Switch with box-like case - has cover wall in case with hole for operating element sealed by plastics component

摘要

The case has a wall covering contacts inside it, and an operating element on it, operating the movable contacts. A switching projection on the operating element passes through an aperture in the cover wall and projects inside the case. The sealing element (30) is made of a hard but elastic plastic, with good antifriction properties and is inserted between the operating element (15) and the cover wall (27). The switching projection (25) passes through the sealing element (30) which is in a springy contact with the operating element and the cover wall (27), so that its aperture is covered.