Retractable module

A retractable module comprising:

• a pair of bases spaced apart;
• a tube positioned between the pair of bases, the tube configured to rotate about its center axis relative to the pair of bases;
• a latch including one or more prongs, the latch being configured to move between a release position and a fixed position;
• a first spring being configured to urge the tube to rotate in a first direction, the first spring including a first end and a second end, the first end being fixed to not rotate with the tube, the second end being fixed to the tube and configured to:
• rest against at least one prong of the one or more prongs when the tube rotates in the first direction with the latch in the fixed position,
• rotate with the tube in the first direction when the latch is in the release position, and
• rotate with the tube in a second direction that is opposite the first direction when the latch is in the release position;
• and
• a sheet wrapped around the tube, the sheet being configured to:
• unwrap from around the tube as the tube rotates in the second direction, and
• wrap around the tube as the tube rotates in the first direction.