Keyboard for presetting the tuning of a radio receiving apparatus

A keyboard for presetting tuning of a radio receiving apparatus, comprising a tuning setting slide manually operable for setting up the tuning for the reception of a plurality of transmitters, and a group of depressible key means, the slide being slidably movable in a direction substantially perpendicular to the direction of movement of the key means, and each one of said key means being associated with a tuning storing element for cooperating with said slide in such a manner that in a first condition of the key means said tuning storing element is conditioned to store the tuning preset by said slide and in a second condition of the key means said tuning storing element automatically sets up said slide according to the stored tuning, wherein each of said tuning setting elements comprises a wedge which is pivotally mounted on the associated key means, said slide being provided, in correspondence with each one of said wedges, with a pair of converging profiles adapted to cooperate directly with the associated wedge when the key means is depressed, the key means having releasable locking means for releasing said wedge when said key means is in said first condition, thus allowing said wedge to reach an angular position as dictated by the converging profiles of the slide when the key means is depressed, and for locking said wedge against pivoting when said key means is in said second condition, whereby said slide is displaced by a camming action of said wedge on said converging profiles when the key means is depressed.