| 摘要 |
<p>A rotary control knob with a first protruding work position and a second retracted rest position has no need that the support panel on which it is mounted, especially a dish-washing machine door, has a thickness such as required to allow housing a two-steps operated restraint device. The control knob is integral with an axially slidable control shaft, which does not rotate with respect to the rotating portion of the machine component to be controlled. The same shaft is connected at a point situated backward of the control knob, to the two-steps operated device which in a first embodiment is housed in a hollow part of the rotating portion of the machine component to be controlled and, according to a second embodiment, is linked to the rear end of the control shaft passing through the said component.</p> |
