Electrical mechanism set for electrical assembly, includes elastic lugs, provided in cover plate, each fitted into corresponding opening in box-like frame and having rack teeth engaged with teeth in edge of each opening

摘要

An electrical mechanism set has a cover plate (10) mounted on a central opening on a box-like metal frame. The cover plate has elastic lugs (15) each including rack teeth (16). The lugs are fitted into corresponding openings in the frame, such that the teeth engage with teeth in the edge of each opening to establish a snap retaining assembly. Each tooth has inclined planes on both sides to facilitate slidable insertion and pull-out of each lug relative to the opening.