Abstract: A shade member and a window blind including multiple such shade members are provided. The shade member is made by welding a first shade element, a second shade element, and a third shade element together. The second shade element is situated on a first region of the first shade element, while the first shade element and the second shade element are unified by longitudinally overlapping and ultrasonic welding. The third shade element is situated on a second region of the first shade element, while the first shade element and the third shade element are unified by longitudinally overlapping and ultrasonic welding. Such a structure allows the shade member to easily include distinct portions made of different materials, so that the window blind including such shade members can provide a variety of appearance designs and texture combinations while lowering the production cost and increasing the production efficiency.

Abstract: An electric window covering has a covering material, a driving device, a microcontroller, a position detecting module and a trigger detecting module. The position detecting module detects a position of a lower end of the covering material to generate a position information. The microcontroller compares the position information with a reference position to generate a position relationship with respect to the reference position. The trigger detecting module detects whether the covering material is moved by an external force for generating a detecting result. When the microcontroller determines that a trigger event is received according to the detecting result, the microcontroller configures the driving device to move the covering material according to the position relationship and the trigger event.

Abstract: A motorized venetian blind includes a first lifting electric machine, a second lifting electric machine and a tilting electric machine for respectively control a front pull cord, a rear pull cord and a ladder cord. When a front warp and a rear warp of the ladder cord are controlled by the tilting electric machine to move downwardly and upwardly respectively to tilt the slats to the closed position, one of the pull cords on the same side as the upwardly-moving warp is controlled by the first lifting electric machine or the second lifting electric machine to move upwardly along with the upwardly-moving warp. Therefore, the synchronization of the pull cords and the ladder cord is improved, whereby closure between the slats is enhanced, and the bottom rail can be fully tilted to be mostly vertical, partially overlapping the neighboring slat for preventing light leakage.

Abstract: A cord retractor for a window covering comprises a housing and a driving wheel, a reeling wheel, a spring, a friction member and a unidirectional transmission mechanism. The driving wheel and the reeling wheel can rotate with each other. The spring is coupled with the driving wheel and is wound on or unwound from the driving wheel according to a rotating direction of the driving wheel. The friction member is in a closed loop shape and surrounding a shaft of the housing. The unidirectional transmission mechanism is coupled with the friction member and the reeling wheel, and operated in different operation modes according to a rotating direction of the reeling wheel, by which the friction member provides constant resistance to the rotation of the reeling wheel when the reeling wheel rotates in a first direction, and stops providing resistance when the reeling wheel rotates in a second direction.

Abstract: A motorized window treatment has a headrail, a first operable rail and a second operable rail, a driving device, a distance detection circuit, a receiving circuit and a motor control circuit. The motor control circuit is coupled with the receiving circuit and the distance detection circuit for configuring the driving device to move the first operable rail and the second operable rail according to the signals received by the receiving circuit. When the receiving circuit receives a command signal to move the second operable rail towards a target position and the first operable rail locates between the second operable rail and the target position, the motor control circuit configures the driving device to move the second operable rail and the first operable rail collectively towards the target position.

Abstract: A window covering system and a calibration method therefor are provided for generating a safe distance between a middle rail and a lower rail according to status of a first lifting cord. The calibration method includes moving the middle and lower rails upwardly until reaching their initial positions, moving down the lower rail a predetermined distance and storing the detected position thereof as a first position, moving down the middle rail until a switch transmits a first signal as the first lifting cord running through the switch becomes loose, moving up the middle rail until the switch stops transmitting the first signal as the first lifting cord becomes tense, storing the detected position of the middle rail as a second position, and generating the safe distance according to the first and the second positions such that the middle rail is prevented from being pushed by the lower rail.

Abstract: A window covering includes a headrail, a covering material located below the headrail, a rotating member connected to the covering material and provided in the headrail, a motor provided in the headrail and coupled to the rotating member, and a control device provided in the headrail and electrically connected to the motor. The headrail has a longitudinal direction. The rotating member is adapted to drive the covering material to expand or collapse. The motor drives the rotating member to rotate. When a moving speed of a lower end of the covering material decreases and such a situation lasts for a predetermined time, the control device controls the motor to stop operating. Whereby, no matter whether the covering material is fully expanded, fully collapsed, or encounters resistance somewhere in between, the motor can be stopped.

