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A seat adjustment apparatus for a vehicle includes a first bracket, a second bracket defining an accommodating void with the first bracket, a pawl, and a pawl reverse spring, The pawl includes a ratchet portion, a pawl side reverse wall portion, and a pawl side return wall portion, the ratchet porti

A seat adjustment apparatus for a vehicle includes a first bracket, a second bracket defining an accommodating void with the first bracket, a pawl, and a pawl reverse spring, The pawl includes a ratchet portion, a pawl side reverse wall portion, and a pawl side return wall portion, the ratchet portion allowing a relative rotation of the first and second brackets in a first direction and prohibiting a relative rotation of the first and second brackets in a second direction in a case where the pawl is biased to rotate in a normal direction, the pawl side reverse wall portion allowing the relative rotation in the second direction so that the pawl is reversed by being biased to rotate in a reverse direction, the pawl side return wall portion bringing the pawl to be returned by being biased to rotate in the normal direction.

대표청구항 ▼

1. A seat adjustment apparatus for a vehicle, comprising: a first bracket integrally including a ratchet inner teeth portion, a bracket side reverse wall portion, and a bracket side return wall portion;a second bracket pivotally supported by the first bracket to define an accommodating void with the

1. A seat adjustment apparatus for a vehicle, comprising: a first bracket integrally including a ratchet inner teeth portion, a bracket side reverse wall portion, and a bracket side return wall portion;a second bracket pivotally supported by the first bracket to define an accommodating void with the first bracket, the second bracket adjusting a posture of a seat for a vehicle by rotating relative to the first bracket;a holding member inhibiting the first bracket and the second bracket from moving in a rotational axial direction of the second bracket;a pawl supported by the second bracket within the accommodating void and being pivotable about an axis in parallel with the rotational axial direction of the second bracket; anda pawl reverse spring including a first end portion engaging with the second bracket and a second end portion engaging with the pawl within the accommodating void,the pawl integrally including a ratchet portion, a pawl side reverse wall portion, and a pawl side return wall portion, the ratchet portion allowing a relative rotation of the first bracket and the second bracket in a first direction and prohibiting a relative rotation of the first bracket and the second bracket in a second direction opposite from the first direction by engaging with the ratchet inner teeth portion in a case where the pawl is biased to rotate in a normal direction by the pawl reverse spring, the pawl side reverse wall portion allowing the relative rotation of the first bracket and the second bracket in the second direction by making contact with the bracket side reverse wall portion in a case of the relative rotation of the first bracket and the second bracket in the first direction so that the pawl is reversed by being biased to rotate in a reverse direction by the pawl reverse spring, the pawl side return wall portion bringing the pawl to be returned by being biased to rotate in the normal direction by the pawl reverse spring by making contact with the bracket side return wall portion in a case of the relative rotation of the first bracket and the second bracket in the second direction,wherein plural pairs are arranged within the accommodating void so as to be rotationally symmetric, one pair of the plural pairs including the pawl and the pawl reverse spring, andwherein the first bracket includes an idle wall portion allowing the relative rotation of the first bracket and the second bracket by the ratchet portion sliding on the idle wall portion before the pawl is reversed in a case where the pawl is biased to rotate in the normal direction by the pawl reverse spring, a reverse engagement projection formed to project at the idle wall portion and a reverse engagement recess portion formed to be dented at the pawl and to which the reverse engagement projection is fitted in a case where the pawl is reversed. 2. The seat adjustment apparatus according to claim 1, wherein the pawl reverse spring includes a coil portion of which an axial direction extends in parallel with the rotational axial direction of the second bracket. 3. The seat adjustment apparatus according to claim 2, wherein the first bracket includes an approach wall portion on which the ratchet portion slides before the ratchet portion engages with the ratchet inner teeth portion at the time of the relative rotation of the first bracket and the second bracket in the first direction in a case where the pawl is biased to rotate in the normal direction by the pawl reverse spring, a return engagement projection formed to project at the approach wall portion, and a return engagement recess portion formed to be dented at the ratchet portion and to which the return engagement projection is fitted in a case where the pawl is returned. 4. The seat adjustment apparatus according to claim 1 wherein the first bracket includes an approach wall portion on which the ratchet portion slides before the ratchet portion engages with the ratchet inner teeth portion at the time of the relative rotation of the first bracket and the second bracket in the first direction in a case where the pawl is biased to rotate in the normal direction by the pawl reverse spring, a return engagement projection formed to project at the approach wall portion, and a return engagement recess portion formed to be dented at the ratchet portion and to which the return engagement projection is fitted in a case where the pawl is returned. 5. The seat adjustment apparatus according to claim 1, wherein the seat adjustment apparatus is disposed between a seat cushion and an ottoman to hold the ottoman by restricting the relative rotation of the first bracket and the second bracket in the first direction in a case where the ottoman is in a retracted state, to allow the ottoman to operate in a deploying direction by allowing the relative rotation of the first bracket and the second bracket in the first direction and inhibit the ottoman to operate in a retracting direction by restricting the relative rotation of the first bracket and the second bracket in the second direction in an adjusting region to a maximally deployed state of the ottoman, and to allow the ottoman to operate in the retracting direction by allowing the relative rotation of the first bracket and the second bracket in the second direction in a case where the ottoman is further operated in the deploying direction from the maximally deployed state so that the ottoman is returned to the retracted state. 