| 主权项 |
1. A recliner that couples a seat back with a base on a floor, such that a backrest angle of the seat back can be adjusted, comprising:
a ratchet and a guide which are assembled together so as to be rotatable relative to each other; and a pawl supported by the guide in a circumferential direction, the pawl being adapted to mesh with the ratchet when moved to be pushed radially outwards, so as to inhibit rotational movement of the ratchet relative to the guide, wherein the pawl is sandwiched between and supported by guide walls formed in the guide, the guide walls being located at circumferentially opposite sides of the pawl, each of the guide walls has a weak portion formed at a location spaced in the circumferential direction apart from a contact face of the guide wall which is in contact with the pawl, the weak portion being adapted to undergo local stress concentration and plastic deformation due to pressing force received from the pawl when a large load that causes the pawl to undergo forced deformation in the circumferential direction is applied. |
