Backpack

Abstract

The invention discloses a knapsack. The knapsack comprises a knapsack body, the back plate is detachably and fixedly connected to the back surface of the bag body, and the position of the back plate is suitable for being adjusted in the height direction relative to the bag body; the back plate is provided with a vertical slide way, and the lower edge of the back plate does not exceed the lower edge of the bag body all the time; the first spring is arranged in the slide way; the second spring is arranged in the slide way and is positioned below the first spring; the sliding part is arranged in the slide way in a sliding manner, and is configured to abut against the first spring and compress the first spring when sliding upwards, and hook the second spring and stretch the second spring when sliding upwards to exceed a preset position; one end of the strap is fixedly connected to the bottom of the bag body, and the other end of the strap is fixedly connected with the sliding piece; the backpack is effectively prevented from impacting the spine, and the good effect of relieving pressure is achieved.

Description

technical field [0001] The invention relates to the field of backpacks, in particular to a backpack. Background technique [0002] Students who are growing and developing grow faster in height. Today's backpacks, on the one hand, cannot match a suitable backpack according to their height in real time, and an unsuitable backpack is heavy due to its heavy weight. During the carrying process, due to the ups and downs of the backpack, it constantly bumps. The spine, especially the caudal vertebra, causes irreversible physiological damage; on the other hand, the cost of frequently replacing the backpack is relatively high, therefore, the existing backpack is in urgent need of further improvement. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background art, and to provide a backpack with an adjustable relative position between the backpack and the wearer, so as to avoid hitting the s...

AI Technical Summary

Problems solved by technology

[0002] The height of students who are in growth and development grows faster. On the one hand, today's backpacks cannot match the right backpack according to their height in real time. The unsuitable backpack is heavy because of its heavy weight. During the carrying process, due to the ups and downs of the backpack, it is constantly hitting The spine, especially the caudal vertebra, causes irreversible physiological damage; on the other hand, the cost of frequent replacement of backpacks is relatively large, so the existing backpacks need to be further improved.

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