Key for barrel lock - has ball bearings laterally displaced by pins on insertion into lock to move locking pistons

摘要

The key for a barrel lock comprises a handle (7) extending from the key body (8) inserted into the rotor (3) contained inside the barrel (1). The external surface of the key body (8) contains at least one captive ball-bearing retained inside a recess (11) by a strip (10). On insertion into the lock, a correspondingly placed pin (16) on the rotor (3) acts on the ball-bearing through a hole in the strip. The ball-bearing is consequently displaced and projects from the other side of the recess allowing a piston (19) to be moved and the key to be rotated.