Aisin Seiki Kabushiki Kaisha

Masafumi Narita

Genta Moriyama

Masaharu Nakamura

Takashi Kitano

A seat reclining apparatus includes a first member including a first tubular portion, a second member including a second tubular portion, a pair of wedge members each including a protruding portion, a biasing member biasing the wedge members, an input member pressing the protruding portion to rotate the wedge members, a pressing point via which the input member presses the wedge member, a radially inward contact point via which the wedge member is contactable with the first tubular portion, and a radially outward contact point via which the wedge member is contactable with the second tubular portion, wherein in a state where a biasing force of the biasing member is largest because of a dimensional variation in manufacturing, a pressing force line passing through the pressing point is identical to an intermediate line between first and second tangent lines passing through the radially inward and outward contact points.

Seat reclining apparatus

A seat reclining apparatus for a vehicle includes a first arm arranged at a seat cushion, a second arm arranged at a seat back, an internal gear formed at the first arm, an external gear formed at the second arm and engaging with the internal gear, a first circumferential portion formed coaxially with the internal gear, a second circumferential portion formed coaxially with the external gear, first and second wedge members accommodated in an accommodating space formed between the first and second circumferential portions, a spring arranged between the first and second wedge members and biasing the first and second wedge members, a drive shaft rotating around a rotation axis of either one of the first and second arms, and a retention groove retaining a lubricant, formed on the circumferential contact surface of each of the first and second wedge members, and extending along a direction of the rotation axis.

Seat reclining apparatus for vehicle

A vehicle seat includes a seat back portion, a cushion portion supported by a frame portion and provided to be movable, a supporting body included in the frame portion, a movable body included in the cushion portion and movable in the forward and backward direction, at least one guide wall provided at one of the supporting body and the movable body, and a sliding contact portion provided at the other one of the supporting body and the movable body and slidably movable, wherein the guide wall is formed, the sliding contact portion includes a main portion made of metal and a secondary portion deformed elastically, the secondary portion is interposed between the main portion and the guide wall and being in contact with the guide wall.

Growing community of inventors

Chita-gun, Japan

Masafumi Narita