| 摘要 |
PROBLEM TO BE SOLVED: To provide a sack wherein close joint property between a connecting region and the human body is increased by making the connecting region between a sack body section and a shoulder belt part three-dimensional, and the carrying-on-the-back property can be improved. SOLUTION: For this sack, the shape of a connecting part 21 on the sack body section side, and the shape of a connecting part 31 on the shoulder belt part side are formed into a curved shape having a curvature in the connecting region 4 between the sack main body section 2 and the shoulder belt part 3. Then, the curvature of the connecting part 21 on the sack main body section side is formed by a smaller curvature compared with the curvature of the connecting part 31 on the shoulder belt part side. Thus, the sack is constituted in such a manner that swelling is imparted to the connecting region 4 when both parts are integrated. COPYRIGHT: (C)2005,JPO&NCIPI
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