Abstract: A Venetian blind includes two string reels, two spring reels, a leaf spring and a wheel set. The string reels are engaged with each other. The spring reels engaged with each other. The leaf spring includes two sections respectively wound on the spring reels so that one of the sections of the leaf spring gets longer and the remaining one of the sections of the leaf spring gets shorter when the spring reels are rotated. The wheel set connects one of the string reels to one of the spring reels. None of the spring reels is engaged with any of the string reels without the wheel set.

Abstract: A Venetian blind includes two string reels, two spring reels, a leaf spring and a wheel set. The string reels are engaged with each other. The spring reels engaged with each other. The leaf spring includes two sections respectively wound on the spring reels so that one of the sections of the leaf spring gets longer and the remaining one of the sections of the leaf spring gets shorter when the spring reels are rotated. The wheel set connects one of the string reels to one of the spring reels. None of the spring reels is engaged with any of the string reels without the wheel set.

Abstract: A winding wheel assembly includes a casing, a worm wheel, a worm, a pulley, a base and a cover unit. The casing includes a rod formed thereon and two barbs formed thereon. The worm wheel is inserted in the casing. The worm is engaged with the worm wheel. The pulley is connected to the worm and located out of the casing. The base is connected to the casing and located below the pulley. The cover unit includes a canopy for covering the pulley, a buckle engaged with the rod, and two barbs engaged with barbs of the casing.

Abstract: A reel-damping apparatus includes a cylinder, a leafed wheel, a plug and a moving ring. The cylinder includes an open end, a closed end and a track formed on an internal side. The leafed wheel includes a rod, a first end, a second end, at least one leaf formed on the rod, and a thread formed on the rod. The leafed wheel is inserted in the leafed wheel except the first end. The plug is fit in the cylinder through the open end and mounted on the rod so that the plug and the cylinder are rotatable relative to the leafed wheel. The moving ring including a thread engaged with the thread of the leafed wheel and at least one fin movable along the track. Damping liquid is filled in the cylinder to damp the cylinder when the cylinder is rotated relative to the leafed wheel.

Abstract: A reel-damping apparatus includes two tubes and a ring. The first tube includes an internal thread and an internal frusto-conical face formed with a small end and a large end. The second tube includes an external thread engaged with the internal thread when the second tube is inserted in the first tube. The ring is mounted on the second tube. The ring is in tighter contact with the first tube against the rotation of the first tube on the second tube as the ring is located at the small end of the frusto-conical face than at the large end of the frusto-conical face.

Abstract: A roller blind includes a roller, a web wound on the roller, and a damper unit for damping the rotation of the roller. The damper unit includes a cylinder, an axle and a damper. The cylinder is inserted in the roller so that they are rotatable together. The axle is inserted in the cylinder so that the cylinder is rotatable on the axle. The damper is provided between the cylinder and the axle to damp the rotation or the cylinder on the axle.

Abstract: A fastener is provided for fastening ropes. The fastener includes first unit and a second unit. The first unit is made of a hollow configuration and made with elastic strips. Each of the elastic strips includes a barb formed thereon. The second unit includes a waist extending from a block to a disc. Cutouts are defined in the block. The second unit is kept in the first unit as the block or the disc is engaged with the barbs. Each of the ropes includes a knot placed in an annular space defined between the first unit and the waist and a section inserted through a respective one of the cutouts. The block or the disc is disengaged from the barbs when the ropes are loaded with adequate tensile stress.

Abstract: A blind assembly includes a head box, an axle, a lift lock, a blind, a tube set, a rod and an effort-saving unit. The axle is located in the head box. The lift lock is provided on the head box. The blind includes a bottom rail and at least one rope. The rope is inserted through the lift lock and tied to the bottom rail at an end. The tube set is connected to the head box. The rope is located in the tube set. The rod is inserted in the tube set. The effort-saving unit for connecting the rope to the rod so that the bottom rail is lifted as the rod is pulled.

Abstract: A blind device includes a head box, a blind and an operation unit. The head box includes an axle located therein, a roller supported on the axle, and a lift lock located therein. The blind includes a bottom rail and a rope inserted through the lift lock. A first section of the rope is wound on the roller and connected to the bottom rail on a side of the lift lock. A second section of the rope is connected to the head box on another side of the lift lock. The operation unit includes a sleeve connected to the head box, a rod including a first end located in the sleeve and a second end located outside the sleeve, and a pulley connected to the first end of the rod. The second section of the rope is wound on the pulley.

Abstract: A slat angle adjusting device has a body, a positioning bar, a pinion, a drive axle, a rotating rod and a roller. The drive axle is rotatably mounted inside the body, engages with the pinion and has at least one helical tooth and an engaging end provided with multiple teeth. Each helical tooth is composed of multiple separate helical tooth elements, and a gap is defined between each pair of adjacent helical tooth elements. With the arrangement of gaps between the teeth elements, burs are prevented from occurring on the helical teeth of the drive axle, such that the transmission between the drive axle and the pinion is smooth.

