Patent ID: 7665503

Claim:
A ladder drum for mounting in a head rail of a Venetian blind to secure a ladder cord or a tape ladder thereto, comprising: a drum body having a central shaft axially extended therethrough, the drum body having an upper portion formed into an open-topped recess having two sidewalls and an end wall interconnecting the two sidewalls; a holder set provided in the recess close to a central area thereof, such that a clearance is formed between the holder set and each of the two sidewalls, and a limiting space is formed between a rear side of the holder set and the end wall of the recess; and a rectangular, frame-shaped securing element having a first end, a second end pivotally turnably received in the limiting space, and two lateral sides, each lateral side interconnecting the first end to the second end, the first end being opposite to the second end and being releasably engaged with a front side of the holder set, each lateral side being disposed alongside a respective sidewall when the first end is engaged with the front side of the holder set and thereby clamps the ladder cord or tape ladder between a respective lateral side and a respective sidewall.