Functional unit attachment method, involves attaching functional unit to flat material, and anchoring functional unit to marginal region surrounding attachment opening without reducing diameter of opening

摘要

The method involves attaching a functional unit (2) to a flat material by inserting a riveting collar (7.1) into an attachment opening (9) such that a base (11) is accommodated in a region of the base. The region surrounds the opening between the collar and a bearing surface of the functional unit. The functional unit is anchored to a marginal region surrounding the opening without reducing the diameter of the opening. An independent claim is also included for a connector between a flat material and a functional unit.