PROBLEM TO BE SOLVED: To provide an operating mechanism for medical use, which employs a soft elastic body to control torque or force wherein the elastic body is hard to get broken when large load is applied to a load side.SOLUTION: The operating mechanism for medical use includes: a first shaft 61 fixed to a load side member a driving source for generating auxiliary driving force for assisting operation of the first shaft a second shaft 71 operated by the auxiliary driving force the elastic body 66 having at least part of the body elastically deformable and coupling the first shaft with the second shaft so as to transmit the auxiliary driving force a first detection part for detecting an operating quantity of at least one of the first and second shafts a control part for controlling the driving source based on the operating quantity detected by the first detection part and a protrusion 76 for preventing an elastically deforming quantity of the elastic body from reaching a predetermined quantity or larger.COPYRIGHT: (C)2013,JPO&INPIT【課題】柔軟な弾性体を用いてトルクまたは力を制御しつつ、負荷側に大きな負荷がかかったときでも弾性体が破損しにくい医療用動作機構を提供する。【解決手段】本発明の医療用動作機構は、負荷側部材に固定された第一軸61と、第一軸の動作を補助する補助駆動力を発生させる駆動源と、補助駆動力により動作される第二軸71と、少なくとも一部が弾性変形可能であり、第一軸と第二軸とを補助駆動力を伝達可能に連結する弾性体66と、第一軸および第二軸の少なくとも一方の動作量を検出する第一検出部と、第一検出部の検出した動作量に基づいて、駆動源を制御する制御部と、弾性体の弾性変形量が所定量以上になることを規制する突起76とを備えることを特徴とする。【選択図】図3
