Seat backrest angle adjusting structure with buffering and damping functions

Abstract

The invention discloses a seat backrest angle adjusting structure with buffering and damping functions, which is characterized in that a hinge bracket, a torsion spring, a mounting bracket and a volute spiral spring are sequentially sleeved on a backrest rotating shaft from inside to outside, the hinge bracket is fixed with the backrest rotating shaft, the mounting bracket is in running fit with the backrest rotating shaft, and the inner end of the volute spiral spring is clamped on the backrest rotating shaft; the outer end of the volute spiral spring is hooked on the mounting bracket, one end of the torsional spring is fixed on the hinge bracket, the other end of the torsional spring is fixed on the mounting bracket, and when the backrest is forwards overturned to the cushion from the use position, the torsional spring can be changed into a compressed state from a stretched state. When the backrest is forwards overturned to the seat cushion from the using position, driving force in the same direction as the volute spiral spring can be provided in the initial overturning stage to assist the backrest in forwards overturning to a certain angle, resistance in the reverse direction of the volute spiral spring is provided in the subsequent stage, the overturning speed of the backrest is reduced, and therefore abnormal sound is prevented from being generated, and people are prevented from being hurt by the backrest.

Description

technical field [0001] The invention relates to the technical field of car seats, in particular to a seat back angle adjustment structure with a buffer damping function. Background technique [0002] The car seat is an indispensable part in the car, and the angle of the seat back directly affects the riding comfort of the occupant, and then affects the driving safety. At present, the seat back adjusts the backrest angle through a seat back adjustment structure composed of a planar scroll spring and a link mechanism. This commonly used seat back adjustment structure, when the seat back is laid down forward from the use position, first unlocks the backrest, and then relies on the elastic force released by the planar scroll spring to drive the backrest to rotate forward until it is laid flat. [0003] The problem in the above process is: when the seat back is laid down forward, the elastic force released by the scroll spring explodes instantly, which easily leads to a large fo...

AI Technical Summary

Problems solved by technology

[0003] The problem in the above process is: when the seat back is laid down forward, the elastic force released by the scroll spring explodes instantly, which easily leads to a large forward driving force of the seat back. speed can be controlled

Otherwise, the overturning speed of the seat back is too fast, it is easy to produce abnormal noise, and there is no cushioning, which seriously affects the comfort of the ride

When passengers do not pay attention or misuse, there will be some potential hidden dangers: it is easy to cause damage to the objects on the cushion or damage to the seat cover; it will cause harm to the pets on the cushion; when there are passengers lying on the cushion, Hitting the backrest forward may also cause injury to passengers

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