Tubular lock directly actuatable by a key

A tubular lock comprising:

• a latch assembly comprising a latch bolt and two driving wheels operably connected to the latch bolt, the latch bolt being retracted when either one of the driving wheels is turned;
• an inner lock assembly adapted to be mounted to an inner side of a door, the inner lock assembly comprising an inner handle and a spindle connected to the inner handle to turn therewith, the spindle being engaged with one of the driving wheels to turn therewith such that said one of the driving wheels is turned to thereby retract the latch bolt when the inner handle is turned;
• an outer lock assembly adapted to be mounted to an outer side of the door, the outer lock assembly comprising an outer fixed handle which is unable to turn in both a locked state and an unlocked state, a lock, and an actuating member, the lock comprising a lock core having a tail-piece, the lock core being driven by a proper key to turn the actuating member;
• and
• a drive member, the drive member comprising an actuating tube being engaged with the other one of the driving wheels to turn therewith, the drive member being securely engaged with the actuating member to turn therewith such that the other driving wheel is only allowed to turn from an outer side thereof on condition that when the proper key is inserted into the lock core and turned.