Using method of active headrest for protecting safety of neck of automobile passenger

Abstract

The invention discloses a using method of an active headrest for protecting safety of the neck of an automobile passenger. The using method includes the following steps that firstly, a control module electrically connected with an air cylinder is directly communicated with an automobile active safety system; when the distance between a vehicle located behind an automobile and the automobile is within a dangerous value range, the control module directly transmits a command to the air cylinder, the output end of the air cylinder stretches out, and a head plate is driven to move forwards, so that the supporting part of the headrest gets close to the head of the passenger, the backward movement, relative to the upper trunk, of the head is limited in advance when rear-end collision happens, it is avoided that the air cylinder is not started in time when the collision happens, and consequently whiplash injuries are caused; and when the distance between the vehicle located behind the automobile and the automobile is within a safe value range, the control module directly controls the air cylinder to retract back, in other words, the output end of the air cylinder drives the head plate to move backwards, and the head of the passenger and the supporting part of the headrest can reset. No manual operation is needed, and synchronization of headrest protection and the automobile safety system is achieved.

Description

technical field [0001] The invention relates to an intelligent automobile active safety system, in particular to a method for using an active headrest for protecting the neck safety of automobile occupants. 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 ...

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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