Divided Trim Retainer Housing for Blind Fastening Strength
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Solution Overview
Problem
Existing automotive door trim panels face challenges in achieving a balance between strength and ergonomics in connecting components, particularly in blind fastening applications where retainers are hidden from the outer surface.
Innovation Solution
A retaining system with a divided housing that includes a receiver, clips, and a platform, allowing for flexible insertion and secure retention of retainers, utilizing a divided structure with gaps and clips that flex to accommodate the retainer, and features like ribs and stops for added strength and ergonomic ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid housing structure is used to ensure strength, then structural integrity is improved, but ease of insertion and ergonomic compliance deteriorates
Solution Approach 1:
The housing is divided into two separate parts: a cap and a base, creating a gap between them. This segmentation allows the clips to flex independently, enabling the retainer to be inserted easily while maintaining overall structural integrity when assembled.
Solution Approach 2:
The clips are designed to be flexible rather than rigid, allowing them to dynamically adjust during insertion. The clips can bend to accommodate the retainer and then return to their original position to provide secure retention, combining compliance with strength.
2Ease of operation
If a divided housing with gaps is used to improve ease of insertion, then ergonomic compliance is improved, but structural strength deteriorates
Solution Approach 1:
The housing is divided into a cap and base with gaps between clips and cap, allowing flexible insertion while maintaining strength through the integrated platform and support structures that distribute loads.
Solution Approach 2:
The housing combines rigid elements (platform, supports, cap) with flexible elements (clips) to create a composite structure that provides both strength and compliance, allowing the different parts to perform their specific functions optimally.
3Ease of operation
If clips are added to define the entry and allow flexing, then ease of insertion is improved, but device complexity increases
Solution Approach 1:
The clips are integrated directly into the housing structure rather than being separate components, merging the entry definition and flexing functions into the existing housing geometry, thereby reducing overall device complexity.
Solution Approach 2:
The clips serve multiple functions: they define the entry opening, provide flexible compliance for insertion, and contribute to the overall structural integrity of the housing, reducing the need for additional specialized components.
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 system provides secure, ergonomic, and efficient connection of trim components to the vehicle's structure, ensuring ease of assembly and disassembly while maintaining structural integrity.
Implementation Method 1
The clip is configured to flex to allow insertion of the retainer through the entry
Data Source
AI summary
A retaining system for automotive trim includes a component that has a hole, another component that has a housing, and a retainer that engages with the housing and with the hole. The housing includes a receiver having a cap defining an opening and the housing defines an entry. The opening is configured to receive the retainer when the retainer is inserted through the entry. A clip or clips is/are disposed at the entry and is/are configured to flex to allow insertion of the retainer through the entry. The housing is divided by a gap that is defined between the clip(s) and the cap.