Active headrest mechanism for protecting neck in rear end collision

Abstract

An active headrest mechanism for neck protection in rear-end collisions relates to the structural design of the headrest part of a seat system. The mechanism includes a control module, a driving motor and a connecting rod driving mechanism, and the control module and the driving motor are connected through a signal line; the connecting rod driving mechanism includes an upper cross linkage mechanism arranged in parallel, a lower cross linkage mechanism and a motor connected drive screw. The invention is combined with the active safety system, and adjusts the distance between the headrest and the head of the occupant of the vehicle according to the judgment of the active safety system of the vehicle on the risk of collision, so as to avoid and reduce the neck injury of the occupant of the vehicle in the rear-end collision.

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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