| 摘要 |
<p>A back bag such as a back pack, knapsack or a rucksack has a bottom-equipped bag portion (10), a pair of shoulder straps (14) provided on the body-contact side of the bag portion and adapted to be hung from the user's shoulders, and a substantially V-shaped frame (20) provided on the body-contact side of the bag portion. The frame has both wing portions extending from the lower end apex of the V-form located in a region near the lower end of the backbone of the user's body. The wings being elastically deformable independently of each other with respect to the lower end apex of the V-form of the frame. The weight load is distributed over the area of the user's back, as well as to the shoulders. The frame is plastically deformable in conformity with the geometry of the user's back, so that the bag portion is held in close contact with the user's back without jumping or slipping sideways during a long-distance walk or climbing. <IMAGE></p> |
