Abstract: A vehicle seat reclining device includes first and second brackets, which are rotational relative to each other, two guide portions provided on the first bracket and forming a guide groove, a pawl, and a protruding portion. The pawl has outer teeth, which can engage with and disengage from inner teeth of the second bracket, and is guided by the guide groove to move radially. The protruding portion protrudes circumferentially at least at the tip end portion of the guide portion. A fulcrum of inclination of the pawl with respect to the guide part may occur at the time when the outer teeth and the inner teeth are disengaged from each other. The fulcrum located at a position closer to the inner teeth than an intersection point between the guide portion and a normal to a surface where the outer teeth and the inner teeth are engaged with each other.

Abstract: A vehicle seat reclining device is provided with a first bracket having internal teeth, a plurality of pawls each having external teeth capable of engaging with and disengaging from the internal teeth, a second bracket having a guide portion that movably holds the pawls in a radial direction, and a cam mechanism, which moves each pawl in the radial direction. Among the external teeth in each pawl, at least one external tooth including an end tooth located at one end in the circumferential direction of the pawl is displaced inward in the radial direction with respect to a reference position corresponding to the pitch circle of the internal teeth along a center line that divides the external tooth into two parts in the circumferential direction without changing the shape of an effective engagement portion for the internal tooth and the pitch circle radius of the external tooth.

Abstract: A seat slide apparatus for a vehicle includes a second unlock mechanism rotating an unlock lever in a direction that unlocks a lock mechanism by pushing the unlock lever in accordance with a predetermined seat operation, an unlocked state retaining lever retaining the lock mechanism in an unlocked state cooperating with the second unlock mechanism by operating in conjunction with the second unlock mechanism, a first unlocked state release mechanism moving the unlocked state retaining lever to a position where the lock mechanism is released from the unlocked state by making contact with an operation body in accordance with movement of an upper rail relative to an lower rail, and a second unlocked state release mechanism moving the unlocked state retaining lever to a position where the lock mechanism is released from the unlocked state by pushing the unlocked state retaining lever in accordance with the operational input.

Abstract: Provided is a vehicle seat reclining apparatus comprising: a first bracket, a second bracket, a pole, a cam, a locking urging member, a hinge pin, a fitting hole, a release lever, and a supporting urging member.

Abstract: A seat slide apparatus for a vehicle includes a first rail, a second rail, a lock member, a biasing member, the lock member being rotatably connected to the second rail in a state where a support shaft fixed to one of the second rail and the lock member is positioned within an elongated hole formed at the other of the second rail and the lock member to be movable in first and second directions of the relative movement and is biased by a support shaft biasing member in a direction orthogonal to the first and second directions, and a restriction portion restricting the support shaft from moving within the elongated hole in the first and second directions in a case where a load applied in one of the first and second directions is smaller than a predetermined value.

Abstract: Provided is a vehicle seat sliding apparatus including a lower rail, an upper rail to the lower rail, a locking mechanism, unlocking mechanism, an unlocked-state maintaining lever, and an unlocked-state releasing lever, in which the unlocked-state releasing lever includes a rotational operating portion configured to rotate in a first direction and to be capable of coming into contact with an operating member in the direction of the relative movement of the upper rail, and the unlocked-state releasing lever is configured to press and move the unlocked-state maintaining lever in the direction of releasing the maintenance of the unlocked state and is capable of rotating in the first direction is disabled without moving the unlocked-state maintaining lever from the maintaining position.

Abstract: A vehicle seat reclining device includes first and second brackets, which are rotational relative to each other, two guide portions provided on the first bracket and forming a guide groove, a pawl, and a protruding portion. The pawl has outer teeth, which can engage with and disengage from inner teeth of the second bracket, and is guided by the guide groove to move radially. The protruding portion protrudes circumferentially at least at the tip end portion of the guide portion. A fulcrum of inclination of the pawl with respect to the guide part may occur at the time when the outer teeth and the inner teeth are disengaged from each other. The fulcrum located at a position closer to the inner teeth than an intersection point between the guide portion and a normal to a surface where the outer teeth and the inner teeth are engaged with each other.

