Abstract: The present invention is directed to a seat reclining apparatus for a vehicle having a seat cushion and a seat back pivotally hinged thereto. A lower arm is secured to the seat cushion, while an upper arm is secured to the seat back. The lower arm and upper arm are rotatably mounted on a rotating shaft. A load sustaining mechanism is provided between the lower arm and the upper arm, and sustains a reaction force which is caused to be applied to the rotating shaft when the locking mechanism restrains the rotation of the upper arm relative to the lower arm. The load sustaining mechanism may comprise an arcuate protruding portion formed on the lower arm, and an arcuate groove formed on the upper arm for receiving the protruding portion.

Abstract: A seat reclining apparatus includes a lower arm for attaching or fixing a seat-cushion, an upper arm for attaching or fixing a seat-back, a shaft rotatably disposed in the lower arm and fixed to rotate with the upper arm, a locking mechanism disposed between the lower arm and the upper arm and having a ratchet and a pawl, the pawl being movable toward and away from the ratchet for establishing a meshing engagement therebetween and releasing the meshing engagement, respectively, and a regulating gear configured at least as large as one of the ratchet and the pawl in a pitch circle and adjacent to the other of the ratchet and the pawl so as to be engagable with one of the ratchet and the pawl while the pawl is in meshing engagement with the ratchet.

Abstract: A seat reclining apparatus includes a lower arm for mounting a seat cushion, a shaft having a first centric portion rotatably supported at the lower arm, an eccentric portion and a second centric portion of the shaft, an upper arm for mounting a seat-back, mounted on the eccentric portion of the shaft and having an inner gear, a locking arm mounted on the second centric portion of the shaft, engaged with the lower arm, and having an outer gear meshed with the inner gear of the upper arm, the number of teeth of the outer gear differing from that of the inner gear, a release device for releasing the engagement between the locking arm and the lower arm, a bushing secured to the lower arm and rotatably supporting the second centric portion of the shaft, a spiral spring mounted on the bushing and having an inner end connected thereto and an outer end connected to the locking arm for urging the locking arm in one direction, a handle connected to the shaft, and a braking device disposed between the bushing and the h

Abstract: A lumbar support device includes a seat-back having a first upstanding frame and a second upstanding frame spaced therefrom in the lateral direction, a bilateral asymmetrical torsion spring having a first end portion which is rotatably supported by the first upstanding frame and a second end portion, a supporting plate mounted on the bilateral asymmetrical torsion spring, and a driving device disposed between the second upstanding frame and the second end portion of the bilateral asymmetrical torsion spring for moving the bilateral asymmetrical torsion spring in the direction of the thickness of the seat-back, wherein a degree of a deformation of the first end portion of the bilateral asymmetrical torsion spring is less than that of the second end portion of the bilateral asymmetrical torsion spring.

Abstract: A height adjusting device for a seat comprises a seat-cushion, an operating mechanism for moving simultaneously a frontward portion and a rearward portion of a seat-cushion in the vertical direction, and a reclining mechanism for adjusting of the reclining angle of the seat-cushion by moving the frontward portion thereof in the vertical direction wherein the operating mechanism is operated without affecting the adjusted reclining angle of the seat-cushion established by the reclining mechanism.

Abstract: A seat slide adjuster includes a lower rail fixed to a vehicle floor and an upper rail slidable with respect to the upper rail. Each portions of respective rais are integrally formed so that thickness of each portions of the rails are easily selected to with stand a high load in collision. Oblique portions of the rails which are opposed to each other will be brought into contact to receive the high load.

Abstract: In a seat sliding device, an upper rail slidably moveable relative a lower rail interlocks with the lower rail upon movement of the upper rail away from the lower rail. An upwardly inclined portion and a downwardly inclined portion can be provided on the upper rail and the lower rails, respectively. A spacer element is provided between the upwardly inclined portion of the upper rail and a corner of the lower rail. The inclined portions and the spacer elements interlock upon movement of the upper rail away from the lower rail. Due to sufficient area being provided between the interlocking portions, separation of the upper rail from the lower rail can be prevented.

