Abstract: A reclining device for a seat, comprising a stationary base plate and rotatable plate, both being fitted together, with the rotatable plate free to rotate relative to the base plate. An annular toothed portion and an unlock area are respectively formed in either of those two plates, and a lock gear is interposed between the plates in a vertically slidable manner such that, with the rotation of the rotatable plate, the lock gear is disengaged from the toothed portion and rides on the unlock area, or vice versa, to thereby place the reclining device in a locked or unlocked state, by simply operating a lever to effect such engagement/disengagement of the lock gear to the toothed portion.

Abstract: A slide rail is shown for adjusting the longitudinal position of a seat used in connection with a vehicle, such as an automobile. The slide rail comprises a moveable rail having a U-shaped lower section, and adapted for connection to the seat; upper and lower sliders, respectively disposed on the top and bottom surfaces of a flange forming part of the lower portion of the moveable rail; and a square fixed rail adapted for connection to the floor of the vehicle. The upper slider, which is formed from a desirably elastic material, has a number of vertically alternating projections on its top and bottom surfaces; lateral projections on its side surfaces; and slits disposed inwardly of the lateral projections. The flange is positioned in the fixed rail, together with the upper and lower sliders, so that the moveable rail can be slideably moved back and forth, providing the adjustment described.

Abstract: A seat slide device for adjusting the forward and backward positions of the seat which comprises an upper rail and a lower rail, the upper rail being slidably fitted to the lower rail. In the upper rail, there is provided an anchor plate adapted to be connected with a seat belt, the anchor plate having a plurality of hook members arranged in correspondence with a plurality of engagement holes formed in the lower rail. When an upward pulling force is exerted on the anchor plate, the hook members are brought to engagement into the engagement holes, to thereby prevent removal of the upper rail from the lower rail.

Abstract: A seat slide device for adjusting the forward and backward positions of the seat which comprises an upper rail and a lower rail, the upper rail being slidably fitted to the lower rail, in which a seat belt is at its one end secured to one of the upper rail and seat. In one of the upper and lower rails, formed are a plurality of projected pieces, while in the other of those rails, formed are a plurality of incised portions, so that, when an upward pulling force is exerted upon the upper rail via the seat belt, the projected pieces are pressed against the incised portions to bend them and pass therethrough, thereby causing a mutual direct engagement of the upper and lower rails to prevent removal of the upper rail from the lower rail.

Abstract: An adjustment device to adjust the depth and height of a seat cushion, the longitudinal positions of a headrest and the like in a seat for use in a vehicle such as an automobile is disclosed. In the adjustment device, a rod is rotatably journaled on the side of fixed means thereof, a pair of link members are respectively fixed to the rod at the first ends thereof with the free ends thereof being connected to a movable member, there is provided in said fixed means a crankshaft having a pair of bent portions on the substantially 180.degree. opposing sides thereof, and the bent portions of the crankshaft are respectively inserted through and engaged with slits formed in the two link members, whereby the link members are rotated by rotating the crankshaft so as to be able to move or adjust the movable member relative to the fixed means.

Abstract: A seat slide device adapted to adjust the forward and rearward positions of an automobile seat, comprising an upper rail, a lower rail, the upper rail being slidably fitted to the lower rail, and a reinforcing member. The reinforcing member is fixed to the upper rail and has a plurality of claw members which are engageable with the lower rail. When a pulling force is applied to the upper rail, the claw members are engaged with the lower rail so as to prevent the removal of the upper rail from the lower rail as well as the longitudinal dislocation of the upper rail relative to the lower rail.

Abstract: A reclining device mounting structure in an automotive seat, in which a lower bracket of the reclining device is mounted on an upper rail of a sliderail adapted for fore-and-aft adjustment of the seat. More particularly, disclosed is this kind of structure in which the lower bracket of the reclining device is mounted on an mounting portion in the rearward region of an upwardly raised portion formed in the upper rail. The mounting portion is therefore located above the lower rail of the slide rail and in the rearward portion of a seat back of the seat, thus making it easier the mounting of the reclining device on the upper rail.

