| 摘要 |
A programme selection switch assembly of a machine, especially of a household appliance that switches on one of possible programmes upon manual selection with the knob and simultaneously automatically also turns on an adequate luminous sign denoting the selected programme or the current selection or status of the programme independently of the operator's action, whereby the luminous indication of any selected programme is given by a luminous element, preferably a diode. The knob assembly of the invention is conceived in a way that a rotating knob (2) of the programme selection switch on the rear side of a panel (1) consists of a support (4) of a luminous element (5), preferably a diode, whereby the luminous element (5) is positioned on the support (4) at a distance from the rotating axis of the knob (2) equalling to the radius of the circumference, on which transparent windows (7) are arranged on the panel (1), said windows denoting the selected operation programme or rather the current status of this programme, whereby electric contacts (6) of the luminous element (5) are galvanically linked to two preferably elastic and electrically conductive sliding elements (8) that are in electric contact and slide along two concentric contact circumferences (9) when the knob (2) is rotated, said sliding elements being under voltage when the appliance is electrically switched on and positioned on the basic electronic board (10) positioned behind the control panel (1). <IMAGE> |