6. The seat adjustment apparatus according to claim 5, further comprising: a hook rotatably connected to one of a first member that is provided at the seat cushion and a second member that is provided at the ottoman, the first member and the second member being arranged between the seat cushion and the ottoman;a striker pin fixed to the other of the first member and the second member and configured to hook the hook in a case where the ottoman is in the retracted state to restrict an operation of the ottoman in the deploying direction; anda contact member provided at the other of the first member and the second member to which the striker pin is fixed,wherein the hook is guided by the striker pin in a case where the ottoman in the retracted state is further operated in the retracting direction to rotate to an unlocked position at which the striker pin is releasable from the hook to allow the operation of the ottoman in the deploying direction, and is guided by the contact member in association with the operation of the ottoman in the deploying direction to rotate to a locked position at which the hook hooks the striker pin in the retracted state of the ottoman, the hook hooking the striker pin in the retracted state of the ottoman in association with the operation of the ottoman in the retracting direction. 7. The seat adjustment apparatus according to claim 6, further comprising a reverse spring biasing the hook to rotate to the locked position in the retracted state of the ottoman, biasing the hook to rotate to the unlocked position by being turned over in association with a rotation of the hook that is guided by the striker pin in a case where the ottoman in the retracted state is further operated in the retracting state, and biasing the hook to rotate to the locked position by being turned over in association with the rotation of the hook that is guided by the contact member along with the operation of the ottoman in the deploying direction. 8. The seat adjustment apparatus according to claim 7, wherein the ottoman is supported by the seat cushion via an arm member that is rotatably connected to an attachment member fixed to the seat cushion, the first member including the attachment member while the second member including the arm member. 9. The seat adjustment apparatus according to claim 7, further comprising an engagement member provided at one of the first member and the second member, and a biasing member provided at the other of the first member and the second member, the biasing member including a first leg portion engaging with one of the first member and the second member and a second leg portion contacting or being close to the engagement member in the retracted state of the ottoman, the biasing member generating a biasing force to operate the ottoman in the deploying direction in a case where the second leg portion is pressed by the engagement member when the ottoman is further operated in the retracting direction. 10. The seat adjustment apparatus according to claim 6, wherein the ottoman is supported by the seat cushion via an arm member that is rotatably connected to an attachment member fixed to the seat cushion, the first member including the attachment member while the second member including the arm member. 11. The seat adjustment apparatus according to claim 10, further comprising an engagement member provided at one of the first member and the second member, and a biasing member provided at the other of the first member and the second member, the biasing member including a first leg portion engaging with one of the first member and the second member and a second leg portion contacting or being close to the engagement member in the retracted state of the ottoman, the biasing member generating a biasing force to operate the ottoman in the deploying direction in a case where the second leg portion is pressed by the engagement member when the ottoman is further operated in the retracting direction. 12. The seat adjustment apparatus according to claim 6, further comprising an engagement member provided at one of the first member and the second member, and a biasing member provided at the other of the first member and the second member, the biasing member including a first leg portion engaging with one of the first member and the second member and a second leg portion contacting or being close to the engagement member in the retracted state of the ottoman, the biasing member generating a biasing force to operate the ottoman in the deploying direction in a case where the second leg portion is pressed by the engagement member when the ottoman is further operated in the retracting direction. 13. A seat adjustment apparatus for a vehicle, comprising: a first bracket integrally including a ratchet inner teeth portion, a bracket side reverse wall portion, and a bracket side return wall portion;a second bracket pivotally supported by the first bracket to define an accommodating void with the first bracket, the second bracket adjusting a posture of a seat for a vehicle by rotating relative to the first bracket;a holding member inhibiting the first bracket and the second bracket from moving in a rotational axial direction of the second bracket;a pawl supported by the second bracket within the accommodating void and being pivotable about an axis in parallel with the rotational axial direction of the second bracket; anda pawl reverse spring including a first end portion engaging with the second bracket and a second end portion engaging with the pawl within the accommodating void,the pawl integrally including a ratchet portion, a pawl side reverse wall portion, and a pawl side return wall portion, the ratchet portion allowing a relative rotation of the first bracket and the second bracket in a first direction and prohibiting a relative rotation of the first bracket and the second bracket in a second direction opposite from the first direction by engaging with the ratchet inner teeth