Abstract: A vehicle seat sliding apparatus includes: a first rail fixed to one of a vehicle floor and a seat and having first vertical wall portions, a first connection wall portion, and flanges; and a second rail fixed to the other one of the vehicle floor and the seat and having second vertical wall portions, a second connection wall portion, outward extending wall portions, and extending wall portions, wherein locking claws are aligned side by side at tip ends of the flanges of the first rail; the second rail is provided with through-holes; the vehicle seat sliding apparatus further includes, a locking member having locking portions, and a biasing member; and the outward extending wall portions are provided with flat portions.

Abstract: A vehicle seat sliding apparatus includes: a first rail fixed to one of a vehicle floor and a seat and having first vertical wall portions, a first connection wall portion connecting base ends of the first vertical wall portions, and flanges; a second rail fixed to the other one of the vehicle floor and the seat and having second vertical wall portions, a second connection wall portion connecting base ends of the second vertical wall portions, outward extending wall portions, and extending wall portions; balls interposed in a rollable manner between second ball guides provided to the outward extending wall portions in inner portions in the width direction and first ball guides provided to the first connection wall portion; and an attaching portion disposed at a tip end of the first connection wall portion.

Abstract: A vehicle seat reclining device is provided with a first bracket having internal teeth, a plurality of pawls each having external teeth capable of engaging with and disengaging from the internal teeth, a second bracket having a guide portion that movably holds the pawls in a radial direction, and a cam mechanism, which moves each pawl in the radial direction. Among the external teeth in each pawl, at least one external tooth including an end tooth located at one end in the circumferential direction of the pawl is displaced inward in the radial direction with respect to a reference position corresponding to the pitch circle of the internal teeth along a center line that divides the external tooth into two parts in the circumferential direction without changing the shape of an effective engagement portion for the internal tooth and the pitch circle radius of the external tooth.

Abstract: A seat slide apparatus for a vehicle includes a first rail, a second rail, a lock member, a biasing member, the lock member being rotatably connected to the second rail in a state where a support shaft fixed to one of the second rail and the lock member is positioned within an elongated hole formed at the other of the second rail and the lock member to be movable in first and second directions of the relative movement and is biased by a support shaft biasing member in a direction orthogonal to the first and second directions, and a restriction portion restricting the support shaft from moving within the elongated hole in the first and second directions in a case where a load applied in one of the first and second directions is smaller than a predetermined value.

Abstract: A seat reclining apparatus for a vehicle, includes a first arm, a second arm rotatably supported by the first arm, a pawl including external teeth engageable with internal teeth, a cam portion and plural pawl-side cam surfaces arranged at the cam portion, a cam including a cam surface engaging with the cam portion formed at the pawl, and a biasing member biasing the cam to rotate and causing the cam surface to press the cam portion in a radial direction. The plural pawl-side cam surfaces or the cam surface is configured in a manner that the plural pawl-side cam surfaces and the cam surface are in contact with each other when the external teeth and the internal teeth are in an engaged state and in a manner that clearances generated between each of the plural pawl-side cam surfaces and the cam surface in the radial direction are all uniform.

Abstract: A seat slide apparatus for a vehicle includes a second unlock mechanism rotating an unlock lever in a direction that unlocks a lock mechanism by pushing the unlock lever in accordance with a predetermined seat operation, an unlocked state retaining lever retaining the lock mechanism in an unlocked state cooperating with the second unlock mechanism by operating in conjunction with the second unlock mechanism, a first unlocked state release mechanism moving the unlocked state retaining lever to a position where the lock mechanism is released from the unlocked state by making contact with an operation body in accordance with movement of an upper rail relative to an lower rail, and a second unlocked state release mechanism moving the unlocked state retaining lever to a position where the lock mechanism is released from the unlocked state by pushing the unlocked state retaining lever in accordance with the operational input.