Abstract: A reclining device for use in an automotive seat is disclosed. Most parts of the reclining device are included within an upper rail of a slide rail to which a seat cushion is mounted. A sector gear with one end thereof fixed to a seat back is engaged with one of the parts included within the upper rail. The seat back can be rotated about the mounting portion of the sector gear to the upper rail and thus the angle of inclination of the seat back can be adjusted finely without impairing the sitting feeling of an occupant.

Abstract: A height adjusting device is disclosed which adjusts the height of a seat cushion of an automotive seat in the vertical direction. In the height adjusting device, a seat cushion frame is mounted to one end of a bell crank rotatably supported by an upper rail of a seat adjuster, a connecting rod is connected to the other end of the bell crank, there is formed in the free end portion of the connecting rod a rack portion intermeshable with a pinion gear cooperatively connected with an operation knob, and the rack portion is grasped by and between the pinion gear and a rotary roller mounted to the upper rail.

Abstract: A height adjuster operation mechanism which is adapted to independently adjust the heights of the front and rear portions of a seat cushion of an automotive seat.

Abstract: A fixing device for a vehicle seat back comprises a support element mounted on the vehicle side wall, and a pivotal hook element engageable with the support element. A set part of the support element includes a hook-preventing upward extension for preventing the hook element from slipping off the set part. A bracket is mounted on the seat back together with the hook element, the bracket having a leg supporting a cushion which engages the set part in an upright and a locked position of the seat back. The bracket leg has an edge confronting the extension and engages therewith upon application of external forward and rearward loads on the seat back.

Abstract: The present invention relates to a seat lifter employed for a vehicle seat comprising a rotary fulcrum being mounted at the front portion of a seat cushion of the seat, a link mechanism for rotating the seat centering around the rotary fulcrum being mounted at the back portion thereof, a link mechanism for supporting and adjusting the link of said link mechanism by means of an offset pin formed projectly on a disc with a tooth groove being provided, thereby adjusting a seat angle and elevating the movement of the seat by rotary adjustment of the seat centering around the rotary fulcrum.

Abstract: A light seat frame for a vehicle seat containing a seat cushion, which can slide forward and backward, containing a reinforcing arm, fixed between a front member and left and right side members of the frame to resist deformation.

Abstract: A seat adjuster for use with a seat used in a vehicle, an airplane or the like is disclosed in which a movable rail is formed integrally with a side frame of a cushion frame, and in which either of the movable rail or a fixed rail fixed to a vehicle body is provided on its surface facing toward the other rail with a plurality of projections so that loads applied to the movable rail can be transmitted to the fixed rail by means of these projections.

Abstract: A seat structure containing a frame for a back seat, and a panel for a headrest, which panel is welded in a surrounding manner about said frame.

Abstract: Two spaced wings are mounted on the inner side of a seatback base plate in a manner to pivot about respective axes parallel to the seatback plane. Adjusting levers which move synchronously are connected at respective ends thereof to the wings to transmit the movement of the levers to the wings. An operating device is connected to one of the levers for manually adjusting the lever position.

Abstract: A slide adjustment device for use in a seat of a moving vehicle such as an automobile or airplane. The device includes a lower rail adapted to be attached to the floor of the vehicle, an upper rail to be attached to the seat, and slidably moveable with regard to the lower rail. A sliding element is provided which slides relative to the rails and is provided between the upper and lower rails.

Abstract: A backrest of a seat has therein an adjustable lumbar supporter which comprises a first rod member transversely crossing two side brackets of the backrest to be rotatable about the axis thereof, an arm member secured at one end to the first rod member, a second rod member rotatably supported by the arm member, a lumbar supporter proper fixed to the second rod member, a first control mechanism for forcing the lumbar supporter proper to swing about the axis of the first rod member when operated, and a second control mechanism for forcing the lumbar supporter proper to swing about the axis of the second rod member when operated.

Abstract: Herein disclosed is a seat backrest with an adjustable lumbar supporter which comprises a rod transversely crossing frame members of the seatback to be rotatable about the axis thereof relative to the frame members, an arm member secured to the rod, a support member pivotally connected to the arm member, lumbar pressing means such as spring connected to the support member, first control means for permitting the support member to rotate about its pivoted portion relative to the arm member when operated, and second control means for permitting the arm member and thus the rod to rotate about the axis of the rod relative to the frame members when operated.