End piece for a switch/selector pull has an operating rod within an inner tube in an outer shrouding tube with a rod circumference shape to give local contact points with the inner tube to reduce noise emissions

摘要

An end piece for a pull switch, comprises an inner pull unit coupled to a transmitter or receiver via an operating rod (10), within a shrouded inner tube (12). The cross section of the inner tube is different to that of the operating rod, so that the mantle surface of the rod lies against the inner wall of the inner tube at least at two points (24), to give a gap (26) between the walls. An end piece for a pull switch, comprises an inner pull unit, coupled to a transmitter or receiver through an operating rod (10), which moves within an inner tube (12). The inner tube is in a shrouding tube (14). The cross section of the inner tube is unlike the shape of the outer circumference (16) of the operating rod, so that the mantle surface of the operating rod lies against the inner wall of the inner tube at least at two points (24), preferably three or more, to give a clear gap (26) in the sections between the walls.