CONCEALED TYPE VENETIAN BLIND LIFTING CONTROL MECHANISM

摘要

A concealed type Venetian blind lifting control mechanism is constructed to include a lift cord roll-up unit, the lift cord roll-up unit including a transmission shaft, two lift cord roll-up members synchronously rotated with the transmission shaft to roll up/let off the lift cords of the Venetian blind, and two stop members fixedly mounted on the transmission shaft, and a lift cord lock adapted to lock the transmission shaft. The lift cord lock includes a second stop member, two stop rods moved with the second stop member relative to the stop members of the lift cord roll-up unit to lock/unlock the transmission shaft, and spring member, which supports the second stop member in the engagement position.