Patent attributes
A vehicle seat reclining apparatus is provided in which the strength of a connecting portion positioned directly or nearly directly below a receiving wall face of a guide portion of a fixed-side housing is higher than in a conventional reclining apparatus. A protruding guide portion is provided in a fixed-side housing used to configure a reclining apparatus. A receiving wall face that makes contact with a locking gear used to configure the reclining apparatus and which thus guides movement of the locking gear, and a top face that is continuous with that receiving wall face, are formed in the guide portion. A tapered chamfer portion is present at an edge of the receiving wall face where the receiving wall face and the top face of the guide portion intersect. A thick portion with a tapered face that corresponds to the chamfer portion is provided directly or nearly directly below a base end portion of the receiving wall face. A connecting portion that connects the guide portion with other parts of the fixed-side housing is thickened at this thick portion.
