JP-2026075012-A - Airbag system

JP2026075012AJP 2026075012 AJP2026075012 AJP 2026075012AJP-2026075012-A

Abstract

[Challenge] To suppress the reduction in protective performance caused by airbags. [Solution] The airbag device comprises a lower chamber located at the front of the vehicle and an upper chamber located vertically above the lower chamber and supported by the lower chamber, wherein the lower chamber is formed in an annular shape, and the upper chamber has a first extending portion extending in the left-right direction of the vehicle along the front of the lower chamber and a pair of second extending portions extending in the front-rear direction of the vehicle along each side of the lower chamber. [Selection Diagram] Figure 2

Inventors

音▲辻▼ 大翼

Assignees

株式会社SUBARU

Dates

Publication Date: 20260507
Application Date: 20241021

Claims (5)

The lower compartment located at the front of the vehicle, An upper chamber located vertically above the lower chamber and supported by the lower chamber, Equipped with, The aforementioned lower chamber is formed in an annular shape, The aforementioned upper room is, A first extending portion extends in the left-right direction of the vehicle along the front part of the lower chamber, A pair of second extending portions extending in the vehicle's longitudinal direction along each side of the lower chamber, An airbag device having an airbag.
The airbag device according to claim 1, wherein the lower chamber is formed in a rectangular, annular shape.
The airbag device according to claim 1 or 2, wherein the upper chamber further has a third extending portion that extends in the left-right direction of the vehicle along the rear of the lower chamber and is formed in an annular shape.
The airbag device according to claim 1 or 2, wherein the lower chamber is configured to have a higher pressure than the upper chamber.
The airbag device according to claim 1 or 2, wherein the upper chamber is configured to deploy with a delay compared to the deployment of the lower chamber.

Description

This invention relates to an airbag system. Vehicles equipped with airbag systems that deploy from the front to protect cyclists, motorcyclists, or pedestrians in the event of a collision are becoming widespread. Hereinafter, cyclists, motorcyclists, or pedestrians will be referred to as "pedestrians, etc." For example, Patent Document 1 discloses an automobile equipped with a substantially U-shaped airbag having a base portion that deploys along the cowl top panel and a pair of side portions that deploy along the left and right A-pillars of the windshield. Japanese Patent Publication No. 2006-219116 Figure 1 is a schematic diagram showing the general configuration of an airbag device according to an embodiment of the present invention before deployment.Figure 2 is a first schematic diagram showing the general configuration of the airbag device after deployment according to the same embodiment.Figure 3 is a second schematic diagram showing the general configuration of the airbag device after deployment according to the same embodiment.Figure 4 is a diagram illustrating the unfolding process of the lower chamber according to the same embodiment.Figure 5 is a diagram illustrating the unfolding process of the upper chamber according to the same embodiment.Figure 6 is a schematic diagram showing the general configuration of the upper chamber after unfolding, relating to a modified example.Figure 7 is a schematic diagram showing the general configuration of a pressure adjustment mechanism according to a modified example. The embodiments of the present invention will be described in detail below with reference to the attached drawings. The specific dimensions, materials, numerical values, etc., shown in these embodiments are merely illustrative to facilitate understanding of the invention and, unless otherwise specified, do not limit the present invention. In this specification and the drawings, elements having substantially the same function and configuration are denoted by the same reference numerals to avoid redundant explanations, and elements not directly related to the present invention are omitted from the illustrations. <1. Airbag System Configuration> First, the configuration of the airbag device 100 according to an embodiment of the present invention will be described with reference to Figures 1 to 3. Figure 1 is a schematic diagram showing the general configuration of the airbag device 100 according to an embodiment of the present invention before deployment. Figure 2 is a first schematic diagram showing the general configuration of the airbag device 100 according to an embodiment of the present invention after deployment. Figure 3 is a second schematic diagram showing the general configuration of the airbag device 100 according to an embodiment of the present invention after deployment. As shown in Figures 1 to 3, the airbag system 100 is installed in the vehicle 10. The airbag system 100 comprises, for example, an airbag 102 and an inflator 104. Before deployment, the airbag system 100 is located in the rear of the engine compartment below the cowl top panel 12 or below the hood 14 in the vehicle 10. When a collision with a bicycle, motorcycle, or pedestrian is detected in vehicle 10, gas is supplied from the inflator 104 to the airbag 102. As a result, the airbag 102 deploys from between the cowl top panel 12 and the windshield 16 to the front of vehicle 10 F. The number of inflators 104 is not limited. As shown in Figures 2 and 3, the airbag 102 comprises a lower chamber 110 and an upper chamber 120. The arrangement, shape, pressure, etc., of the lower chamber 110 and upper chamber 120 during deployment will be described below. The lower chamber 110 is positioned at the front F of the vehicle 10. The front F of the vehicle 10 includes at least the portion of the vehicle 10 that includes the windshield 16. As shown in Figure 2, the lower chamber 110 is positioned, for example, spanning from the cowl top panel 12 to the windshield 16. Note that the lower chamber 110 only needs to be positioned on the windshield 16; for example, it may be positioned only on the windshield 16, or it may span from the windshield 16 to the hood 14. The lower chamber 110 is formed in an annular shape. The lower chamber 110 may, for example, be formed in a rectangular annular shape. In this embodiment, the lower chamber 110 has a front portion 112, a rear portion 114, and a pair of side portions 116a and 116b. In this embodiment, the internal spaces of the front portion 112, the rear portion 114, the side portions 116a, and the side portions 116b are in communication. The shape of the cross-section perpendicular to the extending direction of the front portion 112, the rear portion 114, and the side portions 116a and 116b is, for example, a perfect circle. The front portion 112 is positioned, for example, across the cowl top panel 12 and the windshield 16. The front portion 112 extends in the lateral direction of the vehicl