Patent ID: 8726706

Claim:
A locking device, in particular of a motor vehicle, comprising a key and a lock cylinder, having a cylinder core, which is mounted in a rotatable manner in a cylinder housing and has a key channel adapted for receiving a key and, having spring-loaded tumbler elements which are mounted such that, when the key is inserted into the key channel, they can be displaced radially to a cylinder axis of the lock cylinder, a plurality of outer surfaces provided on the key have control tracks which act on the tumbler elements when the key is introduced, the outer surfaces have two narrow sides and two broad sides, wherein each broad side is embodied with a first control track, the first narrow side has a second control track, and the second narrow side lying opposite the first narrow side is embodied free of any control tracks; and wherein the first control track has first guide surfaces and the second control track has second guide surfaces, wherein the first guide surface acts on at least one first tumbler element and the second guide surface acts on at least one second tumbler element, wherein a displacement of the first tumbler element takes place in a first radial direction to the cylinder axis, and a displacement of the second tumbler element takes place in a second radial direction, which is perpendicular to the first radial direction, to the cylinder axis; and wherein the first radial direction is parallel to the respective broad side and the second radial direction is parallel to the narrow side of the key.