vehicle airbag

Abstract

The invention discloses a vehicle airbag, comprising: a gas generator, which sprays high-pressure gas; an airbag cushion, which is formed with a vent hole for discharging part of the high-pressure gas; and a vent hole cover, which is used to cover the vent hole and a working unit for causing the vent cover to cover the vent hole after a predetermined time elapses when the airbag cushion is deployed, so that not only the neck injury of the occupant can be prevented, but also the U.S. new car safety can be satisfied NCAP (US-NCAP). The present invention can cover the exhaust hole of the airbag cushion by detonating the gunpowder at the optimal time point, so the deployment stability and controllability of the airbag can be improved. Moreover, the present invention can reduce the degree of injury to the passenger's head and neck by precisely controlling the shielding of the exhaust hole.

Description

technical field [0001] The invention relates to a vehicle airbag, in particular to a vehicle airbag which can not only prevent neck injuries of passengers, but also meet the US-NCAP standard for new car safety evaluation when a vehicle collides. Background technique [0002] Vehicles are generally equipped with airbag modules to protect the driver and passengers in the event of a collision during driving. The airbag module can be divided into a driver's seat airbag arranged in front of the driver's seat on the vehicle steering wheel to protect the driver, a front passenger's seat airbag arranged in the front dash board of the passenger's seat to protect the passenger's passenger seat, and a protection Various airbag modules for other passengers can be divided into curtain airbag modules and seat airbag modules according to their installation positions. [0003] figure 1 It is a side view showing an example of the deployed state of the airbag module for the passenger seat o...

AI Technical Summary

Problems solved by technology

This is due to the fact that the vent cannot function as a vent when it is obscured by the windshield

[0007] However, there have been cases where the internal pressure of the airbag cushion has dropped due to the excessive discharge of high-pressure gas through multiple exhaust holes, which has not fully exerted its own buffering function and aggravated the degree of head injury of passengers. figure 1 As shown, in order to reduce the degree of passenger head injury, a device for opening the exhaust hole by using the exhaust hole cover (for convenience of description, hereinafter referred to as "vent hole opening part 1") is added, which uses the exhaust hole cover to shield the exhaust The air hole, which utilizes its deployment force when the airbag cushion is inflated, cuts the tether that binds the vent cover to allow the vent cover to open the vent

[0008] The airbag for the passenger seat of a vehicle based on the prior art can reduce the degree of passenger head injury to a certain extent through the vent hole opening part 1, but the most important item in the United States New Car Safety Assessment Standard (US-NCAP), that is, the passenger's neck The damage is reduced

[0009] And in order to apply the vent hole opening part 1, in order to prevent other vent holes not related to the vent hole opening part 1 (for convenience of description, hereinafter simply referred to as "general vent hole 2") from causing an excessive drop in the internal pressure of the airbag cushion, It is necessary to reduce the size of the general vent hole 2, but in the non-seat belt-wearing regulation test (that is, a test item in which the mannequin is not fixed with a seat belt), the vent opening part 1 does not activate frequently, And because the internal pressure of the airbag cushion 10 is too large due to the small size of the general vent hole 2, it has a negative effect on the degree of injury to the head and neck of the passenger, and when the vent hole opening part 2 is activated, the inside of the airbag cushion 10 Significant drop in pressure

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