Mechanism for winding cord

A mechanism for winding a cord comprising:

• a storage space in which a cord is wound around a central axis,
• wherein the storage space includes
• a first storage space which is provided to allow the cord to be wound in one row in a predetermined direction intersecting a direction of the central axis, and the first storage space having a first height in a direction perpendicular to the predetermined direction, the first height being substantially the same as a diameter of the cord, and
• a second storage space which is provided on one or both of an outer circumference and an inner circumference of the first storage space and has a second height along the direction of the central axis, the second height being at least twice the diameter of the cord, the second storage space being provided to allow the cord to be wound in a plurality of rows along the central axis,
• wherein the second storage space has a second width in a direction perpendicular to the central axis, the second width being substantially the same as the diameter of the cord.