A surgical stapling apparatus (10), comprising: a cartridge assembly (20) configured to accommodate a plurality of sets of surgical fasteners (110)； a trigger assembly (300) coupled to the cartridge assembly and configured for a repeated drive, wherein, with each drive, the trigger assembly is configured to move from a first position to a second position to fully eject one of the sets of surgical fasteners from the cartridge assembly, the firing assembly is further configured to move from the second position back to the first position to reset the firing assembly for further operation； and a locking assembly (320) coupled to the firing assembly, the locking assembly is configured to allow subsequent actuation of the firing assembly to fully eject another of the sets of surgical fasteners from the cartridge assembly with the translation of the assembly of shot from the first position to the second position and back to the first position, where the locking assembly includes a cam track (335) and a cam member (322) coupled to the cam track and the firing assembly , the cam track defines a plurality of drive paths (412, 414, 416) interconnected by a plurality of drive return paths (442, 444), wherein with the movement of the trip assembly from the first position to the second position, the cam member is configured to move along one of the drive paths, and where, with the movement of the trigger assembly from the second position back to the first position, the cam member is configured to move along one of the complete drive return paths, and where the lock assembly is further configured to inhibit the subsequent drive of the trip assembly with the translation of the firing assembly from the first position to a third position (413b, 415b) arranged between the first and second positions and again towards the first position without reaching the second position.Un aparato de grapado quirúrgico (10), que comprende: un conjunto de cartucho (20) configurado para alojar una plur
