| 摘要 |
An operating device for controlling user functions in electronic user equipment in cooperation with a display screen, wherein the device has a control element which is stepwise rotatable about an axis and is provided with a plurality of pressure points in order on tilting of the control element to selectively actuate switches located on a base member of the device housing, and wherein the rotation of the control element is detectable by means of sliding contacts on the underside of the control element and contact fields on the base member. The control element is encircled by a stationary, ring-shaped portion provided with a plurality of recesses which in number correspond to the position of said pressure points. |
