Active car seat back device

Abstract

The invention discloses an active type car seat backrest device. The active type car seat backrest device comprises a seat backrest skeleton, a waist trigger plate, a connection rod, a cross rod, a back driven plate, a first rocking bar, a second rocking bar, a first connection rod, a second connection rod, a first spring and a second spring, wherein two ends of the cross rod are respectively welded with two sides of the seat backrest skeleton, the connection rod sleeves the middle of the cross rod and can rotate relatively to the cross rod, the lower end of the connection rod is welded with the waist trigger plate, the upper end of the connection rod is welded with the back driven plate, the upper ends of the first rocking bar and the second rocking bar are respectively connected with the upper portions of two sides of the back driven plate, the first rocking bar and the second rocking bar can rotate relatively to the back driven plate, the first rocking bar, the second rocking bar, the first connection rod and the second connection rod form a link mechanism, two ends of the first spring are respectively connected with the first rocking bar and one side of the seat backrest skeleton, and two ends of the second spring are respectively connected with the second rocking bar and the other side of the seat backrest skeleton. The active type car seat backrest device can timely protect the head and the neck of a passenger before impact force is transmitted to the head and the neck of the passenger, and effectively reduces whiplash injury suffered by the passenger.

Description

technical field [0001] The invention relates to an automobile body part, in particular to an active automobile seat backrest device. Background technique [0002] A car rear-end collision is one of the common traffic accidents. During the rear-end collision, the neck of the occupant will be injured by whiplash due to excessive stretching and bending. In order to reduce whiplash injuries to occupants caused by rear-end collisions, domestic and foreign automobile companies currently mainly use active safety head restraints as a safety configuration to protect the occupants' head and neck to improve the anti-whiplash injury performance of seats. [0003] For example, CN202764756U discloses an active safety head restraint device and a car seat. Its active safety head restraint device includes a trigger plate, a transmission rod, a rotating mechanism, a headrest jack and a headrest, and the trigger plate passes through the transmission rod and the rotating mechanism The rotating...

AI Technical Summary

Problems solved by technology

[0004] Because in the process of rear-end collision, the impact force will make the back of the occupant squeeze toward the back of the car seat at the first time, and then drive the neck and head to swing backward rapidly, and then at the end of the impact, it will Under the action of the reaction force and inertia of the backrest of the car seat on the back of the occupant, the occupant's body leans forward rapidly, and then drives the neck and head to swing forward rapidly; Late, causing the headrest to come into contact with the occupant's head later, and the occupant's head and neck cannot be restrained in time, and its protective effect on the occupant's whiplash injury is relatively small

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