Diaphragm Assembly

A diaphragm assembly includes a diaphragm defining a volume space; a diaphragm body extending from the diaphragm; a transition region from the diaphragm to the diaphragm body located on an outer side of the diaphragm and the diaphragm body facing away from the volume space; and a convex abutment contour arranged adjacent to the transition region. Related seat and pump assemblies are also disclosed.