Rotary actuator

A rotary actuator, comprising:

• an entirely cylindrical main body;
• an actuating handle mounted in a rotatable fashion in the cylindrical main body and fitted onto the cylindrical main body and having a display area;
• a rotatable crown;
• an inserted base arranged in the cylindrical main body, said inserted base having contours which engage in contours of the crown;
• a guide element separate from the actuating handle and configured to guide the inserted base and the crown;
• and
• a spring element arranged between the rotatable crown and the guide element to permit resetting of the actuating handle, said spring element partially housed in the rotatable crown and partially housed inside a linking member,
• wherein the rotatable crown is arranged between the inserted base and the actuating handle, wherein the guide element is a lightguide,
• wherein the rotatable crown and the guide element assume a position offset by 45° with respect to the inserted base upon actuation with latching of the actuating handle, so that the contours of the inserted base do not engage with the rotatable crown,
• wherein the inserted base and the rotatable crown are each cylindrical and are guided through an inner wall of the cylindrical main body, and the rotatable crown directly contacts an inner wall of the linking member and the inserted base directly contacts an inner wall of the cylindrical main body.