PULL DOWN, PUSH UP, SHADE ASSEMBLY

摘要

A collapsible window covering capable of height adjustment, comprising, in combination, an upper elongated support, a lower elongated member that is adjustable up and down, and control lines extending downwardly to suspend said lower elongated member. A primary rotor structure at the upper elongated support entrains th e lines. Dual rotary members act on the lines to exert a counterbalancing suspension force on the lines at different window covering height adjusted levels. One dual rotary member exerts tensioning force on the lines and there is an S-shaped spring coupled to the dual rotary member acting to urge the one rotary members in a direction for windi ng the lines on the one rotary member. The upper elongated support includes a straight channel with a receptacle in the channel in which the dual rotary members and the spring are protectively carried. The channel orients the receptacle so that the lines i n the channel remain substantially aligned with the one rotary member in the receptacle.