A seat driving device includes a rotary motor having a rotary shaft, operation members, and clutch mechanisms. The operation members are separately arranged to respectively correspond to position adjustment mechanisms. The clutch mechanisms are separately arranged to respectively correspond to the position adjustment mechanisms. When any one of the operation members is operated, each clutch mechanism selectively connects the corresponding position adjustment mechanism to the rotary motor. In response to operation of any one of the operation members, the rotary motor is energized with the polarity corresponding to the operation direction of the operation member. Each clutch mechanism is arranged with respect to the rotary motor such that the axis of the clutch mechanism is parallel with the axis of the rotary shaft.

Provided is a seatback rotating device. The seatback rotating device includes an electric motor and an application mechanism. The electric motor generates a rotational force that is used to rotationally displace a seatback of a vehicle seat. The application mechanism enables application of the rotational force to the seatback. The application mechanism has a configuration that enables the seatback to be self-rotatable with gravity applied to the seatback in response to the rotational force being applied to the seatback.

Provided is a seatback rotating device used for a vehicle seat. The seatback rotating device includes an electric motor, an action mechanism, a rotor, and an abutment target portion. In the seatback rotating device, when s seatback of the vehicle sat is placed in a first standing position, the rotor is positioned in a standby state that creates a gap between a first protrusion and the abutment target portion and a gap between a second protrusion and the abutment target portion, the first protrusion and the second protrusion being provided to the rotor. In the standby state, a gap length from the first protrusion to the abutment target portion is small relative to a gap length from the second protrusion to the abutment target portion.

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 vehicle seating system includes a seat bottom and a seat back pivotably connected to the seat bottom. A first motor may operate to pivot the seat back relative to the seat bottom with a first gearing. A second motor may operate to pivot the seat back relative to the seat bottom with a second gearing. A transmission member may be disposed between the first motor and the second motor such that operation of the first motor drives the first gearing and rotates the elongate transmission member, thereby driving the second gearing.

A deceleration device for a vehicle seat comprises an external gear comprising teeth with tops projecting radially outward. A tooth of the external gear comprises a straight portion and a critical cross-section located in a dedendum flank of the tooth of the external gear. The straight portion is provided in a vicinity of the critical cross-section and a thickness of the straight portion becomes linearly larger toward a root of the tooth.

A vehicle seat includes a seat bottom and a seat back coupled to the seat bottom and configured to move relative to the seat bottom. A reclining assembly is coupled to the seat bottom and the seat back to move the seat back relative to the seat bottom.

A vehicle seat actuator includes an electric motor and a gear set that connects the drive motor to the seat and transmits the output of the motor to the vehicle seat. The drive motor and gear set are each disposed in an individual, dedicated housing component. The individual housing components are then assembled together to provide the actuator. The housing components are maintained in the assembled configuration using snap fit mechanical fasteners. Each snap-fit fastener includes a receiving portion provided on one housing component and a retaining portion provided on the other housing component. The receiving portion may be a blind hole formed in the drive motor housing that is partially obstructed by an elastic member, while the retaining component is a latch that protrudes from an outer surface of the gear housing and forms a snap-fit engagement with the elastic member.

A reclining seat assembly comprises a lower seating structure having an inboard side and an outboard side and a seatback pivotally affixed to the lower seating structure, the seatback having an inboard side and an outboard side. A gear system operatively couples one of the inboard side or the outboard side of the seatback to the corresponding inboard side or outboard side of the lower seating structure. The gear system operatively rotates the seatback relative to the lower seating structure. An actuator is coupled to the gear system to move the seatback between angular positions. A metal rod extends between the inboard side and outboard side of the seatback and has an inboard end and an outboard end. A threaded fastener assembly operably couples the inboard end and the outboard end of the metal rod to the inboard side and the outboard side of the seatback.

A vehicle seating system includes a seat bottom and a seat back pivotably connected to the seat bottom. A first motor may operate to pivot the seat back relative to the seat bottom with a first gearing. A second motor may operate to pivot the seat back relative to the seat bottom with a second gearing. A transmission member may be disposed between the first motor and the second motor such that operation of the first motor drives the first gearing and rotates the elongate transmission member, thereby driving the second gearing.