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 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 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 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 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 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.

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 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.

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 cord-winding device for a Venetian blind includes: a first reel; a driving unit including a driving wheel and a spring-winding wheel; and a brake unit including a driven gear, a driving member, a ratchet wheel sleeved on the driving member, a plurality of friction members disposed between the driving member and the ratchet wheel, and at least pawl biased to engage the ratchet wheel. When the driven gear is driven by the first reel to rotate in a direction, rotation of the ratchet wheel is stopped by the pawl so that the driving member drives the friction members to rotate, and when the driven gear is driven by the driving wheel to rotate in an opposite direction, the driving member drives rotation of the friction members and, thus, the ratchet wheel.

Abstract: A window shade includes an upper rail, a lower rail, a shade unit, a reel unit and a retarding unit. The reel, unit is provided on one of the upper and lower rails, and includes a first pull cord that is connected to the other one of the upper and lower rails for adjusting the distance between the upper and lower rails. The retarding unit is provided on the one of the upper and lower rails, and includes a first retarder for retarding movement of the first pull cord. The first retarder includes two first retarding shafts that are spaced apart from each other in a horizontal direction. The first pull cord extends around the first retarding shafts.