Head protection device and carrier

A head protection device for wrapping a shoulder belt of a carrier and a length adjustment device of the carrier, wherein the shoulder belt is directly or indirectly connected to a backrest of the carrier and a seat of the carrier, and the shoulder belt is wound around the length adjustment device, the length adjustment device is slidable relative to the shoulder belt along a length extension direction of the shoulder belt, wherein the head protection device comprises:

• a protection sheet, including a first part located between the length adjustment device and the backrest;
• and
• a limiting structure, which is arranged on the first part;
• wherein the shoulder belt passes through the protection sheet twice in opposite directions at at least one position on the first part through the limiting structure, the protection sheet is slidable relative to the shoulder belt along the length extension direction of the shoulder belt, the length adjustment device is connected to the protection sheet through the shoulder belt, and a slide of the protection sheet drives the length adjustment device to synchronously slide with the protection sheet.