Active headrest use method

Abstract

The invention discloses an active headrest use method. The use method comprises the following steps that a control module electrically connected with an air cylinder is communicated with an automobile active safety system; when a distance between a vehicle behind an automobile and the automobile is within a dangerous value range, the control module directly transmits an order to the air cylinder; an output end of the air cylinder extends and drives a head plate to move forward, so a supporting part of the headrest closes to a driver head; when a distance between the vehicle behind the automobile and the automobile is within a safe value range, the control module can directly control retraction of the air cylinder; and the output end of the air cylinder drives the head plate to move backward and the driver head and the supporting part of the headrest reset. Manual operation is unnecessary and synchronization between the headrest protection and the automobile safety system can be achieved and reliability coefficient of the automobile driving safety can be enhanced.

Description

technical field [0001] The invention relates to an intelligent automobile active safety system, in particular to a method for using an active headrest. 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 relative to the upper torso during a rear-e...

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, cumbersome to operate, unusable with intelligent active safety system

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