Stylus for reproducing capacitive videodisc

Claim 1

A reproducing stylus for tracing a track of a recording medium, in which track an information signal is recorded without grooves as variations of geometrical shape, and for reproducing as variations in capacitance the information signal thus recorded, said reproducing stylus comprising: a reproducing stylus main structure having a tip portion with a flat sliding contact face for slidingly contacting a plurality of tracks of the recording medium at one time; and an electrode on the reproducing stylus main structure to trace one track and reproduce the information signal as the variations in capacitance in accordance with the variations in geometrical shape, shape reproducing stylus main structure having an electrode surface on which said electrode is disposed, said electrode surface having side edges and an end edge, said stylus reproducing structure having a pair of side surfaces diverging from the side edges of said electrode surface at least in the vicinity of the tip portion of the reproducing stylus main structure, said side surfaces having end edges, said flat sliding contact face of the reproducing stylus main structure having a first edge line determined by said end edge of the electrode surface and having a dimension smaller than the width of the track, and a pair of second edge lines determined by said end edges of said pair of side surfaces, said second end lines diverging from both ends of said first edge line, the maximum spacing between the second edge lines being greater than the width of the track.