BRAKE DEVICE FOR CORDLESS LIFT SHADES

摘要

A covering for an architectural opening including a first rail, a second rail moveable relative to the first rail, and a lift assembly coupled to the first rail. The lift assembly includes a drum rotatable about an axis, and a brake selectively engageable with the drum. The brake automatically engages the drum to resist the second rail moving away from the first rail; and the brake automatically disengages the drum in response to the second rail moving toward the first rail.