Damper device

A damper device, comprising:

• a first rotor including a plurality of first window portions and a plurality of second window portions, the plurality of first window portions disposed radially outside the plurality of second window portions;
• a second rotor disposed to be rotatable relative to the first rotor, the second rotor including a plurality of first window holes at positions corresponding to positions of the plurality of first window portions and a plurality of second window holes at positions corresponding to positions of the second window portions, the plurality of first window holes disposed radially outside the plurality of second window holes;
• a plurality of elastic members, some of which are each accommodated in one of the first window portions and a corresponding one of the first window holes and some of which are each accommodated in one of the second window portions and a corresponding one of the second window holes, the plurality of elastic members configured to elastically couple the first rotor and the second rotor in a rotational direction;
• and
• a stopper mechanism configured to restrict an angle of relative rotation between the first rotor and the second rotor to a predetermined angular range, wherein
• the stopper mechanism includes
• a first stopper hole provided on a first circumferential side of each of the plurality of first window holes of the second rotor so as to circumferentially extend therefrom, each of the first stopper holes communicating with the first window hole from which it extends at a first end thereof that is closest to the first window hole from which it extends, and each of the first stopper holes extending at a second end thereof that is located farthest from the first window hole from which it extends to a position radially outside one of the plurality of second window holes,
• a second stopper hole provided on a second circumferential side of each of the plurality of first window holes of the second rotor so as to circumferentially extend therefrom, and
• a plurality of stop members fixed to the first rotor, with one of the plurality of stop members axially penetrating each of the first and second stopper holes and being circumferentially movable therein.