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 window covering control assembly is used in a window covering system. The window covering control assembly comprises a driving module and a speed control module, and is provided in the shell, engaged to the weight element for simultaneous operation therewith. The driving module comprises a cord collecting assembly mounted in the shell. The cord collecting assembly is configured to operate in a first direction while a first driving force acting upon the cord collecting assembly such that the weight element descends away from the shell. The first driving force comprises at least a weight of the weight element. The speed control module is positioned corresponding to the driving module. A resistance force is selectively generated between the speed control module and the driving module, and this force reduces an operation speed of the cord collecting assembly in the first direction.

In a window covering system and a window covering control apparatus thereof, the window covering control apparatus comprises a driving module, a damping output module, and a damping control module. The damping output module and the driving module are configured to operate simultaneously. The driving module may drive the damping output module to provide damping to the driving module. The damping control module comprises a control detecting unit and a fitting unit. The control detecting unit comprises a detecting portion and a stopper portion, which are detachably engaged. During an expansion of a covering material, the driving module drives the damping output module to provide damping to the driving module; when the stopper portion is driven apart by the detecting portion from the fitting unit, the driving module operates independently of the damping output module to stop the damping output module from providing damping.

A damping adjustment device for adjusting a damping force to a window covering system while the window covering system is expanding, wherein the damping adjustment device comprises a damping module comprising first and second damping units. The damping force is outputted by the damping module to the window covering system when the first and second damping units generate an interaction force in between by a relative motion therebetween. An adjusting module is connected to the damping module for operating with the damping module simultaneously, wherein the damping force from the damping module is adjusted by the adjusting module altering a relative position of the first damping unit and the second damping unit when the relative motion occurs therebetween. A window covering system comprises the damping adjustment device, wherein expansion speed of a covering material of the window covering system can be effectively controlled and adjusted by the damping adjustment device.

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.

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.

An integrated direct drive motor system for industrial use includes an outer rotor motor axially aligned with, and coupled to, a rotating drum, with no transmission or clutch mechanism between the two so that the drum is effectively an extension of the outer rotor of the motor. An adapter coupler attaches to the motor and the drum to allow the motor to directly drive the drum. In one exemplary embodiment, a flexible curtain is spooled vertically by the drum to control an industrial high-speed roll-up door. In another exemplary embodiment, an endless-loop belt is driven by a horizontally-oriented drum to control an industrial conveyor system. Various embodiments of the integrated direct drive motor system and various method of operation are disclosed.

A roll control device for a vehicle curtain has a damper, a speed-reduction device, and a unidirectional transmission device. The speed-reduction device is connected to the damper and has a sleeve, a gear mount, and multiple planet gears. The sleeve is hollow and has multiple inner teeth annularly arranged in the sleeve. The gear mount is mounted in and extends out of the sleeve and is connected to the damper. The planet gears are mounted rotatably on the gear mount and engage with the inner teeth in the sleeve. The unidirectional transmission assembly is connected to the speed-reduction device and has a transmission member and a unidirectional transmission device. The transmission member has a gear segment extending into the gear mount and engaging with the planet gears. The unidirectional transmission device is connected to the transmission member to control the transmission member to rotate in unidirectional.