| 摘要 |
A seat reclining device is provided with a first bracket, a second bracket, a cam, and a plurality of poles that move in the radial direction of the first bracket in accordance with rotation of the cam and engage with the second bracket. At least one of the plurality of poles comprises a first block that is arranged radially outward and a second block that is integrally formed with the first block and that is arranged radially inward at a position that is shifted with respect to the first block in the direction of the axis of rotation of the cam. A cam surface that is in contact with the cam is provided to the radially inward end surface of the first block, and a limiting surface that is brought into contact with an inner circumferential section by radially outward movement of the pole is provided to the radially outward end surface of the second block. The cam surface and the limiting surface have the same surface structure. |
