Locking/unlocking device for a one-piece cover of a thrust reverser of a turbojet engine nacelle

The present invention relates to an assembly for a turbojet engine, comprising a pylon and a nacelle, said nacelle being supported by said pylon and surrounding the turbojet engine in such a way as to define a circulation duct (51) for a secondary air flow and comprising a thrust reversing device comprising a one-piece cover sliding between an operating position and a maintenance position, comprising a device (30) for locking/unlocking said sliding movement, said device comprising retention means for the retention of said cover and being mobile between an active position and an inhibited position. The assembly according to the invention is remarkable in that said device comprises a rocker switch (36) for switching the retention means comprising at least one inhibiting lever (37) and at least one activation lever (39) for said retention means, said levers being mounted on a switching shaft (35) of said device and accessible from the duct (51).