Hand-operated control wheel for side wall of movable archive cupboard, has blocking unit with mushroom-type knob having seat that includes tumbler key for display of positions corresponding to blocking and releasing conditions of handwheel
摘要
<p>The wheel has a blocking unit controlled from outside by a user to intervene in a structure and to prevent rotation of the wheel. The unit has a mushroom-type knob (2) that axially movable in the handwheel between a releasing position and a inward moved blocking position. The knob has a seat that includes a tumbler key (7) for display of two positions that corresponds to blocking and releasing conditions of the wheel.</p>
