Abstract: A cord-lock mechanism to take up or expand slats of Venetian blind, comprising a fixed hollow drum with an end cover secured to window frame or door frame; a pulley block fixed in the hollow drum, a pulley at the pulley block, a brake wheel reciprocally movable between a braking position and a release position in a guide channel formed on the pulley block; and a lift cord made of soft material, wound around the brake wheel and the pulley, having its both ends extended to the respective ends of the headrail, passed through the middle cord outlets, turned downwards and tied to the respective ends of the foot rail so that all or part of the slats and the tubular foot rail can be raised and the slats can be taken up by pulling of the lift cord.

Abstract: A rotary tubular headrail blind comprising a tubular headrail with plurality of suspending ladder sets to support a plurality of horizontal slats in parallel, a tubular foot rail, a tilter to rotate the tubular headrail directly, a lifter to raise the tubular foot rail to any desired level, and a holder with two ends to tie each ladder set's inner and outer ladder tapes to maintain the inner and outer ladder tapes close and parallel with each other when the tubular headrail is rotated so that all slats are kept in a same tilting degree.