Abstract: A power seat apparatus for an automotive vehicle in which a screw shaft supported on an upper rail having a seat cushion fastened thereto is moved relative to a lower rail secured to the vehicle body by a speed reducer and motor fixedly mounted on the lower rail. A coupling is provided for coupling an input shaft of the speed reducer and an output shaft of the motor. The input shaft has a longitudinally extending first groove at a distal end thereof, and the coupling has a first wall portion at one end for being inserted into the first groove. The output shaft has a longitudinally extending second groove perpendicular to the first groove at a distal end thereof, and the coupling has a second wall portion at its other end for being inserted into the second groove. The coupling also has an inner wall surface at the one end for receiving an outer wall surface of the distal end of the input shaft, an an inner wall surface at the other end for receiving an outer wall surface of the distal end of the output shaft.

Abstract: An adjustable head rest device for a vehicle seat comprises a head rest body for supporting the head of an occupant of the seat. The device further includes an adjusting member for adjusting the position of the head rest body with respect to the seat continuously within a defined range of movement.

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: An upwardly and downward adjustable headrest assembly for the seat backrest of a vehicle includes a fixed stay upstanding from the seat backrest, guide shoes slidable up and down along the stay and carrying a headrest body, and a locking mechanism disposed between one guide shoe and the stay for locking the guide shoe to the stay at any position therealong. The interior of the headrest provides the space needed to receive the stay as the headrest is moved up and down along the stay via the guide shoes, thereby allowing the headrest assembly to be installed on the backrest without increasing the thickness of the backrest.

Abstract: A reclining seat mechanism including a seat bracket carrying a seat cushion and a seat back plate mounted on the seat bracket for swinging movement about a shaft and carrying a seat back. A tilting angle adjusting mechanism is provided for adjusting the tilting angle of the seat back. The adjusting mechanism is provided with a tilting angle memorizing mechanism for mechanically memorizing the tilting angle of the seat back so that the memorized position can be restored when the seat back is once folded forward and returned to the tilted position. The memorizing mechanism can be actuated by the same actuating lever as the tilting angle adjusting mechanism.

Abstract: A device for adjusting the height of a cushion pad in the front part of the seat cushion of a seat, for example, for a vehicle, which has a hard plate disposed laterally of the seat cushion under the cushion pad, and a rotating mechanism connected to a shaft disposed under the cushion pad for rockably moving the front edge of the hard plate elevationally up and down between a position in the vicinity of the seat cushion frame and an upper position remote from the seat cushion frame. With this connection, the device can simultaneously adjust the height and the hardness of the cushion pad in response to the occupant's individual favorite value.

Abstract: For adjusting a seat supported by a pair of mutually slidable guide rails forwardly and rearwardly, a nut member and a screw-threaded shaft engageable with each other are secured to the guide rails, one being rotatably and the other being fixedly. A driving means is coupled to the rotatable one of the nut member and the screw-threaded shaft such that the member thus coupled is slidable along the rotating axis while permitting the transmission of torque from the driving means to the coupled member.

Abstract: A seat reclining mechanism comprising an upper bracket adapted to be secured to a seat back of a seat assembly, a lower bracket adapted to be secured to a seat cushion of the seat assembly, an internal gear provided on the upper bracket, an external gear provided on the lower bracket and adapted for meshing engagement with the internal gear the external gear being smaller in number of gear teeth than the internal gear. An eccentric shaft is provided and has a shaft portion journalling the external gear and an eccentric portion journalling the internal gear so that the gears are engaged with each other at a circumferential position. The eccentric shaft is journalled through a bearing on the lower bracket, and a manually operable knob shaft is rotatably carried by the lower bracket. A rotation transmitting mechanism is provided between the knob shaft and the eccentric shaft for transmitting rotation of the knob shaft to the eccentric shaft.

Abstract: An occupant's side holding device for the seat back of an automotive seat in which occupant's body side holders are rockably provided in the lateral direction of the seat back at both the right and left side of the seat back comprising operating shafts vertically provided at both the right side and left side, a threaded shaft rotatably journaled to the seat back frame and an interlocking rod being connected between the operating shafts for symmetrically operating the shafts. A rockable arm is further secured to one operating shaft and is integrally formed with the operating shaft to be rocked in the lateral direction of the seat back upon rotation of the threaded shaft by a handle operated by the occupant. Thus, the interval between the occupant's side holders can be variably adjusted in response to the occupant's favorite side holding state of the seat by turning the handle.

Abstract: A structure for adjusting the height of the seat of an automotive vehicle including a handle-operated coupler for pivoting supporting members at the four corners of the cushion, the supporting members being mechanically coupled together for raising or lowering the cushion vertically upon the pivoting of an activator supporting member adjacent the handle. The coupler includes a driving device and a coaxial driven device operatively interconnected by a spring coiled about at least a portion of the driving device and driven device, and a housing including a shell closely fitted about the coiled spring. A driven pin is securely fitted to the actuator supporting member for pivoting the actuator supporting member upon the application of lateral force to the driven pin. The driven device includes a driving pin linked to the driven pin for pivoting the actuator supporting member upon the rotation of the handle.