Abstract: A slat angle adjusting device for a venetian blind has a body, a drive device and an outer casing. The body is hollow and has a shell and a cover. The shell and the cover each have a mounting hole and a mounting recess. The drive device is rotatably mounted on the body and has a pinion, a rotating rod and a roller. The pinion is rotatably mounted in the mounting holes in the shell and the cover. The rotating rod is rotatably mounted in the mounting recesses of the shell and the cover and is engaged with the pinion. The roller is attached to the rotating rod and has a cord recess, a gap and a locking hole. The outer casing is detachably connected to the body and has a base and a protecting hood.

Abstract: A shade roller has a seat, a loop hooked onto the seat, a side cover, a planet wheel engaged with the loop, a chain-retaining wheel secured in the side cover, a driving wheel engaged with the planet wheel, a beaded chain, and a fixing block engaged with the driving wheel. When the beaded chain is pulled, the planet wheel revolves around a fixing pin, and causes the driving wheel and the fixing block to revolve together, whereby a curtain can be raised or lowered.

Abstract: A positioning drum for a Venetian blind has a cylinder, two sidewalls and a cord plate. The cylinder extends longitudinally and has two sides and an outer surface. The sidewalls are curved, extend respectively from the sides of the cylinder and each sidewall has a first edge. The cord plate is mounted between the first edges of the sidewalls and has a notch, two mounting holes, two channels and two secure posts. The notch is defined in the cord plate and has two longitudinal edges and a bottom. The mounting holes are defined in the cord plate near the bottom of the notch. The channels communicate respectively with the mounting holes and the notch. The secure posts are formed respectively on the longitudinal edges of the notch and each secure post has a distal end. The distal end extends toward and bars one of the channels.

Abstract: A cord-controlling device for a window blind has a case, a cap, a gear, a spindle, a roller, a base and a lid. The cap is mounted on the case and a cavity formed between the case and the cap. The gear is received between the cavity formed between the case and the cap. The spindle engages with the gear and extends out the case and cap. The roller is mounted on the front end of the spindle for a cord rolling around. The base is pivotally mounted on the bottom edge of the case and the cap for holding the roller. The lid is pivotally mounted on the top edge of the case and the cap. The cord-controlling device for a window blind prevents the cord from escaping from the roller by the cap, therefore, the cord may move smoothly around the roller.

Abstract: A reel assembly includes a bracket and a reel pivotally received in the bracket. The bracket has a slanted face formed on a top face of the sidewall to be adjacent to the cutout for facilitating receiving of the extensions in the cutouts. A supporting arm is formed on a side face of the sidewall and has two steps formed on a top face of the supporting arm to increase load capability of the supporting arm. An inclined edge and an arcuate corner are formed on an inner face defining the through hole so that when a strip is extended through the through hole, friction to the strip by the inner face defining the through hole is reduced.

Abstract: A shade roller has a seat, a loop hooked onto the seat, a side cover, a planet wheel engaged with the loop, a chain-retaining wheel secured in the side cover, a driving wheel engaged with the planet wheel, a beaded chain, and a fixing block engaged with the driving wheel. When the beaded chain is pulled, the planet wheel revolves around a fixing pin, and causes the driving wheel and the fixing block to revolve together, whereby a curtain can be raised or lowered.

Abstract: A reeling unit for a blind has a base (30) and a roller (40). The base (30) has a bottom plate (31), two side brackets (34, 35), and a string hole (33) defined in the bottom plate (31). The roller (40) has two ends (44, 43) pivotally mounted on the two side brackets (34, 35) of the base (30) and has a tapered body (41) wound with a string (50). By sliding on the tapered body (41), the string (50) is automatically and orderly arranged on the roller (40) to avoid tangles and overlaps of the string (50). Additionally, because each reeling unit (20) individually collects a single string (50), even multiple reeling units (20) mounted on a window accessory will not interfere with each other so that tangling problem of the string (50) between elements of the window accessory is avoided.

Abstract: A reel assembly includes a bracket and a reel pivotally received in the bracket. The bracket has a slanted face formed on a top face of the sidewall to be adjacent to the cutout for facilitating receiving of the extensions in the cutouts. A supporting arm is formed on a side face of the sidewall and has two steps formed on a top face of the supporting arm to increase load capability of the supporting arm. An inclined edge and an arcuate corner are formed on an inner face defining the through hole so that when a strip is extended through the through hole, friction to the strip by the inner face defining the through hole is reduced.

Abstract: A slat angle adjusting device has a body, a positioning bar, a pinion, a drive axle, a rotating rod and a roller. The drive axle is rotatably mounted inside the body, engages with the pinion and has at least one helical tooth and an engaging end provided with multiple teeth. Each helical tooth is composed of multiple separate helical tooth elements, and a gap is defined between each pair of adjacent helical tooth elements. With the arrangement of gaps between the teeth elements, burs are prevented from occurring on the helical teeth of the drive axle, such that the transmission between the drive axle and the pinion is smooth.