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What aspects do children need to pay attention to in the design of decompression knapsack?

  • Release date : 2018-09-25 10:05
  • Click : 192
    According to physics, "the principle that swinging work is greater than rest" and "the lower the center of gravity, the more stable the body is, the less work is done", we can see from the skeletal structure of the human body, in the course of walking, remove swinging bones (below the femur), the lowest center of gravity of the bone for the hip (coccyx, sacrum can not). As a weight-bearing skeleton. The backpack we usually use is a two-shoulder backpack. The weight is transferred through the clavicle and scapula through the thoracic vertebra to the hip, while the belt-added backpack reduces the transfer process by shifting most of the weight of the bag directly from the hip. At the same time, the increase of the ribbon can transfer the weight of the clavicle to the sternum, effectively reducing shoulder muscle fatigue. Excellent bags are designed with a backpack system that adjusts the height of the backpack according to the length of the thoracic spine, allowing the weight of the upper part of the backpack to spread evenly over the back muscles, rather than relying on the shoulder strap "strangled" on the shoulder.
According to this principle, when choosing bags, we must pay attention to the "belt", "chest belt", "shoulder belt" and "shoulder system".

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