Ikeda Bussan Co. Ltd.

Johnson Controls Automotive Systems Corporation

Tomonori Yoshida

Moriyuki Eguchi

Ryo Fujimoto

Noriyuki Ikeda

Nobuyuki Nakano

Roller receiving step portions ( ) are formed in both sides of a bottom portion of a main body portion ( ) in a lower rail ( ). A roller ( ) is inserted between the step portions ( ) in the lower rail ( ) and an upper wall ( ) in an upper rail ( ). Left and right roller portions ( A, B) are formed so as to be separated into left and right sections in a substantially center portion of the roller ( ). An elastic washer ( ) corresponding to an elastic body is inserted to a roller shaft ( ) at the separated position of the roller ( ). Taper surfaces ( ) are formed in both side portions ( ) of the roller ( ) and are mounted on taper surfaces ( ) formed in the step portions ( ) in the lower rail ( ) and downward inclined toward a center in a width direction.

Seat slide apparatus

An engaging and sliding portion ( ) having a substantially inverted-U cross sectional shape is formed in a lower base ( ). An upper base ( ) is arranged via an engaging and sliding portion ( ) of the lower base ( ) and a first rolling member ( ). A sliding portion ( ) having a substantially U cross sectional shape and engaging with the engaging and sliding portion ( ) is formed in a holding member ( ). A second rolling member ( ) is provided between the sliding portion ( ) of the holder ( ) and the engaging and sliding portion ( ) of the lower base ( ). A recess ( ) is formed at a position of an adhered portion of the holder ( ) in the upper base ( ). A position of an adhered portion in a seat main body is formed in a substantially linear shape. A mounting portion ( ) having a substantially inverted-U cross sectional shape is formed in the holder ( ). A rotating lever ( ) having a lock hook ( ) inserted to a lock hole ( ) of the lower base ( ) is pivoted to the upper base ( ). Lever guides ( ) for guiding.

Rotating and adjusting mechanism of seat for vehicle

A vehicle seat slide device includes an elongated lower guide rail adapted to be secured to a floor panel of the vehicle body in its longitudinal direction, and an upper slide rail slidably fitted into the lower guide rail. The lower guide rail has a rail body, side walls, slider rest portions and upper guide walls inwardly extending from upper ends of the side walls to define an elongated guide groove. First hook segments are formed on inner edges of the upper guide walls along the elongated guide groove, and second hook segments are formed on the side walls of the lower guide rail, respectively. The upper slide rail includes a slide body, vertical wall, upper slide walls, and lower side walls. In the upper slide rail, slider rest shoulders, first engaging segments, and second engaging segments are also formed. Either one of the slider rest portions may include a rectilinear portion by which one of the sliders is held in point of contact.

Vehicle seat slide device

First hook portions ( ) are formed at front end portions in a side of an opening portion ( ) of a main body portion ( ) in a long lower rail ( ), and second hook portions ( ) are formed in lower portions of both side portions ( ) in the main body portion ( ). First engagement portions ( ) engaged with the first hook portions ( ) in the long lower rail ( ) are formed in upper walls ( ) in an upper rail ( ). Projection portions ( ) are formed in the first engagement portions ( ) so as to protrude to the side of the first hook portions ( ). Second engagement portions ( ) engaged with the second hook portions ( ) in the long lower rail ( ) are formed in front end sides of both side portions ( ) of the main body portion ( ) in the upper rail ( ).

A seat for vehicle includes a base member secured to a seat cushion; a rotating arm rotatably supported by the base member through a reclining mechanism; a seat back tiltable with respect to the seat cushion; a center-folding mechanism rotatably supported on the rotating side of the rotating arm; and an arm plate secured to each frame on both sides of the seat back. A second interlocking cam is capable of advancing or retreating into the base member side by a first interlocking cam secured to the arm plate. The base member is provided with a cut-away portion at a predetermined point for containing an engaging portion provided on the tip of the second interlocking cam and for enabling the first and second interlocking cams to act in cooperation, only when the rotating arm is positioned at a predetermined tilt angle.

Seat for vehicle

A seat reclining device comprises a first plate secured to a rear part of a seat cushion and a second plate secured to a seatback. The first and second plates have first and second circulate openings. A drive shaft passes through the first and second circular openings. A lock mechanism is actuated by the drive shaft. The lock mechanism is interposed between the first and second plates to lock the second plate at a desired angular position relative to the first plate when the drive shaft is turned in a first direction and cancel the locked condition of the second plate when the drive shaft is turned in a second direction. A coil spring is disposed about the drive shaft and neatly put in the first circular opening. The coil spring is incorporated with the lock mechanism in such a manner as to bias the lock mechanism to is assume the locked condition of the second plate.

Seat reclining device

A double-sided reclining apparatus comprises outside and inside reclining devices, each comprising a base and an arm having an inner toothed portion, a pivotal shaft through which the arm is rotatably supported on the base, and a set of cam and toothed block in cam-connection. The cam and the toothed block cooperate with each other to cause meshing/unmeshing action of the reclining apparatus. The cam has a locking-action cam-profile surface portion and an unlocking-action cam-profile surface portion, whereas the toothed block has a locking-action cam-contour surface portion and an unlocking-action cam-contour surface respectively brought into cam-connection with the locking-action cam-profile surface portion and the unlocking-action cam-profile surface portion. In the locked state, the relative distance between the unlocking-action cam-profile surface portion and the unlocking-action cam-contour surface portion included in the inside reclining device is shorter than the relative distance between the unlocking-action cam-profile surface portion and the unlocking-action cam-contour surface portion included in the outside reclining device, for providing a mechanical phase-lead of the inside reclining device with respect to the outside reclining device.

