A peak cover for lift cord and tilt ladder includes a limiter having an arcuate cover. A fixed engagement plate is disposed at an upper end of a left side of the arcuate cover. Two stop walls are disposed on two sides of a lower end of the left side of the arcuate cover. Two grooves are formed inside the stop walls. Two annular ribs of a cord winding reel are engaged in the grooves, whereby the cord winding reel is freely rotatable. A movable engagement plate is disposed at an upper end of a right side of the arcuate cover. Four raised columns are formed on an upper end of the arcuate cover. The arcuate cover of the limiter is capped on the cord winding reel. The fixed engagement plate and the movable engagement plate of the arcuate cover are engaged with the annular ribs on two sides of the cord winding reel. Accordingly, after the arcuate cover is connected with the cord winding reel, the arcuate cover blocks the space above the cord winding reel so as to prevent the cord wound on the cord winding reel from jumping out of the cord winding reel.

A top rail mounting assembly includes a power mechanism, a driving mechanism, a winding mechanism, and a positioning mechanism. The power mechanism includes multiple power boxes arranged in a housing in a predetermined direction, each power box includes a box body and an elastic assembly configured inside the box body. The driving mechanism includes a driving rod and a driving assembly interlinked together, with the driving rod passing through each power box which is interlinked with the driving rod. The winding mechanism is connected to the driving assembly and interlinked with the power boxes through the driving assembly and the driving rod. The positioning mechanism is movably installed inside the housing for positioning the slats in any position. The top rail mounting assembly can ensure smooth operation during folding and unfolding of the blind.

An actuating system for a window shade includes a transmission axle rotatable about a longitudinal axis thereof, a braking spring having an engaged state adapted to prevent rotation of the transmission axle and a release state allowing rotation of the transmission axle, and a brake actuating mechanism that is connected to the braking spring and includes a switching actuator and a position selector. The position selector has a first hold position for holding the braking spring in the engaged state and a second hold position for holding the braking spring in the release state. The position selector is switchable from the first hold position to the second hold position or from the second hold position to the first hold position through a back-and-forth movement of the switching actuator between an initial state and an actuating state.

A curtain reel structure for assembling a blind cord rapidly is disclosed herein. It mainly comprises a winding spool, a reel seat on which the winding spool is assembled, a first positioning device disposed between the winding spool and the reel seat and having a first chamber and a first sliding seat inserted into the first chamber, wherein the first sliding seat is provided with a first accommodating slot for accommodating the blind cord, and a second positioning device disposed between the winding spool and the reel seat and having a second chamber and a second sliding seat inserted into the second chamber, wherein the second sliding seat is provided with a second accommodating slot for accommodating the blind cord.

An adjustable cord winder includes a winding unit, two cord-winding gears, two glide units, and two driving cords. The winding unit has two coil spring gears. A coil spring is connected between the coil spring gears. Each cord-winding gear meshes with one of the coil spring gears and thus rotates synchronously with the coil spring gear. Each glide unit has a roller unit capable of rotating by a specific angle and rollers freely, rotatably disposed at the roller unit. Each driving cord has one end connected to the cord-winding gear to allow the driving cord to wind on or let out from the cord-winding gear. The driving cords wind on at least one roller. The adjustable cord winder is characterized by the rollers for enhancing stability and smoothness of the driving process of the driving cords, and the roller unit for adjusting the tension on the driving cords.

The invention is a motorized gearbox assembly. The motorized gearbox assembly includes a motor that drives an output shaft. The output shaft actuates a window covering by applying torque to a tilt rod of the window covering. The output shaft extends substantially an entire length of the motorized gearbox assembly. It also has a through-channel that extends substantially an entire length of the output shaft, so that the tilt rod can pass entirely through the motorized gearbox assembly. Because of this, the motorized gearbox assembly can be used for retrofitting blinds. In some embodiments, the motorized gearbox assembly has a diametrically polarized magnet driven by the output shaft, and a position encoder that measures the output shaft's position and number of rotations.

A resistance mechanism is adapted to provide friction force to a cord of a window covering. The cord, accompanied by opening and closing the window covering, could be driven to move in a wound direction and a released direction, respectively. The resistance mechanism includes a resistance member including a resistance wheel. The resistance wheel is adjacent to the cord, and a section of the cord corresponding to the resistance wheel is wound around the resistance wheel. When the cord is driven to move in the wound direction or the released direction, the resistance wheel operably rotates in a first direction.

A double-layer cord rolling device includes a driving unit, and a cord rolling unit disposed under the driving unit. The driving unit has an upper base, two torsion spring gears rotatably disposed in the upper base and engaged with each other, and a torsion spring connecting the two torsion spring gears. The cord rolling unit has a lower base connected with the upper base, two cord rolling wheels disposed in the lower base in a way that they are capable of rotating synchronously and coaxial with the torsion spring gears respectively, and two lift transmission cords connected to the two cord rolling wheels respectively. A transmission shaft is employed to connect a torsion spring gear and a corresponding one of the cord rolling wheels , enabling them to rotate synchronously.

A horizontal blind structure includes a blind rail, more than one slat control unit and more than one cord winding unit. The slat control unit includes a fixing seat and a control polygonal drum received in the fixing seat and a cord restriction seat. The control polygonal drum is connected with a ladder belt. The ladder belt extends along the cord restriction seat to connect with the slats so as to control the slats to rotate into a horizontal state or a vertical state for shading sunlight. The cord winding unit includes a cord winding tube passing through the cord restriction seat and a movable conic tube movably fitted on the cord winding tube. A pull cord is wound on the movable conic tube. Multiple guide wheels are disposed at lower end of the cord restriction seat for guiding the pull cord to be positioned at the center of the slats, whereby the slats can be tidily overlapped and the pull cord is prevented from tangling so as to enhance the sunshade effect.

A motorized window covering switching mechanism is described herein. The switching mechanism includes a deflectable arm and a pull cord. The deflectable arm is connected to a first contact, and the pull cord is connected to the deflectable arm such that, as the pull cord is tugged, the deflectable arm deflects to move the first contact toward a second contact, thereby converting gestures of the pull cord into electrical signals that control a motorized window covering. In some embodiments, cord gestures that deflect the deflectable arm include pull sequences, numbers of pulls, strength of pulls, or combinations thereof. Additionally, in some embodiments, a controller receives the cord gestures and translates the cord gestures into operational commands to control and operate a window covering gearbox assembly.