Abstract: A seat back frame assembly, comprising a substantially U-shaped pipe member having a horizontal base and a pair of vertical legs extending upwardly from the horizontal base and terminating at a pair of upper ends, a transverse member having a first horizontal portion welded at the opposite ends to the upper ends of the pipe member, a first vertical portion depending from the first horizontal portion to extend along one side of the pipe member and having a lower end continuing to a second horizontal portion lying beneath the first horizontal portion between the vetical legs of the pipe member, and a second vertical portion depending from the second horizontal portion along the other side of the pipe member, each of the first and second vertical portions having opposite edge portions welded to the legs of the pipe member, the first horizontal portion having a pair of transversely spaced holes, the second horizontal portion having a pair of holes which are respectively aligned in vertical direction with the hole

Abstract: A heat-rest mounted at the upper edge of a seat back of a seat for a vehicle. The head-rest has stays in upright positions extending between upper and lower ends on upstanding brackets provided on both sides on the upper edge of the seat back frame, and a locking unit for locking the head-rest at desired height. Thus, the mounting strength of the head-rest can be reinforced while providing a good appearance without exposing the stays.

Abstract: A device for adjusting the inclined angle of the seating surface of the seat cushion of an automotive seat essentially mounted in a vehicle. A pair of seat slide adjusting units are fixed to seat slide upper rails arranged on a floor surface and are disposed at both sides of a seat cushion frame. A sector gear plate is so secured to a bracket fixedly secured to the seat slide adjusting unit as to be elevationally rocked at its base around a fulcrum. Another bracket is fixedly secured to the seat sliding adjusting unit. A pinion gear rotated by a handle knob is journaled at the another bracket at a fulcrum. The pinion gear is coupled through a non-reversing unit with the handle knob in a manner that the gear may be freely rotated by the operation of the knob but may not be rotated by the rotating load applied from the pinion gear side. The pinion gear is engaged in mesh with the teeth of the gear plate.

Abstract: A device for forwardly and rearwardly adjusting the position of a safety headrest or pillow relative to the backrest of a vehicle seat, the headrest including a base member supported on the backrest and a frame member pivotally provided on the base member and covered by an outer cover for receiving and protecting the seat-occupant's head from shock to the vehicle. The device includes linkage pivotally interconnected between the base and frame member for permitting a link motion of the frame member relative to the base member in the forward and rearward directions, and a mechanism operable between the frame and base members for positioning and locking the frame member in a desired position on the path of the link motion thereof relative to the base member.

Abstract: This invention provides a mechanism for adjusting the angle of the seat back to the seat in which a four link mechanism is provided and a segmental gear and a manual handle cooperate for engagement with each other in locking the four link mechanism and hence the back in immovable position against a gravity of a passenger.

Abstract: An automobile seat position-adjusting assembly having slidably related outer and inner rails rigidly attachable respectively to a seat and automobile floor and a pawl member for selectively locking and unlocking the rails. The inner rail has a plurality of latch recesses, and the pawl member is pivoted on an edge of the outer rail and includes a tooth extending through the outer rail to selectively engage with one of the plurality of latch recesses so as to lock and unlock the slidable rails as the pawl member's handle is manually rotated. The pawl member has a curved lip hinge portion which encloses a protruding edge of the outer rail and is held in place by a spring and the interaction of the pawl and the rails.

Abstract: A hinge fitting for an adjustable vehicle seat includes a seat bracket fixedly secured to a seat and provided with a plurality of notches thereon, a back rest bracket fixedly secured to a back rest, a link member rotatably mounted on the seat bracket at one end thereof through a first pivot pin and rotatably mounting the back rest bracket at the other end thereof through a second pivot pin, respectively, a first pin selectively engageable with one of the plurality of notches and for restricting rotation of the link member about the first pivot pin relative to the seat bracket, a second pin for independently rotating the back rest bracket about the second pivot pin relative to the link member upon folding the back rest on the seat and for integrally rotating the back rest bracket and the link member upon rearwardly tilting the back rest, a handle lever rotatably supported about the first pivot pin for disengaging the first pin from one of the plurality of notches, and a connecting member for disengaging the fi

Abstract: A vehicle seat slide adjuster includes a pair of guide rails which are slidable relative to each other one being secured to a vehicle seat and the other secured to a vehicle stationary part, and a latch mechanism for locking the seat to its desired or selected position after the relative sliding movement between the guide rails. The latch mechanism includes a pawl provided on one of the guide rails, latch holes provided on the other of the guide rails, and a pawl actuating lever for actuating the engagement and disengagement of the pawl and the latch hole, wherein the pawl actuating lever and the pawl are integrally formed in one piece and disposed within one of the guide rails.