PROBLEM TO BE SOLVED: To provide a medical actuator which can alter, with high accuracy, the attitude of a tool provided at the tip of an elongated pipe part and can suppress friction of mutual contact places without having an adverse effect on a living body.SOLUTION: The medical actuator includes a spindle guide part 3 in an elongated shape, a tip member 2 attached to the tip of the spindle guide part so that the attitude thereof can be altered, and the tool 1 provided rotatably at the tip member 2. The tip member 2 rotatably supports a spindle 13 holding the tool 1. The spindle guide part 3 internally has a rotary shaft 22 transmitting rotation to the spindle 13 and a guide hole 30a penetrating through both ends. An attitude operation member 31 inserted inside the guide hole 30a so that it is movable forward and backward is made to move forward and backward so as to alter the attitude of the tip member 2. A DLC film is formed on at least one of the surfaces of the mutual contact places of a plurality of components moving relatively mutually.COPYRIGHT: (C)2012,JPO&INPIT【課題】 細長いパイプ部の先端に設けられた工具の姿勢を遠隔操作で精度良く変更することができ、生体に悪影響を及ぼすことなく相互接触箇所の摩擦を抑えることができる医療用アクチュエータを提供する。【解決手段】 細長形状のスピンドルガイド部3と、その先端に姿勢変更自在に取付けられた先端部材2と、先端部材2に回転自在に設けた工具1とを備える。先端部材2は、工具1を保持するスピンドル13を回転自在に支持する。スピンドルガイド部3は、スピンドル13に回転を伝達する回転軸22と、両端に貫通したガイド孔30aとを内部に有する。ガイド孔30a内に進退自在に挿通した姿勢操作部材31を進退動作させて、先端部材2を姿勢変更させる。少なくとも一つの、互いに相対移動する複数の部品の相互接触箇所の表面にDLC膜を形成する。【選択図】 図3
