End switch for roller shutter drive

摘要

The switch involves a roller shutter drive which has an electric servo motor controlled by switches (2) operated by plungers (3) in the two end settings of the roller drive. A set of gear wheels (5,6,7) with different tooth ratios have holes through their flanges aligned at preset positions of the servo drive. This allows the plungers to move. The control gear wheels either have holes through their flanges or have notches on the outer profiles. In either case the spring loaded plungers only move in the end settings of the roller drive.