Detachable cord rolling device for non-pull cord window blind

A detachable cord rolling device for a non-pull cord window blind, the detachable cord rolling device comprising:

• a cord rolling unit having a first base, a first torsion spring gear, a second torsion spring gear, a first torsion spring, at least one cord rolling gear and at least one lift transmission cord, the first and second torsion spring gears being rotatably disposed on the first base and engaged with each other, the first torsion spring connecting the first and second torsion spring gears, the at least one cord rolling gear being rotatably disposed on the first base and engaged with one of the first and second torsion spring gears, the at least one lift transmission cord being wound around the at least one cord rolling gear;
• an auxiliary driving unit having a second base, a third torsion spring gear, a fourth torsion spring gear and a second torsion spring, the second base being detachably disposed on a top surface of the first base of the cord rolling unit, the third and fourth torsion spring gears being rotatably disposed on the second base and engaged with each other, the second torsion spring connecting the third and fourth torsion spring gears;
• and
• a transmission shaft detachably connecting the first torsion spring gear of the cord rolling unit and the third torsion spring gear of the auxiliary driving unit, thereby enabling the first and third torsion spring gears to rotate synchronously.