The invention relates to a bracket (20) of a vehicle seat connecting a backrest (12) to a seat portion (11), including a hinge (10) which includes a first flange (3) and a second flange (4) connected to one another by means of inner peripheral teeth (31), thus defining an interface plane (P) perpendicular to the hinging axis and passing through said inner peripheral teeth, a first framework (5) of the backrest connected to the first flange (3) via a first attachment (1), a second framework (6) of the seat portion connected to the second flange (4) via a second attachment (2), the first attachment and the second attachment (1, 2) being arranged on the same side relative to the interface plane (P), the attachments preferably being welds.

A deceleration device comprising first and second gears that have different numbers of teeth. A cam mechanism is disposed on the same axis as the first gear, engages the first gear with the second gear in a state of eccentricity. A connecting shaft is disposed on the same axis as the first gear and is connected to the cam mechanism. A rotating body is disposed on the same axis as the second gear and is connected to the connecting shaft. When the connecting shaft is inserted into a long hole of the rotating body, the rotating body is connected to the connecting shaft in an eccentric position. The major axis of the long hole is set so as to allow the rotating body and the connecting shaft to move relative to one another along the longitudinal direction of the long hole.

Provided is a new back frame for a vehicle seat that takes into consideration a case where a large load acts on the back frame from a seat width direction. The back frame comprises a first side frame, a second side frame, a transmission rod, and a resin-made pressure-receiving spacer. The transmission rod extends in an extending direction from the first side frame toward the second side frame and comprises a leading end closest to the second side frame in the extending direction. The pressure-receiving spacer is coupled to the second side frame at a position facing the leading end. The transmission rod transmits a load acting on the first side frame to the leading end. The pressure-receiving spacer is configured to receive the load from the leading end.

Described is recline mechanism for a comfort seating assembly such as a theater seat which can be mounted on a sloped surface. In a fully recline position, the seating assembly is compact with a layout that falls generally within its profile. The recline mechanism includes a pair of each of: seat rail brackets, front pivot links, rear pivot upper lift link to control the motion of the rear end of the assembly, rear pivot links each attached to one rear pivot upper lift link, carrier links, each carrier link attached to one front pivot link and to a rear pivot link and a pair of rear pivot upper lift control links, attached to a pivot upper lift link and to a carrier link. A linear actuator attached by motor drive tubes at two ends of the linkage system transitions the recline mechanism between the closed and recline positions.

A disc recliner 18 for a seat assembly includes a fixed plate 22 secured to a seat cushion 12 and a rotatable plate 30 secured to a seat back 14. Each of the fixed and rotatable plates 22,30 has a plurality of teeth 40,48, the number of teeth not being equal. A flex spline 26 has a plurality of teeth 52, the number of teeth being equal to the number of teeth on the fixed plate 22. A wave generator 28 causes a portion of the teeth 52 on the flex spline 26 to meshingly engage with the teeth 40,48 on the fixed and rotatable plates 22,30. Rotation of the wave generator 28 causes the teeth 52 on the flex spline 26 which meshingly engage with the teeth 40,48 on the fixed and rotatable plates 22,30 to change, thereby causing the rotatable plate 30 to rotate relative to the fixed plate 22, which in turn causes the seat back 14 to pivot relative to the seat cushion 12.

A seat reclining device includes: a first gear member; a second gear member; paired wedge members arranged in an eccentric space; a biasing member which biases the paired wedge members in directions away from each other; and a drive member. The drive member includes a first drive protrusion which is arranged in a small-width portion of the eccentric space and a second drive protrusion which is arranged in a large-width portion of the eccentric space. When the drive member rotates the paired wedge members, counterforce acting on a shaft portion of the drive member against first pressing force generated by the first drive protrusion pressing one of the paired wedge members and second pressing force generated by the second drive protrusion pressing the other one of the paired wedge members pushes a boss portion of the first gear member in a direction toward the one wedge member.

An articulation mechanism comprising first and second frames mounted in a rotatable manner with respect to one another and connected together by a gear controlled by an input member (11) actuating an eccentric cam mounted in a rotatable manner in a cylindrical housing integral with the first frame. The cam is formed of two cam parts that are elastically urged towards a position of maximum eccentricity and are movable towards a position of minimum eccentricity during actuation of the input member. A load-spreading washer is mounted in a rotatable manner with play in the cylindrical housing, parallel to the eccentric cam.

A seat adjuster for a vehicle seat is provided. The seat adjuster comprises a rotation mechanism that comprises a rotation part, a rotation drive device that rotates the rotation part, an engagement target member that is configured to be rotated integrally with the rotation part and comprises engagement target portions formed along a rotational direction of the engagement target member, and an engagement member that is configured so that, when one of the engagement target portions is located in a specified engageable position, the engagement member is moved in a direction closer to the engagement target member to be engageable with the one of the engagement target portions located in the specified engageable position.

An adjustment arrangement for adjusting a vehicle seat component of a vehicle seat comprises an adjusting mechanism for adjusting the vehicle seat component and an electrical drive device. The electrical drive is coupled to the adjusting mechanism for the electrical actuation of the adjusting mechanism

A joint fitting for a motor vehicle seat may have a first fitting part with a first sprocket and a second fitting part with a second sprocket. The fitting may also have a gear which rolls in the first sprocket and in the second sprocket to generate a rotational movement between the two sprockets. The fitting may also have an eccentric which is arranged between the first fitting part and the gear for driving a rolling movement of the gear in the first sprocket. The eccentric may have two wedge segments and a spring which pushes the wedge segments apart. An additional eccentric is arranged between the second fitting part and the gear for removing a play between the gear and the second sprocket. The additional eccentric may have two wedge segments. A vehicle seat having at least one such gearing fitting is also provided.