A backrest recline mechanism including a first shaft attachable to a first seat assembly component and a second shaft attachable to a second seat assembly component. The first shaft has a slotted ring defining capture slots and an interior annular space. A control ring has a first end disposed in the annular space. The second shaft is engaged with a second end of the control ring. A first collar, having a plurality of release recesses, is rotatably disposed around the slotted ring. First bearings respectively retained within the capture slots are beneath the first collar. In a first rotational position of the first collar, the plurality of release recesses align with the capture slots to rotationally disengage the first and second components. In a second rotational position, the release recesses misalign with the capture slots to rotationally engage the first and second seat assembly components.

A backrest recline mechanism including a first shaft attachable to a first seat assembly component and a second shaft attachable to a second seat assembly component. The first shaft has a slotted ring defining capture slots and an interior annular space. A control ring has a first end disposed in the annular space. The second shaft is engaged with a second end of the control ring. A first collar, having a plurality of release recesses, is rotatably disposed around the slotted ring. First bearings respectively retained within the capture slots are beneath the first collar. In a first rotational position of the first collar, the plurality of release recesses align with the capture slots to rotationally disengage the first and second components. In a second rotational position, the release recesses misalign with the capture slots to rotationally engage the first and second seat assembly components.

A seat adjuster having a fixed part (12), a drive element (26), an output element (22, 24), a clamping body coupling arrangement (16) by means of which a back and forth movement of the drive element (22, 24) out of a neutral position and back into the neutral position is converted into a continued movement of the output element (22, 24) in a uniform direction of rotation, and a releasable locking device for locking the output element (22) in a form-fitting manner on the fixed part (12), characterized in that the locking device is formed by a locking ring (74) which is axially displaceable between a locking position, in which it is non-rotatably coupled to the output element (22), and a release position, and cam surfaces (82, 84) are formed on the locking ring (74) and the drive element (26), which cam surfaces are complementary to one another and translate a rotation of the drive element (26) away from the neutral position into an axial movement of the locking ring (74) into the released position.

A hinge comprising a first and a second plate intended to be connected respectively to a first and to a second vehicle seat element, the first plate comprising a base toothed portion with N teeth, a plurality of sets of rolling elements, each radially movable between at least one locking position, in which the rolling element is at least partially engaged in a space between two teeth, and an unlocking position in which the rolling element is disengaged from the space, a plurality of movable cams, each cooperating with the rolling elements of a different set, so as to cause the rolling elements to transition from their unlocking position to a locking position, and vice versa, and a control hub, able to move the cams.

A reclining device for a vehicle seat includes a housing having one side opened to communicate with an interior of the housing, a clutch drum inserted into the housing, configured to be rotatable, and having one side directed toward the housing and opened to communicate with an interior of the clutch drum, a cam inserted into the clutch drum and configured to receive a rotational force from the outside of the housing and transmit the rotational force to the clutch drum, and a brake drum configured to receive the rotational force from the clutch drum and having a center to which a shaft is coupled, in which a plurality of coupling protrusions is provided on one surface of the cam directed toward the housing, and the coupling protrusions penetrate the other side of the housing and are inserted into coupling holes of a lever bracket.

A seat adjuster having a fixed part (12), a drive element (26), an output element (22, 24), a clamping body coupling arrangement (16) by means of which a back and forth movement of the drive element (22, 24) out of a neutral position and back into the neutral position is converted into a continued movement of the output element (22, 24) in a uniform direction of rotation, and a releasable locking device for locking the output element (22) in a form-fitting manner on the fixed part (12), characterized in that the locking device is formed by a locking ring (74) which is axially displaceable between a locking position, in which it is non-rotatably coupled to the output element (22), and a release position, and cam surfaces (82, 84) are formed on the locking ring (74) and the drive element (26), which cam surfaces are complementary to one another and translate a rotation of the drive element (26) away from the neutral position into an axial movement of the locking ring (74) into the released position.

A reclining device for a vehicle seat includes a housing having one side opened to communicate with an interior of the housing, a clutch drum inserted into the housing, configured to be rotatable, and having one side directed toward the housing and opened to communicate with an interior of the clutch drum, a cam inserted into the clutch drum and configured to receive a rotational force from the outside of the housing and transmit the rotational force to the clutch drum, and a brake drum configured to receive the rotational force from the clutch drum and having a center to which a shaft is coupled, in which a plurality of coupling protrusions is provided on one surface of the cam directed toward the housing, and the coupling protrusions penetrate the other side of the housing and are inserted into coupling holes of a lever bracket.