Abstract: A window covering cutting apparatus includes a supporting base, a mounting base, a cutting device, a size positioning device, an input device, an output device, a storage device and a signal processing circuit. The signal processing circuit calculates acquired information including product information, a mounting mode, cutting size information and a position detecting value to generate adjusted position information and target position information, and displays them on the output device. The size positioning device is adjusted until the adjusted position information equals to the target position information, after which the signal processing circuit sets the cutting device to cut the window covering to the required size. Since a correct cutting position of the window covering is obtained by the calculation of the signal processing circuit, a risk of cutting the window covering to a wrong size due to miscalculation by users is reduced.

Abstract: A size positioning device applied to a window covering cutting apparatus includes a manual operating member, a limit assembly and a position detecting device. The limit assembly can be driven by the manual operating member to move. The position detecting device can detect a position of the limit assembly and generate a position detecting value. According to the position detecting value, a signal processing circuit of the window covering cutting apparatus generates adjusted position information and target position information, and displays the adjusted position information on an output device. The manual operating member is adjusted according to the adjusted position information to move the limit assembly until the adjusted position information equals to the target position information, after which a cutting device cuts a first end of the window covering. Thereby, a risk of cutting the window covering to a wrong size due to miscalculation by users is reduced.

Abstract: A motorized blind and a manual switching clutch structure thereof are disclosed. The motorized blind includes a blind assembly, a spring power module, an electric motor module and the manual switching clutch structure. The blind assembly includes a bottom rail which can be driven by the spring power module to move. The manual switching clutch structure is disposed between the spring power module and the electric motor module. By rotating a knob of the manual switching clutch structure, the motorized blind can be switched between a motor driving mode in which the electric motor module participates in the movement of the bottom rail by driving the spring power module, and a manual driving mode in which the spring power module individually participates in the movement of the bottom rail.

Abstract: A window blind has a headrail, a bottom rail, and multiple slats provided below the headrail. In the headrail, an adjusting shaft and an auxiliary adjusting module are provided and connected. A ladder string is connected to the adjusting shaft, whereby the adjusting shaft adjusts a shape of the ladder string to tilt the slats and the bottom rail. A first cord and a second cord extend out of the headrail and are connected to opposite sides of the bottom rail. When the adjusting shaft drives the slats to tilt in a direction, the auxiliary adjusting module releases the first cord out of the headrail and retracts the second cord into the headrail. When the slats are tilted in an opposite direction, the auxiliary adjusting module retracts the first cord into the headrail and releases the second cord out of the headrail.

Abstract: A cordless window covering includes a first rail, a second rail, a covering body, two pulling cords, and a cord-retracting device including a first casing and an adjusting member movably disposed on the first casing. When relative motion of the first rail and the second rail occurs, the covering body is extended or retracted, and the two pulling cords apply a first force and a second force in opposite directions to the adjusting member respectively. When the first force does not equal to the second force, the user can exert slight force on the second rail to move the adjusting member towards a side with greater force, making one of the pulling cords applying greater force to the adjusting member have its length between the first rail and the second rail elongate as the adjusting member moves, such that the non-horizontal state of the second rail can be easily corrected.

Abstract: A window blind, wherein each ladder tape thereof includes two longitudinal cords, plural bearers and plural limiting members. The longitudinal cords each have an end connected to a deflecting mechanism disposed on the upper rail. The bearers are disposed between the two longitudinal cords for respectively supporting the slats. The limiting members include a first limiting member and a second limiting member neighboring thereto. The first limiting member has an end disposed on one of the longitudinal cords and includes a first slat-through portion located between two ends thereof passing through a first through hole of a first slat. A first linking loop is formed after the first slat-through portion passes through the first through hole. The second limiting member passes through the first linking loop for keeping the first through hole threaded through by one of the first limiting member and the second limiting member.

Abstract: A top-down bottom-up window covering has a headrail, a middle rail, a bottom rail, a lifting control structure installed at the headrail, and a covering structure installed between the middle rail and the bottom rail. The lifting control structure controls a first rotating shaft and a second rotating shaft to respectively receive or release a first cord and a second cord. The first cord drives the middle rail to move, and the second cord drives the bottom rail to move. A one-way clutch and a pre-stress unit are further provided at the headrail. When the bottom rail pushes the middle rail to move upward, the one-way clutch breaks a link between the first rotating shaft and the lifting control structure. Consequently, a driving force generated by the pre-stress unit immediately drives the first rotating shaft to receive the first cord to keep the first cord taut.

