Supporting unit

A supporting unit, comprising:

• a first part, comprising a first connecting member and a supporting member, wherein the supporting member is detachably connected to the first connecting member;
• a second part, wherein the first connecting member is rotatably connected to the second part;
• and
• an adjusting module, disposed in the first part and the second part, wherein the adjusting module comprises a rod body, a friction component, and an adjusting member, the rod body is connected to the second part along an axis, the friction component is movably connected to the rod body and is located between the first connecting member and the adjusting member, the first part generates a frictional force with the second part through the adjusting module, and the adjusting member is movably connected to the rod body to adjust the frictional force,
• wherein the second part comprises a second connecting member and a headband, the headband is connected to the second connecting member, the first connecting member is rotatably connected to the second connecting member, and the first connecting member generates the frictional force with the second connecting member,
• wherein the second connecting member comprises a sliding groove, the first connecting member comprises a protruding part, and the protruding part is slidably connected to the sliding groove,
• the sliding groove surrounds the axis, the protruding part is connected to the sliding groove and configured to rotate relative to the second connecting member with the axis as a rotation axis.