Adjusting method of active protection device of vehicle seat headrest

Abstract

The invention discloses an adjusting method of an active protection device of a vehicle seat headrest. The adjusting method comprises the following steps: firstly, a control module electrically connected with a cylinder is directly communicated with an active safety system of a vehicle; when a distance from a vehicle behind the vehicle to the vehicle is located in a risk range, the control module directly transmits a command to the cylinder, so that a support part of the headrest approaches to a head part of a passenger so as to realize the limitation of a backward motion of the head part relative to an upper trunk in rear-end collision in advance; when a head plate moves, and the movement of an adjusting rod generates such unstable states as shaking, a moving structure consisting of a connecting rod A, a connecting rod B and a connecting rod C can mutually eliminate the acting stress generated by the adjusting rod; and when the distance from the vehicle behind the vehicle to the vehicle is located in a safety range, the control module directly controls the cylinder to shrink back to return the head part of the passenger and the support part of the headrest without needing manual operation, so that the synchronization of the headrest protection and the vehicle safety system is realized.

Description

technical field [0001] The invention relates to an intelligent automobile active safety system, in particular to an adjustment method of an automobile seat headrest active protection device. Background technique [0002] The forms of traffic accidents are divided into frontal collision, side collision, rear-end collision and pedestrian collision. Among them, rear-end collisions have a high probability of occurrence due to their unpredictability. Therefore, in the study of automobile safety, when planning the protection strategy for the occupants of the vehicle, the rear-end collision in the above-mentioned form, although the fatal injury to the occupants and the serious deformation of the vehicle body are relatively small, it will still cause serious damage to the occupants of the front vehicle. Whiplash to the neck. [0003] In the prior art, the neck protection is mainly based on the seat system. The protection principle is to limit the backward movement of the head rela...

AI Technical Summary

Problems solved by technology

Common active headrests on the market are generally of purely mechanical structure, and there are two main types. One is to rely on the relative movement of the occupant and the seat to push the link mechanism connected with the headrest, and then push the headrest close to the occupant's head, such as SAAB Active headrest, during the collision process, the occupant presses the seat backward due to inertia, and activates the headrest through the space linkage mechanism. The response time of the pillow mechanism is long, that is, the whiplash injury has occurred before the headrest takes effect; the second is that the headrest is triggered by the collision energy, which is driven by a spring. Although the movement of the headrest mechanism is reversible, it cannot be retracted by itself and requires an external Apply force to reset it, the operation is cumbersome, and the intelligent active safety system cannot be used; and during the movement of the headrest mechanism, the output end of the power drive device will be damaged due to special circumstances such as the driving state of the vehicle or its own motion loss. The output power is unstable, that is, the head restraint mechanism has an intermittent sense of frustration. In this case, once a collision occurs, the moving head restraint mechanism will cause serious injury to the occupant's neck

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