Locking device consisting of key and locking cylinder

A locking device having a key and locking cylinder suitable for actuation of electrical microswitches on keyboards, wherein

• the locking cylinder comprises a locking cylinder housing having a bore, and a cylinder bore which is arranged for rotation in said bore;
• a plurality of stops disposed on said locking cylinder housing;
• a plurality of platelet-shaped tumblers disposed in said cylinder core, the cylinder core having a head plate, the key having a stepped-down key shaft with a radially projecting shoulder and being insertable via said head plate into the cylinder core, said key coming after a specific rotation to rest against said stops of said locking cylinder housing;
• and a free space is provided between said head plate of said cylinder core arranged on a front side of said locking cylinder and a head end of said locking cylinder housing, into which free space a key-shaft shoulder of the key can enter;
• said plurality of stops of said locking cylinder housing are arranged at different distances from an axis of rotation of said cylinder core, at least one of said stops protruding for limiting an angle of rotation of said cylinder core by a striking upon the key-shaft shoulder;
• said locking device further comprises a microswitch housing with grooves arranged along an interior surface of a wall of the microswitch housing facing said locking cylinder;
• said locking cylinder housing has radially projecting longitudinally ribs which enter in form-locked manner into said grooves in the wall of said microswitch housing;
• and
• said locking cylinder housing has window-shaped openings arranged axially aligned with said longitudinal ribs for passage of ends of said platelet-shaped tumblers.