A secondary control device for a venetian blind assembly includes an elongated main body having a plurality of loops extending outward at uniform distances. Each of the loops is pivotally connected to a slat engagement member having a frame and a slat connector. The slat connector includes a body section having an adhesive along the top surface, and a removable covering layer for protecting the adhesive until the device is ready to be installed. When the slat engagement members are secured onto a group of slats, movement of the main body causes the group of slats to transition between the open position and the closed position without affecting the position of the remainder of the blind assembly.

A secondary control device for a venetian blind assembly includes an elongated main body having a plurality of loops extending outward at uniform distances. Each of the loops is pivotally connected to a slat engagement member having a frame and a slat connector. The slat connector includes a body section having an adhesive along the top surface, and a removable covering layer for protecting the adhesive until the device is ready to be installed. When the slat engagement members are secured onto a group of slats, movement of the main body causes the group of slats to transition between the open position and the closed position without affecting the position of the remainder of the blind assembly.

An angle adjusting mechanism for blinds blades has a main body and a driving unit. The worm gear of the driving unit is housed in the first container of the main body, and the worm and the connecting rod of the driving unit are positioned in the second container of the main body. The worm and the worm gear engage with each other, and the pivot extension at the end of the connecting rod is located at the second opening of the main body and does not protrude from the main body, which avoids transportation damage and greatly reduces the volume of the adjustment mechanism. For the purpose of quick disassembly and assembly, the driving rod of the driving unit is also assembled with the connecting rod, and of the driving rods are designed with several different sizes, so that the adjusting mechanism can change the driving rod at according to the size of the blinds blades.

A slat includes two through holes each provided at its periphery wall with a first wall surface and a second wall surface. First and second teeth protrude from the front and rear ends of the first wall surface towards the second wall surface. The distances between the first and second teeth and the second wall surface are smaller than the diameter of a lifting cord. A third tooth staggered with the first tooth and a fourth tooth staggered with the second tooth protrude from the front and rear ends of the second wall surface towards the first wall surface. The distances between the third and fourth teeth and the first wall surface are smaller than the diameter of the lifting cord. As such, the slat prevents a rope loop from being enlarged for enhancing the safety of use.

An actuating system includes an actuating wheel coupled to an operating element, an axle coupling part disposed substantially coaxial to the actuating wheel and rotatable for raising or lowering a bottom part of a window shade, and a clutching part carried with a carrier and movably linked to the actuating wheel. The clutching part is movable between a retracted state for disengaging from the axle coupling part and an extended state for engaging with the axle coupling part. The actuating wheel is rotatable in a first direction to urge the clutching part to move from the retracted state to the extended state and drive the carrier and the axle coupling part to rotate in unison, and in a second direction to urge the clutching part to move from the extended state to the retracted state so that the actuating wheel is rotationally decoupled from the axle coupling part.

The invention relates to an assembly of a tilt control cord (106) and a fastening element (1) for fastening to a slat (102A) of a window covering. The fastening element has an elongate body with a length corresponding to the width of the slat. The fastening element includes second fastening means for attaching the ends of the tilt control cord.

The invention also relates to a window covering having a cord spool (104), wherein the tilt control cord (106) is wrapped around the cord spool (104) and extends to the top slat (102A) on which the fastening element (1) is attached.

The invention also relates to a method of assembling the window covering.

The invention relates to an assembly of a tilt control cord (106) and a fastening element (1) for fastening to a slat (102A) of a window covering. The fastening element has an elongate body with a length corresponding to the width of the slat. The fastening element includes second fastening means for attaching the ends of the tilt control cord.

The invention also relates to a window covering having a cord spool (104), wherein the tilt control cord (106) is wrapped around the cord spool (104) and extends to the top slat (102A) on which the fastening element (1) is attached.

The invention also relates to a method of assembling the window covering.

A window blind includes a headrail, a covering assembly including a plurality of slats and a bottom rail, a lifting mechanism including a driving module and a lift cord assembly operably connected to the driving module, a tilt mechanism adapted to drive the slats to rotate, and an auxiliary unit provided between the tilt mechanism and the lifting mechanism. The lift cord assembly is connected to the bottom rail for expanding or folding the covering assembly. The covering assembly is in a first state when each and every one of the slats is substantially parallel to each other and correspondingly rotatable by the tilt mechanism, and is in a second state otherwise. When the covering assembly is in the second state, the auxiliary unit is drivable by the tilt mechanism to make the lifting mechanism further release the lift cord assembly, changing the covering assembly into the first state again.

A window blind includes a headrail, a covering assembly including a plurality of slats and a bottom rail, a lifting mechanism including a driving module and a lift cord assembly operably connected to the driving module, a tilt mechanism adapted to drive the slats to rotate, and an auxiliary unit provided between the tilt mechanism and the lifting mechanism. The lift cord assembly is connected to the bottom rail for expanding or folding the covering assembly. The covering assembly is in a first state when each and every one of the slats is substantially parallel to each other and correspondingly rotatable by the tilt mechanism, and is in a second state otherwise. When the covering assembly is in the second state, the auxiliary unit is drivable by the tilt mechanism to make the lifting mechanism further release the lift cord assembly, changing the covering assembly into the first state again.

An angle adjusting mechanism for blinds blades has a main body and a driving unit. The worm gear of the driving unit is housed in the first container of the main body, and the worm and the connecting rod of the driving unit are positioned in the second container of the main body. The worm and the worm gear engage with each other, and the pivot extension at the end of the connecting rod is located at the second opening of the main body and does not protrude from the main body, which avoids transportation damage and greatly reduces the volume of the adjustment mechanism. For the purpose of quick disassembly and assembly, the driving rod of the driving unit is also assembled with the connecting rod, and of the driving rods are designed with several different sizes, so that the adjusting mechanism can change the driving rod at according to the size of the blinds blades.