Blind lifting device and a blind lifting control module thereof

A blind lifting control module connectable with an end of a horizontal axle for controlling rotation of the axle, comprising:

• a supporting unit including a base seat and a mounting shaft which is securely connected with said base seat and which extends parallel to the horizontal axle from said base seat, said mounting shaft having a shaft portion;
• a transmitting wheel rotatably sleeved on said mounting shaft, and including an axle connecting body which is securely connectable with the end of the horizontal axle, and a flange disc which is connected with a side of said axle connecting body proximate to said base seat and which extends radially and outwardly from said axle connecting body, said axle connecting body having a receiving groove which extends from said side for receiving said shaft portion, and an inner peripheral wall which surrounds said receiving groove, said flange disc having a wheel ratchet portion which is formed on a surface that faces said base seat and surrounds said receiving groove;
• an anti-backward unit including a torsion spring which is received in said receiving groove and which surrounds said shaft portion, said torsion spring being operable and deformable relative to said inner peripheral wall between a tightened state, where said torsion spring is in tightly frictional engagement with said inner peripheral wall to permit a uni-directional rotation of said transmitting wheel, and a released state, where said torsion spring is disengaged from said inner peripheral wall, said torsion spring having an outer diameter in the released state which is smaller than that in the tightened state;
• and
• a driving unit including a driving reel which is rotatably sleeved on said shaft portion, a transmitting member which is connected between said driving reel and said anti-backward unit to transmit a rotation of said driving reel to shift said torsion spring from the tightened state to the released state, a thrust member which is movably disposed to said base seat, a hindering member which is pivotably disposed to said base seat, a pull cord which has an end secured to said driving reel and which winds on a periphery of said driving reel to have a free end for pulling operation, and a reel biasing member,
• said driving reel having a reel ratchet portion which faces said wheel ratchet portion and being movable relative to said shaft portion between a driving position, where said reel ratchet portion meshes with said wheel ratchet portion, and a normal position, where said reel ratchet portion is disengaged from said wheel ratchet portion, said thrust member being movable relative to said base seat between an initial position, where said thrust member is free from action with said driving reel, and a thrusting position, where said thrust member provides a thrust force to move said driving reel to the driving position, said hindering member being turnable relative to said base seat between a hindering position, where said hindering member is kept to position said thrust member in the initial position, and a keeping-off position, where said thrust member is allowed for movement to the thrusting position, said free end of said pull cord passing through said hindering member to receive a pulling force to turn said hindering member, said reel biasing member being disposed to bias said driving reel to rotate to reel said pull cord.