Damper device

A damper device comprising:

• a first rotor rotated about a rotational axis;
• a second rotor rotated about the rotational axis, the second rotor disposed to be rotatable relative to the first rotor;
• and
• an elastic coupling part configured to elastically couple the first rotor and the second rotor in a rotational direction, the elastic coupling part including a first elastic member and a second elastic member, the first and second elastic members each initially disposed in a respective initial compressed state in a neutral condition without torsion caused by relative rotation between the first rotor and the second rotor, wherein
• the elastic coupling part is configured such that the first elastic member transitions from its initial compressed state to a free state and then is recompressed when the torsion of the first rotor with respect to the second rotor is caused from the neutral condition to a first side in the rotational direction,
• the elastic coupling part is configured such that the second elastic member transitions from its initial compressed state to a free state and then is recompressed when the torsion of the first rotor with respect to the second rotor is caused from the neutral condition to a second side in the rotational direction, and
• the elastic coupling part is configured such that each of the first and second elastic members is able to transition from a one-side contact state in which only a radially inner side of the elastic member is compressed to a both-side contact state in which both the radially inner side and a radially outer side of the elastic member are compressed with increasing torsion angle between the first and second rotors.