A covering for an architectural opening has a horizontal movable rail supported by cords, with a variety of configurations which allow the movable rail to be moved up and down while concealing the cords.

A headrail for a motorized window covering is described that includes a motor and a gearbox coupled to the motor that is configured to actuate a window covering. The headrail includes a safety detector with one or more sensors that detect an irregular strain when the window covering is being raised. The headrail may further comprise a recoil mechanism or a deactivation mechanism to reduce the likelihood of damage to the window coverings and/or individuals caught or tangled in the window covering.

The locking tensioner comprises first and second elongate arms connected by a bridge. The distal end of the second arm has a tongue. The distal end of the first arm has a head with an aperture dimensioned to receive a chain therethrough, the head further having a slot dimensioned to releasably receive the tongue within the aperture. The second arm is pivotable relative to the first arm between a locked and an unlocked configuration. In the unlocked configuration, the tongue is disposed in the aperture to permit the chain to move through the aperture. In the locked configuration, the tongue applies a shear force between the chain and the head to restrict the movement of the chain. The bridge biases the first and second arms towards the locked configuration.

The locking tensioner comprises first and second elongate arms connected by a bridge. The distal end of the second arm has a tongue. The distal end of the first arm has a head with an aperture dimensioned to receive a chain therethrough, the head further having a slot dimensioned to releasably receive the tongue within the aperture. The second arm is pivotable relative to the first arm between a locked and an unlocked configuration. In the unlocked configuration, the tongue is disposed in the aperture to permit the chain to move through the aperture. In the locked configuration, the tongue applies a shear force between the chain and the head to restrict the movement of the chain. The bridge biases the first and second arms towards the locked configuration.

A venetian blind assembly includes a headrail, a horizontal venetian blind, and a coiling mechanism for controlling coiling and release of a transmission cord having a first end connected to the coiling mechanism and a second end fixed to the horizontal venetian blind. A box is mounted on a side of the coiling mechanism. The transmission cord extends through the box. A shaft is mounted between two brackets in the box. A wheel is mounted around the shaft and includes a plurality of teeth. A shaft rotating member is mounted between the two brackets and includes a pressing/engaging plate normally located between two adjacent teeth of the wheel under action of gravitational force. The first end of the transmission cord is wound around the shaft and then extends away from the shaft in a direction opposite to a downward swaying direction of the pressing/engaging plate.

The invention refers to a system comprising a Venetian blind or the like housed within a double glazing or a double glass. The blind comprises a multiplicity of slats movable by means of a shaft rotatable around a longitudinal axis thereof and housed in a rolling-shutter box of the double glazing. The closure system comprises means for rotating the shaft around the longitudinal axis thereof. The rotation means are housed in a lateral profile of the double glazing and are commanded by a slider translatable between an upper end stop, at which the blind is completely raised, and a lower end stop, at which the blind is completely lowered. The closure system further comprises a first mechanism which prevents a movement of the blind until, during the transport or assembly of the closure system, the rolling-shutter box is disconnected from the lateral profile. The first blocking mechanism comprises three pins that can be rotated, together with the shaft, around the longitudinal axis thereof, and that can be translated between a first position at which the three pins are housed in three respective seats obtained in the cap of the rolling-shutter box, and a second position in which the three pins lie outside said seats. While the rolling-shutter box is disconnected from the lateral profile, the three pins are housed in the respective seats so as to prevent a rotation of the shaft for moving the slats. The closure system also comprises three counter-pins integrally connected to the lateral profile and arranged in a manner so as to push the three pins outside the respective seats upon connection of the rolling-shutter box to the lateral profile, so as to allow a rotation of the shaft for moving the slats. The closure system finally comprises a second mechanism for blocking the slider when the latter is situated at the upper end stop, i.e. when the blind is completely raised.

The invention refers to a system comprising a Venetian blind or the like housed within a double glazing or a double glass. The blind comprises a multiplicity of slats movable by means of a shaft rotatable around a longitudinal axis thereof and housed in a rolling-shutter box of the double glazing. The closure system comprises means for rotating the shaft around the longitudinal axis thereof. The rotation means are housed in a lateral profile of the double glazing and are commanded by a slider translatable between an upper end stop, at which the blind is completely raised, and a lower end stop, at which the blind is completely lowered. The closure system further comprises a first mechanism which prevents a movement of the blind until, during the transport or assembly of the closure system, the rolling-shutter box is disconnected from the lateral profile. The first blocking mechanism comprises three pins that can be rotated, together with the shaft, around the longitudinal axis thereof, and that can be translated between a first position at which the three pins are housed in three respective seats obtained in the cap of the rolling-shutter box, and a second position in which the three pins lie outside said seats. While the rolling-shutter box is disconnected from the lateral profile, the three pins are housed in the respective seats so as to prevent a rotation of the shaft for moving the slats. The closure system also comprises three counter-pins integrally connected to the lateral profile and arranged in a manner so as to push the three pins outside the respective seats upon connection of the rolling-shutter box to the lateral profile, so as to allow a rotation of the shaft for moving the slats. The closure system finally comprises a second mechanism for blocking the slider when the latter is situated at the upper end stop, i.e. when the blind is completely raised.

An actuating system for a window shade includes a fixed support shaft, a rotary drum pivotally connected with the support shaft, the rotary drum being rotatable for winding or unwinding a shading structure, and a limiting mechanism disposed inside the rotary drum and including a threaded portion provided on the support shaft, a stop portion, a limiting part, and a follower engaged with the threaded portion, the stop portion and the limiting part being respectively disposed adjacent to a first and a second end of the threaded portion, and the follower being rotationally coupled to and slidable relative to the rotary drum. The rotary drum is rotatable in a first direction to drive the follower to slide toward a first position for engagement with the limiting part, and in an opposite second direction to drive the follower to slide toward a second position for engagement with the stop portion.

An actuating system for a window shade includes a fixed support shaft, a rotary drum pivotally connected with the support shaft, the rotary drum being rotatable for winding or unwinding a shading structure, and a limiting mechanism disposed inside the rotary drum and including a threaded portion provided on the support shaft, a stop portion, a limiting part, and a follower engaged with the threaded portion, the stop portion and the limiting part being respectively disposed adjacent to a first and a second end of the threaded portion, and the follower being rotationally coupled to and slidable relative to the rotary drum. The rotary drum is rotatable in a first direction to drive the follower to slide toward a first position for engagement with the limiting part, and in an opposite second direction to drive the follower to slide toward a second position for engagement with the stop portion.

A motorized window treatment system may include a roller tube, a flexible material, a motor drive unit, and mounting brackets. The mounting brackets may include a stationary portion configured to be attached to a structure surrounding a window. The mounting brackets may include a movable portion configured to receive an end portion of a housing of a motor drive unit. The movable portion may be configured to operate the motorized window treatment between the operating position and the extended position in a circular-shaped path. A portion of the motor drive unit may be accessible when the motorized window treatment is in the extended position. The mounting brackets may include a stopping mechanism that is configured to prevent the motorized window treatment from extending beyond the extended position.