Kabushiki Kaisha Imasen Denki Seisakusho

Yoshitaka Ishihara

Kazuyoshi Hara

Takuto Esaki

The object of the invention is to provide a reclining device which improves engagement between a lock gear and a gear plate for reliable locking without requiring high dimensional accuracy. Four lock gears comprising a pair of first lock gears, and a pair of second lock gearsin which a gap between the second lock gearand guide protrusionsis larger than a gap between the first lock gearand guide protrusionsare adopted. Due to elastic function of a biasing member bodyof an biasing member, both the second lock gearsare biased radially and inwardly and toward the guide protrusionof the base plate

Reclining device

A reclining device capable of eliminating mechanical play in a front-rear direction of a seat back is provided. Particularly, a reclining device reliably capable of locking and releasing is provided at an inexpensive cost. Movable guides are slidably disposed respectively between lock gears and a fixed guide. Each of the movable guides is formed in a shape that the width thereof gradually decreases from the outer end toward the inner end. In the sliding faces of the respective movable guides, a sliding face on the lock gear side is arranged to be parallel to a movement direction of the lock gear and the sliding face at the fixed guide side is inclined with respect to the sliding face at the side of the lock gear. Each of the movable guides engages with a spring and the spring imparts a force to the movable guides in an inner direction of a base plate.

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.

Reclining apparatus

A reclining device capable of eliminating mechanical play in a front-rear direction of a seat back is provided. Particularly, a reclining device reliably capable of locking and releasing is provided at an inexpensive cost. Movable guides are slidably disposed respectively between lock gears and a fixed guide. Each of the movable guides is formed in a shape that the width thereof gradually decreases from the outer end toward the inner end. In the sliding faces of the respective movable guides, a sliding face on the lock gear side is arranged to be parallel to a movement direction of the lock gear and the sliding face at the fixed guide side is inclined with respect to the sliding face at the side of the lock gear. Each of the movable-guides engages with a spring and the spring imparts a force to the movable guides in an inner direction of a base plate.

Growing community of inventors

Ichinomiya, Japan

Yoshitaka Ishihara