| 摘要 |
PURPOSE: A multi-knapsack is provided to be used for multi-purpose, i.e. mattress, river-crossing equipment and sack, and to build an air tube of independent structure with secured stability so as to entirely inject fluid into the plural air cells just with a single valve, but not to burst them at the same time. CONSTITUTION: The multi-knapsack largely includes; a knapsack outer cover(100) in which a sack form is carried out by folding it according to prescribed rule, a tube pocket is arranged inside itself, and every accessory(300) such as shoulder strap(310), fastening belt(320), and upper and lower cap(330,340), etc. are arranged outside itself; and an air tube in which a tube pocket is built-in and a mattress is formed by injecting fluid in the spread state of the knapsack outer cover(100); wherein a valve pocket(150) is so arranged as to receive an air injecting pipe or an air injecting tube of an air tube from end point of longitudinally stitched line(101) to the lower end at the bottom of the knapsack outer cover and also a slide fastener(151) for the valve pocket(150) is installed.
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