Retaining unit for fastening installation device`s cover frame, has retaining springs with metal spring, where metal spring includes base shanks embedded in base plate, and side shanks covered by plastic except metallic sliding edges

摘要

The retaining unit (1) has a central recess (27) with a square base plate (2) made of plastic. Retaining springs (6, 7) fastened to the base plate include side shanks that engage in corresponding openings (22) in a support ring (21) of an installation device. The retaining springs include a u-shaped metal spring in their core, where the metal spring includes base shanks that are embedded in the base plate, and two side shanks that are covered by plastic except metallic sliding edges.