Vehicle seat reclining device

A vehicle seat reclining device comprising:

• a first bracket;
• a second bracket that rotates in positive and negative directions relative to the first bracket;
• a cam that rotates or moves relative to the first bracket;
• and
• a plurality of pawls that move in a radial direction of the first bracket in cooperation with rotation or movement of the cam to engage the second bracket, wherein
• each of the pawls is biased toward a radially outer side and moved in the radial direction in cooperation with the rotation or the movement of the cam,
• a first pawl and a second pawl of the pawls each include a limitation portion that limits movement in the radial direction,
• the second bracket includes
• an outer circumferential wall including inner teeth that mesh with outer teeth of the pawls, and
• a first pawl restriction portion and a second pawl restriction portion respectively arranged in correspondence with the first pawl and the second pawl to engage the corresponding limitation portions and restrict movement of the first pawl and the second pawl in the radial direction,
• the second pawl restriction portion is located toward the negative direction from the first pawl restriction portion,
• negative direction ends of the first pawl restriction portion and the second pawl restriction portion are arranged to contact positive direction corners of the limitation portions of the first pawl and the second pawl when a rotation angle of the second bracket relative to the first bracket is a specified angle, and
• the first pawl restriction portion extends in the positive direction and is longer than the second pawl restriction portion.