portion in a case where the pawl is biased to rotate in a normal direction by the pawl reverse spring, the pawl side reverse wall portion allowing the relative rotation of the first bracket and the second bracket in the second direction by making contact with the bracket side reverse wall portion in a case of the relative rotation of the first bracket and the second bracket in the first direction so that the pawl is reversed by being biased to rotate in a reverse direction by the pawl reverse spring, the pawl side return wall portion bringing the pawl to be returned by being biased to rotate in the normal direction by the pawl reverse spring by making contact with the bracket side return wall portion in a case of the relative rotation of the first bracket and the second bracket in the second direction,wherein the first bracket includes an approach wall portion on which the ratchet portion slides before the ratchet portion engages with the ratchet inner teeth portion at the time of the relative rotation of the first bracket and the second bracket in the first direction in a case where the pawl is biased to rotate in the normal direction by the pawl reverse spring, a return engagement projection formed to project at the approach wall portion, and a return engagement recess portion formed to be dented at the ratchet portion and to which the return engagement projection is fitted in a case where the pawl is returned. 14. A seat adjustment apparatus for a vehicle, comprising: a first bracket integrally including a ratchet inner teeth portion, a bracket side reverse wall portion, and a bracket side return wall portion;a second bracket pivotally supported by the first bracket to define an accommodating void with the first bracket, the second bracket adjusting a posture of a seat for a vehicle by rotating relative to the first bracket;a holding member inhibiting the first bracket and the second bracket from moving in a rotational axial direction of the second bracket;a pawl supported by the second bracket within the accommodating void and being pivotable about an axis in parallel with the rotational axial direction of the second bracket; anda pawl reverse spring including a first end portion engaging with the second bracket and a second end portion engaging with the pawl within the accommodating void,the pawl integrally including a ratchet portion, a pawl side reverse wall portion, and a pawl side return wall portion, the ratchet portion allowing a relative rotation of the first bracket and the second bracket in a first direction and prohibiting a relative rotation of the first bracket and the second bracket in a second direction opposite from the first direction by engaging with the ratchet inner teeth portion in a case where the pawl is biased to rotate in a normal direction by the pawl reverse spring, the pawl side reverse wall portion allowing the relative rotation of the first bracket and the second bracket in the second direction by making contact with the bracket side reverse wall portion in a case of the relative rotation of the first bracket and the second bracket in the first direction so that the pawl is reversed by being biased to rotate in a reverse direction by the pawl reverse spring, the pawl side return wall portion bringing the pawl to be returned by being biased to rotate in the normal direction by the pawl reverse spring by making contact with the bracket side return wall portion in a case of the relative rotation of the first bracket and the second bracket in the second direction,wherein the seat adjustment apparatus is disposed between a seat cushion and an ottoman to hold the ottoman by restricting the relative rotation of the first bracket and the second bracket in the first direction in a case where the ottoman is in a retracted state, to allow the ottoman to operate in a deploying direction by allowing the relative rotation of the first bracket and the second bracket in the first direction and inhibit the ottoman to operate in a retracting direction by restricting the relative rotation of the first bracket and the second bracket in the second direction in an adjusting region to a maximally deployed state of the ottoman, and to allow the ottoman to operate in the retracting direction by allowing the relative rotation of the first bracket and the second bracket in the second direction in a case where the ottoman is further operated in the deploying direction from the maximally deployed state so that the ottoman is returned to the retracted state,wherein the seat adjustment apparatus further comprises: a hook rotatably connected to one of a first member that is provided at the seat cushion and a second member that is provided at the ottoman, the first member and the second member being arranged between the seat cushion and the ottoman;a striker pin fixed to the other of the first member and the second member and configured to hook the hook in a case where the ottoman is in the retracted state to restrict an operation of the ottoman in the deploying direction; anda contact member provided at the other of the first member and the second member to which the striker pin is fixed;wherein the hook is guided by the striker pin in a case where the ottoman in the retracted state is further operated in the retracting direction to rotate to an unlocked position at which the striker pin is releasable from the hook to allow the operation of the ottoman in the deploying direction, and is guided by the contact member in association with the operation of the ottoman in the deploying direction to rotate to a locked position at which the hook hooks the striker pin in the retracted state of the ottoman, the hook hooking the striker pin in the retracted state of the ottoman in association with the operation of the ottoman in the retracting direction, andwherein the seat adjustment apparatus further comprises a reverse spring biasing the hook to rotate to the locked position in the retracted state of the ottoman, biasing the hook to rotate to the unlocked position by being turned over in association with a rotation of the hook that is guided by the striker pin in a case where the ottoman in the retracted state is further operated in the retracting state, and biasing the hook to rotate to the locked position by being turned over in association with the rotation of the hook that is guided by the contact member along with the operation of the ottoman in the deploying direction.