Abstract: An installation unit for installation to a rail of a window curtain assembly includes an elongate rack and multiple slots are defined through the rack. Multiple sliding members are connected to the rack. The sliding members are installed to the rail of the window curtain assembly. By removing the rack from the sliding members, the sliding members are remained in the rail of the window curtain assembly. The installation of the sliding members to the rail is easy and quick.

Abstract: A glider unit for pleated curtain comprises a sliding carriage and a fastener. The sliding carriage has a female snap-fit portion provided at its bottom for engaging with the fastener. The fastener has a combining section for fixing with a curtain fabric. The outer edge of the female snap-fit portion is formed as an arc segment, whereby the curtain fabric can be compliant with the arc segment so as to form regularly pleated pattern and smooth fabric surface during the closing of the curtain. Two pulleys pivotally coupled by a shaft are respectively mounted at both sides of each sliding carriage for moving on a curtain track. A plurality of balls are disposed between each pulley and the shaft so as to facilitate the rolling of each pulley without much application of force, so that opening and closing of the curtain can be accomplished in less laborious effort required.