Headrest adjusting structure capable of preventing whiplash injury of passenger

Abstract

The invention discloses a headrest adjusting structure capable of preventing a whiplash injury of a passenger. The headrest adjusting structure comprises a cylinder, a control module and a frame; the frame is fixed within the headrest; an output end of the cylinder is connected with one end of an adjusting rod and the other end of the adjusting rod is connected with a head plate; the adjusting rod is mounted on an end portion of the cylinder; a coaxial fixed block is mounted on the adjusting rod; two connecting rods B are symmetrically arranged in an axis of the adjusting rod on an end face of one side, directly facing the head plate, of the fixed block; the free ends of the connecting rods B are hinged to one end of a connecting rod A and a connecting rod C, respectively; the other end of the connecting rod A is hinged to the bottom of the head plate, while the other end of the connecting rod C is hinged to a sidewall of the frame. When a distance of a vehicle behind the present automobile to the present automobile is within a safe value range, the control module directly controls the cylinder to retract and the adjusting rod drives the head plate to move backwards so that the head of a passenger and a supporting portion of the head rest return, and therefore, no manual operation is required, synchronization of headrest protection and an automobile safety system is realized; furthermore, a reliability coefficient of automobile driving safety is enhanced.

Description

technical field [0001] The invention relates to an active safety system of an intelligent automobile, in particular to a headrest adjustment structure capable of preventing occupants from being whipped. 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 t...

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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