Patent ID: 6809661
Filing Date: 2004-10-26
Classification: H01H

Abstract:
A keypad device for telephones, mobile phones, remote control units, text and character transmitters, calculators, electronic planners or the like, wherein a control element, when actuated manually by an operator, is adapted to be able to carry out at least two function commands, and wherein various positions of the control element are identified by means of optical detectors, characterized bya code bar (61; 72; 145) movable through at least one of slide motion and rotation; a detector unit (60) having a through, longitudinal channel (62) for moving the slide member (61; 72) stepwise through the detector unit (60); at least a first and a second set of light emitter/light receiver pairs (67, 67â€²; 68, 68â€²; 69, 69â€²; 70, 70â€²; 71, 71â€²) arranged in the detector unit for light emission and detection of received light transverse to the channel; transverse holes (75, 75â€², 75â€³) arranged in the longitudinal direction of the code bar and spaced apart at regular intervals; a control means (82) interactive with the code bar, said control means on actuation thereof to effect registration of which of the transverse holes light passes through or light is blocked from passing through, as detected by aid of said at least two sets of light emitter/light receiver pairs.