Seat recliner

A seat recliner comprising:

• a first flange having first inner teeth formed along an inner surface thereof;
• a gear plate inserted in the first flange, having first outer teeth formed along an outer surface thereof and engaged with the first inner teeth, and having second outer teeth formed at a position offset in a height direction from the first outer teeth;
• a second flange combined with the first flange, covering an inside of the first flange, and having second inner teeth formed along an inner surface thereof and engaged with the second outer teeth;
• and
• an eccentric cam assembly disposed at a center of the gear plate, making the gear plate be eccentric with respect to the first flange and the second flange by pressing the gear plate to a side,
• wherein the first outer teeth and the second outer teeth are respectively engaged with the first inner teeth and the second inner teeth outside the eccentric cam assembly,
• wherein the first outer teeth and the first inner teeth or the second outer teeth and the second inner teeth are engaged with each other at an angle, thereby a gap between the gear plate and the first flange or between the gear plate and the second flange is removed.