AIRBAG APPARATUS

• US 20170043734A1
• Filed: 07/08/2016
• Published: 02/16/2017
• Est. Priority Date: 08/13/2015
• Status: Active Grant

• Current Assignee: Hyundai Mobis Co., Ltd.
• Original Assignee: Hyundai Mobis Co., Ltd.
• Inventors: PARK, Hae Kwon, Min, Byung Ho
• Granted Patent: US 9,713,996 B2
• Time in Patent Office: Days
• CPC Class Codes: B60R 19/205 inflatable in the direction of an obstacle upon impending impact, e.g. using air bags
• CPC Class Codes: B60R 19/48 combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
• CPC Class Codes: B60R 2021/23308 the individual compartments defining the external shape of the bag
• CPC Class Codes: B60R 2021/23386 External tether means

Abstract

An airbag apparatus may include: an inflator part installed in a vehicle so as to spray gas; and an airbag cushion part deployed by the gas sprayed by the inflator part. The airbag cushion part may include: a main cushion to which the gas sprayed by the inflator part is introduced; an auxiliary cushion connected to the main cushion and tucked into the main cushion; and an expansion limiting part connecting the main cushion to the tucked-in auxiliary cushion at a preset pressure or less so as to limit expansion of the auxiliary cushion.

Claims

1. An airbag apparatus comprising:

an inflator part installed in a vehicle so as to spray gas; and

an airbag cushion part deployed by the gas sprayed by the inflator part,

wherein the airbag cushion part comprises;

a main cushion to which the gas sprayed by the inflator part is introduced;

an auxiliary cushion connected to the main cushion and tucked into the main cushion; and

an expansion limiting part connecting the main cushion to the tucked-in auxiliary cushion at a preset pressure or less so as to limit expansion of the auxiliary cushion.

2. The airbag apparatus of claim 1, wherein the main cushion is divided into a plurality of chambers by a separator, and the separator has holes through which gas is moved between the respective chambers.

3. The airbag apparatus of claim 1, wherein when the expansion limitation by the expansion limiting part is released, the auxiliary cushion is expanded by the gas sprayed from the inflator part, and protrudes to the outside of the main cushion.

4. The airbag apparatus of claim 3, wherein the airbag cushion part comprises a pair of auxiliary cushions coupled to both ends of the main cushion.

5. The airbag apparatus of claim 3, wherein the auxiliary cushion is integrated with the main cushion.

6. The airbag apparatus of claim 3, wherein the expansion limiting part comprises a tether which is sewed and connected to the main cushion and the auxiliary cushion.

7. The airbag apparatus of claim 6, wherein when the internal pressure of the main cushion exceeds the preset pressure, the connection between the expansion limiting part and the main cushion or the auxiliary cushion is removed to allow expansion of the auxiliary cushion.

8. The airbag apparatus of claim 1, wherein the auxiliary cushion has a vent hole through which the gas contained in the auxiliary cushion is discharged.

9. The airbag apparatus of claim 8, wherein the airbag cushion part further comprises a variable hole part coupled to the auxiliary cushion and adjusting the opening degree of the vent hole according to the internal pressure of the auxiliary cushion.

10. The airbag apparatus of claim 9, wherein the variable hole part is coupled to the auxiliary cushion so as to cover the vent hole, and has a variable vent hole formed therethrough, the variable vent hole having a smaller diameter than the vent hole.

11. The airbag apparatus of claim 10, wherein the airbag cushion part comprises a plurality of variable hole parts which are sequentially coupled, and each of the variable hole parts has a small diameter as the variable hole part is coupled at low priority.

12. The airbag apparatus of claim 11, wherein when the internal pressure of the auxiliary cushion rises to the preset pressure or more, the couplings between the plurality of variable hole parts and the auxiliary cushion or the neighboring variable hole part are removed to increase to the opening degrees of the vent holes.

13. The airbag apparatus of claim 12, wherein the vent hole and the variable hole part form a concentric circle.