Reclining device for vehicle seat

A reclining device for a vehicle seat, the reclining device comprising:

• a rotary bracket having a center portion thereof rotatably connected to a first frame and having a first locking section and a second locking section connected to the first locking section;
• and
• a cam configured to rotate about a center portion thereof which is connected to the first frame and having a locking portion disposed at one end thereof and disposed in the first locking section or the second locking section to be locked,
• wherein a second pressure angle at which the locking portion is locked in the second locking section is smaller than a first pressure angle at which the locking portion is locked in the first locking section, and
• wherein the rotary bracket further comprises:
• a first support protrusion disposed on one surface of the rotary bracket, directed toward the first frame, defined at an interval from the center portion of the rotary bracket, and configured to be inserted into a first long hole of the first frame;
• and
• a second support protrusion disposed on the one surface of the rotary bracket, directed toward the first frame, defined between the center portion of the rotary bracket and the first support protrusion, and configured to be inserted into a second long hole of the first frame.