Backrest for backpack

Abstract

This article is a sheet-shaped backrest that can be detachably attached to the back of a rucksack (including schoolbags and backpacks, etc.). As shown in the reference front view showing the names of each part and the reference front view showing the usage state, by attaching the strings inserted through the four string passages to the upper and lower ends of the two shoulder straps, this article is attached to the back of the rucksack. This article has a through-hole with a round hole and a groove in the thin part, as shown in the reference front view showing the names of each part. Each gap inside the exterior surrounded by the groove around the through-hole of this article houses a cooling medium such as a phase change member (PCM: Phase Change Material), and can cool the back of a person carrying the rucksack.

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