clamping unit for a protective helmet support strip, particularly for forestry engineers

摘要

A tightening unit is described for a supporting band which is attached to the lower edge of interior fittings of a protective helmet for fastening the helmet on the head of a user. The supporting band comprises a head band which continues in a neck band which has two free ends connected to each other by a basic body of the tightening unit. The tightening unit has a neck shell and a basic body which are connected to each other in an articulated manner by a transmission lever. The basic body can be pivoted relative to the neck shell by a tightening lever linked thereto which is supported on the transmission lever by a cam.