Abstract: An adjustable resistance tail plug includes a fixed seat, an adjusting wheel, a sleeve, a screw rod unit, an outer casing, a friction wheel and a clutch spring. The friction wheel engages threadably the screw rod unit, and is driven by the sleeve to move relative to the outer casing, so as to adjust a friction force between the outer casing and the friction wheel. The clutch spring is switchable between a contracted state and an expanded state. When in the contracted state, the clutch spring is tightened to abut against the second circumferential surface so that the sleeve is prevented from rotating relative to the fixed seat by the clutch spring. When in the expanded state, the clutch spring releases the second circumferential surface, and the adjusting wheel is rotatable with the sleeve through the clutch spring.

Abstract: A cellular shade includes a head rail unit, an intermediate rail unit, a bottom rail unit, a blind body and a magnetically attractive unit. The head rail unit includes a head rail and a lower mounting bracket. The intermediate rail unit includes an intermediate rail and an upper mounting bracket. The magnetically attractive unit includes a first housing mounted on the lower mounting bracket, a second housing mounted on the upper mounting bracket, and a magnet mounted on one of the first and second housings. The other one of the first and second housings is magnetically attractive with the magnet. The first housing includes a first positioning member to be retainingly positioned to the lower mounting bracket. The head rail unit and the intermediate rail unit can be firmly secured to each other by means of the magnetically attractive unit so as to prevent light leaking.

Abstract: A window blind assembly includes a frame, an input shaft rotatably disposed in the frame, a blind unit, a winding unit for placing the blind unit in a retracted state when the input shaft is rotated in a first rotational direction and for shifting the blind unit to an expanded state when the input shaft is rotated in a second rotational direction, a control unit operable to drive rotation of the input shaft in the first and second rotational directions, a force-assisting unit having a spring capable of exerting a spring force on the control unit to resist the weight of the blind unit acting thereon, and a brake unit connected to the input shaft and generating a frictional force to resist rotation of the input shaft in the second rotational direction.

Abstract: A cellular shade includes a head rail unit, an intermediate rail unit, a bottom rail unit, a blind body and a magnetically attractive unit. The head rail unit includes a head rail and a lower mounting bracket. The intermediate rail unit includes an intermediate rail and an upper mounting bracket. The magnetically attractive unit includes a first housing mounted on the lower mounting bracket, a second housing mounted on the upper mounting bracket, and a magnet mounted on one of the first and second housings. The other one of the first and second housings is magnetically attractive with the magnet. The first housing includes a first positioning member to be retainingly positioned to the lower mounting bracket. The head rail unit and the intermediate rail unit can be firmly secured to each other by means of the magnetically attractive unit so as to prevent light leaking.

Abstract: A window blind assembly includes a frame, an input shaft rotatably disposed in the frame, a blind unit, a winding unit for placing the blind unit in a retracted state when the input shaft is rotated in a first rotational direction and for shifting the blind unit to an expanded state when the input shaft is rotated in a second rotational direction, a control unit operable to drive rotation of the input shaft in the first and second rotational directions, a force-assisting unit having a spring capable of exerting a spring force on the control unit to resist the weight of the blind unit acting thereon, and a brake unit connected to the input shaft and generating a frictional force to resist rotation of the input shaft in the second rotational direction.

Abstract: A cord-resistance adjusting device for a venetian blind includes limiting blocks disposed in a casing unit containing a scroll spring and cord reels. Each of two side casing parts of the casing unit has inner and outer limiting columns mounted thereinside. Each limiting block is movably disposed in the respective side casing part between the inner and outer limiting columns. A lift cord bends around and frictionally contacts the respective limiting block when moving from the inner limiting column to the outer limiting column.

Abstract: A cord-resistance adjusting device for a venetian blind includes limiting blocks disposed in a casing unit containing a scroll spring and cord reels. Each of two side casing parts of the casing unit has inner and outer limiting columns mounted thereinside. Each limiting block is movably disposed in the respective side casing part between the inner and outer limiting columns. A lift cord bends around and frictionally contacts the respective limiting block when moving from the inner limiting column to the outer limiting column.

Abstract: A venetian blind includes a frame unit, a slat unit, a transmission unit, and an operating unit. The slat unit includes multiple drive axles and a plurality of slats each connected co-rotatably to the drive axles. The transmission unit includes two transmission rollers, a plurality of constant-force coil springs that are linked together and that are coupled to the drive axles, and a belt that cooperates with the constant-force coil springs to form a loop trained on the transmission rollers. The operating unit includes an inner control member connected to the belt, and an outer control member operable to drive the inner control member to move so as to drive rotation of the drive axles via the constant-force coil springs to rotate the slats.

Abstract: A venetian blind includes a frame unit, a slat unit, a transmission unit, and an operating unit. The slat unit includes multiple drive axles and a plurality of slats each connected co-rotatably to the drive axles. The transmission unit includes two transmission rollers, a plurality of constant-force coil springs that are linked together and that are coupled to the drive axles, and a belt that cooperates with the constant-force coil springs to form a loop trained on the transmission rollers. The operating unit includes an inner control member connected to the belt, and an outer control member operable to drive the inner control member to move so as to drive rotation of the drive axles via the constant-force coil springs to rotate the slats.

Abstract: A cord reel device for retaining a pull cord of a window blind includes a casing unit, a reel unit and a retard unit. The casing unit defines a retaining space therein. The reel unit is disposed in the retaining space, and includes a reel wheel that is rotatable for reeling the pull cord, and a driving module that is connected to the reel wheel for driving rotation of the reel wheel. The retard unit includes at least three retarding pins that permit the pull cord to extend therearound for providing a retarding force to the pull cord.

