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.

In one aspect, a covering for an architectural structure includes a headrail, a bottom rail supported relative to the headrail, and at least one stackable covering element positioned between the headrail and the bottom rail. The covering also includes an overpowered lift system configured to provide a lifting force that raises the bottom rail relative to the headrail towards a retracted position of the covering. In addition, the covering includes retention structure provided in operative association with the bottom rail, with the retention structure being configured to engage at least one hold-down bracket to hold the bottom rail in position relative to the headrail against the lifting force provided by the overpowered lift system.

In one aspect, a covering for an architectural structure includes a headrail, a bottom rail supported relative to the headrail, and at least one stackable covering element positioned between the headrail and the bottom rail. The covering also includes an overpowered lift system configured to provide a lifting force that raises the bottom rail relative to the headrail towards a retracted position of the covering. In addition, the covering includes retention structure provided in operative association with the bottom rail, with the retention structure being configured to engage at least one hold-down bracket to hold the bottom rail in position relative to the headrail against the lifting force provided by the overpowered lift system.

A window covering includes a first rail and a plurality of non-moving elements arranged adjacent at least one spring motor positioned in the first rail. The non-moving elements contact at least one lift cord for routing of the lift cord through the first rail to increase friction incurred during motion of the lift cord(s) that takes place during height adjustment of window covering material. Non-moving members can also be positioned to contact at least one lift cord for routing of the lift cord through the first rail to increase friction incurred during motion of the lift cord(s) that takes place during height adjustment of window covering material. The non-moving elements and non-moving members can be positioned in the first rail such that they do not move relative to the first rail when the window covering is mounted and installed for use by a user to adjustably cover a window.

A window covering includes a first rail and a plurality of non-moving elements arranged adjacent at least one spring motor positioned in the first rail. The non-moving elements contact at least one lift cord for routing of the lift cord through the first rail to increase friction incurred during motion of the lift cord(s) that takes place during height adjustment of window covering material. Non-moving members can also be positioned to contact at least one lift cord for routing of the lift cord through the first rail to increase friction incurred during motion of the lift cord(s) that takes place during height adjustment of window covering material. The non-moving elements and non-moving members can be positioned in the first rail such that they do not move relative to the first rail when the window covering is mounted and installed for use by a user to adjustably cover a window.

A daylighting blind according to an aspect of the invention includes: a plurality of slats; and a support mechanism that interconnects the plurality of slats, a longitudinal direction of which is oriented in a horizontal direction, and supports the plurality of slats suspended in a vertical direction. At a boundary between a daylighting slat group composed of a plurality of daylighting slats in an upper position in the vertical direction and a light-shielding slat group composed of a plurality of light-shielding slats in a lower position in the vertical direction, the daylighting slats and the light-shielding slats are arranged consecutively. The support mechanism includes a lifting/lowering member that causes the daylighting slat group to be stored or extend independently.

A daylighting blind according to an aspect of the invention includes: a plurality of slats; and a support mechanism that interconnects the plurality of slats, a longitudinal direction of which is oriented in a horizontal direction, and supports the plurality of slats suspended in a vertical direction. At a boundary between a daylighting slat group composed of a plurality of daylighting slats in an upper position in the vertical direction and a light-shielding slat group composed of a plurality of light-shielding slats in a lower position in the vertical direction, the daylighting slats and the light-shielding slats are arranged consecutively. The support mechanism includes a lifting/lowering member that causes the daylighting slat group to be stored or extend independently.

A multi-partition blind system include a system of mechanisms that cause slats on a covering for an architectural opening to be partitioned into multiple operational sections. Partitions may be created to the extent of controlling each individual slat. Various embodiments and mechanisms are used to control, stabilize, and cause the opening and closing movement of one group of partitioned slats independent of others or individual slats independent of others.