Spool and lacing module provided with same

A spool comprising:

• a shaft rotatable about a central axis extending vertically;
• a trunk portion which includes a lower portion to which the shaft is connected and a radially outer surface around which a string material is wound;
• and
• an upper lid portion which is on an upper surface of the trunk portion;
• wherein
• the trunk portion includes:
• a groove portion which is recessed axially downward from an upper surface, extends in a radial direction, and is provided with the string material;
• and
• a first base portion and a second base portion which are provided with the groove portion interposed therebetween side by side in a radial direction;
• the first base portion includes a first protruding portion protruding toward the second base portion;
• the second base portion includes a second protruding portion protruding toward the first base portion;
• the first protruding portion and the second protruding portion are on opposite sides with respect to the central axis in a direction in which the groove portion extends;
• and
• the upper lid portion and the trunk portion are fixed via a fixing portion on at least one of the first base portion and the second base portion.