Abstract: A seat recliner includes a disk-shaped outer case provided with a ring-shaped protrusion that is formed along a circumference thereof and is protruded in a thickness direction thereof, a disk-shaped inner case provided inside the ring-shaped protrusion rotatably in a circumferential direction thereof, a ring-shaped holder covering outer circumferential surfaces of the outer and inner cases to restrict displacement of the inner case so as to be distanced from the outer case, and an escape portion formed by depressing one of an opening edge portion on an inner circumferential surface of the ring-shaped protrusion and a portion, on an outer circumferential surface of the inner case, facing to the opening edge portion to be distanced from another of the opening edge portion and the portion facing to the opening edge portion.

Abstract: A seat reclining device has a base plate secured to a seat cushion, an arm member secured to a seat back, upper and lower tooth plates pivotally mounted on a base plate and provided with upper and lower teeth, a cam member pivotally mounted on the base plate, and at least one support for the lower tooth plate. When the cam member moves the lower tooth plate in a direction to bring the lower teeth into contact with the upper teeth, the upper tooth plate is locked together with the arm member so that the seat back becomes unable to pivot relative to the seat cushion. In such a locked condition, the support supports the end portion of the lower tooth plate so as to maintain the engagement of the upper and lower teeth. Thus, the seat reclining device can lock the seat back with improved strength.

Abstract: A foldable vehicle seat is constructed such that when the seat is placed in a passenger area and that a seat cushion is tipped up from a seating position, a forward-inclination stopper stops once the seat cushion at an upright position by abutting on a lock plate. When the seat is moved from the passenger area to a luggage area, the forward-inclination stopper allows inclination of the seat cushion to the most forward inclined position in accordance with a position of the lock plate.

Abstract: A seat reclining device has a base plate secured to a seat cushion, an arm member secured to a seat back, upper and lower tooth plates pivotally mounted on a base plate and provided with upper and lower teeth, a cam member pivotally mounted on the base plate, and at least one support for the lower tooth plate. When the cam member moves the lower tooth plate in a direction to bring the lower teeth into contact with the upper teeth, the upper tooth plate is locked together with the arm member so that the seat back becomes unable to pivot relative to the seat cushion. In such a locked condition, the support supports the end portion of the lower tooth plate so as to maintain the engagement of the upper and lower teeth. Thus, the seat reclining device can lock the seat back with improved strength.

Abstract: A foldable vehicle seat is constructed such that when the seat is placed in a passenger area and that a seat cushion is tipped up from a seating position, a forward-inclination stopper stops once the seat cushion at an upright position by abutting on a lock plate. When the seat is moved from the passenger area to a luggage area, the forward-inclination stopper allows inclination of the seat cushion to the most forward inclined position in accordance with a position of the lock plate.

Abstract: A seat reclining apparatus has a pair of base plates adapted to be secured to a seat cushion; a pair of arm plates adapted to be secured to a seat back, for allowing a pivotal movement of the seat back, an interlocking shaft for allowing a pivotal movement of the pair of arm plates at substantially the same time relative to the pair of base plates; a link plate formed on the interlocking shaft, the link plate having an opening; a sound-insulating member attached to the link plate, the sound-insulating member having an opening and an inside edge defined by the opening thereof, the inside edge projecting inwardly of an inside edge defined by the opening of the link plate; and a pin connected with one of the arm plates and disposed through the opening of the link plate such that the pin is allowed to sound attenuatingly abut against the inside edge of the sound-insulating member when the link plate is rotated by the interlocking shaft.

Abstract: A dual lock seat reclining mechanism includes left and right devices and a connection member connecting the left and right devices. Each device includes a base member to be fixed to a seat cushion, a swing tooth plate adapted to be fixed to a seat back and swingably mounted on the base plate through a center shaft, and a look tooth member having an external toothed portion for engaging with an internally toothed portion of the swing tooth plate. An operation member or lever is swingable between the base member and the swing tooth member, for moving the look tooth member toward and away from the internal toothed portion of the swing tooth plate for locking and unlocking. The operation member has a pin slidably received in an elongate arc hole of the base plate. A link has an outer bent portion engaged with the pin in the elongate hole, and an inner portion connected with one end of the connection member for transmission of rotation.

Abstract: An adjustable hinge mount in which a first hinge member is fixed to a seat proper or frame and a second hinge member fixed to the seat back comprises a control arrangement acting on a bearing plate with upper teeth for locking engagement with internal teeth of the second hinge member. The bearing plate is guided by spaced guide walls of the first hinge member and pushed by an elevated portion of a cam pivotable about an axle together with a lever which is pivotable about the axle. Pivoting the lever to an unlocking or released position causes the cam to disengage from the internal teeth.

Abstract: A seat reclining apparatus for adjusting an inclining angle of a seat back to a seat cushion is provided with a base plate secured to the seat cushion. An arm is secured to the seat back and is pivotably supported by the base plate. An upper tooth is secured to the arm, while a lower tooth for engaging the upper tooth is pivotably supported by the base plate. An operating structure is pivotably supported by the base plate, which operating structure operates the lower tooth to engage and disengage the lower tooth and the upper tooth.

Abstract: To minimize the width of a seat reclining device provided with a Taumel mechanism (planetary gear type angle adjusting mechanism), a motor unit is disposed on an inside surface of a base frame and within a seat cushion, and a motor output gear is disposed on an opposite outside surface of the base frame. Further, an outer gear of Taumel mechanism is formed in the base frame; an inner gear of the Taumel mechanism is formed in a reclining arm in mesh with the outer gear; and the reclining arm is disposed on the inside surface of the base frame and the reclining gear is disposed on the opposite outside surface of the base frame. Further, a shock absorbing member is disposed at the reclining gear to effectively absorb shock generated when the seat back is tilted to its extreme position stoppers.