Rotary device

A rotary device comprising:

• a first rotor disposed to be rotatable;
• a second rotor disposed to be rotated with the first rotor and be rotatable relative to the first rotor;
• a first stopper mechanism configured to restrict relative rotation between the first rotor and the second rotor, the first stopper mechanism including a first protruding member and a first contact surface, the first protruding member including an outer peripheral part made of an elastic material, the first contact surface disposed at an interval from the first protruding member in a circumferential direction, the first protruding member making contact with the first contact surface when a torsion angle between the first rotor and the second rotor reaches a first angle;
• and
• a second stopper mechanism configured to restrict the relative rotation between the first rotor and the second rotor, the second stopper mechanism including a second protruding member and a second contact surface, the second protruding member including an outer peripheral part made of a material having a higher stiffness than the outer peripheral part of the first protruding member, the second contact surface disposed at an interval from the second protruding member in the circumferential direction, the second protruding member making contact with the second contact surface when the torsion angle reaches a second angle greater than the first angle.