Reclining device for a seat

A reclining device comprising: a plurality of pawls having first teeth; a ratchet having second teeth that mesh with the first teeth; a holder that holds the pawls such that the first teeth of the pawls can move selectively toward and away from the second teeth of the ratchet, wherein the ratchet is rotated concentrically with respect to the holder; a cam body that moves the pawls toward the ratchet and brings the pawls into mesh with the ratchet so as to prevent the holder and the ratchet from rotating relative to each other; and an unlock member that holds at least one of the pawls while the holder and the ratchet form a relative rotational angle within a predetermined range and that brings the at least one of the pawls out of mesh with the ratchet, wherein the cam body is urged to rotate for moving the pawls toward the ratchet, and when at least one of the pawls is disengaged from the ratchet by the unlock member, the pawl moves back causing the cam body to stop rotating against an urging force; and wherein the sum of the angles to be set to bring the pawls into mesh and the angles to be set to bring the pawls out of mesh exceeds 360.

A reclining device comprising: a plurality of pawls having outer teeth; a ratchet having on an inner peripheral side thereof inner teeth that mesh with the outer teeth; a holder that holds the pawls such that the pawls can move selectively toward and away from the inner teeth of the ratchet, wherein the ratchet is rotated concentrically with respect to the holder; a cam body that moves the pawls toward the ratchet and brings the pawls into mesh with the ratchet to prevent the holder and the ratchet from rotating relative to each other; and an unlock member that holds at least one of the pawls that has moved away from the ratchet while the holder and the ratchet form a relative rotational angle within a predetermined range and that sets a first angular range where the at least one of the pawls is out of mesh with the ratchet, and a second angular range where the pawls adjacent to the at least one of the pawls are to move so as to mesh with the ratchet such that the first and second angular ranges overlap with each other in a plan view.

A reclining device comprising: a plurality of pawls having outer teeth; a ratchet having on an inner peripheral side thereof inner teeth that mesh with the outer teeth; a holder that holds the pawls such that the pawls can move selectively toward and away from the inner teeth of the ratchet, wherein the ratchet is rotated concentrically with respect to the holder; a cam body that moves the pawls toward the ratchet and brings the pawls into mesh with the ratchet to prevent the holder and the ratchet from rotating relative to each other; and an unlock member that holds at least one of the pawls that has moved away from the ratchet while the holder and the ratchet form a relative rotational angle within a predetermined range and the unlock member is provided for an amount of the pawls less than a total number of the pawls, wherein the cam body is urged to rotate for moving the pawls toward the ratchet, and when at least one of the pawls is disengaged from the ratchet by the unlock member, the pawl moves back causing the cam body to stop rotating against an urging force.

A reclining device comprising: a first disk member that is attached to a frame structure of one of a seat cushion and a seat back of the vehicle seat; a second disk member that is attached to a frame structure of the other of the seat cushion and the seat back, the second disk member being coupled with the first disk member for relative rotation and united with the first disk member and having an internal circular ratchet portion concentric therewith; a plurality of pawls slidably coupled within the first disk member in a radial direction to be moved toward and away from the ratchet portion of the second disk member, a cam body pivotally coupled within the first disk member to engage the pawls with the ratchet portion of the second disk member; and an unlock member that holds at least one of the pawls that has moved away from the ratchet portion of the second disk member while the first disk member and the second disk member form a relative rotational angle within a predetermined range and the unlock member is provided for an amount of the pawls less than a total number of the pawls, wherein the cam body is urged to rotate for moving the pawls toward the ratchet, and when at least one of the pawls is disengaged from the ratchet by the unlock member, the pawl moves back causing the cam body to stop rotating against an urging force.

A reclining device comprising: a first disk member that is attached to a frame structure of one of a seat cushion and a seat back of the vehicle seat; a second disk member that is attached to a frame structure of the other of the seat cushion and the seat back, the second disk member being coupled with the first disk member for relative rotation and united with the first disk member and having an internal circular ratchet portion concentric therewith; a plurality of pawls slidably coupled within the first disk member in a radial direction to be moved toward and away from the ratchet portion of the second disk member, a cam body pivotally coupled within the first disk member to engage the pawls with the ratchet portion of the second disk member; and an unlock member that holds at least one of the pawls that has moved away from the ratchet portion of the second disk member while the first disk member and the second disk member form a relative rotational angle within a predetermined range and that sets a first angular range where the at least one of the pawls is out of mesh with the ratchet portion of the second disk member, and a second angular range where the pawls adjacent to the at least one of the pawls are to move so as to mesh with the ratchet portion of the second disk member such that the first and second angular ranges overlap with each other in a plan view, wherein the cam body is urged to rotate for moving the pawls toward the ratchet, and when at least one of the pawls is disengaged from the ratchet by the unlock member, the pawl moves back causing the cam body to stop rotating against an urging force.

A reclining device comprising: a plurality of pawls having first teeth; a ratchet having on an entire inner peripheral side thereof second teeth that mesh with the first teeth; a holder that rotates concentrically with respect to the ratchet and that holds the pawls such that the pawls can move selectively toward and away from the second teeth of the ratchet; a cam body that moves the pawls toward the ratchet and brings the pawls into mesh with the ratchet to prevent the holder and the ratchet from rotating relative to each other; and an unlock member that holds at least one of the pawls that has moved away from the second teeth of the ratchet while the holder and the ratchet form a relative rotational angle within a predetermined range wherein the cam body is urged to rotate for moving the pawls toward the ratchet, and when at least one of the pawls is disengaged from the ratchet by the unlock member, the pawl moves back causing the cam body to stop rotating against an urging force.