Front-collision trigger system of automobile airbag based on mercury switch

Abstract

The invention discloses a front collision triggering system of an automobile safety airbag based on a mercury switch. The front collision triggering system comprises a horizontal sensor seat horizontally and fixedly arranged on an automobile, wherein a closed cylindrical shell is fixedly installed on the sensor base through a supporting piece; and the axis of the cylindrical shell is parallel to ahorizontal plane. The front collision triggering system is simple in structure; in the low-strength speed reduction state of automobile speed reduction and emergency brake, the inertia force generated by the eccentric balance weight cannot overcome the elastic force of the spring while the relative position of the eccentric balance weight is not changed, and the liquid mercury in the mercury storage cavity is completely isolated from the first positive electrode / first negative electrode in the electrode cavity in the state, so that the phenomenon that the mercury splashes onto the electrode due to bumpy road surface does not exist, and the phenomenon of false triggering is avoided.

Description

technical field [0001] The invention belongs to the field of auto parts. Background technique [0002] The mercury switch type collision sensor is made of the good conductivity of mercury. When the car collides, the deceleration will cause the mercury to generate inertial force. The component force of the inertial force in the moving direction of the mercury will throw the mercury to the sensor electrode, so that the two electrodes are connected, thereby turning on the power supply of the airbag igniter circuit; Its violent up and down bumps may cause the mercury to oscillate and splash to the trigger electrode, which will cause the airbag to trigger incorrectly and cause an accident; or in special scenarios such as the car needs to be hoisted, the attitude of the car needs to change, and Changes in the attitude of the car will also cause mercury to flow to the electrodes and trigger the airbag, resulting in false triggering of the airbag. Contents of the invention [00...

AI Technical Summary

Problems solved by technology

The component force of the inertial force in the moving direction of the mercury will throw the mercury to the electrode of the sensor, so that the two electrodes are connected, thereby turning on the power supply of the airbag igniter circuit; Its violent up and down bumps may cause the mercury to oscillate and splash to the trigger electrode, which will cause the airbag to be triggered incorrectly and cause an accident; or in special scenarios such as the car needs to be hoisted, the attitude of the car needs to change, and Changes in the attitude of the car will also cause mercury to flow to the electrodes and trigger the airbag, resulting in false triggering of the airbag

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