Surgical instrument

An end tool of a surgical instrument, the end tool comprising:

• a first jaw and a second jaw configured to rotate independently of each other;
• a J11 pulley coupled with the first jaw and configured to rotate around a first axis formed at an end tool hub;
• a J16 pulley formed at one side of the J11 pulley and configured to rotate around a second axis formed at one side of the first axis;
• a J12 pulley and a J14 pulley formed at one side of the J16 pulley, and configured to rotate around a third axis formed at a predetermined angle with the first axis, and formed at one side of the end tool hub;
• a J21 pulley coupled with the second jaw and configured to rotate around an axis that is substantially identical to or parallel to the first axis;
• a J26 pulley formed at one side of the J21 pulley and configured to rotate around an axis that is substantially identical to or parallel to the second axis;
• a J22 pulley and a J24 pulley formed at one side of the J26 pulley and configured to rotate around an axis that is substantially identical to or parallel to the third axis, axis;
• a J13 pulley and a J15 pulley formed at one side of the J12 pulley and the J14 pulley, and configured to rotate around an axis that is substantially parallel to the third axis;
• and
• a J23 pulley and a J25 pulley formed at one side of the J22 pulley and the J24 pulley, and configured to rotate around an axis that is substantially parallel to the third axis,
• wherein the end tool further comprises:
• a first jaw wire configured to at least partially contact the J12 pulley, the J11 pulley, the J16 pulley, the J14 pulley, the J13 pulley, and the J15 pulley;
• and
• a second jaw wire configured to at least partially contact the J22 pulley, the J21 pulley, the J26 pulley, the J24 pulley, the J23 pulley, and the J25 pulley,
• wherein a pair of strands of the first jaw wire wound around the J11 pulley, each of the pair of strands contacts a lower side of the J12 pulley and J14 pulley, respectively, and each of the pair of strands contacts an upper side of the J13 pulley and J15 pulley, respectively.