Patent ID: 7602268
Filing Date: 2009-10-13
Classification: G05G,G06F

Abstract:
1. An operation input device comprising: a base, a printed circuit board which has a plurality of pushbutton switches and magnetic field detecting elements mounted on its upside and which is stacked on and united with said base, an operation plate which is arranged on said printed circuit board and whose outer peripheral edge parts are supported by said base, a disc type operation dial in which an annular magnet with N-poles and S-poles arranged alternately is assembled on an underside of said operation dial and which is turnably assembled on an upside of said operation plate, a slide sheet which is arranged between said operation plate and said disc type operation dial and whose outer peripheral edge parts are supported by said base, and a member operable to vertically urge said operation plate; wherein each outer peripheral edge part of said operation plate and each outer peripheral edge part of said slide sheet are engaged together with an corresponding outer peripheral edge part of said base and supported by said base so as to be vertically movable in a preset range and so as not to be displaced in a rotational direction; and wherein said disc type operation dial is turned, thereby to sense changes of magnetic fluxes of the annular magnet by the magnetic field detecting elements and to detect a turning direction, while said disc type operation dial is depressed, thereby to operate any of the pushbutton switches through said operation plate.