Patent ID: 7178576

Claim:
A cord member control device for a Venetian blind that comprises at least two lift cords, at least two ladder tapes each having a front tape and a rear tape, and a bottom rail having a plurality of mounting holes corresponding to said lift cords and said ladder tapes, said cord member control device comprising: a pulley assembly mounted in said bottom rail, said pulley assembly holding at least one wheel over which said lift cord passes; and a locating member having a first end connected to said pulley assembly, a second end inserted through the mounting hole of said bottom rail and extended to outside of said bottom rail, a recessed open chamber formed in said second end, and a transverse through hole extended across said recessed open chamber for the passing of the front tape and rear tape of said ladder tape for enabling the front tape and rear tape to be fastened together in said recessed open chamber, wherein the locating member comprises a locating slot for the passing of the lift cord.