Abstract: A window blind device includes a headrail, a bottomrail, a window shade, first and second control wheels, first and second cord spools, first and second cords, and a coil spring. The coil spring has a looped end portion sleeved on a first wheel hub of the first control wheel, and a spring body wound on the first wheel hub and extending from the looped end portion to terminate at a leading spring end which is connected to a second wheel hub of the second control wheel.

Abstract: A driving device includes a mounting frame, a driving rod, a driving gear, a worm, primary and auxiliary input members, and a reduction gear train. The mounting frame is connected to a frame unit. The driving rod is connected to a blind unit and is rotatable about a first axis. The driving gear is connected to the driving rod. The primary input member is rotatable about a second axis. The worm is connected to the primary input member and meshes with the driving gear. The auxiliary input member is rotatable about the second axis. The reduction gear train is connected between the primary and auxiliary input members, such that rotation of the auxiliary input member drives the primary input member to rotate at a speed different from that of the auxiliary input member.

Abstract: A driving device is for a window blind. The driving device includes a mounting frame disposed between parallel first and second plates of the window blind, and first and second transmission members. The first transmission member has an inner magnetic portion and a worm portion. The inner magnetic portion is adapted to be disposed adjacent to the first plate, and is rotatable under influence of a magnetic force from a side of the first plate. The worm portion is co-rotatably connected to the inner magnetic portion. The second transmission member has a worm gear portion meshing with the worm portion, and a driving rod connected to the window blind so as to be driven rotatably by the first transmission member to operate the window blind.

Abstract: A driving device includes amounting frame, a driving rod, a driving gear, a worm, primary and auxiliary input members, and a reduction gear train. The mounting frame is connected to a frame unit. The driving rod is connected to a blind unit and is rotatable about a first axis. The driving gear is connected to the driving rod. The primary input member is rotatable about a second axis. The worm is connected to the primary input member and meshes with the driving gear. The auxiliary input member is rotatable about the second axis. The reduction gear train is connected between the primary and auxiliary input members, such that rotation of the auxiliary input member drives the primary input member to rotate at a speed different from that of the auxiliary input member.

Abstract: A driving device for a window blind includes a rotary unit and a driving unit . The rotary unit includes a rotary shaft and a screw nut. The rotary shaft is mounted in a receiving space of a lower rail, is rotatable relative to the lower rail about an extending axis thereof, and is configured to permit pull cords to be wound thereon, such that rotation of the rotary shaft drives the lower rail to move relative to an upper rail. The screw nut engages a threaded section of the rotary shaft and is fixedly connected to the lower rail, such that the rotary shaft moves along the extending axis relative to the lower rail upon the rotation thereof relative to the lower rail. The driving unit is linked to the rotary shaft for driving the rotation of the rotary shaft.

Abstract: A includes upper and lower rails, a blind unit, a reel unit, mounted to the upper rail, two pull cords, a retarding unit mounted to the upper rail, and a ladder-string adjusting unit. The retarding unit includes two retarders each of which includes a bracket, a first retarding shaft mounted to a lateral wall of the bracket, and a rod member mounted to an end wall of the bracket. The ladder-string adjusting unit includes two ladder-string seats respectively mounted to the brackets of the retarders, a connecting rod interconnecting the ladder-string seats, and two ladder strings connected to the blind unit. Each of the ladder-string seats is located above the rod member and the first retarding shaft of the corresponding retarder.

Abstract: A retarding device is used to retard movement of a cord of a window shade. The retarding device includes a support frame and a retarding unit. The support frame includes a base part having a base slot formed therethrough, and a side plate disposed at one side of the base part and having a securing portion formed therethrough. The retarding unit includes a cord retarding module, and a rod member disposed at the base slot. The cord retarding module has a mounting seat secured to the securing portion, and a retarding shaft rotatably supported on the mounting seat. The rod member and the retarding shaft are parallel to each other and extend in a longitudinal direction.

Abstract: A built-in blind assembly includes light-transmissive first and second outer panels, a blind unit, a frame unit, a top rail unit, and a cord-driving unit. The first and second outer panels face each other. The blind unit is disposed between the first and second outer panels. The frame unit includes a top frame disposed above the blind unit. The top rail unit includes a top rail seat that is connected to the top frame and that defines a top accommodating cavity having an open side adjacent to the second outer panel, and a top cover that is removably connected to the top rail seat. The cord-driving unit is disposed in the top accommodating cavity, is coupled to the blind unit, and is operable to control operation of the blind unit.

Abstract: A window blind includes an outer framework and a blind unit. The outer framework defines a retaining space therein, and has two open grooves in spatial communication with the retaining space. The blind unit includes a plurality of slats and two ladder strings. Each of the slats has an intermediate portion, and two end portions respectively extending into the open grooves of the outer framework. Each of the ladder strings is retained in a respective one of the open grooves, and interconnects the corresponding end portions of the slats retained in the respective one of the open grooves.

Abstract: A window blind device includes a headrail, a bottomrail, a window shade, a frame, and a plurality of control wheels. The frame includes two frame halves each including a wall body and a plurality of shaft halves. When the frame halves are brought into mating engagement with each other, male and female connecting regions of each of the shaft halves of each of the frame halves matingly fit with the female and male connecting regions of a corresponding one of the shaft halves of the other one of the frame halves, respectively.