Patent ID: 9630529
Date: 2017-04-25
CPC Classifications: B60N

Claim:
1. A seat reclining apparatus comprising: a base plate, an outer surface of which faces one of a seat cushion side frame and a seatback side frame; a ratchet plate, an outer surface of which faces the other of said seat cushion side frame and said seatback side frame, which faces said base plate to be rotatable relative to said base plate, and includes an internal gear; a rotational center shaft which is mounted at rotational center portions of said base plate and said ratchet plate to be rotatable about an axis of said rotational center shaft; a lock member being supported on an inner surface of said base plate, said inner surface facing said ratchet plate, said lock member including an outer toothed portion formed on an outer peripheral surface of said lock member and being movable between an engaged position and a disengaged position, said engaged position to engage said internal gear with said outer toothed portion, and said disengaged position to disengage said outer toothed portion from said internal gear toward an inner peripheral side; a rotational cam which is positioned between said base plate and said ratchet plate and rotates with said rotational center shaft between a locked position, to position said lock member in said engaged position, and an unlocked position, to position said lock member in said disengaged position; a lock spring disposed to face the outer surface of said base plate or disposed in a hole formed in said base plate to bias and rotate said rotational center shaft in a direction to rotate said rotational cam toward said locked position; and a spring cover being disposed to face said outer surface of said base plate and covering said lock spring, wherein said spring cover includes a protrusion being projected from said spring cover, and includes a spring housing portion, and said spring cover facing and being disposed adjacent to said lock spring in an axial direction of said rotational center shaft, wherein an inner surface of said one of said seat cushion side frame and said seatback side frame is made to contact an outer surface of the protrusion which is projected from said spring cover.