Miếng chặn đầu giường

I copied FunTech1371 description:

[I use] concentric sparse infill pattern, which should help out a bit with any cracks forming between the layers. PLA is plenty stiff with the geometry I made here, just push your bed frame up to the wall to pre-load the spring a bit

Make sure you print on its "side" rather than on one of the flat faces for the same reason to avoid cracking.