Concealed type lifting control mechanism for venetian blind

• Main Authors: Chung, Yung-Chen, Hsu, Ya-Wei, Chen, Chin Cheng
• Format: Patent
• Language: English
• Published: 10.06.2003

The present invention relates to Venetian blinds and, more specifically, to a concealed type lifting control mechanism for Venetian blind, which keeps the ends of the lift cords of the Venetian blind from sight. A concealed type lifting control mechanism installed in a Venetian blind and adapted to control lifting of the lift cord of the Venetian blind comprises at least two take-up reel sets that provide a predetermined spring release force and are connected to the lift cord to impart a roll-up prestress to the lift cords for taking up the lift cords, a synchronizing transmission unit coupled to the at least two take-up reel sets for enabling the at least two take-up reel sets to be work synchronously, and a positioning device set provided between the take-up reel sets and moved between an engagement position and a release position to determine the provision of the roll-up prestress, for enabling the lift cords to be moved to adjust the Venetian blind to the desired elevation.