SEAT ANGLE ADJUSTMENT DEVICE AND SEAT HAVING THE SAME

摘要

A seat angle adjustment device includes a ratchet wheel, a stop plate, a locking slipper and a pawl, wherein a first stop position limiting part and a second stop position limiting part are arranged on the stop plate, when the first stop position limiting part is subjected to a rotating torque in a rotational direction, the locking slipper in a locking position circumferentially abuts against the first stop position limiting part; when the rotating torque is higher than a first preset torque value, the pawl in an extended state is driven by the ratchet wheel to rotate until the tooth part on one side of the pawl is completely engaged with the ratchet wheel; and when the rotating torque is higher than a second preset torque value, the second stop position limiting part abuts against the pawl. A seat having the seat angle adjustment device is also provided.

主权项

1. A seat angle adjustment device, comprising:
a ratchet wheel and a stop plate rotatable coaxially; and at least one locking slider configured to be movable radially with respect to the ratchet wheel between a locked position and a retracted position, wherein, at the locked position, a toothed part of the locking slider is engaged with a toothed part of the ratchet wheel, and a circumferential relative position between the ratchet wheel and the stop plate is fixed, and at the retracted position, the toothed part of the locking slider is disengaged from the toothed part of the ratchet; wherein the seat angle adjustment device further comprises: at least one pawl configured to be movable radially with respect to the ratchet wheel between an extended position and a retracted position, wherein at the extended position, a toothed part of the pawl is semi-engaged with the toothed part of the ratchet wheel, and at the retracted position, the toothed part of the pawl is disengaged from the toothed part of the ratchet wheel; and a driving device configured to selectively drive the locking slider to be at the locked position or the retracted position, and to selectively drive the pawl to be at the extended position or the retracted position; and wherein, a first stopping and position-limiting part and a second stopping and position-limiting part are arranged on the stop plate and are respectively located at a downstream side of a rotational direction of the locking slider and a downstream side of a rotational direction of the pawl; and the first stopping and position-limiting part is configured to abut against the locking slider at the locked position circumferentially in a case that the locking slider is subjected to a rotational torque in the rotational direction; in a case that the rotational torque is greater than a first preset torque value, the first stopping and position-limiting part is configured to generate a circumferential deformation under the action of the locking slider, and the pawl at the extended position is configured to be driven by the ratchet wheel to rotate until a toothed part at one side of the pawl is fully engaged with the ratchet wheel; and in a case that the rotational torque is greater than a second preset torque value, the second stopping and position-limiting part is configured to abut against the pawl, and the second preset torque value is greater than the first preset torque value.