Patent ID: 7178371

Claim:
A disc tumbler lock comprising: a lock case, a first gripping structure provided stationarily in the lock case, a bolt that is located at least partially within the lock case and is displaceable relative to the lock case by a key of the lock in an opening direction from a first position in which a head of the bolt protrudes from the lock case to a second position in which the head of the bolt is at least partially retracted relative to the first position of the bolt, a plurality of locking discs each formed with a locking channel, the locking discs being displaceable by the key of the lock against a spring force from a locked position to an open position to open the lock, a locking pin dependent on movement of the bolt and cooperating with the locking channels of the locking discs, and stationary guiding members for guiding displacement of the locking discs, and wherein at least one of the locking discs is provided with a second gripping structure and is turnable about a first of said stationary guiding members between a position in which said one locking disc engages a second of said stationary guiding members and the second stationary guiding member prevents movement of said one locking disc in a direction opposite said opening direction and guides displacement of said one locking disc from the locked position to the open position, and a position in which the second gripping structure cooperates with the first gripping structure to prevent displacement of said one locking disc towards the open position.