Fixing equipment for first-aid knapsack

The fixing equipment comprises a backpack shoulder strap and a sleeve shell, a metal ring is embedded in the right side of the backpack shoulder strap in a penetrating mode, positioning assemblies are installed at the top and the bottom of the surface of the backpack shoulder strap in a sleeved mode, each positioning assembly comprises an installation base, and a second rotating rod is installed on the rear side of an inner cavity of the sleeve shell. And a first rotating rod is mounted on the front side of the inner cavity of the sleeve shell. Through cooperative use of the bridle, the first clamping plate, the mounting base, the second clamping plate, the connecting spring, the pull rod, the sleeve shell, the metal ring, the anti-skid wheel, the first rotating rod, the gear, the sleeve roller, the limiting rod, the supporting spring, the auxiliary sleeve and the second rotating rod, the problems that an existing first-aid knapsack is generally in a double-shoulder carrying mode, the two hands are liberated,