Push-On Stud Fastener With Resilient Barbs for Low Installation Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing push-on fasteners are limited in their ability to adapt to multiple stud sizes and require high installation forces, making them inefficient for ergonomic use in automotive applications.
Innovation Solution
A push-on fastener design featuring a base with radial barbs and axial supports that ratchetingly engage studs, reducing installation force and accommodating various stud sizes through a combination of barbs, levers, and arcuate posts for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inwardly-facing barbs are used to retain the push-on fastener on the stud, then the fastener can be securely retained, but high installation force is required
Solution Approach 1:
The fastener employs resilient barbs that can dynamically deflect during installation and then engage with the stud threads. The barbs are designed to flex outward under installation force and then snap back to engage the threads, converting the installation force into a retention mechanism that requires low installation force but provides high retention security.
Solution Approach 2:
The fastener changes the state of the barbs from a rigid fixed position to a resilient deflectable position. By making the barbs resilient rather than rigid, the system can accommodate the dynamic requirements of both low installation force and high retention security through parameter changes in the material properties and geometric configuration of the barbs.
2Device complexity
If fixed-size barbs are used in the push-on fastener, then the structure is simple, but the fastener cannot adapt to multiple stud sizes
Solution Approach 1:
The fastener is designed with resilient barbs that can universally engage with multiple stud sizes. The barbs are configured to deflect and adapt their engagement depth based on the stud diameter, allowing a single fastener design to function across a range of stud sizes without requiring multiple specialized fastener variants.
Solution Approach 2:
The resilient nature of the barbs allows them to dynamically adjust their position and engagement characteristics based on the stud size encountered during installation. This dynamic adaptation enables the same fastener structure to securely engage both smaller and larger studs without requiring structural changes to accommodate different sizes.
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 design allows for adaptable engagement with multiple stud sizes while reducing installation force, enhancing ergonomic installation and conserving resources by simplifying manufacturing and reducing the need for multiple fastener sizes.
Implementation Method 1
the barbs are resilient and can deflect outward to engage an external surface of the stud
Data Source
AI summary
A push-on fastener includes a base, a first radial barb, an axial support, a second radial barb, and a protrusion. The base defines an opening. The first radial barb extends from the base. The axial support extends from the base. The second radial barb extends from the axial support. The protrusion extends from the axial support.