Method for adjusting automobile seat headrest with protection function

Abstract

The invention discloses a method for adjusting an automobile seat headrest with a protection function. The method comprises the following steps: firstly, a control module electrically connected with a cylinder is directly communicated with an automobile active safety system; when a distance of a vehicle behind to the present automobile is within a dangerous value range, the control module directly transmits a command to the cylinder so that an adjusting rod drives a head plate to move forwards, leading to that a supporting portion of the headrest gets close to the head of a passenger; in the movement process of the head plate, a fixed block is mounted on the adjusting rod and a connecting rod A, a connecting rod B and a connecting rod C are arranged on the fixed block, a bottom surface of the head plate and an inner sidewall of the frame, whereby the movement of the head plate is supported by the inner walls of the two sides of the frame and the fixed block simultaneously; when a distance of the vehicle behind to the present automobile is within a safe value range, the control module directly controls the cylinder to retract and the head plate directly falls into a rectangular groove so that the head of the passenger and the supporting portion of the head rest return, and therefore, synchronization of headrest protection and the automobile safety system is realized.

Description

technical field [0001] The invention relates to an intelligent automobile active safety system, in particular to a method for adjusting a headrest of an automobile seat with a protective function. 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 hea...

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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