An adjustment fitting for a vehicle seat for adjusting an inclination of a backrest of the vehicle seat may have a first fitting part connectable to a seat substructure of the vehicle seat. The fitting may also have a second fitting part pivotable about an axis relative to the first fitting part and connectable to the backrest of the vehicle seat. The first fitting part and the second fitting part may be constituent parts both of a gearing unit of the adjustment fitting and of a locking unit of the adjustment fitting.

A vehicle seat comprising a seatback mounted pivoting by an articulation mechanism selectively lockable and unlockable, relative to a seatback footing selectively lockable and unlockable on a base, where the seat further comprises a seat cushion, first and second rear connecting rods connecting the seatback to the base, an actuating device being configured, by rotation of the first rear connecting rod, for driving the seatback into a folded down position when the articulation mechanism is unlocked and the seatback footing is locked on the base, and for driving the seat in a forward tilted position when the seatback footing is unlocked and the articulation mechanism is locked.

A vehicle seat assembly and a method of controlling a vehicle seat assembly are provided. The vehicle seat assembly has a seat back frame rotatably connected to a support frame, and a seat back frame positioning assembly connected to the support frame and the seat back frame. The seat back frame positioning assembly has an electric motor, and a worm connected to the motor shaft for rotation. The seat back frame positioning assembly has a reduction gearset with a first gear in meshed engagement with the worm and driving a second gear. The second gear is connected to the support frame. A controller controls the motor such that the motor shaft rotates at a first speed and at a second speed greater than the first speed, with the seat back frame is rotated relative to the support frame in response to rotation of the motor shaft.

A vehicle seat comprising a seatback mounted pivoting by an articulation mechanism selectively lockable and unlockable, relative to a seatback footing selectively lockable and unlockable on a base, where the seat further comprises a seat cushion, first and second rear connecting rods connecting the seatback to the base, an actuating device being configured, by rotation of the first rear connecting rod, for driving the seatback into a folded down position when the articulation mechanism is unlocked and the seatback footing is locked on the base, and for driving the seat in a forward tilted position when the seatback footing is unlocked and the articulation mechanism is locked.

A gear assembly includes motor, a first gear, one or more planet gears, a first ring gear, and/or a second ring gear. The motor may be configured to rotate the first ring gear at a first speed and/or a second speed. The first gear may be configured to rotate the one or more planet gears. The planet gears may be configured to engage the first ring gear and/or rotate the second ring gear. The second speed may be greater than the first speed. Each of the one or more planet gears may include a first portion and/or a second portion. The first portion may include a first radius, and/or the second portion may include a second radius. The first radius may be larger than the second radius.

A gear assembly includes motor, a first gear, one or more planet gears, a first ring gear, and/or a second ring gear. The motor may be configured to rotate the first ring gear at a first speed and/or a second speed. The first gear may be configured to rotate the one or more planet gears. The planet gears may be configured to engage the first ring gear and/or rotate the second ring gear. The second speed may be greater than the first speed. Each of the one or more planet gears may include a first portion and/or a second portion. The first portion may include a first radius, and/or the second portion may include a second radius. The first radius may be larger than the second radius.

A seat recliner for a vehicle may include: a fixing flange provided with multiple guide parts spaced apart from each other and having a guide groove formed along a locus having a predetermined distance from a center axis; and a rotary cam mounted on a center portion of the fixing flange, rotating about the center axis to press a locking gear such that the locking gear slides along the guide parts. In particular, the rotary cam includes: a first protrusion formed on a mount surface of the rotary cam, which is coming into contact with the fixing flange when mounted; and a second protrusion formed on a surface opposite to the mount surface and capable of engaging with a control plate. When the first protrusion is inserted into the guide groove, the guide groove guides a rotation of the rotary cam.

A seat drive device includes a first operation restricting portion provided to a first transmission member and restricting a second operation member from being operated to move from an original position to an adjustment position in a state where a first operation member has been operated to move from an original position to an adjustment position and the first transmission member has been operated to move in response thereto, and a second operation restricting portion provided to a second transmission member and restricting the first operation member from being operated to move from the original position to the adjustment position in a state where the second operation member has been operated to move from the original position to the adjustment position and the second transmission member has been operated to move in response thereto.

A single motor dual-motion actuator and method for a vehicle seat includes a pin actuator rotatable in the first rotatable direction from a pin actuator rest position toward a pin actuator first position and rotatable in a second rotatable direction from the pin actuator rest position toward a pin actuator second position. The actuator further includes a first actuator component and a second actuator component. The first actuator component is co-rotatable with the pin actuator from a first actuator component rest position in the first rotatable direction toward a first actuator component actuating position when the pin actuator is rotated to the pin actuator first position. The second actuator component is co-rotatable with the pin actuator from a second actuator component rest position in the second rotatable direction toward a second actuator component actuating position when the pin actuator is rotated to the pin actuator second position.

A seat adjustment mechanism includes a first component and a second component movable relative to the first component. A drive mechanism is drivingly connected to the second component for moving the second component relative to the first component. The drive mechanism includes a drive motor drivingly connected to a first gear member having conical involute teeth. A second gear member includes conical involute teeth in meshing engagement with the conical involute teeth of the first gear member. The conical involute teeth have a tapered tooth thickness, a tapered root and a tapered outside diameter.