Abstract: The seat lifter device for a vehicle includes a lock/unlock device which is formed with an engagement/disengagement mechanism to produce a lock condition in which the relative rotation between a first rotation member and a second rotation member is restricted and an unlock condition in which the relative rotation therebetween is allowed by the engagement/disengagement operation of the engagement/disengagement mechanism such that a detent member movably supported on the first rotation member fixed to the base frame side engages with or disengages from the second rotation member fixed to the rear link member. This seat lifter device can firmly hold the seat lifted position even when an exterior force generated upon a vehicle collision is applied to the engagement/disengagement mechanism through the rear link member.

Abstract: The seat lifter device for a vehicle includes a lock/unlock device which is formed with an engagement/disengagement mechanism to produce a lock condition in which the relative rotation between a first rotation member and a second rotation member is restricted and an unlock condition in which the relative rotation therebetween is allowed by the engagement/disengagement operation of the engagement/disengagement mechanism such that a detent member movably supported on the first rotation member fixed to the base frame side engages with or disengages from the second rotation member fixed to the rear link member. This seat lifter device can firmly hold the seat lifted position even when an exterior force generated upon a vehicle collision is applied to the engagement/disengagement mechanism through the rear link member.

Abstract: A seat reclining apparatus for a vehicle, includes a first arm, a second arm rotatably supported by the first arm, a pawl including external teeth engageable with internal teeth, a cam portion and plural pawl-side cam surfaces arranged at the cam portion, a cam including a cam surface engaging with the cam portion formed at the pawl, and a biasing member biasing the cam to rotate and causing the cam surface to press the cam portion in a radial direction. The plural pawl-side cam surfaces or the cam surface is configured in a manner that the plural pawl-side cam surfaces and the cam surface are in contact with each other when the external teeth and the internal teeth are in an engaged state and in a manner that clearances generated between each of the plural pawl-side cam surfaces and the cam surface in the radial direction are all uniform.

Abstract: A seat reclining apparatus includes a fine angle adjustment mechanism for finely adjusting an angle between a seat cushion and a seat back of a seat and including a planetary gear mechanism having a first gear provided to a seat cushion side of the seat for relative rotation with the seat cushion and a second gear fixed to a seat back side of the seat and an engaging/disengaging mechanism for controlling the relative rotation between the seat cushion and the seat back of the seat and including a base plate fixed to the seat cushion side and a stopper member provided to the base plate and engageable with or disengageable from the first gear. The relative rotation of the first gear with respect to the seat cushion is restricted when the stopper member engages with the first gear and the relative rotation of the first gear to the seat cushion is allowed when the stopper member disengages from the first gear.

Abstract: A seat apparatus include: a shaft rotated by a motor and operatively associated with the seat so as to move the seat; a first leg secured to the shaft and pivotably supported by the seat; a first spring, one end of which is fixedly attached to the shaft and an other end of which is fixedly attached to the seat; the first spring which biases the shift in a first direction; and a second spring, one end of which is fixedly attached to the shaft and an other end of which is fixedly attached to the seat, the second spring which biases the shaft in a second direction. The first direction opposes to the second direction.

Abstract: A seat assembly for a vehicle includes a seatback, a seat cushion, a link mechanism for supporting the seat cushion, and a drive unit for driving the link mechanism and moving the seat cushion between a seating position and a stowed position. When the seat cushion is moved between the seating position and the stowed position, the seat cushion and the seatback keep a constant posture by an operation of the link mechanism and the drive unit.

Abstract: A seat reclining apparatus includes a fine angle adjustment mechanism for finely adjusting an angle between a seat cushion and a seat back of a seat and including a planetary gear mechanism having a first gear provided to a seat cushion side of the seat for relative rotation with the seat cushion and a second gear fixed to a seat back side of the seat and an engaging/disengaging mechanism for controlling the relative rotation between the seat cushion and the seat back of the seat and including a base plate fixed to the seat cushion side and a stopper member provided to the base plate and engageable with or disengageable from the first gear. The relative rotation of the first gear with respect to the seat cushion is restricted when the stopper member engages with the first gear and the relative rotation of the first gear to the seat cushion is allowed when the stopper member disengages from the first gear.