Airbag Fastening Clip Assembly With Tactile Mounting Feedback

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Solution Overview

Problem

Existing fastening clips for airbags, such as side-impact and curtain airbags, lack a reliable method for providing instant feedback to installers during the mounting process, leading to potential incorrect mounting and increased installation time.

Innovation Solution

A fastening clip assembly featuring a male and female member with an elastically deflectable retaining member and an indicator member that provides tactile feedback when correctly coupled, ensuring the clip is securely mounted to the attachment panel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If a traditional fastening clip without indicator is used, then the structure is simple, but the installer cannot detect whether the clip has reached its final assembly position

Engineering Contradiction:
ImproveFeedback information to installerVSAvoidClip structure complexity
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent applies feedback by incorporating an indicator member that provides visual or tactile signal to the installer. When the clip is properly assembled, the indicator member moves to a specific position or changes state, giving immediate feedback that the assembly is correct. This resolves the information loss problem without significantly complicating the overall structure.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent utilizes color changes as an indication mechanism. The indicator member is designed to display different colors or color patterns depending on the assembly state - for example, showing one color when properly installed and another when incorrectly assembled. This provides intuitive visual feedback to the installer while maintaining structural simplicity.

Inventive Principle:
Principle #32Color changes

2Reliability

If the installer pushes the clip without feedback mechanism, then the installation process is fast, but the installer may spend unnecessary time or be unaware of incorrect mounting

Engineering Contradiction:
ImproveCorrect mounting assuranceVSAvoidInstallation time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The feedback mechanism allows the installer to immediately know whether the clip is correctly mounted, eliminating the need for time-consuming checks or rework. The indicator provides real-time information during installation, ensuring reliability while actually reducing total installation time by preventing incorrect assemblies.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The clip assembly performs self-verification through the indicator member, which automatically shows the assembly status without requiring additional tools or inspection steps. The system serves itself by providing built-in feedback that confirms proper installation.

Inventive Principle:
Principle #25Self-service

3Reliability

If no indicator member is provided, then the clip assembly is simple to manufacture, but incorrect mounting may lead to unexpected failure

Engineering Contradiction:
ImproveClip mounting reliabilityVSAvoidManufacturing complexity
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

By using color changes in the indicator member, the patent provides a reliable way to distinguish correct from incorrect mounting without complex manufacturing. The color indication can be achieved through simple painted surfaces, colored plastics, or color-coded features that are straightforward to manufacture while significantly improving mounting reliability.

Inventive Principle:
Principle #32Color changes

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 solution provides immediate verification of correct clip mounting, reducing the risk of errors and simplifying the installation process by offering a tactile indication of proper assembly, thus ensuring the airbag is securely attached.

Implementation Method 1

at least one indicator member, extending from said first head portion and away from said first central axis towards said first distal end, adapted to deflect laterally outward from a first position towards a second position

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

at least one elastically deflectable retaining member, adapted to fixingly engage when inserted into an orifice of the second component

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3822497B1Fastening clip assembly
Publication Date: 2023.08.23 ILLINOIS TOOL WORKS INC

AI summary

The present invention generally relates to the field of fasteners and in particular, to the field of fastening clips for attaching one or more components, such as airbag devices, to an external structure. More specifically, the present invention relates to a fastening clip assembly for attaching a side-impact airbag or curtain-type airbag to a vehicle structure. The clip assembly comprises a male member, having a first head portion, provided at a first proximal end along a first central axis, and a coupling portion, extending from said first head portion along said first central axis towards a first distal end. The assembly also comprises a female member, comprising a second head portion, provided at a second proximal end along a second central axis, a body portion, extending from said second head portion along said second central axis towards a second distal end, said body portion having a central aperture configured to couplingly receive said coupling portion of said male member and at least one elastically deflectable retaining member, adapted to fixingly engage when inserted into an orifice of the second component. At least one indicator member is provided, extending from said first head portion and away from said first central axis towards said first distal end, adapted to deflect laterally outward from a first position towards a second position and operably engage with said first head portion, when abuttingly engaged with an upper surface of said second head portion, during use.