Abstract: A switching mechanism of a vehicle seat includes a base element, an output arm pivotally connected to the base element via a first pivot shaft, an input arm having a force input point and pivotally connected to the output arm via a second pivot shaft as a rotational center, and an input arm biasing member. When a force is applied to the input arm, the input arm can be rotated around the first pivot shaft in the normal rotational direction while contacting the first pivot shaft, so that the second pivot shaft can pivot about the first pivot shaft, thereby rotating the output arm about the first pivot shaft with the input arm to rotate the seat back from a seating position into one of a walk in position and a folded position. The input arm may also be configured to rotate the seat back to the seating position.

Abstract: One aspect of the present invention can include a vehicular seat including a seat cushion, a seat back inclinably attached to the seat cushion, and a restricting falling down mechanism. The restricting falling down mechanism restricts the seat back from falling down forward when the seat back falls down from a substantially erected state so that the seat back is maintained in a forward inclining attitude. The restricting falling down mechanism comprises an interference lever pivotably attached to the seat cushion. When the seat back falls down forward from the substantially erected state, the interference lever is squeezed between a member on a side of the seat back and a member on a side of the seat cushion. And the seat back is restricted from falling down forward by the member on the side of the seat cushion via the interference lever.

Abstract: Each of the pawls that are capable of rotationally locking a reclining device has a hardness greater than a slide cam that is capable of pressing the pawls to engage a ratchet. When a large load capable of forcibly rotationally displacing the ratchet is applied thereto while the pawls mesh with the ratchet, the pawls are pressed by the ratchet in a radially inward direction in which the pawls are disengaged therefrom, so as to press the slide cam with an increased buckling strength and plastically deform the same.

Abstract: When a tilt-down function is performed, a rotationally-preventing condition of a reclining device connecting a base member and an intermediate member is released, so that a seat back is tiltably rotated forwardly integrally with the intermediate member and a seat cushion is pushed by a boomerang link capable of moving with the intermediate member so as to be sunk downwardly while tiltably rotating a front link. However, when a walk-in function is performed, a rotationally-preventing condition of a memory device connecting the seat back and the intermediate member is released, so that the seat back can be tiltably rotated to a forwardly inclined position independently of the intermediate member that is maintained in a condition in which the intermediate member is integrated with the base member.

Abstract: One aspect of the present invention can include a vehicular seat including a seat cushion, a seat back inclinably attached to the seat cushion, and a restricting falling down mechanism. The restricting falling down mechanism restricts the seat back from falling down forward when the seat back falls down from a substantially erected state so that the seat back is maintained in a forward inclining attitude. The restricting falling down mechanism comprises an interference lever pivotably attached to the seat cushion. When the seat back falls down forward from the substantially erected state, the interference lever is squeezed between a member on a side of the seat back and a member on a side of the seat cushion. And the seat back is restricted from falling down forward by the member on the side of the seat cushion via the interference lever.

Abstract: A switching mechanism of a vehicle seat includes a base element, an output arm pivotally connected to the base element via a second pivot shaft, an input arm having a force input point and pivotally connected to the output arm via a first pivot shaft as a rotational center, and an input arm biasing member. The input arm biasing member normally biases the input arm in a normal rotational direction, so that the input arm can contact the second pivot shaft at a middle portion between the force input point and the rotational center. When a normal directional input force is applied to the input arm, the input arm can be rotated around the second pivot shaft in the normal rotational direction while contacting the second pivot shaft, so that the first pivot shaft can pivot about the second pivot shaft, thereby rotating the output arm about the second pivot shaft with the input arm.