Key and disc tumbler cylinder lock

A disc tumbler cylinder lock and key combination, the lock comprising

• a cylinder body and within it an inner cylinder, the inner cylinder containing a stack of tumblers that comprises tumblers to be turned relative to the inner cylinder with a key, at least one of the tumblers being a 0-tumbler, said tumblers each being formed with a key channel and with an edge groove at the outer edge of the tumbler, and said cylinder lock also comprising a detent pin for locking the lock, said detent pin being able to be arranged into the edge grooves of the tumblers by turning the tumblers with the key to the position of the detent pin for opening the lock,
• the key comprising a shank having an outer surface formed by the key blank and at least one combination area in the direction of the shank, in which area a series of combination surfaces is establishable, wherein the shank also comprises at least one groove transverse to the shank direction, said groove comprising a bottom section and side sections transverse to the bottom section between the bottom section and the outer surface of the shank, and the bottom section of the groove being a main driving surface through which force turning the key is transferable to the inner cylinder of the disc tumbler cylinder lock,
• the stack of tumblers also comprises a transmission disc defining a key channel, the edge of which comprises a mating surface for the main driving surface of the key, and an edge groove at the outer edge of the transmission disc, the transmission disc comprising a transmission element disposed on the transmission disc, the edge groove and the transmission element being disposed at different positions on the transmission disc, and
• the inner cylinder defines a movement area for the transmission element and mating surfaces at the ends of the movement area to transmit three turning the transmission disc to the inner cylinder, the transmission disc being turnable by the key relative to the inner cylinder to a position for opening the lock in which the edge groove of said transmission disc is aligned with the edge grooves of the tumblers at the position of the detent pin so that the detent pin is able to settle into the aligned edge grooves, and the transmission element engages a mating surface of the inner cylinder when turning the key for opening lock.