A restricting structure that restricts an allowable adjustment range of a backrest angle of a seatback is formed by a surface abutment structure of a bracket provided on the seatback, and an additional stopper provided on a seat cushion. The additional stopper is joined to a lower arm in a state positioned by a positioning hole in the additional stopper being fit onto a positioning pin that is integrated with the lower arm. A plurality of arrangement positions of the additional stopper are able to be selected by providing the positioning pin in a plurality of locations with respect to the lower arm along a path of a specific location along which additional stopper moves with respect to the lower arm, when the backrest angle of the seatback is changed while the additional stopper is surface abutted against, and temporarily fixed to, the bracket.

A seat reclining mechanism has a protective device at the shell. The shell has an inner cover and an outer cover with a support plate set therein. The upper part of the shell has a gap for accommodating the rotation of an arm of a rotating plate extends out of the gap. A fence plate cooperates with the arm to keep the gap closed.

To reduce an operation synchronization failure of recliners on both sides of a seat frame, thereby enabling smoother operation despite variations in the dimensional accuracy of the seat frame. A seat recliner structure includes: recliners which are provided on the left and right sides of a cushion frame and a back frame to recline the back frame relative to the cushion frame; and a connecting rod which connects the left and right recliners to synchronize them, wherein the left and right recliners have different backlashes, and the backlash of the driving-side recliner is smaller than the backlash of the driven-side recliner.

To reduce an operation synchronization failure of recliners on both sides of a seat frame, thereby enabling smoother operation despite variations in the dimensional accuracy of the seat frame. A seat recliner structure includes: recliners which are provided on the left and right sides of a cushion frame and a back frame to recline the back frame relative to the cushion frame; and a connecting rod which connects the left and right recliners to synchronize them, wherein the left and right recliners have different backlashes, and the backlash of the driving-side recliner is smaller than the backlash of the driven-side recliner.

A vehicle-seat-recliner assembly may include first and second recliner hearts, a release handle, a cross-member, a handle pin, a handle-travel-limiter, and a reinforcement member. The release handle is connected with the first recliner heart and is rotatable relative to the brackets to move the first recliner heart between locked and unlocked states. The cross-member is connected to the recliner hearts and transmits torque from the release handle to the second recliner heart to move the recliner hearts between the locked and unlocked states. The handle pin engages the release handle. The handle-travel-limiter may include a flange portion and a shaft portion. The shaft portion may include an aperture configured to receive the cross-member. The flange portion extends radially outward from the shaft portion. The handle pin engages the handle-travel-limiter. The reinforcement member may be fixed to the handle-travel-limiter and the handle pin.

A vehicle-seat-recliner assembly may include first and second recliner hearts, a release handle, a cross-member, a handle pin, a handle-travel-limiter, and a reinforcement member. The release handle is connected with the first recliner heart and is rotatable relative to the brackets to move the first recliner heart between locked and unlocked states. The cross-member is connected to the recliner hearts and transmits torque from the release handle to the second recliner heart to move the recliner hearts between the locked and unlocked states. The handle pin engages the release handle. The handle-travel-limiter may include a flange portion and a shaft portion. The shaft portion may include an aperture configured to receive the cross-member. The flange portion extends radially outward from the shaft portion. The handle pin engages the handle-travel-limiter. The reinforcement member may be fixed to the handle-travel-limiter and the handle pin.

A rotary recline mechanism for allowing reclining movement of a first part relative to a second part, the mechanism comprising: a first gear mechanism comprising first and second gear rings having first and second sets of teeth that engage to lock the first and second parts relative to each other and disengage on operation of an actuator to allow relative movement of the first and second parts by application of a force on one of the parts in a first direction, and a second override gear mechanism to allow relative movement of the first and second parts by application of a force in a second direction while the first and second sets of teeth are engaged.

A method for manufacturing a recliner mechanism may include movably attaching a first plate of a recliner heart to a second plate of the recliner heart, positioning a gap ring onto the first plate of the recliner heart, positioning an encapsulation ring around the first and second plates such that the gap ring is disposed axially between the first plate and the encapsulation ring, and removing at least a portion of the gap ring from between the first plate and the encapsulation ring to form a clearance gap between the first plate and the encapsulation ring.

A disc recliner mechanism for use in an automotive vehicle includes a plurality of pawls and a cam mounted between a guide plate and a tooth plate. Rotation of the cam moves the pawls between an extended position in which the pawls engage the tooth plate to lock the disc recliner mechanism and a retracted position in which the pawls disengage the tooth plate to unlock the disc recliner mechanism and allow rotation between the guide plate and the tooth plate. A notch is disposed on an engagement surface of a cam lobe disposed on the cam for reducing friction when the cam lobe engages a cam follower disposed on the pawls. The tooth plate includes a circumferential outer lip with a concentric channel for retaining lubricant and reducing rotational friction between the tooth plate and the guide plate.

A fitting arrangement for a vehicle seat including two fitting parts adjustable relative to each other about an adjustment axis and forming a bearing space, a locking element disposed in the bearing space on one of the two fitting parts and radially adjustable with respect to the adjustment axis between an unlocking position, in which the two fitting parts are pivotable relative to each other and a locking position, in which the two fittings parts are non-rotatably locked to each other, and at least one adjuster part pivotally mounted within the bearing space for adjusting the locking element between the unlocking position and the locking position. The at least one adjuster part mounted on a bush element on which a cover element is provided for sealing the bearing space and attached axially with.