Double-sided reclining apparatus

A double-sided reclining apparatus comprises a first reclining device equipped with a reclining-lever handle and a second reclining device, each comprising a base and an arm having an inner toothed portion, a pivotal shaft through which the arm is rotatably supported on the base, and a set of cam and toothed block in cam-connection. The toothed block has a second toothed portion meshable with and unmeshable from the first toothed portion. The cam and the toothed block cooperate with each other to cause meshing/unmeshing action of the reclining apparatus. The cam and the toothed block have a plurality of cam-connection points in the cam-profile surface of the cam and the cam-contour surface of the toothed block. The pivotal shaft is fitted into a central slot of the cam and has a noncircular irregular-shaped cross section to drive the cam. A predetermined clearance is provided all around between the inner periphery of the central slot of the cam and the outer periphery of the pivotal shaft.

Each of a base member and a rotational arm is circular. A ring member is fixed to a peripheral edge of the base member. A peripheral edge of the rotational arm is covered by the ring member and one end of a return spring is engaged with a hook portion formed in the ring member. The other end of the return spring is engaged with fixing members such as bolts, nuts and rivets and so on. A peripheral edge of the nuts as the fastening members is formed in a guide portion for the return spring.

Vehicle seat

A power seat slide device for a motor vehicle comprises a rail unit including a stationary rail mounted to a vehicle floor and a movable rail slidably engaged with the stationary rail. The movable rail carries thereon a seat. A twin gear member is rotatably held by the movable rail. The twin gear member includes a worm gear and a first crossed helical gear. An elongate counterpart structure for the worm gear is possessed by the stationary rail. The counterpart structure extends along the stationary rail and is meshedly engaged with the worm gear, so that rotation of the twin gear member about its axis induces a straight-line movement of the movable rail relative to the stationary rail. An electric motor is held by the movable rail. A speed reduction gear unit is held by the movable rail. The speed reduction gear unit is arranged between the electric motor and the first crossed helical member in such a manner that the twin gear member is rotated by the electric motor through the speed reduction gear unit.

Power seat slide device for motor vehicle

A rotary-cam type reclining device comprises a base fixedly connected to a seat cushion, a toothed arm fixedly connected to a seat back and rotatably supported on the base via a pivot, a toothed block slidably disposed between the base and the arm and having an outer toothed portion and a cam-contour surface and slidably guided by two parallel side walls of a recessed toothed-block guide defined in the base, a rotary cam for producing outward and inward sliding motions of the toothed block to mesh and unmesh the outer toothed portion of the toothed block with and from the inner toothed portion of the arm by a rotary motion of the cam, and an operating lever mechanically linked to the cam for producing the rotary motion of the cam. Also provided between the arm and the toothed block is an auxiliary interlocking member, which is responsive to a deformation of the toothed block resulting from impact force applied to the arm for interlocking the device.

Rotary-cam type reclining device

A rotary-cam type reclining device comprises a base fixedly connected to a seat cushion, a toothed arm fixedly connected to a seat back and rotatably supported on the base via a pivot, a toothed block slidably disposed between the base and the arm and having an outer toothed portion and a cam-contour surface and slidably guided by two parallel side walls of a recessed toothed-block guide defined in the base, a rotary cam for producing outward and inward sliding motions of the toothed block to mesh and unmesh the outer toothed portion of the toothed block with and from the inner toothed portion of the arm by a rotary motion of the cam, and an operating lever mechanically linked to the cam for producing the rotary motion of the cam. In a completely-locked state of the device, the toothed block is held at its outermost meshing position by way of three cam-connection points created between the cam-profile surface of the cam and the cam-contour surface of the toothed block for restricting or preventing the movement of the toothed block in all directions of the toothed block.

A reclining device comprises a stationary base fixedly connected to a seat cushion, a pivotal, press-worked arm fixedly connected to a seat back and rotatably supported on the base and having an inner toothed portion, at least one toothed block slidably disposed between the base and the arm and having an outer toothed portion meshable with the inner toothed portion, and a rotary cam in cam-connection with the toothed block for producing an outward or inward sliding motion of the toothed block to mesh or unmesh the outer toothed portion with or from the inner toothed portion by rotation of the cam. To balance two contradictory requirements, that is reduction of undue sink mark (lack of fill) and high mechanical strength (high durability), a reinforced portion of a lack-of-fill suppressive geometry and shape, being composed of at least two outside curved faces, is integrally formed with the arm all around the circumferentially-extending stepped portion on an arm outside face opposed to an arm inside face formed with the inner toothed portion.

A reclining device for a seat comprises first and second side reclining mechanisms which are substantially the same in construction and mounted to respective sides of the seat to allow a seat back to be locked at a desired angular position relative to a seat cushion. A connecting rod extends between the first and second side reclining mechanisms. The connecting rod induces a locked condition of the seat back when turned in a first direction about an axis thereof and induces an unlocked condition of the seat back when turned in a second direction about the axis. A control lever is connected to one end of the connecting rod to pivot therewith. A projection is formed on the connecting rod in a manner to project in a direction perpendicular to the axis of the connecting rod.

Growing community of inventors

Yokohama, Japan

Tomonori Yoshida