Curtain cord winding device

A curtain cord winding device, comprising:

• a base forming a screw hole;
• a cord winding mechanism rotatably mounted to the base;
• and
• a drive mechanism for driving the cord winding mechanism to rotate, wherein the drive mechanism comprises a drive shaft;
• wherein the cord winding mechanism comprises a main reel fitted about the drive shaft and fixed relative to the drive shaft in a circumferential direction, and at least one secondary reel, the main reel comprises a first winding segment for winding a cord, and a screw segment connected to an end of the first winding segment and screwed to the screw hole of the base;
• wherein the main reel and the at least one secondary reel are coaxially arranged and are fixed in turn, each of the at least one secondary reel comprises a second winding segment with a same structure as the first winding segment, and a first connecting member arranged at an end of the second winding segment;
• wherein the main reel and the at least one secondary reel are screwed to the base only through the screw segment of the main reel being screwed to the screw hole;
• and
• wherein an end of the first winding segment away from the screw segment and an end of the second winding segment away from the first connecting member each is provided with a second connecting member, the first connecting member on each of the at least one secondary reel is fixed to the second connecting member on an adjacent one of the main reel and the at least one secondary reel in an axial direction.