Dual-Zone Panel Retainer for Varying Thickness Fastening
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Solution Overview
Problem
Conventional retainers lack flexibility to accommodate a wide range of component thicknesses, necessitating multiple clip types for different materials, increasing manufacturing complexity and assembly errors in automotive applications.
Innovation Solution
A dual-zone retainer design with an upper and lower retention zone, each optimized for different thickness ranges, allowing secure attachment of components from 0.7 mm to 3.5 mm using a single retainer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional retainers are used for different component thicknesses, then each retainer is optimized for a specific thickness, but multiple clip types are required increasing device complexity
Solution Approach 1:
The retainer is designed with a single structure that can accommodate multiple component thicknesses (0.7mm to 3.5mm) through its dual-zone configuration. The first retention zone with first engagement surfaces and the second retention zone with second engagement surfaces allow the same retainer to securely fasten components of varying thicknesses, eliminating the need for multiple specialized retainers while maintaining reliable retention performance across all thickness ranges.
2Adaptability or versatility
If multiple clip types are used for different materials, then each clip is optimized for specific material thickness, but manufacturing complexity increases
Solution Approach 1:
The retainer design provides universal applicability across different materials (high-strength steel, aluminum, etc.) and thicknesses by incorporating two retention zones with different engagement surface configurations. This single multi-functional retainer replaces the need for material-specific and thickness-specific clip variants, significantly simplifying manufacturing processes and reducing the complexity of production planning and inventory management.
Solution Approach 2:
The retainer body is segmented into two distinct retention zones, each optimized for different thickness ranges. The first retention zone targets thinner components while the second retention zone targets thicker components. This segmentation within a single retainer structure allows it to handle diverse material thicknesses without requiring multiple separate retainer designs, thereby reducing manufacturing complexity while maintaining material compatibility.
3Ease of operation
If conventional retainers are used, then assembly is straightforward for specific thicknesses, but assembly errors increase due to selecting wrong clip types
Solution Approach 1:
The dual-zone retainer design eliminates the need for operators to select different retainer types based on component thickness or material. The single retainer structure with its two retention zones automatically adapts to the component being assembled, ensuring the correct retention mode is engaged regardless of thickness. This universality maintains assembly simplicity while dramatically improving assembly accuracy by eliminating selection errors entirely.
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 dual-zone configuration reduces part count and assembly complexity while maintaining high-performance retention across varying thicknesses, enhancing adaptability in mixed-material applications.
Implementation Method 1
a pair of retainer legs resiliently coupled to the body portion
Data Source
AI summary
Disclosed is a fastener assembly for coupling a first component to a second component. The fastener assembly includes a fastener and a stamped-metal retainer. The fastener includes a head and a shank. The stamped-metal retainer includes a body portion, and a pair of retainer legs resiliently coupled to the body portion. The body portion includes a plate with an internally-threaded collar that defines a retainer opening configured to receive and secure at least a portion of the shank. Each of the pair of retainer legs defines a first retention zone between a first angled engagement surface and the plate that is configured to accommodate second components within a first thickness range, and a second retention zone between a second angled engagement surface and the plate that is configured to accommodate second components within a second thickness range. The distance between the first angled engagement surface and the plate is greater than the distance between the second angled engagement surface and the plate.