Disc tumbler cylinder lock and key combination

A disc tumbler cylinder lock-key-combination, the disc tumbler cylinder-lock of which combination comprises an outer cylinder and to be rotated inside the outer cylinder, an inner cylinder having a disc pack, which comprises tumbler discs provided with a central opening and a peripheral cavity, and spacer discs, which spacer discs separate the tumbler discs from each other, and central openings form a uniform canal having a guide element, which comprises two rails,

• which inner cylinder further has rotation limiter disc means, which are in connection with the guide element, and a locking bar, which, when the lock is in a locked position, is located partially in the groove in the outer cylinder and partially in a gap in the inner cylinder, which tumbler discs are rotatable by a key of the combination into a position, in which the peripheral cavities are at the site of the gap of the inner cylinder forming a uniform groove, into which the locking bar is able to move by the rotation of the key, wherein the limiter disc means are composed of a frame piece and a limiter piece, which frame piece is an annular disc having an opening in the middle of the disc, which opening extends up to a border of the disc widening towards the border and to the wider portion of the opening, on a side of said border, is disposed a limiter piece, and on a bottom of which opening is additionally a recess for the first rail of the guide element, and the first side of the opening forming a sliding surface, along which the limiter piece is able to slide as the key is rotated from the locked position of the lock,
• which limiter piece comprises a first projection, a second projection and a third projection, the third projection being towards the bottom of the opening of the frame piece, the second projection being in an opposite direction as the third projection, and the first projection being transversely away from the third and second projections, between which third and first projections is a recess for the second rail of the guide element, a border surface of the second projection being wider than a width of the gap of the inner cylinder and each side edge of an end of the third projection being bevelled,
• on an inner surface of which inner cylinder is a recess at the site of the rotation limiter disc means for the second projection of the limiter piece, and which key has at least one bevel-edged cavity for the end of the third projection, a gradient of the bevelled edge corresponding to a gradient of the bevelled side edges of the third projection, the limiter piece and frame piece being rotatable in relation to the inner cylinder as the key is rotated.