Mechanical lock with discriminated opening via control for a plurality of keys that can be authorized and system for receiving parcels that includes same

A changeable lock for a parcel delivery and reception mechanical system, including a housing (27), a lid (7), a deadbolt (22) that includes a set of plates (17), a set of interlocks (18) located in front of the set of plates swinging around a stem (33), which by means of an authorized key (26) are ordered and coupled, characterized in that the lock is capable of being operated in a discriminated manner by a plurality of keys with different mechanical codes (39);

• a selection device (1) (6) (8.1) (8.2) (8.3) (8.4) (8.5) (8.6), to discriminate the authorized code, goes through the deadbolt (22) modifying the position of the plates (17) while waiting for the matching and coupling in the slits of the plates (17) of each of the interlocks (18) that lift the teeth of the authorized key (26);
• a rod (4) to manually move the deadbolt (22) from the outside of the lock to its closure;
• a mechanism to restrict the turning direction (15) of the selection device (1) (6) (8.1) (8.2) (8.3) (8.4) (8.5) (8.6);
• a mechanism to restrict the other turning direction (19) on the drive shaft (6) to lock the selection device which is operated at the time when the deadbolt path (22) is in the closed position;
• and a signaling mechanism (5) (2) (3) that depends on the point of the deadbolt displacement path (22), assembled in the selection device and in the lid (7) to make visible from the outside which mechanical code is authorized to open the lock.