Uhf tuner device

Abstract

A UHF Tuner device having a first rotating member rotating unitarily with a coarse tuning rotating shaft and adapted to be indexed and held in a position to which it has been thus rotated; a second rotating member rotated unitarily with a fine tuning rotating shaft; and a third rotating member rotated by the rotation of the second rotating member thereby to vary the capacitance of a variable capacitor of a tuner device proper, the second and third rotating member rotating unitarily with the first rotating member at the time of channel-selection coarse tuning when the coarse turning rotating shaft is rotated, and the third rotating member being rotated in accordance with the rotation of the second rotating member at the time of fine tuning when the fine tuning rotating shaft is rotated. The first rotating member has slots formed therein in radial directions thereof, while the second and third rotating members respectively have cam grooves formed with certain angular ranges with respect to their respective centers, the rotation of the second rotating member being transmitted to the third rotating member by engagement members inserted through the slots of the first rotating member and clamped between the cam grooves of the second and third rotating members.