flat blocking portion blocks a gap between the set of louvers and the top block, and the flat receiving portion receives a top end of the control rod, preventing interference with movement of the control rod.

Abstract: A bracket assembly includes a bracket provided with a coupling portion, a locating frame provided with a coupling portion connectable to the coupling portion of the bracket, and a level mounted on the locating frame for showing whether the bracket is in level after connection of the coupling portion of the locating frame to the coupling portion of the bracket. By means of the indication of the level, the bracket can easily be adjusted to horizontal during installation of the bracket assembly in a window.

Abstract: A window blind control structure used in a window blind for controlling lifting and tilting of the blind slats is constructed to include a transmission mechanism mounted in a headrail of the window blind and coupled to blind slats of the window blind, a linking mechanism coupled to the transmission mechanism, and an operation device for operation by the user to bias the linking mechanism and to further drive the transmission mechanism to adjust the elevation and tilting angle of the blind slats.

Abstract: A drapery shade includes a shade having a top and a bottom, two tieback sets and two fastening units. The two tieback sets are vertically suspended near two opposite lateral sides of the shade. Each tieback set has a first belt vertically suspended from the top of the shade at a front side relative to the shade, and a second belt vertically suspended from the top of the shade at a back side relative to the shade. The two fastening units are disposed respectively at the two tieback sets for coupling the first belts of the tieback sets to the second belts of the tieback sets to support the bottom of the shade at a desired elevation.

Abstract: A window blind includes a headrail, a bottom rail and a plurality of fabric slats arranged in parallel between the headrail and the bottom rail. Each fabric slat has two stiff support rods disposed at the two opposite long sides thereof. A plurality of ladder tapes are symmetrically connected between the headrail and the bottom rail and located respectively at the two opposite long sides of the fabric slats. Each ladder tape is formed of a plurality of strands by weaving and has a plurality of through holes in the netting structure thereof for the insertion of the support rods of the fabric slats so as to join the fabric slats to the ladder tapes between the headrail and the bottom rail at different elevations.

Abstract: A retractable blind slat for a window blind includes an elongated first slat element and an elongated second slat element that is axially moveably coupled to the first slat element. The second slat element has a plurality of locating grooves and the first slat element has a retaining block selectively engaged with one of the locating grooves to immobilize the second slat element relative to the first slat element.

Abstract: A fabric window blind includes a head frame, a roller, an adjustment mechanism, slats, a bottom rail and a light-admitting shade. The roller is horizontally rotatably mounted inside the head frame. The adjustment mechanism has a control axle horizontally pivotally mounted inside the head frame below the roller, and two cord member sets having top ends connected to the control axle and bottom ends vertically downwardly suspended from the control axle. The slats are arranged at different elevations below the control axle. The slats each have two opposite lateral sides respectively joined to the cord member sets. The bottom rail is fastened to the bottom ends of the cord member sets below the slats. The shade has a first end fastened to the head frame, and a second end extended downwardly over the bottom rail and turned upwards toward the head frame and fastened to the roller.

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: An adjustment device for a roller blind having a bracket and a roller that is pivoted to the bracket and for adjusting the level of the roller includes a base frame, a moveable member and an adjustment member. The base frame is fastened to an end of the bracket. The moveable member, which is moveably mounted on the base frame, has a mounting hole for holding an end of the roller. The adjustment member is mounted in the base frame for moving the moveable member to further move the roller vertically up and down relative to the base frame.

Abstract: A control device for Venetian blinds and a control method includes a position unit, a rope-control unit and a movement limit unit. The position unit is fixed in an upper rail. The rope-control unit consists of a wind wheel, a rope, an engage wheel and a clutch. The wind wheel is pivotally connected to the position unit, and the rope has one end fixed with the wind wheel and the other end hanging down for a user to handle. The rope rotates the wind wheel, and the engage wheel fits with the wind wheel and fixed with the hanging unit. The clutch is connected with and can be rotated by the wind wheel in a first direction, or the wind wheel and the engage wheel does not rotate together in case of rotation in a second direction. The movement limit unit has a lever member swung by the rope to engage with or disengage from the ratchet for the hiding unit to rise up or move down and be positioned stably.

Abstract: A light transmittance adjustable Roman shade includes soft shading elements arranged in parallel at different elevations below a headrail. Each shading element has a curved bottom suspension such that the Roman shade shows a waterfall-like folding face. A cord member is joined in proper order with a top side of each shading element and has a top end connected to the headrail. Another cord member is joined in proper order with a bottom side of each shading element and has a top end wound around a shaft that is rotatably mounted inside the headrail for enabling the user to control a gap between each two adjacent shading elements.

Abstract: A fabric blind slat for a window blind includes a base fabric made from an opaque knitted fabric, two coil units respectively coupled to and extended along two opposite edges of the base fabric, and two supporting sleeves respectively enclosed inside the two coil units. The coil unit is knitted from a thread looped on a thread at the edge of the basic fabric. The supporting sleeve is a tubular member having two open ends for insertion of a rigid supporting member therein. The supporting sleeve is enclosed inside the coil unit at the time while the coil unit is formed by knitting.