Abstract: A seat vertical position adjusting device includes a driving mechanism equipped to a base plate portion of a seat cushion for driving a cushion frame to be movable in the vertical direction relative to the base plate portion. The driving mechanism includes a shaft having a first axial portion and a second axial portion which is positioned on the first axial portion, and eccentrically rotated relative to the first axial portion, a first internal gear, a second internal gear, and a pinion gear is mounted on the second axial portion. The number of gear teeth of the first internal gear is less than the number of gear teeth of the second internal gear at least by one.

Abstract: A seat device which includes a seat cushion frame provided in a seat cushion, a seatback frame provided in a seatback, an upper arm connected to the seatback frame, a lower arm rotatably connected to the upper arm and connected to the seat cushion frame, a lock mechanism for locking a rotation of the upper arm relative to the lower arm, a reclining device for adjusting an angle of the seatback frame relative to the seat cushion frame, a locking portion provided either one of the upper arm and the lower arm, a reinforcement member provided either on the seatback frame or the seat cushion frame opposing to said either one of the upper arm or the lower arm provided with the locking portion, and a portion to be locked provided on the reinforcement member. The portion to be locked and the locking portion are connected.

Abstract: A power sliding apparatus for a seat of the present invention includes a lower rail, an upper rail supporting a seat mounted thereon and engaged with the lower rail so as to be movable relative to each other, a screw equipped to one of the lower rail and the upper rail, a driving unit for driving the screw to be rotated so as to move the upper rail relative to the lower rail, a first rack provided at the other one of the lower rail and the upper rail and engaged with the screw having a predetermined clearance therebetween, and a second rack provided at the other one of the lower rail and the upper rail and engaged with the screw in contact therewith.

Abstract: A seat reclining device for a vehicle includes a lower arm, an upper arm rotatably supported by the lower arm, and a locking mechanism for preventing the upper arm from rotating against the lower arm. The locking mechanism has a plurality of pawls, each of which engages with one of the lower arm or the upper arm. A cam rotates to slide the pawls, and a guide portion is formed on the lower or upper arm for guiding the cam to match the rotation center of the cam with the center of the lower and upper arm upon disengagement of the external gears from the internal gear.

Abstract: A powered seat sliding apparatus includes a sliding mechanism having a lower rail and an upper rail being movable in a lengthwise direction relative to the lower rail, a feed screw fixedly supported by the upper rail to be rotated around a rotational axis in the lengthwise direction in response to a rotational force of a motor, a slit train provided at both side portions of the lower rail in the lengthwise direction and being engaged with the feed screw, and a feeding mechanism defined between the feed screw and the slit train so as to slidably move the upper rail relative to the lower rail.

Abstract: A seat reclining device includes a first circular shaped concave portion formed in a first arm and a second concave portion which is concentric with the first concave portion and formed inwardly of the first concave portion. The device also includes an engaged portion which is engaged by an engaging portion. The engaged portion is dividing into two engaged portions in which a first engaged portion is formed on the inner surface of the first concave portion and a second engaged portion is formed on the inner surface of the second concave portion. The engaging portion is divided into two engaging portions such that a first engaging portion is engaged with the first engaged portion and a second engaging portion is engaged with the second engaged portion. All the engaging and engaged portion have gears possessing the same angular piths as each other.

Abstract: A torque transmission device which can rotate an output shaft for transmitting the rotation from the operation side to he device and cannot rotate the output shaft form the device side. The torque transmission device excels in the durability with less wear-out by preventing the generation of the load concentration by the line contact of each component.

Abstract: A reclining mechanism for an automotive seat includes a bracket 23 welded to a side surface of a lower arm 2 and a spiral spring 25 provided around a pair of projections 22, 22 of the bracket 23. One end of the spiral spring 25 is engaged with a pin 26 and the other end thereof is engaged with one of the projections 22, 22 in a play-free arrangement fashion. The bracket 23 is utilized for defining an extent of swinging movement of a manipulating lever 24 and housing a coiled spring 28 for urging the lever 24 in one direction.

Abstract: A seat reclining device has a first arm member adapted to be secured to the seat cushion frame or the seat back frame, a second arm member rotatably supported by the first arm member and adapted to be secured to the other of the seat cushion frame and the seat back frame, and a plurality of pawls for locking an adjusted angle of the seat back. The pawls are disposed on the first arm member and include at least a first pawl and a second pawl. Only one of the first and second pawls is provided with an engaging portion. The second arm member is provided with a receiving portion for preventing the engagement of the outer gear with the inner gear when the engaging portion contacts the receiving portion during relative rotational movement of the first and second arm members.

