A mounting assembly may include an arced connecting member that includes a first drive chain along a bottom surface of the arced connecting member, a second drive chain positioned adjacent to the first drive chain, and a third drive chain in a gap between the first and the second drive chains. The mounting assembly may include an intermittent-motion drive system that has a drive wheel with a nub extending from a lateral surface of the drive wheel, the nub being shaped to interface with notches included along the third drive chain. The intermittent-motion drive system may include a first and a second protrusion shaped to interface with surfaces of the first and second drive chains, respectively. Rotation of a drive axle extending through the drive wheel may affect rotation of the drive wheel, rotational movement of the nub extending from the drive wheel, and movement of the arced connecting member.

A window blind includes an input mechanism adapted to change a location of a bottom rail, an adjustment output mechanism adapted to be motivated when the bottom rail is located at a low position, whereby to tilt slats between two positions, and an output clutch mechanism, which is adapted to be driven by the input mechanism to move the bottom rail toward a high position, and is adapted to be driven by the input mechanism to move the bottom rail toward the low position when it is at the high position. A stroke delay mechanism is provided on a transmission path from the adjustment output mechanism to the output clutch mechanism, which is adapted to delay an affected time for transmission. Whereby, only one single control module is required to adjust the inclination angle of the slats and to collect and expand the covering material.

A window blind includes a fixed rail and a plurality of slats hang below the fixed rail through a ladder tape. The slats are controlled by an output adjustment mechanism to change between a first state and a second state. In addition, an output clutch mechanism is provided to collect or to expand the window blind. Said output adjustment mechanism and said output clutch mechanism are both controlled by an input mechanism. Whereby, it requires only one single control module to adjust shielding of the slat assembly composed of the slats, and to expand or collect the slat assembly.

A control structure for a window covering includes a base, a revolving wheel having an axial post, a restriction means including a bushing fitting around the axial post, a transmission member provided on a side of the bushing, and at least one pawl connected to the axial post. The revolving wheel is connected to the base. The restriction means has at least one cutting groove. The transmission member has at least one abutting portion on an inner wall thereof. The pawl is pivotable within a width of the cutting groove. When the revolving wheel is rotated forward, an end of the pawl passes through the cutting groove to mesh with the abutting portion. When the revolving wheel is rotated backward, the pawl disengages from the abutting portion, and the transmission member is rotatable relative to the revolving wheel. Whereby, it could prevent generating noise while operating the window covering.

A control structure for a window covering includes a base, a revolving wheel having an axial post, a restriction means including a bushing fitting around the axial post, a transmission member provided on a side of the bushing, and at least one pawl connected to the axial post. The revolving wheel is connected to the base. The restriction means has at least one cutting groove. The transmission member has at least one abutting portion on an inner wall thereof. The pawl is pivotable within a width of the cutting groove. When the revolving wheel is rotated forward, an end of the pawl passes through the cutting groove to mesh with the abutting portion. When the revolving wheel is rotated backward, the pawl disengages from the abutting portion, and the transmission member is rotatable relative to the revolving wheel. Whereby, it could prevent generating noise while operating the window covering.

A transmission includes a gear mechanism including a gear box, a drive shaft, and an output gear, wherein a bending movement converted into a rotational motion of the output gear is realized through a wobbled member upon rotation of the drive shaft. First and second gear wheels are connected to the output gear and each includes at least one idler pulley having a locking direction and a freewheeling direction. A wobbled plate, mounted on the drive shaft so as not to rotate independently, carries the wobbled member and is positioned to pivot within the wobbled member. The inclination angle of the wobbled plate relative to the wobbled plate rotation axis can be adjusted via control actuators, enabling the wobbled plate to tilt upon rotation of the drive shaft and thus creating a wobbled movement in the wobbled member via the bearing between the wobbled plate and the wobbled member.

A multi-link rotation structure is provided, including: a base; two arm assemblies, each of the two arm assemblies including a pivot portion pivoted to the base and at least two arms connected with the pivot portion and extending away from each other, the pivot portions of the two arm assemblies being non-coaxial; at least two unidirectional rotation devices, respectively axially pivoted to the at least two arms of one of the two arm assemblies, rotatable in a same direction; at least two linkage assemblies, each of the at least two linkage assemblies pivoted to the at least two arms of the other of the two arm assemblies and pivoted to one of the at least two unidirectional rotation devices.

A multi-link rotation structure is provided, including: a base; two arm assemblies, each of the two arm assemblies including a pivot portion pivoted to the base and at least two arms connected with the pivot portion and extending away from each other, the pivot portions of the two arm assemblies being non-coaxial; at least two unidirectional rotation devices, respectively axially pivoted to the at least two arms of one of the two arm assemblies, rotatable in a same direction; at least two linkage assemblies, each of the at least two linkage assemblies pivoted to the at least two arms of the other of the two arm assemblies and pivoted to one of the at least two unidirectional rotation devices.

A transmission includes a gear mechanism including a gear box, a drive shaft, and an output gear, wherein a bending movement converted into a rotational motion of the output gear is realized through a wobbled member upon rotation of the drive shaft. First and second gear wheels are connected to the output gear and each includes at least one idler pulley having a locking direction and a freewheeling direction. A wobbled plate, mounted on the drive shaft so as not to rotate independently, carries the wobbled member and is positioned to pivot within the wobbled member. The inclination angle of the wobbled plate relative to the wobbled plate rotation axis can be adjusted via control actuators, enabling the wobbled plate to tilt upon rotation of the drive shaft and thus creating a wobbled movement in the wobbled member via the bearing between the wobbled plate and the wobbled member.

A transmission includes a gear mechanism including a gear box, a drive shaft, and an output gear, wherein a bending movement converted into a rotational motion of the output gear is realized through a wobbled member upon rotation of the drive shaft. First and second gear wheels are connected to the output gear and each includes at least one idler pulley having a locking direction and a freewheeling direction. A wobbled plate, mounted on the drive shaft so as not to rotate independently, carries the wobbled member and is positioned to pivot within the wobbled member. The inclination angle of the wobbled plate relative to the wobbled plate rotation axis can be adjusted via control actuators, enabling the wobbled plate to tilt upon rotation of the drive shaft and thus creating a wobbled movement in the wobbled member via the bearing between the wobbled plate and the wobbled member.