Abstract: A spring coupler comprises a casing, a drive member rotatably mounted within the casing including a main portion and a core portion fixedly connected thereto by staking manner, a driven member rotatably mounted within the casing including a main portion and a core portion fixedly connected thereto by stacking manner and engageable with the core portion of the drive member upon rotation thereof, and a coil spring disposed between the drive member and the casing so as to be engaged frictionally with the casing in the free state thereof and including a first tang and a second tang.

Abstract: A slide locking device for a car seat, provided with a pair of lock plates fixed to a car body and having a plurality of locking retained portions, a pair of lock levers each having an engaging portion engageable with one of the retaining portions, and a pair of lock shafts for swingably supporting the lock levers, so that between the lock levers is stretched one tension coil spring for biasing the engaging portion of each lock lever in the direction of engaging with the retained portion at each lock plate.

Abstract: An apparatus for adjusting the height of a seat for an automobile has a handle disposed on a seat adjuster, a spring coupler operatively connected to the handle, a link operatively connected to the handle through the spring coupler, and a rod for connecting the link to a link disposed on the other side. A balance spring is incorporated in the spring coupler, one end of the spring being retained by a casing, and the other end of the spring being retained by a driven member. Accordingly, the balance spring is advantageously suitable for balancing the seat within the seat height adjustable range.

Abstract: A vehicle seat adjustment apparatus includes a height control device and an inclination control device mounted on a seat frame for independently adjusting the height and inclination of a vehicle seat. A support base slidably supports a seat in a forward and a rearward direction. The seat frame means is mounted on the support base for supporting the seat. A rear portion of the seat is pivotally attached to the seat. A plurality of links pivotally connect the seat frame to the support base for raising and lowering the seat frame relative to the support base to adjust the height of the seat. The plurality of links include a control link, which is rotatably mounted on the seat frame. The height control device is connected to the control link and holds the plurality of links in a selected pivotal position. The height control device is operative to rotate the control link in a first direction to raise the seat and to rotate the control link opposite the first direction to lower the seat.

Abstract: A seat reclining mechanism includes a first bracket attached to a seat back of a seat assembly and a second bracket attached to a seat cushion of the seat assembly, an internal gear provided on the first bracket, an external gear provided on the second bracket for engagement with the internal gear. Both gears are rotatably supported on the eccentric shaft for relative rotation of the first and second brackets. Further, a bearing member is disposed between the first and second brackets for reducing the friction therebetween upon relative rotational movement.

Abstract: A seat back reclining mechanism for a vehicle seat includes an upper and lower brackets respectively secured to the seat back and the seat cushion. A reduction gear mechanism is provided between the upper and lower brackets for a stepless adjustment of the reclining angle. An actuating knob is located at one side of the seat cushion for the convenience of operation. A belt-sprocket type motion transmitting mechanism is provided between the actuating knob and the reduction gear mechanism for transmitting a rotation of the knob to the gear mechanism. In order to prevent the seat back from being inclined under the load applied by the passenger, a constraining device is provided for preventing the motion transmitting mechanism from transmitting the force from the reduction gear mechanism.

Abstract: Spring coupler apparatus including a driving member and a driven member coaxially mounted in a case, the driving member including a substantially circular annular body having a pair of fan-shaped flanges extending diametrically therefrom with upstanding portions at the end of the flanges forming recesses therebetween, and the driven member also including a pair of diametrically opposed fan-shaped flanges with projections extending upwardly from the ends thereof into the recesses. A relatively larger diameter spring is wrapped around the upstanding portions and projections and is in frictional engagement of the outer wall of the case in the free state of the spring, one tang end of the spring being engaged in a slit in one of the projections, and a tang on the free end of the spring being engageable with one of the upstanding portions of the driving member.

Abstract: A vertically adjustable seat for vehicles which includes a shaft member, an axle connected to said shaft, a lever member operatively connected to a rear end portion of the seat at a first end thereof and to the axle and connected with a shaft member at a second end thereof opposite the first end, a female screw member forwardly and rearwardly moveable and operatively connected to the second end of a lever member by the axle, the handle fixedly connected to a front end portion of the shaft member and a supporting member for supporting the shaft member at front and rear side portions adjacent the female screw member.