| 摘要 |
PURPOSE: A backpack having an air cushion seat back is provided to reduce the weight of a cushion seat back and to continuously maintain the elasticity of a cushion. CONSTITUTION: A backpack having an air cushion seat back comprises a main body containing articles, a cushion seat back(200), and a shoulder cushion(310). The cushion seat back elastically supports the back of a wearer. The shoulder cushion is equipped in a shoulder-strap connected to both sides of the main body and elastically supports the shoulder of the wearer. The cushion seat back is composed of a seat back base sheet, a seat back elastic sheet, an air pump, and a valve member. |
