Provided is an extendable rail, comprising a main rail and an auxiliary rail arranged in parallel with the main rail, the main rail is shifted in longitudinal direction relative to the auxiliary rail, wherein the main rail is configured with a driving wheel and a first reverse wheel; the auxiliary rail is configured with a second reverse wheel, a first guiding wheel and a second guiding wheel arranged inside; a belt loop with fixed length wraps around the driving wheel, the first reverse wheel, the first guiding wheel, the second reverse wheel, the second guiding wheel, and the driving wheel in turn. The total length of the extendable rail can be adjusted according to the practical needs of consumers by adjusting the length of the overlapped area of the main rail and the auxiliary rail, which provides easy adjustment, high universal applicability and operation performance without size customization.

Provided is an extendable rail, comprising a main rail and an auxiliary rail arranged in parallel with the main rail, the main rail is shifted in longitudinal direction relative to the auxiliary rail, wherein the main rail is configured with a driving wheel and a first reverse wheel; the auxiliary rail is configured with a second reverse wheel, a first guiding wheel and a second guiding wheel arranged inside; a belt loop with fixed length wraps around the driving wheel, the first reverse wheel, the first guiding wheel, the second reverse wheel, the second guiding wheel, and the driving wheel in turn. The total length of the extendable rail can be adjusted according to the practical needs of consumers by adjusting the length of the overlapped area of the main rail and the auxiliary rail, which provides easy adjustment, high universal applicability and operation performance without size customization.

The invention relates to an electric housing device having an adjustable span, comprising a main body portion, a winding cord, and a first moving part and a second moving part close to the two ends of the main body portion. The main body portion is provided with a driving device, and the bottom of the main body portion is provided with two parallel slide rails which slide along the length direction of the main body portion. The two slide rails extend towards the first moving part and the second moving part respectively and are fixed to the bottoms of the corresponding moving parts. The main body portion and the first moving part, and the main body portion and the second moving part are respectively provided with through grooves corresponding to the two slide rails, each through groove is located on the outside of the corresponding slide rail, each slide rail is slidably provided with a central running pulley, and the top of each central running pulley extends out from the corresponding through groove. The winding cord revolves around the driving device, the main body portion, the first moving part and the second moving part for one circle and winds around the driving device for several circles. The tops of the central running pulleys are fixed to the winding cord. The device is adjustable in terms of span, widely applicable and light in weight.

The invention relates to an electric housing device having an adjustable span, comprising a main body portion, a winding cord, and a first moving part and a second moving part close to the two ends of the main body portion. The main body portion is provided with a driving device, and the bottom of the main body portion is provided with two parallel slide rails which slide along the length direction of the main body portion. The two slide rails extend towards the first moving part and the second moving part respectively and are fixed to the bottoms of the corresponding moving parts. The main body portion and the first moving part, and the main body portion and the second moving part are respectively provided with through grooves corresponding to the two slide rails, each through groove is located on the outside of the corresponding slide rail, each slide rail is slidably provided with a central running pulley, and the top of each central running pulley extends out from the corresponding through groove. The winding cord revolves around the driving device, the main body portion, the first moving part and the second moving part for one circle and winds around the driving device for several circles. The tops of the central running pulleys are fixed to the winding cord. The device is adjustable in terms of span, widely applicable and light in weight.

The arrangement for dispensing a curtain using an extendable tube with mating rods and cartridges provides an expedient and convenient method for mounting, changing and removing curtains. It consists primarily of an extendable tube housing a cartridge for dispensing a curtain that is pre-assembled with attached circular balls and a guide piece. The cartridge is attached to mating rods that can be adjusted as needed to attach or remove additional cartridges. The user pulls the guide piece in a downward direction to release the curtain from the release chamber of the extendable tube. The circular balls spread along the sliding tracks of the extendable tube and the user can then spread the curtain as desired.

The arrangement for dispensing a curtain using an extendable tube with mating rods and cartridges provides an expedient and convenient method for mounting, changing and removing curtains. It consists primarily of an extendable tube housing a cartridge for dispensing a curtain that is pre-assembled with attached circular balls and a guide piece. The cartridge is attached to mating rods that can be adjusted as needed to attach or remove additional cartridges. The user pulls the guide piece in a downward direction to release the curtain from the release chamber of the extendable tube. The circular balls spread along the sliding tracks of the extendable tube and the user can then spread the curtain as desired.

A curtain changing apparatus and method of use thereof includes a curtain retrieval arm engageable with a curtain track to allow the transfer of a curtain between the curtain track and the curtain retrieval arm. A removable insert is adapted to bridge the full or partial cutout section of the curtain track for normal use of the track, and an insert retrieval tool is adapted to enable removal and replacement of the insert from ground level.

A curtain changing apparatus and method of use thereof includes a curtain retrieval arm engageable with a curtain track to allow the transfer of a curtain between the curtain track and the curtain retrieval arm. A removable insert is adapted to bridge the full or partial cutout section of the curtain track for normal use of the track, and an insert retrieval tool is adapted to enable removal and replacement of the insert from ground level.

The present invention relates to an assembling curtain rail including at least two corresponding fast-assembling rails and a rail connection piece used for connecting the two fast-assembling rails. An upper end and a lower end of the two sides of the fast-assembling rails are connected with upper fixing plates and a lower fixing plate, respectively. An inner side wall of the lower fixing plates has a guiding recess, and the rail connection piece is provided with a guiding protruding block cooperating with the guiding recess correspondingly. The guiding protruding block is located in the lower guiding slot. Via the connection and cooperating between the guiding recess and the guiding protruding block, the connection of the curtain rail is more firm, stability is better, and the usage safety is ensured.

The present invention relates to an assembling curtain rail including at least two corresponding fast-assembling rails and a rail connection piece used for connecting the two fast-assembling rails. An upper end and a lower end of the two sides of the fast-assembling rails are connected with upper fixing plates and a lower fixing plate, respectively. An inner side wall of the lower fixing plates has a guiding recess, and the rail connection piece is provided with a guiding protruding block cooperating with the guiding recess correspondingly. The guiding protruding block is located in the lower guiding slot. Via the connection and cooperating between the guiding recess and the guiding protruding block, the connection of the curtain rail is more firm, stability is better, and the usage safety is ensured.