Abstract: A cord retractor for a window covering comprises a housing and a driving wheel, a reeling wheel, a spring, a friction member and a unidirectional transmission mechanism. The driving wheel and the reeling wheel can rotate with each other. The spring is coupled with the driving wheel and is wound on or unwound from the driving wheel according to a rotating direction of the driving wheel. The friction member is in a closed loop shape and surrounding a shaft of the housing. The unidirectional transmission mechanism is coupled with the friction member and the reeling wheel, and operated in different operation modes according to a rotating direction of the reeling wheel, by which the friction member provides constant resistance to the rotation of the reeling wheel when the reeling wheel rotates in a first direction, and stops providing resistance when the reeling wheel rotates in a second direction.

Abstract: A window covering includes a housing, a covering material, a spindle, and a driving device. The spindle and the driving device are provided at the housing. The driving device includes a motor having a shaft, and an epicyclic gearing decelerating device having an input end and an output end connected to the shaft and the spindle, respectively. Whereby, the spindle can drive the covering material to expand or to collapse. The epicyclic gearing decelerating device includes a ring portion and at least a planet gear assembly which is coupled between the input end and the output end. The planet gear assembly includes a plurality of planet gears having a Shore A durometer hardness of 45-90, which is rotatable along the fixedly provided ring portion. While being driven to move, a lower end of the covering material moves at a speed higher than 65 mm per second.

Abstract: A window blind includes a housing, a slat assembly, a slat angle adjusting device, and a first cord. The slat assembly is provided below the housing, and has multiple slats and a bottom end portion. The slat angle adjusting device includes a rotating shaft assembly provided in the housing, and a ladder assembly which includes at least two ladders connected to the rotating shaft assembly for turning the slats. The first cord passes on a front or a rear side of the slats, and connects the rotating shaft assembly and the bottom end portion. Throughout the duration of the rotation of the rotating shaft assembly, the first cord and a warp, which belongs to the ladder assembly and on the same side as the first cord, are both reeled into or out of the housing concurrently, and the slats and the bottom end portion are all rotated concurrently as well.

Abstract: A vertical blind has a headrail, a transmission shaft, a plurality of slats located below the headrail with a gap, a driving assembly, a first clutch, a first pushing component, and a light-blocking member configured to be driven by the first pushing component to move from a blocking position coving the gap to a non-blocking position revealing at least a part of the gap. When the transmission shaft is driven to rotate in a first direction, the first pushing component is moved toward the first end of a movable region. When the first pushing component has been moved to the first end of the movable region and the transmission shaft keeps being driven to rotate in the first direction, the first clutch prevents the transmission shaft from further driving the first pushing component, whereby the first pushing component stays at substantially the first end of the movable region.

Abstract: A window blind has a headrail, a bottom rail, and multiple slats provided below the headrail. In the headrail, an adjusting shaft and an auxiliary adjusting module are provided and connected. A ladder string is connected to the adjusting shaft, whereby the adjusting shaft adjusts a shape of the ladder string to tilt the slats and the bottom rail. A first cord and a second cord extend out of the headrail and are connected to opposite sides of the bottom rail. When the adjusting shaft drives the slats to tilt in a direction, the auxiliary adjusting module releases the first cord out of the headrail and retracts the second cord into the headrail. When the slats are tilted in an opposite direction, the auxiliary adjusting module retracts the first cord into the headrail and releases the second cord out of the headrail.

Abstract: A damping device of a window covering is provided, including a headrail, a covering material, and a driving device, wherein the driving device is located in the headrail to raise and extend the covering material. The damping device is provided in the headrail, and includes a metal member and a magnetic member, wherein at least a magnetic pole of the magnetic member faces the metal member. The metal member is located within a magnetic field of the magnetic member. Either one or both the metal member and the magnetic member is drivable by the driving device to make the metal member and the magnetic member move relative to each other. Whereby, the damping device is able to provide a desired damping effect at different temperature or after a long period use, such that the rotation of the metal member and the movement of the covering material are slowed down.