COUPLING STRUCTURE AND ZERO POINT CALIBRATION METHOD OF SURGICAL INSTRUMENT

摘要

PURPOSE: A coupling structure of a surgical instrument and a zero point calibrating method are provided to calibrate a zero point by forming a driving force generating unit with a friction clutch type. CONSTITUTION: An operation unit(10) is inserted into a surgical part. A driving force transmitting unit operates the operation unit by transmitting a driving force to the operation unit. A first coupler includes a pulley(14) which applies tension to the driving force transmitting unit. A second coupler is selectively connected to the first coupler and operates the first coupler. The second coupler includes a friction clutch(20a). The friction clutch is selectively contacted with the outer side of the pulley and rotates the pulley.