Ergonomic Retainer Clip Structure for Low-Force Torque-Resistant Assembly
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Solution Overview
Problem
Current fastening techniques for automotive components are not ergonomically designed, leading to inefficiencies and potential worker safety issues during assembly, as they often require high installation forces and are prone to failure under torque.
Innovation Solution
The development of an ergonomic fastener assembly featuring retainer clips with a large bearing area for thumb insertion, interlocking tabs for torque resistance, and a locking head concept to mitigate failure, allowing for efficient and safe attachment of components with minimal installation force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional fastening techniques are used, then manufacturing simplicity is maintained, but installation force requirements increase and worker safety deteriorates
Solution Approach 1:
The fastener is divided into multiple functional components: a fastener body with a head and shaft, a retainer clip with interlocking tabs, and a panel interface. This segmentation allows each component to be optimized independently - the head provides bearing area for reduced installation force, while the shaft and retainer provide torque resistance, resolving the contradiction between low installation force and high torque performance
Solution Approach 2:
The retainer clip is pre-formed with interlocking tabs and a resilient structure that prepares the fastener for torque resistance before assembly. The head geometry is pre-designed with an optimized bearing area that reduces installation force requirements from the outset, eliminating the need for high-force installation tools and improving worker safety
2Strength
If traditional fastening techniques are used, then device simplicity is maintained, but torque resistance deteriorates
Solution Approach 1:
The fastener system is segmented into a fastener body and a separate retainer clip with interlocking tabs. The retainer clip specifically provides torque resistance through its tab structure that engages with the fastener body, allowing the main fastener body to remain relatively simple while the retainer handles the complex torque resistance function
Solution Approach 2:
The retainer clip acts as an intermediary component between the fastener body and the panel. It mediates the torque loads by providing interlocking tabs that resist rotational forces, protecting the main fastener body from direct torque exposure and allowing it to maintain a simpler structure
3Reliability
If traditional fastening techniques are used, then assembly speed is maintained, but reliability under torque deteriorates
Solution Approach 1:
The retainer clip is designed with a resilient structure that provides beforehand cushioning against torque-induced failures. The interlocking tabs are pre-configured to engage with the fastener body, creating a mechanical interlock that cushions and distributes torque loads, preventing sudden failures while maintaining quick assembly
Solution Approach 2:
The fastener components are pre-designed with optimized geometries - the head bearing area and retainer tab configurations - that prepare the assembly to resist torque failures from the outset. This preliminary optimization ensures high reliability without requiring complex assembly procedures, maintaining productivity
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 ergonomic fastener assembly enhances worker safety and productivity by reducing installation force and providing high torque performance, while preventing failure under torque, thus improving the overall manufacturing process.
Implementation Method 1
a first planar portion and a second planar portion that are resiliently connected via a bend
Implementation Method 2
provide a bearing area for manipulation during assembly
Data Source
AI summary
Described is a stamped-metal ergonomic retainer clip for attaching a first component having a first opening relative to a second component having a second opening. The retainer clip having a first planar portion and a second planar portion, fastener plate, and a guide lip. The first planar portion and the second planar portion are resiliently connected via a bend to define a channel. The fastener plate is resiliently connected to the first planar portion and extends into the channel and configured to couple with the male fastener, while the second planar portion defines a fastener hole to receive the shank. The channel is configured to receive and secure the first component between the fastener plate and the second planar portion. The guide lip is positioned adjacent an opening to the channel and is configured to guide the first component into the channel and to provide a bearing area for manipulation during assembly.