| 摘要 |
A backpack having one or more belt structures that can be quickly adjusted to fit persons of different physical size (fat or thin). Each belt structure includes a flexible belt element wound a multiple number of turns around a rotary reel located within a small housing disposed on the frontal side area of the person wearing the backpack. A spiral clock spring within the housing exerts a force on the reel tending to pull the belt element into the housing, such that the belt structure adapts to an individual person's torso measurements. The backpack would enjoy primary usage by firefighters who may need to fasten the backpack in place very quickly in order to move into a fire zone where equipment attached to the backpack is useful or essential.
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