Patent ID: 8702748
Filing Date: 2014-04-22
Classification: A61B

Abstract:
1. A laparoscopic surgical instrument including a shaft and a head having a distal end to which a variety of surgical instruments are attached, the laparoscopic surgical instrument comprising: a flexible joint installed between the shaft and the head; a longitudinal-driving unit including a longitudinal-driving wire connected with both longitudinal ends of the head and a longitudinal-driving roller turning the longitudinal-driving wire, wherein the longitudinal-driving unit turns the flexible joint in a longitudinal direction; a transverse-driving unit including a transverse-driving wire connected with both transverse ends of the head and a transverse-driving roller turning the transverse-driving wire, wherein the transverse-driving unit turns the flexible joint in a transverse direction; and forceps included or connected to the head, wherein the forceps include: a couple of forcep jaws separated to top and bottom sides and rotatably attached to the head at a pivot; a distal driving roller configured to rotate the forceps; and a forceps-driving unit configured to actuate the distal driving roller to turn the forceps, wherein each of the forcep jaws has a linearly elongated guide slit formed on an inside thereof that is elongated along an inclination away from the pivot, and wherein the distal driving roller is rotatably coupled with a body connected with the head and has driving pins eccentrically protruded on both sides, each of the driving pins connected with the guide slit of each of the forcep jaws, wherein the shaft has a small diameter, and wherein the driving pins move in different directions in the guide slit according to a direction of rotation of the driving roller, and both forcep jaws are closed up until opposing sides come into contact with each other or are opened by moving in both directions.