Side Airbag Layout for Early Occupant Restraint Beside Console Box

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Solution Overview

Problem

Conventional side airbag devices experience delayed restriction of occupant movement towards the inner side in a vehicle width direction due to rapid inflation and deployment, often shifting positions relative to the console box, leading to ineffective early-stage restraint.

Innovation Solution

A side airbag device with an inflator positioned along the seatback and airbag design featuring a continuous chamber for the support and hip protection portions, which inflate and deploy above and beside the console box, ensuring stable deployment and early-stage restraint by maintaining contact with the console box surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the airbag inflates and deploys rapidly, then the restraint effectiveness is improved, but the airbag shifts position relative to the console box causing delayed occupant movement restriction

Engineering Contradiction:
Improveinflation and deployment speedVSAvoidoccupant movement restriction effectiveness
Core Design Contradiction:
SpeedVSReliability

Solution Approach 1:

The patent introduces a guide structure consisting of guide surfaces and guide grooves as an intermediary mechanism between the airbag and console box. This guide structure controls the deployment path of the airbag, ensuring it maintains proper positioning relative to the console box even during rapid inflation, thereby preventing the airbag from shifting to incorrect positions while preserving fast deployment benefits

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The airbag is pre-positioned and guided along a predetermined deployment path defined by the guide surfaces and grooves before actual inflation occurs. This preliminary positioning arrangement ensures that when rapid inflation happens, the airbag expands in the correct direction and maintains proper spatial relationship with the console box, avoiding position shifts that would delay occupant restraint

Inventive Principle:
Principle #10Preliminary action

2Device complexity

If the sub bag is abutted against the corner of the console box, then the structure is simplified, but the main bag and sub bag pivot about the corner causing delayed movement restriction

Engineering Contradiction:
Improveairbag structure complexityVSAvoidtime to stop occupant movement
Core Design Contradiction:
Device complexityVSLoss of time

Solution Approach 1:

The airbag system is divided into multiple functional segments: the main bag for occupant restraint, the sub bag for console box interaction, and the guide structure with separate guide surfaces and grooves. This segmentation allows each component to perform its specific function - the guide structure manages deployment timing and positioning while the bags provide restraint, preventing unwanted pivoting motion that would delay occupant movement restriction

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The guide surfaces and guide grooves act as intermediary elements between the abutted sub bag and corner of console box. Instead of direct contact causing pivoting, the guide structure mediates the interaction by providing controlled surfaces that guide the airbag deployment, eliminating the pivoting motion about the corner while maintaining the simplified abutted configuration

Inventive Principle:
Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The side airbag device effectively restricts occupant movement to the inner side in a vehicle width direction by providing a stable and early-stage restraint, preventing pivoting about the console box corner and enhancing the deployment's effectiveness.

Implementation Method 1

an inflator (10) and an airbag (20), wherein the inflator (10) is provided inside the airbag (20)

Methodology Applied
Scientific EffectGas generation:

Implementation Method 2

capable of restricting movement of an occupant to an inner side in a vehicle width direction

Methodology Applied
Scientific EffectMechanical force: Mechanical Force

Data Source

PatentEP3888980B1Side airbag device
Publication Date: 2025.01.08 MAZDA MOTOR CORP
  • EP3888980B1 patent drawingFigure 1~2
  • EP3888980B1 patent drawingFigure 3~4
  • EP3888980B1 patent drawingFigure 5~6

AI summary

The present invention provides a side airbag device (1) capable of restricting movement of an occupant to an inner side in a vehicle width direction in an early stage. The side airbag device (1) includes an inflator (10) configured to generate a gas; and a bag-shaped airbag (20) inflatable and deployable in a space above a console box (60) and beside an occupant (40) seated in a vehicle seat (30) in response to the gas upon activation of the inflator (10) to protect a lateral portion of the occupant (40). The airbag (20) includes a torso protection portion (21) inflatable and deployable in a space beside a torso (41) of the occupant (40), a support portion (22) provided on a console box (60) side of the torso protection portion (21) and configured to be pushed onto a top surface of the console box (60) in an inflated and deployed state, and a hip protection portion (23) inflatable and deployable between a hip (42) of the occupant (40) and a lateral portion of the console box (60). The support portion (22) and the hip protection portion (23) are defined by a continuous chamber. The inflator (10) is positioned from above to below the support portion (22) in a side view of the vehicle. The airbag (20) is mounted on a lateral portion of the vehicle seat (30) via the inflator (10).