A spring loaded tensioning device for tensioning a flexible blind control element loop to be secured in position on a building , and having a housing shell; a hinged door on the housing shell operable between an open position for insertion of the control element and a closed position, a moveable lock in the housing shell, moveable between a locking position in which it clamps onto the element, and a released position in which the lock is free of the control element; and, a spring urging the lock to clamp onto the control element.

The invention relates to an operating device (1) for a screen, comprising: a first operating mechanism with a first operating element (7) which is connected to a first movement transfer element connected by means of a first transmission to a drive element (60) for a screen shaft. The first operating mechanism is configured to convert a linear movement of the first operating element to a rotational movement of the drive element for operating the screen shaft in a first rotational direction (R). The operating device (1) further comprises a second operating mechanism comprising a second operating element (8) which is connected to a second movement transfer element connected by means of a second transmission to the drive element (60). The second operating mechanism is configured to convert a linear movement of the second operating element to a rotational movement of the drive element for operating the screen shaft in a second rotational direction (L) opposite to the first rotational direction.

The window shade system may comprise a support connector and/or a first shade band. An adjustment arm may interface with the support connector and/or the first shade band. The adjustment device interfaces with the adjustment arm, wherein in response to adjusting the adjustment device, the adjustment arm is configured to rotate and adjust the support connector and/or the first shade band to an adjusted position.

The window shade system may comprise shade fabric with a first portion and a second portion. A rod may be configured to include the second portion of the shade fabric rolled around the rod. A hembar may receive the rod within a compartment of the hembar, wherein the compartment includes a first surface and a second surface, and wherein the rod and the second portion of the shade fabric rolled around the rod are supported between the first surface and the second surface.

A covering for an architectural opening includes a bracket, a shaft coupled to the bracket, and a roller assembly coupled to the bracket, the roller assembly including, a material roll with a covering material, and a drive roller drivingly coupled to the material roll and operable to rotate with respect to the bracket about a first rotational axis, wherein the covering material includes a first portion that extends between the material roll and the shaft.

The invention discloses a curtain controller comprising a cover plate, a housing, a clutch head, a clutch device, a pushing device and a pull rope; wherein the pull rope drives the pushing device for forward movement to push the clutch device to be engaged with the clutch head; and after the pull rope is released, the pushing device moves backward to drive the clutch device to be disengaged with the clutch head and the pull rope is wound onto the pushing device. The curtain controller of the invention has a simple structure and few parts and components to reduce the production cost, and provides simple operation to facilitate maintenance and replacement when a fault occurs.

A blind for a building opening having a first blind roller located in an upper region of a head rail, a second blind roller located in a lower region of the head rail, a first blind stored on the first blind roller, a second blind stored on the second blind roller, a first blind control guided forwardly and operable to lower and raise said first blind, and a second blind control guided forwardly and operable to lower and raise said second blind.

A window covering auxiliary device includes at least one attracted member, an operation handle and at least one attracting member. The at least one attracted member is mounted on a window covering. The operation handle includes a holding unit and a guiding unit. The guiding unit is mounted on the holding unit and has a top provided with a guide portion which is provided with a receiving recess. The at least one attracting member is mounted in the receiving recess of the operation handle. The at least one attracting member and the at least one attracted member are magnetically attracted with each other.

A cord winder spindle cover housing, wherein the housing is mountable onto a spindle, and said housing has (i) a drive portion for receiving a cord that controls the extension and retraction of a blind and (ii) at least one opening through which the cord passes, the opening defined by a pair of spaced but opposing convex surfaces.

A winding shaft drive (1, 1A, 101, 101A, 102, 102A) is arranged for operating a retractable covering for an architectural opening. The winding shaft drive includes an at least partially hollow winding shaft (7); a driving member (3, 103) for inducing rotation to the winding shaft; and a shaft brake adapted to be operated by the driving member. The shaft brake includes a preassembled module (5) for accommodation in the at least partially hollow winding shaft (7) and has first coupling means (67) on one axial end thereof for transmitting rotative forces and second coupling means (69) on the same one axial end for transmitting non-rotative stationary forces. The driving member has a driving hub (11, 111) for removably coupling to the first coupling means (67) and a stationary connector (17, 17A, 117, 117A) for removably coupling to the second coupling means (69). A shaft brake module (5) and a driving member (3, 103) are specifically adapted for use in the winding shaft drive.