PROBLEM TO BE SOLVED: To enable information displayed on an outer peripheral surface of a member to be viewed from an axial direction of the member, and to change over a selection element while viewing a device from the axial direction.SOLUTION: A rotation changeover device comprises: a cylindrical first member which has predetermined information displayed on its outer peripheral surface； a second member which can rotate relatively to the first member； a plurality of selection elements which have selection objects changed over according to relative positions of the first member and second member； a mirror surface part which is arranged at a periphery of the outer peripheral surface of the first member and formed of planes crossing the axial direction of the first member, and specularly reflects information displayed on the outer peripheral surface of the first member to enable the information to be viewed from the axial direction of the first member； and an indication part which indicates a selection element to be selected.SELECTED DRAWING: Figure 20【課題】部材の外周面に表示された情報を部材の軸方向から視認可能であり、装置を軸方向から見ながら選択要素を切替可能とする。【解決手段】回転切替装置は、外周面に所定の情報が表示された筒状の第１の部材と、第１の部材に対して相対回転可能な第２の部材と、第１の部材及び第２の部材の相対位置によって選択対象が切り替えられる複数の選択要素と、第１の部材の外周面の周囲に配置され、第１の部材の軸方向に対して交差する面により形成され、第１の部材の外周面に表示された情報を鏡面反射させて第１の部材の軸方向から情報を視認可能にする鏡面部と、選択される選択要素を指示する指示部と、を備える。【選択図】図２０
