Tearing induction device for PAB door and manufacturing method thereof

Abstract

According to the present invention, a tear inducing device for a passenger airbag (PAB) door comprises: a score line provided on the PAB door and configured to open when an airbag cushion is deployed; and a plurality of tear-inducing pouches disposed on both sides of the score line to face each other and arranged in a longitudinal direction of the score line. Each of the plurality of pockets includes an empty interior space and a ridge including a flat portion toward the airbag cushion. Conventional tear-inducing ribs are replaced with pockets such that the contact area is increased to stably induce tear of the score line.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0010414, filed on January 25, 2021, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a passenger airbag (PAB), and more particularly, to a device for inducing tearing of a PAB door upon deployment of the airbag, and to a method of manufacturing a PAB door having the device. Background technique [0004] The passenger airbag (PAB) is installed in the crash pad of the car as a safety device, and in an emergency situation, the passenger airbag (PAB) is deployed through the PAB door (or slide). Depending on the construction method, there are various methods of assembling the PAB gate. However, among these methods, a structure in which the PAB door is coupled with the rear surface of the crash pad by vibration welding is widely used. [0005] The ...

AI Technical Summary

Problems solved by technology

In addition, the airbag cushion may be torn during deployment due to the large frictional resistance and interference with the airbag cushion due to the large number of uneven shapes caused by the excessive number and height of the ribs

[0009] In addition, since the conventional tear-inducing ribs 15a and 15b need to be formed of materials such as thermoplastic olefin (thermoplastic olefin, TPO), which is the material of the PAB door, various types of problems may occur under the condition of the unfolding temperature, and may Damage to the airbag cushion, thereby interfering with the proper function of the airbag

For example, at high temperature (about 85°C), the ribs 15a and 15b are crushed and laid down, which leads to the degradation of the tear-inducing function

At low temperature (approximately -35°C), cracks appear in the ribs 15a and 15b, as a result, sharp residual edges are produced as debris scatter, which may lead to damage (tearing) of the airbag cushion 19, resulting in fatal loss of function

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