| 摘要 |
A vehicle seat reclining device includes first and second brackets, which are rotational relative to each other, two guide portions provided on the first bracket and forming a guide groove, a pawl, and a protruding portion. The pawl has outer teeth, which can engage with and disengage from inner teeth of the second bracket, and is guided by the guide groove to move radially. The protruding portion protrudes circumferentially at least at the tip end portion of the guide portion. A fulcrum of inclination of the pawl with respect to the guide part may occur at the time when the outer teeth and the inner teeth are disengaged from each other. The fulcrum located at a position closer to the inner teeth than an intersection point between the guide portion and a normal to a surface where the outer teeth and the inner teeth are engaged with each other. |