Abstract: A step-wise seat adjuster for automotive vehicles is made up of a stationary lower guide rail adapted to be mounted to a vehicle floor, and a movable upper guide rail adapted to be mounted to a vehicle seat and capable of lengthwise sliding movement relative to the stationary lower guide rail. Either the stationary lower guide rail or the movable upper guide rail have a lateral side portion in which are formed a plurality of regularly spaced openings. Each of the openings is surrounded by a pair of vertically spaced co-planar surfaces extending in the vertical direction and a pair of parallely spaced surfaces which are opposed with each other in the lengthwise direction. A lock mechanism is adapted to releasably engage one of the plurality of regularly spaced openings to restrict the movement of the movable upper guide rail relative to the stationary lower guide rail.

Abstract: A vertical movement apparatus for a vehicle seat includes a first bracket adapted to be secured on a floor side member, a second bracket arranged to be adjustable relative to the first bracket, a sector gear disposed between the first bracket and the second bracket, and a braking mechanism having a pinion gear that meshes with the sector gear. The first bracket and the second bracket are pivotally connected to each other and the sector gear is pivotally connected to the second bracket and engages the first bracket via a slide member secured on the sector gear.

Abstract: A seat slide apparatus includes an upper rail smoothly slidable relative to a lower rail without using any balls. A part of the convex portion of the lower rail made of lightweight metal alloy material contacts the flange portions of the steel-made upper rail with an elastic spring force.

Abstract: A seat frame for supporting a pad formed in a predetermined shape and engaging with a skin for covering the pad includes a first roll formed frame having a closed rectangular cross sectional shape and wholly formed so as to extend along a front edge and both side edges of the pad and a second roll formed frame having a closed rectangular cross sectional shape and wholly formed so as to extend along a rear edge of the pad. Both end portions of the first roll formed frame and both end portions of the second roll formed frame are connected to each other. Accordingly, the strength of the seat frame is improved without increasing the weight of the seat frame.

Abstract: A seat reclining device for a vehicle includes a lower arm, an upper arm rotatably supported by the lower arm, and a locking mechanism for preventing the upper arm from rotating against the lower arm. The locking mechanism has a plurality of pawls, each of which engages with one of the lower arm or the upper arm. A cam rotates to slide the pawls, and a guide portion is formed on the lower or upper arm for guiding the cam to match the rotation center of the cam with the center of the lower and upper arm upon disengagement of the external gears from the internal gear.

Abstract: To provide a smaller sized seat reclining apparatus, the seat reclining apparatus includes an outer gear portion, a first engaging portion which is formed at a pawl and which is capable of being engaged with a mesh regulation portion, a second engaging portion which is formed at the pawl and which is capable of being engaged with the urging member, and an associating portion which is formed at the pawl and which transmits rotation of the urging member to the pawl to slide when engaged with the urging member. The outer gear portion, the first engaging portion, the second engaging portion, and the associating portion are arranged in such an order along the radially inward direction of the pawl.

Abstract: A seat recliner for a vehicle includes a lower arm adapted to be fixed to a seat cushion, an upper arm adapted to be fixed to a seat back and rotatably supported by the lower arm, a pawl slidably supported by the lower arm, an inner gear portion formed at the upper arm for engagement by the pawl, and a pressure member rotatably supported by the lower arm to urge the pawl into engagement with the inner gear portion. The back surface of the pawl includes a projecting portion for engaging the pressure member, and the pressure member includes a cam surface for engaging the projecting portion. First and second contact portions are formed on opposite sides of the cam surface for being contacted by the back surface of the pawl upon application of an excessive force to the upper arm which causes the pawl to be inclined.

Abstract: A seat slide apparatus includes an upper rail smoothly slidable relative to a lower rail without using any balls. A part of the convex portion of the lower rail made of lightweight metal alloy material contacts the flange portions of the steel-made upper rail with an elastic spring force.

Abstract: A vertical movement apparatus for a vehicle seat includes a first bracket adapted to be secured on a floor side member, a second bracket arranged to be adjustable relative to the first bracket, a sector gear disposed between the first bracket and the second bracket, and a braking mechanism having a pinion gear that meshes with the sector gear. The first bracket and the second bracket are pivotally connected to each other and the sector gear is pivotally connected to the second bracket and engages the first bracket via a slide member secured on the sector gear.

Abstract: To be able to firmly fix a seat to a floor when the seat is elevated relative to the floor, a pair of hooks are installed at a hook portion of a base member and the two hooks are made engageable to a pair of strikers on the floor.

Abstract: The invention provides a seat frame supporting a pad formed in a predetermined shape and engaging with a skin for covering the pad. It comprises a first roll formed frame having a closed rectangular cross sectional shape and wholly formed so as to extend along a front edge and both side edges of the pad and a second roll formed frame having a closed rectangular cross sectional shape and wholly formed so as to extend along a rear edge of the pad, in which both end portions of the first roll formed frame and both end portions of the second roll formed frame are connected to each other. Accordingly, a strength of the seat frame can be improved without increasing a weight.