Patent ID: 7320236

Claim:
Locking and unlocking device with a key for a cover on a frame, comprising: a lock that is interdependent with the cover and the lock has an access opening for the key, the lock comprising; an arm having a bushing on an end of the arm that makes it possible to manipulate the lock when the key is introduced into the opening of the cover from a locking position, in which a slide bolt of the lock is held captive by a catch of the frame, to an unlocking position for which the slide bolt is released from the catch and the key is held captive in the opening of the cover, a rotor mounted for rotation in the cover, the rotor being accessible through the opening and coupled with the slide bolt, and the rotor being disposed perpendicular with the slide bolt in such a way as to allow the pivoting of the slide bolt around a longitudinal axis of the rotor due to the action of the key, between the locking and unlocking positions when the rotor is captive in and released from the catch, wherein the rotor of the lock comprises a generally cylindrical barrel mounted for rotation in the cover and being interdependent in rotation with the slide bolt and a cylindrical axle mounted loosely in the barrel, the cylindrical axle comprising: a cylindrical head in contact on the barrel and lodged in a cavity of the cover that is accessible from the outside through the opening of the cover and wherein means are provided for elastically and axially holding, in the cover, the barrel and the cylindrical axle, wherein the cylindrical head engages axially in the bushing of the key at the time of introduction of the cylindrical head into the cavity of the cover.