Active headrest mechanism for protecting neck in rear end collision

Abstract

An active headrest mechanism used to protect the neck when a tail gating accident happens relates to a structural design of a headrest part in a seat system. The mechanism comprises a control model, a driving motor and a connecting rod driving mechanism. The control model is connected with the driving motor by a signal line and the connecting rod driving mechanism contains a parallelly arranged upper cross connecting rod mechanism, a lower cross connecting rod mechanism and a driving lead screw connected with the motor. The invention is combined with an active safety system and adjusts the distance between the headrest and the head of the passenger in the car, according to the judgment of the active safety system on the danger caused by the collision, to avoid and reduce the damage on the neck of the passenger in the car when the tail gating accident happens.

Description

technical field [0001] The invention relates to a structural design of a headrest part of a seat system, which is used for neck protection of an occupant in a rear-end collision, and belongs to the technical field of automotive interior equipment. Background technique [0002] The forms of traffic accidents are divided into frontal collision, side collision, rear-end collision and pedestrian collision. According to the statistics of traffic accidents in 2004, in the total number of motor vehicle accidents, frontal collisions accounted for 23.9%, side collisions accounted for 38%, and rear collisions accounted for 15.5%. The research on the occupant protection strategy is aimed at the rear-end collisions in the above-mentioned forms. The frequency of rear-end collisions is high. Although the fatal injuries to the occupants and the serious deformation of the car body are relatively small, they will cause neck whiplash injuries to the occupants of the front vehicle. , and its ...

AI Technical Summary

Problems solved by technology

[0004] The traditional active headrest is generally a purely mechanical structure, and there are two main design ideas. The first one relies 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. This solution can use the energy of the collision, but the response time is long. Whiplash has already occurred; the second type relies on the energy of the collision to trigger the headrest, which is driven by a spring. Although the movement of the headrest mechanism is reversible, it cannot be retracted by itself, and an external force (such as a hand push) is required to make it retract

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