Abstract: A lock is provided, including: a housing; a latch member, movably mounted to the housing and including a first blocking portion; a blocking member, movably mounted to the housing and including a second blocking portion; a locking member, operably mounted to the housing; wherein when the locking member is in a locking state and the latch member is in a first position, the locking member and the blocking member are free of blocking from each other so that the first blocking portion and the second blocking portion are blocked with each other, and the latch member is unmovable toward a second position; when the locking member is in a unlocked state, the second blocking portion and the first blocking portion are unblocked with each other and the latch member is movable to the second position so that the latch member is retractable from a locked object.

Abstract: The present invention relates to a lock having a key provided with variable key information elements which are adapted to be scanned during rotation of the key around an axis of the lock. The key preferably includes ten (10) cam plates fixedly joined together in pairs for rotation and mounted in pairs on coaxial hollow shafts. Each shaft is driven by a handwheel in an angularly variable manner. Each cam plate has five (5) different radial steps, so that each pair of cam plates correspondingly has twenty-five (25) different possible combinations of angular positions, each of which can be identified by a letter of the alphabet on the respective handwheel. The key combination is legible through a display window. The lock and its key which are of a relatively simple design, allow the key combination to be easily set and readily recalled.