A storage box includes an upper cover, a lower cover, a
drying support member and a shaft sleeve mechanism. The shaft sleeve mechanism includes a key shaft, an upper cover shaft sleeve, a lower cover shaft sleeve and an
drying support member shaft sleeve matched with the key shaft, and the key shaft includes a lower cover shaft sleeve
adaptation section, an upper cover shaft sleeve
adaptation section and a
drying support member shaft sleeve
adaptation section. The upper cover is rotatably connected to the upper cover shaft sleeve adaptation section of the key shaft, the lower cover is rotatably connected to the lower cover shaft sleeve adaptation section of the key shaft, the drying support member is connected to the drying support member shaft sleeve adaptation section of the key shaft, and the drying support member and the key shaft rotate synchronously.