US Patent 11751670 Child carrier, bag, backpack, and alterable frame

Child carriers, backpacks, bags, and alterable frames assemblies that resist buckling or breaking when an excessive force is applied. Frame members may move until engagement member engage when expanding the frame assembly. A fabric body may allow for movement of frame members, limit such movement, and support & strengthen the frame members within sleeves. The frame members include U-shaped and inverted U-shaped frame members engaging at engagement member when the frame is uncollapsed.