| 摘要 |
A seat reclining apparatus includes a support frame (13) tiltable about a support axis (X) relative to a first frame (1), an angle adjustment unit (C) causing a second frame (2) to tiltably move forward or rearward relative to the support frame by a driving force of an actuator (M), the second frame (2) being displaced in a direction to approach and separate from the support axis (X), a lock mechanism (L) selectively operated to an unlocked state and a locked state, and a front stopper (31) provided at the first frame (1) to specify a forward tilt limit of the seat back (B) by making contact with a forward tilt contact portion (2S) provided at the second frame (2) in a state where the lock mechanism (L) is in the unlocked state, the front stopper (31) including a linearly-shaped contact surface (31 S) that makes contact with the forward tilt contact portion (2S) and that matches or approximates a virtual straight line (V) passing through the support axis (X).
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