Pulling cord control device for window blind

A pulling cord control device for a window blind, the pulling cord control device comprising:

• a frame comprising a first seat and a second seat, which are connected with each other, and an accommodating space formed between the first seat and the second seat, the first seat comprising a first base, the second seat comprising a second base and at least one dividing rack integrally extending from the second base, the second base comprising an inner surface facing toward the first base, the dividing rack comprising two protruding base portions and a dividing plate, each of the protruding base portions protruding out of the inner surface of the second base, each of the protruding base portions having a connected part, the dividing plate being integrally connected with the connected parts of the two protruding base portions so that two cord passing grooves are formed on two opposite sides of the dividing plate respectively;
• a pulling cord control wheel set disposed in the accommodating space of the frame, the pulling cord control wheel set comprising at least two coil spring winding portions and at least one pulling cord winding portion, the pulling cord winding portion facing toward one of the cord passing grooves of the frame;
• and
• at least one coil spring wound around the coil spring winding portions of the pulling cord control wheel set;
• wherein the second base comprises an outer surface opposite to the inner surface, and at least one groove penetrating through the inner surface and the outer surface;
• the dividing rack is located in the groove;
• each of the protruding base portions extends from the outer surface of the second base, extends through the groove, and protrudes out of the inner surface of the second base;
• each of the protruding base portions has a recess recessed from the outer surface of the second base to the connected part.